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| 1 | 青藏高原东缘晚新生代成都盆地物源分析与水系演化显示文摘成都盆地位于青藏高原东缘,夹于龙门山与龙泉山之间,盆地中充填了3.6M a以来的大邑砾岩、雅安砾石层和晚更新世—全新世砾石层,其物源均来源于盆地西侧的龙门山,具横向水系和单向充填的特征。本次以物源区分析作为切入点,以岷江和青衣江水系为重点,采用砾岩成分分析、砂岩岩屑成分分析、重矿物分析和砾石的地球化学分析等基本方法,开展青藏高原东缘晚新生代以来的古水系重建工作,研究结果表明,成都盆地主要有两个物源区,其中成都盆地北部的都江堰街子场、崇州白塔山、大邑白岩沟、大邑氮肥厂、彭州丁家湾、彭州葛仙山等剖面中的砾石层在碎屑成分、重矿物和花岗岩砾石的地球化学成分等方面相似,应为古岷江的产物,而其与现代岷江在砾岩成分和重矿物特征等方面的差异性则表明古岷江可能存在改道的现象;成都盆地南部的庙坡剖面和熊坡东剖面中的砾石层在碎屑成分、重矿物和花岗岩砾石的地球化学成分等方面相似,应为古青衣江的产物,但其流向却与现代青衣江的流向不同,表明熊坡背斜是在大邑砾岩沉积之后隆起的,它的隆起迫使古青衣江改道。 | 李勇 黎兵 Steffen D DensmoreAL RichardsonNJ 周荣军 Ellis M A 张毅 | 2006 | 沉积学报2006，24，3： | 38 |
| 2 | 博斯腾湖碳酸盐和同位素组成的全新世古环境演变高分辨记录及与冰川活动的响应显示文摘本文通过对在新疆南部塔里木盆地北缘博斯腾湖采集的一根953cm的岩心进行了早全新世以来的古气候重建。对BSTC2000岩心进行了碳酸盐矿物组成、Ca/1000Sr,有机质TOC,C/N和C/S分析,并结合BSTC2000岩心附近的一个沉积物剖面的孢粉资料,利用多指标重建了8500aBP以来的古气候变化特征。在2个平行岩心中对保存的植物叶片、草籽,以及全有机质进行了9个AMS14C年代测定。8500~8100aBP气候冷湿,钻孔位置为河流-滨湖相环境,沉积物中有3层泥炭层。从8100~6400aBP,气温升高,湖泊扩张,气候暖湿,湖泊可能为最高湖面时期。而从6400~5100aBP湖泊稍微下降,气候变冷。在中全新世晚期从5100~3100aBP气候变得高温干旱,但其间的4400~3800aBP有短暂的气候变冷,早期大量的冰雪融水补给博斯腾湖,使得湖泊水位上升。湖泊的第二个高湖面期是5200~3800aBP。在3100~2200aBP气候冷湿,由于蒸发减弱而湖泊有所扩张,湖泊在3100至2800aBP期间是最后一次短暂的高湖面期。这次短期高湖面后,湖泊由于较长时期的低温而引起的供水减少,湖泊收缩。从2200~1200aBP,气候变得干热,湖泊收缩。尽管从1200aBP以来,温度有所下降,气候变得暖干,湖泊又开始有所上升,但是没有达到博斯腾湖出水口孔雀河的海拔高度。 | 张成君 郑绵平 A PROKOPENKO M STEFFEN 匡娟 杨奇丽 郭方琴 冯兆东 | 2007 | 地质学报2007，81，12： | 25 |
| 3 | Echo-enhanced ultrasound with pulse inversion imaging: A new imaging modality for the differentiation of cystic pancreatic tumours显示文摘瞄准:在膀胱的胰腺的损害的鉴别诊断描述并且讨论提高回响的 sonography。方法:脉搏倒置技术(与 2.4 mL SonoVue 的静脉注射) 或在第二泛音成像的条件下面的 power-Doppler 模式(与 4 g Levovist 的静脉注射) 被用于提高回响的 sonography。结果:Cystadenomas 经常沿着纤维变性海滨显示出许多容器。在另一方面,包囊腺癌是糟糕并且混乱 vascularized。“年轻假包囊”经常被发现有一面高度脉管的 ised 墙。然而,“旧假包囊”的墙是糟糕 vascularized。从未来的研究的数据证明基于这些成像标准,在膀胱的胰腺的群众的区别的提高回响的 sonography 的敏感和特性是 >90% 。结论:膀胱的胰腺的群众在提高回响的 sonography 有一个不同血管形成模式。这些特征为他们的鉴别诊断是有用的,但是组织学仍然是标准答案。 | Steffen Rickes Klaus Mnkemüller Peter Malfertheiner | 2006 | World Journal of Gastroenterology2006，12，14： | 10 |
| 4 | Influence of experimental soil disturbances on the diversity of plants in agricultural grasslands显示文摘Aims and Methods Disturbance is supposed to play an important role for biodiversity and ecosystem stability as described by the intermediate disturbance hypoth-esis(IDH),which predicts highest species richness at intermediate levels of disturbances.In this study,we tested the effects of artificial soil distur-bances on diversity of annual and perennial vascular plants and bryo-phytes in a field experiment in 86 agricultural grasslands differing in land use in two regions of Germany.On each grassland,we implemented four treatments:three treatments differing in application time of soil dis-turbances and one control.One year after experimental disturbance,we recorded vegetation and measured biomass productivity and bare ground.We analysed the disturbance response taking effects of region and land-use-accompanied disturbance regimes into account.Important Findings Region and land-use type strongly determined plant species rich-ness.Experimental disturbances had small positive effects on the species richness of annuals,but none on perennials or bryophytes.Bare ground was positively related to species richness of bryophytes.However,exceeding the creation of 12%bare ground further