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Decline of semen quality during IVF is not associated with subjective male stress

Asian Journal of Andrology 2014年第4期16卷 597-601页

作者： Kazem Nouri Brigitte Litschauer Michael Sator Denise Tiringer Johannes ott Katherina Walch Lukas A Hefler Clemens B Tempfer Department of Obstetrics and Gynecolog Department of Clinical Pharmacology Medical University of Vienna Vienna Department of Obstetrics and Gynecology Krankenhaus Barmherzige Schwestern Linz Austria Department of Obstetrics and Gynecology Ruhr University Bochum Bochum Germany.

The aim of the present study was to assess if semen quality declines during in vitro fertilization （IVF） and whether or not this phenomenon is triggered by chronic male stress. In order to test this hypothesis, we first investigated a retrospective cohort of 155 male IVF patients （testing cohort）. Subsequently, we started a prospective cohort study in men undergoing their first IVF and assessed semen quality and subjective male chronic stress using a validated tool, i.e. the Fertility Problem Inventory （FPI） questionnaire. The association between stress and sperm quality decline measured 4-6weeks before the start of IVF （T1） and at the day of oocyte retrieval （T2） was the primary outcome. Live birth rate, first trimester abortion and rate of poor responders were secondary outcomes. In the testing cohort, mean progressive motility, but not mean sperm density significantly declined. There were 78/154 （51%） men who showed a decline in semen density and 50/154 （32%） men who showed a decline in progressive motility. In the validation cohort, progressive motility declined, whereas, sperm density increased from T1 to T2. Of 78 men, 27 men had increased stress （FPI-score 〉 146）. Sperm density and progressive motility were not significantly different in men with and without stress. However, in the presence of male stress, couples had a higher rate of poor responders, miscarriages and a lower rate of live births. Subjective stress is not associated with a decline in semen quality observed during IVF but may be associated with adverse ore^nancv outcome.

关键词： in vitro fertilization questionnaire semen quality stress

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Vitamin D deficiency in cirrhosis relates to liver dysfunction rather than aetiology

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World Journal of Gastroenterology 2011年第7期17卷 922-925页

作者： Mikkel Malham SΦren Peter JΦrgensen Peter ott JΦrgen Agnholt Hendrik Vilstrup Mette Borre Jens F Dahlerup Department of Medicine V (Hepatology and Gastroenterology) Aarhus University Hospital

AIM: To examine the vitamin D status in patients with alcoholic cirrhosis compared to those with primary biliary cirrhosis. METHODS: Our retrospective case series comprised 89 patients with alcoholic cirrhosis and 34 patients with primary biliary cirrhosis who visited our outpatient clinic in 2005 and underwent a serum vitamin D status assessment. RESULTS: Among the patients with alcoholic cirrhosis, 85% had serum vitamin D levels below 50 nmol/L and 55% had levels below 25 nmol/L, as compared to 60% and 16% of the patients with primary biliary cirrhosis, respectively (P < 0.001). In both groups, serum vitamin D levels decreased with increasing liver disease severity, as determined by the Child-Pugh score. CONCLUSION: Vitamin D deficiency in cirrhosis relates to liver dysfunction rather than aetiology, with lower levels of vitamin D in alcoholic cirrhosis than in primary biliary cirrhosis.

关键词： Alcoholic liver cirrhosis Child-Pugh score Primary biliary cirrhosis Vitamin D deficiency

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现代等离子切割技术及其智能化

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电焊机 2013年第5期43卷 20-24页

作者： DIRK ott 维克多科技(中国)公司上海201103

介绍了现代等离子切割发展过程,并根据实际应用对等离子切割进行分类。着重阐述等离子切割系统中使用的核心部件和他们各自的特点,包括等离子电源、CNC数控、等离子割枪枪体、以及自动调高技术。通过多年的技术革新,这些部件已经具备相... 详细信息

介绍了现代等离子切割发展过程,并根据实际应用对等离子切割进行分类。着重阐述等离子切割系统中使用的核心部件和他们各自的特点,包括等离子电源、CNC数控、等离子割枪枪体、以及自动调高技术。通过多年的技术革新,这些部件已经具备相当成熟的相互兼容整合的能力。在这些核心部件技术的支持下,在加工不同厚度的各种金属材料时,现代等离子切割系统都可以高效、高质地完成任务。

关键词：等离子切割等离子电源 CNC数控系统

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Localizing human disease genes by statistical association mapping

Localizing human disease genes by statistical association ma...

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中国遗传学会功能基因组学研讨会

作者： Jurg ott Rockefeller University New York Beijing Genomics Institute at Chinese Academy of Sciences

After discussing the principle of genetic association analysis, I will outline different steps that are currently taken for genome-wide association analysis. Problem areas to be discussed are multiple testing and diff...

