Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| cytoarchitecture and ultrastructure of the avian ectostriatum: afferent terminals from the dorsal telencephalon and some nuclei in the thalamus. | the cytoarchitecture, ultrastructure, and afferent terminals in the ectostriatal complex of the japanese quail were examined. the complex consists of the central core (ec) and peripheral belt (ep). terminals in the complex were categorized into three main groups according to the shape of synaptic vesicles: s (spherical), p (pleomorphic), and f (flat). s terminals are further classified into three types: ss, small terminals which have densely packed vesicles and a long active zone and are presyna ... | 1985 | 2414332 |
| steroidogenesis in ovarian cells of the japanese quail (coturnix coturnix japonica). | the influence of follicular maturation on steroidogenesis and steroid metabolism by isolated japanese quail granulosa and theca cells was examined. when stimulated with lh, granulosa cells of the largest follicle (f1) responded with a sixfold increase over unstimulated progesterone levels, whereas progesterone production in cells of f3 less than doubled even when maximally stimulated. forskolin stimulated progesterone synthesis in both f1 and f3 granulosa cells, but its effect was less pronounce ... | 1985 | 2416631 |
| isolation and partial characterization of japanese quail oviduct mrnas. | the total mrna was prepared from laying quail oviduct and, after denaturation with dimethyl sulphoxide and glyoxal, characterized by agarose gel electrophoresis. the electrophoresis showed that the preparation contains physically homogeneous molecules of mrnas, which migrate as discrete bands. the molecular weights of four major oviduct mrnas coding for conalbumin, ovalbumin, ovomucoid, and lysozyme were determined. the biological activity of mrnas was assayed in a cell-free translation system d ... | 1986 | 2428676 |
| direct administration of chlordecone into japanese quail eggs has persistent effects on conditioned behavior of adults. | chlordecone (0.1 to 10 mg) or corn oil vehicle was injected into japanese quail eggs on day 1 of incubation. higher doses (0.5-10 mg per egg) produced tremor and ataxia at hatching and dose-related decreases in hatchability and survivability. doses lower than 0.25 mg per egg had no effects. gonad weights were not affected at 12 weeks of age. a second study examined the effect of injecting 0.5 mg of chlordecone into the egg on day 1, 3, 7 or 14 of incubation. chlordecone-induced tremor was presen ... | 1987 | 2439960 |
| changes in the distribution of intermediate-filament types in japanese quail embryos during morphogenesis. | we examined the distribution of intermediate filaments in early quail embryos in order to determine whether these cytoskeletal proteins play a role in the epithelial-mesenchymal transitions that commonly occur during embryogenesis, e.g., the separation of neural-crest cells from the neural epithelium. the distribution of cytokeratins, vimentin, and desmin was examined in frozen sections of quail embryos at stages during which dramatic reorganizations of tissues take place. all embryonic tissues ... | 1987 | 2442055 |
| a novel hybrid alpha-tropomyosin in fibroblasts is produced by alternative splicing of transcripts from the skeletal muscle alpha-tropomyosin gene. | a single alpha-tropomyosin gene in the japanese quail exhibits tightly controlled expression of multiple isoforms by an alternative splicing mechanism. we have isolated two full length cdna clones, cc401 and cc402, from quail embryonic myofibers which differentiated in culture. cc402 is the major skeletal muscle alpha-tropomyosin, expressed in adult skeletal muscle and in embryonic muscle culture. cc401 exhibits a novel hybrid primary structure; smooth muscle structure at the carboxyl terminus i ... | 1987 | 2445743 |
| ultrastructural abnormalities in the germinal epithelium of adult quail testes following insecticide chlordecone exposure. | sexually mature male japanese quail were treated with either 40.0 micrograms estradiol-17b injected intraperitoneally or 10 ppm, 40 ppm, 80 ppm, 160 ppm, or 200 ppm chlordecone (kepone) administered in feed for 60 days. animals were sacrificed on days 10, 30, and 60 and the germinal epithelium was measured morphometrically and examined with transmission electron microscopy. estradiol had a minimal effect on testicular morphology whereas there was a dose- and time-dependent reduction in germinal ... | 1988 | 2448915 |
| [methoxydextran as an indicator of gastrointestinal transit in japanese quail]. | the recovery of polyethylene glycol, a substance frequently used as an indicator of the dynamics in the liquid phase of intestinal chyme, is considerably influenced by the presence of trichloroacetic acid in certain applications. the suitability of (methoxy-14c)methoxydextrane as an intestinal indicator in the japanese quail was tested in the study. after the administration of this indicator, the bird expires less than 1% of the substance in form of 14co2. the recovery of labelled methoxydextran ... | 1988 | 2451872 |
| exposure of japanese quail embryos to o,p'-ddt has long-term effects on reproductive behaviors, hematology, and feather morphology. | japanese quail eggs were injected with 1-(2-chlorophenyl)-1-(4-chlorophenyl)-2,2,2-trichloroethane o,p'-ddt(1-10 mg),1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane p,p'-ddt (1-10 mg), or, in one study, 0.5 mg chlordecone dissolved in 50 microliters of corn oil on day 1 of incubation. hatchability was not decreased by o,p'-ddt or p,p'-ddt, as compared to corn-oil-injected controls, but was reduced in progeny of parents injected in ovo with either isomer. tremor was observed for up to 4 days postha ... | 1989 | 2475919 |
| molecular cloning and nucleotide sequence analysis of the putative cdna for the precursor molecule of the chicken lh-beta subunit. | a cdna expression library was constructed from poly(a)+ rna of broiler chicken adenohypophyses using lambda gt11 as a vector. after screening with a rabbit antiserum against chicken lh, a cdna clone (l12) containing a 436 bp insert was obtained. using a subclone of l12 in puc19 (pl12) as the hybridization probe, another cdna clone (lf127) with a 533 bp insert was isolated. the lf127 contained the full-length cdna encoding the putative chicken lh-beta subunit precursor molecule. hybridization of ... | 1989 | 2476156 |
| [heterochromatin regions of the chromosomes of the hen and japanese quail in mitosis and at the lampbrush stage]. | the mitotic and lampbrush chromosomes of the domestic fowl and japanese quail were analysed by fluorochrome staining technique. the lampbrush chromosomes of both the subjects displayed a typical "loop-chromomere" structure. three distinct kinds of loops were distinguished in gallus g. domesticus--normal, telomeric bows, and lumps. the former are distributed along the whole chromosome length. the latter and the bows were observed in subtelomeric and telomeric regions. by dna/rna specific acridine ... | 1989 | 2480013 |
| demethylation of the gene expressing a yolk protein precursor in quail. | japanese quail produce more egg-yolk protein per gram of body weight than chickens do. because cytosine phosphoguanine (cpg) methylation has been reported to correlate inversely with gene activity, the demethylation of cytosine residues in the quail vitellogenin 2 (vg2) gene was assessed as a possible contributing factor. vitellogenin genes are normally transcribed in the liver of female japanese quail that are sexually mature. changes in the methylation pattern of ccgg sites of the quail vg2 ge ... | 1989 | 2482967 |
