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Two new ortho benzoquinones from Uncaria rhynchophylla 被引量:8
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作者 ZHANG Qian CHEN Lei +3 位作者 HU Le-Jian LIU Wen-Yuan FENG Feng QU Wei 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2016年第3期232-235,共4页
The present study was designed to determine the chemical constituents of the stems and hooks of Uncaria rhynchophylla. The chemical constituents were isolated and purified from CH_2Cl_2 fraction by chromatography. The... The present study was designed to determine the chemical constituents of the stems and hooks of Uncaria rhynchophylla. The chemical constituents were isolated and purified from CH_2Cl_2 fraction by chromatography. Their structures were elucidated by spectroscopic analyses. Their cytotoxicity was tested using MTT method. Two new ortho benzoquinones, 3-diethylamino-5-methoxy-1, 2-benzoquinone(1) and 3-ethylamino-5-methoxy-1, 2-benzoquinone(2), together with a known compound isorhynchophyllic acid(3) were isolated from U. rhynchophylla. These compounds were evaluated for their cytotoxicity against cancer cells A549, Hep G2 and A2780. Compounds 1 and 2 were new ortho benzoquinones and showed weak antiproliferative activities on A549, Hep G2 and A2780 cells. Compound 3 significantly inhibited the proliferation of A549, Hep G2 and A2780 cells with IC_(50) values being 5.8, 12.8 and 11.8 μmol·L^(–1), respectively. 展开更多
关键词 Uncaria rhynchophylla ortho benzoquinones Spectroscopic identification
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全自动血型分析仪使用前性能验证与评价
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作者 王敏 于慧芳 +1 位作者 谭安超 苏莉 《中国医疗器械信息》 2024年第17期45-47,176,共4页
目的:投入临床使用前对Ortho Vision Max全自动血型分析仪进行性能验证,确保该仪器能够准确可靠地完成检测任务。方法:选取一批经过BioRad IH-1000全自动血型分析仪验证过的ABO血型正反定型样本、RhD血型样本及不规则抗体筛查样本作为参... 目的:投入临床使用前对Ortho Vision Max全自动血型分析仪进行性能验证,确保该仪器能够准确可靠地完成检测任务。方法:选取一批经过BioRad IH-1000全自动血型分析仪验证过的ABO血型正反定型样本、RhD血型样本及不规则抗体筛查样本作为参照,利用Ortho Vision Max全自动血型分析仪重新进行检测,以此对该仪器开展血型鉴定、不规则抗体筛查等方面的内容,涉及对精确度的检验、对其长期稳定性的检测,对污染率实施评估,且进行抗干扰能力试验。此外,选取16份具有不同血型抗体效价的样本,分别采用手工卡式微柱凝胶法与Ortho Vision Max全自动血型分析仪进行检测,将两者结果进行对比研究。结果:Ortho Vision Max全自动血型分析仪在各项性能测试中表现优秀,不仅其检测准确性、稳定性达标,而且有效控制了携带污染风险并表现出良好的抗干扰性;同时,该仪器在血型抗体效价测定方面也符合预期标准。结论:Ortho Vision Max全自动血型分析仪能完全满足临床应用的要求,可以投入日常使用。 展开更多
关键词 性能验证 输血相容性检测 ortho VISION MAX
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Ortho One PROMT评分预测半月板撕裂可修复性的作用 被引量:4
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作者 肖琼润 杨国夫 孙浩源 《实用骨科杂志》 2020年第7期587-590,604,共5页
目的本研究目的在于评估Ortho One PROMT评分在预测半月板撕裂可修复性方面的准确性,检验其是否具备解决术前半月板手术方式预测困难的能力。方法纳入本院2019年3月至2019年12月因半月板损伤而接受关节镜下手术者55膝58侧半月板。本研... 目的本研究目的在于评估Ortho One PROMT评分在预测半月板撕裂可修复性方面的准确性,检验其是否具备解决术前半月板手术方式预测困难的能力。方法纳入本院2019年3月至2019年12月因半月板损伤而接受关节镜下手术者55膝58侧半月板。本研究分为两个部分。第一部分:评分过程由两位医生按Ortho One PROMT评分细则分别对半月板损伤者进行独立评分,并根据得分预测半月板手术术式。第二部分:将两位评分医生预测的半月板手术术式分别与手术医生的实际手术术式进行一致性比较,最终评价Ortho One PROMT评分在预测半月板撕裂可修复性方面的准确性、敏感度及特异度。结果评分医生预测半月板修复的平均正确率为86.9%,平均敏感度为86.9%,平均特异度为87.5%,平均阳性预测值92.9%,平均阴性预测值为77.9%;预测半月板切除的平均正确率为87.5%,平均敏感度为87.5%,平均特异度为86.9%,平均阳性预测值为77.9%,平均阴性预测值为92.9%。两位评分医生的预测结果与手术医生的实际术式高度一致(k=0.78,k=0.67)。结论Ortho One PROMT评分预测半月板撕裂可修复性不仅简便、可操作性强,而且具有良好的准确性、敏感度和特异度,能够有效解决当前术前半月板手术方式预测困难的问题,具有一定的临床应用推广价值。 展开更多