distur-bance had a detrimental effect on bryophyte species richness,which corresponds to the IDH.As biomass productivity was unaffected by disturbance our results indicate that the disturbance effect on spe-cies richness of annuals was not due to decreased overall produc-tivity,but rather due to short-term lowered inter-and intraspecific competition at the newly created microsites.Generally,our results highlight the importance of soil disturbances for species richness of annual plants and bryophytes in agricultural grasslands.However,most grasslands were disturbed naturally or by land-use practices and our additional experimental soil dis-turbances only had a small short-term effect.Overall,total plant diversity in grasslands seemed to be more limited by the availabil-ity of propagules rather than by suitable microsites for germination.Thus,nature conservation efforts to increase grassland diversity should focus on overcoming propagule limitation,for instance by additional sowing of seeds,while the creation of additional open patches by disturbance might only be appropriate where natural disturbances are scarce. | Jörg Müller Johannes Heinze Jasmin Joshi Steffen Boch Valentin H.Klaus Markus Fischer Daniel Prati | 2014 | Journal of Plant Ecology2014，7，6： | 3 |
| 5 | National Forest Inventories capture the multifunctionality of managed forests in Germany显示文摘Background:Forests perform various important ecosystem functions that contribute to ecosystem services.In many parts of the world,forest management has shifted from a focus on timber production to multi-purpose forestry,combining timber production with the supply of other forest ecosystem services.However,it is unclear which forest types provide which ecosystem services and to what extent forests primarily managed for timber already supply multiple ecosystem services.Based on a comprehensive dataset collected across 150 forest plots in three regions differing in management intensity and species composition,we develop models to predict the potential supply of 13 ecosystem services.We use those models to assess the level of multifunctionality of managed forests at the national level using national forest inventory data.Results:Looking at the potential supply of ecosystem services,we found trade-offs(e.g.between both bark beetle control or dung decomposition and both productivity or soil carbon stocks)as well as synergies(e.g.for temperature regulation,carbon storage and culturally interesting plants)across the 53 most dominant forest types in Germany.No single forest type provided all ecosystem services equally.Some ecosystem services showed comparable levels across forest types(e.g.decomposition or richness of saprotrophs),while others varied strongly,depending on forest structural attributes(e.g.phosphorous availability or cover of edible plants)or tree species composition(e.g.potential nitrification activity).Variability in potential supply of ecosystem services was only to a lesser extent driven by environmental conditions.However,the geographic variation in ecosystem function supply across Germany was closely linked with the distribution of main tree species.Conclusions:Our results show that forest multifunctionality is limited to subsets of ecosystem services.The importance of