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微信平台下的高中物理“翻转课堂”教学 被引量:1
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作者 李殿臣 《高中数理化》 2015年第16期34-34,共1页
"翻转课堂"利用网络传播的便捷性,为学习者打造了一个他们所需要的学习终端,这是现代教育方法与网络信息发展的一种结合.基于此本文对"翻转课堂"的教学支架与基本流程进行介绍,并结合相应实例进行阐述.1"翻转课堂"的教学支架分析... "翻转课堂"利用网络传播的便捷性,为学习者打造了一个他们所需要的学习终端,这是现代教育方法与网络信息发展的一种结合.基于此本文对"翻转课堂"的教学支架与基本流程进行介绍,并结合相应实例进行阐述.1"翻转课堂"的教学支架分析"翻转课堂"作为一种新型的教学方式,有着新型的教学支架,结合本人的教学经验,总结"翻转课堂"的教学支架设计如下. 展开更多
关键词 高中 超重现象 导入物 细绳 中所 在线视频 导学 竖直方向 力学原因 生活现象
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Preliminary Study on Phosphoenolpyruvate Carboxylase(PEPCase) Gene Introduced into Wheat
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作者 张彬 马建军 贾栋 《Agricultural Science & Technology》 CAS 2009年第2期26-28,共3页
[ Objective] The aim of this study was to introduce Phosphoenolpyruvate Carboxylase (PEPCase) gene into common wheat Linyou 145. [ Method] With the material of common wheat Linyou 145, Phosphoenolpyruvate Carboxyla... [ Objective] The aim of this study was to introduce Phosphoenolpyruvate Carboxylase (PEPCase) gene into common wheat Linyou 145. [ Method] With the material of common wheat Linyou 145, Phosphoenolpyruvate Carboxylase (PEPCase) gene was introduced into wheat embryo callus by the agrobacterium-mediated transformation system, and then analyzed through successive selection with selective medium con- taing gygrornycin to detect the gene at the molecular level. [Result] The hyg-resistant plants were obtained, and GUS histochemical staining showed the leaf of resistant plants was stained dark blue. The target bands appeared in PCR analysis. [ Conclusion] Phosphoenolpyruvate Car- boxylase (PEPCase) gene has been primarily introduced into the recipient material. 展开更多
关键词 WHEAT Phosphoenolpyruvate Carboxylase (PEPCase) gene
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Evaluation of CA125 and NT-proBNP values in patients undergoing transcatheter aortic valve implantation 被引量:5
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作者 Huseyin Ayhan Haca Ahmet Kasapkara +8 位作者 Tahir Durmaz Telat Keles Cenk San Serdal Bastug Kemal Esref Erdogan Nihal Akar Bayram Emine Bilen Murat Akgay Engin Bozkurt 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2015年第2期100-106,共7页
Background Transcatheter aortic valve implantation (TAVI) is a minimally invasive, emerging therapy in surgically high risk, or in- operable patients. Parameters used for risk classification have some deficiencies i... Background Transcatheter aortic valve implantation (TAVI) is a minimally invasive, emerging therapy in surgically high risk, or in- operable patients. Parameters used for risk classification have some deficiencies in the selection of patients. The objective of this study is to evaluate the impact of TAVI on carbohydrate antigen 125 (CA125) and N-terminal pro brain-type natriuretic peptide (NT-proBNP) as biomarkers that have been used frequently in recent years, and also the relationship of these biomarkers to prognosis. Methods & Results Transcatheter aortic valve implantation was practiced on 31 patients in this study. Then, CA125 and NT-proBNP levels studied in patients prior to and after the TAVI were evaluated. The patients were also grouped in accordance with their left ventrieular ejection fraction (LVEF) and CA125 levels (LVEF 〉 40% and 〈 40%; CA125 ≤ 35 U/L and 〉 35 U/L). The TAVI operation was successfully performed in all patients. There was no in-hospital mortality and substantial improvement in functional capacity was detected at follow ups. In addition, a statistically significant decrease was detected in post-TAVI CA 125 and NT-proBNP levels of all patients (CA 125 83.8 ± 18.1 U/L vs. 64.3 ±14.2 U/L, P = 0.008; NT-proBNP: 4633.6± 627.6 pg/mL vs. 2866.3±536.8 pg/mL, P 〈 0.001). In groups divided according to the CA125 levels, there was also statistically significant post-TAVI decline in CA125 levels. Within CA125 〉 35 U/L and LVEF 〈 40% groups, the permanent need for a pacemaker was required in one (3.2%) patient and mortality was observed in two (6.4%) patients after TAVI at follow up. Conclusions The results show that TAVI can be performed effectively and reliably in patients with high baseline levels of CA125 and NT-proBNP. These biomarkers are reduced substantially with TAVI, while high biomarker levels are associated with undesired events, and certainly, these biomarkers can be used for risk classifications in patient selection for TAVI. 展开更多
关键词 B-type natriuretic peptide BIOMARKER Carbohydrate antigen Heart failure Transcatheter aortic valve implantation Risk score
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Influence on Conductivity of Polyparaphenylene by Chemical Doping and Ion Implantation 被引量:1
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作者 WANG Hui, WU Hong-cai (School of Electron. & Inform. Eng., Xi’an Jiaotong University, Xi’an 710049,CHN) 《Semiconductor Photonics and Technology》 CAS 1999年第2期114-118,共5页
Polyparaphenylene(PPP) is prepared by AlCl 3-CuCl 2 catalysts with benzene as the monomer and is doped by chemical method and N + ion implantation. The influences of the concentration, temperature and time of chemi... Polyparaphenylene(PPP) is prepared by AlCl 3-CuCl 2 catalysts with benzene as the monomer and is doped by chemical method and N + ion implantation. The influences of the concentration, temperature and time of chemical doping and the dose, energy and temperature of ion implantation, on PPP conductivity are investigated. The results showed that the conductivity of PPP can be improved 4~5 orders of magnitude by ion implantation and the conductivity of PPP can reach about 0.11 S·cm -1 by chemical doping. The comparison of stability of the material conductive behavior by using the two doping methods is presented. It shows that ion implantation is better than chemical doping in stabilizing the electric conductive behavior for the material. 展开更多
关键词 Conducting Polymers Ion Implantation Polyparaphenylene CLC number:O 631.23 O 632.7 TN304.52 Document code:A
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Transformation of Poplar (Populus)with tPA Gene
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作者 赵淑慧 韩一侬 +2 位作者 李玲 韩一凡 薛国雄 《Developmental and Reproductive Biology》 1994年第2期48-54,共7页
In this study, tPA gene(human tissuetype plasminogen activator gene) was remolded with the leader sequence removed and an artificially synthesized sequence containing the initiator (ATG) added. Using the binary vector... In this study, tPA gene(human tissuetype plasminogen activator gene) was remolded with the leader sequence removed and an artificially synthesized sequence containing the initiator (ATG) added. Using the binary vector strategy,we first inserted the remolded tPA gene into the Ti-derived plasmid, PGA643 and then transferred,in a triparental mating system,the plasmid into a strain of Agrobacterium tumefaciens,A281, that contained vir-DNA.Finally poplar cells were transformed with A. tumefaciens using leaf discus method. The transformed cells were selected in culture containing kanamycin and in siyu hybridization.Successful generation of transgenic poplar was demonstrated by molecular hybridization in the cultivated plants and detection of tPA gene product. 展开更多
关键词 TPA Poplar (Populus) Leaf discus transformation
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