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Tae Haeng Cho(趙太行),Jonghoo Cho(趙鍾厚) 한국예방수의학회 1978 예방수의학회지 Vol.2 No.1
Contamination of fluorescent bleaching agents in paper caps for milk bottle and various kinds of orginal paper tissue used for paper caps were examined by ultraviolet ray irradiation method, and also the possibilities of elution into milk and various kiqds of water tested. The results obtained were summarized as follows. 1. Fluorescent bleaching agents could not be detected. in paper caps newly developed since July, 1977. 2. Such original materials used for paper caps as rosin side, talc and aluminum sulfate rosin side only contained 1 mg fluorescent bleaching agent per ml. 3. Fluorescent bleaching agents were detected in typing paper, rough paper, reclaimed paper for toilet and paper box, while these could not be detected in filter paper, reference card paper and coping paper. 4. Fluorescent bleaching agents infiltrated in paper caps were not extracted in milk and various kinds of water.
Kwang Soon Shin(申光淳),Jonghoo Cho(趙鍾厚),Sok Namkung(南宮錫),Dae Woo Whang(黃大羽) 한국예방수의학회 1979 예방수의학회지 Vol.3 No.1
Residual nitrite content of ham and sausage during storage for various lengths of time were estimated. The results obtained were summerized as follows. 1. Residual nitrite levels of ham and sausage during refrigerated storage(storage temperature 5℃) were rapidly decreased by first storage day 8 but showed a significant increase by storage day 20 again and these products maintained these increased low levels for about 1 week. After storage day 26 all products showed decreasing residual nitrite levels by storage day 30. 2. Ham and sausage showed more rapid rates of decrease in residual nitrite during room temperature storage (30℃) than refrigerated storage, especially during the first 4 days of storage, and then ham had these low levels of residual nitrite for about 20 days of storage while sausage maintained these low levels for about 10 days. After storage days of these low levels of residual nitrite all products tested showed the trends of gradually increasing residual nitrite by the last of storage period 30 days.