Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| oral and intramuscular toxicity of inorganic and organic mercury chloride to growing quail. | the lethal toxicity of inorganic (hgcl2) and organic (ch3hgcl) mercury chloride was compared for coturnix (japanese quail, coturnix japonica) of different ages from hatch through adulthood by single-dose acute oral and intramuscular injections and by a 5-d dietary trial. sublethal mercury toxicity was studied by evaluation of plasma and brain cholinesterase activity. ch3hgcl was more toxic than hgcl2 in all tests at each age tested. ld50s consistently increased over the first 4 wk for both acute ... | 1987 | 3806696 |
| reproduction of japanese quail after microwave irradiation (2.45 ghz cw) during embryogeny. | japanese quail (coturnix coturnix japonica) embryos were irradiated continuously in ovo with 2.45-ghz continuous wave radiation during the first 12 days of embryogenesis at an incident power of 5 mw/cm2 and a specific absorption rate of 4.03 mw/g. the internal temperature of irradiated and nonirradiated (sham) eggs was 37.5 +/- 0.3 degrees c, which is the optimum temperature for incubating quail eggs. at 35 days after hatching irradiated and sham-irradiated males were paired with irradiated or s ... | 1987 | 3580002 |
| blood volume recovery in hemorrhaged japanese quail. | 1. blood volume and plasma biochemical changes and feed and water consumption in response to a hemorrhage by phlebotomy of 30% of the calculated total blood volume with and without replacement of blood volume with physiological saline were determined in juvenile male coturnix coturnix japonica. 2. plasma protein and osmolality decreased rapidly posthemorrhage and did not recover by 72 hr posthemorrhage. 3. plasma glucose, na+ and k+ increased within 1 hr postphlebotomy. plasma na+ returned to no ... | 1987 | 2889580 |
| isolation and characterization of single myocardial cells from the quail, coturnix coturnix japonica. | 1. the enzymatic cell isolation technique was applied to the bird heart resulting in myocytes of which 10-50% maintained their spindle-shaped morphology, excluded the vital dye, evans blue and tolerated physiological concentration of ca2+ ions. 2. the length of spindle-shaped myocytes was on average 289 +/- 7 microns, and the maximum width was 10.2 +/- 0.3 microns. the mean length of the sarcomeres was 2.18 +/- 0.03 microns. 3. in electron micrographs the fine structure of the spindle-shaped myo ... | 1987 | 2889569 |
| hematological response of hemorrhaged japanese quail after blood volume replacement with saline. | 1. hematological responses to hemorrhage by phlebotomy with and without replacement of blood volume with saline were measured in juvenile and adult male coturnix coturnix japonica. 2. recovery of total peripheral erythrocyte numbers and total peripheral leukocyte numbers occurred within 72 hr postphlebotomy in both treatment groups. 3. saline replacement of blood volume following hemorrhage increased the total numbers and differential percentages of circulating reticulocytes at 72 hr postphlebot ... | 1987 | 2887392 |
| effect of cage density and rank in peck order on brain regional monoamines in adult male coturnix coturnix japonica. | 1. in adult male coturnix coturnix japonica neither norepinephrine (ne) nor serotonin (5ht) in various brain regions were affected by caging density (174 cm2-8/cage; 348 cm2-4/cage; 696 cm2-2/cage). dopamine (da) in diencephalon was elevated in high density cages. 2. peck order rank was assigned on the basis of feather distribution on head, neck and back and lesions on head and back. 3. upper strata peck order rank was associated with significantly lower levels of brain regional ne and da compar ... | 1987 | 2886268 |
| hematology of japanese quail selected for high or low serum corticosterone responses to complex stressors. | blood was collected from random-bred male coturnix coturnix japonica and from quail selected genetically for high or low serum corticosterone responses to complex stressors after chronic exposure to short daily photoperiods and after exposure to long photoperiods. when compared to the low response quail, high response quail exhibited increased mean cellular hemoglobin values, reticulocyte numbers and heterophil percentages, and decreased monocyte and eosinophil numbers after exposure to long pho ... | 1987 | 2881699 |
| 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 |
| 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 |
| quantification and characterization of metallothioneins in tissues of lower vertebrates and invertebrates. | metallothionein (mt) and the related metal-binding proteins in tissues of lower vertebrates and invertebrates were isolated by gel filtration chromatography (conventional liquid and high performance liquid chromatography). the metal-binding proteins including mt were detected by determining the metals bound to the proteins by atomic absorption spectrophotometry. this analytical procedure was recommendable as the first step to characterize unknown metal-binding proteins in diverse living bodies. ... | 1987 | 2959515 |
| leukocyte numbers during the humoral and cell-mediated immune response of japanese quail after microwave irradiation in ovo. | 1. 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, leukocyte differential changes were measured in response to an injection with alectoris graeca chukar red blood cells (crbc) and in response to a phytohemagglutinin (pha) injection in irradiated and nonirradiated (sham) quail of both sexes. 2. microwave irradiation did not affect anti-crbc h ... | 1987 | 2886278 |
| mycoplasma species isolated from six avian species. | mycoplasmas were isolated from chickens, chicken embryos, turkeys, ducks, geese, pigeons and japanese quail and their embryos. altogether 792 birds and embryos were examined and 411 of them (52%) were infected with mycoplasmas. isolates were identified by indirect immunofluorescence using monospecific rabbit antisera against 16 recognised species of avian mycoplasma (am) and two species of acholeplasma. in all 633 strains of mycoplasma were detected and most of these belonged to recognised am sp ... | 1987 | 18766652 |
| 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 |
| on the histochemical characterization and distribution of fast and slow muscle fibers in certain avian skeletal muscles. | histochemical techniques based upon the ph sensitivity of myofibrillar adenosine triphosphatase are used to differentiate avian skeletal muscle fibers as either fast or slow. pars thoracica m. pectoralis (pm) of several avian species, pars cranialis m. latissimi dorsi (ldcr) of the japanese quail, and m. tensor propatagialis (tp) of the domestic pigeon are examined. fast fibers predominate in the pm, and slow fibers in the ldcr. the tp shows marked internal variation in the distribution of muscl ... | 1987 | 2951958 |