| mature 98,000-dalton acid alpha-glucosidase is deficient in japanese quails with acid maltase deficiency. | we compared acid alpha-glucosidase of acid maltase-deficient japanese quails, an animal model of human late-onset glycogenosis type ii, with that of normal controls. antibody produced in a rabbit against acid alpha-glucosidase purified from chicken pectoral muscle cross-reacted with that of japanese quails. the presence of a 110k and 98k form of acid alpha-glucosidase was confirmed in normal controls by immunoblotting. however the 98k form was absent in the affected quails. subcellular distribut ... | 1989 | 2506448 |
| [utilization of free and protein-bound lysine in the japanese quail]. | the utilization of dietary lysine for protein synthesis is affected by the digestibility of protein-bound lysine, by its intestinal resorption and by its oxidative catabolism. the approach chosen in this paper enables a comparison of the cumulative effect of these processes on the utilization of free and protein-bound lysine, respectively. the principle of the approach is based on a quantification of the expiration of 14c-labelled carbon dioxide after an oral administration of a diet, which cont ... | 1989 | 2514480 |
| regionalized adaptations and muscle fiber proliferation in stretch-induced enlargement. | the relative contribution of increases in fiber area to stretch-induced muscle enlargement was evaluated in the slow tonic fibers of the anterior latissimus dorsi of adult japanese quails. a weight corresponding to 10% of the bird's body mass was attached to one wing. thirty days of stretch in 34 birds averaged 171.8 +/- 13.5% increase in muscle mass and 23.5 +/- 0.8% increase in muscle fiber length. the volume density of noncontractile tissue increased in middle and distal regions of stretch-en ... | 1989 | 2523374 |
| discovery of noninfectious viral genes complementary to marek's disease herpes virus in quail susceptible to cholesterol-induced atherosclerosis. | japanese quail genetically selected on the basis of atherosclerosis susceptibility were tested for infection by marek's disease herpesvirus (mdv). viral dna was detected in the atherosclerotic aortas of susceptible (sus) quail by the technique of dna hybridization. southern blot analysis demonstrated that restriction mapping of aortic dna was specific and different from that of mdv. screening of quail embryos by dot-blot hybridization detected that mdv dna existed in 100% of sus quail tested. re ... | 1989 | 2537395 |
| avian erythroblastosis virus transforms a novel mast cell-basophil precursor target in the japanese quail. | hematopoietic cells of the japanese quail were transformed by avian erythroblastosis virus in vivo and in vitro. in both circumstances, the infected hematopoietic tissues exhibited a dual oncogenic response of erythroid and mast cell-basophil elements. the erythroid transformants escaped the avian erythroblastosis virus block in differentiation and progressed to hemoglobinization. resulting basophilic cells were morphologically, biochemically, and ultrastructurally identical to mast cell-basophi ... | 1989 | 2539521 |
| a dorsomedial subdivision within the nucleus intercollicularis identified in the japanese quail (coturnix coturnix japonica) by means of alpha 2-adrenergic receptor autoradiography and estrogen receptor immunohistochemistry. | the nucleus intercollicularis is an important site in the control of vocalization in birds. in oscines, a subregion of the nucleus intercollicularis called the dorso-medial intercollicular nucleus appears to play a key role in this process because it receives the majority of the projections from the nucleus robustus archistriatalis and sends most of the projections to the motor nucleus of the hypoglossal nerve. in this paper, we present neurochemical studies of the nucleus intercollicularis in t ... | 1989 | 2546669 |
| melatonin reduction by lithium and albinism in quail and hamsters. | melatonin was measured by radioimmunoassay in several genetic strains of japanese quail. plasma melatonin (pm), measured at the nighttime peak, was highest in wild type quail reared on a diurnal lighting schedule; this pm peak was suppressed in continuous light. albino quail had low melatonin levels, whether reared under diurnal conditions or in continuous light. ocular melatonin was also suppressed in albinos and in dilute mutants. at midday sampling, melatonin was only half as high in albinos ... | 1989 | 2555249 |
| fh3, a v-myc avian retrovirus with limited transforming ability. | we have isolated a new acute avian transforming virus which contains the oncogene myc. this virus, designated fh3, was isolated after injection of a 10-day-old chick embryo with avian leukosis virus. while fh3 shares many properties with other v-myc-containing avian retroviruses, it also has several unique properties. the primary target for transformation in vitro is chicken macrophages; infection of chicken fibroblasts does not lead to complete morphological transformation. fh3 also exhibits a ... | 1989 | 2555545 |
| distribution of glucocorticoid receptor-like immunoreactivity in the brain, and its relation to crf and acth immunoreactivity in the hypothalamus of the japanese quail, coturnix coturnix japonica. | monoclonal antibody (mab49) against the rat liver glucocorticoid receptor was used to evaluate glucocorticoid receptor (gr) immunoreactive structures in the brain of the japanese quail, coturnix coturnix japonica. using the avidin-biotin technique, the immunoreaction was present in the nerve cell nuclei in intact male birds. high density of glucocorticoid receptor-like immunoreactivity was found in the tubero-infundibular area, nucleus paraventricularis, posteromedialis and lateralis hypothalami ... | 1989 | 2557133 |
| an autoradiographic study of alpha 1-adrenergic receptors in the brain of the japanese quail (coturnix coturnix japonica). | the neuroanatomical distribution of alpha 1-adrenergic receptors was studied in japanese quail by quantitative in vitro autoradiography using the specific antagonist [3h]prazosin as the ligand. the presence of saturable (bmax less than 200 fmol/mg protein) high affinity (kd less than 0.12 nm) binding sites was detected by saturation analysis. high concentrations of [3h]prazosin binding sites were detected in the archistriatum/pars ventralis, the hippocampus, the cortex piriformis, the area corti ... | 1989 | 2558805 |
| the dynamics of progesterone output in perifused granulosa layer of the japanese quail (coturnix coturnix japonica): response to adenosine 3',5'-cyclic monophosphate and aminoglutethimide. | a perifusion system has been developed in which the rates of progesterone output of quail granulosa layer in response to steroidogenic stimuli, can be measured under dynamic condition. in response to a continuous perifusion for 8 h with dibutyryl cyclic amp (dbcamp), there was a gradual increase in the rate of progesterone output, which reached a plateau at 4-5 h of perifusion. when progesterone output was inhibited by aminoglutethimide, a reversible inhibitor of the cholesterol side chain cleav ... | 1989 | 2559251 |
| linearity of the accumulation of various dosages of uranium in the major organs of mature male japanese quail. effect of various doses of estradiol-17 beta. | 1. male japanese quail were given 2.20 x 10(-4)-14.53 mg uranium/kg intravenously as uranyl ion (235u label). 2. the relationship between dosage and the 18-hr accumulation of u in leg bones, liver, kidneys and testes was linear. 3. increases in u deposition with increased dosage were approximately 1:1, except for kidneys where 10-fold increases in dosage resulted in 25-fold increases in deposition. 4. estradiol-17 beta increased u deposition in bones by 15-fold thereby providing some protection ... | 1989 | 2566445 |