关键词 半月板撕裂 ortho One PROMT评分 半月板修复性 术前预测
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苯甲醛类产品的研究进展 被引量:3
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作者 吴雨龙 王为国 +1 位作者 陈苏芳 王存文 《广东化工》 CAS 2006年第7期40-42,共3页
本文围绕苯甲醛分子上所取代的基团不同,将苯甲醛类产品划分成含吸电子基和供电子基两大类,并综述了近几年来该类产品的研究情况,指出了其研究的难度和今后的研究方向。
关键词 苯甲醛类 邻位 对位 间位 吸电子基 供电子基
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复数矩及它们的应用(英文) 被引量:4
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作者 王耀明 《上海电机学院学报》 2006年第3期1-3,共3页
复数矩是以复数为核的矩函数,它有许多不同的类型。常用的复数矩有径向矩、Fourier-Mellin矩、Zernike矩。用复数矩可容易地获得矩的旋转和尺度不变量。复数矩在目标姿态、目标方位的计算、图像重构和其他领域(如图像处理、图像识别和... 复数矩是以复数为核的矩函数,它有许多不同的类型。常用的复数矩有径向矩、Fourier-Mellin矩、Zernike矩。用复数矩可容易地获得矩的旋转和尺度不变量。复数矩在目标姿态、目标方位的计算、图像重构和其他领域(如图像处理、图像识别和计算机视觉等)有广泛的应用。 展开更多
关键词 复数矩 径向矩 Fourier-Mellin矩 正交集
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两种光固化正畸粘接剂聚合度的比较 被引量:1
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作者 欧平花 厉松 倪景华 《北京口腔医学》 CAS 2010年第3期135-137,共3页
目的比较两种光固化正畸粘接剂Transbond XT和Fuji ortho LC在传统卤素灯(Halogen)不同光照时间作用下的聚合度。方法 30颗上颌中切牙金属托槽分成6组(每组5颗)。用标准量的粘接剂将托槽粘接于牙齿表面,随机分配3组用Transbond XT粘接... 目的比较两种光固化正畸粘接剂Transbond XT和Fuji ortho LC在传统卤素灯(Halogen)不同光照时间作用下的聚合度。方法 30颗上颌中切牙金属托槽分成6组(每组5颗)。用标准量的粘接剂将托槽粘接于牙齿表面,随机分配3组用Transbond XT粘接剂进行粘接,3组用Fuji ortho LC进行粘接。每一种粘接剂使用Halogen灯光照不同时间进行固化。每组通过傅里叶变换红外光谱仪记录红外吸收峰进行聚合度分析。实验结果通过方差分析(ANOVA)和t检验进行统计学分析。结果 Fuji ortho LC在相同光照时间作用下的聚合度(88.28±4.08%)要大于Transbond XT(53.56±6.06%),其差异具有统计学意义。光照时间的不同对粘接剂聚合度的影响无统计学意义。结论两种粘接剂的聚合度存在显著差异,而光照时间对粘接剂聚合度的影响没有差别。 展开更多
关键词 Transbond XT FUJI ortho LC 光固化 聚合度
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2种耐湿性托槽粘结体系粘结强度的比较研究 被引量:1
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作者 柳杨 韩翔 《口腔医学》 CAS 2013年第5期311-314,共4页
目的比较3M Transbond MIP处理液+3M Transbond PLUS变色光固化粘结剂与GC Ortho LC光固化树脂加强型玻璃离子2种粘结体系的粘结强度。方法收集因正畸治疗而拔除的上颌前磨牙80颗,按照随机化原则分成8组,每组10颗。将2种粘结体系分别在... 目的比较3M Transbond MIP处理液+3M Transbond PLUS变色光固化粘结剂与GC Ortho LC光固化树脂加强型玻璃离子2种粘结体系的粘结强度。方法收集因正畸治疗而拔除的上颌前磨牙80颗,按照随机化原则分成8组,每组10颗。将2种粘结体系分别在干燥、水分污染、唾液污染和血液污染的条件下完成托槽粘结,用电子万能试验机测试剪切强度,并在显微镜下用ARI指数评价各组牙齿表面残余的粘结剂。结果在剪切强度测试中,第1组与第5组比较,第2组与第6组比较,第3组与第7组比较,P>0.05,均无统计学差异;第4组与第8组比较,P<0.01,有统计学差异。ARI评分结果提示两者在干燥、水分污染及唾液污染环境下的ARI平均分值无统计学差异,但在血液污染的条件下,GC Ortho LC的ARI值明显降低。结论 3M Transbond MIP处理液+3M Transbond PLUS变色光固化粘结剂与GC Ortho LC光固化树脂加强型玻璃离子在干燥、水分污染及唾液污染的环境下,粘结强度无明显差异,在血液污染的条件下,推荐使用3M Transbond MIP粘结体系。 展开更多
关键词 3M Transbond MIP处理液 GC ortho LC 粘结强度 剪切强度 ARI
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RANKL^(+) senescent cells under mechanical stress: a therapeutic target for orthodontic root resorption using senolytics 被引量:2
