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Ultrastructure of two genus Przhevalskiana silenus, brauer, 1858 and Cochliomyia hominivorax, coqueral, 1858 which affects goats by myasis in Saudi Arabia
2011
Aljubran, S.A. | Alsaqabi, S.M.
Ultrastructure study revealed two types of fly larvae Pizhevalskiana silenus (Brauer,1858) and Cochliomyia hominivorax (Coquerel, 1858) that causes myasis in Goats in Saudi Arabia, The study recorded that the exact composition of these two genus showed differences in morphological characteristics, which cannot be identified using an optical microscope. All previous studies recorded on the same region never before carried out ultrastracture studied.
Показать больше [+] Меньше [-]An Econometric model of the Egyptian cotton market and expectations of future in the light of economic variables on the world cotton market
2011
Gowily, W.A.A. | Rehan, M.K. | Abd-El-Maksoud, A.M.
The study showed that the average amount of global production of cotton during the period (2004-2008) was estimated at 20.849 million tons. Where China, United States of America and India in the front of producing countries and was the relative importance of the Egyptian production of cotton for the world in tenth place. The harvested area it may an annual average of about 33.205 million hectares during the same period. Where India, United States of America and China in the front of those countries, while the average quantity of world exports during the same period was estimated at 8.293 million tons / year. Where United States of America, Uzbekistan and India in the front of those countries, were ranked Egypt in the ninth position. while the imports it may average annual rate during the same period was estimated at 7.76 million tons / year. Where China, Turkey and Indonesia in the front of those countries, The world Stock comes China United States of America and India in the front of those countries during the same period, while the consumption of cotton, it may average annual rate during the same period was estimated at 21.15 million tons / year. Where China, India and Pakistan in the front of those countries. There is also a decrease in the area of the Extra long staple cotton in Egypt by 6040 feddan per year during the period (1990-2008). The area of long-staple cotton, there is a decrease up to 18190 feddan annually during the same period, while the production of Extra long staple cotton there are decline 6620 tons annually, while the production of long staple cotton there is a decline of 13,250 tons annually during the same period. With regard to the evolution of the total production costs of cotton in Egypt, there are increasing by 113.14 pounds / feddan per year as well as prices of farm cotton in Egypt, there are increasing by 170.95 pounds / tc5ns every year either total return for Egyptian cotton, there is increased total 173.34 pounds / feddan per year during the same period, The net return of cotton feddan to the study, noted the relative stability, and that it ranges around the arithmetic mean during the study period. Looks at the future of cotton in the world by forecasting its progress during the period (2009-2018), the direction of the Beginning stock to decline during the same period, while that the harvested area and end stock consumption relatively stable during the same Period, while exports and imports tended to increase during the same period, As for the forecasting of the Egyptian market during the same period the harvested area has tended to decline while increasing domestic consumption and with the relative stability in the beginning stock, as well as exports, Comparing the results to predict the global and Egyptian variables is showed Egyptian market for cotton towards the import of foreign cotton.
Показать больше [+] Меньше [-]Identification of the genetic relationship of almond seed wasp Eurytoma amygdali End in Mid and Southern of Syria
2011
Ghali, R.S. | Alkassis, W. | Lawand, S.
The almond seed wasp Eurytoma amygdali Enderlein (Eurytoma amygdale End) is an important insect on almonds Amygdalus sp in its plantig regions, causing a large loss in the production. The relationship between the adults of almond seed wasp in five regions: mid Syria (Homs), Southern region (Al Qunaitera, Swedaa), and the countryside of Damascus (Beet Tema,, Deer Ateah) was studied by ISSR. The results indicated that the females from Homs formed a separated cluster, and the females from Beet Tema and Deer Ateah were the most closed to each other,also the female from Al Qunaitera and Swedaa were closed to each other. It was noted that the males separated into two clusters, the first one contained the males from Homs and Swedaa, and the second contained the males from Beet Tema, Al Qunaitera and Deer Ateah.
Показать больше [+] Меньше [-]Zinc and manganese sorption behavior by natural zeolite and bentonite Полный текст
2011
Iskander, A.L. | Khald, E.M. | Sheta, A.S.
Zinc and manganese sorption behavior by natural zeolite and bentonite
2011
Iskander, A.L. | Khald, E.M. | Sheta, A.S.
Understanding the sorption process in natural zeolite and bentonite is necessary for effective utilization of these minerals as nutrient adsorbents and on the other side for controlling release of plant nutrients. This research was undertaken to characterize the ability of natural zeolite and bentonite minerals to adsorb and release zinc and manganese. The potentials for sorption of these ions were evaluated by applying the Langmuir and Freundlich equations. The results showed that Langmuir constant (maximum adsorption (b mmol kg-1)) of both Zn and Mn were for bentonite zeolite While the [binding strength values (k in L.mmol1 for zeolite bentonite Zn in case of zeolite showed the lowest desorbed percentage particularly at high levels of sorbed Zn. Only, 74.7 % is readily extractable by DTPA after three successive extractions leaving, 25.3 % Zn retained by the mineral. In case of bentonite, 82.26 % of sorbed Zn is readily extractable by DTPA after three successive extractions leaving, 17.74 % Zn retained by the mineral. In case of Mn, 84.63% of Mn sorbed by zeolite is readily extractable by DTPA after three successive extractions leaving, 15.37% Mn retained by the mineral. In case of bentonite, 89.79 % of adsorbed Mn is readily extractable by DTPA after three successive extractions leaving, 10.21 % Mn retained by the mineral. This finding may reflect clearly the possibility of using natural zeolite and bentonite as a slow release fertilizer for Zn and Mn and on the other hand preventing soil pollution with heavy metals.
Показать больше [+] Меньше [-]Zinc and manganese sorption behavior by natural zeolite and bentonite Полный текст
2011
A.L. Iskander | E.M. Khald | A.S. Sheta
Understanding the sorption process in natural zeolite and bentonite is necessary for effective utilization of these minerals as nutrient adsorbents and on the other side for controlling release of plant nutrients. This research was undertaken to characterize the ability of natural zeolite and bentonite minerals to adsorb and release zinc and manganese. The potentials for sorption of these ions were evaluated by applying the Langmuir and Freundlich equations. The results showed that Langmuir constant [maximum adsorption (b mmol kg−1)] of both Zn and Mn were for bentonite > zeolite. While the binding strength values (k in L mmol−1) for zeolite > bentonite. Zn in the case of zeolite showed the lowest desorbed percentage particularly at high levels of sorbed Zn. Only, 74.7% is readily extractable by DTPA after three successive extractions leaving, 25.3% Zn retained by the mineral. In the case of bentonite, 82.26% of sorbed Zn is readily extractable by DTPA after three successive extractions leaving, 17.74% Zn retained by the mineral. In the case of Mn, 84.63% of Mn sorbed by zeolite is readily extractable by DTPA after three successive extractions leaving, 15.37% Mn retained by the mineral. In the case of bentonite, 89.79% of adsorbed Mn is readily extractable by DTPA after three successive extractions leaving, 10.21% Mn retained by the mineral. This finding may reflect clearly the possibility of using natural zeolite and bentonite as slow release fertilizers for Zn and Mn and on the other hand preventing soil pollution with heavy metals.
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