Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| the effect of acute cold and warm ambient temperatures on the thyroid hormone concentration in blood plasma, blood supply, and oxygen consumption in japanese quail. | 1980 | 7364210 | |
| cloacal gland of the japanese quail: androgen dependence and metabolism of testosterone. | a cloacal gland complex whose growth and development is androgen-dependent exists in the japanese quail. in-vitro incubation studies of the cloacal gland using 4-14c-labelled testosterone as substrate allowed the positive identification of five metabolites: androstenedione, 5 beta-dihydrotestosterone (5 beta-dht), 5 beta-androstane-3 alpha, 17 beta-diol, 5 alpha-dht and 5 alpha -androstane-3 alpha, 17 beta-diol. more polar metabolites, not yet chemically identified, were detected in trace amount ... | 1980 | 7365366 |
| studies on the blood groups in the japanese quail: detection of three antigens and their inheritance. | 1980 | 7371893 | |
| visual information and approach behavior in genetically manipulated quail chicks: preference hierarchies and interactions of flash rate, flash amplitude, luminance, and color. | visual preferences were studied in 18,225 quail chicks (coturnix coturnix japonica) of three genetic populations, in relation to 185 pairs of systematically varied and combined flash rates, flash amplitudes, luminances, and colors. results indicate additive and nonadditive interactions between preference values of stimulus elements embedded in complex stimulus information. flicker preferences changed with changes in overall stimulus liminances, flash amplitudes, and colors. likewise, color prefe ... | 1980 | 7372852 |
| a circadian rhythm in photosensitivity as the basis for the testicular response of japanese quail to intermittent light. | in order to examine the relationship between the circadian rhythm in photosensitivity and intermittent light in stimulating testicular development, japanese quail were exposed to intermittent light providing a single dark period interruption varying from .5 to 10 hr in duration. the treatment lasted for 3 weeks. changes in the cloacal gland size were monitored throughout the test and testis weights were taken at the end of the test (7 and 11 weeks of age). the results indicated that quail have a ... | 1980 | 7375432 |
| morphological and functional peculiarities of mesenchymal cells in the pars tuberalis of the pituitary gland. | following injection of high doses of horseradish peroxidase (hrp), mesenchymal cells distributed in the perisinusoidal space of the pars tuberalis of the hypophysis in cats, rabbits and japanese quails, sequester the exogenously administrated peroxidase intensively. these cells are designated by the authors as "horseradish peroxidase-uptake cells" (hrp-uptake cells or huc). hrp-uptake cells constitute a system of macrophages in the pars tuberalis of mammals and birds, and are located around the ... | 1980 | 7388886 |
| involvement of catecholaminergic mechanisms in the photoperiodically induced rise in serum luteinizing hormone of japanese quail (coturnix coturnix japonica). | 1980 | 7390138 | |
| aflatoxin susceptibility of selected and control japanese quail lines. | 1. the influence of aflatoxin on growth and mortality of diverse lines of quail was studied in five trials. 2. feeding 5 or 10 micrograms aflatoxin/g diet from 4 to 7 weeks of age resulted in significant decreases in body-weight gain in all lines. 3. similar gains for all treatments during the third week of feeding indicated that body weights were reduced only during the first two weeks. 4. crop intubation with 4 or 8 mg aflatoxin/kg body weight resulted in different mortality patterns for the s ... | 1980 | 7397591 |
| reverse selection in a japanese quail line previously selected for 4-week body weight. | after 38 generations of individual selection for high 4-week body weight in a japanese quail line (t) fed a 20% protein diet containing .2% thiouracil, a reverse selected line (tr) was established by selecting quail in the t line with the lowest 4-week body weight. the tr line was thereafter provided with the same nutritional environment as the t line and selected for low 4-week body weight for 5 generations. the mean 4-week body weights of t line quail increased only slightly from generation 38 ... | 1980 | 7402982 |
| the early influence of aflatoxin upon sexual maturation in the male japanese quail. | the effects of early exposure to aflatoxin on sexual maturation were investigated in young male japanese quail. quail in treatment a were fed a soy-corn starter mash with 10 micrograms aflatoxin/g added from 7 to 21 days of age. treatment b quail were fed this from 14 to 28 days of age. animals from each treatment were sampled at intervals from 25 days to 70 days of age. both behavioral and physiological indicators of sexual maturation were monitored including measurements of sexual behavior, cl ... | 1980 | 7413583 |
| the effects of exogenous steroidal hormones on the testes of quail from selected high and low mating lines. | several steroid hormones were tested for their effects on the testes of lines of japanese quail selected for high and low mating frequency. estradiol benzoate and testosterone propionate caused a complete and partial regression of the testes, respectively, while dihydrotestosterone did not affect testicular weight. spermatogenesis was adversely affected by both estradiol benzoate and testosterone propionate but not by dihydrotestosterone. dihydrotestosterone caused a significant increase in the ... | 1980 | 7413595 |
| somitogenesis in cultured embryos of the japanese quail, coturnix coturnix japonica. | the ability of unsegmented paraxial mesoderm from japanese quail embryos to form somites was studied by culturing pieces of embryos, containing the segmental plates, on an agar medium. in the first experiments, two explants were prepared from each donor embryo. both explants contained a segmental plate and neural tube, but only one contained notochord. the explants containing notochord formed 11.4 +/- 2.1 somites, while the explants without notochord formed 11.1 +/- 1.3 somites. it was concluded ... | 1980 | 7416048 |
| participation of the eyes in the photosexual response of japanese quail (coturnix coturnix japonica). | 1980 | 7417677 | |
| changes in the pituitary and plasma lh, plasma and follicular progesterone and estradiol, and plasma testosterone and estrone concentrations during the ovulatory cycle of the quail (coturnix coturnix japonica). | 1980 | 7419043 | |
| [reproduction of fixed rabies virus in a quail fibroblast culture growing in suspension]. | reproduction of culture variant of fixed rabies virus was studied in cultures of quail fibroblasts growing in roller suspension cultures, as well as in monolayer cultures of japanese quail embryos fixed on deae-sephadex a-50 particles. titers of the virus in cultures on the microcarrier were found to be similar with those in roller monolayer cultures, namely 5.75--6.5 lg ld50/ml. in shaker and roller suspension cultures the virus titers were lower: 4.5--5.25 lg ld50/ml. | 1980 | 7423971 |
