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RISS 인기검색어
- 검색키워드
- 저자 : Chun-Mei Gong (검색결과 4 건)
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Juan Bai,Chun-Mei Gong,Kang Chen,Hong-Mei Kang,Gang Wang 한국식물학회 2009 Journal of Plant Biology Vol.52 No.5
The aim of this study was to test the protective roles of superoxide dismutases (SODs), guaiacol peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) against oxidative damage and their activities in different phases of the dry down process in Reaumuria soongorica (Pall.) Maxim. leaves. Drought stress was imposed during 100 consecutive days and rewatering after 16, 72, and 100 days. The concentration of hydrogen peroxide (H2O2), malondialdehyde, and SODs activities were elevated significantly with progressing drought stress. POD and CAT activities increased markedly in the early phase of drought and decreased significantly with further drought stress continuation, and POD activity was unable to recover after rewatering. Ascorbate, reduced glutathione, APX, and GR activities declined in the initial stages of drought process, elevated significantly with further increasing water deficit progression and recovered after rewatering. These results indicate that: (1) iron SODsremoving superoxide anion is very effective during the whole drought stress; (2) CAT scavenges H2O2 in the early phase of drought and enzymes of ascorbate–glutathione cycle scavenge H2O2 in further increasing drought stress; and (3) POD does not contribute to protect against oxidative damage caused by H2O2 under drought stress.
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Xi-Wu Gong,Xiao-Qiong Wang,You-Rong Li,Chun-Mei Wu 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7
We present a novel coupled organic Rankine cycle (CORC) system driven by the low-grade waste heat, which couples a transcriticalorganic Rankine cycle with a subcritical organic Rankine cycle. Based on classical thermodynamic theory, a detailed performance analysison the novel CORC system was performed. The results show that the pressure ratio of the expander is decreased in the CORC and theselection of the working fluids becomes more flexible and abundant. With the increase of the pinch point temperature difference of theinternal heat exchanger, the net power output and thermal efficiency of the CORC all decrease. With the increase of the critical temperatureof the working fluid, the system performance of the CORC is improved. The net power output and thermal efficiency of the CORCwith isentropic working fluids are higher than those with dry working fluids.
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Ji-Chang Zhou,Yu-Mei Zhu,Zheng Chen,Shan He,Shi-jie Zheng,Jun-luan Mo,Xiao-Li Liu,Chun-mei Gong,Bin Hou,Hui Yang 한국유전학회 2015 Genes & Genomics Vol.37 No.5
Two single nucleotide polymorphisms (SNPs), rs2280788 (-28C[G) and rs2107538 (-403G[A), in the promoter region of chemokine (C–C motif) ligand 5 (CCL5) was reported to be involved in the immunoglobulin E (IgE) expression and IgE-mediated allergic reactions. This study was to investigate the characteristics of total serum IgE level, specific allergen sensitivities and the two SNPs in the allergic skin disease (ASD) patients. ASD patients visiting the dermatological outpatient department of a local hospital were included with certain criteria, and the fasting venous blood was sampled for analysis. Total serum IgE was assayed with an ELISA kit, and 14 kinds of allergen-specific IgE were tested with an allergen screening system. The polymerase chain reaction–restriction fragment length polymorphism method was used to analyze the two SNPs. Among the finally included 437 patients aged from 16 to 85 years, 68.2 % was positive for the total serum IgE, 49.2 % was positive for at least one of the assayed allergen-specific IgE, and 35.0 % was sensitive to house dust mite. In the SNPs analysis, the GG/(GA?AA) ratio and G/A ratio for the -403G[A locus in the male and/or female C45 years subgroup were significantly lower in the total serum IgE positive patients than in the negative patients (P\0.05). Weak linkage disequilibrium was found between -403A and -28C alleles in male subgroups adjusted by age. Conclusively, house dust mite was the most common allergen in ASD patients, and -403A allele of CCL5 promoter was a risk factor for IgE-mediated sensitization.
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Ellagitannins from Camellia oleifera Fruit Shell Extractives
Yi-Chang He,Wei Gao,Jie-Fang Yang,Young-Soo Bae,Chun-Xia Yang,Wei Ding,Zhen-Jun Gu,Mei-Jie Wu,Dong-Bo Yu,Hwang Gao,Cheng Zhou,Chun Gong 강원대학교 산림과학연구소 2022 강원대학교 산림과학연구소 학술대회 Vol.2022 No.10
Camellia is valued not only for its aesthetic contribution as ornament but also for its economic importance as it provides the beverage, tea, and edible oil in some countries, notably China. Apart from its use for ornamental purposes and production of tea, it is one of the four main oil-bearing trees (palm, coconut, olive, and tea) in the world. Camellia oleifera C. Abel, which originated in southern China, is notable as an important source of edible oil obtained from its seeds. It is commonly known as the oil-seed camellia or tea oil camellia, though to a lesser extent other species of Camellia are used in oil production too. Camellia japonica, one of the other tea trees, is distributed in Korea, China, Taiwan, and Japan. Previous studies have revealed that Camellia oleifera has significant biological activities and includes various kinds of chemical constituents such as terpenoids and flavonoids in its leaves, roots, seeds and fruit shells. The others also have reported the recent advances in the utilization of Camellia oleifera C. Abel through a review of nutritional constituents, bio-functional properties, and potential industrial applications. However, there was no study on nut shell extractives of Camellia oleifera even in China and moreover, hydrolysable tannins of the nut shell have never been reported yet. A phytochemical study of fruit shell of Camellia oleifera C. Abel led to the isolation of two ellagitannins, tellimagrandinⅠ(3) and tellimagrandin Ⅱ(4), including gallic acid (1) and ellagic acid (2). The structures of the isolated compounds were unambiguously elucidated on the basis of comprehensive spectroscopic data, especially 2D NMR such as HSQC and HMBC and MS data. Compounds 3 and 4 were first isolated from the extractives of Camellia oleifera fruit shell.
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