نتایج جستجو برای: indian ber

تعداد نتایج: 83669  

2015
Arun Kumar Singh Rabindranath Bera Bansibadan Maji H. Ochiai P. Mitran H. Poor G. Mateos I. D. Schizas

This work investigates the improvement in Bit Error Rate (BER) with different antenna configuration using beamforming technique. In this paper Linearly Constrained Minimum Variance (LCMV) beamforming is used and based on this BER graph is plotted. The idea is to show improvement in BER performance with increasing number of antenna and also to show that the data rate can be increased if BER is b...

Introduction: Indian childhood cirrhosis is a chronic liver disease usually seen in paediatric age group and is unique to the Indian subcontinent. The definitive causative factor for the disease is not found till now but excess copper ingestion has been associated with it.Case presentation: An Indian origin one and half year old premorbidly normal male child presented with history of gradual di...

Journal: :Neurobiology of aging 2009
Lior Weissman Nadja C de Souza-Pinto Mark P Mattson Vilhelm A Bohr

Alzheimer's disease (AD) has been correlated with elevated levels of oxidative DNA damage. Base excision repair (BER) is the main repair pathway for the removal of oxidative DNA base modifications. We have recently found significant functional deficiencies in BER in brains of sporadic AD and amnestic mild cognitive impairment patients. In this study we tested whether altered BER activities are ...

Journal: :Physical review letters 2004
V Chernyak M Chertkov M G Stepanov B Vasic

We introduce a method that allows analytical or semianalytical estimating of the post-error correction bit error rate (BER) when a forward-error correction is utilized for transmitting information through a noisy channel. The generic method that applies to a variety of error-correction schemes in the regimes where the BER is low is illustrated using the example of a finite-size code approximate...

Journal: :مهندسی برق و الکترونیک ایران 0
s. sadough a. mahmood e. jaffrot pierre duhamel

this paper investigates the multi-band ofdm (mb-ofdm) based physical (phy) layer proposal for ieee 802.15.3a working group on short-range high data-rate ultra-wide-band (uwb) communications. an overview of the mb-ofdm phy layer architecture with its various parameters is presented and the optimal choice of critical parameters is discussed. next, we derive the theoretical un-coded bit error rate...

2014
Yan Zhao Jian-Li Gao Jian-Wei Ji Min Gao Qiao-Shan Yin Qiao-Li Qiu Chuan Wang Shu-Zhan Chen Juan Xu Ren-Shang Liang Yan-Zi Cai Xia-Fei Wang

AIM Our previous works have demonstrated that Chinese herb medicine yanhusuo (Corydalis yanhusuo W. T. Wang) has strong anti-cancer proliferation effect in MDA-MB-231 cells. The goal of this study was to find out the synergic cytotoxicity effect of three natural compounds, tetrahydropalmatine (THP), berberine (Ber), and dehydrocorydaline (DHC), isolated from C. yanhusuo W. T. Wang. MATERIALS ...

Journal: :Cancer research 2010
Gregory C Stachelek Shibani Dalal Katherine A Donigan Denise Campisi Hegan Joann B Sweasy Peter M Glazer

Base excision repair (BER) plays a critical role in the repair of bases damaged by oxidative metabolism or alkylating agents, such as those commonly used in cancer therapy. Incomplete BER generates intermediates that require activation of homology-dependent DNA repair to resolve. We investigated the effects of lithocholic acid (LCA), an inhibitor of the key BER enzyme DNA polymerase beta (pol b...

Journal: :Molecular cancer research : MCR 2014
Julie K Horton Donna F Stefanick Rajendra Prasad Natalie R Gassman Padmini S Kedar Samuel H Wilson

UNLABELLED PARP-1 is important for the recognition of both endogenous and exogenous DNA damage, and binds to DNA strand breaks including intermediates of base excision repair (BER). Once DNA-bound, PARP-1 becomes catalytically activated synthesizing PAR polymers onto itself and other repair factors (PARylation). As a result, BER repair proteins such as XRCC1 and DNA polymerase β (pol β) are mor...

2008
Wenjian Ma Michael A. Resnick Dmitry A. Gordenin

Base excision repair (BER) provides relief from many DNA lesions. While BER enzymes have been characterized biochemically, BER functions within cells are much less understood, in part because replication bypass and double-strand break (DSB) repair can also impact resistance to base damage. To investigate BER in vivo, we examined the repair of methyl methanesulfonate (MMS) induced DNA damage in ...

2017
Yaou Ren Yanhao Lai Eduardo E Laverde Ruipeng Lei Hayley L Rein Yuan Liu

Trinucleotide repeat (TNR) instability is associated with human neurodegenerative diseases and cancer. Recent studies have pointed out that DNA base excision repair (BER) mediated by DNA polymerase β (pol β) plays a crucial role in governing somatic TNR instability in a damage-location dependent manner. It has been shown that the activities and function of BER enzymes and cofactors can be modul...

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