简介:Inthiswork,DSCandSEMstudiesindicatethation-ligandinteractioncanbeutilizedtoenhancetheinteractionofpoly(styrene-block-2-vinylpyridine)[P(S-b-2VP)]andpolyethylenebasedionomer(Surlyn).Thecompatibilityforthisblendingsystemcanbeimprovedbythisspecialinteractionand20/80wtistheoptimumblendingcompositionwithgoodcompatibility.FTIRresultsfurthercertifythatstronginteractionsexistintheblendingsystem.
简介:TwoseriesofterritremBanalogues(10a-10cand18)havebeendesignedandsynthesizedfromjujubogenin5awhichwaspreparedfromjujubogeninglycosides5bobtainedfromtheleavesofZizyphusjujuba.Thestructuresofthenewcompoundswereconfirmedby1H-,13C-NMRandMSdata.Compounds10cand18showedweakinhibitoryeffectonAChEat10^-4mol/E.
简介:摘要: 目的:研究分析磁疗系统配合常规治疗对于矽肺患者的效果与作用。方法:选择从2019年1-12月来我院接受治疗的矽肺患者52名,将其随机分成治疗组和对照组,治疗组25名,对照组27名,治疗组增加磁疗系统治疗,每日一次,每次30min。比较治疗组和对照组的患者在治疗后的肺功能变化情况、基本病症的改善情况。结果:经过一段时间治疗后,治疗组有21例患者病情得到改善,总有效率达84.00%;对照组有19例患者病情得到改善,总有效率达70.37%,两组疗效差异有统计学意义(P<0.05)。结论:治疗组所提倡的磁疗系统与西医疗法相结合使用的方法对于治疗矽肺患者有明显的优势,值得在临床上推广使用。
简介:9月15日中午,中货航引进的第2架B747-400ERF货机从美国西雅图顺利飞抵上海浦东国际机场。
简介:The2-C,methylenegroupof1-aroyl-1,2-dihydro-3H-naphtho[2,1-b]pyran-3-ones(2)havebeenshowedtopossessasuperiorreactivitytowardsmanyoforganicreagents.Thena-phthopyrones(2)condensedwitharomaticaldehydestogivethe2-arylidinederivatives(3).Bromin-ationof2gave1,2-dibromo(4)or5-bromo(5)derivativesdependingonthereactionconditions.Thebasecatalyzedadditionorcycloadditionofnaphthopyrones(2)to4-methoxybenzalacetophenonegavetheexpectedMichaeladduct(6)orthecyclicadducts(7-9)dependingonthetypeofcatalyticbaseandreactionconditions.Structuresoftheproductshavebeenestablishedbyelementalanalyses,IRand~1HNMRspectroscopicmethods.