up flow anaerobic sludge blanket (uasb) treatment has proved its efficiency among other treatment methods especially for hardly degradable wastewaters such as industrial wastewaters and leachate. uasb is a widely used reactor with a resistance biomass. waste landfills' leachate is one of the most polluted wastewaters which cause great concerns due to landfill implementations for municipal ...

−The inhibition of methane production in the continuous anaerobic degradation process for the treatment of sewage sludge containing sulfate was investigated. Also, the competition between sulfate-reducing bacteria (SRB) and methane-producing bacteria (MPB) with COD/sulfate ratio was explained in terms of electron flow. The methane production rate was 0.07, 0.13, 0.24, 0.31 and 0.33 l-CH4 g-COD ...

OBJECTIVE The impact of anaerobic growth conditions on the Staphylococcus aureus toxic shock syndrome toxin-1 (TSST-1) production was studied. METHODS Ten strains of S. aureus derived from patients with toxic shock syndrome (TSS), 10 isolates of S. aureus, and documented TSST-1-producing strains recovered from patients with either staphylococcal septicemia or staphylococcal nongenital abscess...

In a new method of anaerobic culture, a transparent, gas-impermeable bag is used and the anaerobic environment is established with copper sulfate-saturated steel wool. An Alka-Seltzer tablet generates carbon dioxide. The agar plate surface can be inspected through the bag at any time without interrupting the anaerobic atmosphere or disturbing other specimens. Methylene blue indicator strips are...

A method fbr high-perfbrmance liquid chromatography (HPLC) has been estahlished fbr the simultaneous determination of rheinanthrone, sennidin A, scnnidin B and rhein formed by incubation f sennoside A with rat and mouse feces. The analysis was done within 20 min with a Wakosil-II5C18HG column by linear gradient elution using a mobile phase containing aqucous phosphoric acid and acetonitrile. Rh...

I. Rumen liquor from calves 3-5 weeks old, and a supernatant fraction prepared by centrifugation from rumen fluid of older calves showed an increase in octadecadienoic acid during aerobic incubation, but not during incubation. under strictly anaerobic conditions. 2. The lipoxygcnase test revealed the presence of the cis,cis-~,~+-pentadiene system in the product formed on incubation, whereas oxi...

BACKGROUND For economical bioethanol production from lignocellulosic materials, the major technical challenges to lower the production cost are as follows: (1) The microorganism should use efficiently all glucose and xylose in the lignocellulose hydrolysate. (2) The microorganism should have high tolerance to the inhibitors present in the lignocellulose hydrolysate. The aim of the present work ...

The question was asked whether the insensitivity to dihydrostreptomycin and streptomycin exhibited by facultatively anaerobic organisms growing strictly anaerobically could be due entirely to the lack of an anaerobic mechanism for the uptake of these antibiotics. A technique is described here which allows exposure of Escherichia coli B to dihydrostreptomycin, under conditions which are known to...

Objective: Infection control is one of the important aspects in dentistry. Oral and maxillofacial surgery is one of the most sensitive fields in dentistry in which infection control is important a sterile surgical set is imperative. Manufacturers only guarantee the sterility of the anesthetic not the sterility of its outer surface. They recommend alcohol to sterile the outer surface (especially...