Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| spermatogenesis in birds. | it is concluded that in the birds which have been studied there is a well-defined, regular cycle of the seminiferous epithelium, and that spermatogenesis involves synchronization of the activities of germ cells within and between successive generations to produce cellular associations of the seminiferous epithelium which are essentially similar to those described in mammals. however, the area of a cellular association is smaller in birds than in most (and probably all) mammals so that numerous c ... | 1993 | 8336978 |
| [quantitative ultrastructure of the myocardium of japanese quail after long-term hypodynamia]. | quantitative ultrastructural myocardial changes of myocardium of the japanese quail (coturnix coturnix japonica) were studied during an immobilization stress (hypodynamia) lasting 9, 30, 60 and 90 days. hypodynamic quails were fixed by waistcoats to the feeding place simulating conditions of long lasting space flight which the quails were determined for. the surveyed morphological parametres were: mitochondrial rate, mitochondrial volume in % of cytoplasm, volume of myofibres in % of cytoplasm, ... | 1993 | 8339327 |
| the circadian nature of melatonin secretion in japanese quail (coturnix coturnix japonica). | plasma melatonin concentrations were measured in japanese quail held under different photoperiods and constant darkness (< 1 lux). when subjected to ld6:18 (6 hr light: 18 hr darkness), levels rose approximately 2 hr after lights-off, attained a peak level 8 hr after lights off, and subsequently declined to low daytime levels before the next lights-on signal. this generated a distinct daily rhythm in melatonin secretion with a duration of approximately 13 h. on exposing quail to a range of photo ... | 1993 | 8345447 |
| [forms of xanthine oxidoreductase in the tissues of japanese quail]. | the japanese quail tissues--liver, kidney and pancreas were analysed for the presence of forms of xanthine oxidoreductase utilised cofactors nad+, molecular oxygen or artificial acceptor--methylene blue, as well as for the validity of correlation between enzymatic activity and diet protein content. four groups of animals with the experimental diets, the formulae of which are given in tab. i, and control group with a commercial mash were fed for ten days. for enzyme preparation, the rough purific ... | 1993 | 8346616 |
| visual pigments and oil droplets in genetically manipulated and carotenoid deprived quail: a microspectrophotometric study. | the spectral absorbances of visual pigments and retinal oil droplets were studied in three groups of japanese quail (coturnix coturnix japonica): an unselected control population and two artificially selected strains that exhibited different early approach preferences between blue and red stimuli. the oil droplets were examined with and without prior carotenoid deprivation. four cone pigments and five oil droplet types were identified, resembling those in other avian species. carotenoid deprivat ... | 2007 | 8351832 |
| [quantitative changes in the ultrastructure of myocardial cells in japanese quail during hypergravity, hypodynamia and space flight]. | the experimental work aimed at the quantitative ultrastructure of the myocardial cells of the japanese quail coturnix coturnix japonica during hypergravitation, hypodynamism and space flight in a soviet satellite. for the determination of quantitative changes of the myocardial ultrastructure a morphometrical method was used with parameters like the number of mitochondria, average mitochondrial size, relative mitochondrial volume, deficiency of cristae and relative volume of myofibrils. the quail ... | 1993 | 8353753 |
| three-dimensional structure of a heteroclitic antigen-antibody cross-reaction complex. | although antibodies are highly specific, cross-reactions are frequently observed. to understand the molecular basis of this phenomenon, we studied the anti-hen egg lysozyme (hel) monoclonal antibody (mab) d11.15, which cross-reacts with several avian lysozymes, in some cases with a higher affinity (heteroclitic binding) than for hel. we have determined the crystal structure of the fv fragment of d11.15 complexed with pheasant egg lysozyme (phl). in addition, we have determined the structure of p ... | 1993 | 8356074 |
| photoperiodism in japanese quail (coturnix coturnix japonica) with special reference to relative refractoriness. | cloacal gland (an androgen dependent sex accessory) of japanese quail exhibits full breeding condition as long as these were maintained under long days (ld 16:8). when shifted to short daylength (ld 6:18), scotosensitivity (cloacal gland regression) was observed up to 5 weeks, followed by scotorefractoriness (cloacal gland development). there was a regression in cloacal gland volume of the birds when shifted to intermediate daylength (ld 13.5:10.5 and 13:11) after 12 weeks of exposure to long da ... | 1993 | 8359848 |
| comparative cytotoxic responses of cultured avian and rodent aortic smooth muscle cells to allylamine. | the present studies were designed to compare the acute cytotoxic responses of cultured avian and rodent aortic smooth muscle cells (smcs) to allylamine (aam), a selective vascular toxin. smcs were isolated from male japanese quail or sprague-dawley rats and established in culture by standard procedures. cellular glutathione (gsh) content and lactate dehydrogenase (ldh) leakage were used as indices of cytotoxicity. exposure of avian and rodent smcs in primary culture to aam (0.2-200 microm) for 4 ... | 1993 | 8360943 |
| target cells for the isthmo-optic fibers in the retina of the japanese quail. | the isthmo-optic nucleus (ion) is the major origin of the centrifugal fibers projecting to the avian retina. the retinopetal fibers from the ion were labeled with biocytin and examined light- and electron-microscopically in the japanese quail. the terminals were seen on cell bodies in the inner part of the inner nuclear layer. these neurons innervated with the isthmo-optic fibers appear to constitute a separate population different from the 'ordinary' amacrine cells. | 1993 | 8361645 |
| ultrastructural characteristics of primordial germ cells in the quail embryo. | an avian species, the quail has become a desirable animal model in experimental embryology and reproductive biology. to understand the ultrastructural characteristics of primordial germ cells (pgc) of this species, we studied pgc in the japanese quail (coturnix coturnix japonica) embryo at various developmental stages from their appearance in the germinal crescent through migration to settlement in the gonadal ridges by means of electron microscopy. the results were compared with those of anothe ... | 1993 | 8363058 |
| in vitro study of the contractility of the wall of the preovulatory follicle in the japanese quail. | in the present study, we examined in vitro the potassium-induced contractions of isolated parts of the wall of the quail preovulatory follicle through use of an electromagnetic force-length transducer system. we studied longitudinal and transverse strips of the whole wall, of the theca, and of the outer layer (tunica albuginea and surface epithelium). it was observed that force development and shortening of strips of the whole wall and those of the theca are similar. statistical analysis of maxi ... | 1993 | 8373961 |
| effects of neurochemical lesions of the preoptic area on male sexual behavior in the japanese quail. | two experiments were carried out during which the noradrenergic neurotoxin, 5-amino-2,4-dihydroxy-alpha-methylphenylethylamine (5-admp) was applied to the brain of quail in order to evaluate the role of the noradrenergic system in the control of male copulatory behavior. in the first experiment, the icv injection of 5-admp slightly enhanced the sexual behavior observed in testosterone (t)-treated castrated male quail. this brings additional support to the notion that norepinephrine tonically inh ... | 1993 | 8374807 |
