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Q. What is the cost-benefit relationship regarding sewage treatment as a strategy to fight water pollution?
To treat sewage is greatly cheaper for society. The non-treated sewage pollutes lakes, rivers and the sea being a cause of diseases transmitted through water. For the society the costs of these diseases are lot higher than the cost of the sewage treatment.
One of the major economical systems to treat sewage is the aerobic treatment system, reservoirs kept much oxygenated for aerobic bacteria to decompose organic material.
Q. What is the pH inside the stomach? Why is there a need to keep that pH level? How is it maintained? Which are the cells that produce that pH? The normal pH of the gastric ju
The fishes belong to class Pisces under vertebrates. 2. In fishes, the respiratory system consists of mouth, pharynx, internal branchial apertures, branchial pouches and external b
Q. What we need Undergloves? These are a cotton glove worn under the treatment glove for those operators experiencing discomfort to the skin on the hands. These must be replace
How Pathologic Conditions causing the underweight? Illness can affect weight status in a number of ways. For example, fevers and infections increase the demand for energy, whic
STIMULENT S - It makes a person more wakeful, alert and active. (i) Caffeine ( C 8 H 10 N 4 O 2 ) - It is 1,3,7-trimethylxanthine obtained from tea leaves ( Thea si
De Vega Annuloplasty : Classic De Vega annuloplasty is done using 2'0' double armed polyester suture with pledgets on either end. It starts with one of the needles passed fr
What is the photoperiodism? The Photoperiodism is the biological response presented by some living beings to their daily time of light exposure (photoperiod).
What is polygenic inheritance? How does it work? The Polygenic inheritance, also called as quantitative inheritance, is the gene interaction in which a given trait is conditio
Work Injuries Based On Type of Accidents Earlier we identified four kinds of injuries mainly based upon type of disability. This classification is needed for the purposes of c
FUNCTIONS (1 ) Cell secretion - Golgi body is concerned with secretion (export) of macromolecules. Secretion involves three steps:- (a) Golgi body receives the mat
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