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作者 Yue Zhou Aki Nishiura +7 位作者 Hidetoshi Morikuni Wenqi Deng Toru Tsujibayashi Yoshihiro Momota Yuki Azetsu Masamichi Takami Yoshitomo Honda Naoyuki Matsumoto 《International Journal of Oral Science》 SCIE CAS CSCD 2023年第2期278-290,共13页
In dentistry,orthodontic root resorption is a long-lasting issue with no effective treatment strategy,and its mechanisms,especially those related to senescent cells,remain largely unknown.Here,we used an orthodontic i... In dentistry,orthodontic root resorption is a long-lasting issue with no effective treatment strategy,and its mechanisms,especially those related to senescent cells,remain largely unknown.Here,we used an orthodontic intrusion tooth movement model with an L-loop in rats to demonstrate that mechanical stress-induced senescent cells aggravate apical root resorption,which was prevented by administering senolytics(a dasatinib and quercetin cocktail). 展开更多
关键词 STRESS THERAPEUTIC ortho
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重庆地区正常人头影测量Coben及Wits分析与颅面结构特征的研究 被引量:2
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作者 周建 李晓智 王萍 《临床口腔医学杂志》 2004年第10期579-582,共4页
目的 :建立重庆地区正常人群Coben、Wits分析法的正常值 ,探讨颅颌面结构的地区、性别特征。方法 :选择 182例重庆籍正常样本 ,成人 42例 (男 19例 ,女 2 3例 ) ,年龄 18-2 1岁 ;儿童 14 0例 (男 62例 ,女 78例 ) ,年龄 12— 16岁... 目的 :建立重庆地区正常人群Coben、Wits分析法的正常值 ,探讨颅颌面结构的地区、性别特征。方法 :选择 182例重庆籍正常样本 ,成人 42例 (男 19例 ,女 2 3例 ) ,年龄 18-2 1岁 ;儿童 14 0例 (男 62例 ,女 78例 ) ,年龄 12— 16岁。所有样本拍摄X线头颅定位侧位片 ,进行头影测量及男女间、儿童与成人间的比较。并与上海地区成人Coben分析法的正常值作比较。结果 :得到重庆地区正常人群Coben、Wits分析法的正常值。儿童与成人间差别体现在线距方面。男女间在线距、比例指数上均存在差别 ,经成组t检验 ,多变量方差分析有统计学意义。线距项目正常值重庆地区与上海地区调查结果存在差别 ,比例指数项目基本无差别。结论 :Coben分析法正常值男女间颅面部大小、比例关系上存在差别 ,不同地区人群头影测量值存在差别。 展开更多
关键词 口腔正畸 Cohen分析法 Wits分析法 头影测量
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Photo Acoustic Thermal for Human Bone Characterization: A Feasibility Study
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作者 James Rizkalla Vinay Kumar Suryadevara +3 位作者 Ashok Kumar Thella Ahdy Helmy Paul Salama Maher E. Rizkalla 《Journal of Biomedical Science and Engineering》 2016年第9期445-449,共5页
The possible features of photo acoustic tomography (PAT) in medical research and practice, including applications in orthopedics and cardiovascular areas, among others, have motivated the emphasis of this study toward... The possible features of photo acoustic tomography (PAT) in medical research and practice, including applications in orthopedics and cardiovascular areas, among others, have motivated the emphasis of this study towards human bone applications. PAT modality is an emerging approach that features safety and greater penetration depth compared to other modalities such as X-ray and microwave. The high-resolution images and safety related to PAT modality are attributed to the scattering properties of ultrasound as compared to light within a human tissue. PAT brought considerable attention from the medical research community to target optimum