简介:ThispaperpresentsabriefoverviewofCO2reformingofCH4(CRM)byvariousformsof'arc'plasma,whichismoresuitabletoCRM,andtheenergyefficiencyisusedtoevaluatedifferentplasmaprocessesspecifically.Accordingtothereportedresults,thearcthermalplasmawithbinodeexhibitedbetterperformance.Moreover,theplasmaCRMprocesswascomparedwiththereportedplasmasteamreformingofCH4(SRM)process,andtheresultsshowedthattheformerprocesshasadvantagesonenergyefficiencyandCH4consumption.Additionally,itisbelievedthattheplasmaCRMprocesswouldbecompetitivewiththeconventionalSRMprocessinbothenergyefficiencyandCO2emissiononcetheheatmanagementisemphasizedandtherenewablepowerisused.Finally,aconceptofplasmareactorforindustrialapplicationisproposed.
简介:目的:建立用HPLC法同时测定二仙汤中淫羊藿黄酮类成分朝藿定B、朝藿定C、淫羊藿苷、淫羊藿次苷Ⅱ的含量。方法:采用AgilentExtendC18色谱柱(250mm×4.6mm,5μm);流动相:乙腈(A)和0.1%磷酸溶液(B),梯度洗脱,0~23min,20%~28%A;23~55min,28%~40%A;55~56min,40%~90%A;56~62min,90%A;流速1ml/min;进样量20μl;柱温25℃;检测波长270nm。结果:朝藿定B、朝藿定C、淫羊藿苷、淫羊藿次苷Ⅱ分别在1.9~25.0、2.8~36.0、2.1~27.0和1.3~10.2μg/ml范围内呈良好的线性关系,平均加样回收率分别为(101.4±2.32)%、(99.8±2.21)%、(97.2±2.01)%和(99.3±1.30)%(n=6)。结论:该方法简便、灵敏、重复性好,可用于二仙汤中淫羊藿黄酮类成分的含量测定。
简介:目的:分析并探讨卵巢癌患者腹水及外周血CD4~+CD25~+调节性T细胞含量及抑制功能。方法:选取2012年2月至2015年2月期间在我院和宁波市鄞州第二医院接受治疗的卵巢癌患者56例,采集腹水标本56例,外周血标本56例。使用流式细胞术检测CD4~+CD25~+调节性T细胞(Treg)的表达。采用1.5μmol/L的羧基荧光素二醋酸盐琥珀酰亚胺脂(CFSE)标记CD4~+CD25-T细胞,观察CFSE标记效果,计算抑制率。结果:研究结果显示,56例腹水患者CD4~+CD25~+Tcells/CD4~+Tcell为(28.34±13.27)%,56例外周血标本CD4~+CD25~+Tcells/CD4~+Tcell为(14.56±4.36)%。腹水和外周血标本CD4~+CD25~+Tcells/CD4~+Tcell含量有显著差异(P〈0.05)。腹水Treg抑制功能比外周血Treg强,经统计学检验,差异具有统计学意义(P〈0.05)。结论:腹水Treg含量及抑制功能比外周血Treg强,提示卵巢癌腹腔内相对容易发生免疫逃逸,而Treg升高可能参与促进肿瘤复发。
简介:在高中阶段,同浓度的NaHCO3溶液和CH3COONa溶液的pH比较在高中习题和各地高考题中都多次涉及,但笔者经过多方面实验和计算,发现两者比较存在很多问题,教师编制练习题时应审慎处理。
简介:摘要目的检测罗氟司特片的含量及其含量均匀度。方法采取A、B两种不同的方法对氟司特片的含量及其含量均匀度进行检测,方法A色谱柱C18,色谱柱温度40℃,流动相速度是1ml/min,流动相(4555)0.01mol?L-KH2PO4溶液,PH值用NaOH调节至6.1,进样量是20ul。方法B色谱柱C18,乙腈-水(6535)为流动相,色谱柱温度25℃,流动相速度是1ml/min。结果方法A测得含量均度为A+1.80S=2.39,含量是99.78%,结果准确,精密度RSD=1%,浓度范围呈良好的线性关系,回收率是102%,24小时内溶液稳定;方法B测得含量均度为A+1.80S=2.11,含量是88.23%,结果较准确,精密度RSD=0.78%,浓度范围的线性关系的趋势呈现不明显,回收率是96%,24小时内溶液稳定性差。结论采用方法A色谱柱C18,色谱柱温度40℃,流动相速度是1ml/min,流动相(4555)0.01mol?L-KH2PO4溶液,PH值用NaOH调节至6.1,进样量是20ul。能够较为准确的测量出罗氟司特片的含量及其含量均匀度,且稳定性较好,准确率较高。
简介:Weexperimentallydemonstratea4×4nonblockingsiliconthermo-optic(TO)switchfabricconsistingofthreestagesoftunablegeneralizedMach–Zehnderinterferometers.All24routingstatesfornonblockingswitchingarecharacterized.Thedevice’sfootprintis4.6mm×1.0mm.Measurementsshowthattheworstcrosstalkofallswitchingstatesis-7.2dB.Theon-chipinsertionlossisintherangeof3.7–13.1dB.TheaverageTOswitchingpowerconsumptionis104.8mW.
简介:Basedonthebackgroundof'Internet+',afterfullysortingandstudyingontherelevantliteratureoffocusstrategy,thepapersummarizesthebasicmodesandinfluencefactors.Choosingtheimplementationoffocusstrategyisthebestwaytogainthecompetitiveadvantageinthenarrowmarket,butnotalltheenterprisesaresuitabletochoosefocusstrategy.Thispapermainlyusesthecasestudymethod,KunmingCh999isselectedasacasestudysample,throughtheresourcesandcapabilityanalysisofCh999,aswellasthecomparisonswithtwoe-commerceplatformsofTaobaoandJingdong,extractingfocusstrategymodesofCh999,theinfluencefactorsandrisksoffocusstrategyofCh999arealsostudied.Finally,inordertoensurethesmoothimplementationoffocusstrategy,puttingforwardsomeriskpreventionmeasures.