|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 一种白僵菌代谢产物中生物活性物质的研究 Ⅰ.具有清除自由基的活性物质的分离和制备显示文摘通过对白僵菌 Beauveria sp. 的液体培养及生物活性测定,发现该菌代谢产物具有较强的清除自由基的活性,我们用甲醇成功地提取出该活性成分,同时用色谱等方法对该活性成分进行了分离和制备,并用高压液相色谱法和DPPH薄层试验对其纯度及活性进行了检验,得到了具消除自由基活性的纯化合物:P-24-3。 | 胡丰林 樊美珍 李增智 Mathias HAMBURGER Karen SCHMIDT Schubert BARBARA | 2000 | 菌物系统2000，19，4： | 38 |
| 2 | Alveolar echinococcosis-spreading disease challenging clinicians: A case report and literature review显示文摘Human alveolar echinococcosis (AE) is a potentially deadly disease; recent studies have shown that the endemic area of Echinococcus multilocularis , its causative agent, is larger than previously known. This disease has low prevalence and remains underreported in Europe. Emerging clinical data show that diagnostic difficulties are still common. We report on a 76-year old patient suffering from AE lesions restricted to the left lobe of the liver who underwent a curative extended left hemihepatectomy. Prior to the resection a liver biopsy under the suspicion of an atypical malignancy was performed. After the intervention he developed a pseudoaneurysm of the hepatic artery that was successfully coiled. Surprisingly, during surgery, the macroscopic appearance of the tumour revealed a growth pattern that was rather typical for cystic echinococcosis (CE), i.e. , a gross tumour composed of multiple large vesicles with several centimeters in diameter. In addition, there were neither extensive adhesions nor infiltrations of the neighboring pancreas and diaphragm as was expected from previous imaging results. The unexpected diagnosis of AE was confirmed by definite histopathology, specific polymerase chain reaction and serology results. This is a rare case of unusual macroscopic presentation of AE that posed immense diagnostic challenges and had an eventful course. To our knowledge this is the first case of an autochthonous infection in this particular geographic area of Germany, the federal state of Saxony. This report may provide new hints for an expanding area of risk for AE and emphasizes the risk of complications in the scope of diagnostic procedures and the limitations of modern radiological imaging. | Georgi Atanasov Christoph Benckert Armin Thelen Dennis Tappe Matthias Frosch Dieter Teichmann Thomas FE Barth Christian Wittekind Stefan Schubert Sven Jonas | 2013 | World Journal of Gastroenterology2013，19，26： | 14 |
| 3 | 超细硬质合金混合料的制备与制粒技术显示文摘超细硬质合金因为具有较好的综合性能 ,其应用领域正在不断扩大 ,因此超细硬质合金的研究是当前硬质合金研究领域的一大热点。原料、工艺与设备是超细硬质合金制备过程中的三个关键点 ,如果没有较好地解决超细硬质合金制备过程中的工艺问题 ,即使采用最先进的设备也无法生产出性能优异的合金。本文介绍了作者新近开发的超细硬质合金混合料的制备与制粒技术 ,采用这种技术可以制备平均粒度小于 0 .3mm的球形料粒 ,而且成球率大于 90 %,因而较好地解决了超细硬质合金混合料的模压成形问题。 | 张立 Schubert W.D. 黄伯云 | 2003 | 硬质合金2003，20，3： | 12 |
| 4 | Overcoming the fundamental light-extraction efficiency limitations of deep ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission显示文摘While the demand for deep ultraviolet(DUV)light sources is rapidly growing,the efficiency of current AlGaN-based DUV light-emitting diodes(LEDs)remains very low due to their fundamentally limited light-extraction efficiency(LEE),calling for a novel LEE-enhancing approach to deliver a real breakthrough.Here,we propose sidewall