parameters for practical models. It includes source frequency penetration depth, dynamic temperature responses, and acoustic pressure throughout the multilayer structure of the human tissues. In this work, the acoustic pressure and the bio-heat equations were analyzed for power distribution and penetration depth, covering the basic principles of PAT within the human body. Three sources with three dif-ferent heat energy pulses;1 s, 3 s, and 5 s, were considered in order to study the rise time and fall time dynamic responses inside the bone material. The computer simulation was designed to simu-late the human tissue at 1 MHz with an acoustic pressure of 1 MPa. A penetration depth for all sources was estimated to be near 4 cm with a temperature change from 0.5 K to near 1 K over a pe-riod of 10 s. The simulation data provide promising results when taken to the next level of practical implementation. The 4 cm penetration depth range may enable the researchers to investigate mul-tiple layers within the human body, leading to non-invasive deterministic approach. The simulation presented here will serve as a pilot study towards photoacoustic applications in orthopedic applica-tions. 展开更多
关键词 Photoacoustic Tomography PAT PA ortho COMSOL
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Chiron、Ortho准备购买杜邦的血液筛选产业
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作者 邓永鸿 《生物技术通报》 CAS CSCD 1990年第7期24-25,共2页
目前是诊断剂世界的一个调整时期.Chiron 公司 (加利福尼亚,Emeryville)和 Ortho诊断系统公司(Johnson & Johnson 的一个分公司,新译西州,New Brunswick)准备收购杜邦公司(特拉华州,Wilmington)的大部分艾滋病和肝炎血液筛选产业.... 目前是诊断剂世界的一个调整时期.Chiron 公司 (加利福尼亚,Emeryville)和 Ortho诊断系统公司(Johnson & Johnson 的一个分公司,新译西州,New Brunswick)准备收购杜邦公司(特拉华州,Wilmington)的大部分艾滋病和肝炎血液筛选产业.虽然价格没有透露,但诊断剂公司通常是以年收入的价格出售.Chiron 和 Ortho 展开更多
关键词 Chiron ortho 诊断系统 尼亚 特拉华州 调整时期 伊利诺斯州 ortho 分析仪器 非洲国家
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Electrocatalytic reduction of ortho nitrobenzaldehyde using modified aluminum electrode and its determination
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作者 Vairamuthu Raj Jayachandran Silambarasan Panchanathan Rajakumar 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第7期1531-1539,共9页
A simple, cost effective and rapid electrochemical method has been developed for the determination of micro level ortho nitrobenzaldehyde(ONB) based on outstanding properties of modified aluminum electrode tin nanor... A simple, cost effective and rapid electrochemical method has been developed for the determination of micro level ortho nitrobenzaldehyde(ONB) based on outstanding properties of modified aluminum electrode tin nanorods/anodic aluminum oxide/aluminum(SnNR/AAO/Al) for the first time. The SnNR/AAO/Al electrode was fabricated by a second step anodization, followed by electrodeposition and its electrochemical behavior was investigated in detail. The cyclic voltammetry results indicated that the SnNR/AAO/Al electrode exhibited efficient