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| 1 | Oxidation and Thermal Fatigue Behaviors of Two Type Hot Work Steels During Thermal Cycling显示文摘Thermal fatigue test has been carried out on widely used hot work steel 4Cr5MoSiV1and a low alloyed steel 3Cr3MoV in temperature range of 200to 700℃.Tempering resistance,as well as high temperature hardness/strength of steel specimens,works as a dominating material parameter on thermal fatigue resistance.During the heating period,high hardness can depress the inelastic deformation.This deformation is the origination of tensile stress,which acts as the driving force of heat checking during the cooling period.The cyclic strain-oxidation interaction can speed up the damage on surface defects,which plays an obvious role in initiation of thermal cracks.On4Cr5MoSiV1steel specimens,borders between the matrix and inclusions such as titanium compounds,or lager carbides such as primary carbides,are focused by strain and attacked by oxidation,and are main initiating places of cracks.While on 3Cr3MoV steel specimens,larger strain causes plastic deformation concentrating around grain boundaries.Then the following oxidation accelerates this grain boundary damage and creates cracks. | MIN Yong-an Bergstrm Jens WU Xiao-chun XU Luo-ping | 2013 | Journal of Iron and Steel Research(International)2013，20，11： | 5 |
| 2 | 化学物质在土壤中的环境归宿显示文摘通常,人们利用短期的室内试验结果,结合化学物质的降解、物理/化学性质来研究土壤中化学物质的环境归宿。只要化学物质溶解,或是处于与土壤固液相平衡的状态,这些数据或研究结果就可以应用。但是,越来越多的证据表明,要描述化学物质在自然环境中的迁移转化规律,还必须考虑不同尺度的土壤结构,以及降解、吸附/解吸、运移等非平衡过程的影响。以化学物质的淋溶为例,由于能有效地模拟田间状况,在非稳态条件下的田间蒸渗试验是室内试验很好的替代方法。本文介绍了几种利用稳定性田间蒸渗仪和室内分析的方法,研究化学物质降解动力学的实例。重点是与根据化合物的内在(标准)理化性质得出的迁移转化规律进行比较,并提出应用这些性状作为模拟模型的输入参数可能遇到的问题。 | Lars Bergstrm John Stenstrm 史雅娟 | 1998 | 人类环境杂志1998，27，1： | 2 |
| 3 | Improved cryopreservation of human hepatocytes using a new xeno free cryoprotectant solution显示文摘AIM:To optimize a xeno-free cryopreservation protocol for primary human hepatocytes.METHODS:The demand for cryopreserved hepatocytes is increasing for both clinical and research purposes.Despite several hepatocyte cryopreservation protocols being available,improvements are urgently needed.We first compared controlled rate freezing to polystyrene box freezing and did not find any significant change between the groups.Using the polystyrene box freezing,we compared two xeno-free freezing solutions for freezing of primary human hepatocytes:a new medium(STEM-CELLBANKER,CB),which contains dimethylsulphoxide(DMSO) and anhydrous dextrose,both permeating and non-permeating cryoprotectants,and the frequently used DMSO-University of Wisconsin(DMSOUW) medium.The viability of the hepatocytes was assessed by the trypan blue exclusion method as well as a calcein-esterase based live-dead assay before and after cryopreservation.The function of the hepatocytes was evaluated before and after cryopreservation by assessing enzymatic activity of 6 major cytochrome P450 isoforms(CYPs):CYP1A2,CYP2C9,CYP2C19,CYP2D6,CYP3A4 and CYP3A7.RESULTS:The new cryoprotectant combination preserved hepatocyte viability significantly better than the standard DMSO-UW protocol(P < 0.01).There was no significant difference in viability estimation between both the trypan blue(TB) and the Live-Dead Assay methods.There was a correlation between viability of fresh hepatocytes and the difference in cell viability between CB and DMSO protocols(r 2 = 0.69) using the TB method.However,due to high within-group variability in the activities of the major CYPs,any statistical between-group differences were precluded.Cryopreservation of human hepatocytes using the cryoprotectant combination was a simple and xeno-free procedure yielding better hepatocyte viability.Thus,it may be a better alternative to the standard DMSO-UW protocol.Estimating CYP activities did not seem to be a relevant way to compare hepatocyte function between different groups due to high normal variability between different liver samples.CONCLUSION:The cryoprotectant combination may be a better alternative to the standard DMSO-UW protocol in primary human hepatocyte cryopreservation. | Mohammed Saliem Frida Holm Rosita Bergstrm Tengzelius Carl Jorns Lisa-Mari Nilsson Bo-Gran Ericzon Ewa Ellis Outi Hovatta | 2012 | World Journal of Hepatology2012，4，5： | 2 |
