Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| histochemical analysis of liver cells from short term, aflatoxin-dosed and nondosed coturnix coturnix japonica. 1. aflatoxin-sensitive quail. | although aflatoxicosis in coturnix coturnix japonica has been described, the histochemical localization of liver chemicals and the occurrence of ingested aflatoxins within blood, feces, and liver have not been described. six to 8-week-old quail, which were intubated with a carrier with or without .3 mg mixed aflatoxins (afb1, afb2, afg1, afg2)/kg body weight were sacrificed within .25 to 5 days of intubation. deparaffinized sections of livers were stained for lipids, nucleic acids, polysaccharid ... | 1983 | 6669501 |
| [topography of the quail retina]. | retinas of quails (coturnix coturnix japonica) were studied by light microscopy. by this, an area centralis with high cell density could be demonstrated. moreover, in the posterior-superior retina there exists a region of moderate cell density containing a central red field with a high concentration of cones with red oil droplets. the results suggest the quail to be able to fix objects lateral to its head and in front of its bill in direction of picking. | 1983 | 6673390 |
| short term variation in serum luteinizing hormone and testosterone in the male japanese quail. | a series of experiments was conducted to examine the incidence of short-term variation in serum testosterone and luteinizing hormone (lh) in the male japanese quail. individual samples were taken at 15-min intervals for blocks of time during the day or night. serum testosterone concentrations did not vary significantly between 1100 and 1600 hr. comparison of fluctuations in serum testosterone between 1300 to 1430 hr and 0100 to 0230 hr again revealed no significant change during the day, and a h ... | 1983 | 6683839 |
| experimental analysis of control mechanisms in somite segmentation in avian embryos. i. reduction of material at the blastula stage in coturnix coturnix japonica. | the blastulae of unincubated eggs of the quail, coturnix coturnix japonica, have been bisected in ovo, using the technique of lutz (1949). some embryos were harvested after 24 h and found to possess two primitive streaks. most were fixed at 48 h or 72 h. some were found to have regulated to form almost normal single axes, whilst others had developed into duplicitas anterior embryos, separate twins or collided axes. all three types of twinned embryos were smaller than the control embryos. the num ... | 1983 | 6684143 |
| grouping in japanese quail. 1. agonistic behavior during feeding. | agonistic behavior in male japanese quail, shown by aggressive pecking after feed restriction, was potentiated in unstable groups (a visitor bird moved to a new cage containing an unfamiliar resident each 24-hr period) but not in stable (a pair that was never changed once the birds were placed in cages) groups. the resident quail were more aggressive than either visitors or individuals of the stable groups. ambivalent behavior (behavior characterized by an aggressive action followed immediately ... | 1983 | 6685287 |
| mating frequency in male japanese quail: crosses among selected and unselected lines. | the genetics of mating behavior in japanese quail was investigated in replicated lines selected for high or low number of completed matings and the random bred control which served as the base population for the selected lines. comparisons involved the parental lines, f1, f2, and backcross generations. results indicate that mating frequency is influenced by additive and nonadditive genetic variation with the former being the primary heritable influence. the relationships between mating behavior, ... | 1983 | 6686079 |
| relative potencies of testosterone and 5 alpha-dihydrotestosterone on crowing and cloacal gland growth in the japanese quail (coturnix coturnix japonica). | it has been suggested that testosterone is less effective at inducing crowing behaviour in young birds than in adults because of the presence of higher levels of steroid 5 beta-reductase in the young brain, which converts testosterone to inactive 5 beta-reduced metabolites. this hypothesis was tested indirectly by comparing the relative potencies of 5 alpha-dihydrotestosterone (5 alpha-dht), which cannot be converted to 5 beta-metabolites, and testosterone at inducing crowing in young gonadectom ... | 1984 | 6690644 |
| development of the oviduct in quail during sexual maturation in relation to plasma concentrations of oestradiol and progesterone. | the macromolecular content (dna, soluble proteins and ovalbumin) of the magnum and the plasma concentrations of oestradiol and progesterone were studied during sexual development of the japanese quail. rapid growth and differentiation of the magnum began between 21 and 28 days of age and rapidly reached the laying stage in about 20 days. this rapid change in magnum size occurred in a stepwise manner: cellular proliferation was observed first, followed by the synthesis and accumulation of specifi ... | 1984 | 6693828 |
| episodic release of lh in gonadectomized male japanese quail. | blood samples were taken every 15 min (for 4.75 h) from six castrated quail on three separate occasions. the birds were first bled while under short days (comprising 8 h light : 16 h darkness per 24 h; 8l : 16d) and, subsequently, after 1 and 20 days under long days of 16l : 8d. the photoperiodic alteration produced a marked increase in the mean plasma lh concentration of each bird and in four instances the rise was evident after only 1 long day. pulsatile release patterns were not detected in t ... | 1984 | 6693830 |
| comparative analysis of the development of wing-flapping and flight in the fowl. | the development of wing-flapping rate, lateral flight, wing area, and the ratio of wing area to body weight are described in the japanese quail (coturnix coturnix japonica) and three chickens (gallus gallus) to determine common developmental phenomena and to assess the effects of domestication. the chickens were the white leghorn (a commercial egg producer), the cornish x rock (a commercial meat producer), and the red jungle fowl (the probable ancestor of domestic chickens). all birds performed ... | 1984 | 6698309 |
