نتایج جستجو برای: mechanical twinning
تعداد نتایج: 238840 فیلتر نتایج به سال:
Embryo development in plants initiates following the transverse division of a zygote into an apical, proembryo cell and a basal cell that gives rise to the suspensor. Although mutants affected in embryo development through changes in cell division have been described, little is known about the control of the first zygotic division that gives rise to the proembryo. Ascorbic acid (Asc) promotes c...
Recent studies report a high incidence of monozygotic twinning in Beckwith-Wiedemann syndrome. A phenotypical discordance in monozygotic twins is rare. Twinning and Beckwith-Wiedemann syndrome show higher incidence in children born after assisted reproductive techniques. We report on the first observation of esophageal atresia and Beckwith-Wiedemann syndrome in one of the naturally conceived di...
Twinning-induced plasticity (TWIP) steel offers high strength and ductility. However, in this study, deformation-induced detwinning was studied to prove that not all twins significantly benefit the mechanical properties. The quasi situ observation results indicated submicron-sized were unstable during Charpy impact loading. In contrast TWIP concept, analysis of geometrically necessary dislocati...
Abstract The dynamic mechanical properties of AZ31 magnesium alloys were analyzed under different strain rates by using a separated Hopkinson pressure bar system. microstructure the specimens was observed optical microscopy. results show that yield strength alloy is insensitive to rate. compressive increasing and shear deformation localization behavior more obvious with increase in Meanwhile, t...
In this work, we develop a method named Twinning, for partitioning dataset into statistically similar twin sets. Twinning is based on SPlit, recently proposed model-independent optimally splitting training and testing orders of magnitude faster than the SPlit algorithm, which makes it applicable to Big Data problems such as data compression. can also be used generating multiple splits given aid...
Spontaneous dizygotic (DZ) twinning occurs in 1%-4% of women, with familial clustering and unknown physiological pathways and genetic origin. DZ twinning might index increased fertility and has distinct health implications for mother and child. We performed a GWAS in 1,980 mothers of spontaneous DZ twins and 12,953 control subjects. Findings were replicated in a large Icelandic cohort and teste...
Estimates of variances due to additive and dominance genetic effects and permanent and temporary environmental effects were obtained for ovulation and twinning rates from a composite population selected for twinning rate. Measures of ovulation rate after 11 mo of age on 2,317 heifers with a total of 19,209 measures were used. Twinning measures were on 1,522 first-parity cows, 1,311 later-parity...
BACKGROUND The incidence rates of anterior neural tube defects, anencephaly and encephalocele appear increased among twins compared with singletons. The current study aimed to evaluate whether the etiology of this phenomenon is related to twinning, assisted reproductive technology (ART), or both. METHODS The study cohort consisted of parturient women who were referred to our ultrasonography u...
The effects of metastability engineering on tuning deformation behavior and mechanisms in TiZrHfTaX (x = 1.00, 0.80, 0.60, 0.50) refractory body-centered cubic (BCC) high entropy alloys were investigated, with specific emphasis elucidating the underlying interplay between phase stability, mechanical property, twins. It was found that proper thermomechanical treated samples, a variation tantalum...
This study was carried out investigate the effect of slow-release blous on reproductive efficiency, twinning and weaning weight. 306 female Cashmere Raeini goats were selected randomly and divided into eight treatments. Treatments were: 1and 2) control with and without injection eCG, 3 and 4) Consumption one slow-release blolus with and without injection eCG, 5 and 6) Consumption two slow-rele...
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