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1796篇 您的检索式:作者名="Ren R"
    题名 作者 年代 出处 被引量
1Transrectal ultrasound and magnetic resonance imaging measurement of extramural tumor spread in rectal cancer显示文摘AIM:To evaluate the agreement between transrectal ultrasound(TRUS) and magnetic resonance imaging(MRI) in classification of ≥ T3 rectal tumors.METHODS:From January 2010 to January 2012,86 consecutive patients with ≥ T3 tumors were included in this study.The mean age of the patients was 66.4 years(range:26-91 years).The tumors were all ≥ T3 on TRUS.The sub-classification was defined by the penetration of the rectal wall:a:0 to 1 mm;b:1-5 mm;c:6-15;d:> 15 mm.Early tumors as ab(≤ 5 mm) and advanced tumors as cd(> 5 mm).All patients underwent TRUS using a 6.5 MHz transrectal transducer.The MRI was performed with a 1.5 T Philips unit.The TRUS findings were blinded to the radiologist performing the interpretation of the MRI images and measuring the depth of extramural tumor spread.RESULTS:TRUS found 51 patients to have an early ≥ T3 tumors and 35 to have an advanced tumor,whereas MRI categorized 48 as early ≥ T3 tumors and 38 as advanced tumors.No patients with tumors classified as advanced by TRUS were found to be early on MRI.The kappa value in classifying early versus advanced T3 rectal tumors was 0.93(95% CI:0.85-1.00).We found a kappa value of 0.74(95% CI:0.63-0.86) for the total sub-classification between the two methods.The mean maximal tumor outgrowth measured by TRUS,5.5 mm ± 5.63 mm and on MRI,6.3 mm ± 6.18 mm,P = 0.004.In 19 of the 86 patients the following CT scan or surgery revealed distant metastases;of the 51 patients in the ultrasound ab group three(5.9%) had metastases,whereas 16(45.7%) of 35 in the cd group harbored distant metastases,P = 0.00002.The odds ratio of having distant metastases in the ultrasound cd group compared to the ab group was 13.5(95% CI:3.5-51.6),P = 0.00002.The mean maximal ultrasound measured outgrowth was 4.3 mm(95% CI:3.2-5.5 mm) in patients without distant metastases,while the mean maximal outgrowth was 9.5 mm(95% CI:6.2-12.8 mm) in the patients with metastases,P = 0.00004.Using the MRI classification three(6.3%) of 48 in the MRI ab group had distant metastases,while 16(42.1%) of the 38 in the MRI cd group,P = 0.00004.The MRI odds ratio was 10.9(95% CI:2.9-41.4),P = 0.00008.The mean maximal MRI measured outgrowth was 4.9 mm(95% CI:3.7-6.1 mm) in patients without distant metastases,while the mean maximal outgrowth was 11.5 mm(95% CI:7.8-15.2 mm) in the patients with metastases,P = 0.000006.CONCLUSION:There is good agreement between TRUS and MRI in the pretreatment sub-classification of ≥ T3 tumors.Distant metastases are more frequent in the advanced group.Sφren R Rafaelsen Chris Vagn-Hansen Torben Sφrensen John Plφen Anders Jakobsen 2012World Journal of Gastroenterology2012,18,36:14
2Tumor necrosis factor-α inhibitor therapy and fetal risk:A systematic literature review显示文摘Tumor necrosis factor-α inhibitors (anti-TNFs) are effective in the treatment of inflammatory bowel disease (IBD) recalcitrant to conventional medical therapy. As the peak incidence of IBD overlaps with the prime reproductive years, it is crucial to establish pharmacologic regimens for women of childbearing age that achieve effective disease control without posing significant fetal harm. A systematic literature review was performed to identify all human studies with birth outcomes data after maternal exposure to infliximab, adalimumab, or certolizumab pegol within 3 mo of conception or during any trimester of pregnancy. Live births, spontaneous abortions or stillbirths, preterm or premature births, low birth weight or small for gestational age infants, and congenital abnormalities were recorded. Fifty selected references identified 472 pregnancy exposures. The subsequent review includes general information regarding anti-TNF therapy in pregnancy followed by a summary of our findings. The benefits of biologic modalities in optimizing disease control during pregnancy must be weighed against the potential toxicity of drug exposure on the developing fetus. Although promising overall, there is insufficient evidence to prove absolute safety for use of anti-TNFs during pregnancy given the limitations of available data and lack of controlled trials.Renée M Marchioni Gary R Lichtenstein 2013World Journal of Gastroenterology2013,19,17:11