| concentration of orally administered and chronically fed 95mtc in japanese quail eggs. | a chronic feeding study using 95mtc incorporated into alfalfa and an acute study where 95mtc was amended to alfalfa showed that about 8.4% of ingested tc was transferred to eggs. after 10 days of chronic feeding, 80% of the tc was in yolk, 20% in albumin and less than 1% in shell and associated membranes. at necropsy, technetium concentrations in the three largest oocytes were nearly equal. the biological half-time for tc was about one to two days in acute studies. results from the chronic feedi ... | 1984 | 6698792 |
| mineral content of quail embryos cultured in mineral-rich and mineral-free conditions. | japanese quail embryos were cultured in mineral rich (mr) using chickens egg shell and mineral-free (mf) using saran wrap cultures after 2.5 days of normal incubation. in the mr culture, 82% of embryos survived beyond 14.5 days of incubation and 3 embryos out of 93 (3%) hatched. in the mf culture, 80% survived beyond 9.5 days and 59% beyond 14.5 days. mineral content (ca, mg, k, and na) of the embryos and of the residual matter within the egg (remaining egg contents excluding the embryo, shell, ... | 1984 | 6701139 |
| pathogenicity of coccidia in japanese quail (coturnix coturnix japonica). | coccidia were recovered from a field outbreak in commercially raised japanese quail from south carolina. after propagation in unmedicated quail, the culture was identified as a mixture of approximately 65% eimeria uzura, 33% e. tsunodai, and 2% e. taldykurganica. several pure cultures of e. uzura were obtained by single oocyst isolation. a micropyle was not present in all oocysts; thus, it is not a reliable taxonomic characteristic for identification of e. uzura. neither the mixed culture nor th ... | 1984 | 6701143 |
| morphological and ultrastructural aspects of the activation of avian medullary bone osteoclasts by parathyroid hormone. | the activation of physiologically inactive medullary bone osteoclasts by parathyroid hormone (pth) was examined using light and electron microscopy and histomorphometric methods. medullary bone osteoclasts are functionally inactive during the avian egg-laying cycle when an egg shell is not being calcified in the shell gland. japanese quail hens were given 0.5 iu/g pth and the medullary bone osteoclasts were examined up to 90 min later. administration of pth results in rapid changes in osteoclast ... | 1984 | 6703339 |
| growth hormone, thyroxine, and triiodothyronine levels of japanese quail selected for four-week body weight. | plasma growth hormone (gh), triiodothyronine (t3), and thyroxine (t4) levels were compared in four lines of japanese quail (c,p,t, and s) from 1 to 4 weeks of age in two experiments. lines p and t were derived from line c by 59 generations of selection for high 4-week body weight. line p was selected under the same nutritional regimen as line c (28% protein) while line t was selected under a restricted protein (20%) ration containing .2% thiouracil. line s was developed as a subline from t by co ... | 1984 | 6709562 |
| uterine relaxing action of parathyroid hormone: effect of oxidation and methionine substitution. | the effects of bpth-(1-34), oxidized bpth-(1-34),[nle8,nle18, tyr34] bpth-(1-34) amide, and oxidized [nle8,nle18,tyr34]bpth-(1-34)amide were tested in an in vitro rat uterine assay. when bpth-(1-34) was treated with hydrogen peroxide (h2o2), the ability of this peptide to reduce oxytocin-stimulated uterine contraction in vitro was no longer evident. an analogue of bpth-(1-34), in which the methionines at positions 8 and 18 were replaced with norleucine ([nle8,nle18,tyr34]bpth-(1-34)amide), was c ... | 1984 | 6709644 |
| effect of acute stress on catecholamine content in the hypothalamic nuclei of japanese quail. | concentration of noradrenaline, adrenaline and dopamine in eight hypothalamic nuclei or areas (nucleus hypothalamicus medialis anterior, n. periventricularis magnocellularis, n. hypothalamicus lateralis anterior, n. hypothalamicus medialis posterior, n. hypothalamicus lateralis posterior, eminentia medialis, n. tuberis, area hypothalamica posterior) have been determined by a sensitive radioenzymatic micromethod in male japanese quail restrained for 30 min. in control quail the highest concentrat ... | 1984 | 6713235 |
| genetics of heat tolerance in japanese quail. | two experiments were conducted to assess the genetics of heat stress survival time (hsst) and its relationship to body weight (bw) in japanese quail. in experiment 1, japanese quail from the athens randombred population were used and estimations of heritability (h2) and genotypic correlation (rg) were based on half-sib relationships. three lines of japanese quail selected under different environments and the athens randombred line were studied in experiment 2. estimations of h2 and rg were based ... | 1984 | 6718296 |
| homotopic and heterotopic transplantations of quail tectal primordia in chick embryos: organization of the retinotectal projections in the chimeric embryos. | to study the adaptative capabilities of the retinotectal system in birds, the primordium of one optic tectum from 12-somite embryos of japanese quail was transplanted either homotopically , to replace the ablated same primordium, or heterotopically, to replace the ablated dorsal diencephalon in white leghorn chick embryos of the same stage. the quail nucleolar marker was used to recognize the transplants. the cytoarchitecture of the tecta and the retinal projections from the eye contralateral to ... | 1984 | 6724134 |
| body weight and composition of japanese quail (coturnix coturnix japonica) at sexual maturity. | the influence of dietary protein (26%, 24%, 20%, 16%, and 14%) and restricted feeding (100%, 80%, and 60% of ad libitum) on body weight and body composition of japanese quail (coturnix coturnix japonica) at sexual maturity was examined in two similar experiments. although less variable than chronological age, body weight at sexual maturity also differed significantly. in experiment 1, there were no significant differences in breast weight, tibia length or carcass fat due to diet. in experiment 2 ... | 1984 | 6724330 |