| 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 |
| 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 |
| in vitro effect of prostaglandins on the accumulation of cyclic amp in the avian oviduct. | the effects of prostaglandins e1, e2, and f2 alpha (pge1, pge2, and pgf2 alpha, respectively) on cyclic amp production in tissue samples from the uterus (u), uterovaginal sphincter (uvs), and vagina (v) of regularly laying hens as well as the effects of pge2 and forskolin on u and v of japanese quail were studied. both pge1 and pge2 enhanced cyclic amp production in the hen oviductal segments, particularly in the v in a dose-related manner, pge1 being the more effective agonist. pgf2 alpha had n ... | 1987 | 3034716 |
| experimental studies on marek's disease in japanese quail (coturnix coturnix japonica). | day-old quails experimentally infected with marek's disease (md) virus of quail origin developed lymphoid tumors. the severity of the disease increased considerably with serial passage. tumor transplants could be made with cells derived from gross tumors in skeletal muscles, spleen cells, and blood from md-affected quails. after five to six serial transplants, the tumor could not be transplanted further. marek's disease tumor-associated surface antigen (matsa) was demonstrated in lymphoid cells ... | 1987 | 3039961 |
| effect of the injection solvent on steroid activity. | the effects of testosterone, 5 alpha-dihydrotestosterone, and androstenedione on cloacal gland and sternotracheal muscle growth and on luteinizing hormone plasma levels were studied in japanese quail. the steroids were given to the animals in daily intramuscular injections and were dissolved either in propylene glycol or in ethanol:saline (1:1). the three steroids had significant effects on the responses which were measured, but the magnitude of this effect was clearly related to the type of veh ... | 1987 | 3817442 |
| animal models utilized in research on muscular diseases in japan. | a comparative study of human and animal muscular dystrophies revealed a number of differences in clinical symptoms and muscle pathology. in chicken muscular dystrophy (line 413), the white muscle was preferentially involved with striking vacuole formation in the sarcoplasm. despite massive muscle fiber necrosis with phagocytosis which occurred in large groups in both hamsters (bio 14.6) and mdx mouse dystrophies, the regenerating process compensated for the muscle fiber degeneration and resulted ... | 1987 | 3601989 |
| the metabolism of 14c-ddt, 14c-ddd, 14c-dde and 14c-ddmu in rats and japanese quail. | the metabolism and excretion of 14c-ddt, 14c-ddd, 14c-dde and 14c-ddmu were compared in male rats and male japanese quail after i.p. injection. the rate of excretion of radioactivity was greater in the rat than in the quail for all compounds except ddmu. skin and fat were major sites of residual radioactivity in both species, the compound administered and dde accounting for most of the radioactivity except in the case of ddmu. the four radiolabelled compounds were all present in significant quan ... | 1987 | 3604258 |
| japanese quail can learn phonetic categories. | japanese quail (coturnix coturnix) learned a category for syllable-initial [d] followed by a dozen different vowels. after learning to categorize syllables consisting of [d], [b], or [g] followed by four different vowels, quail correctly categorized syllables in which the same consonants preceded eight novel vowels. acoustic analysis of the categorized syllables revealed no single feature or pattern of features that could support generalization, suggesting that the quail adopted a more complex m ... | 1987 | 3629235 |
| improvements in the determination of the turnover rate of plasma thyroxine in avian species: application to the japanese quail. | the disappearance of the thyroid hormone thyroxine (t4) from plasma in fully grown male japanese quail can be described as a first order process with a rate constant of 0.178 +/- 0.013/h (mean +/- s.e.m., n = 8), which represents a half-life of 3.90 h. a small amount of [125i]t4 in relation to total circulating t4 was injected i.v. into japanese quail and plasma samples were taken at appropriate time-intervals for the determination of residual plasma radioactivity. the rate of disappearance of [ ... | 1987 | 3655608 |
| central and peripheral metabolism of 5 alpha-dihydrotestosterone in the male japanese quail: biochemical characterization and relationship with reproductive behavior. | an in vitro radioenzymatic assay and purification procedure by thin-layer chromatography were used to study the metabolism of dihydrotestosterone (dht) into 3 alpha- and 3 beta-androstanediols by the brain and cloacal gland of japanese quail. kinetic studies showed that these 2 metabolites are produced in a linear fashion with respect to time of incubation for up to 15 min but that they continue to accumulate for up to 4 h. the maximum velocity of these reactions is high (nmol/mg protein/15 min) ... | 1987 | 3690260 |
| acid maltase deficiency in the japanese quail; early morphological event in skeletal muscle. | the skeletal muscle of japanese quails with acid maltase deficiency (amd) was studied morphologically at various developmental stages, from the 16th embryonal day up to 3 months after hatching. membrane-bound glycogen particles began to appear in the affected skeletal muscle at the 16th embryonal day. in normal embryonic muscles, a certain amount of free glycogen particles was observed but they were not membrane-bound. therefore, this is the earliest morphological event in the muscle of japanese ... | 1987 | 3111161 |
| mc29 deletion mutants which fail to transform chicken macrophages are competent for transformation of quail macrophages. | a number of mc29 mutants with deleted myc genes have been previously characterized. many of these mutants have been found to be defective for transformation of chicken macrophages in vitro and for tumor induction in chickens. such mutants are capable of transforming japanese quail macrophages in vitro and inducing a high incidence of tumors in japanese quail. thus, japanese quail may contain a factor(s) capable of complementing the defective transforming proteins encoded by some deleted v-myc ge ... | 1987 | 3295297 |