| divergent selection for growth in japanese quail under split and complete nutritional environments. 7. heterosis and combining ability among diallel crosses following twenty-seven generations of selection. | growth patterns of quail lines divergently selected for 4-wk bw under split and complete nutrition environments were investigated utilizing a diallel mating scheme. the design, involving 16 mating combinations, allowed investigation of heterotic effects, reciprocal cross effects, and combining ability. progeny from generation 27 breeders were evaluated in two hatches under both selection diets. heterosis for hatch weight was essentially zero; however, percentage heterosis from high x high crosse ... | 1993 | 8378218 |
| proteins of the vitelline membrane of quail (coturnix coturnix japonica) eggs. | proteins in the vitelline membrane of quail (coturnix coturnix japonica) eggs were analyzed by sds-page. ten major bands, molecular mass ranging from 14.5 to 285 kda, can be clearly distinguished. two bands corresponding to the molecular masses of 33 and 175 kda were detected in the inner layer of the membrane and both were stained with periodic acid-schiff reagent, indicating that they are glycoproteins. nine bands were detected in the outer layer of the membrane. among them, 265- and 285-kda b ... | 1993 | 8378223 |
| distribution and characterization of melatonin receptors in the brain of the japanese quail, coturnix japonica. | 2-[125i]iodomelatonin was used to study the distribution and properties of the melatonin receptor in the japanese quail brain. high receptor density was detected in the major targets of direct retinal input (optic tectum, nucleus of the optic basal rout, ventrolateral geniculate nucleus), as well as areas representing terminals in the visual pathways (nucleus rotundus, ectostriatum, thalamo-hyperstriatal pathway). binding was also found in the piriform cortex, the hypophyseal pars tuberalis, the ... | 1993 | 8385754 |
| survival of vitamin d-deficient embryos: time and choice of cholecalciferol or its metabolites for treatment in ovo. | vitamin d-deficient (-d) japanese quail embryos [from hens fed 1,25-dihydroxycholecalciferol (1,25-(oh)2d3)] die at day 15 of incubation from severe calcium deficiency. single doses of 125 ng cholecalciferol, 600 ng 24,25-dihydroxycholecalciferol [24,25-(oh)2d3], or 100 ng 1,25-(oh)2d3 were found to increase hatchability when injected into eggs prior to incubation. cholecalciferol could be used from 125 to 1,250 ng per egg with no detrimental effects on hatchability, whereas single doses of 1,25 ... | 1993 | 8391690 |
| recombination nodules and axial equalization in the zw pairs of the peking duck and the guinea fowl. | the meiotic z and w chromosomes of the guinea fowl (numida meleagris) and the peking duck (anas platyrhynchos) show features similar to those described previously for 3 species of phasianidae: chicken, japanese quail and bobwhite quail. axial equalization in the gonosomes of the peking duck involves lengthening of the w axis along with shortening of the z axis. a single recombination nodule is constantly found in the synaptic, terminal region of the zw pairs stained with phosphotungstic acid. th ... | 1993 | 8404053 |
| heritabilities of growth curve parameters and age-specific expression of genetic variation under two different feeding regimes in japanese quail (coturnix coturnix japonica). | this study investigated genetic variation in growth and final size in relationship to differences in heritabilities under good and poor feeding conditions. heritabilities of growth and final size were estimated for several traits under ad libitum and restricted feeding conditions. a 30% feed restriction from hatching to 44 days of age in japanese quail chicks decreased body weight and tarsus length at 44 days of age and the length of the third primary convert feather at 24 days of age relative t ... | 1993 | 8405992 |
| electron microscope observations on lh-induced oocyte maturation in japanese quail (coturnix coturnix japonica). | the aim of this study was to describe the temporal sequence of ultrastructural changes in the boundary between the preovulatory oocyte and its surrounding follicular wall during maturation induced by injection of lh. female japanese quail were injected with ovine lh (20 micrograms per bird) 10-12 h before the expected time of ovulation. the largest and second largest follicles were excised before or 1, 2, 4 or 6 h after injection. the oocyte and the surrounding follicular wall were processed for ... | 1993 | 8410804 |
| sexual approach conditioning: unconditioned stimulus factors. | unconditioned stimulus (us) factors were investigated in a pavlovian sexual conditioning paradigm with male japanese quail (coturnix coturnix japonica). copulation with a female quail was more effective than exposure to a female without copulation, but the latter also produced conditioned responding (experiment 1). the greater effectiveness of copulatory opportunity as a us was probably not due to nonassociative effects of copulation (experiment 2). visual cues of the female, as presented on a t ... | 1993 | 8418215 |
| sexual approach conditioning: tests of unconditioned stimulus devaluation using hormone manipulations. | contents of learning that result from conditioned-unconditioned stimulus pairings in sexual approach conditioning were explored with male japanese quail (coturnix coturnix japonica). sexual motivation of subjects conditioned to approach an arbitrary stimulus in a pavlovian sexual conditioning paradigm was reduced by exposing them to a short photoperiod. decreased sexual motivation resulted in a decline in sexually conditioned approach behavior (experiments 1 and 2). responding was restored when ... | 1993 | 8418216 |
| activity of cholinesterases in the japanese quail embryo. effects of dichlorphos on the embryonic development. | cholinesterase activity is detectable in the japanese quail embryo, in the yolk and subembryonic liquid, but not in the albumen. obviously, this enzyme is deposited by the hen into the yolk and from there it is transferred to the subembryonic liquid. in contrast, in the embryo the enzyme is synthesized by itself and the amount increases with the age of the embryo. by using bw284c51 1,5-bis-(4-allyldimethylammoniumphenyl)pentan-3-one bromide and iso-ompa tetraisoprophylpyrophosphoramide as inhibi ... | 1993 | 8424827 |
| estrogen receptors in the avian brain: survey reveals general distribution and forebrain areas unique to songbirds. | estrogens play an important role in the control and differentiation of species-typical behavior and in endocrine homeostasis of birds, but the distribution and evolution of cells that contain estrogen receptors in the avian brain are poorly understood. this study therefore surveys 26 species in the avian orders anseriformes (1 species), galliformes (2), columbiformes (3), psittaciformes (1), apodiformes (2), and passeriformes (3 suboscines, 14 oscines). indirect immunocytochemistry with the estr ... | 1993 | 8432903 |
| responses to isolation in japanese quail genetically selected for high or low sociality. | the adrenocortical, behavioral, and leucocytic responses to isolation, for 1, 3, or 72 h, of 7-10-day-old japanese quail chicks, of lines selected for high (hsr) or low (lsr) levels of social reinstatement (sr) behavior, were studied. isolation had no effect on plasma corticosterone levels of heterophil/lymphocyte measures in lsr line chicks. conversely, circulating corticosterone levels were increased after 1 h of isolation in the hsr line, although they fell to control levels thereafter. heter ... | 1993 | 8434061 |
