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تعداد نتایج: 17200665 فیلتر نتایج به سال:
5-Chloropyrazinamide and 5-chloropyrazinoic acid were evaluated for in vitro activity against Mycobacterium tuberculosis, Mycobacterium bovis, and several nontuberculous mycobacteria by a broth dilution method. 5-Chloropyrazinamide was more active than pyrazinamide against all organisms tested. It is likely that this agent has a different mechanism of action than pyrazinamide.
We describe a new cation-exchange fluorometry procedure for separation and measurement of three 5-hydroxyindole metabolites of tryptophan in blood. The metabolites are detected and measured via the fluorescence emitted in the visible region when the separated metabolite is added to a hydrochloric acid-ascorbic acid mixture. The assay requires only 30 mm and is both selective and sensitive. The ...
In vitro human memory CD8 T cell expansion in response to cytomegalovirus requires CD4+ T cell help.
Requirements for human memory CD8(+) T cell expansion are incompletely understood. We found that human cytomegalovirus (HCMV) induced expansion of memory CD8(+) T cells in vitro without requiring intracellular viral peptide synthesis. Peptide-major histocompatibility complex class I tetramer binding confirmed expansion of cells with HCMV-peptide specificity. Expansion of memory CD8(+) T cells w...
The pyrimidine, 5-methylcytosine, was demonstrated by Wyatt (1) to be a component of plant and animal deoxyribonucleic acid.’ The deoxyriboside of 5-methylcytosine was isolated from wheat germ DNA by Dekker and Elmore (a), who also characterized this nucleoside. No microorganisms or viruses have yet been shown to contain this base, although the nucleic acids of many of these organisms have been...
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
abstract: advertisements are the most accessible type of authentic materials, and this is one reason why they are used more and more in english teaching classes. for this cause, studies in the field of advertisements are very widespread nowadays. for pun is one aspect which makes advertisements more interesting, it is used more than before in advertisements. use of puns makes an advertisement m...
چکیده دیابت ملیتوس یک بیماری متابولیک است که در اثر اختلال در ترشح انسولین و یا پاسخ کاهش یافته اندامها به انسولین، ایجاد می شود. مهارگرهای ?-آمیلاز پانکراس بعنوان یک روش موثر در کاهش سطح گلوکز خون بعد از غذا از طریق کنترل تجزیه نشاسته توصیه شده است . هدف این مطالعه بررسی اثر مهاری تعدادی عصاره های گیاهی بر آنزیم ?-آمیلاز در in vitro وارزیابی تاثیر هیپوگلیسمیک موثرترین عصاره مهارگر بر سطح سرمی...
هدف از انجام این تحقیق تعیین ارزش غذایی (ترکیبات شیمیایی، قابلیت هضم و خصوصیات تجزیه پذیری) تفاله انگور، تفاله دانه انار و پوست پسته با استفاده از روشهای in situ , in vitro gas production و in vitro disappearance بود. از پلی اتیلن گلیکول 6000 برای فرآوری و غیر فعال کردن تانن ها در مواد خوراکی مورد آزمایش استفاده شد. در این تحقیق از 2 رأس گوسفند فیستوله گذاری شده جهت انجام آزمایشاتin vitro و in ...
boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...
the current study examined iranian undergraduate efl students’ willingness to communicate with regard to their vocabulary knowledge. in general, participants were somewhat willing to communicate in english. the total mean score of 730 university students’ perception of willing to communicate was 83.53 out of 135. results, regarding four parts of willingness to communicate, revealed that part...
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