| luteinizing hormone secretion from the quail pituitary in vitro. | an enzymatically dispersed pituitary preparation from japanese quail (coturnix coturnix) was used to study the dynamics of gonadotropin release. after an 18-h incubation, the cells were challenged with different luteinizing hormone-releasing hormones (lhrh) for 90 min. using pituitary cells from mature males, mammalian and chicken lhrh i (gln8-lhrh) had approximately equal luteinizing hormone (lh)-releasing activity whereas chicken lhrh ii (his5, trp7, tyr8-lhrh) was 8-9 times more potent. the l ... | 1987 | 3304437 |
| steroids modulate the release of luteinizing hormone from quail pituitary cells. | an enzymatically dispersed pituitary preparation from male japanese quail (coturnix coturnix) was used to study the effects of gonadal and adrenal steroids on gonadotropin release. cells were preincubated for 18 hr with or without steroids and then challenged with chicken luteinizing hormone-releasing hormone (clh-rh i; gln8-lh-rh). preincubation with testosterone (t; 10 nm) significantly suppressed (p less than 0.05) luteinizing hormone release in response to clh-rh i (10 ng/ml). preincubation ... | 1987 | 3325334 |
| comparative thyroid function in adult japanese quail and ring doves: influence of dietary iodine availability. | thyroid function was studied in japanese quail, coturnix japonica, and ring doves, streptopelia risoria, when both were fed the same dietary iodine (i; 930 micrograms i/kg). we also compared thyroid function in groups of doves receiving low i (less than 100 micrograms i/kg) or moderate i (930 micrograms i/kg). we measured thyroid gland (tg) weight, tg stable i content, tg 125i uptake, and 125i labeling of thyroid hormones. triiodothyronine (t3) and thyroxine (t4) concentrations in tgs and serum ... | 1987 | 3430122 |
| development of the glycogen body of the japanese quail, coturnix japonica. i. light microscopy of early development. | the glycogen body is a functionally enigmatic structure located in lumbosacral region of the spinal cord in birds. this tissue is unique to birds, and, although it is believed to be present in all species, studies on the glycogen body to date have been confined largely to the domestic chicken. the present study is the first to describe the glycogen body of the japanese quail (coturnix japonica) during incubation and at hatching. light microscopy and histochemistry were used to identify the glyco ... | 1987 | 3430633 |
| evaluation of interspecific hybrids of the chicken, guinea fowl, and japanese quail for innate resistance to coccidia. | experimental chicken/guinea fowl hybrids, guinea fowl, and chickens were orally inoculated with eimeria acervulina or e. tenella, which are specific for chickens, or with e. grenieri, which is specific for guinea fowl. no intact oocysts were found in feces within 24 hr of inoculation, suggesting that excystation occurred in the normal and abnormal hosts. no oocysts were found in the feces of hybrids during a 9-day postinoculation period. the guinea fowl passed oocysts of guinea fowl coccidia (e. ... | 1987 | 3442527 |
| [effectiveness of a combined live mumps-measles vaccine]. | the reactogenic and areactogenic properties of a live combined mumps-measles vaccine (mmv) prepared in primary cultures of japanese quail embryo cells from attenuated strains of mumps (l-3) and measles (l-16) viruses were under study. the observations involved 648 infants varying in ages from 1 to 3 years, seronegative to measles and mumps viruses, without the history of the disease and vaccinations against these infections or contraindications to vaccinations. the infants were vaccinated with 5 ... | 1987 | 3445589 |
| 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 |
| 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 |
| effect of vitamin e and synthetic antioxidants on the survival rate of mercury-poisoned japanese quail. | the effect of vitamin e and the synthetic antioxidants, 6-ethyoxy,1,2-dihydro 2,2,4-trimethylquinoline (ethoxyquin), 2,6 bis(1,1 dimethyethyl)-4-methylphenol (bht), n,n-diphenyl-p-phenylene diamine (dppd), bis-(diethyl thiocarbamoyl) disulfide (antabuse), and 2 tertiary-butyl-4-methoxyphenol (bha) on organic mercury-induced mortality was investigated in japanese quail. when the synthetic antioxidants, ethoxyquin, bht, and antabuse were fed at 1% of the diet, they induced mortality. ethoxyquin wa ... | 1987 | 3588500 |
| growth hormone status and growth characteristics of japanese quail divergently selected for four-week body weights. | a randombred line of quail (r1) and two lines selected for either increased (hw) or decreased (lw) 4-wk body weight were used to examine the relationship of growth to circulating growth hormone (gh) levels during growth. differences in gh between males and females were not detected. growth hormone was low at hatching in all lines but then increased to relatively high levels by the first post-hatching sample (3 to 7 days). a decline in gh then occurred in all lines, with low adult levels detected ... | 1987 | 3684882 |
| circulating levels of luteinizing hormone and androgen in mature male japanese quail over 24 hours. | male japanese quail on a 16 light:8 dark photoperiod (on at 0600 h) were sampled over 24 h to determine peripheral levels of the luteinizing hormone and testosterone. six males were sampled (each animal sampled once) at each of 10 sampling periods that began at 0800 h and ended the next morning at 0800 h. serum testosterone concentrations were greatest at 2000 h and decreased across the night (2200 to 0600 h) to reach a nadir at 0500 h; levels increased in the morning but fell again at 1700 h. l ... | 1987 | 3684863 |
| sexual differentiation and hormonal control of the sexually dimorphic medial preoptic nucleus in the quail. | we recently identified a sexually dimorphic nucleus in the preoptic region of the japanese quail, the medial preoptic nucleus (pom), which is significantly larger in males than in females. in the present study, we investigated the hormonal control of this morphological neuroanatomical difference and the possible relationships between the sexual dimorphism in pom volume and in copulatory behavior. treatments which are known to affect sexual behavior were thus applied to different groups of birds ... | 1987 | 3620956 |
