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Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, sometimes called a red tide in marine environments, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to ...
Anatoxin-a is an agonist of both neuronal α 4 β 2 and α 4 nicotinic acetylcholine receptors present in the CNS as well as the (α 1) 2 βγδ muscle-type nAchRs that are present at the neuromuscular junction. [1] (Anatoxin-a has an affinity for these muscle-type receptors that is about 20 times greater than that of acetylcholine. [2])
This is the list of Schedule II controlled substances in the United States as defined by the Controlled Substances Act. [1] The following findings are required, by section 202 of that Act, for substances to be placed in this schedule:
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In a typical procedure, equal volumes of an 8.1% (w/v) solution of potassium ferricyanide and a 20% solution of ferric ammonium citrate are mixed. The overall contrast of the sensitizer solution can be increased with the addition of approximately 6 drops of 1% ( w/v ) solution potassium dichromate for every 2 ml of sensitizer solution.
Johnson wrote about her experience of the service in her 1986 book Making Waves: A Woman in This Man's Navy.She later transferred to the U.S. Marine Corps OCS. Johnson wrote a book about her experience in the USMC, detailing the sexual harassment that she identifies as the primary reason she left the military, but was unable to find a publisher for that book in the 1980s.
The American Conference of Governmental Industrial Hygienists has a recommended Threshold Limit Value (TLV) for asbestos of 0.1 fibers/mL over an 8-hour shift. OSHA in the United States and occupational health and safety regulatory jurisdictions in Canada use 0.1 fibers/mL over an 8-hour shift as their exposure limits. [19]
The UN numbers range from UN0001 to about UN3600 and are assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods. UN 0001 to 0600 [ edit ]