abstract：:Plasma aldosterone concentrations were markedly elevated in chickens by the removal of 10-30% of their total blood volume. This aldosterone response to haemorrhage was delayed and of reduced magnitude in birds pretreated for 48 hr with dexamethasone (100 micrograms/kg every 12 hr), in which the basal aldosterone level...

journal_title：General and comparative endocrinology

authors： Radke WJ,Albasi CM,Harvey S

更新日期：1985-11-01 00:00:00

abstract：:In immature ducklings injected with hypertonic saline the volume of extrarenal salt gland secretion was unaffected by prior treatment (immediately or 4 hr before salt loading) with long-lasting adrenocorticotrophin (ACTH 100 iu/kg, im) or exogenous corticosterone (1.0 mg/kg, im). Pretreatment with metyrapone, an 11-be...

journal_title：General and comparative endocrinology

authors： Harvey S,Phillips JG,Rees A

更新日期：1985-11-01 00:00:00

abstract：:The cortisol stress response in juvenile coho salmon, Oncorhynchus kisutch, considered as the difference between resting and peak poststress cortisol levels, increased from 80 ng/ml in March to 166 ng/ml in July, the period when smoltification normally occurs. Resting plasma cortisol levels also continually increased ...

journal_title：General and comparative endocrinology

authors： Barton BA,Schreck CB,Ewing RD,Hemmingsen AR,Patiño R

更新日期：1985-09-01 00:00:00

abstract：:This experiment was performed on two groups of male Japanese quail. One had been maintained in our laboratory as a closed colony (S-group), and the other had been obtained from a commercial source (R-group). Different responses of gonadal function were found between two groups following either testosterone treatment o...

journal_title：General and comparative endocrinology

authors： Konishi H,Wada M,Homma K

更新日期：1985-09-01 00:00:00

abstract：:The effects of epinephrine (E), norepinephrine (NE), phenylephrine (PHE), and isoproterenol (ISO) were studied in vivo on the blood pressure and heart rate of the conscious American bullfrog, Rana catesbeiana. Bullfrogs were chronically cannulated with a T cannula in the right sciatic artery. In warm-acclimated (22 de...

journal_title：General and comparative endocrinology

authors： Herman CA,Mata PL

更新日期：1985-09-01 00:00:00

abstract：:This study examines the regulation of thyroid activity in adult rough-skinned newts, Taricha granulosa. Aquatic, breeding-condition newts were hypophysectomized and were injected for 23 days with the mammalian adenohypophysial hormones: ACTH, PRL, and GH. During a fourth week of treatment, these newts also received TS...

journal_title：General and comparative endocrinology

authors： Specker JL,Brown PS,Brown SC

更新日期：1985-08-01 00:00:00

abstract：:Growth hormone (GH) cells were investigated with the protein A-gold technique on the pituitary glands of tilapia (Sarotherodon mossambicus) and amago salmon (Oncorhynchus rhodurus). By the use of specific antiserum against tilapia GH to both species, the immunoreactive gold particles were demonstrated to be preferenti...

journal_title：General and comparative endocrinology

authors： Ueda H,Kagawa H,Fujimoto S

更新日期：1985-07-01 00:00:00

abstract：:In anaesthetized young (6 weeks old) and adult (22-30 weeks old) domestic fowl, the administration of thyrotrophin releasing hormone (TRH; 1.0 micrograms/kg in young birds; 10.0 micrograms/kg in adults) or human pancreatic growth hormone-releasing factor (hpGRF(1-44)NH2; 10.0 micrograms/kg in both cases) markedly incr...

journal_title：General and comparative endocrinology

authors： Scanes CG,Harvey S

更新日期：1985-07-01 00:00:00

abstract：:Pinealectomized and intact chicks raised under cyclic (14L:10D) and noncyclic (OL;24L) conditions of environmental lighting were sampled 60 hr and 6 weeks after pinealectomy to evaluate the effects of pineal ablation on plasma and ocular melatonin concentrations. Little or no immunoreactive melatonin was present in pl...

journal_title：General and comparative endocrinology

authors： Osol G,Schwartz B,Foss DC

更新日期：1985-06-01 00:00:00

abstract：:Progesterone, 4-androstenedione, testosterone, dihydrotestosterone, 5 alpha-androstane-3 alpha,17 beta-diol (3 alpha-diol), 5 alpha-androstane-3 beta, 17 beta-diol (3 beta-diol), estrone, and estradiol levels were determined by radioimmunoassay in the different lobules of the testis of Salamandra salamandra throughout...