electrocatalytic activity toward reduction of ONB in the acidic solution. It provides an appreciable improvement of reduction peak for ONB at-0.721 V.Furthermore, various kinetic parameters such as transfer electron number, transfer proton number and standard heterogeneous rate constant were calculated from the scan rates.The electrocatalytic behavior was further exploited as a sensitive detection scheme for the ONB determination by differential pulse voltammetry. Under the optimized conditions, the concentration range and detection limit are 0.1-100 μmol/L and 0.05 μmol/L, respectively,for ONB. The analytical performance of this modified sensor has been evaluated for detection of real sample such as river water and recovery of ONB was achieved all-out up to102.3% under standard addition method. 展开更多
关键词 Electrochemical sensor Organic pollutant Aluminum electrode Anodic aluminum oxide Tin nanorods ortho nitrobenzaldehyde Cyclic voltammetry
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NEIMADIAN-POINT ACUPUNCTURE ANESTHESIA IN ORTHOPEDIC SURGERY OF EXTREMITIES: AN ANALYSIS OF 198 CASES 被引量:2
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作者 Chang Gengshen Li Jinming Wang Fangxuan, Louyang Orthopedic Institute, Luoyang, Henan Province, China 《World Journal of Acupuncture-Moxibustion》 1992年第4期38-39,共2页
Neimadian-point is a newly-found acupointwith a good analgesic effect. 306 orthopedic op-erations on extremities were underNeimadian-point acupuncture anesthesia withgood results. 198 cases with complete clinicalmate... Neimadian-point is a newly-found acupointwith a good analgesic effect. 306 orthopedic op-erations on extremities were underNeimadian-point acupuncture anesthesia withgood results. 198 cases with complete clinicalmaterials were selected and analyzed in the pa-per. 展开更多
关键词 anesthesia ANALGESIC acupuncture MERIDIAN minutes MEDIAL SENSATION proximal shortest ortho
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DR系统的长骨拼接流程优化及难点对策 被引量:1
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作者 邹海蓉 《中国医疗器械杂志》 2023年第6期630-633,644,共5页
长骨拼接图像是临床上用于诊断脊椎和腿部病变的一个重要手段。由于整个工作流程需要在不同位置多次曝光,总时间长且步骤烦琐,导致不仅工作效率低,而且很难获得理想的拼接效果。对工作流程的优化不但可以减轻操作者的工作量,提高工作效... 长骨拼接图像是临床上用于诊断脊椎和腿部病变的一个重要手段。由于整个工作流程需要在不同位置多次曝光,总时间长且步骤烦琐,导致不仅工作效率低,而且很难获得理想的拼接效果。对工作流程的优化不但可以减轻操作者的工作量,提高工作效率,而且可以提高患者在拍摄过程中的舒适度,从而最终保证图像的拼接质量。该文首先介绍了长骨拼接功能的背景、工作流程。然后对每一个优化流程的方案进行详细阐述,对在实现过程中遇到的难点进行分析,并给出对策和解决方案;对如何在DR系统中实现长骨拼接功能提供了详尽的参考。 展开更多
关键词 长骨拼接功能 DR系统 流程优化 难点 解决方案
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STUDIES ON CYANATION OF O-HALOGENATED AZO DYES(Ⅰ)IDENTIFICATION OF THE PRODUCTS OF THE CYANATION 被引量:2
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作者 李卓舒 胡家振 侯毓汾 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1990年第2期174-186,共13页
The molecular structures of the products of the cyanation of 2,6-bromo-4-nitro-4′-(N,N-diethy1)-azo dye withCuCN were analyzed and identified.Mechanism of the formation of the by-products was also discussed.
