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Journal of sport and Health science 2022年第2期11卷 224-233页

作者： sebastian Ludyga manuel mücke Christian Andra markus Gerber Uwe Pühse Department of sport Exercise and HealthUniversity of BaselBasel 4052Switzerland Department of school sport Leipzig UniversityLeipzig 04109Germany

Background:Accumulating evidence suggests that sports participation promotes the development of inhibitory control,but the influences of the sports category and inhibition type still remain *** categorization of sports based on the open-skill(externally paced)and closed-skill(self-paced)continuum allows for the integration of the environment as a factor contributing to sports-related benefits for inhibitory ***:Cross-sectional data from different studies were combined(n=184)to examine the association between open-and closed-skill sports and cognitive control processes related to interference control and response ***(aged 9-14 years)filled in 7-day physical activity recall protocols and completed a stroop Color-Word or a Go/NoGo *** N200,N450,and P300 components of event-related potentials elicited by these tasks were recorded using ***:Partial correlations supported the belief that time spent in open-skill sports was related to higher performance on inhibition ***,path analyses revealed an association between this sports type and a greater negativity in the N200 and N450 amplitudes in both the full sample and group-level *** contrast,no relation was found between sports type and P300 ***:The findings suggest that only the engagement in open-skill sports is associated with more effective conflict monitoring and higher performance on tasks demanding inhibitory control.

关键词： Conflict monitoring Event-related potentials Exercise Go/NoGo stroop Color-Word Physical activity

Preparation and Characterization of Polyurethane Foams from Biomass-Based Polyols Obtained by microwave-Assistant Liquefaction of Wood

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Preparation and Characterization of Polyurethane Foams from ...

在湿度周期性变化条件下结构用大片板的弯曲蠕变

第二届中国林业学术大会——s11木材及生物质资源高效...

作者：郑志锋 Chung Y.hse Key Laboratory of Protection Cultivation and Utilization of Forest Resource in Southwest Country Cooperated by Ministry of Education with Yunnan ProvinceSouthwest Forestry University southern Research station USDA Forest ServicePinevilleLouisiana 71360USA

Polyurethane foams were prepared from the liquefied wood polyols, which was obtained by the liquefaction of southern pine wood in the presence of polyhydric alcohols using microwave-assistant as an energy source. The effects of acid type （sulfuric acid and phosphoric acid） and liquefaction reaction time on the properties of liquefied biomass-based polyols were investigated. The influences of isocyanate index on the properties of polyurethane foams were also discussed, and feasible formulations for preparing liquefied biomass-based polyurethane foams were proposed. The results indicated that the foams prepared from such liquefied wood polyols obtained by microwave-assistant liquefaction exhibited excellent mechanical properties.

关键词： polyurethane foam liquefaction microwave southern pine mechanical properties

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中国人造板 1995年第6期5卷 10-12页

作者： m.C.Yeh R.C.Tang C.Y.hse 王维新

随机定向大片板在周期性湿度变化情况下的弯曲蠕变行为。试件的酚醛胶含量分别为5％和7％。试件受恒定的集中静曲载荷。相对湿度为65％和95％两个条件进行周期变化。周期变化分快、慢两种情况,持续期为100天。温度设定为75F,保持恒温。... 详细信息

随机定向大片板在周期性湿度变化情况下的弯曲蠕变行为。试件的酚醛胶含量分别为5％和7％。试件受恒定的集中静曲载荷。相对湿度为65％和95％两个条件进行周期变化。周期变化分快、慢两种情况,持续期为100天。温度设定为75F,保持恒温。每个湿度变化周期,快周期为2天,慢周期为33天。以美国枫香为原料的板子的抗蠕变性能要好于以栎树为原料的板子。试验表明了在高湿度环境条件下用胶量从5％增加到7％对抗蠕变性能的变化影响。因为材料的松弛,两组试件均出现了大的挠度和大的剩余永久变形。在快周期湿度变化情况下,试件的抗蠕变性能与慢周期的相比较,显得更差。考虑蠕变模量和相对蠕变作为大片板在湿度变化条件下的长期使用性能指标是重要的。本研究成果,可对在湿度周期性变化条件下,结构用大片板在长期工程的应用上提供参考依据。

