N-Acylhomoserine lactones (AHLs) function as quorum-sensing signaling molecules in many Gram-negative bacteria. We isolated a total of 672 bacterial strains from activated sludge obtained from seven sewage treatment plants in Tochigi Prefecture, Japan, and screened for AHL-producing and degrading strains. Isolates (n = 107) stimulated AHL-mediated purple pigment production in AHL reporter strai...

prophet mohammad (pbuh) has always recommended the pious to be faithful to the islamic ethics and behave fairly toward all people. quranic verses and hadiths of ahl-ol-bayt all emphasize on the fact that even in the face of heretical people and movements, justice and morality should not be violated and moreover religion should never be defended employing deceitful and rebuking ways. but in the ...

Ahmet Çıtak (1893 – 1963) one of the most important but those whom hadn’t been studied enough minstrels 20th century. He was born to a wealthy family in Elbistan, Kahramanmaraş, located on course Archaic Silk-Road and Spice-Road. His mother named him Şeyh Hamit, after being asked by two saintly looking sages name his son dream, father changed into Ahmet. strived for receive good education sent ...

Hanefî fıkhının müdevvini ve rey birikimini sistematize eden bir âlim olan Şeybânî, Ebû Hanîfe’den Yûsuf’tan ilim tahsilini gerçekleştirdikten sonra dönemin önemli merkezi Medîne’ye yolculuk yapmış Mâlik’in ders halkasına katılarak Muvatta'ın râvîlerinden biri olmuştur. Şeybânî başta Mâlik olmak üzere Hicâz ulemasıyla yaptığı münazaraları onlara yönelttiği tenkitleri el-Ḥucce ‘alâ ehli’l-Medîne...

Many pathogenic bacteria that infect humans, animals and plants rely on a quorum-sensing (QS) system to produce virulence factors. N-Acyl homoserine lactones (AHLs) are the best-characterized cell-cell communication signals in QS. The concentration of AHL plays a key role in regulating the virulence-gene expression and essential biological functions of pathogenic bacteria. N-Acyl homoserine lac...

Genomes of Salmonella enterica isolates, including those linked to outbreaks of produce-associated gastroenteritis, contain sdiA, which encodes a receptor of N-acyl homoserine lactones (AHL). AHL are the quorum-sensing signals used by bacteria to coordinately regulate gene expression within -their populations. Because S. enterica does not produce its own AHL, SdiA is hypothesized to function in...

During quorum sensing in the plant pathogen Pantoea stewartii subsp. stewartii, EsaI, an acyl-homoserine lactone (AHL) synthase, and the transcription factor EsaR coordinately control capsular polysaccharide production. The capsule is expressed only at high cell density when AHL levels are high, leading to inactivation of EsaR. In lieu of detailed structural information, the precise mechanism w...