关键词 bromo NITRO BRILLIANT transitional ALKYL struc infra FIGURES ortho catalysis
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飞马V10在大渡河某引水工程中的应用
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作者 张锟 《测绘通报》 CSCD 北大核心 2023年第S01期148-152,共5页
大渡河流域为中国地质灾害高易发区,已经发现地质灾害隐患点多处,当然机遇与危险往往是共存的,大渡河水力理论蕴藏量丰富也逐渐被发现。大渡河两岸地势险要,植被覆盖较厚,人工测量不便、传统测量精度不足,本文以大渡河上某个流域地区的... 大渡河流域为中国地质灾害高易发区,已经发现地质灾害隐患点多处,当然机遇与危险往往是共存的,大渡河水力理论蕴藏量丰富也逐渐被发现。大渡河两岸地势险要,植被覆盖较厚,人工测量不便、传统测量精度不足,本文以大渡河上某个流域地区的引水工程为例,在河道两岸进行正射航测、激光雷达测量等工作。选用飞马V10无人机为基本测绘工具,搭载LiDAR22和CAM10载荷,在有限的时间之内,生产出满足要求的数字产品,为山洪泥石流灾害分析,工程设计等提供基础分析资料。 展开更多
关键词 大渡河 正射 激光雷达
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Microencapsulated tumor assay:Evaluation of the nude mouse model of pancreatic cancer 被引量:1
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作者 Ming-Zhe Ma Dong-Feng Cheng +5 位作者 Jin-Hua Ye Yong Zhou Jia-Xiang Wang Min-Min Shi Bao-San Han Cheng-Hong Peng 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第3期257-267,共11页
AIM: To establish a more stable and accurate nude mouse model of pancreatic cancer using cancer cell microencapsulation. METHODS: The assay is based on microencapsulation technology, wherein human tumor cells are enca... AIM: To establish a more stable and accurate nude mouse model of pancreatic cancer using cancer cell microencapsulation. METHODS: The assay is based on microencapsulation technology, wherein human tumor cells are encapsulated in small microcapsules (approximately 420 μm in diameter) constructed of semipermeable membranes. We implemented two kinds of subcutaneous implantation models in nude mice using the injection of single tumor cells and encapsulated pancreatic tumor cells. The size of subcutaneously implanted tumors was observed ona weekly basis using two methods, and growth curves were generated from these data. The growth and metastasis of orthotopically injected single tumor cells and encapsulated pancreatic tumor cells were evaluated at four and eight weeks postimplantation by positron emission tomography-computed tomography scan and necropsy. The pancreatic tumor samples obtained from each method were then sent for pathological examination. We evaluated differences in the rates of tumor incidence and the presence of metastasis and variations in tumor volume and tumor weight in the cancer microcapsules vs single-cell suspensions. RESULTS: Sequential in vitro observations of the microcapsules showed that the cancer cells in microcapsules proliferated well and formed spheroids at days 4 to 6. Further in vitro culture resulted in bursting of the membrane of the microcapsules and cells deviated outward and continued to grow in flasks. The optimum injection time was found to be 5 d after tumor encapsulation. In the subcutaneous implantation model, there were no significant differences in terms of tumor volume between the encapsulated pancreatic tumor cells and cells alone and rate of tumor incidence. There was a significant difference in the rate of successful im- plantation between the cancer cell microencapsulation group and the single tumor-cell suspension group (100% vs 71.43%, respectively, P = 0.0489) in the orthotropic implantation model. The former method displayed an obvious advantage in tumor mass (4 展开更多