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Genetic and Non-genetic Determinants of Disease

Genetic and Non-genetic Determinants of Disease

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中国心理学会成立90周年纪念大会暨第十四届全国心理学学术会议

作者： Jurg ott Institute of Psychology Chinese Academy of Sciences

A large number of genetic markers is currently available for associating disease phenotypes with marker *** genome-wide association studies have been carried out to localize genetic risk factors for *** examples include age-related macular degeneration in Caucasian and Asian *** some traits,the existence of multiple genetic risk factors has been shown,which represents a challenge for statistical *** additional difficulty are environmental risk factors such as eating habits and stressful like *** relative influences of genetic and non-genetic risk factors for common traits will be discussed and it will be argued that non-genetic risk factors exert a much stronger influence than genes.

关键词： Disease gene mapping Genetic markers Risk factors for disease

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等离子切割工艺在低合金高强钢上的应用

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电焊机 2014年第5期44卷 15-18页

作者： Dirk ott 张敏维克多科技(中国)公司上海201103

从等离子切割的角度定义高强钢,详细阐述等离子切割工艺在高强钢上应用的适用特性。将等离子切割工艺与另外三种广泛应用的切割工艺进行对比,比较这些切割工艺对下道焊接工艺的影响。分析空气等离子切割工艺HAZ效果、切割质量和切割成... 详细信息

从等离子切割的角度定义高强钢,详细阐述等离子切割工艺在高强钢上应用的适用特性。将等离子切割工艺与另外三种广泛应用的切割工艺进行对比,比较这些切割工艺对下道焊接工艺的影响。分析空气等离子切割工艺HAZ效果、切割质量和切割成本之间的关系,同时描述了高强钢等离子切割的设备要求即等离子切割电源、高度调节和CNC数控系统。

关键词：等离子等离子切割高强钢低合金高强钢

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用于旋转对称三角传感器的一种鲁棒的处理方法(英文)

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仪器仪表学报 2007年第2期28卷 203-211页

作者：王晓嘉高隽王磊张旭东 Eckstein Johannes ott Peter 合肥工业大学计算机与信息学院海尔布隆大学光学工程实验室海尔布隆D-74081.德国海尔布隆大学光学工程实验室

旋转对称三角传感器由于其光学系统的旋转对称性而比其他的传统激光三角传感器具有更好的柔性,将旋转对称三角传感器应用于工业领域,相应的处理方法的性能是至关重要的。为了使传感器在复杂物体表面情况下仍具有较好的性能,我们设计了... 详细信息

旋转对称三角传感器由于其光学系统的旋转对称性而比其他的传统激光三角传感器具有更好的柔性,将旋转对称三角传感器应用于工业领域,相应的处理方法的性能是至关重要的。为了使传感器在复杂物体表面情况下仍具有较好的性能,我们设计了一种用于旋转对称三角传感器的鲁棒的处理方法。首先,分析旋转对称三角传感器图像的特性,这些特性取决于被测物体的表面特性,而这些图像特性将有助于传感器图像的处理方法的设计。其次,用一种由粗到精检测方法实现对传感器图像的处理。提出在精检测中,一种结合了自适应平滑和峰值法的方法,以实现检测的鲁棒性。在实际传感器图像上的实验结果证明,这种处理方法对于来自复杂表面的传感器图像具有很好的鲁棒性,从而提高了传感器的柔性。

关键词：旋转对称三角传感器由粗到精检测 Hough变换自适应平滑

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扩张型心肌病心肌中脂肪酸含量的研究

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中华心血管病杂志 1998年第1期26卷 12-14页

作者：朱宁 WilliamE.Connor GaryY.ott 大连医科大学附属第二医院心内科美国俄勒冈健康科学大学内科

目的为了解扩张型心肌病心肌的生化改变，分析了心肌组织中脂肪酸的成分与含量。方法从心脏移植或意外死亡时取下的新鲜心脏左室前壁中取心肌组织。标本共分三组：扩张型心肌病１０例，冠心病１０例，正常对照１０例。用薄层色谱法分离... 详细信息

