/ Post a Reply
Post a Reply
Thread: Prawns + Vitamin C=Poison?
(You can post as a member (
first) or a guest!)
(100 characters at most)
Content: ( 3,000 characters at most, please )
You can add emoticons below to your post by clicking them.
[quote=GUEST74135,356570]Marine organisms normally contain arsenic residues ranging from < 1 to more than 100 mg/kg, predominantly as organic arsenic species such as arsenosugars (macroalgae) and arsenobetaine (invertebrates and fish). Bioaccumulation of organic arsenic compounds, after their biogenesis from inorganic forms, occurs in aquatic organisms. Bioconcentration factors (BCFs) in freshwater invertebrates and fish for arsenic compounds are lower than for marine organisms. Biomagnification in aquatic food chains has not been observed. Background arsenic concentrations in freshwater and terrestrial biota are usually less than 1 mg/kg (fresh weight). With the exception of fish, most foods contain less than 0.25 µg/g arsenic. Many species of fish contain between 1 and 10 g/g. Arsenic levels at or above 100 µg/g have been found in bottom feeders and shellfish. Both lipid- and water-soluble organoarsenic compounds have been found but the water-soluble forms constitute the larger portion of the total arsenic content. The nature of these compounds has been shown to be mainly of the quaternary arsonium type. As was mentioned above, arsenobetaine is believed to be the most predominant species, but recent Canadian results demonstrated a higher level of arsenocholine than arsenobetaine in shrimps (Lau et al., 1987; Friberg et al., 1986; WHO, 1981; Ministry of Agriculture, Fisheries and Food, 1982; Dabeka et al.,. ....http://www.inchem.org/documents/ehc/ehc/ehc224.htm Although there is no compelling evidence that vitamin C has antitumor activity in humans, clinical trials are testing the hypothesis that ascorbic acid (AA) will enhance the efficacy of arsenic trioxide (As2O3) in myeloma.. ..... http://biblioteca.universia.net/html_bura/ficha/params/id/27134149.html [/quote]
Get a new code
About Us & Contact Us
Copyright © 1998-2020 All rights reserved.