|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Finite element analysis of dynamic stability of skeletal structures under periodic loading显示文摘This paper addresses the dynamic stability problem of columns and frames subjected to axially applied periodic loads. Such a structure can become unstable under certain combinations of amplitudes and frequencies of the imposed load acting on its columns/beams. These are usually shown in the form of plots which describe regions of instability. The finite element method (FEM) is used in this work to analyse dynamic stability problems of columns. Two-noded beam elements are used for this purpose. The periodic loading is decomposed into various harmonics using Fourier series expansion. Computer codes in C++ using object oriented concepts are developed to determine the stability regions of columns subjected to periodic loading. A number of nu-merical examples are presented to illustrate the working of the program. The direct integration of the equations of motions of the discretised system is carried out using Newmark’s method to verify the results. | THANA Hemantha Kumar AMEEN Mohammed | 2007 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2007，8，2： | 4 |
| 2 | A new dielectric response model for water tree degraded XLPE insulation-patt A:Model development with small sample verification显示文摘 | Andrew J Thanas Tapan K Saha | | 0，，04： | 1 |
| 3 | Characterization of tar content in the syngas pro- duced in a downdraft type fixed bed gasification system from dried sewage sludge显示文摘 | Thana Phuphuakrat Nimit Nipattummakul Tomoaki Namio-ka | 2010 | Fuel2010，25，： | 1 |
| 4 | Neuronal MAP2 Mrna: species-depedet diffretial dendritic targeting competence显示文摘 | Cristofanilli M Thanas S Brosius J | 2004 | J Mol Biol2004，341，4： | 1 |
| 5 | Neuronal MAP-2 mRNA:species-depended differential dendritic targeting competence显示文摘 | Cristofanilli M Thanas S Brosius J | 2004 | J Mol Biol2004，341，4： | 1 |
| 6 | Response surface methodology to supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis 显示文摘 | Thana P Machmudah S Goto M | 2008 | Bioresource Technology2008，，99： | 1 |
| 7 | Antioxidant activities and phytochemical constituents of Antidesma thwaitesianum Müll. Arg. leaf extracts显示文摘OBJECTIVE: To investigate the antioxidant activities as well as phytochemical constituents of Antidesma thwaitesianum Müll. Arg. leaf extracts.METHODS: The leaves of A. thwaitesianum were extracted using three different methods: blending with distilled water, maceration with ethanol and decoction. The chemical antioxidant activity of the plant leaf extracts was evaluated using 2,2-diphenyl-1-picryhydrazyl(DPPH) radical and 2,2′-azinobis(3-ethylbenzo-thiazoline-6-sulfonic acid) diammonium salt(ABTS+) radical scavenging assays, as well as the ferric reducing antioxidant power assay. Cellular antioxidant activity was determined by superoxide and nitric oxide scavenging assays. The cytotoxicity of the leaf extracts in RAW 264.7 and differentiated HL-60 cells was tested in parallel using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide and 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium assays, respectively. The total phenolic and flavonoid contents were also assessed by spectrophotometric analysis. Phytochemical constituents of the most potent extract were investigated by liquid chromatography with an electrospray ionization quadrupole time-of-flight mass spectrometer(LC-ESI-QTOF-MS/MS).RESULTS: The ethanolic(ME) and decoction(LW) extracts of dried leaves had the highest chemical scavenging activity against DPPH and ABTS+ free radicals with half maximal effective concentration(EC50) values ranging from 3.54 to 6.44 μg/mL. ME and LW exerted moderate ferric reducing activity, with ferric reducing antioxidant power values of 847.41 and 941.26 mg Fe2+/g extract, respectively. Similarly, ME showed potent cellular scavenging activity against superoxide and nitric oxide