نتایج جستجو برای: aspergillus niger

تعداد نتایج: 29854  

Journal: :Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2007
Natalia Nugaeva Karin Y Gfeller Natalia Backmann Marcel Düggelin Hans Peter Lang Hans-Joachim Güntherodt Martin Hegner

We demonstrate a new sensitive biosensor for detection of vital fungal spores of Aspergillus niger. The biosensor is based on silicon microfabricated cantilever arrays operated in dynamic mode. The change in resonance frequency of the sensor is a function of mass binding to the cantilever surface. For specific A. niger spore immobilization on the cantilever, each cantilever was individually coa...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2008
Nastaran Momen-Roknabadi Ahamd R Gohari Hamid R Monsef-Esfehani Farideh Attar Reza Hajiaghaee Soodabeh Saeidnia Hossein Jamalifar Golnaz Kamalinia Ahamd R Shahverdi

The antimicrobial activity of ethanol and chloroform extracts of Pentanema divaricatum Cass. was studied using the conventional disk diffusion method. The extracts' highest antimicrobial activity was observed against Aspergillus niger. Bioassay-guided fractionation of the crude extract by preparative thin layer chromatography (PTLC) showed one antimicrobial fraction which was especially effecti...

Journal: :Revista iberoamericana de micologia 1997
L C Severo G R Geyer N da S Porto M B Wagner A T Londero

In this study we have compared clinical data obtained from 40 reported cases of pulmonary Aspergillus niger intracavitary colonization in the literature and those of our series 23 cases. Additionaly six of our cases have been summarized. Our findings revealed a similar occurrence of male sex, active tuberculosis, diabetes mellitus, systemic oxalosis, and lethal outcome in both groups. In conclu...

Journal: :Polish journal of microbiology 2005
Anna Koziróg Sławomir Kuberski Zofia Zakowska Bogumił Brycki

Resistance causes of moulds to N,N-bis(3-aminopropyl)dodecylamine (APDA) for selected species of Aspergillus niger and Aspergillus flavus was examined. Control (sensitive) strains and resistant strains, cultured at 0.05% triamine, were used in the experiments. The non-resistant strains did not have growth capacity in this amount of ADPA while the resistant strains were characterised by a smalle...

Journal: :Journal of clinical microbiology 2004
Ricardo Araujo Acacio Gonçalves Rodrigues

The objective of our study was to evaluate parameters influencing the germination of Aspergillus conidia. Inoculum concentration and age significantly influenced germination. Different incubation temperatures revealed significant differences among Aspergillus species. The internal human milieu provides the ideal conditions for the development of invasive disease by Aspergillus fumigatus but res...

Journal: :Chemical & pharmaceutical bulletin 1999
T Hashimoto Y Noma S Kato M Tanaka S Takaoka Y Asakawa

Biotransformation of the sesquiterpene alcohol hinesol (1) with spasmolytic activity, which was prepared from the rhizome of Atractylodes lancea, was carried out by Aspergillus niger and Aspergillus cellulosae IFO 4040. Compound 1 was easily converted to compounds 2-9 by A. niger, and compounds 10 and 11 by A. cellulosae, respectively. Their stereostructures were established by a combination of...

2015
Ajayi

Aspergillus niger is a soil saprobe and produces a wide array of hydrolytic and oxidative enzymes and cell wall degrading enzymes. An investigation on the various properties of partially purified polygalacturonase and cellulase enzymes extracted from tomato fruits deteriorated by Aspergillus niger was carried out in this study. The results obtained shows that temperature, pH and substrate conce...

Journal: :Polish journal of microbiology 2008
Yasser Bakri Manal Al-Jazairi Ghassan Al-Kayat

Xylanase production by a newly isolated Aspergillus niger SS7 was studied in submerged culture. The optimum initial pH for xylanase production was found to be 7.0. Different agricultural and industrial wastes were evaluated for their ability to induce xylanase production by this isolate. The best xylanase production (293.82 IU/ml) was recorded at 3% (w/v) corn cob hulls after 120 h of incubatio...

Journal: :Canadian journal of microbiology 1983
B W Horn D T Wicklow

Aspergillus niger, a mold commonly associated with Aspergillus flavus in damaged corn, interferes with the production of aflatoxin when grown with A. flavus on autoclaved corn. The pH of corn-meal disks was adjusted using NaOH-HCl, citric acid-sodium citrate, or a water extract of A. niger fermented corn. Aflatoxin formation was completely inhibited below pH 2.8-3.0, irrespective of the system ...

2002
FUNGAL INFECTIONS

ASPERGILLUS. Infections with aspergillus, a fungal organism, are seen in the ear canal where a common variety is aspergillus niger. Sinal infections are also caused by aspergillus and pulmonary infections by inhalation of the fungus. In the maxillary sinus there may be a ball of fungus called aspergilloma. If the infection invades blood vessels, any organ may become involved. Not all aspergillu...

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