نتایج جستجو برای: p niger 8986

تعداد نتایج: 1279751  

2014
Liu-Hui Fu Kang-Di Hu Lan-Ying Hu Yan-Hong Li Liang-Bin Hu Hong Yan Yong-Sheng Liu Hua Zhang

In this research, the antifungal role of hydrogen sulfide (H2S) on the postharvest pathogens Aspergillus niger and Penicillium italicum growing on fruits and under culture conditions on defined media was investigated. Our results show that H2S, released by sodium hydrosulfide (NaHS) effectively reduced the postharvest decay of fruits induced by A. niger and P. italicum. Furthermore, H2S inhibit...

Journal: :Applied and environmental microbiology 2004
Andrew Plumridge Stephan J A Hesse Adrian J Watson Kenneth C Lowe Malcolm Stratford David B Archer

The growth of the filamentous fungus Aspergillus niger, a common food spoilage organism, is inhibited by the weak acid preservative sorbic acid (trans-trans-2,4-hexadienoic acid). Conidia inoculated at 10(5)/ml of medium showed a sorbic acid MIC of 4.5 mM at pH 4.0, whereas the MIC for the amount of mycelia at 24 h developed from the same spore inoculum was threefold lower. The MIC for conidia ...

2017
James Sy-Keen Woon Mukram M. Mackeen Rosli M. Illias Nor M. Mahadi William J. Broughton Abdul Munir Abdul Murad Farah Diba Abu Bakar

BACKGROUND Aspergillus niger, along with many other lignocellulolytic fungi, has been widely used as a commercial workhorse for cellulase production. A fungal cellulase system generally includes three major classes of enzymes i.e., β-glucosidases, endoglucanases and cellobiohydrolases. Cellobiohydrolases (CBH) are vital to the degradation of crystalline cellulose present in lignocellulosic biom...

2005

Eight Aspergillus niger strains which produced strong starch degrading amylase were isolated from the soil using a medium containing Remazol Brilliant Blue (RBB) starch as substrate. Amylase production was detected by the disappearance of the blue colour around the colony. Among the isolates, A. niger AM07 produced the largest clear zone (7.0mm) on Remazol Brilliant Blue (RBB) agar plate and al...

Journal: :Pakistan journal of pharmaceutical sciences 2009
Heidari Mahmoud Reza Heidari Mohammad Eimani Golnaz Sepehri Gholamreza

Effects of Hyoscyamus niger L on central nervous system have been known for many years. The effects of methanolic extract of H. niger L. on seizures induced by picrotoxin was studied in mice in this investigation. In this study 7 groups of animals pretreated with methanolic extract of the plant (12.5, 25, 50, 100, 200, 300, 400 mg/kg/i.p.), 20 minutes prior to the picrotoxin (12 mg/kg/ i.p.)--i...

Journal: :Microbiology 1999
G J Ruijter P J van de Vondervoort J Visser

The external pH appeared to be the main factor governing oxalic acid production by Aspergillus niger. A glucose-oxidase-negative mutant produced substantial amounts of oxalic acid as long as the pH of the culture was 3 or higher. When pH was decreased below 2, no oxalic acid was formed. The activity of oxaloacetate acetylhydrolase (OAH), the enzyme believed to be responsible for oxalate formati...

Journal: :Zootaxa 2015
Rui Meng Vladimir M Gnezdilov Yinglun Wang

A checklist of Peltonotellus species is provided. Two new species, P. brevis sp. nov. from Ningxia Hui Autonomous Region and P. niger sp. nov. from Gansu Province are described and illustrated. Chinese species of the genus Peltonotellus as well as sexual dimorphism are briefly discussed.

2010
K. SEN A. GOEL S. RAWAL Kalyan Sen

The antimicrobial activities of aqueous, ethanolic and petroleum ether extracts of the leaves of Basella rubra were evaluated in the present study by measuring the inhibition zones using Cup Plate Diffusion method. The inhibition zones were significantly different (P<0.001) in each plant extract. The ethanolic extract showed maximum activity with zone of inhibition (14.3±1.82 mm) against E.coli...

2013
Harsha Kharkwal H. Kharkwal R. Prasad

The antifungal activity of the dealcoholized extract of the leaves of Clerodendrum infortunatum Retz. was determined on four different fungal organisms. The crude leaf extract significantly inhibited the growth of A. niger; P. frequentance; P. notataum and B. cinera when tested by turbidity and spore germination methods in concentration dependent fashion. The effects produced by the extract wer...

2017
Dorett I. Odoni Merlijn P. van Gaal Tom Schonewille Juan A. Tamayo-Ramos Vitor A. P. Martins dos Santos Maria Suarez-Diez Peter J. Schaap

Aspergillus niger has an innate ability to secrete various organic acids, including citrate. The conditions required for A. niger citrate overproduction are well described, but the physiological reasons underlying extracellular citrate accumulation are not yet fully understood. One of the less understood culture conditions is the requirement of growth-limiting iron concentrations. While this ha...

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