radicals with EC50 values of 58.12 and 71.90 μg/mL, respectively. However, LW exhibited only strong nitric oxide scavenging activity with an EC50 value of 91.20 μg/mL. The cell viability of RAW 264.7 and HL-60 cells was greater than 70% in all tested concentrations of both extracts, thus confirming the absence of their cytotoxicity. ME and LW contained high total phenolic contents of 231.14 and 274.42 mg gallic acid equivalents per gram, respectively, as well as high total flavonoid contents of 18.82 and 22.17 mg quercetin equivalents per gram, respectively. LC-ESI-QTOFMS/MS analysis revealed the presence of 52 structurally characterized compounds in ME, 43 of whichwere tentatively identified. Hydroxycinnamic acids such as caffeic acid and its derivatives were the predominant phenolic compounds.CONCLUSION: This is the first report describing potent chemical and cellular antioxidant effects of the ethanolic leaf extract of A. thwaitesianum. The extract contained high total phenolic and flavonoid contents. LC-ESI-QTOF-MS/MS analysis further revealed an abundance of caffeic acid derivatives and flavonoids. These data support its potential use as dietary supplements in oxidative stress prevention. | Bhanuz Dechayont Arunporn Itharat Pathompong Phuaklee Jitpisute Chunthorng-Orn Thana Juckmeta Nuntika Prommee Nitra Nuengchamnong Pintusorn Hansakul | 2017 | Journal of Integrative Medicine2017，15，4： | 1 |
| 8 | pathogen esis of Porcine reproductive and respiratory syndrome virus in duced increase in susceptibility to Streptococcus suis infection显示文摘 | Thana wongnuwech R Brown GB Halbur PG | 2000 | VctPatho2000，37，2： | 1 |
| 9 | The role ofpulmonary intravascular macrophages in porcine reproductiveand respiratory syndrome virus infection 显示文摘 | THANA R HALBUR P THACKER E | 2000 | Animal Healthresearch review2000，，1： | 1 |
| 10 | The use of oral misoprostol as a cervicail ripening agent in operative hysteroscopy,A double-blind placebo-controlled mail显示文摘 | Thanas JA Lcyland N Durand N | 2003 | Am J Obstet Gynecol2003，188，1： | 1 |
| 11 | Neuronal MAP2 mRNA:species-dependent differential dendritic targeting competence 显示文摘 | Cristofanilli M Thanas S Brosius J | 2004 | Journal of Molecular Biology2004，341，4： | 1 |
| 12 | Response surfacemethodology to supercritical carbon dioxide extraction ofastaxanthin from Haematococcus pluvialis显示文摘 | Thana P Machmudah S Goto M$ | 2008 | BioresourceTechnology2008，99，8： | 1 |
| 13 | Absorptive removal of biomass tar using water and oily materials显示文摘 | Thana Phuphuakrat Tomoaki Namioka Kunio Yoshikawa | 2011 | Bioresource Technology2011，102，2： | 1 |
| 14 | Empiric Outpatient Therapy with Trimethoprim-Sulfamethoxazole, Cephalexin, or Clindamycin for Cellulitis显示文摘 | Thana Khawcharoenporn Alan Tice | 2010 | The American Journal of Medicine2010，，10： | 1 |
| 15 | Using combined probiotic to improve growth performance of weaned piglets on extensive farm conditions显示文摘 | Etleva Veizaj-Delia Thanas Piu Pashk Lekaj Myqerem Tafaj | 2010 | Livestock Science2010，，1： | 1 |
| 16 | Response surface methodology to supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis显示文摘 | Thana P Machmudah S Goto M | 2008 | Bioresource Technology2008，，99： | 1 |
| 17 | Response surface methodology to supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis显示文摘 | Thana P Machmudah S Goto M | | 0，，8： | 1 |
| 18 | Using combined probiotic to improve growth performance of weaned piglets on extensive farm con- ditions 显示文摘 | Etleva V D Thanas P Pashk L | 2010 | Livestock Science2010，134，： | 1 |
| 19 | Density functional theory study on catalytic cracking of n - hexane on heteropoly acid: A comparison with acidic zeolite 显示文摘 | Saowapak C Thana M Bundet B | 2012 | The Canadian Journal of Chemical Engineering2012，90，4： | 1 |
| 20 | Realtime image processing on a custom computing platform显示文摘 | A thanas PM Abbott AL | 1995 | Computer1995，28，2： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员