For both the marine and freshwater risk assessments, acute LC50 values were converted to chronic values using an acute to chronic ratio (ACR) of 2 (normally an ACR of 10 is used; however, because manganese is an essential element, a factor of 2 was used following ANZECC/ARMCANZ  guidelines). Both these extrapolated acute values and chronic EC50s were then converted to chronic NOECs by applying a factor of 5, according to ANZECC/ARMCANZ (2000) guidelines. In other words, each acute LC50 was divided by 10 (i.e., 2 × 5) and each algal EC50 value (regarded as chronic) was divided by 5 prior to the species sensitivity distribution being undertaken. It would be better to use experimentally derived acute to chronic conversion factors, but these were not available for manganese.
Alga () A kind of seaweed; pl. the class of cellular cryptogamic plants which includes the black, red, and green seaweeds, as kelp, dulse, sea lettuce, also marine and fresh water confervae, etc.
Aromatization () The act of impregnating or secting with aroma.
(1987) Acute and chronic toxicity to marine biota of widely used dispersants, PCBs, chlorinated pesticides and their combinations and their biomagnification in Alexandria region , Athens,Mediterranean Action Plan, United Nations Environment Programme/Foodand Agriculture Organization of the United Nations, pp.
DDT and its derivatives: environmental aspects (EHC 83, …
Algarovilla () The agglutinated seeds and husks of the legumes of a South American tree (Inga Marthae). It is valuable for tanning leather, and as a dye.
Geology field guide to the Torquay area, Devon
Algaroth () A term used for the Powder of Algaroth, a white powder which is a compound of trichloride and trioxide of antimony. It was formerly used in medicine as an emetic, purgative, and diaphoretic.
Mathematical and Natural Sciences
Albicore () A name applied to several large fishes of the Mackerel family, esp. Orcynus alalonga. One species (Orcynus thynnus), common in the Mediterranean and Atlantic, is called in New England the horse mackerel; the tunny.
Volcanoes and volcanology | Geology
Remoudaki E, Bergametti G, Losno R (1991) On the dynamic of the atmospheric input of copper and manganese into the western Mediterranean Sea. , 25A(3–4):733–744.
Full text of "NEW" - Internet Archive
Amalgamation () The act or operation of compounding mercury with another metal; -- applied particularly to the process of separating gold and silver from their ores by mixing them with mercury.