| the ductuli efferentes of the epididymal region of birds. | ultrastructural studies were undertaken on the efferent ductules of the testis of the domestic fowl (gallus domesticus), japanese quail (coturnix coturnix japonica) and guinea-fowl (numida meleagris). four cell types were identified and described: ciliated cells which were found in the epithelium of both the proximal and distal segments of the efferent ductules, non-ciliated type i cell which, together with the ciliated cell, formed the epithelium of the proximal efferent ductule and the non-cil ... | 1980 | 7429963 |
| interrelationship between thyroid and gonadal function in female japanese quail kept under short and long photoperiods. | the concentrations of progesterone, testosterone, oestrone, oestradiol, thyroxine (t4) and tri-iodothyronine (t3) in the plasma of 8-week-old female japanese quail exposed to short (6 h light: 18 h darkness; 6l:18d) and long (18l:6d) photoperiods were determined by radioimmunoassay after ovariectomy, thyroidectomy and treatment with t4. in birds exposed to short days treatment with t4 slightly increased both the concentrations of progesterone, oestrone and oestradiol in plasma and the weight of ... | 1980 | 7430916 |
| delayed reproductive development resulting from aflatoxicosis in juvenile japanese quail. | aflatoxicosis was induced in young japanese quail. in the first experiment five replicates of 30 birds per treatment were fed a soy-corn basal ration containing 0, 5, or 10 microgram aflatoxin per gram of feed from 1 to 3 weeks of age. at 3 weeks, the animals were sacrificed and mesurements taken. in the second experiment, 0 to 10 microgram aflatoxin per gram of diet were fed from either 1 to 3 weeks of age or 2 to 4 weeks of age. at 3 weeks of age body weights were significantly (p < .05) reduc ... | 1980 | 7433358 |
| studies on the amino acid and protein requirements of laying japanese quail (coturnix coturnix japonica). | six experiments were conducted to define the amino acid and protein requirements of laying japanese quail. in the initial experiments the diets contained 12% protein from a mixture of casein and soybean meal and were supplemented with essential amino acids and glutamic acid to promote optimum egg production. later studies were conducted with corn-soybean meal diets. results from varying the levels of essential amino acids led to the following estimates of amino acid requirements (as percent of t ... | 1980 | 7433362 |
| response of japanese quail (coturnix coturnix) to organophosphorus ester-induced delayed neurotoxicity relative to domestic hens (gallus gallus domesticus). | 1980 | 7437555 | |
| a reappraisal of the goitre-prevention assay: determination of the thyroid secretion rate in the japanese quail and the relative potencies of t3 and t4 in preventing goitrogenesis. | 1980 | 7439671 | |
| a third allele at the phosphoglucose isomerase locus of the japanese quail. | phosphoglucose isomerase electrophoretic patterns of the japanese quail were found to be controlled by three alleles at an autosomal locus. in the laboratory quail population, the frequency of the alleles pgif, pgis1 and pgis2 was 0.175, 0.465 and 0.360, respectively. | 1980 | 7458006 |
| calcium and phosphorus requirements of growing japanese quail. | 1. calcium and phosphorus requirements of growing female japanese quail during 4 and 5 weeks of age were estimated in a 4 x 3 factorial experiment comprising 5, 7, 9 and 11 g calcium and 5, 6 and 7 g phosphorus/kg diet. 2. responses in weight gain, bone ash, food intake and food : gain ratio showed no significant differences due to varying dietary calcium and phosphorus concentrations. 3. it appears that growing japanese quail require not more than 5 g calcium and not more than 5 g phosphorus (2 ... | 1980 | 7459655 |
| the topography of mesotocin and vasotocin systems in the brain of the domestic mallard and japanese quail: immunocytochemical identification. | the neurosecretory systems producing mesotocin (mt) and vasotocin (vt) (the avian homologues of oxytocin and vasopressin, respectively) were characterized in the brains of the domestic mallard and japanese quail by means of indirect immunofluorescence techniques using specific antisera. in the anterior preoptic region, including the organum vasculosum of the lamina terminalis, and at different levels of the supraoptic and paraventricular nuclei, separate mesotocin- and vasotocin-producing neuron ... | 1980 | 7459995 |
| prolactin concentrations in the pituitary gland and plasma of japanese quail in relation to photoperiodically induced sexual maturation and egg laying. | 1980 | 7461438 | |
| efficient incorporation of deuterated amino acids into quail egg white proteins for nuclear magnetic resonance studies. | the in vivo incorporation of deuterated amino acids into egg white proteins of japanese quail is described. using a synthetic diet, the level of incorporation of selectively deuterated tyrosine, tryptophan, histidine, and phenylalanine into lysozyme was greater than 80% as demonstrated by proton nmr. load and load-chase experiments using [3h]phenylalanine or [3h]leucine monitored the fast uptake time (t 1/2 = 2 days) and confirmed the high levels of incorporation. the potential of this system fo ... | 1981 | 7462210 |
| vitamin e deficiency in the japanese quail. | japanese quail were maintained on a low vitamin e soybean meal diet for 35 weeks. percent fertile eggs was significantly decreased after 20 weeks and hatchability was severely depressed. free tocopherol in the plasma of both sexes was markedly reduced in the deficient birds. plasma creatine phosphokinase was unaffected by the low vitamin e treatment. although no other clinical symptoms were observed, dietary vitamin e (2 iu/kg diet) was inadequate to support normal reproduction. | 1980 | 7465502 |
| effects of phenylhydroxylamine and aminophenols in japanese quail in vivo. | 1. the effects of phenylhydroxylamine, and o- and p-aminophenol were studied in the japanese quail. 2. symptoms normally observed in aniline-treated birds were seen in quail after phenylhydroxylamine dosage at > 10 mg/kg. aminophenols (up to 50 mg/kg) did not give these symptoms. 3. injection of phenylhydroxylamine (50 mg/kg) resulted in formation of 70% ferrihaemoglobin after 5 min, following which a rapid reduction of ferrihaemoglobin was observed. 4. phenylhydroxylamine reached highest blood ... | 2012 | 7470247 |
| dietary cholesterol and fat saturation effects on plasma esterified and unesterified cholesterol in selected lines of japanese quail females. | three lines of japanese quail females, randombred controls (cl), high response (hl), and low response (ll) lines, selected for plasma total cholesterol for 18 generations, were fed all-plant-source, nonatherogenic diets to which 0 or .5% cholesterol were added from 6 to 18 wk of age. in all three lines, plasma cholesterol increased when cholesterol was fed; however, responses were greater in the hl than in the ll line, with cl intermediate. in a second experiment, females of the three lines were ... | 1995 | 7479517 |
| the genetic link between the chinese bamboo partridge (bambusicola thoracica) and the chicken and junglefowls of the genus gallus. | further comparison of mitochondrial control-region dna base sequences of 16 avian species belonging to the subfamily phasianinae revealed the following: (i) generalized perdicine birds (quails and partridges) are of ancient lineages. even the closest pair, the common quail (coturnix coturnix japonica) and the chinese bamboo partridge (bambusicola thoracica), maintained only 85.71% identity. (ii) the 12 species of phasianine birds previously and presently studied belonged to three distinct branch ... | 1995 | 7479935 |