| rapid photoperiodic responses in japanese quail: is daylength measurement based upon a circadian system? | experimental photoperiods, presented either once only or repeatedly, were used to assess the oscillatory and hourglass properties of the photoperiodic clock in japanese quail. gonadectomized quail on 8-hr daylengths respond to a single skeleton photoperiod consisting of two 8-hr light pulses separated by 2 hr of darkness (i.e., ldld 8:2:8:6) with a marked increase in secretion rate of luteinizing hormone (lh). this response suggests that the second light pulse interacts with a "photoinducible ph ... | 1987 | 2979655 |
| iron content and distribution in japanese quail. | determination of blood haematocrit and haemoglobin, plasma iron content, total iron binding capacity and phosphoprotein (vitellogenin), and the iron content of different organs (pectoral muscle, liver, spleen, intestine, femur bone marrow, blood, gonad and eggs, and feathers) were carried out in prelaying, onset of laying and full laying females, as well as in adult males. the whole iron content was also determined on incinerated specimens giving these results: 53.7 parts per million (p.p.m.) ir ... | 1987 | 3562776 |
| changes in embryonic development associated with long-term selection for high growth rate in japanese quail. | selection for rapid growth in the quail resulted in a changed growth pattern of the embryo and the extra-embryonic membranes (the yolk sac and allantois). the early part of the incubation period was characterized by a reduced embryo weight and a more rapid early development of the extra-embryonic membranes. these changes were followed by an increased growth rate of the embryo. the increased growth rate was apparently linked to the more rapid early development of the extra-embryonic membranes. th ... | 1987 | 3440527 |
| response of growth-selected japanese quail lines to tannin levels in grain sorghum diets with suboptimal protein. | growth of selected lines of japanese quail fed grain sorghum diets was evaluated. suboptimal protein levels (23 and 25%) were used in conjunction with two varieties of sorghum differing in tannin content (.02 vs. 6.06%). chicks of three related lines of quail differing in growth rates and mature body sizes were fed the diets from 0 to 28 days of age. growth was significantly reduced (14 and 6%) by substitution of high tannin sorghum for low tannin sorghum in the 23 and 25% protein diets, respect ... | 1987 | 3671284 |
| changes in gonadotrophin-releasing hormone and lh in japanese quail during the first few days of photostimulation. | castrated japanese quail responded to a single long day with a five- to eightfold increase in plasma lh levels. a rise in lh secretion appeared 19-24 h after dawn and lh levels were still increased 3 days later, despite the fact that the birds had been returned to a short daylength. pituitary lh content decreased, reflecting these changes in secretion, although significant falls in content were only found 36-96 h after dawn, when lh secretion was maximal. hypothalamic gonadotrophin-releasing hor ... | 1987 | 3305758 |
| comparative thyroid development in precocial japanese quail and altricial ring doves. | the patterns of thyroid development in precocial japanese quail and altricial ring doves are described and compared. thyroid development can be divided into two phases: the first is characterized by increasing functional capacity of the thyroid gland but low circulating concentrations of thyroid hormones; during the second phase there are further increases in thyroid gland activity as well as a shift toward much higher levels of thyroid activity in the periphery. in japanese quail, the first pha ... | 1987 | 3298534 |
| gene controlling a differentiation step in the quail melanocyte. | albino mutation in animals blocks pigmentation owing to a deficiency in tyrosinase, although it does not affect the differentiation of colorless melanocytes from the neural crest. in the albino japanese quail (al, sex-linked), it was demonstrated that morphologically normal melanocytes differentiated from neural crest cells in culture and that these cells contained unmelanized melanosomes as expected for the mutant cells. the mutant melanocytes, however, were shown to exhibit tyrosinase activity ... | 1987 | 3139348 |
| quantification of lysine dynamics in the japanese quail. | to cockerels of the japanese quail four graduated flooding doses of 14c-labelled l-lysine (20-160 mg) in starch gel were administered into the crop. the animals were slaughtered between 40 and 210 min thereafter. the tca soluble fraction of the gastrointestinal tract, of blood plasma, liver and muscle were analyzed for their lysine content and its specific radioactivity. incorporation of radioactivity into the tca insoluble fraction of the same organs was also followed. after quantification of l ... | 1987 | 3120671 |
| a lewis x hapten is the major glycolipid of japanese quail intestine. | a fucolipid isolated from japanese quail intestine was identified as beta-galactosyl-1,4-(alpha-fucosyl-1,3-) beta-n-acetylglucosaminyl-1,3-beta-galactosyl-1,4-beta-glucosyl-1,1-cera mide, a glycolipid which exhibits x-hapten activity. analysis of the tissue at various embryonic stages showed that the fucolipid is characteristically present at later stages of organogenesis. | 1987 | 2888753 |
| brain monoamines and sexual behavior in japanese quail: effects of castration and steroid replacement therapy. | in the male japanese quail, testosterone is required for the activation of sexual behavior. this steroid dependent process may rely heavily on mediation via monoaminergic neurons. these experiments were conducted to study the relationship between reproductive state (hormonal and behavioral components) and levels of monoamines in selected areas of the brain in japanese quail. in experiment 1, monoamine levels in a number of brain areas were compared in castrates, testosterone-implanted castrates, ... | 1987 | 24897261 |
| a method to quantify aggressiveness in japanese quail (coturnix c. japonica). | testing procedures which rely on paired fights are unsuitable for measuring individual aggressiveness because the outcome of initial encounters influences subsequent dominance status. in an effort to circumvent this problem, we developed a test system which quantifies aggressiveness in individual japanese quail by measuring locomotor and pecking activity of test birds presented with the visual stimulus of a conspecific. using this procedure, we demonstrate that aggression is specific to sexually ... | 1987 | 3659151 |
