نتایج جستجو برای: ping pong mechanism

تعداد نتایج: 567866  

Journal: :RNA 2010
Akihiro Nagao Toutai Mituyama Haidong Huang Dahua Chen Mikiko C Siomi Haruhiko Siomi

PIWI-interacting RNAs (piRNAs) silence transposable elements in animal germ cells. In Drosophila ovaries, piRNAs are produced by two distinct pathways: the "ping-pong" amplification cycle that operates in germ cells and a ping-pong-independent pathway termed the primary pathway that mainly operates in somatic cells. AGO3, one of three PIWI proteins in flies, is involved in the ping-pong cycle i...

Journal: :Journal of the Japanese Society of Snow and Ice 1993

Journal: :Emergency Medicine Journal 2007

2013
Haysam Alradwan Kinan Ghanem

Improving system performance in terms of data rate, mobility and cost is the scope of Long Term Evolution (LTE) system. In LTE networks the handover (HO) decision is performed by the evolved base station (eNB). The ping-pong movement in LTE is one of the most crucial problems which reduce the quality of the connection and degrade the performance of the handover. In this paper, the impact of pin...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
mohammad mansouri majoumerd hamid reza kariminia

in this study, decolorization of the diazo dye, reactive black 5 (rb5) in a coprinus cinereus peroxidase-catalyzed reaction has been investigated. a bisubstate kinetic model for the reaction rate based on the ping-pong mechanism was assumed for the enzymatic decolorization. experimentswere conducted at different rb5 and hydrogen peroxideconcentrations in a batch mannerto estimate the intrinsic ...

Journal: :BMJ Case Reports 2016

2002
Guangbin Fan Ivan Stojmenovic Jingyuan Zhang

Location areas is a popular location management scheme in cellular networks. In the location areas scheme, a mobile terminal updates its location whenever it moves into a cell that belongs to a new location area. However, no matter how the location areas are designed, the ping-pong location update effect exists when a mobile terminal moves back and forth between two location areas. The paper de...

2011
WANG Yu

Brief author introduction:Wang Yu, (1985-),Male, Information Processing. E-mail: [email protected] Abstract: As we know, hard handover scheme is adopted for LTE systems in recent years. In order to improve the performance of the overall system, L3-filter, hysteresis, and time-to-trigger window are investigated. In this paper, we propose a new mechanism with an adaptive time to trigger windo...

2008
Hiroyuki Shinnou Minoru Sasaki

This paper proposes a ping-pong document clustering method using NMF and the linkage based refinement alternately, in order to improve the clustering result of NMF. The use of NMF in the ping-pong strategy can be expected effective for document clustering. However, NMF in the ping-pong strategy often worsens performance because NMF often fails to improve the clustering result given as the initi...

2005
Mikhail Yu Robert C. BATEMAN

Acyl-transfer catalysed by y-glutamyltranspeptidase from bovine kidney was studied using y-Land y-D-Glu-p-nitroanilide as the donor and GlyGly as the acceptor. The transfer of the y-Glu group to GlyGly was shown to be accompanied by transfer of the y-Glu group to water (hydrolysis). The results were compared with acyl-transfer catalysed by the representative serine protease, a-chymotrypsin. The...

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