▁E BS CO ▁Information ▁Services ▁through ▁a ▁partners hip ▁with ▁Clar iv ate ▁Anal ytics . ▁ ▁Bi ological ▁Abstract s ▁consists ▁of ▁ 3 5 0 , 0 0 0 ▁references ▁for ▁almost ▁ 5 , 0 0 0 ▁primary ▁journal ▁and ▁mon ograph ▁titles . ▁Bi ological ▁Abstract s / R R M ▁addition ally ▁includes ▁more ▁than ▁ 2 0 0 , 0 0 0 ▁non - j ournal ▁cit ations . ▁ ▁Bi ological ▁Abstract s / R R M ▁is ▁the ▁former ▁Bio Res earch ▁Index . ▁ ▁Over view ▁Accept able ▁content ▁for ▁Web ▁of ▁Science ▁and ▁B IOS IS ▁pre views ▁is ▁determined ▁by ▁an ▁evaluation ▁and ▁selection ▁process ▁based ▁on ▁the ▁following ▁criteria : ▁impact , ▁influence , ▁tim el iness , ▁peer ▁review , ▁and ▁ge ographic ▁representation . ▁ ▁B IOS IS ▁Pre views ▁covers ▁ 5 , 0 0 0 ▁peer ▁review ed ▁journ als . ▁Non - j ournal ▁coverage ▁includes ▁coverage ▁of ▁meet ings , ▁meeting ▁abstract s , ▁con ferences , ▁literature ▁reviews , ▁U . S . ▁pat ents , ▁books , ▁software , ▁book ▁chap ters , ▁notes , ▁letters , ▁and ▁selected ▁reports ▁in ▁relevant ▁discipl ines ▁including ▁bot any , ▁micro bi ology , ▁and ▁ph arm ac ology . ▁B IOS IS ▁Pre views ▁contains ▁more ▁than ▁ 1 8 ▁million ▁records ; ▁more ▁than ▁ 5 0 0 , 0 0 0 ▁records ▁are ▁added ▁each ▁year , ▁and ▁back files ▁are ▁available