| selective breeding for high and low antibody responses to inactivated newcastle disease virus in japanese quails. | two lines of japanese quail were divergently selected for high and low antibody responses after being twice injected at 4 and 6 weeks of age with inactivated newcastle disease virus antigen. after seven generations of selection, the serum antibody level in the high line was 24% greater than the level in the unselected control lines, whereas the low line antibody level was approximately 37% less than that in the control line. the estimated heritability (h2s + d) was approximately .12 +/- .50. the ... | 1984 | 6728759 |
| age and body weight at sexual maturity in female white leghorn chickens. | age and body weight at sexual maturity were measured in females from two lines of white leghorns known to differ in these traits. within-line correlations between age and body weight at sexual maturity were not different from zero. the data demonstrated that egg-type chickens must reach a minimum age and body weight before commencing egg production - results consistent with those obtained for meat-type chickens and japanese quail. | 1984 | 6728783 |
| body size, reproductive behavior, and fertility in three genetic lines of japanese quail. | the influences of body size on early locomotor activity, intermale aggression, mating behavior, fertility, and hatchability were studied in three lines of japanese quail. lines p and c originated from the same base population with p selected for high 28-day body weight and c maintained as a randombred population. line s was a randombred line unrelated to p and c. line p quail were larger than both c and s quail, which were similar in size and had proportionally larger cloacal glands than those f ... | 1984 | 6728793 |
| a comparison of the distributions of the actinides uranium and thorium with the lanthanide gadolinium in the tissues and eggs of japanese quail: concentrations of uranium in feeds and foods. | japanese quail were given ucl3 , uo2 (no3)2, th(no3)4, or gdcl3 ( 153gd -labeled) intravenously in aqueous solution. distribution of th among the tissues was as for gd; distributions of u(iii) and u(vi) were markedly different. for example, 18 hr after a 1.5 mumol/100 g dose, accumulations in females were: growing oocytes, u(iii) 2.0%, u(vi) 2.4%, th 27.7%, gd 44.7%; leg bones, u(iii) 12.5%, u(vi) 14.1%, th 1.2%, gd 1.4%; liver, u(iii) 1.1%, u(vi) 1.1%, th 44.0%, gd 40.2%. whole body losses by 1 ... | 1984 | 6728797 |
| effects of zinc, iron and copper deficiencies on cadmium in tissues of japanese quail. | experiments with young japanese quail were conducted to determine whether combined moderate deficiencies of zinc, iron and copper would cause greater uptake and tissue retention of cadmium than the single deficiencies. birds were fed the experimental diets containing 62 ppb cadmium from hatching to 16 days of age. on day 9 each bird received a dose of 109cdcl2 in its diet. on day 10, the duodenal and jejunal-ileal tissues contained large amounts of cadmium, and there were many significant effect ... | 1984 | 6734571 |
| the binding of estrogen to liver nuclei from japanese quail. | specific binding sites for estrogen were characterized in liver nuclei from adult japanese quail. a single class of high-affinity binding sites (kd = 2 x 10(-10) m) was revealed by saturation analysis using an exchange assay. estradiol (e2), estrone, and estriol competed effectively with [3h]e2 for the nuclear binding sites but progesterone and testosterone were ineffective. the concentration of sites was 0.15 +/- 0.05 pmol/mg dna (mean +/- 1 sd) in sexually immature females and 0.47 +/- 0.11 pm ... | 1984 | 6735163 |
| effects of ventricularly implanted sex steroids on calling and locomotor activity in castrated male japanese quail. | to clarify the different actions of steroid hormones on calling and locomotor activity, minute pellets of steroid hormones were stereotaxically implanted into the third ventricle of castrated japanese quail. testosterone (t) pellets were effective in inducing calling to about 60% of that observed in castrated quail given subcutaneous implants of t. however, implants of 5 alpha-dihydrotestosterone (5 alpha-dht) were completely ineffective and effectiveness of estradiol-17 beta (e2) was very sligh ... | 1984 | 6735366 |
| 5 beta-reductase activity in the brain and cloacal gland of male and female embryos in the japanese quail (coturnix coturnix japonica). | testosterone metabolism was studied by an in-vitro technique in the brain and cloacal gland of young male and female quail at different ages ranging from 7 days of incubation to 2 days after hatching. very active metabolism, leading almost exclusively to the production of 5 beta-reduced compounds, was observed. 5 beta-reductase activity remained high throughout the incubation period in the hypothalamus, decreased around the time of hatching in the cerebellum and decreased progressively between d ... | 1984 | 6736853 |
| the synchronisation of hatching in quail embryos: aspects of development affected by a retarding stimulus. | one hundred twenty-eight quail embryos were tested in 33 groups. in each group one egg was stimulated with sounds at a rate known to delay hatching (0.9 clicks/second). in groups of bobwhite quail, stimulation began three days or two days before hatching, and three days before hatching in groups of japanese quail. all eggs were incubated separately and respiration was monitored to indicate 1) the onset of lung ventilation, 2) the time when the egg began to click, and 3) the hatching time. in one ... | 1984 | 6736887 |
| protein polymorphism in two populations of the wild quail coturnix coturnix japonica. | to evaluate genetic variability in two populations of the wild quail coturnix coturnix japonica, proteins and enzymes were examined by starch gel electrophoresis. rare variants so far not observed in domestic quail were found in the following five enzymes; aspartate aminotransferase, acid phosphatase, pancreatic esterase, isocitrate dehydrogenase and lactate dehydrogenase. the proportion of polymorphic loci (p poly) and the expected average heterozygosity (h) in one of the two populations were e ... | 1984 | 6742511 |
| toxicologic studies with japanese quail fed winter wheat grown on municipal sludge-amended soil. | 1984 | 6742891 | |