| a new inherited muscular disorder in japanese quails (coturnix coturnix japonica). | thirteen adult mutant (lwc strain) japanese quails (coturnix coturnix japonica), between the ages of 8 and 60 weeks were examined for a progressive muscular disorder. the disorder, inherited as an autosomal dominant trait, was clinically apparent as early as 28 days of age; it was characterized by generalized myotonia, muscle stiffness, and muscle weakness. affected birds were identified by their inability to lift their wings vertically upward and by their inability to right themselves when plac ... | 1995 | 7483209 |
| the circadian rhythm of thermoregulation in japanese quail. ii. multioscillator control. | most biochemical, physiological, and behavioral processes in vertebrates show significant daily rhythms. under constant conditions, these rhythms exhibit an endogenous periodicity around 24 h showing that they are driven by an internal circadian clock. in japanese quail, the circadian clock driving activity and body temperature rhythms is functionally organized as a dual-oscillator system. under certain conditions, such as switching birds from light:dark (ld) 12:12 to continuous darkness (dd), t ... | 1995 | 7488761 |
| sex-related alterations in antioxidant status and susceptibility to atherosclerosis in japanese quail. | to examine antioxidant enzyme activities in aorta and blood of male and female japanese quail on control or cholesterol-supplemented diets, given the strong influence of sex and the postulated role of oxidative processes in the pathogenesis of atherosclerosis. | 1995 | 7489535 |
| molecular cloning of complementary deoxyribonucleic acids for the pituitary glycoprotein hormone alpha-subunit and luteinizing hormone beta-subunit precursor molecules of japanese quail (coturnix coturnix japonica). | complementary dnas encoding precursor molecules of the pituitary glycoprotein hormone (pgh) alpha- and luteinizing hormone (lh) beta-subunits of japanese quail were isolated from a quail adenohypophyseal cdna library using corresponding chicken cdnas as hybridization probes. the isolated cdnas had a length of 695 and 724 bp, respectively, and contained sequences of 5' and 3' untranslated regions and an entire coding region of the precursor molecules. two series of incompletely repeating and part ... | 1994 | 7515015 |
| neurotensin immunoreactive cells in the gastrointestinal epithelium of the chicken, pigeon and japanese quail. | distribution and frequency of neurotensin immunoreactive cells were investigated in the digestive tract of the chicken, pigeon and japanese quail by an immunohistochemical technique. immunoreactive cells were distributed in the epithelium of the pylorus, duodenum, jejunum, ileum, caecum and colon, but not in the epithelium of the tongue, crop and esophagus. the pylorus showed the highest frequency of the immunoreactive cells in the three species and the chicken revealed the highest frequency amo ... | 1994 | 7517733 |
| developing blood vessels and associated extracellular matrix as substrates for neural crest migration in japanese quail, coturnix coturnix japonica. | japanese quail embryos were used to examine paths of neural crest cell (nc) migration in relationship to the embryonic vasculature. immunolabeling for nc, angioblasts and the extracellular matrix (ecm) glycoproteins fibronectin (fn), laminin (ln) and tenascin (tn) revealed several instances where spatiotemporal patterns of nc migration coincide with the embryonic vascular pattern and its associated ecm. an in vitro model for angiogenesis was modified to include nc, and associations with "capilla ... | 1994 | 7521199 |
| mapping of neurochemical markers in quail central nervous system: vip- and sp-like immunoreactivity. | the distribution of cells and fibres containing vasoactive intestinal polypeptide (vip) and substance p (sp) was investigated in the brain of japanese quail focussing on the centers involved in reproductive activities. sp-immunoreactive (ir) structures were chiefly present within the ventral telencephalic regions, the periventricular hypothalamus and the dorsal aspects of thalamus. vip immunopositive structures were rarely associated with recognizable nuclei and they were observed in the organum ... | 1995 | 7541207 |
| mosaic lectin labelling in the quail collecting ducts. | morphological and histoenzymological differences have been observed between intercalated and principal cells of the quail coturnix coturnix japonica collecting ducts. the present study was designed to shed light on the lectin affinity of the collecting duct cells within cortex and medulla by the use of hrp-labelled lectins combined with glycosidase degradation. binding of pna and rca-i lectins consequent to enzymatic release of sialic acid revealed abundant sialylated carbohydrate moieties withi ... | 1995 | 7541264 |
| exogenous vascular endothelial growth factor induces malformed and hyperfused vessels during embryonic neovascularization. | vascular endothelial growth factor (vegf) is a potent and specific endothelial mitogen that is able to induce angiogenesis in vivo [leung, d. w., cachianes, g., kuang, w.-j., goeddel, d. v. & ferrara, n. (1989) science 246 1306-1309]. to determine if vegf also influences the behavior of primordial endothelial cells, we used an in vivo vascular assay based on the de novo formation of vessels. japanese quail embryos injected with nanomolar quantities of the 165-residue form of vegf at the onset of ... | 1995 | 7543999 |
| invasion and viability of campylobacter jejuni in experimentally contaminated japanese quails' eggs. | in japanese quail eggs experimentally immersed in a suspension of campylobacter jejuni from human patients (y6817, y6878), strain y6817 was recovered from 15 (18.8%) eggs among 80 between 0.5 hr and 72 hr after immersion. invasion of the eggs by strain y6878 was also seen in 10 (12.5%) of 80 eggs between 0.5 hr and 24 hr after immersion. when egg yolk was inoculated with both strains and held at 4 degrees c, the organisms were detectable for a longer time than the ones kept at 20 degrees c. on t ... | 1995 | 7548430 |
| dietary nitroprusside alleviates atherosclerosis in hypercholesterolemic japanese quail (coturnix coturnix japonica). | male japanese quail (coturnix coturnix japonica), susceptible to cholesterol-induced atherosclerosis, were rendered hypercholesterolemic by feeding a diet containing 0.5% cholesterol in two experiments. half the animals also received a dietary supplement of sodium nitroprusside ranging in concentration from 0.005% to 0.015%. after 10 weeks on the diets, serum was obtained for cholesterol analysis, the animals were killed, and the aortae removed and examined for the presence of atherosclerotic le ... | 1995 | 7553329 |
| structural responses of japanese quail intestine to different diets. | japanese quail were fed five diets of different nutrient composition and the structural responses of the intestinal tract were measured. six morphometric variables were recorded. depending on the diet, we found drastic changes in those factors affecting surface dimensions of the mucosa epithelium and the thickness of the muscle layers of the intestinal wall. we performed a principal component analysis to describe the interrelationship among the different variables and the response of the intesti ... | 1995 | 7555690 |
