检索结果-南通市图书馆

Alpine Activity Patterns of Mitopus morio(Fabricius, 1779) are Induced by Variations in Temperature and Humidity at Different Scales in Central Norway

引用

Journal of Mountain Science 2014年第3期11卷 644-655页

作者： nils hein Roland PAPE Oliver-D. FINCH Jorg LOFFLER Department of C-eography University of Bonn Meckenheimer AUee 166 D-53115 Bonn Germany Achtern Nordpol 8 D-26180 Rastede Germany

Our research addresses questions about how micro-climate affects activity abundance of a common and widespread harvestman in an alpine ecosystem. Activity patterns of the Harvestman Mitopus morio(Fabricius, 1779) were studied along different alpine gradients in the central Norwegian Scandes. Within a nested design, we surveyed 18 alpine habitats with pitfall traps and microclimatological equipment along oceanic-continental, two elevational, and(fine-scaled) microtopographic gradients. Sites in the oceanic region of the Scandes showed generally higher abundance of M. morio than sites in the continental region. Furthermore, along the elevational gradient, middle-alpine sites showed higher abundances than low-alpine sites. These general patterns are best explained by higher humidity in the oceanic region and in the middlealpine belt. Focusing at a finer scale, i.e. one elevational level within each region, revealed partly opposing activity patterns within relatively short distances. While in the western middle-alpine belt these patterns were best explained by humidityrelated measures but now with higher activity abundance during drier conditions, in the drier eastern middle-alpine belt heat sums rather than humidity were found to be the best explanatoryvariables for the observed patterns. Hence, our results imply a pronounced different reaction of the two populations towards climatic variables that partly even contradict the previously described general pattern. Regardless whether these differences in activity abundance in M. morio are a form of phenotypic plasticity or adaptation, our findings stress the importance of detailed autecological knowledge combined with fine-scaled climatic measurements when aiming at predictions about possible future ecosystem structures and spatiotemporal phenomena. M. morio proves to be an ideal biogeographic model organism for understanding spatio-temporal responses of alpine ecosystems under modified climatic conditions.

关键词： Climate gradients Opiliones Arctic-alpine ecosystems High mountains Scandinavia

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Combined Add-on Supplementation of Omega-3 Fatty Acids, Vitamin E, Vitamin A, Copper, and Selenium in Rheumatoid Arthritis

引用

Food and Nutrition Sciences 2011年第7期2卷 714-723页

作者： Janina Willers Sabine Fasse nils Putschky Henning Zeidler Hans-Georg Pott Michael Bernateck Winfried Demary Reinhard hein Vu Vi Pham Rainer Stange Bernhard Uehleke Heike Franziska Weidemann Guido Hoese Ralf Lichtinghagen Andreas Hahn 不详

Objectives: The present study evaluated the effects of a combined nutritional supplement, containing omega-3 fatty acids (ω-3 FA) and different antioxidative micronutrients on nutrient status and disease activity in patients with rheumatoid arthritis (RA). Methods: The study was conducted as a double-blind, randomised placebo-controlled trial. A hundred patients with defined RA were allocated to the verum or placebo group. During a period of twelve weeks they were given three capsules of their specific study supplementation every day. The daily dosage of ω-3 FA was 1.35 g (thereof 900 mg eicosapentaenoic acid, EPA), 90 mg vitamin E, 600 μg vitamin A, 3 mg copper, and 75 μg selenium, or soy oil (placebo), respectively. Outcome variables were the changes in DAS 28, the number of tender and swollen joints, morning stiffness, and supply with different nutrients (e.g. serum concentration of EPA, AA and vitamin E), as well as blood lipid levels. Results: Sixty-four participants were included in this analysis: 30 receiving verum and 34 placebo. After twelve weeks of intervention, little but not significant improvements were observed in the DAS 28 and other clinical factors. Subgroup analysis revealed that the effect was much more pronounced in patients who were at least at a moderate activity of illness. Regarding the nutritional status, the serum concentration of EPA (P < 0.001), vitamin E (P < 0.01), SOD (P < 0.05), and GPx (P < 0.001) increased significantly, while AA (P < 0.001) decreased after supplementation. The concentration of triglycerides decreased significantly in the verum group (P < 0.05) but not in the placebo group. Conclusions: A twelve week add-on supplementation of a combined food supplement (ω-3 FA + antioxidants) effected modest but not significant changes in the clinical parameters in RA. Though vitamin E, SOD and GPx improved significantly, equivalent to an increased antioxidant defence. This supplementation was dedicated to enhance the nutritional s

关键词： Rheumatoid Arthritis Nutrition Omega-3 Fatty Acids Antioxidants Lipid Profil

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

设计和创新——一个全新的机电系统教学框架

设计和创新——一个全新的机电系统教学框架

引用

2005年中国机械工程学会年会

作者： Lars hein Mogens Myrup Andreasen Department of Mechanical Engineering（MEK） Technical University of Denmark Nils Koppels AlleBuilding 404DK-2800 Kgs.Lyngby Department of Mechanical Engineering（MEK） Technical University of Denmark Nils Koppels AlleBuilding 404DK-2800 Kgs.Lyngby

在机电系统领域的教学大多数是基于分析的方法,或者是针对一个已经定义好的产品和概念的子系统进行优化。但是在产品开发过程中更大的挑战往往来自于在复杂的机电系统中综合进新的功能,那些对使用者和设计者而言都觉得新颖的功能。经过... 详细信息

在机电系统领域的教学大多数是基于分析的方法,或者是针对一个已经定义好的产品和概念的子系统进行优化。但是在产品开发过程中更大的挑战往往来自于在复杂的机电系统中综合进新的功能,那些对使用者和设计者而言都觉得新颖的功能。经过这样的综合,产品的机械,电子,软件和服务要素可以紧密地作用在一起以优化产品的性能,质量,价格以及灵活性等等。但是,一门机电系统的设计过程必须有一系列相应课程的支持以使学生具备各方面的能力。本文讨论了一个新建的工程教学项目“设计和创新”,并在此基础上讨论了机电系统的课程设计（作为该项目的嵌入课程）。

关键词：工程设计机电系统设计创新教学

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：