关键词：蠕变行为周期性变化抗蠕变性能板的弯曲相对湿度周期变化木质复合材料含水率普通刨花板大片刨花

在湿度周期性变化条件下结构用大片板的弯曲蠕变

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中国人造板 1995年第7期5卷 11-14页

作者： m.C.Yeh R.C.Tang C.Y.hse 王维新

3 结果和分析 RH水平对静曲强度的影响。试件按AsTm D—1037的规定,中间加荷测定静曲强度,试验用两组试件,每组为48个(同一条件的试件是12个,两个树种条件和两个用胶量条件,共48个试件),一组试件在RH65％、75F条件下处理至平衡含水率,... 详细信息

3 结果和分析 RH水平对静曲强度的影响。试件按AsTm D—1037的规定,中间加荷测定静曲强度,试验用两组试件,每组为48个(同一条件的试件是12个,两个树种条件和两个用胶量条件,共48个试件),一组试件在RH65％、75F条件下处理至平衡含水率,另一组在RH95％、75F条件下处理至平衡含水率。

关键词：蠕变恢复周期性变化抗蠕变性能板的弯曲不可恢复蠕变周期变化静曲强度瞬时挠度平衡含水率下结构

mammary gland growth and vascularity at parturition and during lactation in primiparous ewes fed differing levels of selenium and nutritional plane during gestation

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Journal of Animal science and Biotechnology 2013年第4期4卷 287-293页

作者： Tammi L Neville Allison m meyer Arshi Reyaz Pawel B Borowicz Dale A Redmer Lawrence P Reynolds Joel s Caton Kimberly A Vonnahme Center for Nutrition and Pregnancy Department of Animal Sciences North Dakota State University

Background： Objectives were to examine the effects of selenium （se） supply and maternal nutritional plane during gestation on mammary gland growth, cellular proliferation, and vascularity at parturition and d 20 of lactation. Rambouillet primiparous ewes （n = 84） were allocated to treatments in a 2 x 3 factorial. Factors were dietary se （adequate se [Ase, 11.5 μg/kg BW] or high se [hse, 77.0 μg/kg BVV]） and nutritional plane （60% IREs], 100% [CON], or 140% [EXC]）. At parturition, lambs were removed and 42 ewes （7/treatment） were necropsied. Remaining ewes were fed a common diet meeting requirements for lactation and mechanically milked twice daily until necropsy on d 20. At both necropsy periods, mammary glands were dissected and tissues harvested. samples were analyzed for RNA, DNA, and protein content, cell proliferation, and vascularity. Where interactions were present （P 〈 0.05）, least squares means from the highest-order interaction are presented. Results： Final body weight of ewes was least （P 〈 0.002） in REs, intermediate for CON, and greatest for EXC, regardless of stage of the ewe at necropsy （parturition or d 20 of lactation）. In ewes necropsied at parturition, mammary glands were heavier （P = 0.02） in EXC compared to REs, with CON intermediate. Concentration of RNA （rag/g） was decreased （P= 0.01） in EXC compared to CON at parturition. There was a tendency （P= 0.07） for a se by nutrition interaction in percentage of cells proliferating where Ase-EXC ewes had greater （P_〈 0.02） number of proliferating cells then all other treatments. mammary vascular area tended （P = 0.08） to be affected by a se by nutrition interaction where Ase-CON had less （P= 0.007） vascular area than hse-CON ewes. In ewes necropsied at d 20 of lactation, the number of alveoli per area was decreased （P 〈- 0.05） in REs compared to CON and EXC-fed ewes. Conclusions： Results of this study indicate that proper maternal nutritional plane during gestation is important for mammary gland develo

关键词： mammary gland Nutrition Proliferation selenium Vascularity