3Voltage regulation in LV grids by coordinated volt-var control strategies显示文摘The increasing penetration level of photovoltaic(PV)power generation in low voltage(LV)networks results in voltage rise issues,particularly at the end of the feeders.In order to mitigate this problem,several strategies,such as grid reinforcement,transformer tap change,demand-side management,active power curtailment,and reactive power optimization methods,show their contribution to voltage support,yet still limited.This paper proposes a coordinated volt-var control architecture between the LV distribution transformer and solar inverters to optimize the PV power penetration level in a representative LV network in Bornholm Island using a multi-objective genetic algorithm.The approach is to increase the reactive power contribution of the inverters closest to the transformer during overvoltage conditions.Two standard reactive power control concepts,cosu(P)and Q(U),are simulated and compared in terms of network power losses and voltage level along the feeder.As a practical implementation,a reconfigurable hardware is used for developing a testing platform based on real-time measurements to regulate the reactive power level.The proposed testing platform has been developed within PVNET.dk project,which targets to study the approaches for large PV power integration into the network,without the need of reinforcement.Miguel JUAMPEREZ Guangya YANG Søren Bækhøj KJÆR 2014Journal of Modern Power Systems and Clean Energy2014,2,4:10
4Impaired contractility and remodeling of the upper gastrointestinal tract in diabetes mellitus type-1显示文摘AIM: To investigate that both the neuronal function of the contractile system and structural apparatus of the gastrointestinal tract are affected in patients with longstanding diabetes and auto mic neuropathy. METHODS: The evoked esophageal and duodenal contractile activity to standardized bag distension was assessed using a specialized ultrasound-based probe. Twelve type-1 diabetic patients with autonomic neuropathy and severe gastrointestinal symptoms and 12 healthy controls were studied. The geometry and biomechanical parameters (strain, tension/stress, and stiffness) were assessed. RESULTS: The diabetic patients had increased frequency of distension-induced contractions (6.0 ± 0.6 vs 3.3 ± 0.5, P < 0.001). This increased reactivity was correlated with the duration of the disease (P = 0.009). Impaired coordination of the contractile activity in diabetic patients was demonstrated as imbalance between the time required to evoke the first contraction at the distension site and proximal to it (1.5 ± 0.6 vs 0.5 ± 0.1, P = 0.03). The esophageal wall and especially the mucosa-submucosa layer had increased thickness in the patients (P < 0.001), and the longitudinal and radial compressive stretch was less in diabetics (P <0.001). The esophageal and duodenal wall stiffness and circumferential deformation induced by the distensions were not affected in the patients (all P > 0.14). CONCLUSION: The impaired contractile activity with an imbalance in the distension-induced contractions likely reflects neuronal abnormalities due to autonomic neuropathy. However, structural changes and remodeling of the gastrointestinal tract are also evident and may add to the neuronal changes. This may contribute to the pathophysiology of diabetic gut dysfunction and impact on future management of diabetic patients with gastrointestinal symptoms.Jens BrΦndum FrΦkjΦr SΦren Due Andersen Niels EjskjΦr Peter Funch-Jensen AsbjΦrn Mohr Drewes Hans Gregersen 2007World Journal of Gastroenterology2007,13,36:8