| effects of the noradrenergic neurotoxin dsp-4 on luteinizing hormone levels, catecholamine concentrations, alpha 2-adrenergic receptor binding, and aromatase activity in the brain of the japanese quail. | previous investigations have established that dsp-4 reliably enhances the activating effects of testosterone on copulatory behavior in adult male quail. in the present study, we wanted to clarify the neurochemical changes that parallel these behavioral effects and to determine whether dsp-4 also affects non-behavioral steroid-dependent sexually dimorphic reproductive processes. we first showed using the palkovits microdissection technique combined with assay by high-performance liquid chromatogr ... | 1989 | 2568873 |
| distribution of alpha 2-adrenergic receptors in the brain of the japanese quail as determined by quantitative autoradiography: implications for the control of sexually dimorphic reproductive processes. | with the use of [3h]p-aminoclonidine (pac), alpha 2-adrenergic binding sites were mapped in the brain of the japanese quail (coturnix coturnix japonica). the sites were labeled with the use of in vitro quantitative autoradiography. special attention was given to areas implicated in the control of sexually dimorphic reproductive processes including sexual behavior. preliminary competition experiments found that [3h]pac binding on tissue sections exhibited a pharmacology appropriate to the alpha 2 ... | 1989 | 2569910 |
| ultradian and circadian co2 emission variations in nocturnal and diurnal animals exposed to a light stimulus. | 1. carbon dioxide emission (vco2) has been continuously recorded in three laboratory animal species (sprague-dawley rats, japanese quail, hartley guinea-pigs) which differ by their nocturnal and diurnal activities. a 100 lux stimulus has been delivered at various time intervals. 2. a regular alternation of 12, 3 or 1.5 hr light (l) and darkness (d) gives vco2 circadian and ultradian rhythms of 24, 6 or 3 hr periods, respectively, in quail and rats. 3. such circadian and ultradian ld rhythms are ... | 1989 | 2574093 |
| effect of cecectomy on water and nutrient absorption of birds. | the effect of the removal of the avian digestive ceca on osmoregulation and on absorption of certain nutrients is reviewed. while data indicate that the ceca have the potential for absorption of a significant quantity of water, several studies have demonstrated that effects of cecectomy on water intake and output are transitory and that compensatory adjustments made within 2 to 3 weeks postsurgery allow cecectomized birds to eat and gain weight normally. however, cecectomized great horned owls e ... | 1989 | 2575133 |
| growth response to chronic beta agonist feeding and mature carcass characteristics of quail (coturnix coturnix japonica) selected for high and low body densities. | a study was conducted to determine the effect of long-term feeding of a beta agonist (cimaterol) on female japanese quail. quail used were from lines selected for high (hd) and low (ld) body density from a randombred population. dietary treatments consisted of 1) the basal feed, 2) the basal feed containing .5 ppm, or 3) 1.0 ppm of the beta agonist. the treatment period for the six experimental groups extended from 14 to 94 days of age. weight gains to 49 days and live weights at 94 days of age ... | 2008 | 2575254 |
| plasma desorption mass spectrometric analysis of glycosylated ovomucoid third domain from japanese quail. | 1988 | 2577843 | |
| mc29 virus-coded protein occurs as monomers and dimers in transformed cells. | the mc29 virus-coded protein p110gag-myc was found exclusively in the nucleus of transformed japanese quail (q8) cells, and time course experiments indicated that the protein had a half-life of about 30 min. when extracts of either q8 or chicken embryo cells infected with mc29 virus were prepared with nondenaturing detergents and then sedimented in sucrose gradients, p110 was found in the fractions expected to contain monomers (5.9s), dimers (9.3s), or mixtures of the two. the same extracts trea ... | 1985 | 2578574 |
| an ultrastructural and histochemical study of the development of secondary palate in japanese quail, coturnix coturnix japonica. | embryonic development of the secondary palate of the japanese quail, coturnix coturnix japonica, was studied. the palatal shelves appeared on day 5 of incubation in a horizontal direction over the dorsal surface of the tongue. subsequently, unlike those in mammals, the opposing palatal shelves do not fuse, and a physiological cleft persists between them. in comparison with the chick, where the palatal shelves do not fuse and the medial edge epithelium (mee) becomes orthokeratinized stratified sq ... | 1985 | 2580854 |
| effects of fish oil on arteriosclerosis in the japanese quail. | the effects of fish oil on the development of arteriosclerosis were assessed using a special susceptible strain (sea) of japanese quail (coturnix coturnix japonica). sixty four quail were randomly divided into two groups and placed on isocaloric and approximately isocholesterolic (2% by weight) diets. group a (control) was supplemented with 10% beef tallow oil, while group b received 10% menhaden fish oil. the birds were sacrificed at 10 weeks (early) and 15-16 weeks (late). based on semiquantit ... | 1989 | 2598217 |
| sexual-discrimination learning in male japanese quail (coturnix coturnix japonica). | we investigated how male japanese quail (coturnix coturnix japonica) learn through extensive social and sexual experience to discriminate between male and female conspecifics. opportunity for heterosexual copulation was important for this learning, but even extensive copulatory opportunity was not sufficient to produce a sexual discrimination; subjects also required exposure to other males. exposure to females after copulatory opportunity did not produce a sexual discrimination but facilitated i ... | 2007 | 2598621 |
| noninvasive heart rate monitoring system for avian embryos based on the ballistocardiogram. | a noninvasive heart rate (hr) monitoring system for avian embryos has been developed based on the ballistocardiogram (bcg). the bcg was detected using a phonograph cartridge as a record of the velocity of the minute ballistic movements of the eggshell, which are generated by recoil and impact of heart contraction and blood ejection. the autocorrelation coefficients (accs) of the detected signal were computed to confirm whether the detected signal contained ballistic movement. an envelope of acc ... | 1989 | 2601467 |
| sodium chloride and water transport in the thin descending limb of henle of the quail. | birds and mammals can produce hyperosmotic urine, but their renal morphology and urine-concentrating mechanisms differ. to elucidate the countercurrent urine concentration mechanism in birds, we examined the structure and transport properties of the descending limb (dl) of henle of mammalian-type nephrons in japanese quail, coturnix coturnix. in the avian renal medulla, a prominent ring of collecting ducts and scattered thick limbs surrounds a core of capillaries and dls. epithelial cells in the ... | 1989 | 2603965 |
| influence of selection for increased body weight on the incidence of leiomyomas and leiomyosarcomas in japanese quail. | leiomyomas and leiomyosarcomas were observed in adult laying hens from lines of japanese quail selected solely (hw) or partly (hw-hp; hw-lp) for increased 4-wk bw and the corresponding randombred control (r1). no neoplasms were observed in a line (lw) selected for decreased 4-wk bw based on observations in one generation. line r1 served as the base population for lines hw and lw and was maintained without conscious selection for any trait, lines hw-hp and hw-lp were sublines of line hw in which ... | 1989 | 2608612 |