| effects of hypercholesterolemia on tissue antioxidant status in two species differing in susceptibility to atherosclerosis. | uncontrolled oxidation has been implicated in the pathogenesis of atherosclerosis. in order to investigate the possible influence of hyperlipidemia on endogenous antioxidant status, the effects of dietary cholesterol supplementation on antioxidant enzymes and in vitro susceptibility to oxidative challenge (as measured by glutathione depletion and lipid peroxidation) were compared in two species exhibiting high and low susceptibilities to atherosclerosis, namely japanese quail and rat, respective ... | 1993 | 8451540 |
| immunoelectron microscopic detection of estrogen target cells in the bone marrow of estrogen-treated male japanese quail. | the localization of estrogen receptors (ers) in bone marrow cells was studied immunoelectron microscopically in the femurs of estrogen-treated male japanese quail. the electron-dense reaction product showing er localization was not detected in the bone marrow cells of the male quail. after 48 h of estrogen treatment, nuclear reaction product was observed in many mononuclear cells in the bone marrow. most were located in the marrow stroma, and they were divided into undifferentiated and different ... | 1993 | 8453320 |
| effect of anabolic steroids on new fiber formation and fiber area during stretch-overload. | the efficacy of anabolic steroid treatment to increase the extent of overload-induced new fiber formation and fiber hypertrophy was examined in anterior latissimus dorsi (ald) muscles of japanese quails. adult quails were assigned to a control group (n = 20), which received stretch but no steroid (ns), or a stretch+steroid group (s), which received either nandrolone decanoate (n = 20) or testosterone enanthate (n = 12). steroids were administered at 4.0 mg.kg body wt-1 x day-1. a weight correspo ... | 1993 | 8458803 |
| lipoprotein and apoprotein profile of japanese quail. | the present study delineated the lipoprotein and apoprotein distribution in japanese quail. quail lipoprotein was composed of three fractions: vldl, d < 1.020; ldl, 1.020 < d < 1.081; hdl, 1.081 < d < 1.210. when animals were fed the cholesterol-free diet, hdl was the predominant form, ldl intermediate, vldl and chylomicron were smallest in amount. feeding of cholesterol induced a marked change in the lipoprotein profile: vldl or chylomicron predominated over hdl and ldl. an apoprotein of 26 kd ... | 1993 | 8461329 |
| ultrastructural changes of oocyte and follicular wall during oocyte maturation in the japanese quail (coturnix coturnix japonica). | this study examined structural changes in oocyte and follicular wall during oocyte maturation in japanese quails. the structures of the germinal disc and the surrounding follicular wall were observed by light and electron microscopy 25, 6 and 1 h before the expected time of ovulation. the germinal disc of the oocyte was located near the oocyte plasma membrane at 25 h before ovulation, and the germinal vesicle was located in the centre of the germinal disc. numerous cytoplasmic elements, such as ... | 1993 | 8464010 |
| research note: effect of diet density and pelleting on productive parameters of japanese quail. | an experiment was conducted to determine the response of growing japanese quail to two dietary energy levels, high (3,200 kcal me/kg) versus low (3,000 kcal me/kg), and two forms of presentation, mash versus pellet. seven thousand, two hundred day-old japanese quail (coturnix coturnix japonica) were randomly distributed into 24 floor pens containing 300 quail each. the experiment was divided in two phases: starter (until 2 wk of age) and finisher (days 14 to 33). weight gain was less (p < .05) f ... | 1993 | 8464802 |
| neurofilament deficiency in quail caused by nonsense mutation in neurofilament-l gene. | the existence of a neurofilament-deficient mutant of japanese quail was recently documented (yamasaki, h., c. itakura, and m. mizutani. 1991. acta neuropathol. 82:427-434), but the genetic events leading to the neurofilament deficiency have yet to be determined. our molecular biological analyses revealed that the expression of neurofilament-l (nf-l) gene was specifically repressed in neurons of this mutant. to search for mutation(s) responsible for the shutdown of this gene expression, we cloned ... | 1993 | 8468353 |
| experimental candidiasis in japanese quail: pathological changes. | candidiasis was experimentally produced in young japanese quail by oral administration of candida albicans cells. lesions were confined to upper digestive tract with most characteristic changes occurring on the mucosa of crop. no lesions were observed in other tissues of the body. the initial changes in the crop were characterized by thickening and yellowish-white necrotic plaques on the mucosa. from 10th day onwards, there was marked thickening and corrugations of the crop mucosa giving it a ty ... | 1993 | 8469270 |
| amino-acid sequence of the alpha d- and beta-polypeptide chains of the japanese quail hemoglobin. | two hemoglobin components are recognized in the erythrocytes of the adult japanese quail: a major (q-ii) and a minor (q-i) component. we have determined the amino-acid sequence of the alpha d-globin of the minor component and the beta-globin which is common to both components by conventional protein sequence analysis. the sequences of both the alpha d- and the beta-globins showed close homology with those of their counterpart constituents in other avian hemoglobins. proline at position 119 in th ... | 1993 | 8471178 |
| [a possible pathway for mitogenic signal transmission during the contact stimulation of the multiplication of cultured cells]. | cultured cells of the japanese quail embryo were labeled with 3h-glucosamine, fixed, suspended and inoculated into built-up cultures of the homologous cells. the transfer of insoluble components of labeled cell surface into the cells of underlaying cell sheet was revealed. a decrease in the cell incubation temperature up to 4 degrees c blocks the process. the exchange of cell surface sites between contacting cells seems to be one of the possible ways of information transmission from one cell int ... | 1993 | 8475579 |
| subtelencephalic visual discrimination in selected lines of japanese quail. | we studied visual discrimination capabilities of the avian brain stem in genetic lines of japanese quail artificially selected for unconditional approach preference for blue, red or an achromatic pattern stimulus. complete telencephalectomy did not abolish approach behavior and visual discrimination. our data indicate that visual feature extraction and motor coordination related to early approach preferences in birds may be mediated by brain stem and thalamic circuitries which do not require inp ... | 1993 | 8477047 |
| stimulus control of copulatory behavior in male japanese quail. | the copulatory behavior of sexually experienced male japanese quail was tested using taxidermic models with varying proportions of natural and artificial features. completely artificial models exerted little control over copulatory behavior, and whole natural body models reliably elicited copulatory behavior. in single model presentation tests, a model containing a natural head and neck with an artificial body was as effective in eliciting copulatory behavior as a whole body model, but a model c ... | 1993 | 8479957 |