| exposure of domestic quail embryos to extremely low frequency magnetic fields. | four hundred domestic quail eggs (coturnix coturnix japonica) were used to study the possible teratogenic effects of extremely low frequency magnetic fields (elf-mfs) on early embryonic development. ten females were selected from a flock on the basis of their high fertility rate and low number of spontaneous abnormalities and they were selectivity maintained in nesting-boxes in a room where feeding and environmental conditions were carefully controlled. all the eggs used in the experiments were ... | 1995 | 7561392 |
| amino acid sequence of alpha- and beta-polypeptide chains of turkey (meleagris gallopavo) hemoglobin. | two hemoglobin components are recognized in erythrocytes of the adult turkey (meleagris gallopavo). we determined the amino acid sequences of turkey alpha a-, alpha d- and beta-globin from intact globin chains and chemical cleavage fragments. the sequences are highly similar to the hemoglobin of the phasianidae, chicken, japanese quail and pheasant. turkey and pheasant beta-globin are identical. the amino acid sequence of turkey alpha a-globin differs by only one residue from chicken alpha a-glo ... | 1995 | 7576241 |
| the role of ion transport in the formation of sub-embryonic fluid by the embryo of the japanese quail. | 1. using a modification of the method of new (1955) explanted blastoderms of the japanese quail were cultured for up to 72 h, and the role of ions in the formation of sub-embryonic fluid (sef) investigated. 2. culture media deficient in either sodium or chloride ions reduced the volume of sef secreted by up to a quarter. ionic composition of the fluid was little altered, and sodium was transported against a concentration gradient. 3. amiloride, an inhibitor of na+/h+ exchange, reduced sef produc ... | 1995 | 7583371 |
| time course of hypertrophic adaptations of the anterior latissimus dorsi muscle to stretch overload in aged japanese quail. | the purpose of this study was to determine if aged japanese quail demonstrated an altered time course of change in the morphology of the anterior latissimus dorsi (ald) muscle during the first two weeks of hypertrophy induced by stretch overload. the left wing of adult (12 weeks of age) and aged (90 weeks of age) birds were weighted with 10% of their body weight; the right wing served as the intra-animal control. thirteen to sixteen birds from each age group were killed after 7 and 14 days of st ... | 1995 | 7583796 |
| effect of prolonged starvation on the activities of malic enzyme and acetylcholinesterase in tissues of japanese quail. | during starvation muscle protein degradation is increased but the mechanism for this is uncertain. in this study japanese quail were starved for 5 days and the activities of malic enzyme and acetylcholinesterase were determined in various tissues. sds-polyacrylamide gel electrophoresis showed that the soluble proteins with molecular weights corresponding to 160, 120, 108, 99 and 38 kda were absent in the liver of the starved group. in the pectoral muscle the soluble proteins with molecular weigh ... | 1995 | 7584601 |
| proteolysis of japanese quail and chicken plasma apolipoprotein b and vitellogenin by cathepsin d: similarity of the resulting protein fragments with egg yolk polypeptides. | plasma very-low density lipoprotein (vldl) and vitellogenin (vtg) from mature female japanese quail (coturnix coturnix japonica) and chickens (gallus domesticus) were isolated and digested in vitro with cathepsin d (ec3.4.23.5). the incubation mixtures were then reduced and subjected to gradient (4.5-18%) sds-polyacrylamide gel electrophoresis. protein fragments were stained with either coomassie brilliant blue r-250 (vldl digests) or coomassie brilliant blue r-250 containing 20 mm alcl3 (vtg di ... | 1995 | 7584850 |
| conservation of functionally important epitopes on myelin associated glycoprotein (mag). | phylogenetic conservation of protein domains often points to functionally important regions. as a step toward mapping these sites on myelin associated glycoprotein (mag) we have determined the species distribution of epitopes recognized by a panel of anti-mag antibodies (ab). monoclonal antibodies (mab) b11f7, gens3 and 28 recognized mag only in mammalian species. however, the mab 513 which inhibits mag binding recognized a conformational epitope in a wider distribution of species including, hum ... | 1995 | 7584863 |
| isolation and characterization of opioid peptides in the avian brain. | neuropeptides are supposed to be implicated in the regulation of hormone as well as nonhormone dependent behavioral processes in birds. previous immunohistochemical studies have suggested that in birds opioid pentapeptides, met- and leu-enkephalins, may be present in the brain including the regions that regulate sex hormone dependent behaviors, such as reproductive behaviors. to determine biochemically the presence of opioid peptides in the avian brain, a study was conducted to isolate these pep ... | 1995 | 7595281 |
| effects of opioid peptides on the electrical activity of preoptic and hypothalamic neurons in the quail brain. | we have recently isolated three opioid peptides, i.e., met- and leu-enkephalins and met-enkephalin-arg6-phe7, from the avian brain. in the present study, therefore, effects of these endogenous opioid peptides on the electrical activity of preoptic and hypothalamic neurons of the adult male japanese quail were examined using a brain slice preparation. all of the three opioid peptides inhibited the spontaneous firing activities of subsets of neurons in the preoptic area and the paraventricular nuc ... | 1995 | 7595282 |
| a possible role of vitamin d receptors in regulating vitamin d activation in the kidney. | the vitamin d endocrine system is regulated reciprocally by renal 25-hydroxyvitamin d3 1 alpha- and 24-hydroxylases. previously, we reported that renal proximal convoluted tubules, the major site of 1 alpha, 25-dihydroxyvitamin d3 production, have vitamin d receptors. in the presence of vitamin d receptors, renal proximal convoluted tubules cannot maintain the state of enhanced production of 1 alpha, 25-dihydroxyvitamin d3. to clarify this discrepancy, we proposed a working hypothesis for the re ... | 1995 | 7597089 |
| possible role of viruses in atherosclerosis. | relative to the role of viruses in the pathogenesis of atherosclerosis a number of questions remain to be answered. being ubiquitous, are the herpesvirus infections the norm or a diseased state in humans and animals? in all cases studied, including mdv induced atherosclerosis, direct isolation of viruses from arterial tissues has not been successful. are herpesviruses always latent or dormant in vascular tissues? what is the relationship between provirus and disease development? are they setting ... | 1995 | 7598020 |