5The role of Src homology 2 containing protein tyrosine phosphatase 2 in vascular smooth muscle cell migration and proliferation显示文摘脉管的光滑的肌肉房间(VSMC ) 在生理、病理学的条件下面包括移植,区别和增长执行可收缩的必要光滑的肌肉和合成功能。响应病理学的刺激, VMSC 经历 phenotypic 变化导致反常移植和增长,它可以贡献鈥減a 象 thogenesis 一样鈥 ? 动脉粥样硬化。管理这个 phenotypic 开关的细胞内部的发信号机制不仅为动脉粥样硬化患者匾形成的更好的理解而且为为恰当的治疗学的疗法的策略意义大。(SHP2 ) Src 相同 2 包含的蛋白质酷氨酸磷酸酶 2 是包含响应各种各样的生长因素,荷尔蒙或 cytokines 玩主要生物函数的 Src 相同 2 域的无所不在的酷氨酸磷酸酶。特别地, SHP2 在表明控制房间周期前进,生长和移植的小径的房间被含有。在这评论,我们将主要讨论在 VSMC 移植和增长表明 SHP2 的角色的最近的文学。Machender R KANDADI Matthew S STRATION Jun REN 2010Acta Pharmacologica Sinica2010,31,10:7
6A draft sequence of the rice (Oryza sativa ssp. indica) genome显示文摘The sequence of the rice genome holds fundamental information for its biology, including physiology, genetics, development, and evolution, as well as information on many beneficial phenotypes of economic significance. Using a 'whole genome shotgun' approach, we have pro-duced a draft rice genome sequence of Oryza sativa ssp. in-dica, the major crop rice subspecies in China and many other regions of Asia. The draft genome sequence is constructed from over 4.3 million successful sequencing traces with an accumulative total length of 2214.9 Mb. The initial assembly of the non-redundant sequences reached 409.76 Mb in length, based on 3.30 million successful sequencing traces with a total length of 1797.4 Mb from an indica variant cultivar 93-11, giving an estimated coverage of 95.29% of the rice genome with an average base accuracy of higher than 99%. The coverage of the draft sequence, the randomness of the sequence distribution, and the consistency of BIG-ASSEM-BLER, a custom-designed software packageYU Jun, HU Songnian, WANG Jun,LI Songgang WONG Ka-Shu Gane, LIU Bin,DENG Yajun, DAI Li, ZHOU Yan,ZHANG Xiuqing, CAO Mengliang, LIU Jing,SUN Jiandong , TANG Jiabin, CHEN Yanjiong,HUANG Xiaobing, LIN Wei, YE Chen, TONG Wei,CONG Lijuan, GENG Jianing, HAN Yujun, LI Lin,LI Wei, HU Guangqiang, HUANG Xiangang,LI Wenjie, LI Jian, LIU Zhanwei, LI Long,LIU Jianping, Ql Qiuhui, LIU Jinsong, LI Li,WANG Xuegang, LU Hong, WU Tingling,ZHU Miao, Nl Peixiang, HAN Hua, DONG Wei,REN Xiaoyu, FENG Xiaoli, GUI Peng,LI Xianran, WANG Hao, XU Xin, ZHAI Wenxue,XU Zhao, ZHANG Jinsong, HE Sijie,ZHANG Jianguo, XU Jichen, ZHANG Kunlin,ZHENG Xianwu, DONG Jianhai, ZENG Wanyong,TAO Lin, CHEN Xuewei, HE Jun, LIU Daofeng,TIAN Wei, TIAN Chaoguang, XIA Hongai,LI Gang, GAO Hui, LI Ping, CHEN Wei ,WANG Xudong, ZHANG Yong, HU Jianfei,WANG Jing, LIU Song, YANG Jian,ZHANG Guangyu, XIONG Yuqing, LI Zhijie,MAO Long, ZHOU Chengshu, ZHU Zhen,CHEN Runsheng, HAO Bailin,ZHENG Weimou, CHEN Shouyi, QUO Wei,LI Guojie, LIU Siqi, HUANG Guyang,TAO Ming, WANG Jian, ZHU Lihuang,YUAN Longping& YANG HuanmingBeijing Genomics Institute/Center of Genomics & Bioinformatics, Chinese Academy of Sciences, Beijing 101300, China Hangzhou Genomics Institute/Institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province, Hangzhou 310007, China Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China National Hybrid Rice R & D Center, Changsha 410125, China Laboratory of Bioinformatics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China College of Life Sciences, Peking University, Beijing 100871, China Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 1Q0080, China Digital China Ltd., Beijing 100080, China Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China Medical College, Xi’an Jiaotong University, Xi’an 710061, ChinaThese authors contributed equally to this work.Corresponding author.Corresponden 2001Chinese Science Bulletin2001,46,23:6