| 4 | Experimental studies of transgastric gallbladder surgery: cholecystectomy and cholecystogastric anastomosis (videos) <ce:link locator='fx1'/>显示文摘 | Per-Ola Park Maria Bergstr?m Keiichi Ikeda Annette Fritscher-Ravens Paul Swain | 2005 | Gastrointestinal Endoscopy2005，，4： | 1 |
| 5 | Diet, muscle glycogen and physical performance 显示文摘 | BERGSTR M J HERMANSEN L HULTMAN E | 1967 | Acta Physiol Stand1967，71，2： | 1 |
| 6 | Simulation of soil nitrogen dynamics using the SOILN model显示文摘 | L. Bergstr?m H. Johnsson G. Torstensson | 1991 | Fertilizer Research (-)1991，，2： | 1 |
| 7 | Anomaloearis and other large animals in the Lower Cambrian Chengjiang fauna of southwest China 显示文摘 | Hou Xianguang Bergstr 6m J and Ahlberg P | 1995 | Geologiska Foreningens I Stockholm Forhandliger1995，117，： | 1 |
| 8 | Arthropods from the Lower Cambrian Chengjiang fauna,southwest China 显示文摘 | Hou Xianguang Bergstr bm J | 1997 | Fossil and Strata1997，45，： | 1 |
| 9 | Different effect of age on dopamine transporters in the dorsal and ventral striatum of controls and alcoholics显示文摘 | Tupala E Hall H Bergstrm K | 2003 | Synapse2003，48，4： | 1 |
| 10 | Stress sensitivity and resilience in the chronic mild stress rat model of depression;an in situ hybridization study显示文摘 | Bergstrm A Jayatissa M N Mrk A | 2008 | Brain Res2008，1196，： | 1 |
| 11 | Functional and morphologic imaging of coronary atherosclerosis in living mice using high-resolution color Doppler echocardiography and ultrasound biomicroscopy显示文摘 | Wikstr(o)m J Grnros J Bergstrm G | 2005 | J Am Coll Cardiol2005，46，4： | 1 |
| 12 | Serum levels of NG,NG-dimethyl-L-arginine,a potential endogenous eitric oxide inhibitor in dialysis patinents显示文摘 | Bjrn Anderstam Krassimir Katzatski Jonas Bergstrm | 1997 | J Am Soc Nephrol1997，8，9： | 1 |
| 13 | Increased cartilage turnover and circulating autoantibodies in different subsets before the clinical onset of rheumatoid arthritis显示文摘 | Turesson C Bergstr (o) m U Jacobsson LT | 2011 | Ann Rheum Dis2011，70，3： | 1 |
| 14 | Hexachlorobenzene as an indicator of dioxin production from combustion显示文摘 | BERG T BERGSTR M J G T | 1985 | Chemosphere1985，14，8： | 1 |
| 15 | Peritoneal and systemic pH during pneumoperitoneum with CO2 and helium in a pig model显示文摘 | Bergstr(o)m M Falk P Park PO | 2008 | Surg Endosc2008，22，2： | 1 |
| 16 | Treatment difficulty and treatment outcome in orthodontic care 显示文摘 | Bergstr?m K Halling A Huggare J | 1998 | Europ J Orthod1998，20，： | 1 |
| 17 | Impact of age at diagnosis on prognosis and treatment in laryngeal cancer显示文摘 | Reizenstein JA Bergstr? m SN Holmberg L | 2010 | Head Neck2010，32，8： | 1 |
| 18 | Biochar addition to agricultural soil increased CH4 uptake and water holding capacity-results from a short-term pilot field study显示文摘 | Karhu K Mattila T Bergstr om I | | Agriculture Ecosystems and Environment0，，： | 1 |
| 19 | Effects of adalimumab treatment on endothelial cell activation markers in the skeletal muscle of patients with rheumatoid arthritis显示文摘 | Bergstrm U Grundtman C Lundberg IE | 2014 | Clin Exp Rheumatol2014，32，6： | 1 |
| 20 | Clinical Phase I study with an Insulin-like Growth Factor-1 Receptor Inhibitor: Experiences in patients with squamous non-small cell lung carcinoma显示文摘 | Simon Ekman Jan-Erik Fr? din Johan Harmenberg Antonina Bergman ? sa Hedlund Pia Dahg Carina Alvfors Birgitta St? hl Stefan Bergstr? m Michael Bergqvist | 2011 | Acta Oncologica2011，，3： | 1 |
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