关键词 Nude mice Model of pancreatic neoplasms Encapsulation Subcutaneous implantation model ortho- topic implantation model
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ORGANOMETALLIC FERROELECTRIC LIQUID CRYSTALS Ⅰ. LIQUID CRYSTAL PROPERTIES OF ORTHO—PALLADATED BINUCLEAR COMPLEXES OF AZINE, IMINE AND AZO DERIVATIVES 被引量:1
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作者 Liang Fu ZHANG De Jian HUANG +1 位作者 Nu Yun XIONG Guang Nian LI 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第10期805-806,共2页
The mesomorphie properties of title complexes are investigated by means of DSC and polarizing microscopy. The mesophase temperature ranges of complexes are wider than that of corresponding organic ligands. The bridgin... The mesomorphie properties of title complexes are investigated by means of DSC and polarizing microscopy. The mesophase temperature ranges of complexes are wider than that of corresponding organic ligands. The bridging groups of the complexes have profoand effects on the mesomorphic behavior, When the bridging groups are opticallhy active. the compleve show chiral smectic 展开更多
关键词 AZO CI IMINE AND AZO DERIVATIVES LIQUID CRYSTAL PROPERTIES OF ortho ORGANOMETALLIC FERROELECTRIC LIQUID CRYSTALS PALLADATED BINUCLEAR COMPLEXES OF AZINE than FIC
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N-邻位取代苯基马来酰亚胺的研究概述
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作者 史东明 钱捷 《浙江化工》 CAS 2009年第2期20-24,19,共6页
介绍了N-苯基取代马来酰亚胺的主要应用和制备方法,叙述了邻位苯基取代马来酰亚胺的国内外研究概况,提出应对这类具有特殊性质的单体和聚合物进行更深入的研究。
关键词 马来酰亚胺 苯基 邻位 聚合
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STUDIES ON ORGANOMETALLIC COMPOUNDS OF TITANIUM, ZIRCONIUM AND HAFNIUM
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作者 陈寿山 刘以寅 +1 位作者 玄镇爱 张正之 《Chinese Science Bulletin》 SCIE EI CAS 1980年第1期44-46,共3页
A general formula of the fourth transitional metals (η5-C5H5)2M(σ-Ar)2, where M = Ti(Ⅳ), Zr(Ⅳ), Hf(Ⅳ), was assigned for his (cyclopentadienyl) bis (aryl)metal. In this formula Ar=pheny pentafluoroph... A general formula of the fourth transitional metals (η5-C5H5)2M(σ-Ar)2, where M = Ti(Ⅳ), Zr(Ⅳ), Hf(Ⅳ), was assigned for his (cyclopentadienyl) bis (aryl)metal. In this formula Ar=pheny pentafluorophenyl p-tolyl, m-tolyl have been reported. In a previous communication we have also reported the synthesis of ortho substituted tolyl derivatives of zirconium and hafnium of 展开更多
关键词 transitional ortho assigned substituted ZIRCONIUM TITANIUM DIMETHYLAMINO TETRACHLORIDE fourth hydrolyzed
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