7Dynamic chromatin states in human ES cells reveal potential regulatory sequences and genes involved in pluripotency显示文摘Pluripotency,一个细胞的能力区分并且产生所有胚胎的系,定义象胚胎的茎(ES ) 那样的哺乳动物的细胞类型的一个小数字细胞。当它通常被保持了时,那 pluripotency 是 transcriptional 的产品激活并且维持关键干细胞基因的表达式的规章的网络,积累的证据在建立并且保卫 ES 房间的 pluripotency 为 epigenetic 进程正在指向一个关键角色,象维持区分的房间类型的身份一样。以便更好在 pluripotency 理解 epigenetic 机制的角色,我们检验了在经历区别进一个 mesendodermal 系的人的 ES 房间(hESCs ) 染色体宽的染色质修正的动力学。我们发现在倡导者的染色质修正在区别期间仍然保持大部分不变,除了在在在 H3K27 的 acetylation 和 methylation 之间的一个动态开关标记在基因表示的激活和 silencing 之间的转变的倡导者的一个小数字,建议在在大多数差别上的房间命运承诺的一个层次表示了基因。我们也在 50 000 潜在的 enhancers 上印射,并且在染色质修正,特别 H3K4me1 和 H3K27ac 观察了大得多的动力学,它与他们的潜在的目标基因的表示相关。这些 enhancers 的进一步的分析揭示了 pluripotency 和可以在 hESCs 授与发展胜任的一个平衡状态的一口染色质签名陈述语气的潜在地关键的 transcriptional 管理者。我们的结果提供在定义 enhancers 和 pluripotency 支持染色质修正的角色的新证据。R David Hawkins Gary C Hon Chuhu Yang Jessica E Antosiewicz-Bourget Leonard K Lee Que-Minh Ngo Sarit Klugman Keith A Ching Lee E Edsall Zhen Ye Samantha Kuan Pengzhi Yu Hui Liu Xinmin Zhang Roland D Green Victor V Lobanenkov Ron Stewart James A Thomson Bing Ren 2011Cell Research2011,21,10:6
8Pain and chronic pancreatitis: A complex interplay of multiple mechanisms显示文摘Despite multiple theories on the pathogenesis of pain in chronic pancreatitis,no uniform and consistently successful treatment strategy exists and abdominal pain still remains the dominating symptom for most patients and a major challenge for clinicians.Traditional theories focussed on a mechanical cause of pain related to anatomical changes and evidence of increased ductal and interstitial pressures.These observations form the basis for surgical and endoscopic drainage procedures,but the outcome is variable and often unsatisfactory.This underscores the fact that other factors must contribute to pathogenesis of pain,and has shifted the focus towards a more complex neurobiological understanding of pain generation.Amongst other explanations for pain,experimental and human studies have provided evidence that pain perception at the peripheral level and central pain processing of the nociceptive information is altered in patients with chronic pancreatitis,and resembles that seen in neuropathic and chronic pain disorders.However,pain due to e.g.,complications to the disease and adverse effects to treatment must not be overlooked as an additional source of pain.This review outlines the current theories on pain generation in chronic pancreatitis which is crucial in order to understand the complexity and limitations of current therapeutic approaches.Furthermore,it may also serve as an inspiration for further research and development of methods that can evaluate the relative contribution and interplay of different pain mechanisms in the individual patients,before they are subjected to more or less empirical treatment.Jakob Lykke Poulsen Sφren Schou Olesen Lasse Paludan Malver Jens Brφndum Frφkjr Asbjφrn Mohr Drewes 2013World Journal of Gastroenterology2013,19,42:5
9Voltage rise mitigation for solar PV integration at LV grids Studies from PVNET.dk显示文摘Solar energy from photovoltaic(PV)is among the fastest developing renewable energy systems worldwide.Driven by governmental subsidies and technological development,Europe has seen a fast expansion of solar PV in the last few years.Among the installed PV plants,most of them are situated at the distribution systems and bring various operational challenges such as power quality and power flow management.The paper discusses the modelling requirements for PV system integration studies,as well as the possible techniques for voltage rise mitigation at low voltage(LV)grids for increasing PV penetration.Potential solutions are listed and preliminary results are presented.Guangya YANG Francesco MARRA Miguel JUAMPEREZ Søren Bækhøj KJÆR Seyedmostafa HASHEMI JacobØSTERGAARD Hans Henrik IPSEN Kenn H.B.FREDERIKSEN 2015Journal of Modern Power Systems and Clean Energy2015,3,3:5