| genetic variants of phosvitin in egg yolk of the japanese quail, coturnix coturnix japonica. | phosvitin polymorphism in egg yolk of the japanese quail was found by horizontal polyacrylamide gradient gel electrophoresis. six phenotypes of yolk phosvitin designated a, b, c, ab, ac, and bc were observed in a population of 281 birds. analysis of family data revealed that the phenotypic variation of quail yolk phosvitins was controlled by an autosomal pv locus with three codominant alleles, pva, pvb and pvc. the gene frequencies of pva, pvb and pvc were 0.064, 0.824 and 0.112, respectively. | 1989 | 2610404 |
| aging and sex-related changes in the outer retina of japanese quail. | age-related changes in the outer retina of japanese quail 3 months to 3 years of age have been assessed with light and electron microscopy. a major difference was observed between males and females in the accumulation of lipofuscin in retinal pigment epithelial (rpe) cells. females showed greater densities of lipofuscin granules, larger granules, and more lipofuscin per rpe cell than did males of comparable ages. in addition, a small but significant decrease (14-16%) in photoreceptor nuclear den ... | 1989 | 2612195 |
| [the characteristics of the morphofunctional organization of the lampbrush chromosomes from the oocytes of the rock dove]. | nuclei and chromosomes isolated from growing oocytes of the pigeon c. livia have been studied by light microscope techniques. the pigeon chromosomes in diplotene assume a lampbrush form with a well expressed chromomere-loop organization. the lampbrush chromosomes (lc) with most extended lateral loops were observed in the oocytes 0.5-1.5 mm in diameter. a mean loop contour length on the preparations from oocytes of such a diameter varied within 11-16 mkm. a comparison of the pigeon lc with those ... | 1989 | 2617670 |
| pasteurella multocida infection in japanese quail (coturnix coturnix japonica). | three flocks of japanese quail, approximately 75,000 birds each, experienced acute high mortality beginning at 24 to 28 days of age. gross lesions were absent or were composed of either multifocal small pale areas on livers and spleens or lungs slightly darker in color than normal. histopathology revealed multifocal splenic and hepatic necrosis and interstitial pneumonia. pasteurella multocida, serotype 3,4, was isolated from affected tissues. the quail were successfully treated with chlortetrac ... | 1989 | 2619671 |
| radioiodination of chicken luteinizing hormone without affecting receptor binding potency. | by improving the currently used lactoperoxidase method, we were able to obtain radioiodinated chicken luteinizing hormone (lh) that shows high specific binding and low nonspecific binding to a crude plasma membrane fraction of testicular cells of the domestic fowl and the japanese quail, and to the ovarian granulosa cells of the japanese quail. the change we made from the original method consisted of 1) using chicken lh for radioiodination that was not only highly purified but also retained a hi ... | 1989 | 2624865 |
| chromosome banding and dna replication patterns in bird karyotypes. | the karyotypes of the domestic chicken (gallus domesticus), japanese quail (coturnix coturnix), and griffon vulture (gyps fulvus) were studied with a variety of banding techniques. the dna replication patterns of bird chromosomes, analyzed by incorporation of 5-bromodeoxyuridine (brdu) and deoxythymidine (dt), are presented here for the first time. in particular, the time sequence of replication of the zz/zw sex chromosomes throughout the s-phase was meticulously analyzed. brdu and dt incorporat ... | 1989 | 2630186 |
| lipid peroxides, glutathione peroxidase, prostacyclin and cell cycle stages in normal and atherosclerotic japanese quail arteries. | we have previously shown a negative correlation between lipid peroxide levels and prostacyclin synthesis in plasma and artery of the atherosclerotic rabbit. here we compare the arterial lipid peroxide content, glutathione peroxidase activity, and prostacyclin and thromboxane production in response to exogenous arachidonic acid stimulation, and the cell cycle stages in normal and atherogenic diet-fed quail. lipid peroxides were higher in arteries of the atherosclerotic quail, while glutathione pe ... | 1989 | 2653327 |
| cloning of japanese quail ovalbumin cdna in e. coli. | japanese quail oviduct total cdna was synthesized from total mrna by the classical method, using amv reverse transcriptase, the klenow fragment of dna polymerase i and s1 nuclease. the results of the synthesis of total ss-cdna partially differed from those published for the synthesis of chicken total ss-cdna. the presumed causes of the differences in the complete reverse transcription of mrnacon and incomplete reverse transcription of mrnalys and a large part of mrnaov in our case are discussed. ... | 1989 | 2659390 |
| sexual differentiation of neuroendocrine systems and behavior. | differentiation of the reproductive system occurs in stages, with early development of the gonads and later differentiation of the brain. the physiological mechanisms that are involved in the sequence of events during sexual differentiation have not been clearly understood. however, recent technological advances have made understanding these mechanisms much more accessible. many of these techniques have been used to elucidate the nature of steroid-induced effects on target tissues, hormonal and ... | 1989 | 2674926 |
| genetic studies on pancreatic proteinase in japanese quail. | a genetic variation was found in pancreatic proteinase of japanese quail. in eight bands of proteinase isozymes, the variation of band 5 (presence or absence) was detected among quails. band 5 was identified as a chymotrypsin. the presence and absence of band 5 are controlled by a pair of allelic genes (prt-5a and prt-5a) on an autosomal locus, and gene prt-5a, causing expression of band 5, is dominant to gene prt-5a, a null allele for band 5. zymograms of proteinases and their zymogens were als ... | 1989 | 2695059 |
| variation among lines selected for body size in the fractional rate of degradation of protein and acid protease activity in the muscle of quail (coturnix coturnix japonica). | fractional rates (%/day) of degradation of muscle protein were determined by measuring the output of nt-methylhistidine (nt-mh) in the excreta at 2 and 10 weeks of age in three lines of quail, a random-bred line and two lines selected for body size, one for increased and the other for decreased size. in all lines, fractional rates of degradation of muscle protein at 2 weeks of age were higher than those at 10 weeks of age. the fractional rate of degradation at 2 weeks of age was highest for the ... | 1989 | 2695061 |
| contextual conditioning and the control of copulatory behavior by species-specific sign stimuli in male japanese quail. | three experiments were conducted to identify species-specific sign stimuli sufficient to elicit copulatory behavior in male japanese quail and to determine how learning is involved in the control of behavior by these sign stimuli. in experiment 1, sexually experienced subjects were tested for copulatory behavior with a live female quail and with a model consisting of a female quail's head and neck mounted in front of a foam pad. comparable levels of copulatory behavior were observed in the two t ... | 1989 | 2708940 |
