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Now showing items 111-120 of 122
التحصيل اللغوي لدى تلاميذ المرحلة الإبتدائية
(
Qatar University
, 1990 , Article)
التحصيل اللغوي لدى تلاميذ المرحلة الابتدائية في المملكة العربية السعودية
( ملخص البحث )
من الملاحظ أن نسبة كبيرة من تلاميذ المرحلة الابتدائية يعانون من ضعف شديد في مادة اللغة العربية بفروعها ، وهذه النسبة من التلاميذ ...
Age Environmental Factors, Germination And Seedling Emergence Of Ocimum Basilicum L
(
Qatar University
, 1990 , Article)
Fresh and exhumed seeds of Ocimuni basilicum L. gave 100 % germination at 13/11-h alternating temperature of 20/10, 32/18, 38/24 and 40/32 °C but did not germinate at constant temperatures. Germination was prevented in the ...
الرياضة للمسنين
(
Qatar University
, 1990 , Article)
البيع بالتقسيط : نظرات في التطبيق العملي
(
Qatar University
, 1990 , Article)
Vertical Distribution And Inter-Relations Of Oxygen And Nutrients In The Arabian Gulf And The Gulf Of Oman In Summer
(
Qatar University
, 1990 , Article)
The distribution patterns of oxygen and nutrients (phosphate, nitrate, nitrite and ammonia) were studied along the Arabian shelf of the Arabian Gulf and the Gulf of Oman, including the Strait of Hormuz, during September, ...
Performance of Greenhouses in The Arabian Gulf
(
Qatar University
, 1990 , Article)
This work is devoted to the gaining of insight into the operation of environmentally controlled greenhouse in hot and humid climates. Field data inside and outside the greenhouse, namely: solar radiation, dry and wet bulb ...
Constituents of plants growing in Qatar - Part XIX. Flavonoids of Glossonema edule N. E. Br.
(
Springer Nature
, 1990 , Article)
The study of the flavonoids of the unripe fruits of Glossonema edule, resulted in the isolation and identification of apigenin 6,8-di-C-glucoside (violanthin) and luteolin 7-O-glucoside. © 1990 Kluwer Academic Publishers.
Constituents of plants growing in Qatar XVII anti-inflammatory and cytotoxic activities of extracts of thirty indigenous species
(
Taylor & Francis
, 1990 , Article)
Thirty plants, indigenous to Qatar, were extracted separately with hexane, chloroform and ethanol. The dried extracts were examined for potential anti-inflammatory activities both in vitro by their ability to inhibit ...
Guaianolides from Centaurea sinaica
(
Elsevier
, 1990 , Article & Report)
Three sesquiterpene lactones were isolated from the aerial parts of Centaurea sinaica: amberboin, chlorohyssopifolin A and sinaicin. The latter is reported for the first time.
Vegetation composition of a maritime salt marsh in Qatar in relation to edaphic features
(
Blackwell Publishing Ltd
, 1990 , Article)
Coverpercentage values for plant species were estimated using the line-intercept method along two belt transects starting at the lower mangrove frontier and ending at the upper height of the salt marsh. Twelve perennial ...