emission-enhanced(SEE)DUV LEDs having multiple light-emitting mesa stripes to utilize inherently strong transverse-magnetic polarized light from the AlGaN active region and three-dimensional reflectors between the stripes.The SEE DUV LEDs show much enhanced light output power with a strongly upward-directed emission due to the exposed sidewall of the active region and Al-coated selective-area-grown n-type GaN micro-reflectors.The devices also show reduced operating voltage due to better n-type ohmic contact formed on the regrown n-GaN stripes when compared with conventional LEDs.Accordingly,the proposed approach simultaneously improves optical and electrical properties.In addition,strategies to further enhance the LEE up to the theoretical optimum value and control emission directionality are discussed. | Dong Yeong Kim Jun Hyuk Park Jong Won Lee Sunyong Hwang Seung Jae Oh Jungsub Kim Cheolsoo Sone EFred Schubert Jong Kyu Kim | 2015 | Light(Science & Applications)2015，4，1： | 6 |
| 5 | 稀土在硬质合金球形粉末烧结体表面的富集现象显示文摘采用合金粉末烧结体表面观察法研究了稀土在WC Co硬质合金中的作用机理。合金中的稀土分别以混合稀土(以La和Ce为主体成分) Co预合金粉形式和La(NO3)3的丙酮溶液形式在湿磨时直接加入。用扫描电镜和能谱仪对平均粒径小于200μm的2种球形稀土硬质合金粉末烧结体表面进行了观察与分析。研究结果表明:当以混合稀土 Co预合金粉形式加入稀土时,在烧结过程中,合金中的稀土La和Ce在合金粉末烧结体表面产生明显的富集,并与主要来自于烧结炉内气氛中的杂质元素形成了含La,Ce,S,Ca,W,C和O的复杂化合物;当以La(NO3)3形式加入稀土时,在合金粉末烧结体表面不存在La的富集或聚集。稀土的添加形式同时也影响合金粉末烧结体表面硬质相WC与粘结相的比例,当以混合稀土 Co预合金粉末形式加入稀土时,合金粉末烧结体表面粘结相含量较少。因此,稀土的添加形式影响其在硬质合金中的作用机理,当以混合稀土 Co预合金粉形式加入稀土时,合金中的稀土不但具有较强的富集杂质元素的作用,而且还可以阻止合金粉末烧结体表面富粘结相结构的形成。 | 张立 黄伯云 陈述 SCHUBERT W D | 2004 | 中南大学学报(自然科学版)2004，35，5： | 6 |
| 6 | What every gastroenterologist needs to know about common anorectal disorders显示文摘Anorectal complaints are very common and are caused by a variety of mostly benign anorectal disorders.Many anorectal conditions may be successfully treated by primary care physicians in the outpatient setting,but patients tend not to seek medical attention due to embarrassment or fear of cancer.As a result,patients frequently present with advanced disease after experiencing significant decreases in quality of life.A number of patients with anorectal complaints are referred to gastroenterologists.However,gastroenterologists' knowledge and experience in approaching these conditions may not be sufficient.This article can serve as a guide to gastroenterologists to recognize,evaluate,and manage medically or non-surgically common benign anorectal disorders,and to identify when surgical referrals are most prudent.A review of the current literature is performed to evaluate comprehensive clinical pearls and management guidelines for each topic.Topics reviewed include hemorrhoids,anal fissures,anorectal fistulas and abscesses,and pruritus ani. | Moonkyung Cho Schubert Subbaramiah Sridhar Robert R Schade Steven D Wexner | 2009 | World Journal of Gastroenterology2009，15，26： | 5 |
