نتایج جستجو برای: رادیوایزوتوپ sm

تعداد نتایج: 18489  

2001
Patricia Hersh

We study the quotient complex ∆(B lm)/S l ≀ Sm as a means of deducing facts about the ring k[x 1 ,. .. , x lm ] S l ≀Sm. It is shown in [He] that ∆(B lm)/S l ≀ Sm is shellable when l = 2, implying Cohen-Macaulayness of k[x 1 ,. .. , x 2m ] S 2 ≀Sm for any field k. We now confirm for all pairs (l, m) with l > 2 and m > 1 that ∆(B lm)/S l ≀ Sm is not Cohen-Macaulay over Z Z/2Z Z, but it is Cohen-...

2013
Cameron Mura Peter S. Randolph Jennifer Patterson Aaron E. Cozen

Hfq and other Sm proteins are central in RNA metabolism, forming an evolutionarily conserved family that plays key roles in RNA processing in organisms ranging from archaea to bacteria to human. Sm-based cellular pathways vary in scope from eukaryotic mRNA splicing to bacterial quorum sensing, with at least one step in each of these pathways being mediated by an RNA-associated molecular assembl...

Journal: :Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences 2015
Shuhe Lü Cong Lin Pingsheng Xu

OBJECTIVE Three fractions (SM, SM-A, SM-B) were prepared from different polarity parts of Ipomoea batatas Lam. (cv.simon) leaves and the anti-tumor potency as well as the dose-response relations were evaluated. METHODS The anti-tumor activities of fraction SM, SM-A or SM-B were screened by MTS in human hepatic cancer Hep3B cells, lung cancer A549 cells or gastric carcinoma MGC803 cells, respe...

Journal: :The Journal of antibiotics 1976
M Kono K O'Hara

Three clinical isolates, K-Ps 94, K-Ps 97 and K-Ps 102, of Pseudomonas aeruginosa having R factor and showing MIC of more than 51,200 mcg/ml to streptomycin (SM), were examined for mechanisms of SM-resistance. Among the strains, K-Ps 94 and K-Ps 102 had R factor conferring SM-resistance. In K-Ps 94, the mechanism of SM-resistance was mainly owing to SM-phosphorylating enzyme and also owing to d...

Journal: :British journal of haematology 2007
Tania Zuluaga Toro Fred H Hsieh Juraj Bodo Henry Y Dong Eric D Hsi

Systemic mastocytosis (SM) is characterized by the abnormal proliferation and accumulation of mast cells (MCs). Constitutive activation of kit, a receptor tyrosine kinase (TK), has been associated with all types of SM. Signal transducers and activators of transcription (STATs), such as STAT5, mediate downstream kit signalling. We hypothesized that nuclear phospho-STAT5 (pSTAT5) in MCs might ref...

2011
Xueying Chen Aijun Sun Yunzeng Zou Junbo Ge Jason M Lazar Xian-Cheng Jiang

Sphingomyelin (SM) is an abundant phospholipid in cell membranes and in lipoproteins. In human plasma, SM is mainly found in atherogenic lipoproteins; therefore, higher levels of SM may promote atherogenesis. We investigated the relations between plasma SM levels and the presence of angiographic coronary heart disease (CHD) and left ventricular systolic dysfunction. We studied 732 patients refe...

ژورنال: :مجله دانشگاه علوم پزشکی بابل 0
کریم قاضی خانلوثانی، k ghazi khanlou sani, همدان، دانشگاه علوم پزشکی، گروه رادیولوژی، تلفن: 8282801-0811 مهدی مومن نژاد، m momennezhad, سیدرسول ذکوی، sr zakavi, سیامک سبزواری s sabzevari

سابقه و هدف: پرتوگیری پرسنل در بخشهای پزشکی هسته ای در حین وضعیت دهی به بیمار و همچنین آماده سازی دارو امری اجتناب ناپذیر است. استفاده از روپوشهای سربی(apron) نیز به دلیل ایجاد پرتوهای x اختصاصی سرب، در اثر برخورد پرتوهای گامای پرانرژی و ضریب جذب بالای این پرتوها در بدن مورد مناقشه است. این مطالعه تاثیر روپوشهای سربی معادل 5/0 میلیمتر سرب را در میزان پرتوگیری پرسنل در دو وضعیت شبیه سازی شده برا...

Journal: :The Journal of antibiotics 2003
Mohamed Abdelfattah Rajendra P Maskey Ratnakar N Asolkar Iris Grün-Wollny Hartmut Laatsch

A new antibiotic, named seitomycin (1c), and the known microbial metabolite tetrangulol methyl ether (2) were found in the ethyl acetate extract of two terrestrial Streptomyces sp. isolates. The structure of the new antibiotic was elucidated by spectroscopic studies and by comparison of the NMR data with the structurally related hatomarubigin C (1a) and SM-196 B (1b). Seitomycin (1c) showed mod...

Journal: :The Journal of biological chemistry 2001
E A Lipscomb P D Sarmiere R S Freeman

Sympathetic neurons undergo protein synthesis-dependent apoptosis when deprived of nerve growth factor (NGF). Expression of SM-20 is up-regulated in NGF-deprived sympathetic neurons, and ectopic SM-20 is sufficient to promote neuronal death in the presence of NGF. We now report that SM-20 is a mitochondrial protein that promotes cell death through a caspase-dependent mechanism. SM-20 immunofluo...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید