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493篇 您的检索式:作者名="Fritz H"
    题名 作者 年代 出处 被引量
1盐胁迫条件下杨树组织及细胞中钾、钙、镁的变化显示文摘该文研究了NaCl对群众杨 (Populus‘popularis 35 44’ ,P .popularis)、I 2 1 4杨 (P .×euramericanacv .I 2 1 4 ,P .cv.I 2 1 4 )和胡杨 (P .euphratica) 3种杨树组织和细胞营养状况的影响 .为期 30d的盐处理降低了群众杨和I 2 1 4杨根和茎组织中K+、Ca2 +、Mg2 +的水平 ,而对于叶片营养元素的水平基本没有影响 .与群众杨和I 2 1 4杨比较 ,胡杨组织的营养水平受NaCl的影响最小 .根皮层细胞X 射线微区分析的结果显示 ,NaCl降低了群众杨和I 2 1 4杨细胞壁和液泡中K+、Mg2 +的水平 ,但对于胡杨细胞营养元素水平的影响较小 .实验结果表明 ,胡杨在盐胁迫条件下能保持对营养元素的吸收 ,维持较好的营养状况 ,这是其抗盐性强的原因之一 ;I 2 1 4杨和群众杨的抗盐性弱 。陈少良 李金克 尹伟伦 王沙生 Eberhard Fritz Andrea Polle Aloys Httermann 2002北京林业大学学报2002,24,5:41
2盐胁迫下胡杨和毛白杨叶细胞中的离子区隔化显示文摘该文以抗盐的胡杨和盐敏感的毛白杨组培再生苗为实验材料,利用X--射线微区分析技术研究盐胁迫下(为期20d的盐处理)叶片各种类型细胞内主要元素Na+、Cl-、K+的分布情况,测定的细胞类型包括:①叶脉细胞(叶脉维管束导管、叶脉维管束内部和外部的薄壁细胞);②叶肉细胞(栅栏组织、海绵组织);③表皮细胞(上、下表皮细胞).结果表明,胡杨和毛白杨叶细胞对盐离子的区隔化有明显差异:与毛白杨相比,盐处理后的胡杨叶细胞不但具有较高的拒Na+能力,即将Na+贮存在质外体中,而且液泡区隔Na+的能力也强于毛白杨.在Cl-的区隔化方面,对照处理胡杨各种类型的细胞(包括叶脉、叶肉和表皮细胞)Cl-浓度都高于毛白杨,但在盐胁迫下,胡杨叶片的细胞壁、液泡甚至叶绿体中Cl-的含量都低于毛白杨,这是胡杨根细胞限制Cl-离子根冠运输的结果.盐处理使胡杨叶片各种类型细胞中的K+浓度降低;与胡杨不同,毛白杨叶片细胞中质外体的K+浓度下降,而液泡中的K+水平却相应提高,这是毛白杨细胞内K+重新分配的结果:由于盐处理后毛白杨液泡内积累了过多的Cl-,K+从细胞壁进入液泡,用以平衡液泡内Cl-积累所带来的负电荷.戴松香 陈少良 Eberhard Fritz Andrea Olbrich Christine Kettner Andrea Polle Aloys Hüttermann 2006北京林业大学学报2006,28,S2:14
32001年1月26日高纬磁层顶通量管事件的观测研究显示文摘20 0 1年 1月 2 6日 11:10~ 11:4 0UT ,ClusterⅡ卫星簇位于午后高纬磁鞘边界层和磁鞘区 ,此时行星际磁场Bz 为南向 .本文对在此期间观测到的多次磁通量管事件作了详细的研究 ,获得一系列的新发现 :(1)高纬磁鞘边界层磁通量管的出现具有准周期性 ,周期约为 78s,比目前已知的磁层顶向阳面FTE的平均周期 (8~ 11min)小得多 .(2 )这些通量管都具有强的核心磁场 ;其主轴多数在磁场最小变化方向 ,少数在中间变化方向 ,有些无法用PAA判定其方向 (需要用电流管PAA确定 ) ,这与卫星穿越通量管的相对路径有关 .(3)每个事件都存在很好的HT参考系 ,在HT参考系中这些通量管是准定常态结构 ;所有通量管都沿磁层顶表面运动 ,速度方向大体相同 ,都来自晨侧下方 .通量管的径向尺度为 1~ 2RE,与通常的FTE通量管相当 .(4 )起源于磁层的强能离子大体上沿着管轴方向由磁层向磁鞘运动 ;起源于太阳风的热等离子体沿管轴向磁层传输 .通量管为太阳风等离子体向磁层输运和磁层粒子向行星际空间逃逸提供了通道 .(5 )每个通量管事件都伴随有晨昏电场的反转 ,该电场为对流电场 .黄宗英 濮祖荫 肖池阶 宗秋刚 傅绥燕 谢伦 史全岐 曹晋滨 刘振兴 沈超 史建魁 路立 王迺权 陈涛 T Fritz K-H Glassmeier P Daly H Rème 2004地球物理学报2004,47,2:7
4Association of overexpression of TIF1γ with colorectal carcinogenesis and advanced colorectal adenocarcinoma显示文摘AIM:To determine the expression and clinical significance of transcriptional intermediary factor 1 gamma (TIF1γ),Smad4 and transforming growth factor-beta (TGFβR) across a spectrum representing colorectal cancer (CRC) development.METHODS:Tissue microarrays were prepared from archival paraffin embedded tissue,including 51 colorectal carcinomas,25 tubular adenomas (TA) and 26 HPs,each with matched normal colonic epithelium.Immunohistochemistry was performed using antibodies against TIF1γ,Smad4 and TGFβ RⅡ.The levels of expression were scored semi-quantitatively (score 0-3 or loss and retention for Smad4).RESULTS:Overexpression of TIF1γ was detected in 5/26 (19%) HP;however,it was seen in a significantly higher proportion of neoplasms,15/25 (60%) TAs and 24/51 (47%) CRCs (P<0.05).Normal colonic mucosa,HP,and TAs showed strong Smad4 expression,while its expression was absent in 22/51 (43%) CRCs.Over-expression of TGFβ RⅡ was more commonly seen in neoplasms,13/25 (52%) TAs and 29/51 (57%) CRCs compared to 9/26 (35%) HP (P<0.05).Furthermore,there was a correlation between TIF1γ overexpression and Smad4 loss in CRC (Kendall tau rank correlation value=0.35,P<0.05).The levels of TIF1γ overexpression were significantly higher in stage Ⅲ than in stage Ⅰ and Ⅱ CRC (P<0.05).CONCLUSION:The findings suggest that over-expression of TIF1γ occurs in early stages of colorectal carcinogenesis,is inversely related with Smad4 loss,and may be a prognostic indicator for poor outcome.Shilpa Jain Shashideep Singhal Franto Francis Cristina Hajdu Jin-Hua Wang Arief Suriawinata Yin-Quan wang Miao Zhang Elizabeth H Weinshel Fritz Francois Zhi-Heng Pei Peng Lee Ru-Liang Xu 2011World Journal of Gastroenterology2011,17,35:3
5High Hepatic SCD1 Activity Is Associated with Low Liver Fat Content in Healthy Subjects under a Lipogenic Diet显示文摘Günther Silbernagel Marketa Kovarova Alexander Cegan Jürgen Machann Fritz Schick Rainer Lehmann Hans-Ulrich H?ring Norbert Stefan Erwin Schleicher Andreas Fritsche Andreas Peter 2012The Journal of Clinical Endocrinology & Metabolism2012,,12:3
64D Design and Simulation Technologies and Process Design Patterns to Support Lean Construction Methods显示文摘The objective of this ongoing joint research program is to determine how 3D/4D modeling, simulation and visualization of Products (buildings), Organizations and Processes (POP) can support lean construction. Initial findings suggest that Process Design Pattern may have the potential to intuitively support ICT based lean construction. We initiated a 'Process Archeology' in order to reveal the requirements for tools that can support the planning, simulation and control of lean construction methods. First findings show that existing tools provide only limited support and therefore, we started to develop new methodologies and technologies to overcome these shortcomings. Through the introduction of Process Design Patterns, we intent to establish process thinking in the interdisciplinary POP design. Optimized construction processes may be synthesized with semi-automatic methods by applying Process Design Patterns on building structures. By providing process templates that integrate problem solution and expert knowledge, Process Design Patterns may have the potential to ensure high quality process models.Manfred Breit Manfred Vogel Fritz Hubi Fabian Mrki Micheal Raps 2008Tsinghua Science and Technology2008,13,S1:2
7Translating biomolecular recognition into nanomechanics显示文摘Fritz J Bailer M K Lang H P 2000Science2000,288,:1
8Eine quantitative bestimmung der SiH-und Si-Phenyl-Gruppe 显示文摘FRITZ V G BURDT H 1962Zeitschriff fur anorganische und allgemeine Chemie1962,317,:1
9Cadmium in upland forests after vitality fertilization with wood ash-a summary of soil microbiological studies into the potential risk of cadmium release 显示文摘Perkiomtoki J Fritze H 2005Biology and Fertility of Soils2005,41,:1
10Wing rotation and the aerodynamic basis of insect flight显示文摘Michael H Dickinson Fritz Olaf Lehmann Sane Sanjay P 0,,5422:1
11The Sukari gold mine,eastern Desert-Egypt:structural setting,mineralogy and fluid inclusion study显示文摘Helmy H.M Kaindl R Fritz H Loizenbauer J 0,,:1
12The effect of sodium poisoning on dealuminated Y-type zeolites显示文摘FRITZ P O LUNSFORD J H 1989Journal of Catalysis1989,118,1:1
13Crosslinking of LLDPE and VLDPE via graft-po lymerized vinyltrimethoxysilane显示文摘 Fritz H G 1990Plast Rubb and Comp Proc Appl1990,13,:1
14Anemia in cancer patients显示文摘Ludwig H Fritz E 1998Semin Oncol1998,25,7:1
15Depression in mild dementia: association with diagnosis, APOE genotype and clinical features 显示文摘Fritze F Ehrt U Sonnesyn H 2011Int J Geriatr Psychiatry2011,26,10:1
16The effect of mild hypothermia on plasma fentanyl concentration and biotransformation in juvenile pigs显示文摘Fritz H G Holzmayr M Walter B 2005Anesth Analg2005,100,4:1
17Anemia of cancer patients election and patients tratifieation for epoetin treatment 显示文摘Ludwig H Fritz E 1998Semin Oncol1998,25,7:1
18Experimental and observational studiesof patch choice at different scales by the crab spider Misumenavatia显示文摘Morse D H Fritz R S 1982Ecology1982,63,1:1
19Near field characteristics of landslide generated impulse waves显示文摘Fritz H M Hager W H Minor H E 2004Journal of Waterway Port Coastal and Ocean Engineering2004,130,6:1
20Anemia in cancer patients显示文摘LLUDWIG H FRITZ E 1998Semin Onol1998,,:1
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