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Protection Against Insect Bites
To minimize insect bites, travellers should wear light-colored, long-sleeved shirts, pants and socks. The most effective topical insect repellent is N, N-diethyl-m-toluamide (DEET). Sprayed on exposed skin, DEET repels mos- quitoes, ticks, chiggers, fleas, gnats and some flies. DEET is available in formulations of 5-40% and 100%. Higher concentrations do not improve efficacy, but usually protect longer; 30-35% DEET formulations are preferred by Medical Letter consultants. A long-acting DEET formulation originally developed for the US Armed Forces (US Army Extended Duration Topical Insect and Arthropod Repellent - EDTIAR) containing 25-33% DEET (Ultrathon) can provide protection for 6-12 hours
Why there is difference in the colour obtained for the dextrin solution (ammonium sulphate and dextrin )when brought to iodine test Respetively by first half saturation test and t
Explain about the cyclamate - artificial sweeteners? Another sweetener is cyclamate (sodium cyclohexylsulphamate). Have a look at its structure as shown in the figure. It is on
Technique: Careful re-opening of sternum and release of steinum from the underlying adhesion is done. Femoral artery and vein are exposed for going on femoro fenioral bypass
Composite Endosperm - Variants of Endosperm In the family Loranthaceae, the development of endosperm is unique. The ovary lacks ovules. The sporogenous tissue located at the b
Define Principle of colorimetric method-2, 4 dinitrophenylhydrazine? Ascorbic acid is oxidized to dehydro ascorbic acid by copper (Cu ++ ) ions. 2, 4 dinitrophenyl hydrazine re
Considering the hybridization in a given trait like the color of the hair of a mammalian species (white/black) conditioned by a pair of different alleles under complete dominance (
Explain Diagnosis of Root Perforation 1- Exploration: Continuous bleeding if the defect touched during cleaning and shaping lead to difficult vision. Difficult to d
Explain the Synthetic and natural materials of suturing 1. Most common are synthetic fibers: nylon, polyester, polyglactin (PG), and polyglycolic acid (PGA). 2. Natural: sil
Explain What is the optimum temperature for catalyses? Ans) For any chemical reaction, the reaction rate enhances with temperature, so the higher the temperature, the earlier t
What are coacervates? Coarcervates are small structures made of the aggregation of organic molecules under water solution. By electrical attraction the molecules join into bigg
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