| effects of insulin-like growth factor-i, estrogen, glucocorticoid, and transferrin on the mrna contents of ovalbumin and conalbumin in primary cultures of quail (coturnix coturnix japonica) oviduct cells. | the effects of estrogen, dexamethasone, insulin-like growth factor-i (igf-i), and transferrin on the messenger rna (mrna) contents of ovalbumin and conalbumin in primary cultures of quail oviduct cells were investigated. in the absence of one of the above hormones or factors, a decrease in ovalbumin mrna was prominent. in particular, removal of igf-i and transferrin caused a significant effect. studies using a combination of estrogen, dexamethasone, igf-i and transferrin indicated that igf-i coo ... | 1995 | 7599964 |
| culture characterization and viral infection of aortic smooth muscle cells from japanese quail susceptible to atherosclerosis. | proliferation of aortic smooth muscle cells (smcs), an important feature of atherosclerosis, occurs in the early stage of the disease in japanese quail when fed an atherogenic diet. quail aortic smcs were isolated from a total of 32 quail and cultured in eagle's minimum essential medium supplemented with 10% bovine fetal serum. studies were carried out to characterize the cells in vitro. they grew actively in the early passages, but began to develop cytopathic changes after 3-4 passages and even ... | 1994 | 7601271 |
| triphenyl phosphite-induced neuropathy in the avian forebrain: a silver impregnation study of the visual and auditory systems of the japanese quail. | single subcutaneous injections of triphenyl phosphite (tpp) (62.5-500 mg/kg body weight) were made in the japanese quail (coturnix coturnix japonica). the extent and density of resultant central nervous system degeneration were mapped by using the fink-heimer silver impregnation method to selectively impregnate degenerating axons and terminals. in addition to resulting in degeneration in the medulla and cerebellum, exposure to tpp also resulted in axonal and terminal degeneration in specific mid ... | 1995 | 7603630 |
| organophosphorus-induced delayed neurotoxicity: a comparative study of the effects of tri-ortho-tolyl phosphate and triphenyl phosphite on the central nervous system of the japanese quail. | the neurotoxic effects of single oral doses of tri-ortho-tolyl phosphate (totp) (500 mg/kg body weight) or single subcutaneous injections of triphenyl phosphite (tpp) (62.5-500 mg/kg body weight) were investigated in the japanese quail (coturnix coturnix japonica). oral doses of totp resulted in no detectable clinical signs while injections of tpp resulted in mild ataxia to severe paralysis depending upon the dosage level. at 24 hr postdosing, whole-brain activity of neuropathy target esterase ( ... | 1995 | 7603644 |
| the response of serum and hepatic lipids and the aortic wall to different levels of dietary cholesterol: a comparative study between hyperlipidemia-and- atherosclerosis-prone quail and commercially available quail. | a hyperlipidemia-and-atherosclerosis-prone (lap) quail model was developed by dietary cholesterol feeding through genetic selection of commercially available (ca) japanese quail. the response of serum lipids and the aortic wall to dietary cholesterol feeding was compared in ca and lap quails. ten groups were fed a combination diet with different levels of cholesterol and corn oil for 12 weeks. in ca quail, dietary feeding of cholesterol only failed to induce significant hypercholesterolemia or a ... | 1995 | 7610456 |
| homology between mitochondriogenesis in the avian and amphibian oocyte. | cytochrome oxidase cytochemistry was used to unequivocally identify the spread of mitochondria during oogenesis in the adult japanese quail. this enabled us to compare their distribution with the distribution in the xenopus laevis oocyte (tourte et al, 1984). in the quail the paranuclear mitochondrial cloud initially disperses homogeneously but afterwards segregates into 2 populations: (i) a population localized in the basophilic cortical layer (surrounding the vegetal pole); and (ii) clusters o ... | 1995 | 7612168 |
| metabolic adaptations induced by long-term fasting in quails. | after up to 21 days without food, adult male quails (coturnix coturnix japonica) lost about 45% of the initial body weight (100-150 g). as in naturally fast-adapted and larger birds, three phases were identified during prolonged fasting in quails. phase i lasted 2-3 days and was characterized by a rapid decrease in the rate of body weight loss and high fat mobilization. phase ii was longer and characterized by a slow and steady decline in the rates of body weight loss and of nitrogen excretion. ... | 1995 | 7614041 |
| a quantitative investigation of gonadal feminization by diethylstilboestrol of genetically male embryos of the quail coturnix coturnix japonica. | the effect of diethylstilboestrol on gonad development in quail embryos has been quantitatively analysed. quail embryos at 4 days of incubation were treated with diethylstilboestrol (des), using the egg dipping method. at 10 days of incubation, embryos were removed and killed by decapitation. tissues were prepared for chromosome analysis, and the parts of the abdomen containing the gonads were prepared for serial sectioning and quantitative assessment. left gonads of des-treated male embryos res ... | 1995 | 7616493 |
| avian neurosteroids. i. pregnenolone biosynthesis in the quail brain. | the present study was carried out to determine steroid biosynthesis from cholesterol in the brain of adult male japanese quails. as an initial step of the experiments, the concentrations of pregnenolone, dehydroepiandrosterone and their sulfate esters in the brain and plasma extracts were measured by specific radioimmunoassays (rias). to exclude the possibility that these steroids in the brain are derived from peripheral steroidogenic glands, hypophysectomized and sham-operated birds were used i ... | 1995 | 7620878 |
| avian neurosteroids. ii. localization of a cytochrome p450scc-like substance in the quail brain. | we have recently demonstrated that the avian brain as well as the peripheral steroidogenic glands produces pregnenolone, the main precursor of steroid hormones, on the basis of biochemical studies. therefore, the immunohistochemical and western immunoblotting analyses with a polyclonal antibody directed against the purified bovine adrenal cytochrome p450scc, which is involved in pregnenolone formation, was undertaken to investigate the localization of a cytochrome p450scc-like substance in the b ... | 1995 | 7620879 |
| complex study of the physiological role of cadmium. ii. effect of cadmium load on the cadmium content of eggs. | the possibility of "cadmium (cd) contamination" of eggs and the dynamics of cd accumulation were studied. a total of 40 (4 x 10) japanese quails weighing 155-200 g, being at the middle phase of egg production and kept on batteries in a climatized animal house were used. the birds were fed a standard quail layer diet and drank tap-water ad libitum. with the exception of the control group (cd-0), the diet of the other three groups was supplemented with cd sulphate homogeneously mixed in the diet s ... | 1995 | 7625292 |