目的为了解扩张型心肌病心肌的生化改变，分析了心肌组织中脂肪酸的成分与含量。方法从心脏移植或意外死亡时取下的新鲜心脏左室前壁中取心肌组织。标本共分三组：扩张型心肌病１０例，冠心病１０例，正常对照１０例。用薄层色谱法分离出心肌脂质提取液中磷脂及甘油三酯部分，经毛细管柱气相色谱分析得到各种脂肪酸的相对含量。结果扩张型心肌病组的心肌磷脂中亚油酸与正常对照组比较明显缺乏，为１８．３±０．９％比２５．３±３．０％（Ｐ＜０．０５）；冠心病组的亚油酸含量高于心肌病组但低于正常组。甘油三酯中各脂肪酸含量三组间差异无显著性。结论心肌收缩功能中起重要作用的前列腺素是由亚油酸为前体的花生四烯酸合成的，因此心肌病人亚油酸缺乏，可能影响前列腺素的合成，从而造成收缩功能降低。增加心肌病病人饮食中的亚油酸含量，则有可能对扩张型心肌病的预后产生一定的影响。

关键词：扩张型心肌病心肌脂肪酸

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Localized magnetization reversal processes in cobalt nanorods with different aspect ratios

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Nano Research 2015年第7期8卷 2231-2241页

作者： Marc Pousthomis Evangelia Anagnostopoulou Ioannis Panagiotopoulos Rym Boubekri Weiqing Fang Frederic ott Kahina Ait Atmane Jean-Yves Piquemal Lise-Marie Lacroix Guillaume Viau Universite de Toulouse LPCNO UMR 5215 INSA CNRS UPS 135 av de Rangueil 31077 Toulouse Cedex 4 France Laboratoire Leon Brillouin CEA/CNRS UMR 12 IRAMIS CEA-Saclay 91191 Gifsur Yvette France Department of Materials Science and Engineering University ofloannina Ioannina 45110 Greece Universite Paris Diderot Sorbonne Paris Cite ITODYS CNRS UMR 7086 15 rueJ.-A de Baif 75205 Paris Cedex 13 France

We present results of the synthesis of cobalt nanorods using the polyol process and the mechanism of magnetization reversal. We show that the nucleation step is significantly dependent on the nature of the ruthenium chloride used as the nucleating agent. This allows varying the diameter and aspect ratio of the cobalt nanorods independently. Co nanorods with aspect ratio, mean diameter, and mean length in the ranges ARm =3-16, Din= 7-25 nm, and Lm=30-300 nm, respectively, were produced using this method. X-ray diffraction and electron microscopy showed that a strong discrepancy between the structural coherence and morphological aspect ratio can exist because of stacking faults. The coercivity of assemblies of different nanorods was systematically measured, and the highest values were obtained for the smallest diameter and the largest structural coherence length. Micromagnetic simulations were performed to account for the dependence of the coercive field on the diameter. An important observation is that simple coherent magnetization rotation models do not apply to these magnetic nano-objects. Even for very small diameters （Dm = 5-10 nm） well below the theoretical coherent diameter Dcoh（CO）= 24 nm, we observed inhomogeneous reversal modes dominated by nucleation at the rod edges or at structural defects such as stacking faults. We conclude that, in order to produce high-coercivity materials based on nanowires, moderate aspect ratios of 5-10 are sufficient for providing a structural coherence similar to the morphological aspect ratio. Thus, the first priority should be to avoid the formation of stacking faults within the Co nanowires.

关键词： nanorod nanowire permanent magnets micromagnetic calculations shape anisoteopy

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Water Distribution in the Perspectives of Stakeholders and Water Users in the Tarim River Catchment, Xinjiang, China

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Journal of Water Resource and Protection 2014年第6期6卷 543-555页

作者： Haiyan Peng Niels Thevs Konrad ott Department of Philosophy Christian-Albrecht-University Kiel Kiel Germany Institute of Botany and Landscape Ecology University of Greifswald Greifswald Germany

Many river basins in the arid and semi-arid parts of the world are experiencing water scarcity due to water consumption by agriculture resulting in conflicts between upstream and downstream, conflicts between water users, and degradation of the natural ecosystems. The Tarim Basin, Xinjiang, China, has developed into the world’s most important cotton production region with 8.85% of the world’s production. Under the extremely arid climate with annual precipitation of below 100 mm, the water consumption due to irrigation resulted in water scarcity and conflicts between water users as well as between upstream and downstream. The Tarim river catchment harbors about half of the world’s Populus euphratica riparian forests, which are impacted by water shortage. Starting in the 1990s, a unified water management system with a quota system for water distribution has been set up. We introduce this unified water management system and analyze how the water distribution works in practice. Ecologists and forestry officials claim more water for environmental flow, whereas water management officials give priority to agricultural, industrial, and domestic water use. The water quotas for downstream regions are frequently not fulfilled, especially during the non-flood season in spring and early summer posing a risk to water users. Water users with financial and political advantages gain more water security than others. The water quotas are annual quotas. These quotas should be differentiated into seasonal quotas, in order to enhance water security for the downstream section of the Tarim all year round.

关键词： Water Resource Management Central Asia Water Scarcity Land Use Cotton Environmental Flow

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