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Atta, N. F., A. Galal, and R. A. Ahmed, "Voltammetric Behavior and Determination of Isoniazid Using PEDOT Electrode in Presence Of Surface Active Agents", Int. J. Electrochem. Sci. 6: 5097 - 5113 (2011) IF:2.808, vol. 6, pp. 5097-5113, 2011. AbstractCU-PDF.pdf

An electrochemical sensor was developed by using poly (3,4-ethylenedioxy thiophene) electrode in presence of different types of surfactants. Voltammetric behavior of isoniazid was studied at this electrode in the presence and absence of SDS and CTAB and interesting electrocatalytic effects were found. The presence of surfactant in the medium plays a key role in the electrostatic attraction and repulsion of isoniazid towards the polymeric surface in different pH values. The electrochemical behavior of isoniazid was investigated by cyclic voltammetry, linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). The linear response obtained for isoniazid was in the range of 0.1 to 8 ?mol L-1 and 10 to 100 ?mol L-1 with correlation coefficients of 0.999 and 0.998 and detection limits 32 nmol L-1 and 45 nmol L-1, respectively. The utility of this modified electrode was demonstrated for the determination of INH in human urine.

A.Tawfik, M.Wahba, H.Mansour, and T.Harko, "Viscous Quark-gluon Plasma in the Early Universe", Annalen der Physik, 2011. CU-PDF.pdf
Hegazy, A. K., L. Boulos, and K. H. F. O. S. Sharashy, "Vegetation and Species Altitudinal Distribution in Al-Jabal Al-Akhdar Landscape, Libya", P Acad Nat Sci Phila, 2011. Abstract

Cyrenaica is the largest phytogeographical region in Libya. The region holds Al-Jabal Al-Akhdar (the Green Mountain)landscape with the richest vegetation and highest species diversity in the country. Field study of the vegetation was carriedout in the different habitat types representing the mountainous landscape. Data were analyzed by Detrended Correspondence analysis (DCA) and Canonical Correspondence Analysis (CCA) against the environmental variables. Vegetation and speciesrichness varied with altitude from the sea level, through mid elevation slope vegetation in wadis, to herbaceous and lowshrub-vegetation towards the mountain top. Vegetation is classified into three major groups: (1) coastal and low altitudevegetation dominated by shrubs and trees which constitute about 60% of the plant life forms; (2) mid altitude and wadivegetation with the highest species richness and dominated by shrubs and trees which constitute over 60% of the plant lifeforms; and (3) mountain top vegetation dominated by herbs and few low shrubs constituting up to 90% of the plant lifeforms. The altitude, aspect and soil parameters do not explain the majority of variance in the obtained data which reveal thatother diverse local conditions and habitat types seem to be the main determinant of vegetation variation in Al-Jabal Al-Akhdar landscape.

El-Ghani, M. A. M., M. A. El-Kheir, M. Abdel-Dayem, and M. A. and El-Hamid, "Vegetation Analysis and Soil Characteristics of five Common Desert Climbing plants in Egypt", Turkish Journal of Botany, vol. 35, pp. 561-580, 2011. AbstractCU-PDF.pdf


El-Ghani, M. A. M., M. A. El-Kheir, M. Abdel-Dayem, and M. A. and El-Hamid, "Vegetation Analysis and Soil Characteristics of five Common Desert Climbing plants in Egypt", Turkish Journal of Botany, 2011. Abstract

This study aimed to characterise Egyptian desert vine flora and compare it with that of deserts in other continents, such as Australia and North America. Specifically, 5 common climbing desert plants (Citrullus colocynthis, Cocculus pendulus, Cucumis prophetarum, Pergularia tomentosa, and Periploca angustifolia) were selected for this study. The floristic composition, vegetation heterogeneity, and chorological affinities of the associated species of the studied climbing plants were quantitatively analysed.

Liu, X., A. A. M. El-Aty, and J. - H. Shim, "Various Extraction and Analytical Techniques for Isolation and Identification of Secondary Metabolites from Nigella Sativa Seeds", Mini-Reviews in Medicinal Chemistry, vol. 11, issue 11, pp. 947-55, 2011. AbstractCU-PDF.pdf

Nigella sativa L. (black cumin), commonly known as black seed, is a member of the Ranunculaceae family. This seed is used as a natural remedy in many Middle Eastern and Far Eastern countries. Extracts prepared from N. sativa have, for centuries, been used for medical purposes. Thus far, the organic compounds in N. sativa, including alkaloids, steroids, carbohydrates, flavonoids, fatty acids, etc. have been fairly well characterized. Herein, we summarize some new extraction techniques, including microwave assisted extraction (MAE) and supercritical extraction techniques (SFE), in addition to the classical method of hydrodistillation (HD), which have been employed for isolation and various analytical techniques used for the identification of secondary metabolites in black seed. We believe that some compounds contained in N. sativa remain to be identified, and that high-throughput screening could help to identify new compounds. A study addressing environmentally-friendly techniques that have minimal or no environmental effects is currently underway in our laboratory.

Noor, N. A., H. S. Mohammed, N. A. Ahmed, and N. M. Radwan, "Variations in Amino Acid Neurotransmitters in some Brain Areas of Adult and Young Male Albino Rats Due to Exposure to Mobile Phone Radiation", European Review for Medical and Pharmacological Sciences, vol. 15, pp. 729-742, 2011. AbstractCU-PDF.pdf

Background and Objectives: Mobile phone radiation and health concerns have been raised, especially following the enormous increase in the use of wireless mobile telephony throughout the world. The present study aims to investigate the effect of one hour daily exposure to electromagnetic radiation (EMR) with frequency of 900 Mz (SAR 1.165 w/kg, power density 0.02 mW/cm2) on the levels of amino acid neurotransmitters in the midbrain, cerebellum and medulla of adult and young male albino rats.

Elnagdy, S., M. E. N. Majerus, and L. L. - J. Handley, "The value of an egg: resource reallocation in ladybirds (Coleoptera:Coccinellidae) infected with male-killing bacteria", Journal of Evolutionary Biology, vol. 24, issue 10, pp. 2164-72, 2011. AbstractCU-PDF.pdf

Male-killing bacteria are thought to persist in host populations by vertical transmission and conferring direct and ? or indirect fitness benefits to their hosts. Here, we test the role of indirect fitness benefits accrued from resource reallocation in species that engage in sibling egg cannibalism. We found that a single-egg meal significantly increased larval survival in 12 ladybird species, but the value of an egg (to survival) differed substantially between species. Next, we tested the impact of three male-killing bacteria on larval survival in one ladybird species, Adalia bipunctata. Spiroplasma reduced larval survival, whereas Wolbachia and Rickettsia had no effect. However, Spiroplasma-infected larvae showed the greatest response to a single-egg meal.