The zonae pellucidae of mouse oocytes were photo-ablated by an ultraviolet laser (337.1 nm) to create one or two 10 microm holes. The pulse energy used was approximately 3 microJ/s, with a frequency of 10 pulse/s. These laser zona-drilled (LZD) oocytes with one hole (LZD1) or two holes (LZD2) and the zona-intact controls were inseminated with spermatozoa at standard concentrations of 5x10(4), 5...

The effect of acetylsalicylic acid (ASA) injected in ovo on the 18 d of incubation on the hatchability, course of hatching, and thyroid hormone concentrations (thyroxine (T4) and triiodothyronine (T3)) in the blood of chicks exposed to control (CON) or hyperthermic (HT) conditions during hatching were investigated. Eggs (n=540) from a broiler breeder flock were incubated under standard conditio...

SEPTEMBER 2010 CATARACT & REFRACTIVE SURGERY TODAY EUROPE 85 Editor’s note: In last month’s Fundamentals column, Kathryn Masselam Hatch, MD; and Jonathan H. Talamo, MD, provided a comprehensive overview of excimer laser technology. Drs. Hatch and Talamo discussed basic concepts such as fluence, beam profile, ablation pattern, and eye tracking and registration to help readers optimize excimer la...

MCKINDSEY, C.W., and MCLAUGHLIN, J.D. 1994. Transmission of Cyclocoelum mutabile (Digenea) to snails: the influence of temperature on the egg and miracidium. Can. J. Zool. 72: 1745 175 1. This study examined the survival and hatching dynamics of eggs of the digenean Cyclocoelum mutabile and the survivorship and infectivity of the miracidia under different temperature regimes. Hatching did not o...

Abstract The study was carried out to investigate the manufacturing possibility of Silicon Carbide (SiC) by direct Powder Bed Selective Laser Processing (PBSLP) experimentally and numerically. experimental means PBSLP while numerical accomplished developing a CFD model. model simulates accurately realistic conditions process. A user-defined code, that describes process parameters such as laser ...

Prostaglandins participate in a variety of female reproductive processes, including ovulation, fertilization, embryo implantation and parturition. In particular, maternal prostacyclin (PGI(2)) is critical for embryo implantation and the action of PGI(2) is not mediated via its G-protein-coupled membrane receptor, IP, but its nuclear receptor, peroxisome-proliferator-activated receptor δ (PPARδ)...

I examined the role of vibrations in predator-induced early hatching of red-eyed treefrogs, Agalychnis callidryas. The arboreal eggs of A. callidryas hatch up to 30% early if attacked by egg-eating snakes. This induced hatching is a behavioural response that occurs once snakes begin physically disturbing the clutch, and is sufficiently rapid to allow most embryos to escape. Other intense but be...