简介:AhighlyefficienttotalsynthesisofS-(+)-tylophorinehasbeenaccomplishedinfullyasymmetricfashion.
简介:Inthispaper,theconceptofthes-doublydiagonallydominantmatricesisintroducedandthepropertiesofthesematricesarediscussed.Withthepropertiesofthes-doublydiagonallydominantmatricesandthepropertiesofcomparisonmatrices,someequivalentconditionsforH-matricesarepresented.TheseconditionsgeneralizeandimproveexistingresultsabouttheequivalentconditionsforH-matrices.Applicationsandexamplesusingthesenewequivalentconditionsarealsopresented,andanewinclusionregionofk-multipleeigenvaluesofmatricesisobtained.
简介:利用MALDI-TOF-MS法测定了谷胱甘肽S-转移酶的分子量,并讨论和对比了三种不同基质对其影响,认为用α-氰基-4-羟基肉桂酸(α-CHC)作基质是最佳适宜条件。实验结果表明本方法优于其它传统的测定生物大分子分子量方法。
简介:研究了典型光活化毒素α-三噻吩(简称α-T)对棉铃虫Helicoverpaarmigera和亚洲玉米螟Ostriniafurnacalis谷胱甘肽S-转移酶(GSTs)的影响.结果表明:近紫外光照(300~400nm)对棉铃虫和亚洲玉米螟幼虫GSTs活性无显著影响,但两种昆虫GSTs对α-T的反应不同.无光照条件下,α-T对亚洲玉米螟离体GSTs活性没有影响,而高浓度α-T能抑制棉铃虫离体GSTs活性;高剂量α-T可使两种昆虫活体GSTs活性升高.光照条件下,高浓度和高剂量α-T抑制棉铃虫GSTs活性,而不影响亚洲玉米螟离体GSTs活性,但低剂量α-T抑制其活体活性,而高剂量α-T则诱导其活性增加.棉铃虫和亚洲玉米螟GSTs对α-T反应的差异,可能与它们对药剂的敏感性以及药剂在两者体内的穿透、运转、贮藏、代谢等生理特性上的差异有关.
简介:目的探讨应用S-腺苷-L-蛋白氨酸(SAMe)治疗老年性药物性肝损伤的疗效以及还原型谷胱甘肽对判断疗效的意义。方法应用S-腺苷-L-蛋氨酸(SAMe)对24例因各种药物引起的肝损害给予治疗,连续静脉给药800mg/日,3周,动态观察治疗前后临床表现和各项肝功能指标及GSH水平变化情况。结果治疗后精神、睡眠、食欲好转,乏力减轻,肝功能指标明显下降,GSH水平从治疗前的6.21±0.89mmol/L升至7.40±0.61mmol/L。结论S-腺苷-L-蛋氨酸(SAMe)对治疗老年性药物性肝损害有明显疗效,能明显改善肝功能和抗氧化作用。检测血清GSH水平变化情况对判断肝损害的疗效及预后有重要和直接的意义。
简介:""Mensaytheyhatetoshop,""saysZhukin,CityUniversityofNewYorkSociology(社会学)professor.""Yetwhenyouaskthemdeeperquestions,itturnsoutthattheyliketoshop.Mengenerallyliketoshopforbooks,musicandhardware.Butifyouaskthemabouttheshoppingtheydoforbooksormusic,they'llsay,'Well,that'snotshopping.That'sresearch.'""
简介:IntheAmamaAge,contactsbetweenEgyptanditsvassals,especiallyvassalsinthenorthernCanaan,areattestedintheAmamaLetters.Amurruhasoncebeenapowerfulstateintheeyesofothervassals,asisreflectedbytheAmamaLetters.AmongtheAmarnaLetters,therewereatleast78lettersrelatingtoAmurru.JustasMurnanepointsout,“WhenAmurrufirstappearsonthepoliticalmapofSyriainthefourteenthcenturyB.C.,itisnotastheunifiedcountryitwastobecome,butasaloosegroupingofcitystates,eachunderitsownrulers,”thekingdomofAmurrumayconsistedofmanycity-states.
简介:英语中有一些习语,其名词前用one’s与用sb’s的意义是不同的,择其常见者,介绍如下:1.goone’sway动身,前往gosb’sway事情对某人有利MrBournehospitablyaskedifIweregoinghisway.伯恩先生客气地问我是不是和他一起走。Iwokeuplatethismorning,andthenthetrafficdelayedmeasIcametowork—nothingseemstobegoingmywaytoday.我今天早晨醒得迟了,上班路上又因交通拥挤而耽误了时间,看来今天我没有碰上一件顺心事。2.takeone’splace就座,就位takesb’splace代替某人WhileIwaswondering,atthis,ourschool-mastertookhisplace.当我正为这些情景感到诧异