10Viral evasion of DNA-stimulated innate immune responses显示文摘导出病毒的 nucleic 酸的细胞的察觉到为对病毒感染的早防卫是必要的。在最近的年里,包括周期的 GMP 安培 synthase (cGAS ) 和 gamma-interferon-inducible 蛋白质(IFI16 ) ,察觉到蛋白质的 DNA 的发现导致了房间怎么对带 DNA 染色体的到来的病原体唤起强壮的天生的有免疫力的回答的理解。发信号由 DNA 传感器刺激了取决于适配器蛋白质圈套(干扰素基因的激发器) ,到启用抗病毒的蛋白质的表示,包括类型我干扰素。便于有效感染,病毒发展了大量避免策略,指向的主人 DNA 传感器,适配器蛋白质和抄写因素。在这评论, STING 小径的导致病毒的激活上的当前的文学被介绍,我们讨论在这条抗病毒的小径指向不同的步的最近识别的病毒的避免机制。Maria H Christensen Sфren R Paludan 2017Cellular & Molecular Immunology2017,14,1:4
11Synthesis, Crystal Structure and Calculated β Value of a Tetrahedral Zinc (II) Complex——Zn(2-NH_2py)_2Br_2显示文摘A new zinc(II) complex, Zn(2-NH2py)2Br2 (py=pyridine), has been synthesized, and its molecular structure has been confirmed by IR, elemental analysis and -ray crystal structure analysis. Its space group is P21/n with Mr=413.43 (C10H12Br2N4Zn), a=7.435(2), b=12.865(3), c=14.186(4)? b=94.08(2)? V=1353.5(5) 3, Z=4, Dc=2.029 g/cm3, F(000)=328, ?2.378mm-1, R=0.0283, wR=0.0501. The total observed reflections with I≥2?I) were 5314, of which the independent reflections were 3106. The complex structure contains a distorted tetrahedron formed by four atoms coordinated to zinc atom, namely two bromide atoms and two nitrogen atoms. The two ZnBr bond lengths within one molecule, 2.3763(6) and 2.4002(5)? respectively, are not equal; and so are the two ZnN bond lengths, which are 2.031(2) and 2.044(2)?respectively. The calculation results using PM3 method through MOPAC software package in Chem 3D show that its first molecular hyperpolarizability b value is 5.210-30esu, which is comparable with that of p-nitroaniline. No bulk SHG effect has been detected due to the centrosymmetric space group.REN Peng a SU Nan-Bing a QIN Jin-Gui a Michael W. Day b CHEN Chuang-Tianc ( aDepartment of Chemistry, Wuhan University, Wuhan 43007, China) ( bBeckman Institute, California Institute of Technology, Pasadena, CA91125, USAQ ) ( cBeijing R & D Center 2002Chinese Journal of Structural Chemistry2002,21,1:3
12Stable suppression of tumorigenicity by virus-mediated RNA interference显示文摘Thijn R Brummelkamp René Bernards Reuven Agami 2002Cancer Cell2002,,3:2
13生理过度觉醒相关失眠增加高血压风险显示文摘先前的研究显示,失眠和客观睡眠时间过短与高血压风险增加相关,并推测其潜在的机制是生理过度觉醒。在该研究中,研究者通过多次睡眠潜伏期试验(multiplesleeplatencytest,MSLT)——一种睡眠/觉醒的标准测试,探讨与生理过度觉醒相关的失眠是否与高血压风险增加相关。Li Y Vgontzas AN Fernandez-Mendoza J Bixler EO Sun Y Zhou J Ren R Li T Tang X 戴伦 练桂丽 2015中华高血压杂志2015,23,2:2
14Hepatic Resection for Noncolorectal Nonendocrine Liver Metastases: Analysis of 1452 Patients and Development of a Prognostic Model显示文摘René Adam Laurence Chiche Thomas Aloia Dominique Elias Rémy Salmon Michel Rivoire Daniel Jaeck Jean Saric Yves Patrice Le Treut Jacques Belghiti Georges Mantion Gilles Mentha 2006Annals of Surgery2006,,4:2
15Bank CEO incentives and the credit crisis显示文摘Rüdiger Fahlenbrach René M. Stulz 2010Journal of Financial Economics2010,,1:2
16Chromatin-bound NLS proteins recruit membrane vesicles and nucleoporins for nuclear envelope assembly via importin-α/β显示文摘Quanlong Lu Zhigang Lu Qinying Liu Li Guo He Ren Jingyan Fu Qing Jiang Paul R Clarke Chuanmao Zhang 2012Cell Research2012,22,11:2
17Rapid, high throughput prenatal detection ofaneuploidy using a novel quantitative method (MLPA) 显示文摘Slater H R Bruno D L Ren H at al 2003J Med Genet2003,40,12:1
18The dependency of microstructure and properties of nanostructured coatings on plasma spray conditions 显示文摘Shaw L L Goberman D Ren R 2000Surf Coat Technol2000,130,:1
19Callus induction and culture of Dioscorea zingiberenwsis 显示文摘Ren J W Bai Y Zhang R C 1993China J Chin Mater Med1993,28,9:1
20Identities and relationships among Chinese vegetable brassicas as determined by random amplified polymorphic DNA marders显示文摘Jianping Ren James R McFerson 1995J Amer Soc Hort Sci1995,120,3:1
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