| evidence that estrogen binding sites are present in bone cells and mediate medullary bone formation in japanese quail. | studies were carried out in japanese quail to characterize the binding of estrogen to bone cells and to determine whether induction of medullary bone by estrogen is mediated by estrogen receptors. first, attempts were made to identify specific, high affinity nuclear binding sites for estrogen with a nuclear exchange assay in oviduct and femora from laying female quail and in liver, kidney, and femora from adult male quail treated with estradiol valerate (2 mg per bird). high-affinity nuclear est ... | 1993 | 8479958 |
| developmental retardation of the japanese quail embryo under the influence of dexamethasone. | cultured japanese quail embryos were treated with various doses of dexamethasone on day 2 and in part also on day 5. the treatment lead to a significant delay of development. this was demonstrated by means of developmental (growth rate, developmental stage), histological and metabolic (excreted uric acid, protein synthesis) parameters. the effect was intensified when the agent was administered into the subembryonic liquid instead of the albumen. this is due to the fact that a higher dilution is ... | 1993 | 8480074 |
| the neuroanatomic binding pattern of [125i]atrial natriuretic factor in the japanese quail brain. | application of quantitative autoradiography technique provided a discrete anatomical distribution pattern of the atrial natriuretic factor (anf) in the japanese quail, coturnix coturnix japonica, brain. the highest binding levels of [125i]anf were shown to occur in telencephalon areas, such as fasciculus diagonalis brocae (232 fmol/mg protein), septum (194 fmol/mg protein) and olfactory bulb (153 fmol/mg protein), and in posterior sites, such as nucleus interpeduncularis (177 fmol/mg protein), w ... | 1993 | 8506079 |
| effects of bis(tri-n-butyltin)oxide in japanese quail exposed during egg laying period: an interlaboratory comparison study. | the guideline no. 206 for testing of chemicals of the organization for economic cooperation and development (oecd) comprising an avian reproduction test using the japanese quail (coturnix coturnix japonica; termminck and schlegel 1849) as pair-hold test organisms has been applied in a version that reduced the treatment period to 6 weeks without any pretreatment. in the present study bis(tri-n-butyltin)oxide, c.a. no. 56-35-9 (tributyltin oxide, tbto) was examined by five participants in an inter ... | 1993 | 8507099 |
| the prevalence and retention of lead pellets in japanese quail. | thirty-six japanese quail (18 control birds, 18 lead-dosed birds) were used. the 18 quail were dosed with #4 lead weight that were orally inserted into the proventriculus. delta-aminolevulunic acid dehydrase (alad) activity in erythrocytes in the dosed quail decreased 90% (p < 0.01) after one week as compared with the undosed quail. this inhibition of alad activity in erythrocytes indicates lead exposure. radiographics were obtained at 0, 1, 4, 9, 22, and 32 days. the lead pellets remained in th ... | 1993 | 8507102 |
| persistence of approach response after decerebration in newly hatched quail chicks. | the role of telencephalon in controlling the unconditional approach response was studied in newly hatched japanese quail chicks by lesions. approach to flickering light and a moving object were not diminished by ablation of various telencephalic areas, ranging from caudal forebrain lesions to complete bilateral hemispherectomy. open field activity and tonic immobility were likewise unaffected. results indicated that the neural mediation of unconditional sensory-motor components of imprinting is ... | 1993 | 8511175 |
| effect of inducers and pcbs on the cytochrome p450 enzymes in cultured quail hepatocytes. | hepatocytes isolated from fetal quail livers (coturnix coturnix japonica) were cultured in vitro. their capacity to metabolize drugs and xenobiotics was explored with typical cytochrome p450 substrates: ethoxycoumarin (known to be metabolized by several p450s), ethoxyresorufin (essentially dealkylated by p450ia1), and testosterone (specifically hydroxylated at several positions by several p450s). the cells could be kept metabolically active in culture for at least 4 days. their drug-metabolizing ... | 1995 | 8521782 |
| specific activation in jun-transformed avian fibroblasts of a gene (bkj) related to the avian beta-keratin gene family. | we have analyzed differential gene expression in normal versus jun-transformed avian fibroblasts by using subtracted nucleic acid probes and differential nucleic acid hybridization techniques for the isolation of cdna clones. one clone corresponded to a gene that was strongly expressed in a previously established quail (coturnix japonica) embryo fibroblast line (vcd) transformed by a chimeric jun oncogene but whose expression was undetectable in normal quail embryo fibroblasts. furthermore, the ... | 1995 | 8524838 |
| chronic influence of pyrethroid supermethrin on some reproductive features in japanese quail (140 days long avian reproduction test). | we observed the influence of chronic effect of pyrethroid supermethrin on some reproduction features in japanese quails. they received 3 different doses (p1 10.7 mg.kg-1.day-1; p2 21.4 mg.kg-1.day-1 and p3 35.7 mg.kg-1.day-1) of the tested substance during 20 weeks. the total health status, reproduction of japanese quails, the damage rate (degree) of the organs and tissues as well as the determination of residue in the eggs and muscles of the experimental birds showed that pyrethroid insecticide ... | 1995 | 8535369 |
| the occurrence of a mutant dimerizable histone h5 in japanese quail erythrocytes. | an allelic variant of linker histone h5 has been found in the erythrocytes of japanese quail (coturnix japonica) descended from a small group of feral birds captured on the island of hawaii. this variant spontaneously forms protein dimers in vitro in the absence of reducing agents. that this depends upon the introduction of a sulfhydryl group (presumably because of a cysteine substitution) is indicated by its reaction with 2-nitro-5-thiocyanobenzoate and by its fluorescence after reaction with 4 ... | 1995 | 8537005 |
| inherited muscular disorder in mutant japanese quail (coturnix coturnix japonica): relationship between the development of muscle lesions and age. | the progression of the pathological changes that occur in the skeletal muscle was examined in 19 japanese quail of the lwc strain, affected with an autosomal dominant inherited muscular disorder producing electrical myotonia. the muscle samples were obtained every 10 days from 20 to 70 days of age. muscle samples from 18 age-matched commercial quail were used as normal controls. characteristic histological lesions found in the skeletal muscles included sarcoplasmic masses, ringed fibres, interna ... | 1995 | 8543670 |
| vagal preganglionic neurons innervating the different gastric regions in the japanese quail (coturnix japonica). | the cytoarchitecture and distribution patterns of the vagal preganglionic neurons within the dorsal motor nucleus of the vagus nerve (dmnx) innervating the proventriculus and the gizzard of the japanese quail were examined by nissl staining and the horseradish peroxidase (hrp) method. a 30% solution of hrp was injected into nine different gastric regions: the ventral and dorsal parts of the proventriculus, the caudodorsal and cranioventral thick muscles, the craniodorsal and caudoventral thin mu ... | 1995 | 8559557 |
| atherosclerosis in japanese quail males selected for high or low plasma cholesterol. | three lines of japanese quail males, unselected controls (cl), high response (hl), and low response (ll) lines, selected for plasma total cholesterol for 18 generations, were fed all-plant source, nonatherogenic diets to which 0 or .5% cholesterol were added from 6 to 18 wk of age. atherosclerotic scores (as) of aorta of hl birds fed cholesterol were significantly higher than those of ll birds fed cholesterol. scores of ll fed cholesterol were not higher than ll not fed cholesterol. fatty infilt ... | 1995 | 8559737 |
