secondary contamination
31Barasat — Infobox Indian Jurisdiction native name=Barasat latd= 22.72|longd= 88.48 state name=West Bengal district=North 24 Parganas leader title 1=Municipality Chairman leader name 1=Pradip Chakrabarty [ [http://north24parganas.nic.in/municipality.html… …
32Chemetco — Former type Private Industry Recycling Fate Bankruptcy Founded Illinois, United States June 9, 1969 (1969 06 09) …
33West Bengal — Infobox Indian Jurisdiction type = state state name = West Bengal native name = West Bengal capital = Kolkata latd = 22.5697 longd = 88.3697 largest city = Kolkata (Calcutta) abbreviation = IN WB official languages = Bengali legislature type =… …
34Pesticide — A cropduster spraying pesticide on a field Pesticides are substances or mixture of substances intended for preventing, destroying, repelling or mitigating any pest.[1] A pesticide may be a chemical unicycle, biological agent (such as a virus or… …
35Polymerase chain reaction optimization — The polymerase chain reaction (PCR) is a commonly used molecular biology tool for amplifying DNA, and various techniques for PCR optimization have been developed by molecular biologists to improve PCR performance and minimize failure. Contents 1… …
36Background radiation — This article is about ionizing radiation. For microwave background radiation from space, see Cosmic background radiation and cosmic background. Thermal radiation emitted by Earth is not considered in this category because it is not ionizing.… …
37Bangladesh — This article is about the People s Republic of Bangladesh. For other uses, see Bangladesh (disambiguation). Coordinates: 23°N 90°E / 23°N 90°E …
38Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …
39The Keys to the Kingdom — Not to be confused with The Keys of the Kingdom. The Keys to the Kingdom Scholastic Inc. Covers for Mister Monday, Grim Tuesday, Drowned Wednesday and Sir Thursday …
40Obsessive-compulsive disorder — (OCD) is a chronic anxiety disorder most commonly characterized by obsessive, distressing, intrusive thoughts and related compulsions. Compulsions are tasks or rituals which attempt to neutralize the obsessions. OCD is distinguished from other… …
