نتایج جستجو برای: modification mechanism

تعداد نتایج: 683076  

2016
Michael A. Close Leslie A. Lytle Anthony J. Viera

Studies have shown that frequency of fast food restaurant eating and sit-down restaurant eating is differentially associated with nutrient intakes and biometric outcomes. The objective of this study was to examine whether frequency of fast food and sit-down restaurant eating occasions was differentially associated with less healthful eating habits, independent of demographic characteristics. Da...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده حقوق و علوم سیاسی 1390

چکیده : نظام انتخاباتی قواعد و چار چوب های به رسمیت شناخته شده ای است که بیانگر چگونگی تبدیل آرای مردم به مناصب و پست های سیاسی است. این نظام انتخابات باید به گونه ای عمل کند که نتیجه آن فراهم شدن مکانیسم و ساز و کار مطلوب و مناسب برای برگزاری انتخابات سالم و رقابتی باشد. به نظر می رسد نظام انتخاباتی جمهوری اسلامی ایران دارای ضعف ها و نواقصی است که به سبب آن ها نمی توان انتخابات مطلوب را برگزا...

Hossein Anaraki-Ardakani Sajjad Bakhshi-Homaldinraviz

Abstract: The reactive 1:1 intermediate produced in the reaction between cyclohexyl isocyanide and electron- deficient acetylenic esters or dimethyl acetylene dicarboxylate was trapped by 2-cyano-N-(Aryl) acetamides to provides highly functionalized oxopyridine (potential synthetic and pharmaceutical interest )  in  acetonitrile under mild reaction conditions at ambient temperature after 24 h ...

Sulfur mustard (SM, bis- (2-chloroethyl) sulphide) is a chemical warfare agent that causes DNA alkylation, protein modification and membrane damage. SM can trigger several molecular pathways involved in inflammation and oxidative stress, which cause cell necrosis and apoptosis, and loss of cells integrity and function. Epigenetic regulation of gene expression is a growing research topic and is ...

LoRaWAN is one of the new and updated standards for IoT applications. However, the expected high density of peripheral devices for each gateway, and the absence of an operative synchronization mechanism between the gateway and peripherals, all of which challenges the networks scalability. In this paper, we propose to normalize the communication of LoRaWAN networks using a Reservation-ALOHA (R-A...

In recent years, plasma treatments have given good results since they offer high technological efficiency with low waste generation. One of the most important characteristics of plasma methods is their action only on a thin surface layer, whereas the bulk of sample remains unchanged and the modified material keeps its chemical and mechanical properties. In this research, polyurethane membrane s...

2013
Joo Heon Shin Robert W. Li Yuan Gao Derek M. Bickhart George E. Liu Weizhong Li Sitao Wu Cong-jun Li

Histone modification has emerged as a very important mechanism regulating the transcriptional status of the genome. Insulin-like growth factor 2 (IGF2) is a peptide hormone controlling various cellular processes, including proliferation and apoptosis. H19 gene is closely linked to IGF2 gene, and IGF2 and H19 are reciprocally regulated imprinted genes. The epigenetic signature of H19 promoter (h...

Journal: :Catalysts 2023

K and Na have been widely used in photocatalytic H2O2 production. However, Rb Cs rarely studied for their potentials. In addition, the mechanism regulating production from different alkali metal (M)-modified polymeric carbon nitride (PCN) is still unknown. Therefore, M-doped PCN was fabricated using thermal copolymerization presence of Li, Na, K, Rb, or Cs. The activity CN-M enhanced by increas...

Journal: :Chinese Physics 2023

A novel mesoporous silica foam (MCF) with a specific surface area of 712.5 m<sup>2</sup>/g and pore volume 2.44 cm<sup>3</sup>/g was synthesized by using triblock copolymer poly (ethylene oxide, polypropylene oxide ethylene P123) as template TEOS (C<sub>8</sub>H<sub>20</sub>O<sub>4</sub>Si) silicon source. The effect polyethylenimide (...

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