Results 161 to 170 of about 3,804 (200)

Aspergillus flavus and Aspergillus ochraceus inhibition and reduction of aflatoxins and ochratoxin A in maize by irradiation

Toxicon, 2021
Grains are susceptible to contamination by molds; some cause spoilage and others produce certain mycotoxins that cause a serious health threat to humans and animals. Aspergillus flavus and Aspergillus ochraceus and their mycotoxins, aflatoxins and ochratoxin A, are natural contaminants of various agricultural commodities.
Ola A.A. Khalil, Ali A. Hammad, Ahmed Salem Sebaei   +2 more
openaire   +2 more sources

The biosynthesis of the ochratoxins, metabolites of aspergillus ochraceus

Phytochemistry, 1970
Abstract The biosynthesis of ochratoxin A (Ia) was studied in Aspergillus ochraceus Wilh. by experiments in which dl -phenylalanine [U- 14 C], sodium acetate [1- 14 C] and methionine [ 14 CH 3 ] were supplied to a resting culture of the fungus. The carboxyl carbon of the amide group is shown to be derived from the C 1 -pool.
P.S. Steyn, C.W. Holzapfel, N.P. Ferreira   +2 more
openaire   +1 more source

Ultrastructure of Dormant and Germinating Conidia of Aspergillus ochraceus

Mycologia, 1989
Ultrastructural changes during germination of Aspergillus ochraceus conidia were studied. The following ontogenetic stages were observed: 1) dormant state; 2) hydration and expansion; 3) aggregatio...
R. R. Dute, J. D. Weete, A. E. Rushing
openaire   +1 more source

Metabolites of ochratoxins in rat urine and in a culture of Aspergillus ochraceus

Applied and Environmental Microbiology, 1996
We studied the metabolic profile of ochratoxin A (OA) in rats and in a culture of OA-producing Aspergillus ochraceus. Ochratoxin alpha (O alpha), ochratoxin beta (O beta), 4-R-hydroxyochratoxin A (4-R-OH OA), 4-R-hydroxyochratoxin B (4-R-OH OB), and 10-hydroxyochratoxin A (10-OH OA) were isolated from a culture of A.
H, Xiao, R R, Marquardt, D, Abramson, A A, Frohlich   +3 more
openaire   +2 more sources

New Diketopiperazine Metabolites from the Sclerotia of Aspergillus ochraceus

Journal of Natural Products, 1992
Three new diketopiperazine-containing metabolites 1-3 have been isolated from the sclerotia of Aspergillus ochraceus (NRRL 3519) by chromatography on Sephadex LH-20 and reversed-phase hplc. The structures of these compounds were established using extensive high-field 1D and 2D nmr experiments. All three compounds cause moderate reduction in weight gain
F S, de Guzman, J B, Gloer, D T, Wicklow, P F, Dowd   +3 more
openaire   +2 more sources

Isolation of secondary metabolites of Aspergillus ochraceus by HPLC

Mycotoxin Research, 1986
A method is described for the isolation and purification of ochratoxin A, ochratoxin B, ochratoxin ß mellein, 4-hydroxymellein and penicillic acid produced byAspergillus ochraceus in a synthetic liquid medium. Ochratoxin α, which was not found in the culture medium, was obtained by acid hydrolysis of ochratoxin A.
openaire   +2 more sources

Biodegradation of kerosene by Aspergillus ochraceus NCIM‐1146

Journal of Basic Microbiology, 2007
AbstractThe filamentous fungus Aspergillus ochraceus NCIM‐1146 was found to degrade kerosene, when previously grown mycelium (96 h) was incubated in the broth containing kerosene. Higher levels of NADPH‐DCIP reductase, aminopyrine N‐demethylase and kerosene biodegradation activities were found to be present after the growth in potato dextrose broth for
Ganesh, Saratale, Satish, Kalme, Sanjyot, Bhosale, Sanjay, Govindwar   +3 more
openaire   +2 more sources

Steroid 11-Alpha-Hydroxylation by the Fungi Aspergillus nidulans and Aspergillus ochraceus

2017
Steroids are a group of natural compounds derived from the cyclopentane-perhydro-phenantrene nucleus that have a great interest for the pharmaceutical industries as a consequence of their physiological effects. Among their functions are anti-inflammatory, immunosuppressive, or contraceptive activities.
Lidia Ortega-de Los, Ríos, José M, Luengo, José M, Fernández-Cañón   +2 more
openaire   +2 more sources

The component fatty acids of Aspergillus ochraceus fat

Journal of the Science of Food and Agriculture, 1973
AbstractAspergillus ochraceus, grown as a surface culture in a chemically defined medium of sucrose and inorganic salts, gave a high yield of fat (47.5%) the main component acids of which were shown to be myristic (0.2%); palmitic (37.6%); stearic (0.1%); oleic (14.6%); linoleic (45.3%); and linolenic (2.2%).
M G, Sood, J, Singh
openaire   +2 more sources

Ochratoxin A, a Toxic Metabolite produced by Aspergillus ochraceus Wilh.

Nature, 1965
Aspergillus ochraceus Wilh. is widely distributed in Nature and often found in soil and on decaying vegetation. It is, however, also known to invade stored wheat with moisture contents more than 16 per cent1. In the far east, Asp. ochraceus and allied species have been reported as constituents of the mycoflora characteristic of ‘katsuobushi’ and other ...
K J, van der Merwe, P S, Steyn, L, Fourie, D B, Scott, J J, Theron   +4 more
openaire   +2 more sources