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안영태 ( Y. T. Ahn ),최연철 ( Y. C. Choi ) 한국항공운항학회 2009 한국항공운항학회지 Vol.17 No.1
Because of globalization, flight trips are generalizing, however in proportion to this, it is increasing that people who afraid of riding an airplane because of flight phobia. `Flight Phobia` is individual problem; however it can be factors to suspend of flight schedules. This research is experimental analyzed the recognition degree of flight attendants and cabin attendants about flight phobia and suggested the direction of management about related problems. This research examines meanwhile overlooked importance of flight phobia and the actual condition and if problems are happened, this research will be used valuable to manage quickly and safely.
한국 성인의 분과 유제품에서 발견된 젖산균의 복합담즙산염 분해에 관한 연구
안영태,김현욱 한국축산학회 1999 한국축산학회지 Vol.41 No.2
Bile salt deconjugation of one hundred-thirty lactic acid bacterial isolates from human feces, fermented milk products, and probiotic capsules was investigated on MRS media containing oxgall, bile extract(porcine), bile (bovine), TCA(taurocholic acid), TCDCA(taurochenodeoxycholic acid), TDCA(taurodeoxycholic acid), GCA (glycocholic acid), GCDCA(glycochenodeoxycholic acid), and GDCA(glycodeoxycholic acid). Lactobacillus fermentum, L. brnvis, L. plantarum, and Lactococcus lactis ssp. lactis had higher deconjugation activity of bile salts than L. acidophilus strains. When bile salts were deconjugated, halos of precipitate around colonies or opaque granular white colonies appeared on MRS agar containing bile salts. Opaque granular white colonies were formed when TDCA and GDCA were deconjugated. No or weak deconjugation activity was found under aerobic conditions. Fifty-three lactic acid bacterial isolates from human feces and thirteen isolates from fermented milk products or probiotic capsules were found to have high deconjugation activity of bile salts. When deconjugation of bile salts by selected lactic acid bacteria was tested on taurine- and glycine-conjugated bile acids, L. acidophilus FMP 0101 and L. axidophilus HF 0404 deconjugated all the conjugated bile acids tested except for GCDCA and GDCA, and these two strains deconjugated more taurine- than glycine-conjugated bile acid. E. faecium HP 0201 isolated from commercial probiotic capsules had the highest deconjugation activity among the examined bacterial isolates. Optimum pH for the bile salt hydrolase of the two L. acidophilus strains appeared to be pH 5.0-5.4 and the bile salt hydrolase activity of both L. acidophilus strains from human feces was higher inside the cell than in the supernatant without bile extract. When bile extract was added to the media, the enzyme activity of L. acidophilus HF 0401 was high both inside the cell and in the supernatant, but L. acidophilus HF 0404 exhibited higher enzyme activity in the supernatant than inside the cell.