نتایج جستجو برای: نانوکاتالیست و mcm

تعداد نتایج: 763790  

ژورنال: پژوهش نفت 2013
مرتضی سهرابی, کاوه کلانتری

در این پژوهش، نانو ذرات اکسید آهن (α-Fe2O3) با گستره 50-20 نانومتر به عنوان کاتالیست سنتز فیشر- تروپش در رآکتور بستر ثابت مورد ارزیابی قرار گرفت. آنالیزهای XRD, SEM و BET بر روی نانو ذرات اکسید آهن تازه و قرص نانوکاتالیست آهن تهیه شده انجام شد، تا اثر روش تهیه بر فعالیت کاتالیست بررسی گردد. نانوکاتالیست تهیه شده، فعالیت و گزینش‌پذیری مناسبی در شرایط معمولی سنتز فیشر- تروپش از خود نشان داد. به‌م...

Journal: :Glia 2006
Yoshinori Hayashi Hitoshi Ishibashi Kenji Hashimoto Hiroshi Nakanishi

We have previously reported that both transferred microglia and microglia-conditioned medium (MCM) potentiated the N-methyl-D-aspatate (NMDA) receptor-mediated synaptic responses in cortical neurons. To elucidate the mechanism underlying the potentiation of NMDA receptor-mediated responses by microglia, we examined the effects of MCM on NMDA-induced inward currents in mechanically dissociated h...

1999
Michal Kruk Mietek Jaroniec Ryong Ryoo Ji Man Kim

MCM-48 and SBA-1 samples were characterized using powder X-ray diffraction and nitrogen adsorption in a wide range of relative pressures. X-ray diffraction provided direct evidence for the high degree of pore structure ordering for the materials under study. Nitrogen adsorption showed that highly ordered MCM-48 materials exhibited sharp steps of capillary condensation and narrow pore size distr...

Journal: :Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco 2013
Jeffrey S Hertzberg Vickie L Carpenter Angela C Kirby Patrick S Calhoun Scott D Moore Michelle F Dennis Paul A Dennis Eric A Dedert Jean C Beckham

INTRODUCTION Smokers with posttraumatic stress disorder (PTSD) smoke at higher prevalence rates and are more likely to relapse early in a quit attempt. Innovative methods are needed to enhance quit rates, particularly in the early quit period. Web-based contingency-management (CM) approaches have been found helpful in reducing smoking among other difficult-to-treat smoker populations but are li...

ژورنال: نانو مواد 2015
فریدون علیخانی حصاری محمد پازوکی مهدی علیزاده ناصر یوسفی

در تحقیق حاضر ابتدا زیست ‏سنتز نانوذرات نقره بر روی نانولوله کربنی چند دیواره عامل‏دار شده (Ag/MWF-CNT) توسط قارچ آسپرجیلوس فومیگاتوس انجام شده و سپس از آن به عنوان نانوکاتالیست جهت اکسایش گاز سمی مونو اکسید کربن استفاده شده است. جهت مشخصه‏یابی نانوکاتالیست زیست ‏سنتز شده از آنالیزهای UV-Vis، FTIR، XRD، تصاویر TEM و الگوی پراش الکترونی (SAED) استفاده شده، که این آنالیزها سنتز نانوذرات کروی نقره...

2013
Yu Pan Pramod Kumar Meher

Multiple constant multiplication (MCM) scheme is widely used for implementing transposed direct-form FIR filters. While the research focus of MCM has been on more effective common subexpression elimination, the optimization of addertrees, which sum up the computed sub-expressions for each coefficient, is largely omitted. In this paper, we have identified the resource minimization problem in the...

2013
Zhiqi Wang Juan Navarrete

A zirconium modified MCM-48 mesoporous material was synthesized by surfactant-templated method. Surface grafting Zr-MCM-48 with tungstophosphoric acid led to a great enhancement of both the number of the Brønsted acid sites and acidity strength in comparison with the bare support. At 100 ̊C, the 30 wt% H3PW12O40/Zr-MCM-48 contained 174 mol/g Brønsted acid sites which were 21.7 times greater tha...

1999
Felix Munoz

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2008
Wei Liu Biagio Pucci Mosè Rossi Francesca M. Pisani Rudolf Ladenstein

The Mini-Chromosome Maintenance (MCM) proteins are candidates of replicative DNA helicase in eukarya and archaea. Here we report a 2.8 A crystal structure of the N-terminal domain (residues 1-268) of the Sulfolobus solfataricus MCM (Sso MCM) protein. The structure reveals single-hexameric ring-like architecture, at variance from the protein of Methanothermobacter thermoautotrophicus (Mth). More...

2000
J. Krause U. Pfeiffer K. Schmitt O. Stelzer

We have built and tested a mixed signal Multi-Chip Module (MCM) to be used in the Pre-Processor of the ATLAS Level-1 Calorimeter Trigger. The MCM performs high speed digital signal processing on four analogue trigger input signals. Results are transmitted serially at a serial data rate of 800 MBd. Nine chips of different technologies are mounted on a four layer copper substrate. Analogue-to-dig...

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