background: one of the most important producers of high quality industrial enzymes is the gram-positive bacterium, bacillus subtilis (b. subtilis). one major limitation that hinders the wide application of b. subtilis is the secretion of high levels of extracellular proteases which degrade the secreted foreign proteins. in this study, homologus recombination technique was used to knock out its ...

The mycotoxin Citrinin was obtained from the fungus Penicillium citrinum. It was tested for it's Minimum Inhibitory Concentration (MIC) against some gram positive strains viz. Staphylococcus aureus, Bacillus pumilus, Bacillus subtillis, Bacillus cereus, Klebsiella pneumoniae, Streptococcus pneumoniae, Lactobacillus arabinosus and gram negative strains E.Coli, Shigella dysenteriae, shigella sonn...

introduction bacterial biofilms can be both useful and harmful based on their combination and locations. biofilm formation occurs as a stepwise process. their formation in liquid transportation pipes used for milking system and drinking water in animal farms may create some problems and is a potential source of pollution. speed of biofilm formation depends on many factors including: constructio...

Dado a necessidade de reduzir os custos produção e disponibilizar produtos livres agrotóxicos na cadeia suprimentos da melancia, o objetivo com este estudo foi avaliar influência das bactérias do gênero Bacillus subtilis megaterium germinação biometria sementes plântulas melancia cv. Sugar Baby. A pesquisa realizada no Centro Ciências Chapadinha, Universidade Federal Maranhão (CCCh/UFMA). O con...

In this report, a new series of fluoroquinolone agents which was derived from levofloxacin was synthesized and evaluated against Gram-positive (Bacillus subtillis, Staphylococcus aureus, Staphylococcus epidermidis and Micrococcus luteus) and Gram-negative (Esherichio coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Serratia marcescens) organisms. The results showed that some of the synth...

Nghiên cứu này đã đánh giá hoạt tính kháng khuẩn và chống oxy hóa của cao chiết tổng (EC); các phân đoạn: n-hexan (ECH), etyl axetat (ECE) metanol (ECM) từ lá cây đơn đỏ ở Tuyên Quang, kết quả như sau: Cao EC ức chế sự phát triển 4 chủng vi nấm Bacillus subtillis, Staphylococcus aureus, Fusarium oxysporum Saccharomyces cerevisiae; ECH 3 aureus ECE thể hiện Và ECM Escherichia coli subtillis với ...

Four new polycyclic antibiotics, citreamicin θ A (1), citreamicin θ B (2), citreaglycon A (3), and dehydrocitreaglycon A (4), were isolated from marine-derived Streptomyces caelestis. The structures of these compounds were elucidated by 1D and 2D NMR spectra. All four compounds displayed antibacterial activity against Staphylococcus haemolyticus, Staphylococcus aureus, and Bacillus subtillis. C...