| effects of brefeldin a on the synthesis and secretion of egg white proteins in primary cultured oviduct cells of laying japanese quail (coturnix coturnix japonica). | we investigated the effect of brefeldin a (bfa) and monensin on the secretion of egg white proteins in primary cultured oviduct cells. monensin inhibited the secretion of egg white proteins, but this drug also caused morphological changes of the cells and inhibited their protein synthesis. bfa inhibited protein secretion without any remarkable morphological changes of the cells and without significant inhibition of protein synthesis. in the presence of bfa at 1 microgram/ml, only 10% of synthesi ... | 1989 | 2713420 |
| [genetic parameters of body weight, muscle weight and skeletal characteristics in japanese quail]. | heritability, phenotypic and genetic correlations of body weight, muscle weight and skeletal characteristics of japanese quail males at 8 weeks of age were investigated to obtain basal information on breeding and on genetic monitoring by morphometrical methods. for this study, 221 male progenies were used. measurements were taken on body weight, muscle weight and four kind of skeletal characteristics (skeletal weight, skeletal length, skeletal width and skeletal height). heritability estimates w ... | 1989 | 2714377 |
| genetic parameters of egg characteristics in japanese quail. | heritability, phenotypic and genetic correlations of egg characteristics of japanese quail were investigated to obtain basal information on breeding, strain identification and genetic monitoring. for this study, 3230 eggs produced from 323 female were used. measurement were taken on egg weight, yolk weight, albumen weight, shell weight, egg shape index, albumen height, specific gravity, shell thickness, shell strength and yolk color. heritability estimates of egg characteristics were high and ra ... | 1989 | 2714378 |
| immunohistochemical study of ontogeny and phylogeny of a terminal n-acetylglucosamine cluster antigen. | in this work an immunohistochemical method was used to study the ontogeny and phylogeny of a terminal n-acetylglucosamine (glcnac) cluster antigen which is an epitope(s) of highly branched n-linked oligosaccharides terminating in glcnac residues. the ontogenic studies demonstrated that expression of the antigen is developmentally regulated in lymphocytes, epithelial cells of endodermal origin and kidney mesangial cells of the chicken. the antigen was found in several other avian species studied, ... | 1989 | 2715042 |
| neuroanatomical localization of sex steroid-concentrating cells in the japanese quail (coturnix japonica): autoradiography with [3h]-testosterone, [3h]-estradiol, and [3h]-dihydrotestosterone. | steroid autoradiography was undertaken to determine the neuroanatomical loci which might be involved in the activation of steroid-sensitive behaviors in the japanese quail (coturnix japonica). male and female quail were either surgically gonadectomized or photically regressed and implanted with androgen or estrogen to restore normal sexual and courtship behavior. after gonadectomy or implant removal, each quail was injected with 250 microci of [3h]-testosterone (3h-t), [3h]-estradiol (3h-e2), or ... | 1989 | 2716950 |
| localization of aromatase in synaptosomal and microsomal subfractions of quail (coturnix coturnix japonica) brain. | the subcellular distribution patterns of aromatase, 5 alpha- and 5 beta-reductase in the hypothalamus/preoptic area of japanese quail were studied using standard methods of centrifugation, and fractional constituents were identified by marker enzymes. aromatase was concentrated 8-fold in the 100,000 g pellet (p3) along with a 3-fold enrichment in the microsomal marker nadph-cytochrome c reductase (ncr) a result consistent with glandular tissues. in addition, aromatase was enriched 2-fold in the ... | 1989 | 2716959 |
| estrogen receptors in quail brain: a functional relationship to aromatase and aggressiveness. | estradiol (e2) mediates many of the activational effects of testosterone (t) on masculine reproductive and aggressive behaviors. using japanese quail (coturnix coturnix japonica) as an animal model, together with a newly devised procedure for quantifying aggressiveness, we recently showed that aggression is e2-dependent and that individual differences in behavioral intensity are correlated with aromatase in the hypothalamus/preoptic area (hpoa). in this study we characterized estrogen receptors ... | 1989 | 2720027 |
| activation of sexual behavior by implantation of testosterone propionate and estradiol benzoate into the preoptic area of the male japanese quail (coturnix japonica). | intracranial implantation of minute pellets of gonadal steroids was performed to determine neuroanatomical loci at which steroids activate sexual behavior in the japanese quail (coturnix japonica). in this species, systemic treatment of castrated males with either testosterone propionate (tp) or estradiol benzoate (eb) restores male-typical copulatory behavior (head grabbing, mounting, and cloacal contact movements). in addition, eb activates female-typical receptive behavior (crouching). adult ... | 1989 | 2744741 |
| developmental and muscle-specific regulation of avian fast skeletal troponin t isoform expression by mrna splicing. | we have investigated the developmental regulation of the avian fast skeletal muscle troponin t (tntf) gene of the japanese quail. sequence analysis of troponin t mrna, cdna clones, and a genomic dna segment demonstrate that the avian, fast skeletal tntf protein isoforms are produced from a single gene. this tntf gene is expressed in skeletal muscle, but not in adult cardiac muscles or in non-muscle tissues. in addition to known tnt isoforms, three new isoforms of tnt are described. these isoform ... | 1989 | 2745456 |
| heritable susceptibility to environmentally induced glaucoma in several mutants of japanese quail. | we compared albino (ai), dilute (aid), and wild-type (ai+) quail in their ocular responses to continuous light, the rearing condition that brings on light-induced avian glaucoma (liag) in domestic chickens. at age 3 months, all quail kept under 24l/od showed the retarded corneal growth and corneal flattening characteristic of liag. unlike chickens, quail did not suffer pathological eye enlargement during the early growing period. however, by 6 months of age, 24l/od albinos showed an almost 20% i ... | 1989 | 2754233 |
| metabolism of decoquinate in chickens and japanese quail. | thirty mature chicken hens and 40 mature japanese quail hens were used in an experiment to compare pathways of decoquinate (dq) excretion. labelled dq was injected into chickens (.5 microci via wing vein puncture) and quail (.25 microci via cardiac puncture) on day 0. blood was sampled at 0, 1.5, 3, 6, 9, 12, 24, and 48 h postinjection. eggs and excreta of chickens and quail were collected for 28 and 14 days, respectively, and analyzed for 14c. six chickens and eight quail were sacrificed prior ... | 1989 | 2755893 |
| studies on the fate of flocoumafen in the japanese quail (coturnix coturnix japonica). | 1. 14c-flocoumafen, administered to japanese quail as a single oral or i.p. dose, was rapidly and extensively eliminated in excreta; most was eliminated within 24 h. extensive metabolism of the rodenticide was seen, with at least 8 metabolites detected; unchanged flocoumafen comprised 9% dose. the elimination kinetics and metabolic profiles were qualitatively similar after oral and i.p. dosing. 2. the major metabolites (60% dose) were labile to beta-glucuronidase, liberating aglycones with ident ... | 1989 | 2756717 |