| effect of photoperiod and melatonin on cold resistance, thermoregulation and shivering/nonshivering thermogenesis in japanese quail. | the effect of photoperiod and melatonin treatment on cold resistance and thermogenesis of quails was studied. the birds were acclimated for 8 weeks to short day (8l:16d) or long day (16l:8d) conditions, and 8 of 16 quails in each group were implanted with melatonin capsules. one group of quails was maintained outside in an aviary during winter. oxygen consumption (vo2), body temperature (tb, recorded with temperature transmitters) and shivering (integrated pectoral emg) were recorded continuousl ... | 1987 | 3693622 |
| [the effect of dietary lysine excess and deficiency on metabolism in japanese quail]. | we conducted three experiments with japanese quail to study the influence of deficient and excessive contents of lysine in the feed in relation to certain zootechnical parameters, protein value, to the active of liver xanthine dehydrogenase, content of free plasma lysine under the conditions of the maximum saturation of blood pool, and to the changes in 14c-labelled lysine degradation. the zootechnical parameters and protein value were optimum at the content of 5.22 g lys per 16 g nitrogen in th ... | 1987 | 3109105 |
| immunocytochemical markers revealing retinal and pineal but not hypothalamic photoreceptor systems in the japanese quail. | the retinal proteins opsin, alpha-transducin, s-antigen and interstitial retinol-binding protein (irbp) are essential for the processes of vision. by use of immunocytochemistry we have employed antibodies directed against these "photoreceptor proteins" in an attempt to identify the photoreceptor systems (retina, pineal and deep brain) of the japanese quail. opsin immunostaining was identified within many outer (basal portion) and inner segments of retinal photoreceptor cells and limited numbers ... | 1987 | 2952278 |
| effects of oestrogen and anti-oestrogen on the cells of the endosteal surface of male japanese quail. | 1. the endosteal cellular response occurring in the early stages of medullary bone formation was histologically examined in the femurs of male japanese quail treated with oestrogen and antioestrogen. 2. the numbers of endosteal cells decreased, and preosteoblasts and osteoblasts increased, on the endosteal surface following oestrogen treatment. 3. after oestrogen and anti-oestrogen treatment the numbers of preosteoblasts and osteoblasts on the endosteal surface did not increase. however, endoste ... | 1987 | 3446339 |
| 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 |
| detection of neural connection to the infundibular complex by partial or complete hypothalamic deafferentation in male quail. | to elucidate the stimulatory and inhibitory neural systems for photoperiodic control of avian reproduction, immature male japanese quail were subjected to partial or complete hypothalamic deafferentation, followed by exposure to long and short photoperiods. the results indicated that when the encephalic photosensitive area (infundibular complex, inf) was preserved after hypothalamic deafferentation, birds were able to respond to long days and their gonads eventually recrudesced, and that testicu ... | 1987 | 3428559 |
| egg production in four generations of paired japanese quail. | four generations of japanese quail were hatched in succession starting with the progeny of an athens randombred quail colony. in each generation quail were maintained in cages as male-female pairs. the photoperiod was 16 hr of light per day with feed and water available ad libitum. from 6 to 20 weeks of age mortality, egg production, fertility, hatchability, and progeny livability were improved over previously published reports of reproduction in colony cages. mortality decreased while age at 50 ... | 1987 | 3588489 |
| avian tissues as bioindicators of exposure to alkylleads: metabolism of ethyllead salts by japanese quail. | 1988 | 22148657 | |
| [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 |
| effect of hypophysectomy on 17 alpha-hydroxylase activity in theca cells of the ovarian follicle in the japanese quail. | the activity of 17 alpha-hydroxylase, a key enzyme for progesterone metabolism in avian follicles, was measured in cell-free homogenates of isolated theca cells of japanese quail. kinetic studies revealed that differences in enzyme activity in the largest and the second largest follicles were mainly due to differences in vmax values. in order to investigate the mechanism of regulation of 17 alpha-hydroxylase activity, quail were hypophysectomized at various time periods during the ovulatory cycl ... | 1988 | 3266329 |
| morphological evaluation of the atherogenicity of corn oil, hydrogenated corn oil, and butter fat in quail. | the atherogenicity of corn oil, hydrogenated corn oil, and butter fat was studied using 57 fourty-day-old male japanese quails. the animals were fed one of the following diets: basal diet, basal diet with corn oil plus cholesterol, basal diet with hydrogenated corn oil plus cholesterol, or basal diet with butter fat plus cholesterol. each atherogenic diet contained 15% fat and 2% cholesterol. marked hypercholesterolemia developed in all fat-fed groups after 3 weeks or 3 months, but no significan ... | 1988 | 3244049 |
| a possible role for the eyes in the photoperiodic response of quail. | the effects of blinding on the photoperiodic responses of male japanese quail were investigated by measuring plasma luteinizing-hormone (lh) concentrations in intact and castrated birds. blinded birds were still able to respond to short and long days with appropriate changes in lh levels, suggesting that the basic photoperiodic mechanisms do not require retinal photoreception. however, there were clear-cut differences between blinded and sighted birds with the lh levels being higher in blinded q ... | 1988 | 3240855 |
| oviposition pattern of japanese quail following hypothalamic lesioning with super-absorbent polymer. | the functions of two hypothalamic areas in controlling the female reproductive cycle were investigated by the intracerebral injection of a new type of water-absorbent polymer of high capacity (super-absorbent polymer). after injection of a minute amount of the polymer into the brain tissue, bulging of the polymer produces a discrete lesion at the site of injection. two lines (t- and j-lines) of japanese quail were used; t-line, having a characteristic free-running oviposition pattern irrespectiv ... | 1988 | 3240852 |
