维普中文期刊产品整合服务
130篇 您的检索式:作者名="DARN"
    题名 作者 年代 出处 被引量
1Paleomagnetic data from Early Cretaceous volcanic rocks of West Liaoning:Evidence for intracontinental rotation显示文摘Detailed rock magnetic studies of 55 lavas from Yixian and Fuxin area, West Liaoning, show the primary carriers of remanence to be pseudo-single domain ti-tanomagnetite. K/Ar dating indicates that the volcanic sequence spans 93 to 133 Ma. Stepwise thermal demagnetization successfully isolated well-defined characteristic magnetization (ChRM) in all lavas thermal-treated above 250℃ The mean paleodirections are D/I=5.9°/58.8° (α95 = 2.9°) and D/I =179.2°/-59.9° (α95 = 5.2°) for 27 normally magnetized flows and 28 reversibly magnetized flows, respectively. It indicates that since the Early Cretaceous there is no significant horizontal movement and rotation between the Yixian-Fuxin area and Eurasia. However, Korea Peninsula may have undergone a clockwise rotation of 33.9° relative to the Yixian-Fuxin area during the Cretaceous. On the basis of characteristics of hotspot origins (core-mantle boundary or upper mantle), the clockwise rotation of Korea Peninsula relative to Eurasia is assumed to beZHU Rixiang SHAO Ji’an PAN Yongxin SHI Ruiping SHI Guanghai LI Darning 2002Chinese Science Bulletin2002,47,21:31
2Effects of Sc, Zr and Tion the microstructure and properties of Al alloys with high Mg content显示文摘The effects of trace Sc, Zr, and Ti on the microstructure and hardness of Al alloys with high Mg content (Al-6Mg, Al-8Mg, and Al-10Mg) were studied by optical microscope, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brinell hardness. The grain size of the ascast alloys was refined by the addition of Sc and Zr, and it was further refined by the addition of Ti. With the same contents of Sc, Zr, and Ti, an increase in Mg content was beneficial to the refinement due to the solution of Mg into α-Al. The refined microstructures of the as-cast alloys were favorable for Brinell hardness. Addition of Sc, Zr, and Ti to the Al-10Mg alloy results in the improvement of peak hardness and it is about 45% higher than that of the Al-10Mg alloy, which is due to fine precipitations of Al3(Sc1-xZrx), Al3(Sc1-xTix), and Al3(Sc1-x-yZrxTiy).WANG Xu CHEN Guoqin LI Bing WU Lianmei JIANG Darning 2010Rare Metals2010,29,1:18
3Ubiquitylation of p62/sequestosome1 activates its autophagy receptor function and controls selective autophagy upon ubiquitin stress显示文摘在细胞的 ubiquitin (Ub ) 的改变动态平衡,作为 Ub 知道强调,展示并且影响处于多重条件的细胞的回答,然而,内在的机制不完全地被理解。这里,我们报导 autophagy 受体 p62/sequestosome-1 与结合酶, UBE2D2 和 UBE2D3 的 E2 Ub 交往。内长的 p62 在 Ub 动态平衡的 upregulation 期间经历 E2 依赖的 ubiquitylation,一个条件作为 Ub + 应力称为,那对由 bortezomib 的 Ub overexpression,热吃惊或延长 proteasomal 抑制内在,化学疗法的药。p62 的 Ubiquitylation 破坏 p62 的 UBA 领域的 dimerization,解放它的能力认出为选择 autophagy 的 polyubiquitylated 货物。我们进一步证明这机制可能为在 Ub + 压力条件之上的 autophagy 激活是批评的。机制的描述和在察觉到 Ub 应力并且控制选择 autophagy 的 p62 的规章的角色能帮助理解并且调制细胞的回答到许多内长、环境的挑战,潜在地对 autophagy 相关的病为治疗学的策略的发展打开一条新大街。Hong Peng Jiao Yang Guangyi Li Qing You Wen Han Tianrang Li Darning Gao Xiaoduo Xie Byung-Hoon Lee Juan Du Jian Hou Tao Zhang Hai Rao Ying Huang Qinrun Li Rong Zeng Lijian Hui Hongyan Wang Qin Xia Xuemin Zhang Yongning He Masaaki Komatsu Ivan Dikic Daniel Finley Ronggui Hu 2017Cell Research2017,27,5:9
4K-Ar age of young volcanic rocks and excess argon——Binary mixing model and quantitative study of excess argon effect显示文摘A binary mixing model for excess argon is suggested in the note. According to thismodel and the data of excess argon component obtained in our experiment, a quantitative study of the effect of excess argon on real K-Ar age of young volcanic rocks is done. The result indicates that the effect of 5% excess argon component in samples on K-Ar age of the samples more than 2 Ma is less than 7.36% and can lead K-Ar age of 0.5 Ma samples to increase by 32.4%, while 1% excess argon component leads K-Ar age of 0.5 Ma samples to increase by 6.26%. Therefore, when pre-processed excess argon component is ≤1%, K-Ar age of the samples more than 0.5 Ma should be credible. On this basis we suggest a principal opinion for evaluation of previous K-Ar dating results and propose that the matrix is used to determine K-Ar age of young volcanic rocks. For the samples less than 0.2 Ma, in the case of high excess argon content, even if only 1% excess argon component exists in their matrix, it can also greatly affect their K-ADarning Li Wenji Chen Qi Li 2000Chinese Science Bulletin2000,45,7:4