| [cellular specificity of lectin binding in the kidney of the quail (coturnix coturnix japonica)]. | the goal of this study was to demonstrate the distribution of glycoproteins in the various segments of the japanese quail nephron, using lectins labeled with hrp or fitc. each one of the six labeled lectins had a characteristic distribution pattern along the nephron. the study shows that lectins are useful markers for certain nephron segments or for cell types in certain segments of the renal tubules. pna marks the thin portion of the medullary loop, dba marks the thick portion; it is thus possi ... | 1989 | 2757236 |
| preliminary observations on the fine structure of the medial preoptic nucleus in coturnix japonica. | the organization of the sexually dimorphic medial preoptic nucleus of the japanese quail was studied at ultrastructural level. the region was characterized by clusters of parvocellular neurons showing a rich supply of axo-somatic synapses and a peculiar distribution of synthetic (rough endoplasmic reticulum) and secretory (golgi complexes) structures. further analyses are required to relate these features with sex, hormonal status and sexual behaviour of quail. | 1989 | 2757823 |
| growth factor activity in luminal fluids from the male reproductive tract of the ram, rat, tammar wallaby (macropus eugenii) and japanese quail (coturnix coturnix japonica). | growth factor activity in luminal fluids from the male reproductive tract was assayed by measuring the stimulation of [3h]thymidine incorporation into balb/c 3t3 fibroblasts. the potency of fluids from the rete testis of the rat, ram, tammar wallaby and japanese quail was much the same. however, about 90% of the activity in fluid from the rete testis of the rat and tammar was lost during its passage through the epididymis. | 1989 | 2760881 |
| a role of melatonin in the initial stage of photoperiodism in the japanese quail. | to estimate whether melatonin is involved in gonadal activity in the male quail, the dynamics of plasma melatonin at an early stage of the photoperiodic response were investigated. nocturnal levels of melatonin were manipulated by treatment with anti-melatonin (anti-m). by means of 4 additional hours of photic stimulation of the brain (provided by a red light-emitting diode inserted through the back of the head) after the environmental lights (8l:16d, lights-on, 1000 h) were turned off, the elev ... | 1989 | 2765617 |
| promotive effect of elastase on regression of aortic atherosclerosis in cholesterol-fed quails. | in order to test the anti-atherosclerotic function of elastase, 44 japanese quails, 40 d of age, were used in this study. an atherogenic diet contained 15% corn oil and 2% cholesterol. elaszym was orally administered at a dose of 6,000 el units per kg body weight 3 times a week for 3 months. after 3 months feeding the atherogenic diet was discontinued. moderate hypercholesterolemia and marked lipid-rich aortic lesions were noted in the group which was fed the atherogenic diet for 3 months. the t ... | 1989 | 2767211 |
| immunological-chromatographic analysis of lysozyme variants. | immunological-chromatographic analysis (ica) was used to evaluate the cross-reactivities of eight lysozyme variants with five different immobilized monoclonal anti-hen-egg-white lysozyme antibodies. ica is a dual-column high-performance liquid chromatography-based method in which an immunoaffinity and a conventional analytical column are coupled with a switching valve. antigens are first captured on the affinity column and then desorbed and concentrated on the second column, where they are separ ... | 1989 | 2777977 |
| lead influences on physiological and growth responses in coturnix coturnix japonica selected for large body weights. | coturnix coturnix japonica, selected for large adult weight (fatty), were 40% heavier than random-bred controls (rb). given dietary lead (50 or 500 mg/kg) from hatching, fatty (10%) showed a smaller decrease in body weight than did rb (22%) at 6 weeks. egg production was lower in fatty, and lead (500 mg/kg) caused a greater suppression in fatty. lead added to the diet of fatty and rb control diets at 7 weeks into egg production caused a 15% decrease in rb production but only a transitory decreas ... | 1989 | 2792056 |
| testosterone implanted in the preoptic area of male japanese quail must be aromatized to activate copulation. | intracranial implantation of minute pellets of gonadal steroids was combined with aromatase inhibitor treatment to determine if aromatization within the preoptic area (poa) is necessary for androgens to activate sexual behavior in the japanese quail (coturnix japonica). in this species, implantation of pellets of testosterone propionate (tp) or estradiol benzoate (eb) in the poa of castrated males restores male-typical copulatory behavior. in experiment 1, adult male castrated quail were implant ... | 1989 | 2793083 |
| mitogen stimulation affects contractile protein mrna abundance and translation in embryonic quail myocytes. | in cultures of differentiated, fusion-blocked muscle cells obtained from embryonic japanese quail (coturnix coturnix japonica), mitogen stimulation leads to an immediate reduction in the rates of synthesis of skeletal muscle myosin heavy chain (mhc) and alpha-actin. the molecular mechanisms responsible for this downregulation were examined. the cellular abundances of the alpha-actin and mhc mrnas were affected differently by mitogen stimulation; alpha-actin mrna abundance declined by an amount w ... | 1989 | 2796987 |
| [specific immunoglobulins from egg yolks of japanese quail immunized with influenza and hiv-1 viruses]. | 1989 | 2806062 | |
| quail (coturnix japonica) protamine, full-length cdna sequence, and the function and evolution of vertebrate protamines. | using the chicken protamine gene as a probe, we have isolated and sequenced several positive clones from a quail testis cdna library which reveal the complete sequence for the quail protamine cdna. the predicted amino acid sequence for the quail protamine contains the n-terminal tetrapeptide aryr present in the n-terminal region of the mammalian protamines as well as several conserved motifs and arginine clusters. in addition the size of the quail protamine (56 amino acids) is closer to that of ... | 1989 | 2808336 |
| sex and storage affect cholinesterase activity in blood plasma of japanese quail. | blood plasma cholinesterase (che) activity is a sensitive indicator of exposure to organophosphorus and carbamate insecticides. effects of sex and storage of samples were studied as sources of variability by treating breeding japanese quail (coturnix japonica) with 3 mg of dicrotophos or carbofuran per kg of body weight and comparing blood plasma che activities for samples collected at 1 hr postdosage and assayed fresh, after 1 and 2 days of refrigeration (4 c), and after 1, 7 and 28 days of fre ... | 1989 | 2810558 |
| influence of exogenous prostaglandin e2 and stress on circulating corticosterone concentrations in coturnix. | the effects of exogenous prostaglandin e2 (pge2) injections and stress on circulating corticosterone (b) levels in coturnix were determined. adult japanese quail (coturnix coturnix japonica) were subjected to one of four treatments: 1) injected with vehicle; 2) injected with pge2; 3) immobilized for 10 min, followed by vehicle injection; or, 4) immobilized for 10 min, followed by pge2 injection. injections were given intraperitoneally, and blood samples were collected by cardiac stab at 15-min p ... | 2009 | 2813251 |
| distribution of estrogen receptors in the brain of the japanese quail: an immunocytochemical study. | the distribution of estrogen receptors in the quail brain was investigated by immunocytochemistry using the monoclonal antibody h222spy raised against estrogen receptors that had been isolated from a human mammary tumor. nuclei which contained cells labeled for estrogen receptor were identified in the telencephalon, diencephalon and mesencephalon. in particular, a high percentage of labeled cells was observed in the lateral septum, the nucleus accumbens, the preoptic medial nucleus, the supraopt ... | 1989 | 2819436 |
