This review covers H–H bond cleavage of dihydrogen (H2) mediated by structurally well-defined rare-earth metal (scandium, yttrium and lanthanides) complexes, their applications in homogenous catalysis, such as catalytic hydrogenation unsaturated organic molecules. Depending on the mechanism cleavage, this is organized two parts: (1) ?-bond metathesis, (2) non-?-metathesis H2 activation. The lat...

A simple, efficient and clean procedure has been developed for the cleavage of imines C=N bond. Deprotection of imines to their parent carbonyl and amine compounds was achieved using p-toluenesulfonic acid in the solid state condition at 25-45 ˚C. The salient features of this methodology are shorter reaction times, cheap processing, high yields of product and easy availability of the catalyst. ...

Hydrogen-induced ductility loss in two precipitation-hardened, martensitic stainless steels was investigated via tensile testing with internal hydrogen, revealing it to be more significant a higher hydrogen content or strength. A lower and strength resulted quasi-cleavage fracture considerable plastic strain, suggesting that hydrogen–dislocation interaction contributed the ductility. When eithe...

Cleavage fracture and the mechanisms involved in different ferritic steel model microstructures are investigated according to grain sizes, precipitates solute atoms matrix. For each case, one of these parameters is varied. Estimation critical stress for cleavage was discussed: it shown be determined from a simple Griffith inspired analysis or by employing Smith's description. The description ad...

Background: The parthenogenetic of oocytes is important in cloning research, as artificial activation of oocytes is an essential component of nucleus transfer protocols. Hydrostatic pressure can act as a mechanical stimulator that rearranges egg contents. Ethanol promotes a single intracellular Ca2+ increase of greater and longer amplitude than the initial increase observed at fertilization. In...

normal 0 false false false en-us x-none ar-sa background: cigarette smoke contains many oxidants and may alter the human reproduction by inducing oxidative stress (os) in both active and passive smokers. this study was designed to evaluate the effect of environmental tobacco smoke (ets) exposure on oxidative stress in the follicular follicle and the assisted reproduction outcomes. materials and...

We demonstrated the photo-controlled sequence-selective dsDNA cleavage using a DNA origami structure with Cas9 nuclease.

Debonding-on-demand adhesives were designed by fabricating photochemical reversible bonds and using dynamic polymer cleavage flow generation mechanisms.

Background: The success of in vitro-fertilization (IVF) cycles is determined large part by the quality embryo cleavage, which turn, dependent on culture media (CM). Many factors can influence CM, one levels Cell Free Deoxyribonucleic acid (DNA). Understanding association between Cell-free DNA CM and cleavage could help improve IVF techniques.
 Methods: This prospective study was conducted ...