journal_title：General and comparative endocrinology

authors： Lecouteux A,Garnier DH,Bassez T,Joly J

更新日期：1985-05-01 00:00:00

abstract：:Fluctuations in plasma androgen (testosterone and 5 alpha-dihydrotestosterone), corticosterone (B), and luteinizing hormone (LH) of male bullfrogs in central California were measured during the spring mating season. Androgen and LH levels generally increased in the population prior to the initiation of chorusing and e...

journal_title：General and comparative endocrinology

authors： Mendonça MT,Licht P,Ryan MJ,Barnes R

更新日期：1985-05-01 00:00:00

abstract：:The distribution of melatonin was studied at midday and midnight in pigeon plasma, pineal, hypothalamus, eyes, Harderian glands, and duodenum. Tissue samples were homogenized, extracted with chloroform, evaporated, and measured by our melatonin radioimmunoassay (RIA). All the extracts gave dilution curves parallel to ...

journal_title：General and comparative endocrinology

authors： Vakkuri O,Rintamäki H,Leppäluoto J

更新日期：1985-04-01 00:00:00

abstract：:Plasma levels of corticosterone and aldosterone were determined by radioimmunoassay in ducks consuming diets containing different concentrations of sodium and potassium. Compared with control diet birds, maintenance on a high-Na+ diet for 5 days caused a 2-fold increase in the basal plasma corticosterone concentration...

journal_title：General and comparative endocrinology

authors： Klingbeil CK

更新日期：1985-04-01 00:00:00

abstract：:Y-Organs and control tissues from intact (intermolt) and 48-hr de-eyestalked Cancer antennarius donors were cultured for 12 and 24 hr in crustacean saline supplemented 10% with crab serum and containing [14C]cholesterol. Under these conditions, Y-organs took up significantly more [14C]cholesterol than ovary or muscle,...

journal_title：General and comparative endocrinology

authors： Watson RD,Spaziani E

更新日期：1985-03-01 00:00:00

abstract：:Follicular development and oocyte recruitment were studied in the ovaries of long-term (2 months) hypophysectomized frogs Rana cyanophlyctis during the postbreeding season (October/November). The effects of homoplastic pituitary pars distalis homogenate (PDH) (1 pituitary per frog), 40 IU pregnant mare serum gonadotro...

journal_title：General and comparative endocrinology

authors： Pancharatna M,Saidapur SK

更新日期：1985-02-01 00:00:00

abstract：:In addition to the previously recognised thyroid hormone-binding proteins, three plasma components possibly involved in T3 and T4 transport have been identified in chicken plasma using gel filtration at pH 7.4. In mature female, though not male and immature female birds, a significant amount of T3 (11%) is bound to ve...

journal_title：General and comparative endocrinology

authors： Mitchell MA,Stiles MS

更新日期：1985-02-01 00:00:00

abstract：:To investigate whether a differential potency on vitellogenesis exists between the carp gonadotropin (cGTH) and fraction I-cGTH (proteins from cGTH unbound on concanavalin A-Sepharose, which represent 5% of cGTH in weight), hypophysectomized Gobius niger were treated with the two hormonal preparations at the same leve...

journal_title：General and comparative endocrinology

authors： Le Menn F,Burzawa-Gérard E

更新日期：1985-01-01 00:00:00

abstract：:The effect of bursa of Fabricius on the endocrine function of the chick testis was studied using an isolated testis cell preparation. Testosterone secretion, both basal and under hCG stimulation, was measured in the incubation medium. The bursal extract inhibited the response of the testis cells to hCG detected as a r...

journal_title：General and comparative endocrinology

authors： Pedernera E,Aguilar MC,Romano M

更新日期：1985-01-01 00:00:00

abstract：:In female Paratelphusa, there appear to be two alternating dominant physiological tendencies, one biased in favor of reproductive (ovarian) growth and another biased in favor of somatic (regenerative) growth. Multiple limb autotomy (MA), long known to stimulate somatic growth, did so only if the crab was physiological...

journal_title：General and comparative endocrinology

authors： Kurup KN,Adiyodi RG

更新日期：1984-12-01 00:00:00

abstract：:The asymmetrical endostyle of Branchiostoma larvae contains two different zones of mucus-producing cells which metamorphose to the paired zones 2 and 4 respectively in the endostyle of the adult. In both the larva and the adult these zones are parts of the food-trapping mechanism. An endostyle zone, which has a positi...

