Uptake of deuterium by dead leaves exposed to deuterated water vapor in a greenhouse at daytime and nighttime

Assimilation and transport of organic bound tritium in an irrigated pine forest

“…Non-living plant matter can also participate in tritium uptake via tritiated moisture and this is likely occurring at the MWMF forest. 38 Momoshima et al (2006) discovered that dried cedar needles participate in D2O uptake (D2O was used as a surrogate for HTO). 38 Although some details about the amount of surface area exposure for the live vs. dead leaf material are not provided, their work suggests that dead plant tissues are a potential tritium sink.…”

“…38 Momoshima et al (2006) discovered that dried cedar needles participate in D2O uptake (D2O was used as a surrogate for HTO). 38 Although some details about the amount of surface area exposure for the live vs. dead leaf material are not provided, their work suggests that dead plant tissues are a potential tritium sink. They note that the uptake and release of D2O was rapid relative to that of living tissue and attribute this behavior to a greater number of opened stoma in dead relative to living leaves.…”

A follow up of the decrease of non exchangeable organically bound tritium levels in the surroundings of a nuclear research center

“…Even if they are all dealing with OBT, a wide range of research themes was covered to better understand its uptake either under steady state conditions or after minute releases (Choi et al, 2005) as plants grown around nuclear facilities play an important role in the process of tritium transfer. Owing to the complexity of environmental metabolism, the investigations of tritium incorporation were divided into numerous themes including: the influence of HT releases (Amano et al, 1995), the formation and retention of tritium (deuterium could be used as analogue) at various growth stages, also taking into account the difference of metabolism between night and day (Atarashi-Andoh et al, 2002;Momoshima et al, 2006), its translocation to edible parts (Diabate and Strack, 1997). In addition, several papers also deal with modelling either to compare observed and predicted values (Davis et al, 2005;Keum et al, 2006;Ota et al, 2007) or for tritium dose estimates (DeVol and Powell, 2004;Hisamatsu et al, 1987;König, 1990).…”

Tritium concentration in soybean plants exposed to atmospheric HTO during nighttime and daytime

“…The existing studies mainly focus on the routine release and short atmospheric HTO exposure at daytime [4,[11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Little information is currently available regarding the tritium uptake and subsequent formation of organically bound tritium (OBT) in plants exposed to elevated levels of atmospheric tritium during the nighttime [24].…”