| effects of diencephalic lesions on approach responses and color preferences in quail. | the effects of stereotaxic radio-frequency lesions on artificially selected approach responses and artificially selected or imprinted red or blue preferences were studied in japanese quail chicks. no effects were found from lesions in anterior preoptic or pretectal areas and only slight attenuation of red preferences by lesions in nucleus rotundus, opticus principalis thalami and geniculatus lateralis pars ventralis. extensive lesions in medial diencephalic and bordering areas of telencephalon, ... | 1995 | 8559774 |
| autoradiographic localization of d1-like dopamine receptors in the forebrain of male and female japanese quail and their relationship with immunoreactive tyrosine hydroxylase. | the distribution of d1-like dopamine receptors was studied in the brain of male and female japanese quail (coturnix japonica) by means of quantitative autoradiography with 3h-labelled d1 selective antagonist, sch 23390, serving as a ligand. a specific, saturable, high affinity binding of this ligand was demonstrated. high densities of binding sites were detected in the lobus parolfactorius, olfactory tubercle, and paleostriatum augmentatum. medium densities were observed in the entire neostriatu ... | 1995 | 8561950 |
| establishment of the mesodermal cell line qce-6. a model system for cardiac cell differentiation. | the qce-6 cell line was derived from precardiac mesoderm of the japanese quail. as previously reported, these cells are able to differentiate into two distinct cardiac cell types with myocardial or endocardial endothelial cell properties. this present communication describes in detail the derivation of this cell line and further characterizes the nontreated and induced myocardial and endothelial phenotypes of these cells. the qce-6 cells exhibit an epithelial morphology, as well as the pattern o ... | 1996 | 8575063 |
| characterisation of melatonin binding sites in the eye of the japanese quail (coturnix japonica). | melatonin binding sites were examined in the quail eye using 2-[125]iodomelatonin. radioreceptor assays indicated similar binding sites in membrane preparations of neural retina (nr) and choroid-retinal pigment epithelium (c-rpe) eye components. in both tissues binding of the radioligand was specific, saturable, and of high affinity [kd values nr 50.8 +/- 19.5 pm, c-rpe 98.2 +/- 35.4 pm, mean +/- sem (n = 4)] and low capacity (bmax values nr 12.4 +/- 2.7 fmol/mg protein, c-rpe 21.5 +/- 3.2 fmol/ ... | 1995 | 8582600 |
| nitrogen excretion in japanese quail during protein depletion and repletion. | the influence of protein depletion and repletion on the excretion of uric acid, urea, creatinine and free arginine as well as on the activities of xanthine dehydrogenase and arginase in japanese quail was studied. adult cockerels normally fed until the age of 42 days were kept on a protein free diet for 21 days and subsequently for 14 days on the previous normal diet. the control group was fed normal diet for the whole time. in 1-5 days intervals the enzyme activities and the n-metabolites in 24 ... | 1993 | 8585792 |
| stretch-induced transformations in myosin expression of quail anterior latissimus dorsi muscle. | we have previously found alterations in expression of native myosin isoforms during adaptations to 30 d of stretch-induced hypertrophy in the quail anterior latissimus dorsi muscle (ald). however, myosin heavy and light chain expression have not been studied during adaptations to stretch. in the current study, expression of myosin heavy and light chains and native myosin isoforms were characterized after placing a weight on one wing of japanese quail for 0, 7, 14, or 21 d (n = 8 birds.d-1). ald ... | 1995 | 8587485 |
| influence of various dietary protein levels on carcase composition in the male japanese quail (coturnix coturnix japonica). | 1. the present study was conducted to determine the effect of various dietary protein concentrations on the carcase composition of male japanese quail. 2. six diets varying in protein from 160 to 300 g/kg and containing approximately 11.72 mj/kg me were fed for 5 weeks and analysed for dry matter, protein, fat and ash. 3. treatments affected carcase weight, dry matter, protein, ether extract and ash (p < 0.01). 4. the water content of the carcases decreased with increasing dietary protein concen ... | 1995 | 8590093 |
| development of metabolic response in male quail brain during sexual maturation. | seasonal reproductive activities of japanese quail coturnix japonica are induced most obviously by stimulatory effects of long-day photoperiod. this study addressed the metabolic response, as measured by 2-deoxyglucose (2-dg), in brain of male quail during sexual maturation. at 7 weeks of age, reproductively quiescent quail exposed to a short photoperiod of 6l:18d, received 2-dg on day 0 and +3, +6, +9, +12, +15 and +18 days after onset of 16l:8d. brains were processed for autoradiography; serum ... | 1995 | 8593573 |
| effects of testosterone and its metabolites on aromatase-immunoreactive cells in the quail brain: relationship with the activation of male reproductive behavior. | the enzyme aromatase converts testosterone (t) into 17 beta-estradiol and plays a pivotal role in the control of reproduction. in particular, the aromatase activity (aa) located in the preoptic area (poa) of male japanese quail is a limiting step in the activation by t of copulatory behavior. aromatase-immunoreactive (aro-ir) cells of the poa are specifically localized within the cytoarchitectonic boundaries of the medial preoptic nucleus(pom), a sexually dimorphic and steroid-sensitive structur ... | 1996 | 8603040 |
| an oviposition-inducing peptide: isolation, localization, and function of avian galanin in the quail oviduct. | it is well established that avian oviposition is regulated, at least partly, by a neurohypophysial hormone, arginine vasotocin, and ovarian hormones, prostaglandins, are regulated through mechanisms of the induction of uterine contractions. although abundant nerves are terminated in the musculature in the uterine and vaginal oviduct regions, limited information is available on the neuronal control mechanism of avian oviposition. to identify the oviduct factor that plays an important role in the ... | 1996 | 8612493 |
| heterosis and overdominance following long-term selection for body weight in japanese quail. | although nonadditive genetic variation is more important in crosses among laying stocks than among meat stocks, development of special sire and dam lines to control the release of primary lines results in broilers being the product of three- or four-way crosses. therefore, nonadditive genetic effects are important in meat stocks because of opportunities to combine stocks that complement each other. four experiments were conducted to investigate heterosis and overdominance arising from crossing j ... | 1995 | 8614682 |
| pathogenicity of quail's inclusion body hepatitis virus (avian adenovirus-1) for japanese quails and broiler chicks. | quail (coturnix coturnix japonica) and broiler (gallus domesticus) chicks were inoculated experimentally with ibh virus (avian adenovirus-1) derived from quails to determine its pathogenicity. quail chicks were inoculated by the intraperitoneal route at 3, 4, 5, 6 or 7 weeks of age. lesions were encountered most frequently in the liver, kidneys and lungs. these included pale, swollen and mottled liver, swollen nephrotic kidneys, and congested and pneumonic lungs. the lesions were severe in birds ... | 1995 | 8619292 |
