نتایج جستجو برای: sos

تعداد نتایج: 4511  

Journal: :Journal of biological physics 1999
S V Aksenov

The SOS response in Escherichia coli is induced after DNA-damaging treatments including ultraviolet light. Regulation of the SOS response is accomplished through specific interaction of the two SOS regulator proteins, LexA and RecA. In ultraviolet light-treated cells, nucleotide excision repair is the major system that removes the induced lesions from the DNA. Here, induction of the SOS respons...

2016
Wangxun Zhang Zhifei Li Weiping Wang Qun Li

The characteristics of the system of systems (SoS) present great challenges to the safety analysis of Global Navigation Satellite Systems (GNSS). Traditional safety analysis methods and techniques do not work well in a complex SoS, so new safety analysis technologies are needed to adapt to safety problems in SoS. This study first expounds upon the shortcomings of traditional safety analysis met...

Journal: :Neuron 2006
Long Yang Greg J. Bashaw

Son of sevenless (Sos) is a dual specificity guanine nucleotide exchange factor (GEF) that regulates both Ras and Rho family GTPases and thus is uniquely poised to integrate signals that affect both gene expression and cytoskeletal reorganization. Here, using genetics, biochemistry, and cell biology, we demonstrate that Sos is recruited to the plasma membrane, where it forms a ternary complex w...

2008
Jarunee Hongrapipat Pavla Kopečková Jihua Liu Sompol Prakongpan Jindřich Kopeček

The biological activities of sequential combinations of anticancer drugs, SOS thiophene (SOS) and mesochlorin e 6 monoethylenediamine (Mce 6), in the form of free drugs, nontargeted N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer-drug conjugates, P-GFLG-Mce 6 and P-GFLG-SOS (P is the HPMA copolymer backbone and GFLG is the glycylphenylalanylleucylglycine spacer), and Fab'-targeted HPMA copol...

2016
Charlie Y. Mo Sara A. Manning Manuela Roggiani Matthew J. Culyba Amanda N. Samuels Paul D. Sniegowski Mark Goulian Rahul M. Kohli

The bacterial SOS response is a DNA damage repair network that is strongly implicated in both survival and acquired drug resistance under antimicrobial stress. The two SOS regulators, LexA and RecA, have therefore emerged as potential targets for adjuvant therapies aimed at combating resistance, although many open questions remain. For example, it is not well understood whether SOS hyperactivat...

Journal: :EURASIP J. Image and Video Processing 2007
Yutaka Satoh Katsuhiko Sakaue

To support safe self-movement of the disabled and the aged, we developed an electric wheelchair that realizes the functions of detecting both the potential hazards in a moving environment and the postures and gestures of a user by equipping an electric wheelchair with the stereo omnidirectional system (SOS), which is capable of acquiring omnidirectional color image sequences and range data simu...

Journal: :CoRR 2008
Frédéric Autran Jean-Philippe Auzelle Denise Cattan Jean-Luc Garnier Dominique Luzeaux Frédérique Mayer Marc Peyrichon Jean-René Ruault

Systems of systems (SoS) are a hot topic in our “fully connected global world”. Our aim is not to provide another definition of what SoS are, but rather to focus on the adequacy of reusing standard system architecting techniques within this approach in order to improve performance, fault detection and safety issues in large-scale coupled systems that definitely qualify as SoS, whatever the defi...

2017
Bryan E Bunnell Jillian F Escobar Kirsten L Bair Mark D Sutton John K Crane

Zinc inhibits the virulence of diarrheagenic E. coli by inducing the envelope stress response and inhibiting the SOS response. The SOS response is triggered by damage to bacterial DNA. In Shiga-toxigenic E. coli, the SOS response strongly induces the production of Shiga toxins (Stx) and of the bacteriophages that encode the Stx genes. In E. coli, induction of the SOS response is accompanied by ...

2016
Pia H Puhakka Nikae C R te Moller Petri Tanska Simo Saarakkala Virpi Tiitu Rami K Korhonen Harold Brommer Tuomas Virén Jukka S Jurvelin Juha Töyräs

Background and purpose - Arthroscopic estimation of articular cartilage thickness is important for scoring of lesion severity, and measurement of cartilage speed of sound (SOS)-a sensitive index of changes in cartilage composition. We investigated the accuracy of optical coherence tomography (OCT) in measurements of cartilage thickness and determined SOS by combining OCT thickness and ultrasoun...

2015
Ezequiel Moreira Gonçalves Roberto Regis Ribeiro Wellington Roberto Gomes de Carvalho Anderson Marques de Moraes Everton Paulo Roman Keila Donassolo Santos Pedro Augusto Rodrigues Medaets Nélio Neves Veiga-Junior Adrielle Caroline Lace de Moraes Coelho Tathyane Krahenbühl Leticia Esposito Sewaybricker Antonio de Azevedo Barros-Filho Andre Moreno Morcillo Gil Guerra-Júnior Tuan Van Nguyen

AIMS To establish normative data for phalangeal quantitative ultrasound (QUS) measures in Brazilian students. METHODS The sample was composed of 6870 students (3688 females and 3182 males), aged 6 to 17 years. The bone status parameter, Amplitude Dependent Speed of Sound (AD-SoS) was assessed by QUS of the phalanges using DBM Sonic BP (IGEA, Carpi, Italy) equipment. Skin color was obtained by...

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