نتایج جستجو برای: ahl

تعداد نتایج: 902  

Journal: :Jurnal Studi Islam Lintas Negara (Journal of Cross-Border Islamic Studies) 2023

Yahudi dan Nasrani disebut sebagai Ahl kitab adalah karena Allah telah menggutus Nabi-nabi ditengah-tengah mereka membawa masing-masing. Kitab Taurah kapada nabi Musa As yang kemudian isinya dirubah. Umat tersebut yahudi Injil kepada Isa As. Yang pengikutnya nasrani. Mereka ahl pada dasarnya diturunkan murni dari Allah. berbeda dengan agama dibuat berdasarkan kepercayaan dikolaborasi oleh buday...

Journal: :Journal of animal science 2008
J B Gaughan T L Mader S M Holt A Lisle

The ability to predict the effects of extreme climatic variables on livestock is important in terms of welfare and performance. An index combining temperature and humidity (THI) has been used for more than 4 decades to assess heat stress in cattle. However, the THI does not include important climatic variables such as solar load and wind speed (WS, m/s). Likewise, it does not include management...

Journal: :Plant physiology 2004
Max Teplitski Hancai Chen Sathish Rajamani Mengsheng Gao Massimo Merighi Richard T Sayre Jayne B Robinson Barry G Rolfe Wolfgang D Bauer

The unicellular soil-freshwater alga Chlamydomonas reinhardtii was found to secrete substances that mimic the activity of the N-acyl-L-homoserine lactone (AHL) signal molecules used by many bacteria for quorum sensing regulation of gene expression. More than a dozen chemically separable but unidentified substances capable of specifically stimulating the LasR or CepR but not the LuxR, AhyR, or C...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Hai-Bao Zhang Lian-Hui Wang Lian-Hui Zhang

A signal turnover system is an essential component of many genetic regulatory mechanisms. The best-known example is the ubiquitin-dependent protein degradation system that exists in many organisms. We found that Agrobacterium tumefaciens adopts a unique signal turnover system to control exiting from a quorum-sensing mode. A. tumefaciens regulates Ti plasmid conjugal transfer by a quorum-sensing...

2016
Önder Kimyon Zehra İ. Ulutürk Shashidhar Nizalapur Matthew Lee Samuel K. Kutty Sabrina Beckmann Naresh Kumar Mike Manefield

N-acetyl glucosamine, the monomer of chitin, is an abundant source of carbon and nitrogen in nature as it is the main component and breakdown product of many structural polymers. Some bacteria use N-acyl-L-homoserine lactone (AHL) mediated quorum sensing (QS) to regulate chitinase production in order to catalyze the cleavage of chitin polymers into water soluble N-acetyl-D-glucosamine (NAG) mon...

Journal: :BMC Biotechnology 2008
Steve P Bernier Anne L Beeston Pamela A Sokol

BACKGROUND Bacteria use N-acyl homoserine lactone (AHL) molecules to regulate the expression of genes in a density-dependent manner. Several biosensors have been developed and engineered to detect the presence of all types of AHLs. RESULTS In this study, we describe the usefulness of a traI-luxCDABE-based biosensor to quickly detect AHLs from previously characterized mutants of Burkholderia c...

Journal: :Microbiology 2008
M D P Willcox H Zhu T C R Conibear E B H Hume M Givskov S Kjelleberg S A Rice

Pseudomonas aeruginosa is a ubiquitous bacterium that causes opportunistic infections in a range of host tissues and organs. Infections by P. aeruginosa are difficult to treat and hence there is interest in the development of effective therapeutics. One of the key mechanisms that P. aeruginosa uses to control the expression of many virulence factors is the N-acylated homoserine lactone (AHL) re...

2012
Eoin P. O'Grady Duber F. Viteri Pamela A. Sokol

Burkholderia cenocepacia causes chronic and life-threatening respiratory infections in immunocompromized people. The B. cenocepacia N-acyl-homoserine lactone (AHL)-dependent quorum sensing system relies on the production of AHLs by the synthases CepI and CciI while CepR, CciR and CepR2 control expression of many genes important for pathogenesis. Downstream from, and co-transcribed with cepI, li...

Journal: :Analytical and bioanalytical chemistry 2007
Christine Götz Agnes Fekete Istvan Gebefuegi Sándor T Forczek Kvetoslava Fuksová Xiaojing Li Matthias Englmann Milan Gryndler Anton Hartmann Miroslav Matucha Philippe Schmitt-Kopplin Peter Schröder

Bacterial intraspecies and interspecies communication in the rhizosphere is mediated by diffusible signal molecules. Many Gram-negative bacteria use N-acyl-homoserine lactones (AHLs) as autoinducers in the quorum sensing response. While bacterial signalling is well described, the fate of AHLs in contact with plants is much less known. Thus, adsorption, uptake and translocation of N-hexanoyl- (C...

2011
P. D. Rekha Chiu-Chung Young A. B. Arun

Many members of the genus Chromobacterium produce violacein, a characteristic purple pigment which is induced by small diffusible N-acyl homoserine lactones (AHL) quorum-sensing molecules. In this study, the production of AHL of the non-pigmented C. aquaticum CC-SEYA-1(T) and the pigmented C. subtsugae PRAA4-1(T) were determined by using a CV026 biosensor assay. The profile of AHL was identifie...

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