| motion sickness in quail: body-rotation-induced conditioned fluid aversions in c. coturnix japonica. | the presence of motion sickness in japanese quail (c. coturnix japonica) was examined by using a conditioned fluid aversion as an index. twenty-three birds were divided into three groups. one group received a novel fluid (yellow-sour water) followed by 30 min of body rotation at 70 rpm (on a schedule of 15 s on and 5 s off). another group received the novel fluid followed by exposure to a sham rotation procedure. the third group experienced the rotation procedure following access to water. the g ... | 1984 | 6744814 |
| morphology and behavior of quail neural crest cells in artificial three-dimensional extracellular matrices. | neural crest cells migrate extensively through a complex extracellular matrix (ecm) to sites of terminal differentiation. to determine what role the various components of the ecm may play in crest morphogenesis, quail (coturnix coturnix japonica) neural crest cells have been cultured in three-dimensional hydrated collagen lattices containing various combinations of macromolecules known to be present in the crest migratory pathways. neural crest cells migrate readily in native collagen gels where ... | 1984 | 6745490 |
| effect of embryonic treatment with oestradiol benzoate on reproductive morphology, ovulation and oviposition and plasma lh concentrations in female quail (coturnix coturnix japonica). | quail eggs were injected on day 10 of incubation with 0, 5, 10, 20 or 40 micrograms oestradiol benzoate. females hatching from these eggs were reared on a 16l: 8d photoperiod and egg laying was recorded. blood samples were taken at 37, 40, 43, 46, 49, 52, 55, 58 or 61 days of age and lh concentrations were measured by a double-antibody radioimmunoassay. birds were killed at 61 days of age; ovaries and oviducts were weighed and examined. egg laying was greatly reduced by oestradiol benzoate treat ... | 1984 | 6747950 |
| crystallographic refinement of japanese quail ovomucoid, a kazal-type inhibitor, and model building studies of complexes with serine proteases. | 1982 | 6752426 | |
| hormonal stimulation of myoblast differentiation in the absence of dna synthesis. | the role of dna synthesis in the final stages of muscle cell differentiation has been a subject of controversy for more than a decade. in an attempt to resolve disagreements over the necessity for a unique (or "quantal") mitosis just prior to the conversion of proliferating myoblasts to form postmitotic myotubes, we have studied the effects of insulin and somatomedin on the stimulation of myoblast differentiation with or without dna synthesis. under conditions in which at least 95% of [3h]thymid ... | 1982 | 6753603 |
| purificaton and characterization of a pepsinogen and its pepsin from proventriculus of the japanese quail. | a crude extract of the proventriculus of the japanese quail gave at least five bands of peptic activity at ph 2.2 on polyacrylamide gel electrophoresis. the main component, constituting about 40% of the total acid protease activity, was purified to homogeneity by hydroxyapatite and deae-sepharose column chromatographies. at below ph 4.0, the pepsinogen was converted to a pepsin, which had the same electrophoretic mobility as one of the five bands of peptic activity present in the crude extract. ... | 1980 | 6766746 |
| neuroendocrine regulation of gonadotrophin-releasing hormone secretion in the japanese quail. | 1980 | 6767641 | |
| role of testosterone and of its metabolites in regulating gonadotrophin secretion in the japanese quail. | in the japanese quail gonadal steroids can depress plasma levels of lh and fsh. since it is now accepted that testosterone metabolites may be metabolized to the tissue-active forms of the hormone, the in-vitro tissue incubation has been combined with steroid replaement therapy in vivo to investigate the physiological roles of various testosterone metabolites as inhibitory feedback agents on gonadtorophin secretion in quail. after the incubation of quail pituitary glands for 3 h with labelled tes ... | 1980 | 6767799 |
| a ser162/gly162 polymorphism in japanese quail ovomucoid. | japanese quail ovomucoid exists in two polymorphic forms. one has serine, the other glycine at position 162. the tryptic peptide corresponding to positions 160 to 164 was purified from ovomucoids isolated from egg whites of eggs laid by 11 different hens and subjected to amino acid analysis. the quantitative distribution of serine and glycine in this pentapeptide is consistent with the interpretation that the ovomucoid gene exists in two codominant allelic forms at one locus. even though the gen ... | 1980 | 6771272 |
| aorta elastin turnover in normal and hypercholesterolemic japanese quail. | the turnover and degradation of mature elastin from the aortae of japanese quail were estimated following injection with l-[u-14c]lysine by measuring the changes in specific activity of l-[u-14c]lysine and 14c-labelled desmosine and isodesmosine (crosslinking amino acids derived from lysyl residues) in elastin over a 39-week period. only 5% of the variation in radioactivity could be attributed to changes in time. therefore, it was concluded that the best estimates of mature elastin turnover are ... | 1980 | 6772235 |
| effect of changing photoperiod on plasma thyroxine-binding prealbumin in japanese quail (coturnix coturnix japonica). | 1980 | 6773850 | |
| uptake of retinol, retinol-binding protein and thyroxine-binding prealbumin by egg yolk of japanese quail. | 1980 | 6774902 | |
| difference of japanese quail lh-rf from mammalian lh-rf revealed by biological and immunochemical studies. | 1980 | 6774913 | |
| changes in plasma concentrations of thyroxine binding prealbumin and retinol binding protein in japanese quail after hatching. | 1. male and female japanese quail (coturnix coturnix japonica) were reared under short daily photo-periods (8 h light-16 h dark) to inhibit sexual development with free access to food and water. blood was sampled at frequent intervals for 13 weeks from hatching in order to monitor the developmental changes in plasma concentrations of the two proteins which are important in the transport of retinol, retinol-binding protein (rbp) and thyroxine-binding prealbumin (tbpa). 2. measurements of body-wei ... | 1980 | 6776983 |
