Extracts of post-diapause, pre-hatch eggs of the gypsy moth, Lymantria dispar L. were examined for prothoracicotropic hormone (PTTH)-like activity using an in vitro assay involving last-instar prothoracic glands (PGs). The eggs were extracted in water, eluted from a low-pressure C18-silica cartridge in 60% acetonitrile, and fractionated on a high-performance, size-exclusion column. The primary ...

1 All teleost fish produce ammonia as a metabolic waste product. In embryos, ammonia 2 excretion is limited by the chorion and fish must detoxify ammonia by synthesizing urea via the 3 ornithine urea cycle (OUC). Although urea is produced by embryos and larvae, urea excretion 4 (Jurea) is typically low until yolk sac absorption, increasing thereafter. The aim of this study was 5 to determine th...

As the current poultry production system stands, there is a period of time when newly hatched chicks are prevented from access to feed for approximately 48-72 h. Research has indicated that this delay in feeding may result in decreased growth performance when compared to chicks that are fed immediately post-hatch. To remedy this issue, in ovo methodology may be applied in order to supply the em...

Muscle development and growth were investigated in haddock larvae (Melanogrammus aeglefinus L.) incubated under controlled temperatures (4, 6, 8 degrees C) and reared post-hatch through yolk-dependent and exogenous-feeding stages in a 6 degrees C post-hatch environment. Changes in cell number and size in superficial and deep myotomes within the epaxial muscle were investigated for 28 days follo...

This study evaluated the effects of a Bacillus direct-fed microbial and microencapsulated calcium butyrate fed individually in combination, as compared to an antibiotic growth promoter, on performance, processing characteristics, intestinal morphology, microbiota Ross 708 broilers reared from 0 47 d post-hatch. Dietary treatments included: (1) negative control with no antimicrobial (NC), (2) po...

OBJECTIVE We determined the effectiveness of the HATCH score in patients with typical atrial flutter (AFl) undergoing cavotricuspid isthmus (CTI) ablation to predict long-term atrial fibrillation (AF). METHODS We conducted an observational retrospective single-center cohort study including all patients admitted to our hospital for a CTI ablation between 1998 and 2010. The patients were divide...

Ingestion of carbohydrates from the small intestine is the major route of energy supply in animals. In mammals these functions develop both pre- and postnatally and are coordinated for the sucking period. In birds, the physiological requirements are different and hatchlings ingest diets rich in complex carbohydrates soon after hatching. The present study examined the ontogeny of intestinal carb...

Histological development of digestive tract of the Caspian salmon, Salmo trutta caspius, from hatching to 6 month post-hatching was studied using light microscope. The digestive tract of newly hatched larvae was a simple, undifferentiated tube which continued from mouth to anus. In 10 days post hatching larvae, the alimentary canal became more differentiated and secretion was started activity, ...