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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
Air pollution is complex in origin and varied in effect. It is very crucial from the point of human health. Every human being inhales about 15-22 kg of air daily and air is pollute
Q. What is the pineal gland? The pineal gland also known as epiphysis or pineal body is situated centrally in the head. It secretes the hormone melatonin. A hormone produced at
Explain briefly about Foams Consider the following example. Take some liquid in a glass and agitate or shake it vigorously. What do you observe at the top of the liquid. Yes,
What are the trends of the gametophyte in the evolution of plants? A tendency of the gametophyte evolution in plants has been towards the formation of gametes that are independ
What is the difference between taeniasis and cysticercosis? Taeniasis is the parasitic disease caused by the adult tapeworm installed within the human intestine. Cysticercos
Dietary fibre Dietary fibre: Typhoid patient has an inflamed intestinal mucosa, which can be easily perforated and ulcerated leading to internal haemorrhage. Thus foods hig
Vegetative Development - Growth It is quantitative and irreversible change. It reflects an increase in size and volume of an organism. For example, the change in the size of a
Why Dairy or milk product are important for human body? This first food of mammals is rich in body-building proteins and bone-forming calcium, besides being the only source of
Explain HIV/AIDS HIV/AIDS is another example of chronic infections. Its existence was discovered recently in 1981. The spread of HIV infection is widespread and can pro
sanguivarous mode of feeding in annelida
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