| [the effect of the herbicide dinoseb-acetate (aretit) on transaminase (got, gpt) activity in the blood serum and muscles of the japanese quail (coturnix coturnix japonica)]. | an experiment was undertaken to study the effect of the dinoseb-acetate (aretit) herbicide, administered in drinking water at a concentration of 100 and 200 mg x 1(-1) for four days, on the activity of transaminases (got and gpt) in the blood serum and muscle of the japanese quail (coturnix coturnix japonica). got had higher activity values in the blood serum and muscle of the control and test birds, as compared with gpt. the herbicide increases got activity in the blood serum, whereas the gpt v ... | 1980 | 6777953 |
| photoinducible phase for gonadotropin secretion entrained to dawn in japanese quail. | 1981 | 6785147 | |
| the effects of ortho chloro substituents on the retention of pcb isomers in rat, rabbit, japanese quail, guinea pig and trout. | a mixture of 2,2',4,4',6,6'-,2,2',4,4',5',6-,2,2',4,4',5,5'-,2',3,4,4',5,5'- and 3,3',4,4',5,5'-hexachlorobiphenyls (hcbp) was administered by gastric lavage to rats, guinea pigs, rabbits, japanese quail and trout, and the concentrations in the fat or whole carcass were determined after 29 days. the total hcbp levels in rat, rabbit and guinea pig fatty tissue were 8.27, 6.84 and 4.74 ppm, respectively: whereas 3.02 and 2.15 ppm of the hcbps were detected in the trout and japanese quail carcasses ... | 1980 | 6794188 |
| accumulation of polychlorinated biphenyls in steroidgenic tissue of gonads and adrenals in japanese quail. | female quail exhibited a high uptake of pcb in the yolk of growing follicles, in the thecal gland cells and the medullary interstitial tissue of the ovary and in the postovulatory and atretic follicles. uptake in the shell gland was low. an elimination study of four days indicated that the major part of pcb is excreted via the eggs. male quails showed a very low uptake of pcb in the testes and no accumulation was in the interstitium. the uptake in the fat, liver, and adrenals was similar to that ... | 1981 | 6798943 |
| photoperiodic modulation of gonadotrophin secretion in castrated japanese quail. | male japanese quail were castrated when sexually immature and immediately exposed to one of the following stimulatory lighting regimes for 52 days: 11 h light: 13 h darkness/day (11l : 13d), 12l : 12d, 13l : 11d, 14l : 10d, 15l : 9d, 16l : 8d, 20l : 4d or 23l : 1d. one group was retained on short days (8l : 16d). clearcut differences in the plasma levels of lh and fsh emerged between the various groups. levels remained very low in castrated quail on 8l : 16d but were much greater in those on 14l ... | 1982 | 6799607 |
| effect of artificial photoperiods on plasma thyroxine-binding prealbumin and retinol-binding protein in japanese quail. | 1982 | 6801168 | |
| hypothalamic secretion of thyrotrophin releasing hormone is decreased in male japanese quail exposed to long daily photoperiods. | adult male japanese quail held under short daily photoperiods (8 h light: 16 h darkness; 8l: 16d) had significantly higher plasma concentrations of thyroid-stimulating hormone (tsh), tri-iodothyronine (t3) and thyroxine (t4) than did those kept under long days (16l:8d). when given a single s.c. injection of 50 microgram thyrotrophin releasing hormone (trh) the birds held under both the 8l: 16d and 16l: 8d photoperiods showed rapid increases in their blood concentrations of tsh, t4 and t3, the am ... | 1982 | 6801171 |
| [the effect of water soluble trichloromonofluoromethane freon on the weight and proteins of the heart muscle in japanese quail]. | an experiment was conducted to study the effects of water-soluble trichloromonofluoromethane freon (f-11, cc13f) on the weight of heart and on the level of freely extractable proteins in the heart of japanese quail (coturnix coturnix japonica). after three-week sublethal exposure of japanese quail to the effect of freon the heart weight of the tested birds was found to have markedly decreased (however, the total body weight of the birds did not decrease). the tested quail also showed pronounced ... | 1982 | 6803425 |
| decreased transference of 153gd into the oocytes of japanese quail given ethylenediaminetetraacetate. | 1982 | 6806794 | |
| hormonal regulation of iodine accumulation in ovary and thyroid of japanese quail. | 1982 | 6807749 | |
| cytology and autoradiography of estrogen-induced differentiation of avian endosteal cells. | the endosteal reaction, the initial step in the formation of medullary bone, was investigated in femurs of estrogen-treated male japanese quail. morphologically, the endosteal cells were in an undifferentiated state until 30 h after estrogen treatment and showed characteristics resembling those of resting cells. many preosteoblasts were seen on the endosteum at 33 h, whereas mitotic figures and fully differentiated osteoblasts were recognized at 36 h after estrogen. the mitotic figures were obse ... | 1982 | 6814725 |
| effect of corticosterone on the hypothalamic-pituitary-gonadal system of male japanese quail exposed to either short or long photoperiods. | 1982 | 6816883 | |
| effects of ddt, polychlorinated biphenyls and thiouracil on circulating thyroid hormones, thyroid histology and eggshell quality in japanese quail (coturnix coturnix japonica). | 1982 | 6817931 | |
| ipsilateral retinal projections in japanese quail, coturnix coturnix japonica. | ipsilateral retinal projections were investigated in japanese quails by means of the fink-heimer method after retinal extirpation, and by means of direct injection of horseradish peroxidase or cobalt ion-tophoresis into the optic nerve. ipsilateral projections were found in the nucleus lateralis anterior thalami, nucleus dorsolateralis anterior thalami pars lateralis, nucleus geniculatus lateralis pars ventralis, nucleus lentiformis mesencephali pars magnocellularis and nucleus ectomamillaris. n ... | 1983 | 6824967 |
| effects of dietary zinc, manganese, and copper on tissue accumulation of cadmium by japanese quail. | the beneficial effects of a combined dietary supplement of zn, cu, and mn in decreasing cd absorption was previously reported. the purpose of this study was to investigate the individual and combined effects of these three elements. in the first two experiments, day-old japanese quail were fed basal diets containing either requirement amounts of zn (30 ppm) and mn (12 ppm) and slightly above requirement levels of cu (5 ppm). from day 7 birds were fed either the basal diet or diets containing com ... | 1983 | 6828451 |
