abstract：:Testosterone- and progesterone-like substances were detected by radioimmunoassay (RIA) in chromatographed extracts of hemolymph from larvae of Sarcophaga bullata (S.B.). Gas chromatographic (GC) analysis after heptafluorobutyric acid (HFBA) derivation of hemolymph extracts, purified by paper and silica gel column chro...

journal_title：General and comparative endocrinology

authors： De Clerck D,Eechaute W,Leusen I,Diederik H,De Loof A

更新日期：1983-12-01 00:00:00

abstract：:The effect of aldosterone and corticosterone on T3 binding to the nuclear fraction of the tail fin of bullfrog tadpoles was investigated in vitro. Both corticoids (10(-7) - 10(-5) M) added to the incubation medium increased T3 binding in a dose-dependent manner. The aldosterone-induced increase in T3-binding was block...

journal_title：General and comparative endocrinology

authors： Suzuki MR,Kikuyama S

更新日期：1983-11-01 00:00:00

abstract：:Using DNA-cellulose affinity chromatography, an estrogen-binding component having the properties of a classical estrogen receptor was characterized from testicular cytosol of the freshwater turtle, Chrysemys picta. This putative cytoplasmic receptor exhibited high affinity (Kd = 7.0 X 10(-10) M), low capacity (1-4 fmo...

journal_title：General and comparative endocrinology

authors： Mak P,Ho SM,Callard IP

更新日期：1983-11-01 00:00:00

abstract：:Subcutaneous daily injections of ovine prolactin (PRL) inhibit photoperiodic induction of gonads and fattening in the female redheaded bunting (Emberiza bruniceps). However, birds respond to the same photoperiod (15L:9D) after withdrawal of the exogenous PRL. Further, PRL injections given in late hours during the subj...

journal_title：General and comparative endocrinology

authors： Tewary PD,Tripathi BK,Kumar V

更新日期：1983-11-01 00:00:00

abstract：:Isospecific injections of intercerebral commissure (COM) extracts of L. stagnalis, L. palustris, and L. ovata (Lymnaeidae) and of extracts of COM/mediodorsal bodies complexes (COM/DB) of Bulinus truncatus (Bulinidae) and Biomphalaria glabrata (Planorbidae) induced oviposition in a high percentage of the experimental s...

journal_title：General and comparative endocrinology

authors： Dogterom GE,van Loenhout H

更新日期：1983-10-01 00:00:00

abstract：:In gravid female goldfish held at 10-12 degrees, a single injection of des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide (LHRH-A), or 2 injections of LHRH-A given 12 hr apart, increased serum gonadotropin (GtH) concentrations, but did not stimulate germinal vesicle migration or ovulation. Injection of...

journal_title：General and comparative endocrinology

authors： Chang JP,Peter RE

更新日期：1983-10-01 00:00:00

abstract：:Serum prolactin (PRL) and luteinizing hormone (LH) levels from mature female turkeys were determined following ovariectomy and daily subcutaneous injections for 4 or 9 days of 0.002-2.0 mg/kg estradiol benzoate (EB), 0.05-2.0 mg/kg progesterone (P), or their combinations. Serum PRL levels were increased (P less than 0...

journal_title：General and comparative endocrinology

authors： El Halawani ME,Silsby JL,Fehrer SC,Behnke EJ

更新日期：1983-10-01 00:00:00

abstract：:Acid extracts of neurointermediate lobe (NIL) and pars distalis (PD) of the pituitary gland of the rainbow trout were radioimmunoassayed for alpha-melanocyte-stimulating hormone (alpha-MSH), beta-melanocyte-stimulating hormone (beta-MSH), adrenocorticotrophin (ACTH), and endorphin. The majority of the alpha-MSH, beta-...

journal_title：General and comparative endocrinology

authors： Rodrigues K,Sumpter JP

更新日期：1983-09-01 00:00:00

abstract：:The dynamics of androgen production by perfused Xenopus testis explants has been investigated under various gonadotropic stimulations. Androgens were measured in perfusate by radioimmunoassay. The behavior of hormones in the perfusion system was assessed. Pieces of testis were capable of producing androgens after more...

journal_title：General and comparative endocrinology

authors： Boujard D,Joly J

更新日期：1983-09-01 00:00:00

abstract：:Asp1,Val5-angiotensin II (AII) caused dose-dependent increases in aortic blood pressure (BP) when injected into anesthetized Pekin ducks. Norepinephrine (NE) and epinephrine (E) concentrations in arterial plasma were found to be elevated 1 min after injection of AII, when BP was peaking, while plasma levels of unconju...

journal_title：General and comparative endocrinology

authors： Wilson JX,Butler DG

更新日期：1983-09-01 00:00:00

abstract：:Free-living starlings (Sturnus vulgaris) were caught by mist netting. Blood samples were taken from them between 20 sec and 4 min after capture and assayed for corticosterone. Before 1 min corticosterone levels were constant (10.3 nmol litre-1) but after 1 min they increased rapidly (27.0 +/- 3.6 nmol litre-1 min-1). ...