| sexual differentiation of brain and behavior in quail and zebra finches: studies with a new aromatase inhibitor, r76713. | in many species of vertebrates, major sex differences affect reproductive behavior and endocrinology. most of these differences do not result from a direct genomic action but develop following early exposure to a sexually differentiated endocrine milieu. in rodents, the female reproductive phenotype mostly develops in the absence of early steroid influence and male differentiation is imposed by the early action of testosterone, acting at least in part through its central conversion into estrogen ... | 1995 | 7626466 |
| does unusual entrainment of the circadian system under t36h photocycles reduce the critical daylength for photoperiodic induction in japanese quail? | in photoperiodic species, short daylength resonance cycles of modulo t + 1/2 (t = 24 h) behave like long days because they entrain the circadian system so that alternate light pulses coincide with the photoinducible phase (oi) in castrated quail. however, while a long-day response after exposure to a single long daylength is readily detected by a rise in plasma lh (photoinduction), long-term exposure to ld 6:30 is ineffective in this respect. to discover whether this occurs because of unusual en ... | 1995 | 7632977 |
| isolation and characterization of cdna clones for japanese quail (coturnix japonica) major histocompatibility complex (mhccoja) class i molecules. | 1995 | 7642233 | |
| in situ end labeling of fragmented dna in induced ovarian atresia. | apoptosis is studied in a model of induced follicular atresia in the ovary of japanese quail (coturnix coturnix japonica) by in situ end labeling of dna fragments in granulosa cells using two different techniques (incorporation of labeled nucleotides by dna polymerase i or terminal deoxynucleotidyl transferase). the most remarkable observation related to apoptosis in this model is the predominant cytoplasmic localization of labeled dna fragments, while dna fragmentation appears to be absent from ... | 2006 | 7654330 |
| light down lethal: a new autosomal recessive down color mutation in japanese quail. | a new plumage color mutation of japanese quail (coturnix japonica) was named "light down lethal" based on its light coloration of neonatal plumage and almost total mortality by 3 weeks of age. prehatch mortality of the light down lethal was also higher (36.8%) than the wild type (8.2%). the majority of the light down lethal chicks that hatched died within 1 week of age. among the 103 light down lethal chicks that hatched, only two males survived to adulthood and reproduced normally. their adult ... | 2003 | 7657997 |
| karyotypic analysis of three species of phasianidae (galliformes: aves). | the karyology of the partridges francolinus francolinus asiae (2n = 70) and f. pondicerianus interpositus (2n = 68) and the japanese quail coturnix coturnix japonica (2n = 78) was investigated. the frequency distribution of the diploid number of chromosomes was tabulated and the most frequent number was taken to be the diploid number. all species showed a bimodal karyotype and the variation in the number of chromosomes was attributed to the macrochromosomes, although twelve macrochromosomes were ... | 1995 | 7671640 |
| [biochemical aspects of the toxic effects of supermethrin in a 140-day avian reproductive test]. | chronic toxic effects of supermethrin on some biochemical parameters (ast, alt, ldh, creatinine and total proteins) were investigated in 84 individuals of japanese quail divided into four groups (control-k, experimental group i-p1, experimental group ii-p2, experimental group iii-p3) in the conditions of 140-day avian reproductive test. the three experimental groups received the tested substance at these doses: p1-10.7 mg/kg l.w./day, p2-21.4 mg/kg l.w./day, p3-35.7 mg/kg l.w./day. the results o ... | 1995 | 7676578 |
| maternal rna content in oocytes of several mammalian and avian species. | the amount of maternal rna in the oocytes of several mammalian (mouse, rabbit, cow, pig, sheep) and avian (hen, japanese quail, guinea hen, turkey) species was determined. for mammals these were in the range of 0.47 ng/oocyte (mouse) to 0.98 ng/oocyte (cow), with the exception of the rabbit, where it was up to 15 ng/oocyte. birds' oocytes contain much higher levels of rna, from 1.0 microgram (japanese quail) up to 2.1 micrograms/oocyte (hen). the rna levels were determined by direct measurement ... | 1993 | 7679714 |
| adhesion activity of campylobacter jejuni for intestinal epithelial cells and mucus and erythrocytes. | live and formalin- or heat (100 degrees c, 30 min)-treated cells of campylobacter jejuni strains y6878 and y6817, and the supernatant of the heat-treated bacterial suspension had agglutinating activity for the intestinal epithelial cells of japanese quails and human (int407). among the erythrocytes derived from 7 animal species (human, horses, sheep, rabbits, mice, chickens, and quails), only rabbit erythrocytes were agglutinated by live and glutaraldehyde-, formalin-, or heat-treated cells of 1 ... | 1994 | 7696403 |
| photoperiod affects the morphology of a sexually dimorphic nucleus within the preoptic area of male japanese quail. | changes in the gross and cellular morphology of the nucleus preopticus medianus (pomn) were measured in response to changes in photoperiod in adult male japanese quail (coturnix japonica). pomn volume and the soma size of a dorsolateral population of neurons within pomn decreased when birds were moved from long day housing conditions (16l,8d) to short day housing conditions (8l,16d), and then increased again when birds were moved back to long day conditions, presumably as a function of the chang ... | 1994 | 7697357 |
| mycotic salpingitis in a japanese quail (coturnix coturnix japonica). | an adult female japanese quail (coturnix coturnix japonica) was received for postmortem examination. necropsy revealed the presence of white to grayish nodules 2-5 mm in diameter on the serosal surface of the oviduct. aspergillus flavus was isolated from these nodules in pure culture. histologically, these nodules were medium to large granulomatous lesions in serosa and the muscular wall of the oviduct. the lesions contained a large central necrotic core surrounded by giant cells, macrophages, a ... | 1994 | 7702530 |
| application of in vivo microdialysis to pineal research in birds: measurement of circadian rhythms of melatonin. | circadian rhythms of pineal melatonin release were measured in free-moving pigeons, japanese quails, and chickens under light-dark cycles followed by constant dim light. although melatonin levels differed among individual birds, circadian rhythms of melatonin were observed in all of them. using this technique, we could examine phase shifts of melatonin rhythms and suppression of melatonin release by photic stimulation in pigeons. we could also examine effects of norepinephrine infusion on melato ... | 1994 | 7708366 |
| acrylamide-induced peripheral neuropathy in normal and neurofilament-deficient japanese quails. | morphological effects of acrylamide (ac) on the peripheral nerves in normal and neurofilament (nf)-deficient (quv) japanese quails were investigated. ac (100 mg/kg) was injected intraperitoneally every other day. after the birds manifested neurological signs, they were necropsied (after 10 approximately 21 ac injections) and the sciatic and tibial nerves were examined. in both normal and quv qualis, ac produced axonopathy with a distal-proximal progression. in ac-intoxicated normal quails, the n ... | 1995 | 7709725 |