| in vitro synthesis of proteoglycans associated with medullary bone in japanese quail. | a short-term incubation system was used to study proteoglycan synthesis during the early stages of medullary bone formation in estrogen-treated male japanese quail. the proteoglycans were separated by chromatography on a deae bio-gel a column eluted with a 400-ml 0-1 m nacl gradient. the profile from uninjected control birds showed a single peak, whereas profiles from estrogen-treated birds showed development of another peak. incorporation of [35s]sulfate into the estrogen-induced proteoglycan i ... | 1983 | 6830238 |
| modification of arterial elastin in vivo. effects of age and diet on changes in the n-terminal amino acid content of aorta elastin. | we have previously demonstrated that aorta elastin, a highly crosslinked protein, does not undergo turnover that is easily measured in vivo. therefore, it was hypothesized that when proteolysis of elastin occurs, a positive increase in n-terminal amino acids should result. such an increase would represent elastin-derived fragments held covalently in situ. a cyanate carbamylation procedure was used to estimate the changes in n-terminal amino acids in aorta elastin. to provide tissue for the studi ... | 1983 | 6830816 |
| circulating corticosterone responses of feed and water deprived broilers and japanese quail. | experiments were conducted to delineate the acute stress response of commercial broilers to feed and water deprivation for 10 hr. the effect of method of nutrient deprivation, cooping versus removal of feed and water from broiler floor pens, was also considered. bihourly plasma corticosterone measures were made during 10-hr withdrawal periods, and significant alterations in this adrenal steroid were considered indicative of stress. in all studies, feed and water deprivation produced significant ... | 1983 | 6835905 |
| circulating corticosterone response of wild-type japanese quail to albino quail intrusion. | two experiments were conducted to determine the ability of albino japanese quail intruders to elicit serum corticosterone responses in established populations of wild-type (w-t) quail. in experiment 1, w-t quail were mixed with albino strangers and blood sampled prior to (t0) and 2 hr after (t2) mixing. a second w-t group, serving as a control, was bled at these same times but was not subjected to albino intrusion. in experiment 2, a similar protocol was followed, except albino treated and contr ... | 1983 | 6835906 |
| the effects of 1,1-di(p-chlorophenyl)-2-chloroethylene (ddmu) on hepatic morphology of japanese quail. | the effects of dietary administration of 1,1-di(p-chlorophenyl)-2-chloroethylene (ddmu) to japanese quail at a concentration of 100 ppm were investigated for periods of up to 32 days. hepatic morphology was studied by light microscopy. histologic changes observed included cytoplasmic and nuclear degeneration in the hepatocytes followed by severe lipid accumulation and hepatocellular hypertrophy. there was a progressive increase in cytoplasmic vacuoles containing lipid up to day 24 followed by a ... | 1983 | 6836573 |
| evidence of genetic differences in acute hypoxia survival. | in a population of japanese quail, a genetic selection was performed leading to two strains--one resistant and one susceptible to an acute hypoxic nitrogen challenge as well as to an acute carbon monoxide intoxication. crossing these two strains gives an f1 hybrid whose survival to acute hypoxia appears to be very close to the susceptible strain. the difference in acute hypoxic survival already appears in embryos at the age of 12 d. susceptibility to acute hypoxia seems to be a dominant characte ... | 1983 | 6838448 |
| recovery of acetylcholinesterase forms in quail muscle cultures after intoxication with diisopropylfluorophosphate. | studies of recovery of acetylcholinesterase (ache, ec 3.1.1.7) after inhibition by organophosphates (ops) have been hampered by the low number of in vitro systems with large collagen-tailed forms of ache characteristic of motor end plates. pectoral muscle cultures from japanese quail with high levels of a large 20s form of ache were used to study recovery of cells from acute treatment with diisopropylfluorophosphate (dfp), an irreversible ache inhibitor. low molecular weight ache forms were synt ... | 1983 | 6838637 |
| an experimental study of the somitomeric organization of the avian segmental plate. | the segmental plate mesoderm of chicken and japanese quail embryos hh stages 9 to 16 was studied with scanning electron microscopy (sem) imaging. the segmental plates were found to exhibit a metameric pattern consisting of tandemly stacked somitomeres. it was found that the numbers of somitomeres in segmental plates removed from the same embryo were nearly identical. furthermore, the number of somitomeres in a segmental plate was found to be quite consistent (10.0 +/- 1.5) and independent of the ... | 1983 | 6840398 |
| development of cultured quail embryos. | japanese quail embryos were cultured by a plastic wrap technique after 2.5 days of normal incubation, and their development was investigated. mean survival time was 13 days (2.5 days of preincubation plus 10.5 days of experimental culture). mean morphological stage shown by the cultured embryos was stage 28 of zacchei (1961) (corresponding to 11 days of normal incubation) and the maximum stage of development was stage 31 (corresponding to 14 days of normal incubation). in the latter half of incu ... | 1983 | 6844217 |
| variations in the photoperiodic cloacal response of japanese quail: association with testes weight and feather color. | the size of the cloacal gland was found to be a reliable indicator of testicular activity of japanese quail. six experiments were performed to examine the effects of alternating long and short photoperiod on the size of the cloacal gland of male japanese quail. three types of photoperiodic cloacal responses were distinguished. type i birds became refractory to short photoperiods after they had experienced 5 weeks or more of short days. they maintained large cloacal glands under subsequent condit ... | 1983 | 6852518 |
