Embryo mortality

Part 1 book "Veterinary embryology" includes content: Historical aspects of embryology; division, growth and differentiation of cells; gametogenesis; fertilisation; cleavage; gastrulation; cell signalling and gene functioning during development; stem cells; establishment of the basic body plan; coelomic cavities; foetal membranes; forms of implantation and placentation; embryo mortality in domestic species; cardiovascular system; embryological and postnatal features of haematopoiesis; nervous system; muscular and skeletal systems.

227p oursky05 20-09-2023 8 2   Download

Inversion polymorphisms constitute an evolutionary puzzle: they should increase embryo mortality in heterokaryotypic individuals but still they are widespread in some taxa. Some insect species have evolved mechanisms to reduce the cost of embryo mortality but humans have not. In birds, a detailed analysis is missing although intraspecific inversion polymorphisms are regarded as common.

22p viaristotle 29-01-2022 7 0   Download

Tbx5 deficiency in zebrafish causes several abnormal phenotypes of the heart and pectoral fins. It has been reported that exogenous human growth hormone can enhance expression of downstream mediators in the growth hormone and insulin-like growth factor I (IGF-I) pathway and partially restore dysmorphogenesis in tbx5 morphants.

15p viwyoming2711 16-12-2020 13 1   Download

Animals with polyploid, hybrid nuclei offer a challenge for models of gene expression and regulation during embryogenesis. To understand how such organisms proceed through development, we examined the timing and prevalence of mortality among embryos of unisexual salamanders in the genus Ambystoma.

15p viwyoming2711 16-12-2020 17 1   Download

The one-day-old O. latipes embryos is harvested and exposed to different concentrations of o, p`-DDT 0.04; 0.08; 0.12; 0.16; 0.2; 0.24; 0.28 and 0 µg/l (the control sample is not supplemented with o, p`-DDT) for 24, 48, 72 and 96 hours. After 24, 48, 72 and 96 hours, the results showed that LC50 value is gradually decreased, respectively 0.1013; 0.0772; 0.0486 and 0.0359 µg/l. The difference between LC50 values depends on the exposure concentration and exposure time. The results showed that the mortality rates of Medaka O.

9p caygaocaolon6 22-07-2020 23 2   Download

Congenital heart defects occur in approximately 1% of newborns and are a major cause of morbidity and mortality in infants and children. Many adult cardiac diseases also have developmental basis, such as heart valve malformations, among others. Therefore, dissecting the developmental and molecular mechanisms underlying such defects in embryos is of great importance in prevention and developing therapeutics for heart diseases that manifest in infants or later in adults.

356p thienbinh1311 13-12-2012 51 4   Download

Current practice guidelines for ventilatory management advocate protective lung strategies to prevent volutrauma, barotrauma, atelectrauma and biotrauma (3-5). The principles are to use low tidal volumes (Vt) (5-6 ml/kg ideal body weight), maintenance of low mean airway pressures ≤ 30 cmH2O, judicious use of positive end-expiratory pressure (PEEP) with Δ pressure ≤ 18 cmH2O, higher respiratory rates and permissive hypercapnia.

340p wqwqwqwqwq 21-07-2012 69 8   Download