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Chung, Doohyun,Cho, Tae Jin,Rhee, Min Suk Elsevier 2018 Food Research International Vol.107 No.-
<P>Despite the widespread belief that citrus fruit extracts (CFEs) are microbiologically safe due to their acidity, limited bactericidal effect results in low applicability as antibacterial agent and outbreaks occurred by acid-adapted pathogens. Here, we examined the antibacterial effects of CFEs [lime (Citrus medica), lemon (Citrus limon), calamansi (Citrus microcarpa)] combined with essential oil components (EOCs; carvacrol and thymol) against non-acid-adapted/acid-adapted Escherichia coli 0157:H7, Salmonella Typhimurium, and Listeria monocytogenes under 22 degrees C for 5 min. CFEs (< 20%) alone or small amounts of EOCs (2.0 mM; 0.032%) alone could not inactivate the target bacteria effectively. However, combined treatments exhibited marked synergy: CFE + EOCs eliminated all the bacteria (> 6.9 log CFU/ml). Among the CFEs tested, the highest synergism was shown by calamansi, an exotic citrus fruit previously unrecognized as an antibacterial agent. Although acid-adaptation improved bacterial survival, calamansi (< 20%) + EOCs (< 0.032%) completely inactivated even the most resistant pathogen (E. coli 0157:H7). Validation test also showed that all tested commercial juice products also eliminated acid -adapted pathogens when used with EOCs. Physicochemical analysis of tested CFEs (pH measurement and HPLC analysis of components) revealed that low pH and flavanone (hesperidin) did not contribute to the synergistic bactericidal effects. Rather, the high citric acid content is likely to contribute to the strong synergistic effect with EOCs by damaging susceptible bacterial membranes. Sensory scores for CFEs were not altered by addition of EOCs at concentrations up to 1.5 mM. This study provides new insight into the utility of CFEs with EOCs to improve not only the microbiological safety of food products containing CFEs but also their applicability as natural antibacterial complex.</P>
김두현(Doohyun Kim),황유진(Yujin Hwang),박재홍(Jae-Hong Park),정성일(Seong-Ir Chung),정영만(Young-Man Jeong),구본철(Bon-Cheol Ku),이재근(Jae-Keun Lee),안영철(Young-Chull Ahn),방선욱(Sunwook Bang),김석로(Seok-Ro Kim) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.6
The presence of non-condensable gases as an additional thermal resistance inside a refrigerating circuit has been found for a general refrigerator. The effect of non-condensable gases was varied by controlling the injection amount of dry air into the refrigerating circuit to increase a thermal resistance. Energy consumption tests for the refrigerator were conducted under the various amounts of non-condensable gases. The tested refrigerating circuit was the household refrigerator. As the molar fraction of non-condensable gases was increased from 0% to 1.46%, the amount of energy consumption was found to increase up to 25%. The increase of the amount of non-condensable gases in refrigerating circuit was found to result in increasing the condensation temperature at the condenser and decreasing the evaporation temperature at the evaporator, which were presumably caused by the low specific heat and increased partial pressure of non-condensable gas.
( Minji Kim ),( Kim Won-baek ),( Kyoung Yoon Koo ),( Bo Ram Kim ),( Doohyun Kim ),( Seoyoun Lee ),( Hong Joo Son ),( Dae Youn Hwang ),( Dong Seob Kim ),( Chung Yeoul Lee ),( Heeseob Lee ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.4
This study was conducted to evaluate the hyaluronidase (HAase) inhibition activity of Asparagus cochinchinesis (AC) extracts following fermentation by Weissella cibaria through response surface methodology. To optimize the HAase inhibition activity, a central composite design was introduced based on four variables: the concentration of AC extract (X<sub>1</sub>: 1-5%), amount of starter culture (X<sub>2</sub>: 1-5%), pH (X<sub>3</sub>: 4-8), and fermentation time (X<sub>4</sub>: 0-10 days). The experimental data were fitted to quadratic regression equations, the accuracy of the equations was analyzed by ANOVA, and the regression coefficients for the surface quadratic model of HAase inhibition activity in the fermented AC extract were estimated by the F test and the corresponding p values. The HAase inhibition activity indicated that fermentation time was most significant among the parameters within the conditions tested. To validate the model, two different conditions among those generated by the Design Expert program were selected. Under both conditions, predicted and experimental data agreed well. Moreover, the content of protodioscin (a well-known compound related to anti-inflammation activity) was elevated after fermentation of the AC extract at the optimized fermentation condition.
Shin, Sun Ah,Na, Hee Young,Choe, Ji Young,Chung, Doohyun,Park, Mira,Oh, Sohee,Kim, Ji Eun 대한병리학회 2018 Journal of Pathology and Translational Medicine Vol.52 No.6
<P><B>Background</B></P><P>The up-regulation of the lipogenic pathway has been reported in many types of malignant tumors. However, its pathogenic role or clinical significance is not fully understood. The objective of this study was to examine the expression levels of adipophilin and related hypoxic signaling proteins and to determine their prognostic impacts and associations with the pathologic characteristics of lung adenocarcinoma.</P><P><B>Methods</B></P><P>Expression levels of adipophilin, heat shock protein 27 (HSP27), carbonic anhydrase IX, and hypoxia-inducible factor 1α were examined by immunohistochemical staining using tissue microarray blocks. Correlations between protein expression levels and various clinicopathologic features were analyzed.</P><P><B>Results</B></P><P>A total of 230 cases of primary adenocarcinoma of the lung were enrolled in this study. Adipophilin expression was more frequent in males and with the solid histologic type. It was correlated with HSP27 expression. Patients with adipophilin-positive adenocarcinoma showed a shorter progression-free survival (PFS) (median PFS, 17.2 months vs 18.4 months) in a univariable survival analysis, whereas HSP27 positivity correlated with favorable overall survival (OS) and PFS. In a multivariable analysis, adipophilin and HSP27 were independent prognostic markers of both OS and PFS.</P><P><B>Conclusions</B></P><P>Activated lipid metabolism and the hypoxic signaling pathway might play a major role in the progression of lung adenocarcinoma, especially in the solid histologic type.</P>