http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Dae Woo Whang(黃大羽),Jong hoo Cho(趙鍾厚) 한국예방수의학회 1981 예방수의학회지 Vol.5 No.1
Psychrotrophic bacterial counts were determined on raw milk, market milk and sweetened milk, and the effects of ultrahigh temperature treatments on psychrotrophic counts of raw milk were studied. The results obtained were summarized as follows. 1) Mean psychrotrophic counts of raw milk were: summer (Jun.-Aug.), 10×10⁵; autumn (Sep.-Nov.), 8×10⁵; spring (Mar.-May), 4×10⁵; and winter (Dec.-Feb.) respectively. 2) Psychrotrophic bacteria were not detected immediately after ultrahigh temperature treatments at 135℃ for 2 sec. of raw milk. 3) Psychrotrophic colonies were produced in both market milk and sweetened milk, and significantly higher counts were found at sweetened milk than at white market milk.
牛乳의 Triphenyltetrazolium Chloride 還元試驗法에 對한 各種 化學物質의 影響
Dae Woo Whang(黃大羽),Jong hoo Cho(趙鍾厚) 한국예방수의학회 1978 예방수의학회지 Vol.2 No.1
Inhibitory effects of various chemical agents such as insecticides, antibacterial agents, antiseptics and synthetic soap against a bacterial Streptococcus thermophilus used to 2, 3, 5-triphenyltetrazolium chloride reduction test for the detection of residual antibotics in milk were tested. All the chemicals added in the higher concentration than the expected level into the milk have no effect on the growth of bacterial strain used to TTC reduction test.
축산식품(畜産食品)의 잔류농약(殘留農藥)에 관(關)한 연구(硏究) 제(第) 3 보(報) 우유(牛乳) 및 식육중(食肉中) 유기염소제(有機鹽素劑)의 잔류량조사(殘留量調査)
조태행,황대우,이문한,이원창,Cho, Tae Haeng,Whang, Dae Woo,Lee, Moon Han,Lee, Won Chang 대한수의학회 1977 大韓獸醫學會誌 Vol.17 No.2
During the period of March, 1976 to December, 1976, 48 raw milk samples were taken from dairy cows at 48 different dairy farms in Korea analyzed by gas liquid chromatography to determine the seasonal variation of the amount of organochlorine pesticide residues. At the same time 80 market milk, 10 beef and 10 pork samples were analyed by the same procedure for checking residual levels. The results were summarized as follows; 1. Milk samples from 17 dairy farms (36 per cent of tatal) were shown to be contaminated with various organochlorine pesticides. The residua lrate of ${\gamma}-BHC$ in tested samples were 44per cent (14 sam ples) that of aldrine was 28 per cent (9 samples) and those of pp'-DDT, dieldrin and heptachlor were 9.3 percent (3 samples) respectively. 2. In raw milk pp'-DDT, ${\gamma}-BHC$, aldrin, dieldrin and heptachlor were detected, and aldrin, dieldrin and heptachlor were detected in the market milk. Any kinds of organochlorine pesticides were not detected in beef samples but dieldrin and heptachlor were detected in pork samples. Average residual values of aldrin, dieldrin and heptachlor in the market milk were 0.0077 ppm (0.0000~1.1100 ppm), 0.0001ppm (0.0000~0.0500 ppm) and 0.0008 ppm (0.0000~2.0520 ppm), respectively, and those of dieldrin and heptachlor in pork samples were 0.0010 ppm (0.0000~0.0100 ppm) and 0.0033 ppm (0.0000~0.0330 ppm). respectively. 3. Residues of organochlorine pesticides in raw milk were extremely variable; in fact pp'-DDT was detected in milk samples from A, B, C and D districts and endrin was not detected from all districts. The ${\gamma}-BHC$ and dieldrin were detected at the district of A, C and D, aldrin at the districts of A and C and heptachlor at the districts of both A and D. 4. Seasonal trends of residual values of organochlorine pesticides were, in general, noticeable. The residual level was much higher in Spring than in other seasons and showed the tendeney of decrease from spring through summer and autumn generally; in the case of pp'-DDT average residual values were 0.0121 ppm in spring, 0.0022 ppm in summer and not detected in autumn. But in winter ${\gamma}-BHC$ and aldrin residues were increased a little. Residual values in raw milk (when cow are fed on hay and silage) were appeared higher in winter than the other seasons. 5. Residues of organochlorine pesticides in raw milk were not related in respect to hygienic conditions of dairy farms pp'-DDT and heptachlor were, in general, detected in all farms and aldrin was more detected in milk from well sanitated farms than poor sanitated ones.
Jong Hoo Cho(趙鍾厚),Sok Namkung(南宮錫),Dae Woo Whang(黃大羽) 한국예방수의학회 1979 예방수의학회지 Vol.3 No.2
Nitrite and nitrate nitrogen contents of total 27 samples of Pasture plants and roughages fed to cattle were analyzed to investigate the responsiblity for the unidentified causes of the sudden death of Korean cattle in mostly rural areas. In samples of produce analysed almost of all were very low in nitrite nitrogen contents but maize, sorghum and rice straw had comparatively high levels in the range 10.11 to 28.27ppm, while nitrate nitrogen contents were high levels in the range 32.82 to 586.76ppm on dry matter basis in general. Especially maize and rice straw which are main rough feeds for cattle in Korea had very higher contents of nitrate-nitrogen of about 580ppm on dry matter basis than those of other plants tested.
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.
Jong Hoo Cho(趙鍾厚),Sok Namkung(南宮錫),Kwang Soon Shin(申光淳),Dae Woo Whang(黃大羽) 한국예방수의학회 1979 예방수의학회지 Vol.3 No.2
80 milk samples taken from 8 different milk plants were analyzed for nitrite and nitrate nitrogen and the concentrations were usually very low level. Milk tested had comparatively high nitrate-nitrogen contents of average 5.01 ppm with the range 4.01 to 7.10 ppm but lower than 10ppm, upper limit of freshmilk. However some of individual milk tested contained above 7.10ppm and may represent a hazard if used as the sole source for infant food.