Biomaterial Database

Distribution of radioactive cesium ((134)Cs Plus(137)Cs) in a contaminated Japanese soybean cultivar during the preparation of tofu, natto, and nimame (Boiled Soybean). 2013

Mayumi Hachinohe, and Keitarou Kimura, and Yuji Kubo, and Katsuo Tanji, and Shioka Hamamatsu, and Shoji Hagiwara, and Daisuke Nei, and Hiromi Kameya, and Rikio Nakagawa, and Ushio Matsukura, and Setsuko Todoriki, and Shinichi Kawamoto

National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan.

We investigated the fate of radioactive cesium ((134)Cs plus (137)Cs) during the production of tofu, natto, and nimame (boiled soybean) from a contaminated Japanese soybean cultivar harvested in FY2011. Tofu, natto, and nimame were made from soybean grains containing radioactive cesium (240 to 340 Bq/kg [dry weight]), and the radioactive cesium in the processed soybean foods and in by-product fractions such as okara, broth, and waste water was measured with a germanium semiconductor detector. The processing factor is the ratio of radioactive cesium concentration of a product before and after processing. For tofu, natto, nimame, and for the by-product okara, processing factors were 0.12, 0.40, 0.20, and 0.18, respectively; this suggested that these three soybean foods and okara, used mainly as an animal feed, can be considered safe for human and animal consumption according to the standard limit for radioactive cesium of soybean grains. Furthermore, the ratio of radioactive cesium concentrations in the cotyledon, hypocotyl, and seed coat portions of the soybean grain was found to be approximately 1:1:0.4.

UI	MeSH Term	Description	Entries
D002588	Cesium Radioisotopes	Unstable isotopes of cesium that decay or disintegrate emitting radiation. Cs atoms with atomic weights of 123, 125-132, and 134-145 are radioactive cesium isotopes.	Radioisotopes, Cesium
D003257	Consumer Product Safety	The sum total of measures taken and regulatory policies enacted to ensure the safe use of consumer products.	Safety, Consumer Product,Product Approval,Product Approvals,Product Safety, Consumer
D005507	Food Contamination, Radioactive	Exposure of FOOD to radioactive substances, distinguishable from FOOD IRRADIATION, a food preservation technique.	Contamination, Radioactive Food,Radioactive Food Contamination
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000821	Animal Feed	Foodstuff used especially for domestic and laboratory animals, or livestock.	Fodder,Animal Feeds,Feed, Animal,Feeds, Animal,Fodders
D013025	Glycine max	An annual legume. The SEEDS of this plant are edible and used to produce a variety of SOY FOODS.	Soy Beans,Soybeans,Bean, Soy,Beans, Soy,Soy Bean,Soybean
D045730	Soy Foods	Foods made from GLYCINE MAX. Soy foods are high in DIETARY PROTEINS and PHYTOESTROGENS such as ISOFLAVONES.	Soy Sauce,Texturized Soy Protein,Tofu,Bean Curd, Soy,Miso,Natto,Soy Cheese,Tempeh,Texturized Vegetable Protein,Bean Curds, Soy,Cheese, Soy,Cheeses, Soy,Curd, Soy Bean,Curds, Soy Bean,Food, Soy,Foods, Soy,Protein, Texturized Soy,Protein, Texturized Vegetable,Proteins, Texturized Soy,Sauce, Soy,Soy Bean Curd,Soy Bean Curds,Soy Cheeses,Soy Food,Soy Protein, Texturized,Soy Proteins, Texturized,Texturized Soy Proteins,Vegetable Protein, Texturized,Vegetable Proteins, Texturized