| modulation of vitellogenin ii gene by estradiol and progesterone in the japanese quail. | estrogen and progesterone receptors are reported to functionally cooperate in gene activation if their cognate binding sites are close to one another in the gene. our studies show that the expression of the vitellogenin (vtg) gene is induced by estradiol alone or along with progesterone. progesterone alone inhibits the expression completely. methylation status of the vtg gene remains unaltered by steroid hormones. gel mobility shift assay shows that qualitative and quantitative changes occur in ... | 1996 | 8630066 |
| the circadian rhythm of thermoregulation in japanese quail: iii. effects of melatonin administration. | recent studies indicate that the circadian pacemakers in the eyes of japanese quail are coupled to the rest of the circadian system by both neural and hormonal outputs. the effects of exogenous melatonin administration on circadian body temperature and activity rhythms of quail were tested to determine whether melatonin could be the hormonal link involved. continuous melatonin administration caused arrhythmicity or period changes in the body temperature and activity rhythms of pinealectomized an ... | 1995 | 8639937 |
| analysis of poultry fertility data. 3. analysis of the duration of fertility in naturally mating japanese quail. | the purpose of the present study was to test the appropriateness of iterative least squares regression for the evaluation of fertility data in naturally mating quail. in each of four trials, 20 male and 200 female randombred japanese quail were housed in stacked breeder cages. paired females were exposed to their assigned male for a single 48-h period. eggs were collected for 2 wk following removal of the male, incubated, and fertility determined by visual inspection at egg breakout. in trials 1 ... | 1996 | 8650104 |
| characteristics of enterococci and staphylococci isolated from the crop and caecum of japanese quails exposed to microgravity conditions. | ten selected strains of enterococci and staphylococci were isolated from the crop and caecum of japanese quails exposed to microgravity conditions. isolates were allotted to the species enterococcus gallinarum, ent. avium, ent. faecium, staphylococcus gallinarum and staph. aureus. isolated strains were facultatively anaerobic, non-motile, gram-positive cocci, occurring in pairs, short chains or irregular clusters. isolates utilized most of the soluble sugars tested and produced bacteriocin-like ... | 1995 | 8659081 |
| effects on pcbs on liver ultrastructure and monooxygenase activities in japanese quail. | 1996 | 8661870 | |
| subtypes of active cell death in the granulosa of ovarian atretic follicles in the quail (coturnix coturnix japonica). | follicular atresia in the ovaries of japanese quail was studied by cytochemistry and electron microscopy. three different types of cell death coexisted in the granulosa. a large number of cells showed signs of apoptosis. the dna fragmentation in these cells was demonstrated in a previous study using in situ end-labeling. a second and non-negligible type of cell death consisted of extensive autophagocytosis of the cytoplasm occurring simultaneously with late nuclear alterations. finally, a few de ... | 1996 | 8663915 |
| involvement of (n-6) essential fatty acids and prostaglandins in liver lipid accumulation in japanese quail. | to investigate the involvement of (n-6) essential fatty acids, such as linoleic acid [18:2(n-6)] or gamma-linolenic acid [18:3(n-6)], and of prostaglandins on liver lipid accumulation in japanese quail. | 1996 | 8669766 |
| learning and male-male sexual competition in japanese quail (coturnix japonica). | male japanese quail (coturnix japonica) were trained individually to discriminate between 2 sounds presented at opposite ends of an outdoor aviary. one of the sounds (the positive conditioned stimulus [cs+]) was associated with the release of a female, and the other (the negative cs [cs-]) was presented alone. which of the 2 sounds served as the cs+ (and which served as the cs-) was counterbalanced across subjects. the subjects came to approach their cs+ but did not move away from their cs-. aft ... | 1996 | 8681530 |
| plasma thyroid hormone and growth hormone patterns in precocial japanese quail and altricial european starlings during postnatal development. | plasma concentrations of thyroid hormones (th) and growth hormone (gh) during postnatal development in the precocial japanese quail (coturnix japonica), and the altricial european starling (sturnus vulgaris) were measured. developmental changes in plasma th found in the starling, differ considerably from those detected in quail. in quail rather high triiodothyronine (t3) values were measured during the first few days after hatching. subsequently a steady decrease of plasma t3, to adult levels, w ... | 1996 | 8689527 |
| dietary effects of corn oil, oleic acid, perilla oil, and evening [corrected] primrose oil on plasma and hepatic lipid level and atherosclerosis in japanese quail. | to compare the atherogenecity of different fats and oils, a total of forty, 40-day-old male japanese quails were fed one of the following diets for three months: basal diet (control), a diet-containing 15% corn oil (co) and 2% cholesterol (ch), a diet-containing 15% oleic acid (ol) and 2% ch, a diet-containing 15% perilla oil (pe) and 2% ch, a diet-containing 15% evening [corrected] primrose oil (pr) and 2% ch. a higher plasma cholesterol concentration was found in the birds in the co and ol gro ... | 1996 | 8689581 |
| sign tracking versus goal tracking in the sexual conditioning of male japanese quail (coturnix japonica). | pairings of a conditioned (cs) and unconditioned (us) stimulus can result in approach to either the cs (sign tracking) or the us (goal tracking). increasing the spatial or temporal separation between the cs and a us food has been reported to results in a decline in sign tracking and an increase in goal tracking. in the present experiments, sign tracking was the predominant response of male quail (coturnix japonica) to a cs that was presented up to 91 cm from the door through which a female was p ... | 1996 | 8691160 |
| monophyletic origin and unique dispersal patterns of domestic fowls. | with the aim of elucidating in greater detail the genealogical origin of the present domestic fowls of the world, we have determined mtdna sequences of the d-loop regions for a total of 21 birds, of which 12 samples belong to red junglefowl (gallus gallus) comprising three subspecies (six gallus gallus gallus, three gallus gallus spadiceus, and three gallus gallus bankiva) and nine represent diverse domestic breeds (gallus gallus domesticus). we also sequenced four green junglefowl (gallus variu ... | 1996 | 8692897 |
| insect hormones in vertebrates: anabolic effects of 20-hydroxyecdysone in japanese quail. | ecdysteroids are hormones controlling cell proliferation, growth and the developmental cycles of insects and other invertebrates. they are occasionally present in various unrelated plants for no apparent reason; no phytohormonal function has yet been identified. in certain cases, ecdysteroids are accumulated to high levels in leaves, roots or seeds. some ecdysteroid-containing plants have been known as medicinal plants for centuries. one of them, leuzea carthamoides iljin (asteraceae), growing i ... | 1996 | 8698114 |
| proliferation of granulosa and thecal cells in germinal disc and non-disc regions during follicular growth in japanese quail (coturnix coturnix japonica): bromodeoxyuridine incorporation in situ. | proliferation of granulosa and thecal cells was analysed during ovarian follicular growth in laying japanese quail. the birds were injected intraperitoneally with bromodeoxyuridine (brdu) 10 or 4 h before ovulation, that is, before or after a preovulatory lh surge, respectively, and incorporation of brdu by follicular tissues was detected immunocytochemically. cells labelled with brdu were seldom seen in the most immature follicles in the ovarian cortex, whereas many granulosa and thecal cells w ... | 1996 | 8699425 |
