نتایج جستجو برای: initiator

تعداد نتایج: 7836  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1999
G S Salvesen V M Dixit

Members of the caspase family of proteases transmit the events that lead to apoptosis of animal cells. Distinct members of the family are involved in both the initiation and execution phases of cell death, with the initiator caspases being recruited to multicomponent signaling complexes. Initiation of apoptotic events depends on the ability of the signaling complexes to generate an active prote...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1970
L M Chang F J Bollum

The polymerization of deoxynucleoside triphosphates, catalyzed by terminal deoxynucleotidyl transferase from calf thymus gland, is strongly inhibited by various metal chelators. The reaction appears to be first order with respect to enzyme, deoxynucleoside triphosphate, and initiator, indicating that there is only one catalytic center for each enzyme molecule. The presence of metal chelator doe...

Journal: :I. J. Network Security 2016
Solomon Sarpong Chunxiang Xu Xiaojun Zhang

People often associate with others who share their hopes, aspirations, beliefs and experiences. This sense of belonging influences people when making friends be it physically or on social networks. Most of the existing matchmaking protocols just match-pair people without regards to the number of attributes they have in common. In lieu of these, we are proposing a hybrid matchmaking protocol tha...

2011
Mahnaz Mahdavi Mansor B. Ahmad Md. Jelas Haron Mohamad Zaki Asma Fatehi

Graft copolymerization of acrylamide (Am) onto rubberwood fibre (RWF) was carried out by free radical initiation. Ceric ammonium nitrate was used as an initiator system. The effects of temperature, dose of initiator, ratio of monomer to fibre, and nitric acid concentration, on the grafting percentage were investigated. The optimum reaction temperature was found to be about 50°C for 4h and with ...

2015
Wei-Min Cheng Xiang-Ming Hu De-Ming Wang Guo-Hua Liu Antonio Pizzi

In this study, the corn straw after removing the lignin was grafted with 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to prepare sulfonated cellulose. The grafting copolymerization between the sulfonated cellulose and acrylic acid (AA) was performed using potassium persulfate and N,N1-methylenebisacrylamide as the initiator and crosslinking agent, respectively, to prepare corn straw-co-AMPS...

2013
F. R. Cunha J. M. Costa M. Nele R. O. M. Folly M. B. Souza J. C. Pinto

The main objective of the present work is to analyze the influence of some important operational reaction parameters (agitation speed, polybutadiene – PB – content and initiator concentration) on the final properties of High Impact Polystyrene (HIPS) produced in bulk. Variable effects are analyzed both qualitatively and quantitatively with the help of a fractional factorial design. Physical, ch...

2014
M. TamilSelvan

Nowadays, most of the organizations managing data to the cloud such that an active member of the group can able to share data with other members of the group. Because of its insecure nature, we propose Initiator which acts as the middleware between the group manager and the data owners for providing versatile authentication mechanism. The initiator sends a key generation request to Group manage...

2015
Marcello Iacono Andreas Heise Walter Remo Caseri

The synthesis of polymer brush decorated silica nano-particles is demonstrated by activator regeneration by electron transfer atom transfer radical polymerization (ARGET ATRP) grafting of poly(tert-butyl methacrylate). ATRP initiator decorated silica nano-particles were obtained using a novel trimethylsiloxane derivatised ATRP initiator obtained by click chemistry. Comparison of de-grafted poly...

Journal: :Journal of colloid and interface science 2011
Bastien Barthélémy Sébastien Devillers Isabelle Minet Joseph Delhalle Zineb Mekhalif

Titanium and its alloys present high interests for technological applications due to their high corrosion resistance, mechanical properties and biocompatibility. In combination with these remarkable characteristics, some Ti applications require specific surface properties that can be imparted with suitable surface functionalizations of the TiO(2) oxide layer. The present work aims to study the ...

1997
Francis Sverdrup Gerald Myers

The papillomavirus E1 protein is the ‘initiator’ protein for viral DNA replication and thus plays a critical role in maintenance of the viral genome as an episome during the viral life cycle. E1 shows some sequence and structural similarities to the simian virus 40 and polyomavirus large T antigen initiators (12), and its biochemical properties are consistent with its role as a replication init...

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