| stimulatory effects of the noradrenergic neurotoxin dsp4 on sexual behavior in male quail. | four separate experiments were carried out to test in castrated male japanese quail the effects on testosterone-induced sexual behavior of the neurotoxic drug n-(2-chlorethyl)-n-ethyl-2- bromobenzylamine hydrochloride (dsp4). in each experiment, dsp4 enhanced some aspects of the testosterone-induced sexual behavior. the latency between the start of testosterone treatment and the first occurence of copulatory behavior was decreased, the behavior frequency and duration were increased, and the late ... | 1988 | 24896908 |
| 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 |
| expression of the troponin complex genes: transcriptional coactivation during myoblast differentiation and independent control in heart and skeletal muscles. | we compared the developmental regulation of the three troponin genes that encode the proteins of the ca2+ regulatory complex in striated muscles of the japanese quail. nuclear run-on transcription and rna protection analyses showed that the fast skeletal troponin i, the fast skeletal troponin t, and the slow skeletal-cardiac troponin c genes were transcriptionally coactivated and that transcripts rapidly accumulated within 6 to 12 h after the initiation of myoblast differentiation. the fast-isof ... | 1988 | 3185544 |
| effects of estrone and estradiol-17 beta on 25-hydroxycholecalciferol hydroxylase activities in female japanese quail. | equimolar amounts of estrone and estradiol-17 beta injected into sexually immature female japanese quail caused comparable increases and decreases in the renal activity of 25-hydroxycholecalciferol (25hcc) 1 alpha-hydroxylase and 25-hydroxycholecalciferol 24-hydroxylase, respectively. peak activity of the former enzyme was induced by both estrogens within 6 hr and had declined by 24 hr. plasma concentrations of estrone and estradiol following the injection were maximal within 3-6 hr of injecting ... | 1988 | 3410301 |
| formation and changes of the subembryonic liquid from turned, unturned, and cultured japanese quail eggs. | japanese quail eggs belonging to the same flock of hens were incubated under different conditions: group 1 eggs were turned 3 times a day, group 2 eggs were left unturned, and group 3 eggs were cultured and left unturned. the results indicate that failure to turn eggs results in a delayed efflux of liquid and glucose from albumen and from the subembryonic liquid. furthermore, the major difference between unturned and cultured eggs was that in the first group the glucose levels and in the second ... | 1988 | 3219193 |
| divergent selection for growth in japanese quail under split and complete nutritional environments. 2. water and feed intake patterns and abdominal fat and carcass lipid characteristics. | a study was conducted to investigate water and feed intake patterns, abdominal fat and carcass lipid levels, feed efficiency and growth in high (h) and low (l) body weight lines of japanese quail divergently selected under complete diet (cd) or split diet (sd) environments. birds under the sd environment could self-select from high-protein low-energy or low-protein high-energy diets. progeny from both the selected and control (c) lines were evaluated under the sd environment in generations 6 and ... | 1988 | 3217303 |
| immunocytochemical studies on the lhrh system of the japanese quail: influence by photoperiod and aspects of sexual differentiation. | immunocytochemistry was used to determine if photoperiod and/or sex have any effect on the pattern of the luteinizing hormone-releasing hormone (lhrh) system in the brain of the japanese quail. immunopositive perikarya were found within three major areas of the brain: the rostral paraolfactory lobe, the preoptic, and the septal region. a quantitative analysis of lhrh cell numbers was performed on male and female quail after two photoperiodic treatments: sexually mature birds exposed to 24 weeks ... | 1988 | 3044600 |
| steroidogenic properties of isolated adrenocortical cells from japanese quail selected for high serum corticosterone response to immobilization. | the effect of selection for high stress response on adrenocortical function was examined by measuring the corticosterone response of adrenocortical cells isolated from random-bred japanese quail and quail selected for high serum corticosterone response to immobilization (high-stress). highly enriched adrenocortical cells were incubated with various concentrations of acth1-24 (acth), 8-bromo-cyclic amp (8br-camp) and pregnenolone for 2 hr. corticosterone production was measured by radioimmunoassa ... | 1988 | 3224523 |
| 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 |
| [immunohistochemical and ultrastructural study of aortic lesions in fat-fed quails]. | a total of 13 forty-day-old male japanese quails had free access to a atherogenic diet containing 15% corn oil and 2% cholesterol or commercial basal diet for 3 months. birds fed basal diet showed no significant intimal lesions. these birds had two types of cells, i.e. smooth muscle cell and fibroblast-like cell, in the tunica media of the ascending aorta. while fat-fed birds showed marked lipid-rich intimal lesions in the ascending aorta but not in the abdominal aorta. some macrophage-derived f ... | 1988 | 3260871 |
| studies of fluid and spermatozoal transport in the extratesticular genital ducts of the japanese quail. | stereological studies of the spermatic ducts of the quail were carried out for comparison between different parts of the system and those of other species, and to provide a basis for future physiological studies. duct length, surface areas and volumes of various components of the ducts were determined. values were subsequently used to calculate net fluxes of fluid across the duct epithelium, spermatozoal velocity and the distribution of spermatozoa throughout the system. it was concluded that th ... | 1988 | 3198469 |
| [effect of polygonum multiflorum on the life-span and lipid metabolism in senile japanese quails]. | 1988 | 3191547 | |
| 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 |
| plasma desorption mass spectrometric analysis of glycosylated ovomucoid third domain from japanese quail. | 1988 | 2577843 | |
| distribution of nanomole quantities of 235u in young and adult japanese quail and in the f1 generation. comparison with 153gd. | enriched uranium, 93.16% for 235u, served as a tracer of uranium deposition in an avian species, the japanese quail. a second label, 153gd, provided for monitoring of procedures and for estimation of the 235u content of live eggs. depositions of 235u were greater than for 153gd in all tissues except the yolk sac and the liver. skeletal levels for 235u were age- and sex-dependent. feathers contained only 0.11% of the 235u tracer in contrast to 50% of the endogenous uranium. the results show that ... | 1988 | 3384676 |
