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TZID:Europe/Berlin
TZUNTIL:20260329T010000Z
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DTSTART:20231029T030000
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RDATE:20241027T030000
RDATE:20251026T030000
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BEGIN:VEVENT
UID:www.bayceer.uni-bayreuth.de-bayceer-t170580id
DTSTAMP:20260804T161933Z
DESCRIPTION:Arsenic (As) is a ubiquitously present environmental pollutant 
 that negatively affects the health of plants\, animals\, and humans. It is
  one of ten &ldquo\;chemicals of major public health concern&rdquo\; accor
 ding to the WHO. Globally around 200 million people are threatened by expo
 sure to potentially toxic levels of As. Both natural and anthropogenic pro
 cesses release As into groundwater and soils. Chronic human exposure occur
 s predominantly via drinking water and the consumption of rice (Oryza sati
 va)\, which is far more likely than other crops to accumulate As in edible
  organs.\nSeveral forms of As exist in soils depending mostly on redox con
 ditions and microbial activities. Recently we discovered that among the As
  species in rice paddy soil pore water are inorganic and organic thioarsen
 ates. They had escaped detection by routine analytical methods. Thioarsena
 tes are taken up by plants\, are mobile within plants and can accumulate e
 ven in grains. One As species in particular\, dimethylmonothioarsenate\, r
 aises serious food safety concerns because of its known toxicity to human 
 and other mammalian cells. The talk will present the pathways of thioarsen
 ates from the soil into rice seeds\, covering geochemistry as well as mole
 cular plant physiology. Also\, we will discuss the implications of our fin
 dings for food safety and the regulation of tolerable As levels in rice.
DTSTART;TZID=Europe/Berlin:20240516T121500
DTEND;TZID=Europe/Berlin:20240516T134500
LOCATION:H6\, Geo
SUMMARY:Prof. Dr. Britta Planer-Friedrich & Prof. Dr. Stephan Clemens\, Env
 ironmental Geochemistry & Plant Physiology\, BayCEER (Homepage): Dimethyla
 ted thioarsenates: potentially dangerous hidden arsenic species in rice an
 d rice products
TRANSP:TRANSPARENT
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