Heterologous murre! gonadotropic hormone (m-GtH) binds to common carp oocyte plasma membrane and enhances steroid secretion. With increasing concentration of radio-labelled hormone the receptor binding is also found to increase linearly up to a certain concentration and then decrease. The [1 !] murre! GtH binding characteristics to a preparation of common carp ovarian plasma membrane shows satu...

Analytical procedure for determination of glyceroltriheptanoate (GTH) in processed animal by-products was developed. Samples of meat and bone meal were sieved through 1 mm sieve, extracted with petroleum ether, and cleaned up on amino bonded solid phase extraction cartridges. Extracts were analysed with a gas chromatograph combined with flame ionisation detector, on DB5 capillary column (30 m, ...

Pisciculture, to increase the fish production, has a crucial limitation. Fish cultured in land-locked water bodies usually do not breed without the hormonal induction. Technology of fish breeding suffered for a long time due to the lack of suitable commercial product to induce the spawning of economically important fish. Hypophysation technique, where pituitary extract was used to induce the br...

The pars distalis of the tortoise, Geoclemis reevesii, was studied immunocytochemically with regards to its fine structure and distribution of different cell types. The pars distalis consists of cephalic and caudal lobes and a zona tuberalis, each with distinct cellular components. The cephalic lobe contains ACTH cells and prolactin (PRL) cells, while the caudal lobe consists of STH (GH) cells,...

Expressed sequence tag (EST) analysis was adopted to address physiological changes after injection of carp pituitary extract for induction of ovulation. ESTs were analyzed from cDNA libraries constructed from mRNA isolated from channel catfish (Ictalurus punctatus) pituitaries before and after induction of ovulation by injection of carp pituitary extract. One hundred randomly picked clones were...

In this paper, we suggest a deterministic mechanism for the generation and development of sidebranches in dendritic growth. We investigated the existence of such a mechanism for Gibbs-Thomson-Herring (GTH [1]) anisotropic capillary boundary condition recently in our previous work [2] . Here, we focus our study on the GTH anisotropic kinetic boundary condition. We develop and apply accurate boun...

In this paper we report the first complete mapping of the pituitary in a tuna species. The various different adenohypophysis cell types of the bluefin tuna, Thunnus thynnus L. have been identified and located using different antisera against mammalian and piscine hormones and various histochemical techniques: PAS, Alcian Blue pH 2.5 and lectins -ConA and WGA(Neutral and Acidic Glycoproteins); B...

Insulin-like growth factor-I (IGF-I) has been shown to be involved in pubertal activation of gonadotropin (GTH) secretion. The aim of this study was to determine if IGF-I directly stimulates synthesis and release of GTH at an early stage of gametogenesis. The effects of IGF-I on expression of genes encoding glycoprotein alpha (GPalpha), follicle-stimulating hormone (FSH) beta, and luteinizing h...