| antifertility effect of gossypol in male japanese quail. | conventionally housed 130-160 g adult male japanese quail were given gossypol acetic acid (gossypol) im at 25 mg/kg in 0.5 ml of 10% etoh for 12 and 24 days (groups 1 and 2), respectively. one day after treatment was terminated they were allowed to mate with laying females individually for 20 days. fertility was 0% from mating of the group 1 birds on days 1-2 and increased to 25, 35, 55 and 65% on days 3-6 after cessation of gossypol treatment. at day 11, fertility was 80 vs 84% in controls, whe ... | 1988 | 3374259 |
| does a biological clock reside in the eye of quail? | the site (intra- vs. extraocular) of the circadian clock driving an ocular melatonin rhythm in japanese quail was investigated by alternately covering the left and right eyes of individual quail, otherwise held in constant light (ll), for 12-hr periods. this procedure exposed each eye to a light-dark (ld) 12:12 light cycle 180 degrees (12 hr) out of phase with the ld 12:12 light cycle experienced by the other eye. this protocol entrained the melatonin rhythm in the left eye of quail 180 degrees ... | 1988 | 2979642 |
| divergent selection for growth in japanese quail under split and complete nutritional environments. 1. genetic and correlated responses to selection. | japanese quail were divergently selected for 4-wk body weight under two different nutritional environments. in one environment quail were divergently selected for high and low body weight (h and l) under a split diet (sd) with quail having the opportunity to self-select feed from high protein and high energy diets. in the other environment, quail were similarly selected (h and l) under a normal (28% protein) complete diet (cd). after 11 generations of selection, h-sd and h-cd lines were 48.9 and ... | 1988 | 3405929 |
| back-drawer: a behavioral mutant in japanese quail. | the behavioral mutant "back-drawer" of japanese quail is characterized by crouching and back-drawing action with the neck bending ventrally and occasional forward rolling. the abnormal behavior appears from hatching to 8 weeks of age. back-drawers were classified into three types: (1) those showing the abnormality at hatching and dies within 5 days; (2) those showing the abnormality after 2 weeks of age and dies shortly thereafter; and (3) long survivors suffering from abnormal behavior, and sho ... | 1988 | 3396630 |
| photostimulation of japanese quail by dim light depends upon photophase contrast, not light intensity. | three experiments were conducted to determine whether dim light is interpreted by japanese quail as subjective day or night, and whether this interpretation depends upon absolute light intensity. birds were exposed to 24-h days consisting of either bright light (2500-3000 lx) with dim light (0.5-5 lx) or dim light with darkness. locomotor activity was higher in the brighter photophase, whether it was bright light or dim light, indicating that the birds interpreted the brighter phase as daytime. ... | 1988 | 3378067 |
| serum enzymes in hemorrhaged japanese quail after microwave irradiation during embryogeny. | 1. japanese quail eggs were exposed to 2.45 ghz continuous wave microwave radiation at an incident power density of 5 mw/cm2 and a specific absorption rate of 4.03 mw/g during the first 12 days of embryogeny. 2. after hatching, serum biochemical changes in response to hemorrhagic stress were measured following a hemorrhage of 30% of the calculated total blood volume. 3. lactate dehydrogenase, beta-glucuronidase, acid phosphatase, glucose and protein were not affected by microwave irradiation dur ... | 1988 | 2899471 |
| plasma corticosterone in hemorrhaged japanese quail after microwave irradiation in ovo. | 1. sexually immature male and female japanese quail were divided within each sex into three treatment groups: hemorrhaged by jugular puncture; immobilized for 2 min, but not hemorrhaged (shams); and neither immobilized nor hemorrhaged (controls). 2. hemorrhage resulted in increased plasma corticosterone levels in both sexes. corticosterone levels in shams were higher than in controls. 3. in another experiment, japanese quail eggs were irradiated during incubation with 2.45 ghz cw microwave radia ... | 1988 | 2896572 |
| 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 |
| interaction of surgical deafening and photoperiod on cloacal gland and testes size in japanese quail. | two experiments were conducted to further examine the interaction of social stimuli and photoperiod on cloacal and gonadal responses in male japanese quail. in experiment 1, adult males kept on a maximal (15l:9d) stimulatory photoperiod were surgically deafened and/or visually isolated from roommates. after 6 weeks, there were no differences in cloacal gland or testes size among visually isolated birds, deafened birds, visually isolated and deafened birds, and control birds. it would appear that ... | 1988 | 3360300 |
| effects of dietary butylated hydroxyanisole and cysteine on toxicity of lathyrus odoratus to broiler and japanese quail chicks. | the effect of .75% dietary butylated hydroxyanisole (bha) and 1% cysteine on the toxicity of lathyrus odoratus seed to japanese quail and broiler chicks was examined. in both species, the feeding of lathyrus seed as a component of a complete diet depressed (p less than .05) body weight gain and feed intake. typical signs of lathyrism, including ruffled feathers, enlarged hocks, curled toes, ataxia, leg paralysis, and mortality, were observed. neither bha nor cysteine exerted protective effects a ... | 1988 | 3375172 |
| intestinal colonization of campylobacter jejuni in young japanese quails (coturnix coturnix japonica). | 1988 | 3386114 | |
| extrahypothalamic distribution of vasotocin-immunoreactive fibers and perikarya in the avian central nervous system. | immunohistochemical analysis of the extrahypothalamic distribution of vasotocin-like immunoreactive elements within the central nervous system of the domestic fowl and japanese quail, revealed several mesencephalic, pontine and bulbar target areas topographically identifiable. extrahypothalamic immunopositive perikarya were observed in diencephalic and mesencephalic locations after glutaraldehyde fixation. | 1988 | 3390126 |