| testosterone effects on the neuronal ultrastructure in the medial preoptic nucleus of male japanese quail. | dorsolateral neurons of the medial preoptic nucleus (pom) of male japanese quail are sensitive to the plasma levels of testosterone: their volume and optical density in nissl-stained sections increase in castrated birds treated with testosterone. the present study was performed on castrated male quail treated or not with silastic implants filled with testosterone to describe the ultrastructural variations induced by testosterone in these neurons. gonadally intact male birds were included as cont ... | 1996 | 8705315 |
| experimental chlamydia psittaci infection of japanese quail. | japanese quail were used for the infection model of avian chlamydiosis. one-day-old japanese quail were highly susceptible to lethal infection by a chlamydia psittaci strain of budgerigar origin upon inoculation via the air sac route with 10(4.1) ffu of the organism, showing an acute and lethal course with chlamydial propagation. in contrast, 7-day-old quail developed resistance to the infection as shown by the lack of lethal effect with the same dose. the resistance of 7-day-old birds was aboli ... | 1996 | 8709861 |
| molecular characterization of quail apolipoprotein very-low-density lipoprotein ii: disulphide-bond-mediated dimerization is not essential for inhibition of lipoprotein lipase. | as part of the avian reproductive effort, large quantities of triglyceride-rich very-low-density lipoprotein (vldl) particles are transported by receptor-mediated endocytosis into the female germ cells. although the oocytes are surrounded by a layer of granulosa cells harbouring high levels of active lipoprotein lipase, non-lipolysed vldl is transported into the yolk. this is because vldl particles from laying chickens are protected from lipolysis by apolipoprotein (apo)-vldl-ii, a potent dimeri ... | 1996 | 8713091 |
| functional maturation of neuroendocrine gonadal axis is altered by specific phase relations of circadian neurotransmitter activity in japanese quail. | the present study was designed to ascertain the effects of temporal relationship of circadian neural oscillations on puberty attainment and reproductive growth of japanese quail, coturnix coturnix japonica. serotonin and dopamine precursors (5-hydroxytryptophan, 5-htp and l-dihydroxyphenylalanine, l-dopa; 5 mg/100 g body weight) were injected daily, 8 and 12 h apart in two groups of one-day old chicks, while controls received two daily injections of normal saline. weekly/biweekly observations (b ... | 1995 | 8719179 |
| changes of gtp binding proteins, not neurofilament-associated proteins, in the brain of the neurofilament-deficient quail, "quiver". | a neurofilament (nf)-deficient mutant of the japanese quail was named "quiver", as it showed generalized quivering as a clinical sign. nf consists of three major subunits; low, middle and high. we previously reported that the noradrenaline and 5-hydroxytryptamine content in the neostriatum of the quiver's brain was different from that in the normal quail, although disappearance of the three nf proteins occurred in all areas of the quiver's brain. thus, nf-related proteins may show considerable c ... | 1996 | 8719712 |
| porphyrins as biomarkers of methylmercury and pcb exposure in experimental quail. | chemicals such as heavy metals and polyhalogenated hydrocarbons have a high capacity to interfere with the enzymatic processes responsible for haem biosynthesis. these compounds can produce accumulation in tissues and organs and increased elimination of porphyrins in excreta (andrew et al, 1990). the development of fast and easy analytical methods and the wide variety of biological media in which porphyrins can be detected have suggested their use as biomarkers of environmental pollution (akins ... | 1996 | 8720096 |
| distribution of immunoreactive atrial and brain natriuretic peptides in the heart of the chicken, quail, snake and frog. | the distribution of atrial natriuretic peptide (anp)- and brain natriuretic peptide (bnp)-granules was examined immunohistochemically and ultrastructurally in the hearts of the chicken, japanese quail, japanese rat snake and bull-frog. moreover, natriuretic peptide (np)-granules in the cardiocytes were analyzed by ultrastructural morphometry. immunohistochemically, anp-immunoreactivity (ir) was not detected in any cardiocytes, but bnp-ir was detectable in most atrial and ventricular cardiocytes ... | 1996 | 8726136 |
| evidence for altered structure and impaired mitochondrial electron transport function in selenium deficiency. | selenium (se) deficiency in the experimental models, coturnix coturnix japonica and corcyra cephalonica, resulted in impaired mitochondrial substrate oxidations and lowered thiol levels. studies with respiratory inhibitors confirmed reduced mitochondrial electron transport enzyme activities, especially at cytochrome c oxidase (cox), the terminal segment. enhanced mitochondrial lipid peroxidation in se deficiency was more pronounced in the heart tissue of the quail compared to other tissues. glut ... | 1996 | 8727670 |
| comparison of the ontogenesis of thyroid hormones, growth hormone, and insulin-like growth factor-i in ad libitum and food-restricted (altricial) european starlings and (precocial) japanese quail. | in this study, we compare the ontogenic patterns for thyroid hormones, growth hormone (gh), and insulin-like growth factor-i (igf-i) in altricial european starlings and precocial japanese quail and examine the effects of feed restriction on these species. the most marked difference in development between the altricial and precocial birds was with respect to plasma thyroid hormone patterns. in the starling, circulating concentrations of triiodothyronine (t3) and thyroxine (t4) were very low in em ... | 1996 | 8729940 |
| aspirin promotes hepatic triacylglycerol accumulation in essential fatty acid-deficient japanese quail. | this study was conducted to investigate whether the effect of a high dose of aspirin on hepatic triacylglycerol content is altered by dietary essential fatty acids (efa) in japanese quail. the birds were given an efa-free or efa-adequate [containing 2% (w/w) linoleic acid] diet ad libitum from 7 to 24 days of age. on the final experimental day, the birds received vehicle or 800 mg aspirin/kg body weight intraperitoneally and were killed 4 h subsequently. in birds fed the efa-free diet, hepatic t ... | 1996 | 8738303 |
| efferents from the optic tectum to the brain stem in the japanese quail (coturnix japonica). anterogradely biocytin method. | efferents from the optic tectum to the brain stem in the japanese quail (coturnix japonica) were studied with the anterogradely biocytin method. after injection of biocytin into the ipsilateral optic tectum, labeled terminals were seen in the rotund nucleus (rt), neuropil part of the ventral lateral geniculate nucleus (glnv), principal part of the dorsal lateral geniculate nucleus, lateral part of the dorsolateral thalamic nucleus, triangular nucleus (t), superficial parvocellular nucleus (spc), ... | 1996 | 8741383 |
| effect of age and carcase composition on the onset of sexual maturity in quail under normal feeding regimens. | 1. the effect of age and carcase composition on the onset of sexual maturity was investigated in japanese quail (coturnix coturnix japonica) reared under a normal feeding regimen. 2. at 42 d of age, when the quail had started to lay and hen day production was about 60%, layers were heavier and contained more carcase fat than those that were not laying. 3. the liver and the ovary weight were greater following the onset of sexual maturity than 1 or 2 weeks before (35 and 28 d respectively). 4. car ... | 1995 | 8746978 |