journal_title：General and comparative endocrinology

authors： Fredriksson G,Ericson LE,Olsson R

更新日期：1984-11-01 00:00:00

abstract：:Despite its occurrence in most vertebrate species, the function of the hypophysial pars tuberalis (PT) remains obscure. Recent immunocytochemical studies have demonstrated the presence of hormone-containing cells in the few species studied. In the present study the secretory cell composition of the PT was characterize...

journal_title：General and comparative endocrinology

authors： Gross DS

更新日期：1984-11-01 00:00:00

abstract：:Only recently have the cardiac actions of parathyroid hormone and its N-terminal (1-34) fragment (bPTH(1-34] been examined. Parathyroid hormone was found to exert a positive chronotropic effect on the heart tissue of several mammals and one amphibian in vivo and/or in vitro. The purpose of the present study was to exa...

journal_title：General and comparative endocrinology

authors： Furspan PB,Sham JS,Shew RL,Peng G,Pang PK

更新日期：1984-11-01 00:00:00

abstract：:Normal saline, L-thyroxine (L-T4, 0.5 micrograms/bird/day), and testosterone (100 micrograms/bird/day) were administered separately to intact, thyroidectomized, and castrated spotted munia over a 30-day period and the effects on basal metabolic rate (BMR), gonads, and body weight were recorded. Thyroidectomy and castr...

journal_title：General and comparative endocrinology

authors： Gupta BB,Thapliyal JP

更新日期：1984-10-01 00:00:00

abstract：:The binding of 125I-labeled ovine prolactin (oPRL) to membrane preparations of tissue from freshwater-adapted tilapia (Sarotherodon mossambicus) was examined. Liver, ovary, and testis showed a relatively high specific binding (5-10%). A lower specific binding occurred consistently in intestine and gill tissue, and inc...

journal_title：General and comparative endocrinology

authors： Edery M,Young G,Bern HA,Steiny S

更新日期：1984-10-01 00:00:00

abstract：:A radioimmunoassay (RIA) was developed to measure cortisone in Atlantic salmon plasma. Diatomaceous earth microcolumn chromatography was used to separate the cortisone from other steroids. The RIA method following chromatography was validated by analyzing each of six samples of blood by double isotope derivative assay...

journal_title：General and comparative endocrinology

authors： Weisbart M,McGowan LK

更新日期：1984-09-01 00:00:00

abstract：:When pigeons were injected with an extract of chicken hypothalamus, the increase in weight of the crop sac showed that prolactin secretion was stimulated. Crop sac weight was no higher after 16 days of injection than it was after 8 days. Pituitary gland content of prolactin and growth hormone was elevated at 8 days, b...

journal_title：General and comparative endocrinology

authors： Hall TR,Chadwick A

更新日期：1984-08-01 00:00:00

abstract：:The functional abilities of 9.5-, 10.5-, 11.5-, and 12.5-day-old chick embryos to respond to exogenous thyrotrophin-releasing hormone (TRH) were evaluated by means of changes in plasma total thyroxine (T4). T4 concentrations were determined 3.0, 6.0, 12.0, and 24.0 hr after TRH treatment. The data of the present inves...

journal_title：General and comparative endocrinology

authors： Thommes RC,Williams DJ,Woods JE

更新日期：1984-08-01 00:00:00

abstract：:Long-term administration of L-thyroxine (T4) in the wax bill (lal munia) inhibited the current gonad development cycle, and the increase in gonadal volume in the second cycle was suppressed only by higher concentrations. Gonadal inhibition by high but not by low doses of L-T4 was associated with a failure in the devel...

journal_title：General and comparative endocrinology

authors： Thapliyal JP,Gupta BB

更新日期：1984-07-01 00:00:00

abstract：:Testosterone was isolated and quantified from male lobster serum and testes by solvent extraction, sequential thin-layer chromatography, and high-performance liquid chromatography. The identity of the isolated steroid was established by its isopolarity and isomorphicity with authentic radiolabeled testosterone and its...

journal_title：General and comparative endocrinology

authors： Burns BG,Sangalang GB,Freeman HC,McMenemy M

更新日期：1984-06-01 00:00:00

abstract：:Changes in plasma cortisol and glucose concentration were studied in carp during acclimation from fresh water (FW) to 1.5% salt water and vice versa. There was an increase in cortisol and glucose concentration during acclimation from FW to salt water which lasted for several days. Reacclimation to FW did not cause cle...