| magnesium stores and anemia in young japanese quail. | studies were conducted to determine the effect of age on magnesium requirement and whether high dietary magnesium during the first 7 days of life would protect against subsequent magnesium deficiency. day-old japanese quail were fed a casein-gelatin diet containing either 300 (requirement) or 600 ppm mg. beginning on day 7, half of the birds in each group received either 160 (deficient) or 300 ppm mg. in birds fed the requirement level during week 1 followed by the deficient diet, hemoglobin dec ... | 1983 | 6854412 |
| adrenergic and cholinergic activity of the japanese quail oviduct in vitro. | the responses to isoprenaline, phenylephrine, and carbachol in different segments of isolated intact oviduct were studied. smooth muscle electrical activity was recorded with suction electrodes placed, one electrode in each, in the infundibulum, proximal magnum, distal magnum, isthmus, shell gland, and vagina. the drugs were added cumulatively. only in the magnum did isoprenaline cause a significant change in the frequency of spike discharges; the decrease was about 20%. the effects of phenyleph ... | 1983 | 6866902 |
| the effects of testosterone and its metabolites on sexual behavior and morphology in male and female japanese quail. | adult japanese quail are sexually dimorphic. even when implanted with testosterone (t), ovariectomized females fail to copulate and their cloacal glands are smaller than those of males. this may be due to a reduced capacity of the females to transform testosterone into active metabolites (estradiol-17 beta and 5 alpha-dihydrotestosterone). indeed, in the male quail, estradiol-17 beta (e2) activates copulation whereas 5 alpha-dihydrotestosterone (5 alpha-dht) activates crowing, strutting and the ... | 1983 | 6867131 |
| [ca-p interaction at the nutritional and bone levels in male quail (coturnix coturnix japonica)]. | five experiments were conducted in which various levels of calcium (ca) and phosphorus (p) were fed to adult male quail (diets d-1: ca = 1.54%, p = 0.80%; d-2: ca = 3.20%, p = 0.81%; d-3: ca = 1.57%, p = 1.66%; d-4: ca = 3.40%, p = 1.71%; d-5: ca - 2.20%, p = 0.81%). the interaction between ca and p, and the effect on some nutritive hematic and osseous parameters were investigated for each diet. feeding high p caused a body weight decrease in d-4 adult quail (p less than 0.05) and diminished foo ... | 1983 | 6867439 |
| [physicochemical characteristics of a vaccinal strain of the leningrad-3 mumps virus (l-3)]. | purified virions of the vaccine strain leningrad-3 of mumps virus propagated in japanese quail embryo cell cultures had a buoyant density 1.18-1.19 g/ml in sucrose gradient, contained 50 s rna and showed variable sizes in electron microscopy as manifested by heterogeneity of the virus zone in sedimentation analysis. purified l-3 virus contained 5 major polypeptides with molecular weights of 74,000, 68,000, 58,000, 45,000, and 39,000 daltons. each polypeptide had an individual oligopeptide compos ... | 1983 | 6868562 |
| interaction between trypsin-like enzyme from streptomyces erythraeus and japanese quail ovomucoid. | we examined the interaction between a trypsin-like enzyme from streptomyces erythraeus (tle-se) and japanese quail ovomucoid (qo) as a model of the interaction between a serine protease and a kazal-type inhibitor. both the second domain (domain ii) and the third domain (domain iii) of qo inhibited tle-se. but there was a great difference in the apparent association rate constant (kappa a) between domain ii and domain iii at ph 8.0 (the optimum ph of the enzymatic activity), and domain iii associ ... | 1983 | 6874672 |
| phase shifts in circadian rhythmicity of total, free corticosterone and transcortine plasma levels in hypothyroid male japanese quails. | control, radiothyroidectomized, and methimasol-treated short day (6l:18d; beginning of light at 0700) male japanese quails were studied with regard to their circadian rhythmicity of total, free corticosterone and transcortine plasma level. in the controls, the peak of total and free corticosterone coincided with the maximal corticosterone binding capacity of transcortine; these parameters can be characterized by similar daily rhythm. in hypothyroid birds a synchronous phase shift of these parame ... | 1983 | 6884753 |
| age-related reproductive decline in the male japanese quail. | a series of experiments was conducted to study the decline in reproduction associated with age in the male japanese quail. in experiment 1, eggs were collected from pairs that were 28, 56, 107, and 149 weeks of age. pairs that were 56 weeks of age or older showed a sharp drop in fertility and hatchability. subsequent experiments were designed to study the endocrine and behavioral basis for this decline in the male. in experiment 2, males that were between 23 and 70 weeks of age were tested for m ... | 1983 | 6885007 |
| ultrastructural aspects of dental tissues and their behavior in xenoplastic association (lizard quail). | ultrastructural characteristics of tooth buds of the polyphyodont adult lizards liolaemus tenuis and liolaemus gravenhorsti have been elucidated. xenoplastic combinations of lizard whole tooth buds and neural crest cells from embryos of the quail coturnix coturnix japonica have been cultured in vitro. mesenchymal cells (preodontoblasts) of lizard teeth early develop filopodia that contact the basal lamina. fragments of quail neural crest isolated by dissection were recombined with isolated lizar ... | 1983 | 6887261 |
| effects of sex steroids on calling, locomotor activity, and sexual behavior in castrated male japanese quail. | 1982 | 6889567 | |
| teratogenicity of parathion 29 wp in japanese quail, pheasant and chicken embryo. | 1981 | 6892187 | |
| teratogenic studies of captan on japanese quail and pheasant embryos. | 1981 | 6892188 | |
| [tolerance of mebendazole, fenbendazole, thiabendazole, cambendazole and febantel in relation to egg-laying capacity, egg quality, fertility and hatch rate of quail (coturnix coturnix japonica)]. | 1981 | 6895027 | |
| interactions of vitamin c with lead and mercury. | ascorbic acid has been found to interact with several elements in such a manner as to render them less available for animals. this property of the vitamin has a negative effect on the animals fed a copper-deficient diet, but a positive effect on those fed toxic levels of copper, selenium, vanadium, and cobalt. the effect of ascorbic acid in alleviating cadmium toxicity has been attributed to the effect of the vitamin on iron metabolism, since ferrous iron will also alleviate cadmium toxicity in ... | 1980 | 6940480 |