| 7 | Lubiprostone used with polyethylene glycol in diabetic patients enhances colonoscopy preparation quality显示文摘AIM: To assess the additive effect of lubiprostone on the quality of colon preparation in diabetics given single-dosed polyethylene glycol electrolyte(PEG)for colonoscopy.METHODS:This was an investigator-initiated,singlecenter,single-blinded prospective trial comparing the efficacy of L+PEG to PEG alone on colon preparation quality in diabetics undergoing screening colonoscopy.The study was approved by our institution’s IRB.The PEG was given as a single-dose to address patientcompliance concerns voiced by our IRB with splitdosing.All patients received only clear liquids the day prior to colonoscopy.Experimental group(Grp L)received PEG+1 dose L 2 h prior to and 2 h after PEG completion.Control group(Grp C)received only PEG the evening prior to the colonoscopy.Patients were randomly assigned to one of the 2 groups.The endoscopist was blinded to which colon prep was given and all colonoscopies were complete.Upon colonoscopy completion,the endoscopist rated the colon prep-quality by a validated 5-point Likert scale(1-excellent to 5-inadequate).RESULTS:Sixty patients were enrolled in the study;30 Grp L and 30 Grp C.Overall,patients were excluded due to study non-completion in 12(41%)Grp L and 5(17%) Grp C,P=0.04.Average colon preparation score Grp L =2.47 and Grp C=3.00,P=0.09.Although this was not statistically significant,there was a trend towards improved colon prep in Grp L.Statistical significance may have been achieved if completion rates had been similar between both study groups.CONCLUSION:Use of 2-L capsules with PEG resulted in a trend towards improved colon prep over PEG alone in diabetic patients when given as a single-dose regimen. | Erika Grigg Moonkyung C Schubert Joshua Hall Fadi Rahhal Dimple Raina Subbaramiah Sridhar Sherman M Chamberlain | 2010 | World Journal of Gastrointestinal Endoscopy2010，2，7： | 5 |
| 8 | p53 spreads out further: suppression of EMT and stemness by activating miR-200c expression显示文摘 | Jorg Schubert Thomas Brabletz | 2011 | Cell Research2011，21，5： | 4 |
| 9 | 汉堡港岸地区的转型过程显示文摘本文首先分析了海港城市结构变化的背景,介绍了城市开发宏观背景下的汉堡港开发。随后描述了汉堡重要的用途置换计划“珍珠项链(Perlenkette)”、哈尔堡内河港、港口城市以及“跨越易北河”,最终将这些项目在港口/城市开发的框架中定位。 | Dirk Schubert 干靓 | 2006 | 国外城市规划2006，21，1： | 4 |
| 10 | 国外硬质合金企业高效运作浅析显示文摘对国外 ,特别是欧洲硬质合金企业高效运作的原因进行了分析。指出 ,新产品、新技术研究与开发的高投入 ,充分利用高校资源、加强与高等院校之间的科研合作 ,大力推广新产品、新技术与新设备 ,注重服务、全力开拓国际市场是国外硬质合金企业高效运作的主要原因。在此基础上对国内硬质合金企业的运作提出了建议。 | 张立 黄伯云 Schubert W.D | 2003 | 硬质合金2003，20，2： | 4 |
| 11 | Structure-property relationships in ILs: A study of the alkyl chain length dependence in vaporisation enthalpies of pyridinium based ionic liquids显示文摘The enthalpies of vaporization for the series of pyridinium-based ionic liquids with bis(trifluoromethylsulfonyl)imide anion [CnPy][NTf2] (n = 2, 3, 4, 5, and 6) have been determined with the quartz crystal microbalance technique combined with the Langmuir evaporation. The linear dependence of vaporization enthalpies on the chain length has been revealed. New approach based on volumetric, surface tension, and speed of sound measurements has been developed for estimation of heat capacity differences between gas and liquid phase, which were required for adjustment of measured vaporization enthalpies to the ref- erence temperature 298 K. | ZAITSAU Dzmitry H. YERMALAYEU Andrei V. EMEL'YANENKO Vladimir N. VEREVKIN Sergey P. WELZ-BIERMANN Urs SCHUBERT Thomas | 2012 | Science China Chemistry2012，55，8： | 4 |