journal_title：General and comparative endocrinology

authors： Abo Hegab S,Hanke W

更新日期：1984-06-01 00:00:00

abstract：:Farnesylacetone, a molecule isolated from the androgenic glands of Carcinus maenas, inhibits vitellogenesis in the ovaries. Here the effect of farnesylacetone on protein and RNA synthesis in cultured organs is described. Both leucine and uridine incorporation in ovaries were inhibited with low concentration of farnesy...

journal_title：General and comparative endocrinology

authors： Berreur-Bonnenfant J,Lawrence F

更新日期：1984-06-01 00:00:00

abstract：:The binding of the synthetic glucocorticoid dexamethasone (dex) to Rana catesbeiana tadpole liver, intestine, and tailfin cytosol during both spontaneous and triiodothyronine (T3)-induced metamorphosis has been examined. No change was observed in the dissociation constant (KD) in the liver or intestine during either s...

journal_title：General and comparative endocrinology

authors： Woody CJ,Jaffe RC

更新日期：1984-05-01 00:00:00

abstract：:Intact and radiothyroidectomized male starlings were transferred from short (8-hr) to long (16-hr) day lengths and measurements made of testicular development and of plasma prolactin concentrations. In intact birds the testes reached full maturity within 3 weeks and regressed after 6 weeks of photostimulation, indicat...

journal_title：General and comparative endocrinology

authors： Goldsmith AR,Nicholls TJ

更新日期：1984-05-01 00:00:00

abstract：:The secretory response of the nasal salt gland of the north African agamid lizard Uromastix acanthinurus to injections of 1 M KCl and NaCl is correlated with changes in circulating levels of the corticosteroids aldosterone and corticosterone. KCl loading led to a progressive rise in plasma aldosterone levels, and NaCl...

journal_title：General and comparative endocrinology

authors： Bradshaw SD,Lemire M,Vernet R,Grenot CJ

更新日期：1984-05-01 00:00:00

abstract：:The box turtle (Terrapene carolina triunguis) does not appear to have evolved a mechanism for secondary bone formation similar to Aves inasmuch as several parameters of bone calcium metabolism were unaffected by estrogen treatment. This suggests that reproduction does not constitute a substantial stress to the calcium...

journal_title：General and comparative endocrinology

authors： Magliola L

更新日期：1984-04-01 00:00:00

abstract：:Endogenous cyclic-AMP concentrations in Malpighian tubules of locusts increase as a result of diuretic hormone stimulation, and the level of increase is shown to be dependent on basal intracellular levels of cyclic-AMP. Furthermore, the increase in endogenous cyclic-AMP is in such excess as to cause excretion of high ...

journal_title：General and comparative endocrinology

authors： Rafaeli A,Pines M,Stern PS,Applebaum SW

更新日期：1984-04-01 00:00:00

abstract：:In the domestic fowl, plasma concentrations of growth hormone (GH) have been observed to be elevated in young, rapidly growing chicks and low in older chicks and in adults. In this present study the plasma concentration of GH was high in 35-day-old male chickens and declined to the low adult concentration by 91 days o...

journal_title：General and comparative endocrinology

authors： Scanes CG,Johnson AL

更新日期：1984-03-01 00:00:00

abstract：:Determination of serum progesterone concentrations over a period of 2 years in female camels during various reproductive stages (estrus, pregnant, nonpregnant, and lactating) suggests that the progesterone levels exceeding 1 ng/ml are reached only if mating is fertile. A cycling camel does not have a luteal phase and ...

journal_title：General and comparative endocrinology

authors： Elias E,Bedrak E,Yagil R

更新日期：1984-02-01 00:00:00

abstract：:The brains of goldfish and other teleosts contain high-affinity binding sites for [3H][3-methyl-His2]thyrotropin-releasing hormone [( 3H]MeTRH) which closely resemble TRH receptors in mammalian brain and pituitary gland in apparent dissociation constant (KD = 3-4 nM), in pharmacology for eight TRH analogs, and in exhi...

journal_title：General and comparative endocrinology

authors： Burt DR,Ajah MA

更新日期：1984-01-01 00:00:00

abstract：:Plasma aldosterone levels of Bufo japonicus formosus captured in their natural environment were determined each month throughout 1 year by radioimmunoassay. Low values were recorded in winter and spring, and the maximum occurred in July or August. High summer levels of aldosterone and increases in live weight were cor...

journal_title：General and comparative endocrinology

authors： Jolivet-Jaudet G,Inoue M,Takada K,Ishii S

更新日期：1984-01-01 00:00:00