| efficacy of nickel ferrocyanide-anion exchange resin for reducing egg contamination with 137cs in laying japanese quails. | 1980 | 6968741 | |
| the regulation of 25-hydroxycholecalciferol metabolism in the kidney of japanese quail (coturnix coturnix japonica) by sex hormones and by parathyroid extract. | 1981 | 6973503 | |
| immunity in late juvenile and young adult japanese quail as related to microwave radiation during embryogeny. | 1982 | 6984437 | |
| [growth of japanese quail embryo cell cultures on deae-sephadex a-50 microcarrier]. | the growth of japanese quail embryo cells on deae-sephadex a-50 microcarrier was studied, and the growth of the cells on different microcarriers was compared. under the optimal conditions of microcarrier proceedings quail fibroblast cultures could be grown successfully on a microcarrier reaching a cell density per unit surface comparable to that in monolayer cell cultures. among the microcarriers tested: cytodex, biosylon and deae-sephadex a-50 treated by the author's method, the latter created ... | 2016 | 6999740 |
| the glycosaminoglycans of estrogen-induced medullary bone in japanese quail. | 1980 | 7008702 | |
| [glycogenosis ii in japanese quails]. | 1980 | 7009171 | |
| thyroid function in embryonic and perinatal japanese quail. | 1981 | 7014357 | |
| immunocytochemical localization of neurotensin-containing neurons in the hypothalamus of the japanese quail, coturnix coturnix japonica. | the hypothalamus of japanese quail, coturnix coturnix japonica, has been studied by means of the peroxidase-antiperoxidase immunocytochemical method, with the use of antibodies to synthetic neurotensin (nt). a number of immunoreactive neuronal perikarya occur in the medial preoptic nucleus of the rostral hypothalamus and a few in the accessory part of paraventricular nucleus and dorsal portion of the infundibular nucleus. some of them correspond to the parvocellular neurons previously identified ... | 1981 | 7018692 |
| a study on the toxicity and the biochemical effects of ethylene dibromide in the japanese quail. | 1. the acute oral ld50 and chronic lc50 toxicity values for ethylene dibromide (edb) were estimated for japanese quail. 2. single sub-acute oral and intraperitoneal doses of edb (1/2 ld50) and chronic oral doses of edb (1/3 lc50) were administered to quail in order to characterise the sub-lethal effects of edb residues. 3. at 24 h after sub-acute dosing, relative liver weight, plasma aspartate aminotransferase (at) [ec 2.6.1.1] and l-iditol (sorbitol) dehydrogenase (sdh) [ec 1.1.1.14] were eleva ... | 1981 | 7028216 |
| thermodynamics and kinetics of single residue replacements in avian ovomucoid third domains: effect on inhibitor interactions with serine proteinases. | sequence determinations in our laboratory have yielded the primary structures of ovomucoid third domains from 35 avian species. from that list, 12 sequences could be arranged into a contiguous set such that each sequence differs from a second by a single amino acid replacement. for this set of domains and for five additional domains of special interest, we report here the association equilibrium constants for their binding with bovine alpha-chymotrypsin, elastase i, and subtilisin carlsberg. the ... | 1982 | 7046785 |
| inhibition of myoblast differentiation in vitro by a protein isolated from liver cell medium. | we have recently discovered that cells of coon's buffalo rat liver (brl) line secrete a protein which is a potent inhibitor of skeletal myoblast differentiation in vitro. using ion exchange and molecular exclusion chromatography, we have prepared this protein, which we designate "differentiation inhibitor" (di), from the materials secreted by brl cells maintained in serum-free medium. it is a relatively heat-stable protein which is inactivated by treatment with trypsin and mercaptoethanol and ha ... | 1982 | 7047537 |
| decreased synaptic areas on purkinje spines in the cerebellar cortex of the mutant japanese quail, coturnix coturnix japonica. | 'dark frayed feather nervous disorder' (dn) is a neurological mutation in quails in which the cerebellar cortex is abnormally organized. purkinje cells are not aligned in a single row and show hypoplasia of the dendrites. the synapses between the parallel fibers and the spines of the purkinje cell dendrites were examined with the technique of serial sections in electron microscopy. the postsynaptic thickenings were obviously decreased in the mutant quail despite the same density and size of dend ... | 1982 | 7055694 |
| carbohydrate metabolism of hepatocytes from starved japanese quail. | 1982 | 7059176 | |
| chemical synthesis, biological activity, and metabolism of 25-hydroxy-24-oxovitamin d3. | 25-hydroxy-24-oxovitamin d3 (25(oh)24-oxo-d3), a metabolite of 25-hydroxyvitamin d3, has been chemically synthesized. the ultraviolet, mass, infrared, and proton nuclear magnetic resonance spectra of the 25(oh)24-oxo-d3 were identical with those of the natural product isolated from chick kidney incubates. the oxo compound showed biological activity similar to 24,25-dihydroxyvitamin d3 (24,25(oh)2d3) in vitamin d-deficient chicks in enhancing intestinal calcium transport and bone calcium mobiliza ... | 1982 | 7061507 |
| sexual differentiation of the photoperiodic response in japanese quail. | plasma levels of lh are generally higher in male than in female quail. this dimorphism was found to persist in quail which had been through a breeding cycle and then gonadectomized. under long daylengths (12 h light: 12 h darkness (12l: 12d) or 16l: 8d) ovariectomized quail had plasma levels of lh that were 55-70% of those seen in castrated birds. the difference was reduced after transfer to short days (8l: 16d) when lh concentrations fell to basal levels, but again became more pronounced when t ... | 1982 | 7061952 |
| method of determining the osmotic fragility curves of erythrocytes in birds. | the osmotic fragility of erythrocytes in 3 species of birds (gallus gallus domesticus, coturnix coturnix japonica, columba livia) and the rat was determined. the results of this study point to a smaller osmotic fragility. birds, with elliptical erythrocytes, have a lower osmotic fragility than species with round erythrocytes, like most of the mammals. | 1982 | 7062710 |