5Maxillary first premolars:Ⅰ.Morphology of the apical constriction显示文摘Objective: To investigated the apical constriction morphology of maxillary first premolars in the Chinese population. Methods: Eighty recently extracted human maxillary first premolars from a native Chinese population were used. The number and shape of apical constrictions were recorded under a dental operating microscope (DOM) at 12.5×2.5 magnification. After access preparation, a new K-file was inserted into the canal until the tip of the file was just seen at the apical constriction under the DOM. The teeth with files in the canals were X-rayed from a mesiodistal direction using a direct digital radiography (DDR) system, and the distance between the file tip and the center of radiographic apex was directly measured from the computer screen using DDR measurement software. Results: The percentage of teeth with an apical constriction was 78.5% (102/130). The most common apical constriction shapes were oval (55.9%) and round (35.3%). The mean distance between the apical constriction and the anatomical tip of the root was 0.61 mm, and 84.3% (86/102) were within 1 mm. Conclusion: The most common shape of an apical constriction was oval or round, and the distance to the apex was mostly within 1 mm, indicating that root canal therapy should stop 1 mm from the radiographic apex.Darning Wu Younong Wu Ming Hu 2009Journal of Nanjing Medical University2009,23,6:3
6MicroRNA-150 aggravates H2O2-induced cardiac myocyte injury by down-regulating c-myb gene显示文摘MicroRNAs (miRNAs ) 是经由降级或他们的目标基因的翻译抑制在 post-transcriptional 规定起一个重要作用的非编码的 RNA 的一个班。MicroRNA-150 (miR-150 ) 在调整 B 和 T 淋巴细胞的发展起一个重要作用。尽管 miR-150 的 dysregulation 在人的心肌的梗塞被证实,很少响应反应的氧种类(ROS ) 关于 miR-150 的生物功能被知道在心脏的 myocytes 的调停的基因规定。用量的即时反向的抄写聚合酶链反应,我们证明 miR-150 的水平在在有氢过氧化物(H2O2 ) 的治疗以后的心脏的 myocytes 是起来调整的。在调停 H2O2 的基因规定识别 miR-150 的潜在的角色,我们调制了表示用 miR-150 禁止者的 miR-150 和 miR-150 模仿。结果证明 miR-150 的那 silencing 表情减少了导致 H2O2 的心脏的房间死亡和 apoptosis。在淋巴细胞, c-myb 是 miR-150 的一个直接目标。在心脏的 myocytes,我们发现 c-myb 也涉及 miR-150-mediated 导致 H2O2 的心脏的房间死亡。这些结果建议 miR-150 在心脏的 myocytes 参予调停 H2O2 的基因规定和功能的调整。MiR-150 可以在与 ROS 有关的心疾病起一个必要作用,例如心脏的肥大,心失败,心肌的梗塞,和心肌的 ischemia/reperfusion 损害。Xuebiao Li Minjian Kong Darning Jiang Jianfang Qian Qunjun Duan Aiqiang Dong 2013Acta Biochimica et Biophysica Sinica2013,45,9:3
7EFFECT OF LASER SCANNING SPEED ON PHASE CONSTITUTION AND WEAR RESISTANCE OF LASER CLADDING HARD FACING ALLOY STELLITE 12显示文摘Effect of laser scanning speed on phase constitution,microstructure,microhardness and wearresistance of laser-cladding hard facing alloy Stellite 12 has been investigated by means of across-flow-type CO2 laser of 1.5 kW.The laser-cladding layer on the alloy consists of ma-trix phase of suppersaturated solid solution γ(Co,Cr)and complex hexagonal carbideM7C3.Under certain condition,at higher laser scanning speed,the suppersaturated solubilityof elements increases in γ(Co,Cr),and the precipitation of the complex carbtde M7C3 de-creases,so the microhardness increases and the wear resistance decreases.But at slower laserscanning speed,more complex carbide M7C3 may precipitate,and the wear resistance may beimproved.Therefore,it is believed that the principal factor in improving wear resistance is theprecipitation of carbide M7C3,while increment of microhardness is the suppersaturated solu-bility of elements in matrix phase γ(Co,Cr).XU Yourong ZHANG Henghua CHEN Darning XIE Fuchun XU Mingyu Shanghai University of Science and Technology,Shanghai,ChinaCHEN Lanying SU Baorong QIAN Hongbin Shanghai Optics and Fine Mechinery Research Institute,Academia Sinica,Shanghai,China XU Yourong,professor,Department of Materials Science and Engineering,Shanghai University of Science and Technology,Shanghai 201800,China 1993Acta Metallurgica Sinica(English Letters)1993,6,5:3