| changes in progesterone production in granulosa cells during the ovulatory cycle of the japanese quail (coturnix coturnix japonica). | the influence of follicular maturation on progesterone production by isolated granulosa cells of the japanese quail was examined. after determination of the concentrations of ovine lh (olh) and dibutyryl cyclic amp for the maximum response, the amount of progesterone produced during incubation at 40 degrees for 3 hr with or without olh or dibutyryl cyclic amp was measured in granulosa cells isolated from follicles at 71 to 1 hr before ovulation. when cells were stimulated with olh, we found a ma ... | 1987 | 2822528 |
| detection of specific dna segments of marek's disease herpes virus in japanese quail susceptible to atherosclerosis. | genetically selected lines of japanese quail, highly susceptible (sus) and resistant (res) to atherosclerosis, were used to study the possible involvement of marek's disease herpes virus (mdv). an ecori gene library of mdv cloned in pbr328 was used to prepare the 32p-dna probe in dot-blot and southern blot hybridizations to detect the presence of mdv dna sequence in the aorta, embryo and other tissue specimens. the viral dna was found present in the aorta of sus quail and it increased with the s ... | 1987 | 2825727 |
| in vitro differentiation of the japanese quail secondary palate. | differentiation of the japanese quail secondary palate was studied in vitro. results indicated that the medial edge epithelia (mee) of quail were capable of full differentiation in vitro from a very early age. in contrast to in vitro mammalian palatal development, the quail palatal processes never fused. the cells of the mee in the quail continued to divide, and the cyclic adenosine monophosphate (amp) levels in the quail palatal tissues remained constant during development. in contrast to in vi ... | 1988 | 2830057 |
| restriction analysis of additional "non-producing" cell clones obtained after transformation of japanese quail fibroblasts with viruses rescued from cryptovirogenic h-19 cells. | the proviral structure of two transforming viruses rescued from cryptovirogenic h-19 hamster cells harbouring the ltr, v-src, ltr proviral structure was analysed by restriction mapping. it was established that the rescued g8 virus keeps the same restriction pattern as that observed in the cryptic h-19 provirus and that it is integrated into the cell genome at a different position characteristic of each "non-producing" (np) cell clone. in these features it corresponds to the previously described ... | 1987 | 2830149 |
| transaminase and phosphomonoesterase activities in different regions of the oviduct epithelium of laying japanese quail (coturnix coturnix japonica). | 1. activities of alkaline (alp) and acid phosphomonoesterases (acp) and aspartic (got) and alanine (gpt) aminotransferases in the glandular epithelia of the infundibulum, magnum, isthmus and shell gland of the laying quail were measured when the egg was in the shell gland. 2. the activities of all the enzymes were significantly (p less than 0.001) greater in shell-gland than in isthmus and magnum. 3. gel-electrophoretic analysis of proteins showed that the magnal epithelia had the same proteins ... | 1987 | 2833336 |
| indexes of vitamin d deficiency in japanese quail embryos. | effects of vitamin d deficiency (-d) on mineral homeostasis were investigated in japanese quail embryos. the -d embryos from 1,25(oh)2d3-fed hens became progressively calcium deficient, as documented by hypocalcemia and reduced calcium accumulation by the skeleton, yolk sac, and allantoic fluid. plasma phosphate was progressively elevated between days 11 and 15. increased calcium accumulation by the skeleton, yolk sac, and allantoic fluid occurred between days 12 and 15 in +d embryos. phosphate ... | 1988 | 2834961 |
| development of thyroid function and its pituitary control in embryonic and hatchling precocial japanese quail and altricial ring doves. | we compared the developmental pattern of thyroid function and its pituitary control in precocial japanese quail and altricial ring doves. we measured thyroid hormone (th) content of thyroid glands (tg), th concentrations in the serum, relative pituitary gland thyrotropin (pg-tsh) content, and the ability of the tg to respond to exogenous tsh as indicated by increases in tg-3',5'-monophosphate (camp) content or in serum th concentrations. in embryonic quail there is considerable maturation of thy ... | 1988 | 2836260 |
| steroid secretion by ovarian cells of the japanese quail (coturnix coturnix japonica). | mixed cell preparations (theca plus granulosa) prepared from the hierarchy of follicles of quails ovaries were incubated under defined conditions with or without the addition of ovine luteinizing hormone (olh), ovine follicle stimulating hormone (ofsh), theophylline, cycloheximide, or dibutyryl cyclic adenine monophosphate (db camp); or in the presence of androstenedione or testosterone as aromatizable substrate. steroids secreted into the medium during the 4-hr incubation period were assayed by ... | 1988 | 2848745 |
| [avian celo adenovirus as a possible contaminant in cell cultures of japanese quail embryos]. | avian adenovirus celo was found to replicate poorly in japanese quail embryos (jqe) and cell cultures of them. the infectious process in these systems was latent. the antigen of adenovirus celo in jqe cell culture was detectable by the fluorescent antibody method (fam) within the first 24-72 hours after inoculation as fluorescent cytoplasmic granules. subsequently, fluorescence of nuclei and macrophage cytoplasm was observed. the results indicate that jqe and their cell cultures are not contamin ... | 1988 | 2854677 |
| adrenal responses to chronic and acute water stress in japanese quail coturnix japonica. | water deprivation (wd) resulted in increased serum osmotic pressure (op) and decreased body weight (wb); adrenal aldosterone content did not change. adrenal corticosterone content tended to be elevated during early wd, indicating a stress response, but tended to decrease after seven days of wd, suggesting adrenal fatigue. during water restriction (wr), after the period of weight loss, adrenal corticosterone content and serum op were elevated. as the birds began to gain weight, aldosterone levels ... | 1985 | 2859951 |
| characteristics of cellular and humoral immune responses after immunization with different rabies vaccines. | three rabies vaccines were compared: 1. the fermi type vaccine, a phenol-treated suspension of brain tissue from infected sheep; 2. a virus grown in sheep brain, purified from the contaminating material to 85-90% and inactivated with beta-propiolactone; 3. and the mniip-74 strain cultured in japanese quail embryo cells and inactivated with beta-propiolactone. a single immunization of mice with any of the preparations resulted in about 50% inhibition of splenocyte migration after 2 days; by day 1 ... | 1985 | 2860797 |
| peripheral blood in the japanese quail (coturnix coturnix japonica) in acute poisoning by different insecticides. | the purpose of this study was to examine the effect of chlorphenvinphos and foschlor on the erythrocytes and leucocytes in the japanese quail (coturnix coturnix japonica). it was found that there is no decided change in the number of erythrocytes after ingesting chlorphenvinphos, whereas foschlor significantly reduces rbc content. the effect of the two pesticides is shown by an increase in reticulocytes and erythroblasts. chlorphenvinphos significantly reduces, but foschlor increases, thrombocyt ... | 1985 | 2861051 |
