Organisms when come in contact with substances like allergens through eyes, skin, nose, gastrointestinal tract, respiratory tract etc. and produce reactions, they are called allergic reactions. Allergens can be swallowed, injected or breathed into the lungs. Occurrence of allergic reactions is very common. They may happen soon after an organism comes in contact with an allergen. These reactions may be mild or could be severe, life threatening even. They may be limited to specific area of a body or they may affect the entire body. The severest form of an allergic reaction is termed as anaphylaxis or anaphylactic shock. A person having a family history of allergies is more prone to suffer from such reactions. An initial exposure may produce only a mild reaction. But, a repetition of such conditions can lead to more serious reactions. Once an individual is sensitized, i.e. has had an exposure or allergic reaction, even a small amount of allergen or a very limited exposure can trigger a severe reaction.
High-impact journals are those considered to be highly influential in their respective fields. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on July, 2014