نتایج جستجو برای: free β
تعداد نتایج: 684769 فیلتر نتایج به سال:
A precipitation study was carried out during the isothermal aging at 850 °C for Fe-10at.%Ni-15at.%Al, Fe-10at.%Ni-15at.%Al-2.5at.%Cu and Fe-10at.%Ni-15at.%Al-5at.%Cu alloys. The experimental, Calphad, Kinetic/Precipitation calculated results indicated that Cu-addition to ternary alloy promoted a higher volume fraction of β´precipitates, which caused better response Cu-containing coarsening resi...
β- آمینو الکلها کاربرد وسیعی در زمینه های صنعتی، بیولوژیکی و دارویی دارند. واکنش افزایش هسته دوستی آمین ها به اپوکسید ها یکی از روشهای موثر برای سنتز این دسته از ترکیبات می باشد که معمولاً به وسیلهء اسیدهای لوئیس از قبیل zncl2، ساماریوم یدید ، آلومینا ، sn(otf)2 و ... انجام می شوند. از آنجاییکه این روشها دارای معایبی از قبیل زمان واکنش طولانی، شرایط سخت واکنش، راندمان پایین، استفاده از حلال سمی ...
The purpose of this study was to examine the effect of β-hydroxy-β-methylbutyrate-free acid (HMB-FA) and cold-water immersion (CWI) on circulating concentrations of TNF-α and monocyte TNF-α receptor 1 (TNFR1) expression. Forty resistance-trained men (22.3 ± 2.4 yr) were randomized into four groups [placebo (PL), HMB-FA, CWI, and HMB-FA-CWI] and performed an acute, intense exercise protocol (fou...
The adduct [MeO → Bpin-Bpin](-) efficiently mediates the β-boration of α,β-unsaturated imines formed in situ. The use of chiral phosphines as additives, and in particular the chiral phosphine (S)-MeBoPhoz, enables the catalytic asymmetric reaction to proceed with higher enantioselectivity than the analogue copper(I) mediated reaction.
Background: Current prenatal diagnosis requires invasive testing which carries a 1-4% procedure-related-risk of miscarriage; hence, non-invasive techniques are desired. The recent demonstration of cell-free-fetal-DNA enriched from maternal plasma has opened new possibilities for non-invasive-prenatal-diagnosis of not only genetic-disorders such as β-thalassaemia and haemophilia but also chromos...
Background b-hydroxy-b-methylbutyrate (HMB), a metabolite of the amino acid leucine, has been shown to promote strength and lean muscle mass when supplemented in conjunction with resistance training. Recently, a new free-acid form of HMB has been shown to reach higher plasma concentrations in a shorter amount of time compared to the calcium-salt form. This higher bioavailability may rationalize...
During the lignification of grass cell walls, ferulate acts like a nucleation site that can cross couple with monolignols, i.e. coniferyl alcohol and sinapyl alcohol, to form dimeric products. Here we investigated in detail ferulate-sinapyl cross-coupling products an effort on better understanding nature scope lignin-ferulate interactions. In biomimetic oxidative system, (SA) reacted ethyl (FA)...
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