| role of dietary gamma-linolenic acid in liver lipid metabolism in japanese quail. | 1. the importance of linoleic acid (18:2n-6) itself and of dietary gamma-linolenic acid (18:3n-6) as essential fatty acids (efa) in japanese quail were investigated with regard to liver lipid metabolism. experimental diets were made by adding of 0, 2 or 4 g gamma-linolenic acid/kg, or 20 g linoleic acid/kg to an n-6 efa-free diet. from 3 to 6 weeks of age, birds were fed equal amounts of experimental diets. 2. liver weight and lipid content in birds fed the 2 and 4 g gamma-linolenic acid/kg diet ... | 1995 | 8746984 |
| inherited muscular disorder in mutant japanese quail (coturnix coturnix japonica): an ultrastructural study. | ultrastructural study of muscles taken from a mutant (lwc) strain of japanese quail with myotonia showed type 2 fibre atrophy, ring fibre formation, sarcoplasmic masses, and "moth-eaten" fibres. in these abnormal fibres, the most characteristic feature was the loss of interconnection among the myofibrils, mitochondria, and t tubules. apparently normal muscle fibres often showed mild changes, such as proliferation of t tubules and enlarged sarcoplasmic areas with increased glycogen granules and r ... | 1996 | 8762590 |
| effect of egg turning and fertility upon the sodium concentration of albumen of the japanese quail. | 1. the effects of egg turning and fertility upon sodium concentration of albumen of the japanese quail is described for up to 72 h incubation. 2. for incubated eggs the sodium concentration of albumen adjacent to the yolk sac was lower than that from albumen next to the shell. static incubation increased the magnitude of this difference, such that albumen adjacent to the yolk sac was substantially depleted of sodium. this was found at the yolk equator and the yolk vegetal pole of both fertilised ... | 1996 | 8773839 |
| threat-induced behavioural inhibition in japanese quail genetically selected for contrasting adrenocortical response to mechanical restraint. | 1. behavioural and adrenocortical responses to brief mechanical restraint were examined in 28-d-old female japanese quail of two lines which had been genetically selected over several generations for either reduced (ls, low stress) or exaggerated (hs, high stress) plasma corticosterone response to brief immobilisation in a metal box. 2. as expected, quail of the ls line showed lower adrenocortical responses to restraint than did their hs line counterparts. the ls quail also struggled much sooner ... | 1996 | 8773855 |
| experimental hepatitis induced by campylobacter jejuni infection in japanese quail (coturnix coturnix japonica). | to establish an experimental model for vibrionic hepatitis caused by campylobacter jejuni, japanese quails (coturnix coturnix japonica) were inoculated with c. jejuni strains isolated from chicken hepatitis (bl107) and human diarrhea (hp5113). necrotic liver lesions were formed by intra-pancreaticoduodenal vein injection by which the bacteria reached the liver directly via the portal vein, but not by intra-gastric infection. these liver lesions were observed from day 1 to 7 after the infection. ... | 1996 | 8777226 |
| organization of the vagal preganglionic neurons innervating the stomach in the japanese quail (conturinx japonica) double labeling fluorescent method. | cytoarchitectural study indicated that the dorsal motor nucleus of the vagal nerve (nx) was formed by two subnuclei in a coronal section. one of them had large and round neurons, and occupied the dorsal part of the nx (xd). the second one had small and oval neurons, and occupied the ventral part of the nx (xv). the double labeling fluorescent method was performed to determine the organization of preganglionic neurons in the nx innervating different muscles of the quail stomach. injections of nuc ... | 1996 | 8777230 |
| divergent selection for body weight and yolk precursor in coturnix coturnix japonica. 10. response to selection over thirty generations. | japanese quail lines were divergently selected for 30 generations for 4-wk bw (hw, lw) or plasma yolk precursor (hp, lp) as measured by total plasma phosphorus (tpp) at the beginning of lay. the hw, lw, hp, and lp lines were initiated from a randombred control line (r1). in the ninth generation of selection in the hw line, sublines were developed by continuing to select males for increased 4-wk bw whereas females were selected for increased (hw-hp line) or decreased (hw-lp) tpp. individual selec ... | 1996 | 8778720 |
| stretch overload-induced satellite cell activation in slow tonic muscle from adult and aged japanese quail. | stretch overload-induced activation of satellite cells in the anterior latissimus dorsi (ald) muscle was examined in full-grown adult (12 wk old) and aged (90 wk old) japanese quail. 5'-bromo-2'-deoxyuridine (brdu) constant-release pellets (0.22 mg brdu.g body wt-1.day-1) were implanted subcutaneously before weighting the left wing of each bird. nuclei that incorporated brdu were localized by immunohistochemistry after 1 or 2 wk of stretch overload. total fiber number was quantified by counting ... | 1996 | 8779922 |
| divergent selection for body weight and yolk precursor in coturnix coturnix japonica. 11. correlated responses over thirty generations. | japanese quail lines were divergently selected for 4-wk bw (hw and lw lines) and plasma yolk precursor [total plasma phosphorus (tpp); hp and lp lines] for 30 generations. the base population was a randombred control line (r1) that was maintained along with the selected lines. sublines were established from the ninth selected generation of hw by continuing to select males for increased 4-wk bw and selecting females for increased (hw-hp line) or decreased (hw-lp line) tpp. correlated responses ov ... | 1996 | 8786935 |
| immunohistochemical localization of epidermal growth factor in the ovary of the adult japanese quail. | the present study focuses on the immunohistochemical localization of epidermal growth factor in the ovary of the adult japanese quail. immunoreactivity was predominantly found in the smooth muscle cells of blood vessels and of chordae, in granulosa cells of pre-lampbrush follicles, in interstitial cells, in the balbiani complex of pre-lampbrush oocytes, and in ganglia. in developing follicles, immunoreactivity was also detected in some granulosa and thecal cells, in the zona radiata, and especia ... | 1995 | 8787967 |
| the sexually dimorphic medial preoptic nucleus of quail: a key brain area mediating steroid action on male sexual behavior. | about 10 years ago, a sexually differentiated nucleus was identified in the preoptic area (poa) of the japanese quail in the course of studies analyzing the dimorphic mechanisms involved in the activation of sexual behavior. in this species, males exposed to testosterone copulate while females never show this masculine behavior. the present paper reviews anatomical, neurochemical, and functional data that have been collected since that time about the quail dimorphic nucleus. the medial preoptic ... | 1996 | 8788569 |
| substrate specificity of bovine liver cytosolic neutral alpha-mannosidase activated by co2+. | a cytosolic neutral alpha-mannosidase was purified from bovine liver. its molecular weight was found to be 500,000 on gel filtration. the activity of the enzyme toward man alpha 1-6-(man alpha 1-3)man alpha 1-6(man alpha 1-3)man beta 1-4glcnac-pa was increased 26-fold by preincubation with 1 mm co2+. man alpha 1-6(man alpha 1-3)man alpha 1-6(man alpha 1-3)man beta 1-4glcnac was hydrolyzed by the enzyme to man alpha 1-3man alpha 1-6(man alpha 1-3)man beta 1-4glcnac, which was further hydrolyzed t ... | 1996 | 8797102 |