| immunocytochemical localization of the pancreatic islet cells in the japanese quail, coturnix coturnix japonica. | 2010 | 2863411 | |
| hematological response of japanese quail to acute hemorrhagic stress. | hematological and serum biochemical changes in response to hemorrhagic stress were determined in both sexes of juvenile and adult coturnix coturnix japonica over 3 day period following a mechanical hemorrhage of 30% of the calculated total blood volume. there was an initial shift posthemorrhage towards greater numbers of more mature erythrocytes and fewer circulating reticulocytes. reticulocytosis was indicated 48-72 hr posthemorrhage. glucose and lactic acid dehydrogenase levels increased after ... | 1985 | 2864183 |
| hatch weight selection: effect on post-hatch growth in the japanese quail (coturnix coturnix japonica). | the post-hatch growth of japanese quail, weight selected at hatch, was investigated. the quail were grouped according to hatch weight as follows: group i, 5.5-6.2 g; group ii, 6.3-7.0 g; and group iii, 7.1-7.6 g. group iii quail were 25 and 12% heavier at hatching than group i and ii quails, respectively, and reached a mature body weight which was 38 and 12% heavier than group i and ii quails, respectively. gompertz growth parameters were not different in any of the groups. feed and water consum ... | 1985 | 2864190 |
| interferonogenicity of rabies vaccines as related to their therapeutic and prophylactic activities. | non-interferonogenic rabies vaccine prepared from a virus grown in sheep brain and devoid of neuroallergenic factor and an interferonogenic vaccine from the same virus strain cultured in japanese quail embryo cells have been compared. in mouse experiments both preparations appeared to have identical therapeutic and prophylactic efficacy. it seems that interferonogenicity of rabies vaccines cannot be used as a criterion of their prophylactic or therapeutic effects. the effectiveness of exogenous ... | 1985 | 2866692 |
| hepatic biotransformation in the buzzard (buteo buteo) and the japanese quail (coturnix coturnix): effect of pcbs. | hepatic biotransformation was studied in microsomal (cytochrome p-450-dependent monooxygenase activities) and cytosolic (glutathione s-transferase activities) fractions from japanese quail (coturnix coturnix) and buzzard (buteo buteo). monooxygenase activities were not very different apart from a high 7-ethoxycoumarin de-ethylase activity in quail as compared to buzzard. glutathione s-transferase activities were higher in quail than in buzzard. dp5 (a commercial mixture of pcbs containing 50% ch ... | 1985 | 2866918 |
| interspecific cell markers and cell lineage in birds. | a cell marking technique based on the structural differences existing between the interphase nucleus in two closely related species of birds, the chick and the japanese quail, is described. in all embryonic and adult cell types of the quail, a large mass of heterochromatin is associated with the nucleolus making quail and chick cells easy to identify at the single cell level after application of any dna-specific staining procedure and also at the electron microscope level. this method has been l ... | 1985 | 2869526 |
| depression of plasma luteinizing hormone concentration in quail by the anticholinesterase insecticide parathion. | to examine the effects of parathion on basal plasma luteinizing hormone (lh) concentration, male japanese quail (coturnix japonica) were orally intubated with 0, 5 or 10 mg/kg parathion and sacrificed after 4, 8 and 24 hr. at the 5 mg/kg dose, plasma lh levels were reduced at 4 and 8 hr, but returned to control values by 24 hr. brain acetylcholinesterase activity was substantially reduced by 10 mg/kg parathion (52, 75 and 37% inhibition at 4, 8 and 24 hr, respectively) and plasma lh concentratio ... | 1986 | 2872014 |
| the nature of thyrotropin stimulation of thyroid function in japanese quail: prolonged thyrotropin exposure is necessary to increase thyroidal 125i uptake. | single injections of thyrotropin (tsh) increase serum t4 and thyroidal 32p uptake but not thyroidal 125i uptake regardless of dosage, exposure time or age. chronic tsh exposure, with 3 or more days of injection, does increase thyroidal 125i uptake. studies using iodine (i) supplementation indicated that the increased thyroidal radioiodine uptakes seen with chronic tsh administration were not due to an i deficiency in the thyroid resulting from high hormone release. labeled and unlabeled experime ... | 1986 | 2878775 |
| response of japanese quail to hemorrhagic stress after exposure to microwave radiation during embryogeny. | coturnix coturnix japonica eggs were exposed to 2.45 ghz continuous wave microwave radiation at an incident power density of 5 mw/cm2 (sar = 4 mw/g) during the first 12 days of embryogeny. after hatching, hematologic changes in response to an acute hemorrhage were measured in exposed and nonexposed (control) juveniles and adults of both sexes. reticulocyte numbers and percentages were depressed below control numbers at 24 hr postphlebotomy in exposed adult females. lymphocyte numbers were depres ... | 1986 | 2879671 |
| immunocytochemical localization and spatial relation to the adenohypophysis of a somatostatin-like and a corticotropin-releasing factor-like peptide in the brain of four amphibian species. | the distribution of somatostatin (srif) - and corticotropin-releasing factor (crf)-like - immunoreactive material was studied in the brain of four amphibian species (ambystoma mexicanum, pleurodeles waltlii, xenopus laevis, rana ridibunda) by use of immunocytochemistry. a wide network of srif-immunoreactive fibers and numerous perikarya were observed in all amphibians examined, with a dense accumulation of nerve endings in the external layer of the median eminence (elme). in the representatives ... | 1987 | 2880668 |
| effect of caponization on central nervous system monoamines in the japanese quail. | depletion of brain regional norepinephrine (ne), dopamine (da) after alpha methyl-paratyrosine (amt), and serotonin (5ht) were measured in intact and caponized adult male japanese quail (coturnix coturnix japonica). telencephalon, diencephalon, and cerebellum da was depleted by amt treatment, but brain stem was not affected. amt-induced depletion of ne was greatest in telencephalon, diencephalon, and brain stem of capons. neither caponization nor amt affected brain regional 5ht. the results from ... | 1987 | 2881688 |
| manifestations of social stress in grouped japanese quail. | physiological manifestations of social stress in stable and unstable (resident and visitor) pairs of adult male japanese quail (coturnix coturnix japonica) were compared after 7, 14, 21 and 28 days of regrouping. unstable pairs had reduced body and relative testes (mg/100 g) weights. plasma cholesterol was increased significantly in unstable pairs, and adrenal cholesterol was reduced significantly by daily regrouping of unstable pairs. twelve consecutive days of acth treatment (2, 4 or 8 iu/100 ... | 1987 | 2881689 |
| agonistic behavior and neurochemistry in grouped japanese quail. | aggressive behavior and whole brain neurochemistry were measured in stable and unstable pairs of male coturnix coturnix japonica. aggressive pecking peaked on day 5 of the daily regrouping regime and returned to a basal level on day 14. aggressive behavior was associated with increased brain norepinephrine (ne), dopamine (da), and acetylcholinesterase (ache) in unstable pairs. habituation (12-15 days) and da response to daily regrouping and inanition were inversely related in unstable and stable ... | 2007 | 2881690 |