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Isoflavanones from the Stem of Cassia siamea and Their Anti-tobacco Mosaic Virus Activities
Hu, Qiu-Fen,Niu, De-Yun,Zhou, Bin,Ye, Yan-Qing,Du, Gang,Meng, Chun-Yang,Gao, Xue-Mei Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.10
Two new isoflavanones, (3R) 7,2',4'-trihydroxy-3'-methoxy-5-methoxycarbonyl-isoflavanone (1) and (3R) 7,2'-dihydroxy-3',4'-dimethoxy-5-methoxycarbonyl-isoflavanone (2), together with six known isoflavanones (3-8), were isolated from the stems of Cassia siamea. The structure of 1-8 was elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1, 2, 5-8 were evaluated for their anti-tobacco mosaic virus (Anti-TMV) activity. The results showed that compounds 1 and 6 showed potential anti-TMV activity with inhibition rates of 24.6% and 26.9%, respectively. Compounds 2, 5, 7, 8 also showed anti-TMV activity with inhibition rates in the range of 11.8-18.6%.
Chun-Li Lu,Ruo-Xiang Zheng,Xue Xue,Xiao-Wen Zhang,Xue-Han Liu,Xin-Yan Jin,Feng-Lan Pu,Hui-Di Lan,Min Fang,Ling-Yao Kong,Merlin Willcox,Bertrand Graz,Joelle Houriet,Xiao-Yang Hu,Jian-ping Liu 한국한의학연구원 2021 Integrative Medicine Research Vol.10 No.-
Background We aimed to investigate use of infection control behaviours, preventative and therapeutic interventions, and outcomes among respondents to an online survey during the COVID-19 pandemic in China. Methods The survey was designed by an international team, translated and adapted to simplified Chinese, including 132 kinds of traditional Chinese medicine (TCM) preparation recommended by guidelines. It was distributed and collected from February to May 2021, with data analysed by WPS spreadsheet and wjx.cn. Descriptive statistics were used to describe demographics and clinical characteristics, diagnosis, treatments, preventative behaviours and interventions, and their associated outcomes. Results The survey was accessed 503 times with 341 (67.8%) completions covering 23 provinces and four municipalities in China. Most (282/341, 82.7%) respondents reported no symptoms during the pandemic and the majority (290/341, 85.0%) reported having a SARS-CoV-2 PCR test at some point. Forty-five (13.2%) reported having a respiratory infection, among which 19 (42.2%) took one or more categories of modern medicine, e.g. painkillers, antibiotics; 16 (35.6%) used TCM interventions(s); while seven respondents combined TCM with modern medicine. All respondents reported using at least one behavioural or medical approach to prevention, with 22.3% taking TCM and 5.3% taking modern medicines. No respondents reported having a critical condition related to COVID-19. Conclusion We found evidence of widespread use of infection control behaviours, modern medicines and TCM for treatment and prevention of COVID-19 and other respiratory symptoms. Larger scale studies are warranted, including a more representative sample exploring TCM preparations recommended in clinical guidelines. Background We aimed to investigate use of infection control behaviours, preventative and therapeutic interventions, and outcomes among respondents to an online survey during the COVID-19 pandemic in China. Methods The survey was designed by an international team, translated and adapted to simplified Chinese, including 132 kinds of traditional Chinese medicine (TCM) preparation recommended by guidelines. It was distributed and collected from February to May 2021, with data analysed by WPS spreadsheet and wjx.cn. Descriptive statistics were used to describe demographics and clinical characteristics, diagnosis, treatments, preventative behaviours and interventions, and their associated outcomes. Results The survey was accessed 503 times with 341 (67.8%) completions covering 23 provinces and four municipalities in China. Most (282/341, 82.7%) respondents reported no symptoms during the pandemic and the majority (290/341, 85.0%) reported having a SARS-CoV-2 PCR test at some point. Forty-five (13.2%) reported having a respiratory infection, among which 19 (42.2%) took one or more categories of modern medicine, e.g. painkillers, antibiotics; 16 (35.6%) used TCM interventions(s); while seven respondents combined TCM with modern medicine. All respondents reported using at least one behavioural or medical approach to prevention, with 22.3% taking TCM and 5.3% taking modern medicines. No respondents reported having a critical condition related to COVID-19. Conclusion We found evidence of widespread use of infection control behaviours, modern medicines and TCM for treatment and prevention of COVID-19 and other respiratory symptoms. Larger scale studies are warranted, including a more representative sample exploring TCM preparations recommended in clinical guidelines.
Yan-Qing Ye,Cong-Fang Xia,Juan-Xia Yang,Yu-Chun Yang,Ying Qin,Xue-Mei Gao,Gang Du,Xuemei Li,Qiu-Fen Hu 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.10
Two new butyrolactones, asperphenol A (1) and B (2), together with four known butyrolactones (3-6) were isolated from the fermentation products of an endophytic fungus Aspergillus versicolor. Their structures were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1-6 were also tested for their anti-tobacco mosaic virus (anti-TMV) activities. The results showed that compound 2 exhibited high anti-TMV activity with inhibition rate of 46.7%. The other compounds also exhibited potential anti-TMV activities with inhibition rates in the range of 21.8-28.4%.