tree species composition highlights that a lack of multifunctionality at the stand level can be compensated by managing forests at the landscape level,when stands of complementary forest types are combined.These results imply that multi-purpose forestry should be based on a variety of forest types requiring coordinated planning across larger spatial scales. | Nadja K.Simons María R.Felipe-Lucia Peter Schall Christian Ammer Jürgen Bauhus Nico Blüthgen Steffen Boch François Buscot Markus Fischer Kezia Goldmann Martin M.Gossner Falk Hänsel Kirsten Jung Peter Manning Thomas Nauss Yvonne Oelmann Rodica Pena Andrea Polle Swen C.Renner Michael Schloter Ingo Schöning Ernst-Detlef Schulze Emily F.Solly Elisabeth Sorkau Barbara Stempfhuber Tesfaye Wubet Jörg Müller Sebastian Seibold Wolfgang W.Weisser | 2021 | Forest Ecosystems2021，8，1： | 2 |
| 6 | Safe and Early Discharge After Colorectal Surgery Due to C-Reactive Protein: A Diagnostic Meta-Analysis of 1832 Patients显示文摘 | Rene Warschkow Ulrich Beutner Thomas Steffen Sascha A. Müller Bruno M. Schmied Ulrich Güller Ignazio Tarantino | 2012 | Annals of Surgery2012，，2： | 2 |
| 7 | Evaluation of methods for the prediction of membrane spanning regions显示文摘 | Steffen Mö ller Michael D. R. Croning | 2001 | Bioinformatics2001，，： | 2 |
| 8 | Variable expression of cystatin C in cultured trans-differentiating rat hepatic stellate cells显示文摘瞄准:学习 C (CysC ) ,它由转变生长 factor-beta1 (TGF-beta1 ) 的规定和导出血小板的生长因素(PDGF ) 和有在这个特殊房间发信号的 TGF-beta1 的 CysC 的潜在的干扰打的 cystatin 的表示。方法:我们计算了 CysC 表达式在有教养, profibrogenic 肝的星形细胞和区分 trans 的 myofibroblasts 由北、西方弄污并且共焦的激光扫描显微镜学。结果:CysC 在 trans 区别期间显著地被增加。TGF-beta1 和 PDGF-BB 压制了 CysC 表示。而且, CysC 分泌物被处理与 TGF-beta1 导致。尽管 CysC 导致了 TGF 贝它的一种增加的有约束力的亲密关系,受体是由化学 cross-linking 估计了与打 III (beta-glycan )[125I ] 它没调制的 -TGF-beta1, 由评估 Smad2/3 磷酸化地位出现的 TGF-beta1 信号转导变异并且[CAGA ]-MLP-luciferase 记者基因试金。有趣地,流类型 III TGF 贝它受体 beta-glycan 在对待 CysC 的房间被减少。我们的数据显示那 CysC 表情起来在 trans 区别期间调整了。结论:在患肝疾病的病人的浆液的增加的 CysC 层次是至少部分由于在激活的肝的星形细胞的更高的表情。而且, TGF-beta1 影响 CysC 的分泌物,加亮在肝的纤维发生的前进的半胱氨酸朊酶的一个潜在地重要的角色。 | Axel M Gressner Birgit Lahme Steffen K Meurer Olav Gressner Raif Weiskirchen | 2006 | World Journal of Gastroenterology2006，12，5： | 2 |
| 9 | Significance of an additional unenhanced scan in computed tomography angiography of patients with suspected acute aortic syndrome显示文摘AIM To assess potential benefits of an additional unenhanced acquisition in computed tomography angiography(CTA) in patients with suspected acute aortic syndrome(AAS).METHODS A total of 103 aortic CTA(non-electrocardiography-gated, 128 slices) performed due to suspected AAS were retrospectively evaluated for acute aortic dissection(AAD), intramural hematoma(IMH), or penetrating aortic ulcer(PAU). Spiral CTA protocol consisted of an unenhanced acquisition and an arterial phase. If AAS was detected, a venous phase(delay, 90 s) was added. Images were evaluated for the presence and extent of AAD, IMH, PAU, and related complications. The diagnostic benefit of the unenhanced acquisition was evaluated concerning detection of IMH.RESULTS Fifty-six(30% women; mean age, 67 years; median, 68 years) of the screened individuals had AAD or IMH. A triphasic CT scan was conducted in 76.8%(n =43). 56% of the detected AAD were classified as Stanford type A, 44% as Stanford type B. 53.8% of the detected IMH were classified as Stanford type A, 46.2% as Stanford type B. There was no significant difference in the involvement of the ascending aorta between AAD and IMH(P = 1.0) or in the average age between AAD and IMH(P = 0.548), between Stanford type A and Stanford type B in general(P = 0.650) and between Stanford type A and Stanford type B within the entities of AAD and IMH(AAD: P = 0.785; IMH: P = 0.146). Only the unenhanced acquisitions showed a significant density difference between the adjacent lumen and the IMH(P = 0.035). Subadventitial hematoma involving the pulmonary trunk was present in 5 patients(16%) with Stanford A AAD. The difference between the median radiation exposure of a triphasic(2737 mGy*cm) compared to a biphasic CT scan(2135 mGy*cm) was not significant(P = 0.135).CONCLUSION IMH is a common and difficult to detect entity of AAS. An additional unenhanced acquisition within an aortic CTA protocol facilitates the detection of IMH. | Nikolaos Panagiotopoulos Felix Drüschler Martin Simon Florian M Vogt Sebastian Wolfrum Steffen Desch Doreen Richardt Jorg Barkhausen Peter Hunold | 2018 | World Journal of Radiology2018，10，11： | 2 |
| 10 | Role of oxidants and antioxidants in atherosclerosis: results of in vitro and in vivo investigations显示文摘 | SIEKMEIER R STEFFEN C MERZ W | 2007 | Journal of Cardiovascular Pharmacology and Therapeutics2007，12，4： | 1 |
| 11 | 查看详情显示文摘 | Baur M Fedorov A Steffen L Filipp S Silva M P Wallraff A | | 0，，： | 1 |
| 12 | Influence of mixing method on the cement temperature-mixing time history and doughing time of three acrylic cements for vertebroplasty显示文摘 | Baroud G Samara M Steffen T | 2004 | J Biomed Mater Res B Appl Biomater2004，68，1： | 1 |
| 13 | Polyacrylic fibers显示文摘 | Gries T Rixe C Steffens M | 2002 | Chemical Fibers International2002，52，： | 1 |
| 14 | Modification of humic acids by the compost-dwelling deuteromycete Paecilomyces in flatus显示文摘 | Kluczek-Turpeinen B Steffen K T Tuomela M | 2005 | Applied Microbiology and Biotechnology2005，66，： | 1 |
| 15 | Targeting of renal cell carcinoma with iodine-131-labelled chimeric monoclonal antibody G250显示文摘 | Steffens M G Corstens F H M Oosterwijik E | 1997 | J Clin Oncol1997，15，： | 1 |
| 16 | A New Flux 显示文摘 | Liou M S Steffen Splitting Scheme C J | 1993 | Journal of Computational Physics1993，107，1： | 1 |
| 17 | Mineralisation of supper (14)C- labblled synthetic lignin and linginoltic enzyme activities of litter decomposing basi-diomycetous fungi 显示文摘 | Steffen K T Hofrichter M Hatakka A | 2000 | Applied Microbiology and Biotechnology2000，54，6： | 1 |
| 18 | On the balancing of flexible rotating machines by using an inverse problem approach 显示文摘 | Villafane Saldarriaga M Steffen Jr V Der Hago-pian J | 2011 | Journal of Vibration and Control2011，17，7： | 1 |
| 19 | In vitro effects of 2- methoxyestradiol on MCF-12A and MCF-7 cell growth,morpholo- gy and mitotic spindle formation 显示文摘 | Van Zijl C Lottering M L Steffens F | 2008 | Cell Biochem Funct2008，26，63： | 1 |
| 20 | The impact of vacuum freeze-drying on collagen sponges after gas plasma steri-lization 显示文摘 | Markowicz M Koellensperger E Steffens GC | 2006 | J Biomater Sci Polym Ed2006，17，12： | 1 |
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