نتایج جستجو برای: 2s
تعداد نتایج: 6212 فیلتر نتایج به سال:
The human protein Cox17 contains three pairs of cysteines. In the mitochondrial intermembrane space (IMS) it exists in a partially oxidized form with two S-S bonds and two reduced cysteines (HCox17(2S-S)). HCox17(2S-S) is involved in copper transfer to the human cochaperones Sco1 and Cox11, which are implicated in the assembly of cytochrome c oxidase. We show here that Cu(I)HCox17(2S-S), i.e., ...
Dielectronic recombination (DR) of beryllium-like Xe was investigated by using the ESR electron cooler as a free electron target. Three series of resonances associated with excitations from the 2s ground state could be measured (Fig. 1), namely 2s → 2s2p P1, 2s → 2s2p P1 and 2s → 2s2p P2. The resonances of the 2s2p P2 nj manifolds are much weaker than the ones of the other series. No signatures...
Bupropion is an atypical antidepressant that also has usefulness as a smoking-cessation aid. Because hydroxybupropion, a major metabolite of bupropion, is believed to contribute to its antidepressant activity, this metabolite may also contribute to the smoking-cessation properties of bupropion. This study investigated the effects of hydrobupropion enantiomers on monoamine transporters and nicot...
(3S)-Acetoin and (2S,3S)-2,3-butanediol are important platform chemicals widely applied in the asymmetric synthesis of valuable chiral chemicals. However, their production by fermentative methods is difficult to perform. This study aimed to develop a whole-cell biocatalysis strategy for the production of (3S)-acetoin and (2S,3S)-2,3-butanediol from meso-2,3-butanediol. First, E. coli co-express...
Hard spin-independent three-loop radiative contributions to energy levels in positronium generated by the two-photon-exchange diagrams with one-loop insertions fermion lines and exchanged photons are calculated. This is a next step calculations of all corrections order mα7 inspired new generation precise 1S−2S 2S−2P measurements positronium.
اثر کمبود روی بر رشد، مقدار رنگیزهها و فتوسنتز گیاه کلم قرمز (Brassica oleracea L. var. capitata f. rubra) در سه شرایط نوری متفاوت، شامل 100، 200 و 400 µmolm-2s-1 در محیط هیدروپونیک با غلظت کافی (725 پیکومول روی آزاد) و پایین (30 پیکومول روی آزاد) مطالعه شد. تولید ماده خشک اندام هوایی و ریشه در شرایط کمبود روی به ترتیب تا 95 % و 63 % کاهش، ولی تحت تأثیر افزایش شدت روشنایی افزایش یافت. کمبود رو...
An efficient and highly stereoselective synthesis of D-ribo-(2S,3S,4R)-phytosphingosine was accomplished in 62% overall yield starting from commercially available (2S)-hydroxymethylaziridine via osmium-catalyzed asymmetric dihydroxylation as a key step.
A sample of 3.79 million ψ(2S) events is used to study the decays of charmonium to axialvector plus pseudoscalar mesons. The branching fraction for the decay ψ(2S) → b±1 (1235)π agrees with expectations based on scaling the corresponding J/ψ branching fraction. Flavor-SU(3)-violating K1(1270)K1(1400) asymmetries with opposite character for ψ(2S) and J/ψ decays are observed. This contrasting beh...
Iron-sulfur cluster biogenesis is executed by distinct protein assembly systems. Mammals have two systems, the mitochondrial Fe-S cluster assembly system (ISC) and the cytosolic assembly system (CIA), that are connected by an unknown mechanism. The human members of the NEET family of 2Fe-2S proteins, nutrient-deprivation autophagy factor-1 (NAF-1) and mitoNEET (mNT), are located at the interfac...
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