| effects of acute lead ingestion and diet on antibody and t-cell-mediated immunity in japanese quail. | this study investigated the interacting effects of acute lead exposure and different diets on antibody and t-cell-mediated immunity in japanese quail (coturnix coturnix). nine quail (nine week old males) were assigned randomly to each group in a factorial experiment with four treatments and two diets. the treatments were 1) a positive control group fed 20 micrograms/g corticosterone, 2) a negative control group given no lead or corticosterone, 3) a low-lead group, and 4) a high-lead group. the l ... | 1995 | 7710288 |
| hypertrophy and proliferation of skeletal muscle fibers from aged quail. | the purpose of this study was to determined whether fibers in the anterior latissimus dorsi (ald) muscle from aged japanese quail have decreased hypertrophic or proliferative responses to 30 days of stretch overload compared with fibers from adult birds. two groups of quail were studied, 12-wk-old quail (adult; n = 16) and 90-wk-old quail (aged; n = 16). the left wing of each bird was overloaded with a weight corresponding to 10% of the bird's body weight, and the right wing served as the intra- ... | 1995 | 7713826 |
| bh (black at hatch) gene appears to cause whole-body hemorrhage in homozygous embryos of japanese quail (coturnix coturnix japonica). | genotypes of early embryos obtained from mating bh/+ quail were determined by chorio-allantoic membrane grafting of their thigh skin, and the development of the bh homozygous embryos was examined histologically. the bh homozygous embryos died at an early stage of development (after 7 to 10 days of incubation) with a very high incidence of whole-body hemorrhage (approximately 100%), but malformation of neural tubes was not always accompanied by bh homozygosity. degeneration of the liver was more ... | 1995 | 7722476 |
| circadian rhythms of corneal mitotic rate, retinal melatonin and immunoreactive visual pigments, and the effects of melatonin on the rhythms in the japanese quail. | we investigated circadian ocular rhythms in the japanese quail, coturnix coturnix japonica. the birds were placed under light-dark cycles (ld 12:12), constant light (ll) and constant darkness (dd), and the retinas were dissected out at four-hour intervals throughout 24 h. following measurements were performed. (1) melatonin content in the retina was measured by radioimmunoassay. it was low in light and several folds higher in darkness under ld 12:12. the rhythm continued in dd, but disappeared i ... | 1995 | 7722956 |
| divergent selection for growth in japanese quail under split and complete nutritional environments. 8. progress from generations 18 through 30 following change of selection criterion. | following 17 generations of divergent selection for 4-wk bw under split- (sd) and complete- (cd) diet environments, two sublines were established from high (h-sd and h-cd) bw lines. subline h-sdg derived from the h-sd line was selected for bw gain from 2 to 4 wk under the sd environment, whereas subline h-cdg derived from the h-cd line was similarly selected under the cd environment. these two sublines were maintained and reproduced simultaneously with h-sd, l-sd, h-cd, l-cd lines from generatio ... | 1995 | 7724447 |
| effects of feed restriction on growth and reproduction in randombred and selected lines of japanese quail. | feed restriction (70% of ad libitum consumption) was carried out from 1 d after hatching until 44 d in a randombred quail line and until 28 d in a quail line selected for high 4-wk bw. body weights of restricted quail were significantly lower than ad libitum controls during restriction. two weeks after restriction ended, however, bw were no longer different. mortalities were twice as high under restriction. hatchability of eggs was not affected by restriction, but restricted quail of the selecte ... | 1995 | 7724465 |
| the use of japanese and bobwhite quail as indicator species in avian toxicity test. ecpa/gifap environmental round table. | a comparative analysis was made between the toxicity of plant protection products to two species of quail used in regulatory testing. it was shown that in general differences in the sensitivity between bobwhite quail and japanese quail were small, and not statistically significant. it was therefore concluded that both species should be seen as equally suitable models for avian safety assessment. the mutual acceptance of studies carried out on either of these species for us and ec registration pr ... | 1995 | 7728512 |
| influence of dietary aflatoxin on eimeria uzura infection in japanese quail (coturnix coturnix japonica). | a study was conducted to assess the influence of dietary aflatoxin on eimeria uzura in japanese quail (coturnix coturnix japonica). quail receiving 1 part per million (ppm) of dietary aflatoxin b1 and inoculated with 10(5) sporulated oocysts of e. uzura gained significantly less weight than chicks receiving either aflatoxin or coccidia alone. increased morbidity, mortality and decreased efficiency of feed utilization were also evident. the combination of e. uzura infection and aflatoxicosis resu ... | 1995 | 7732641 |
| ultrastructural characterization of the sexually dimorphic medial preoptic nucleus of male japanese quail. | the medial preoptic nucleus is a sexually dimorphic structure whose cytoarchitecture, afferent and efferent connections, and functions have been previously described. no detailed ultrastructural study has, however, been performed to date. here we describe the ultrastructural organization of this important preoptic structure of the male quail. neuronal cell bodies of the medial preoptic nucleus generally show extensive development of protein-synthesis-related organelles (rough endoplasmic reticul ... | 1995 | 7736550 |
| characterization of the japanese quail oocyte receptor for very low density lipoprotein and vitellogenin. | the plasma membrane receptor for vldl and vitellogenin from oocytes of japanese quail (coturnix coturnix japonica) was characterized and compared with that of another domestic fowl, the chicken (gallus domesticus). when visualized by ligand blotting with biotinylated or 125i-labeled lipoproteins, the quail vldl/vitellogenin receptor had an apparent m(r) of 95 kda under nonreducing conditions, identical to that of the chicken receptor. upon analysis by ligand blotting, binding of radiolabeled qua ... | 1995 | 7738685 |
| effects of sexual conditioning of devaluing the us through satiation. | male japanese quail were conditioned to approach a visual cs that predicted an opportunity to copulate with a female quail. subsequently the subjects were tested in both non-reinforced and reinforced test trials while sexually satiated and sexually deprived. in the satiation condition the sexual us was devalued by allowing the male subjects to copulate repeatedly with female birds just prior to testing. the subjects displayed significantly less approach to the cs when sexually satiated than when ... | 1995 | 7740126 |