| 12 | Evolution of the social network of scientific collaborations显示文摘 | A.L Barabási H Jeong Z Néda E Ravasz A Schubert T Vicsek | 2002 | Physica A: Statistical Mechanics and its Applications2002，，3： | 3 |
| 13 | Endoscopic Transforaminal Discectomy for Recurrent Lumbar Disc Herniation: A Prospective, Cohort Evaluation of 262 Consecutive Cases显示文摘 | Thomas Hoogland Karolien van den Brekel-Dijkstra Michael Schubert Boris Miklitz | 2008 | Spine2008，，9： | 3 |
| 14 | Light-weight structures produced by laser beam joining for future applications in automobile and aerospace industry显示文摘 | E. Schubert M. Klassen I. Zerner C. Walz G. Sepold | 2001 | Journal of Materials Processing Tech2001，，1： | 3 |
| 15 | 纯氧气氛下硬质合金及其原料的热稳定性显示文摘采用差热分析法研究了纯氧气氛下WC粉、Co粉、RE Co预合金粉、WC 8Co硬质合金的热稳定性以及稀土对硬质合金热稳定性的影响。研究结果表明:费氏粒度分别为0.51μm和0.93μm的WC粉和Co粉分别在392℃和282℃就开始明显氧化,由于湿磨过程的活化作用与破碎作用,硬质合金混合料的热稳定性进一步降低,因此,在制备硬质合金混合料特别是超细硬质合金混合料的过程中对湿磨介质、混合料干燥方式与干燥温度等应进行严格选择与控制;在湿磨过程中,稀土以RE Co预合金粉形式加入制备成含稀土的硬质合金,在混合料制备过程中RE Co预合金粉不会发生明显氧化,其热稳定性与硬质合金基本原料WC粉和Co粉的热稳定性相当;稀土的添加量对WC Co硬质合金的热稳定性影响不大,在合金中加入稀土不能使合金的明显氧化起始温度得到显著提高;在约700℃,WC 8Co硬质合金发生明显氧化,因此,WC 8Co硬质合金的实际使用温度应低于700℃。 | 张立 陈述 SCHUBERT WD 黄伯云 吴恩熙 | 2004 | 中南大学学报(自然科学版)2004，35，6： | 3 |
| 16 | Transforaminal Posterolateral Endoscopic Discectomy With or Without the Combination of a Low-Dose Chymopapain: A Prospective Randomized Study in 280 Consecutive Cases显示文摘 | Thomas Hoogland Michael Schubert Boris Miklitz Agnes Ramirez | 2006 | Spine2006，，24： | 3 |
| 17 | More than eight years' hands-on experience with the novel long-acting parenteral testosterone undecanoate显示文摘为 T 缺乏的处理的混合物是可得到的几乎 70 年了,但是药品的明确的表达是不到理想的睾丸激素(T) 。传统地,血管注射剂 T 酉旨被用于处理,但是他们立即在 2-3 周刊注射间隔以后产生在上正常 Tlevels。T 层次然后很快衰退,在先于下一注射的日子期间变得低于正常。在血浆 T 的快速的变化主观上作为讨厌经验丰富。T undecanoate (TU ) 是有更加更好的 pharmacokinetic 侧面的新血管注射剂 T 准备。在 6-weekinterval 分开的二起始的注射以后,在二注射之间的下列间隔 12 个星期通常是,最后每年等于四注射的一个总数。有这准备的血浆 T 层次几乎总是在正常的人的范围,作为是它的新陈代谢的产品雌二醇和二氢睾酮(DHT ) 。它在骨头和肌肉和新陈代谢的参数上,并且在性功能上颠倒性腺机能减退的效果。它对男避孕合适。因为血浆 T 层次的连续常态,它的安全侧面是优秀的。没有红血球增多症被观察了并且类脂化合物侧面上的没有不利效果。前列腺安全参数在引用限制以内好。TU 是雄激素缺乏的一种珍贵处理选择。 | Farid Saad Axel Kamischke Aksam Yassin Michael Zitzmann Markus Schubert Ffiedrich Jockenhovel HermannM. Behre Louis Gooren Eberhard Nieschlag | 2007 | Asian Journal of Andrology2007，9，3： | 3 |
| 18 | 稀土在硬质合金球形粉末烧结体表面富集现象的观察显示文摘采用合金粉末烧结体表面观察法研究了稀土在WC-Co硬质合金中的作用机理。合金中的稀土分别以混合稀土(以La和Ce为主体成分)-Co预合金粉(简称RE-Co预合金粉)形式和La(NO3)3的丙酮溶液形式在湿磨时直接加入。用扫描电镜和能谱仪对平均粒径小于200μm的2种球形稀土硬质合金粉末(简称合金粉末)烧结体表面进行观察与分析,发现:以RE-Co预合金粉形式加入稀土时,在烧结过程中,合金中的稀土La和Ce以及杂质元素在合金粉末烧结体表面产生了明显的富集,形成了含La,Ce,S,Ca,W,C和O的复杂形式的化合物,在稀土富集物中没有检测到Co。以La(NO3)3形式加入稀土,在合金粉末烧结体表面没有检测到La。说明在合金粉末烧结体表面不存在La的富集或聚集。稀土的添加形式同时也影响合金粉末烧结体表面硬质相WC与粘结相的比例,以RE-Co预合金粉末形式加入稀土,合金粉末烧结体表面粘结相含量较少,因此,稀土的添加形式影响其在硬质合金中的作用机理。以RBCo预合金粉形式加入稀土,合金中的稀土不但具有较好的富集合金中杂质元素的作用,而且还可以阻止烧结体表面富粘结相结构的形成。 | 张立 黄伯云 陈述 Schubert W D 吴恩熙 | 2004 | 粉末冶金材料科学与工程2004，9，1： | 2 |
| 19 | 碳纳米管模板法制备碳化钨纳米棒的可行性研究显示文摘采用碳纳米纤维管,WO3和I2为原料对碳纳米管模板法制备碳化钨纳米棒的可行性进行了研究,并对其制备原理进行了分析,提出了因碳纳米管产生的隧道效应,挥发性钨源被不断吸入纳米管内并与管壁发生碳化反应生成碳化钨棒的反应模型;在实验结果的基础上,进一步提出了纳米棒强化的新概念硬质合金的制备新方案。 | 张立 Schubert W.D. 黄伯云 | 2003 | 硬质合金2003，20，4： | 2 |
| 20 | On the assessment of robustness显示文摘 | Jack W. Baker Matthias Schubert Michael H. Faber | 2006 | Structural Safety2006，，3： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员