Search
Now showing items 1-10 of 77
Sem Studies On Facilitated Microbial Growth On Pac In A Biological Reactor
(
Qatar University
, 1996 , Article)
A process known as powdered activated carbon (PAC) treatment was applied to facilitate additional bacterial growth in the treatment of industrial wastewater. Refinery wastewater was fed into a pilot plant reactor at a rate ...
Studies On Plant Growth Regulators And Enzymes Production By Some Bacteria
(
Qatar University
, 1994 , Article)
Twenty four bacterial strains of thallobacteria belonging to genus Streptomyces were tested for their potentialities to produce plant growth regulators and some hydrolases in shake cultures. Seven strains namely; Streptomyces ...
Effect Of Culture Conditions On The Production Of Growth Regulators And Extracellular Enzymes By Streptomyces Olivaceoviridis
(
Qatar University
, 1996 , Article)
It was proposed to find out the optimum environmental conditions and nutritional requirements for highest growth regulating substance and enzyme production by Streptomyces olivaceoviridis. The optimum oc-amylase and ...
A study of nutrient dynamics in the coastal dunes of northwestern egypt.
(
Qatar University
, 1990 , Article)
Biomass and nutrient cycling are evaluated in sites of Ammophita arenaria and Onoaisvaginalis which are among the most common species growing on the coastal dunes of the western desert of Egypt. Both species accumulate N ...
Zinc Tolerance and Accumulation in Aspergillus oryzae Penicillium citrinum and Rhizopus stolonifer isolated from Saudi Arabian Soil
(
Qatar University
, 1997 , Article)
Aspergillus oryzae, Penicillium citrinum and Rhizopus stolonifer isolated from Taif soil, Saudi Arabia could survive in a liquid medium containing up to 500 ug/ml Zn. Aspergillus oryzae and Penicillium citrinum were more ...
Effect Of "Ethrel" On Colour Development And Juice Quality Of Sweet Oranges And Grapefruits
(
Qatar University
, 1994 , Article)
"Ethrel" was sprayed at 0,120, 420 and 480 ppm on sweet orange and grapefruit trees at fruit maturity stage to improve colouring and juice quality. Changes in fruit colour were observed in both varieties but the results ...
Towards a prospective transplantation of the local mangrove avicennia marina (forssk.) Vierh. Growing on coast of qatar i. Ecophysiological performance of juveniles.
(
Qatar University
, 1990 , Article)
A population sample of propagules was collected at random from average size A. marina trees growing at "Dhakhira" (Qatar). This sample was then divided into subsamples which were used to detect the effects of light intensity, ...
Additions to the flora of Qatar
(
Qatar University
, 1997 , Article)
Collections and earlier studies on the plants of Qatar are limited and of recent origin — since the seventies. The latest of these in 1983 (El Amin) listed 300 species belonging to 202 genera in 56 families. At present, a ...
Contribution of the Fungal Flora and Mycotoxins of Some Canned Tomato Paste Samples
(
Qatar University
, 1994 , Article)
Twenty-two species belonging to seven genera were isolated and identified from 21 tomato paste samples on glucose-Czapek's (5 genera and 14 species) and 10% NaCl-glucose-Czapek's (6 genera and 17 species) agar media, at ...
Mineral analysis of soil, euphorbia hirta l. And mycoflora from the industrial Yanbu City, Saudi Arabia
(
Qatar University
, 1995 , Article)
Soil and Euphorbia hirta L. samples were collected from five localities from the industrial Yanbu city Saudi Arabia, and analysed for their metal and fungal flora. Soil type is sandy, alkaline and contained low percentage ...