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Featured researches published by Jun-Hyoung Kim.


Journal of Food Protection | 2006

Gamma radiation sensitivity of Enterobacter sakazakii in dehydrated powdered infant formula

Jeong-Min Lee; Se-Wook Oh; Jun-Hyoung Kim; Hong-Sun Yook; Myung-Woo Byun

The observed Enterobacter sakazakii D10-values for tryptic soy broth and dehydrated powdered infant formula were 0.27 +/- 0.05 and 0.76 +/- 0.08 kGy, respectively. A decrease of approximately 3 log in the dehydrated powdered infant formula was obtained by irradiation with 3.0 kGy or rehydration with hot water at 80 degrees C. No recoverable bacteria were found in the powdered infant formula irradiated at 5.0 kGy and stored, either before or after rehydration. A radiation dose of up to 5.0 kGy had no marked effect on the sensory properties of the dehydrated powdered infant formula after rehydration and heating. Gamma radiation could potentially be used to inactivate E. sakazakii in dehydrated powdered infant formula; however, nutritional studies need to be conducted before the use of radiation can be recommended.


Journal of Food Protection | 2004

Analysis of Radiolytic Products of Lipid in Irradiated Dried Squids (Todarodes pacificus)

Jun-Hyoung Kim; Hye-Young Seo; Kyong Su Kim

The lipid portion of dried squids (Todarodes pacificus) was extracted, and its hydrocarbons and 2-alkylcyclobutanones were separated using a florisil column. Both compounds were identified by gas chromatography and mass spectrometry and used to investigate the production of radiation-induced hydrocarbons and 2-alkylcyclobutanones. Concentrations of the hydrocarbons and 2-alkylcyclobutanones increased linearly with the radiation dosage. The major hydrocarbons in the irradiated dried squids were pentadecane and 1-tetradecene, which originated from palmitic acid. The amount of pentadecane was the highest among the radiation-induced hydrocarbons in the dried squids. The major 2-alkylcyclobutanone in the irradiated dried squids was 2-dodecylcyclobutanone, which was formed from the large amount of palmitic acid. 2-Tetradecylcyclobutanone, which may be produced from stearic acid in sample lipids, was also detected. Radiation-induced hydrocarbons and 2-alkylcyclobutanones were detected at > or = 0.5 kGy. These compounds were not detected in dried squids that were not irradiated. Radiation-induced hydrocarbons can be used as a detection marker for irradiated dried squids; however, the amount of 2-alkylcyclobutanones produced was not enough to be used as a marker. Radiolytic products of lipids, such as hydrocarbons or 2-alkylcyclobutanones. can be used to monitor food safety for consumers, ensuring proper irradiation labeling in foods and quarantine treatment in international trade.


Radiation Physics and Chemistry | 2007

Effects of gamma irradiation on the yields of volatile extracts of Angelica gigas Nakai

Hye-Young Seo; Jun-Hyoung Kim; Hyun-Pa Song; Dong-Ho Kim; Myung-Woo Byun; Joog-Ho Kwon; Kyong Su Kim


Journal of Materials Science Letters | 1997

Measurement of thermal expansion coefficients by electronic speckle pattern interferometry at high temperature

Kuk-Se Kim; Jun-Hyoung Kim; Jinyi Lee; Soon-Suck Jarng


Journal of The Korean Society of Food Science and Nutrition | 2007

Studies on the Manufacturing of Sujeonggwa (Korean Traditional Cinnamon Flavored Persimmon Punch) Edible in Severe Environment by Gamma Irradiation

Jong-Dae Park; Ju Woon Lee; Jun-Hyoung Kim; Kyong Su Kim; K.J. Han; Sul; Hye-Sung Lee


Journal of Food Protection | 2004

Analysis of radiation-induced hydrocarbons and 2-alkylcyclobutanones from dried shrimps (Penaeus aztecus).

Kyong Su Kim; Hye-Young Seo; Jeong-Min Lee; Eun-Ryong Park; Jun-Hyoung Kim; Cheul-Hee Hong; Myung-Woo Byun


Radiation Physics and Chemistry | 2004

Radiolytic products of irradiated authentic fatty acids and triacylglycerides

Kyong Su Kim; Jeong-Min Lee; Hye-Young Seo; Jun-Hyoung Kim; Hyun-Pa Song; Myung-Woo Byun; Joong-Ho Kwon


Journal of Food Science and Nutrition | 2006

Essential Oil Constituents of Swertia chirata Buch.-Ham.

Rajendra Gyawali; Keun-Young Ryu; Sung-Lye Shim; Jun-Hyoung Kim; Hye-Young Seo; Kyu-Jae Han; Kyong Su Kim


Journal of The Korean Society of Food Science and Nutrition | 2005

Changes of Volatile Odor Components in Onion by Freeze-drying

Jun-Hyoung Kim; H.Y. Seo; Ki-Mi No; Byung-Jae Han; Sung-Jin Lee; Y.S. Seo


Journal of The Korean Society of Food Science and Nutrition | 2005

Effect of γ-Irradiation on the Volatile Organic Compounds from Leek (Allium tuberosum R.)

Byung-Jae Han; Sook-Young Yang; Jun-Hyoung Kim; Sung-Lye Shim; Gyawali Rajendra; Sung-Jin Lee; Kyong Su Kim

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Hyun-Pa Song

Chungnam National University

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Dong-Ho Kim

Seoul National University

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Hong-Sun Yook

Chungnam National University

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Hye-Sung Lee

Kyungpook National University

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