| a genetic defect in hyomandibular furrow closure in the japanese quail: the causes for ear-opening abnormality and formation of an ear tuft. | the mutant et (ear tuft) quail strain is characterized by an ear-opening abnormality frequently accompanied by ear tufts. the mutant ear opening is oval shaped with a fissure on its ventral margin, whereas the ear tufts project from the ventral end of the fissure or the posterior margin of the ear opening. the ear tufts are composed of a feathered peduncle. the size of the ear tufts and the ear-opening abnormality are variable. the incidence of the ear tufts and the ear-opening abnormality in th ... | 1988 | 3392388 |
| application of the quail-chick chimera system to the study of brain development and behavior. | hatched chicks with chimeric brains containing cells from both the domestic chicken (gallus gallus domesticus) and the japanese quail (coturnix coturnix japonica) have been produced by transplantation of various regions of the neural tube at the 8- to 15- somite stage. the positions of host and donor cells relative to graft boundaries observed throughout embryonic development and after hatching implicated both radial and tangential cell movements in brain morphogenesis. in addition, transplants ... | 1988 | 3413496 |
| [electron microscopy study of the nucleocapsid structure of the measles virus isolated from cell cultures with primary and chronic infections]. | electron microscopic examination of isolated intracellular measles virus nucleocapsids (nc) revealed a relationship between their structure, cell system, and the type of infection. acute virus infection of vero or japanese quail embryo cells gave rise to the formation of linear nc strands with regularly and tightly stacked turns. acutely infected l-41 or hep-2 cells contained heteromorphous viral nc populations which included both typical and loosely packed nc. persistently infected l-41 and hep ... | 1988 | 3414068 |
| refined crystal structure of streptomyces griseus trypsin at 1.7 a resolution. | streptomyces griseus trypsin (sgt) is a bacterial serine proteinase that is more homologous to mammalian than to other bacterial enzymes. the structure of sgt has been solved primarily by molecular replacement, though some low-resolution phase information was supplied by heavy-atom derivatives. the mammalian pancreatic serine proteinases bovine trypsin (bt) and alpha-chymotrypsin (cht) were used as molecular replacement models. because these proteins have low homology with sgt compared to the ma ... | 1988 | 3135412 |
| the propagation of avian viruses in a continuous cell line (qt35) of japanese quail origin. | seven of nine avian virus families tested (birnaviridae, coronaviridae, herpesviridae, paramyxoviridae, poxviridae, reoviridae, and retroviridae) were found to replicate in a quail fibroblast cell line, designated qt35, resulting in a cytopathic effect (cpe) visible with the naked eye or by low-power microscopy. in comparison, only one (paramyxoviridae) of seven mammalian virus families tested produced an observable cpe. cytopathic changes induced by examined viruses were round cell, syncytial, ... | 1988 | 3135794 |
| dihydrofolate reductase activity in the purkinje neuron populations of some non-mammalian vertebrates. | the intensity and distribution of histochemically demonstrable dihydrofolate reductase (fh2-r ec 1.5.1.3.) in unfixed cryostat sections was studied in purkinje neurons of adult vertebrates that have either simple neural circuits and cytoarchitectonics (ictalurus nebulosus, rana esculenta) or complex neural circuits and cytoarchitectonics (coturnix coturnix japonica), compared with the rat as a control. the reaction was generally undetectable in ictalurus nebulosus and in rana esculenta; with pos ... | 1988 | 3149438 |
| [effect of magnesium sulfate on the reproduction of the measles virus in cell culture]. | magnesium sulphate in concentrations of 25-50 mm induced reproducible increase in titers of extracellular measles virus (by 0.5-2.0 1g tcd50/0.5 ml) in japanese quail embryo cells. mgso4 effect was observed with all methods of cell cultivation: stationary, roller, or on microcarriers. its effect was associated not with its stabilizing influence on the extracellular virus but rather with the stimulation of the synthesis of intracellular viral proteins. | 1988 | 3195145 |
| conditioning of appetitive and consummatory sexual behavior in male japanese quail. | two different types of stimulus objects, a live female quail artificially adorned with bright orange feathers and an inanimate toy dog, served as conditioned stimuli. for subjects in experimental groups, the conditioned stimuli were presented shortly before access to a sexually receptive normal female quail. for subjects in control groups, exposure to the conditioned stimuli was unpaired with copulatory opportunity. subjects in the experimental but not in the control groups quickly came to appro ... | 1988 | 3209962 |
| synergistic effects of vitamin d metabolites. | the vitamin d3 metabolites 1 alpha,24r,25- and 1 alpha,25s,26-trihydroxy vitamin d3 and their combinations with 1 alpha,25-dihydroxy vitamin d3 were tested for antirachitic activity in rats, chicken and japanese quails. the trihydroxylated compounds were found to increase the activity of 1 alpha,25-dihydroxy vitamin d3. since this synergistic effect is restricted to calcium absorption and bone formation while bone calcium mobilization is unchanged, the combined administration might improve calci ... | 1988 | 3214133 |
| relationship between throat feather-color pattern and photodependency of testicular function in the athens randombred control line of japanese quail. | the relationship between throat feather-color and testicular regression and recrudescence under short photoperiods of 6 hr light (l):18 h dark (d) was examined in the athens randombred control line of japanese quail. in contrast to earlier studies, no differences were found in testicular regression when quail with brick red, mixed red and white, central red surrounded by white, or all white throat feathers were shifted from a photoperiod of 16l:8d to one of 6l:18d. the cloacal protuberance areas ... | 1988 | 3222197 |
| roles of age, body weight and composition in the initiation of sexual maturation of japanese quail (coturnix coturnix japonica). | 1. the roles of chronological age, body weight and body composition in the initiation of sexual maturation of japanese quail (coturnix coturnix japonica) were investigated by imposing an inhibitory photoperiod (ip), and by the intramuscular injection of turkey growth hormone (gh) or antisera to turkey growth hormone (agh). 2. absence of sexual maturity in the ip treatment was accompanied by reduced testis and ovary-oviduct weights, and an increased breast muscle weight expressed as a proportion ... | 1988 | 3224292 |