| acquisition of pathogenicity of a newcastle disease virus isolated from a japanese quail by intracerebral passage in chickens. | newcastle disease virus (ndv) was isolated from a japanese quail (cotornix cotornix japonica). the effect of intracerebral and intranasal passages of the ndv in chickens on the pathogenicity was studied. pathogenicity of the viruses of different passage levels was compared with that of the original isolate by the mean death time with the minimum lethal dose in chicken embryos, intracerebral pathogenicity index in day-old chicks, intravenous pathogenicity index with 6-week-old chickens and the mo ... | 1994 | 7745878 |
| inhibitory specificity against various trypsins and stability of ovomucoid from japanese quail egg white. | the inhibitory specificity and stability of ovomucoid from japanese quail egg white (omjpq) were examined to understand its nutritional significance. omjpq showed strong inhibitory activities toward trypsins from various origins including human, and the trypsin inhibitions occurred at molar ratios of enzyme to inhibitor between 1/1 and 2/1. on the other hand, an equimolar mixture of the second and third domains of omjpq inhibited bovine trypsin more strongly than the corresponding native omjpq d ... | 1994 | 7751977 |
| ethane 1,2-dimethane sulfonate effects on the testis of the lizard, podarcis s. sicula raf: morphological and hormonal changes. | ethane 1,2-dimethane sulfonate (eds) destroys leydig cells in the testis of some rodents (mice excluded), disrupts interstitial and germinal compartments in the frog, rana esculenta, while it stimulates testicular activity in the teleost, gobius paganellus. in the japanese quail the toxin removes mature spermatozoa. there is no information on eds effects in reptiles. the present study examines the effect of eds treatment in the lizard podarcis s. sicula raf during two different periods of the te ... | 1995 | 7789742 |
| [the effect of high gravity on embryonic development in birds]. | an experiment was conducted on japanese quail and hen hatching eggs that had been incubated, and the embryos were subjected to hypergravitation of 10 g for 10 min on days 1 to 9 of embryonic development. both the experimental group and the control contained each 20 hatching eggs every day of the experiment (360 eggs in total). a centrifuge of the diameter 1,300 mm was used to create overload (hypergravitation) at the speed of 118 rotations per min. tab. i shows the layout of the experiment. embr ... | 1995 | 7793016 |
| co-localization of aromatase enzyme and estrogen receptor immunoreactivity in the preoptic area during reproductive aging. | immunoreactive aromatase enzyme (arom-ir) was studied in the preoptic and septal ares of the male japanese quail brain relative to the age-related decline in endocrine and behavioral components of reproduction. additional analyses were conducted to determine if the co-localization of arom-ir and estrogen receptor immunoreactivity (er-ir) in the medial preoptic area change during aging. young, sexually active, male quail (6 months of age) were compared to aged sexually active or inactive, male qu ... | 1995 | 7796096 |
| molecular species analysis of glycosphingolipids from small intestine of japanese quail, coturnix coturnix japonica by hplc/fab/ms. | neutral glycosphingolipids were isolated from quail small intestine and their structures were analysed. they contained: gal beta 1-4glccer(laccer), gal alpha 1-4galcer(ga2cer), gal alpha 1-4gal beta 1-4glccer(gb3cer), glcnac beta 1-3gal beta 1-4glccer(lc3cer), galnac beta 1-4gal beta 1-4glccer(gg3cer), galnac beta 1-4[galnac beta 1-3] gal beta 1-4glccer(lcgg4cer), and galnac alpha 1-3galnac beta 1-3gal alpha 1-4gal beta 1-4glccer (forssman glycolipid) as well as glucosylceramide, galactosylceram ... | 1994 | 7804001 |
| calcium uptake by chorioallantoic membrane: effects of vitamins d and k. | the chorioallantoic membrane (cam) of birds is an epithelial tissue that actively transports large amounts of ca during embryonic development. in this study the effect of vitamins d and k on ca uptake by the cam was studied. four dietary treatments were used to produce eggs that are the following: deficient in vitamins d and k (-d/-k), sufficient in both (+d/+k), or deficient in one and sufficient in the other (-d/+k or +d/-k). vitamin d-deficient (-d) japanese quail embryos (from hens fed 1,25- ... | 1994 | 7810624 |
| slowing of contractile properties in quail skeletal muscle with aging. | the effect of aging on muscle contractile function was examined in the anterior latissimus dorsi (ald) muscle of japanese quails aged 8 weeks (young adults), 26 weeks, 60 weeks, or 90 weeks (old birds). in vitro contractile measures of the ald were made at 25 degrees c (stimulus pulse = 0.1 ms). twitch contraction time in 90-week-old muscles was significantly greater than 8 to 26-week-old muscles (150 +/- 8 ms vs 168 +/- 18 ms). similarly, one-half relaxation time of the twitch was increased in ... | 1995 | 7814776 |
| relationship between shell porosity, shell thickness, egg weight loss, and embryonic development in japanese quail eggs. | japanese quail eggs that hatched (h) or pipped (pip) exhibited less weight loss through 15 d of incubation than did eggs that died late (ld), whereas eggs containing early dead (ed) embryos exhibited the greatest weight loss. the pore concentration at the large end of each egg was greatest in h eggs when compared with all other types. the pore concentration at the equator was greatest in h eggs and least in the eggs of the ed embryos. all other egg types lay statistically between these two types ... | 1994 | 7816736 |
| the monoamine content of the brain in the neurofilament-deficient quail, (the quiver quail). | changes in neurotransmission are known to take place in a variety of conditions, such as parkinson's disease. a neurofilament-deficient mutant of the japanese quail, named the quiver quail, exhibits generalized quivering as a clinical sign. the content of monoamines (noradrenaline (na), dopamine and 5-hydroxytryptamine) and the uptake and release of l-[3h]na were measured in brain of this bird. in quiver, the na content in neostriatum and thalamus, and the 5-hydroxytryptamine content in neostria ... | 1994 | 7820106 |
| vasotocinergic innervation of sexually dimorphic medial preoptic nucleus of the male japanese quail: influence of testosterone. | the distribution of vasotocin (vt)-immunoreactive (ir) fibers was described in the preoptic and septal regions of the male quail brain. the density of vt-ir fibers was measured in the sexually dimorphic preoptic nucleus (pom) and lateral septum (sl) of adult male quail (coturnix japonica) by means of quantitative image analysis. experimental manipulations of the hormonal environment in the peripubertal period influenced this distribution. in both regions, the vt immunoreactivity was reduced or a ... | 1994 | 7820616 |
| photoperiodic activation of fos-like immunoreactive protein in neurones within the tuberal hypothalamus of japanese quail. | photoperiodic stimulation of quail (coturnix coturnix japonica) resulted in the appearance of a nuclear fos-like protein within neurones of the basal tuberal hypothalamus. on transfer to long days the number of neurones containing this fos-like immunoreactivity increased from about 150 to 700, the neurones being scattered throughout the length of the tubero-infundibular complex. this activation had occurred by early in the second long day and was maintained for at least three long days. over thi ... | 1995 | 7823310 |