Chun-Lian Liu,Xiao-Ping Hu,Wei-Dong Guo,Li Yang,Jie Dang,Hai-Yan Jiao 한국유방암학회 2013 Journal of breast cancer Vol.16 No.4
Purpose: Genetic variation in fibroblast growth factor receptor 2(FGFR2) is a newly described risk factor for breast cancer. Thisstudy aimed to evaluate the association of four single nucleotidepolymorphisms (SNPs) in FGFR2 with breast cancer in Han Chinesewomen. Methods: Two hundred three women with breastcancer and 200 breast cancer-free age-matched controls wereselected. Four SNPs (rs2981579, rs1219648, rs2420946, andrs2981582) and their haplotypes were analyzed to test for theirassociation with breast cancer susceptibility. The presence ofthe four FGFR2 SNPs was determined by polymerase chain reaction-restriction fragment length polymorphism analysis. Results:A statistically significant difference was observed in thefrequency of rs2981582 in the FGFR2 gene (p<0.05) betweencase and control groups. In subjects stratified by menopausalstatus, rs2981582 TT, rs2420946 AA, and rs1219648 CC weresignificantly associated with the risk of breast cancer in postmenopausalsubjects, but no significant associations betweenthese four SNPs and the risk of breast cancer were identified inpremenopausal subjects. Further, there was no significant associationbetween hormone receptor status (estrogen receptor andprogesterone receptor) and breast cancer risk. Six common (>3%) haplotypes were identified. Three of these haplotypes,CGTC (odds ratio [OR], 0.613; 95% confidence interval [CI],0.457-0.82; p=0.001), TGTC (OR, 6.561; 95% CI, 2.064-20.854;p<0.001), and CATC (OR, 12.645; 95% CI, 1.742-91.799; p=0.001) were significantly associated with breast cancer risk. Conclusion:Our findings indicated that the SNP rs2981582 and haplotypesCGTC, TGTC, and CATC in FGFR2 may be associatedwith an increased risk of breast cancer in Han Chinese women.
Ye, Yan-Qing,Xia, Cong-Fang,Yang, Juan-Xia,Yang, Yu-Chun,Qin, Ying,Gao, Xue-Mei,Du, Gang,Li, Xue-Mei,Hu, Qiu-Fen Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.10
Two new butyrolactones, asperphenol A (1) and B (2), together with four known butyrolactones (3-6) were isolated from the fermentation products of an endophytic fungus Aspergillus versicolor. Their structures were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1-6 were also tested for their anti-tobacco mosaic virus (anti-TMV) activities. The results showed that compound 2 exhibited high anti-TMV activity with inhibition rate of 46.7%. The other compounds also exhibited potential anti-TMV activities with inhibition rates in the range of 21.8-28.4%.
Flavones from the Bark of Lindera caudata and Their Anti-Tobacco Mosaic Virus Activity
Yu-Chun Yang,Ying Qin,Xian-Xue Wu,Cong-Fang Xia,Yan-Lin Meng,Bin Zhou,Yan-Qing Ye,Xue-Mei Gao,Yin-Ke Li,Qiu-Fen Hu 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.4
Two new flavones, 5-hydroxy-8-hydroxymethyl-7,4′-dimethoxy-flavone (1) and 6-hydroxy-8-hydroxymethyl-7,4′-dimethoxy-flavone (2), together with six known flavones (3–8), were isolated from the bark of Lindera caudata. The structures of 1–8 were elucidated by spectroscopic methods including extensive 1D and 2D NMR techniques. Compounds 1–8 were evaluated for their anti-tobacco mosaic virus (anti-TMV) activity. The results showed that Compounds 1 and 2 showed high anti-TMV activity with inhibition rates of 31.2 and 28.8%, respectively. These values are close to those of positive control.
Polymer Nanostructured Components Machined Directly by the Atomic Force Microscopy Scratching Method
Yong Da Yan,Da Wei Gao,Zhen Jiang Hu,Xue Sen Zhao,Jiu Chun Yan 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.
This study aims to machine complex three dimensional nano-structures on polymer surfaces directly using the Atomic Force Microscopy (AFM)-based nano-mechanical processing method. Processing parameters including the normal load, the feed rate, the machining speed and the scanning direction are optimized by the Taguchi method. Their effects on the machined depth and the surface roughness of the machined structures are analyzed. Meanwhile, the AFM PZT tube is controlled to achieve the tip’s three-dimensional motions in space. Using the optimized processing parameters, three-dimensional nanostructures on the surface of PMMA are directly fabricated. It is a novel low-cost manufacturing method for machining complex three-dimensional nano-structures or nano parts on polymer surfaces directly.
Isoflavanones from the Stem of Cassia siamea and Their Anti-tobacco Mosaic Virus Activities
Qiu-Fen Hu,De-Yun Niu,Bin Zhou,Yan-Qing Ye,Gang Du,Chun-Yang Meng,Xue-Mei Gao 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.10
Two new isoflavanones, (3R) 7,2',4'-trihydroxy-3'-methoxy-5-methoxycarbonyl-isoflavanone (1) and (3R) 7,2'-dihydroxy-3',4'-dimethoxy-5-methoxycarbonyl-isoflavanone (2), together with six known isoflavanones (3-8), were isolated from the stems of Cassia siamea. The structure of 1-8 was elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1, 2, 5-8 were evaluated for their antitobacco mosaic virus (Anti-TMV) activity. The results showed that compounds 1 and 6 showed potential anti- TMV activity with inhibition rates of 24.6% and 26.9%, respectively. Compounds 2, 5, 7, 8 also showed anti- TMV activity with inhibition rates in the range of 11.8-18.6%.