journal_title：General and comparative endocrinology

authors： Dawson A,Howe PD

更新日期：1983-08-01 00:00:00

abstract：:Sublethal doses of potassium thiocyanate (KSCN), an iodide competitor, depressed thyroidal radioiodide uptake of fed laboratory rainbow trout at 11 degrees, but did not depress either plasma levels of T4 (L-thyroxine) and T3 (triiodo-L-thyronine) or radioiodide incorporation into plasma iodothyronines. Furthermore, pl...

journal_title：General and comparative endocrinology

authors： Eales JG,Shostak S

更新日期：1983-07-01 00:00:00

abstract：:The neurosecretory caudo-dorsal cells (CDC) of the basommatopora Lymnaea stagnalis produce an ovulation hormone (CDCH), which is released at the periphery of the intercerebral commissure (COM). A rapid in vivo bioassay for CDCH has been established and is based on the dose-dependent relationship between the quantity o...

journal_title：General and comparative endocrinology

authors： Dogterom GE,Bohlken S,Geraerts WP

更新日期：1983-06-01 00:00:00

abstract：:Twelve male edible dormice, captured in the autumn of 1979, were studied for 2 years under natural lighting in an animal enclosure with permanently open windows, at Montpellier, in Southern France (latitude 43 degrees 50' N). Ambient temperature fluctuated annually between +4 and 27 degrees, and the photoperiod betwee...

journal_title：General and comparative endocrinology

authors： Jallageas M,Assenmacher I

更新日期：1983-06-01 00:00:00

abstract：:Circannual and circadian variations in plasma levels of steroids were estimated by radioimmunoassay in the female and male catfish, Heteropneustes fossilis, over two consecutive annual reproductive cycles. In the female catfish, testosterone (T), estradiol-17 beta (E2), and estrone (E1) were detectable in the plasma o...

journal_title：General and comparative endocrinology

authors： Lamba VJ,Goswami SV,Sundararaj BI

更新日期：1983-05-01 00:00:00

abstract：:Saline extracts of the corpus cardiacum (CC) of Locusta migratoria activate glycogen phosphorylase in locust fat body. The response of phosphorylase to CC extracts and to synthetic adipokinetic hormone (AKH) suggests that the factor responsible for the activating effect of the CC on phosphorylase is AKH, supplemented ...

journal_title：General and comparative endocrinology

authors： Van Marrewijk WJ,Van den Broek AT,Beenakkers AM

更新日期：1983-05-01 00:00:00

abstract：:In Sphaeroma serratum, the differentiation of the male external sexual characteristics, as a result of an androgenic gland implant, proceeds more easily in females in vitellogenesis than in immature females. On the contrary, the transformation of the gonads is quicker and more obvious in immature females than in matur...

journal_title：General and comparative endocrinology

authors： Raimond R,Juchault P

更新日期：1983-04-01 00:00:00

abstract：:Ultrastructural comparison of different types of perisympathetic organs (POs) in three species of Coleoptera (Chrysocarabus auronitens, Oryctes rhinoceros, and Tenebrio molitor) showed that the structure of these organs was not related to their morphological types but to their topography. Two kinds of PO structure may...

journal_title：General and comparative endocrinology

authors： Provansal-Baudez A,Baudry-Partiaoglou N

更新日期：1983-03-01 00:00:00

abstract：:Homogenates of maturing rainbow trout testes show specific binding sites for 125J-labeled hCG (= 125I-labeled hCG). The binding is competitively inhibited by unlabeled hCG and by a hypophyseal extract of rainbow trout. It could be demonstrated that the tissue 125J-hCG binding specificity is restricted to the gonadal p...

journal_title：General and comparative endocrinology

authors： Schlaghecke R

更新日期：1983-02-01 00:00:00

abstract：:A mammalian isolated adrenal cell system was validated as a bioassay for goldfish ACTH; the log dose-response curve for the goldfish hormone is parallel to that for synthetic mammalian ACTH1-24, and the two ACTHs induce the same maximum rate of corticosterone production. Using this assay, it was observed that (1) ther...

journal_title：General and comparative endocrinology

authors： Portanova R,Eastman JT

更新日期：1983-01-01 00:00:00

abstract：:The neurohypophysial hormones of the eastern gray kangaroo (Macropus giganteus) have been isolated through molecular sieving and paper chromatoelectrophoresis. One oxytocin-like and two vasopressin-like peptides have been found. These peptides have been characterized by amino acid analysis. Mesotocin ([Ile8]-oxytocin)...

journal_title：General and comparative endocrinology

authors： Chauvet MT,Hurpet D,Chauvet J,Acher R

更新日期：1983-01-01 00:00:00