8Expression, purification of a synthetic fuse-protein-TSF from PF4 and TSP1 fragments and its effect on angio-genesis and tumor growth显示文摘Sequences encoding PF4 (58-70) and TSP1 (429-459) were linked to yield a single gene TSF which encodes the fuse-protein of TSF. The gene was cloned into a pGEX-2T expression vector to generate a protein GST-TSF, which was strongly expressed in E. coli. The purified GST-TSF was degraded with thrombin to generate the protein TSF. With the methods of MTT and wound repair assay, the effects of TSF on the proliferation and migration of EC were detected, respectively. The results showed that TSF significantly suppressed BAEC proliferation and migration in a dose-dependent manner. The fuse protein GST-TSF, and the peptides PF4 (58-70) and TSP1 (429-459) also inhibited BAEC proliferation and migration, respectively, but their inhibition rates were not as high as TSF. Using the CAM assay, it was shown that TSF, GST-TSF, PF4 (58-70) and TSP1 (429-459) inhibited angiogenesis in chick CAM potentially, the effect of TSF was the highest. In vivo, the growth of Lewis lung carcinoma was potently inhibited by TSFSHEN Xianrong JI Dongmei HU Youqing JIA Fuxing DENG Xinxian WANG Ling CHU Zhiyong JIANG Dingwen LEI Chengxiang HUANG Jiansheng HU Xinran REN Darning 2001Chinese Science Bulletin2001,46,24:2
9A comparison between radiovisiography and clearing technique in the study of the root canal types显示文摘Objective: To compare the radiovisiography (RVG) with the clearing technique using Kappa value in the study of the root canal types. Methods: One hundred recently extracted human maxillary first premolars were used. Standard periapical RVG images were taken from a buccolingual and mesiodistal direction. The specimens were then accessed, injected with ink, demineralized, dehydrated, and finally were cleared. The RVG images and the transparent teeth were examined by a trained endodontist, and the date of root canal types following Wu’s classification was collected. Results: The reliability of RVG was high for studies on simple root canals, but was poor for the studies on the multiple root canals. The Kappa value between the two techniques was 0.3793, indicating the agreement was poor. Conclusion: It is concluded that the limited value of RVG alone when studying certain aspect of the root canal system. The resolution of the RVG system should be enhanced.Darning Wu Younong Wu 2005Journal of Nanjing Medical University2005,19,6:2
10Evaluation of the clinical efficacy of the 1,450 nm la in a ulgaris:a randomized split-face,investigator-blinded clini-cal trial显示文摘Darne S Hiscutt EL Seukeran DC 2011Br J Dermatol2011,165,6:1
11Turning liabilities into resources:informal village doctors and tuberculosis control in Bangladesh显示文摘 Uplekar M Darn P 2006Bulletin of the world Health Organization2006,84,6:1
12Serum uric acid in relation to age and physique in health and in coronary heart disease显示文摘Gertler MM Darn SM Levine SA 1951Ann Intern Med1951,34,6:1
13General sequential imperfect preventive maintenance models 显示文摘Darning Lin Zuo Ming J Yam Richard C M 2000International Journal of Reliability Quality and Safety Engineering2000,7,3:1
14Sequential imperfect pre- ventive maintenance models with two categories of failure modes显示文摘LIN Darning ZUO M J YAM R 2001Naval Research Logistics2001,48,2:1
15In situ bubble stretching dispersion mechanism for additives in polymers 显示文摘Wu Darning Meng Qingyun Liu Ying 2003Polymer Science ( Part B ) : Polymer Physics2003,41,:1
16Solids conveying in extruders显示文摘Darne|l W H Mol E A J 1956SPE1956,12,:1
17Blood Pressure Outcome of Angioplasty in Atherosclerotic Renal Artery Stenosis&: A Randomized Trial.显示文摘Pierre-Francois Plouin Gilles Chatellier Bernadette Darne Alain Raynaud 1998Hypertension1998,,3:1
18Market efficiency in the European carbon markets 显示文摘CharlesAm61ie Darn~ Olivier 2013Energy Policy2013,,60:1
19Analysis of nanogranule dispersion using the ISBS method显示文摘Meng Qingyun Zheng Xiuting Wu Darning 2007The European Physical JournalApplied Physics2007,38,:1
20Numerical method for solution of strongly coupled binary alloy solidification problems 显示文摘XU Darning LI Qingchun 1991Numerical Heat Transfer Part A1991,20,2:1
返回顶部 每页显示:
共7页 首页 上一页 第1页 下一页 末页 /7 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费