检索结果-南通市图书馆

The impact of height-adjustable desks and classroom prompts on classroom sitting time,social,and motivational factors among adolescents

引用

Journal of Sport and Health Science 2023年第1期12卷 97-105页

作者： Bronwyn Sudholz Ana Marıa Contardo Ayala Anna Timperio david w.Dunstan david E.Conroy Gavin Abbott Bernie Holland Lauren Arundell Jo Salmon Pomegranate Community Mental Health St John of God Social OutreachBallaratVIC 3350Australia Institute for Physical Activity and Nutrition(IPAN) School of Exercise and Nutrition SciencesDeakin UniversityGeelongVIC 3128Australia Physical Activity Laboratory Baker Heart and Diabetes InstituteMelbourneVIC 3004Australia Mary MacKillop Institute for Health Research Australian Catholic UniversityMelbourneVIC 3000Australia Department of Kinesiology Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Preventive Medicine Northwestern UniversityChicagoIL 60611USA The Australian Council for Health and Physical Education and Recreation AbbotsfordVIC 3067Australia

Purpose:This quasi-experimental study examined the impact of height-adjustable desks in combination with prompts to break up prolonged sitting time during class time and identified social and motivational factors associated with breaking up sitting time among ***’perceptions of strategies were also ***:Over 17 weeks,1 classroom in a government secondary school in Melbourne,Australia,was equipped with 27 height-adjustable desks and prompts(posters and desk stickers)to break up classroom sitting *** received professional development in the use of the desks and *** group of adolescents(n=55)had 2-5 lessons/week using the height-adjustable desks in an intervention classroom,and a comparison group matched by year level and subject(n=50)was taught in traditional“seated”*** wore an activPAL monitor at baseline(T0),4 weeks(T1),and 17 weeks(T2)and completed a survey at T0 and *** teachers participated in interviews at *** sizes were calculated(d).Results:Linear mixed models found that,compared to the traditional“seated”classrooms,the adolescents in the intervention classroom had significantly lower sitting time(T1:-9.7 min/lesson,d=-0.96;T2:-6.7 min/lesson,d=-0.70)and time spent in sitting bouts>15 min(T2:-11.2 min/lesson,d=-0.62),and had significantly higher standing time(T1:7.3 min/lesson,d=0.84;T2:5.8 min/lesson,d=0.91),number of breaks from sitting(T1:1.3 breaks/lesson,d=0.49;T2:1.8 breaks/lesson,d=0.67),and stepping time(T1:2.5 min/lesson,d=0.66).Intervention classroom adolescents reported greater habit strength(d=0.58),self-efficacy for breaking up sitting time(d=0.75),and indicated that having a teacher/classmate remind them to stand as helpful(d=0.50).Conclusion:This intervention shows promise for targeting sitting behaviors in the classroom and indicates that incorporating social and motivational strategies may further enhance outcomes.

关键词： Adolescent School Sedentary behavior Sitting Standing

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

Reduction of Cd in Rice through Expression of OXS3-like Gene Fragments

引用

Molecular Plant 2016年第2期9卷 301-304页

作者： wang, Changhu Guo, weili Ye, Shan wei, Pengcheng Ow, david w. Chinese Acad Sci South China Bot Garden Plant Gene Engn Ctr 723 Xingke Rd Guangzhou 510650 Guangdong Peoples R China Anhui Acad Agr Sci Inst Rice Res Hefei 230031 Peoples R China

Dear Editor,Cadmium （Cd） is a toxic heavy metal and carcinogen, and its en- try into the food chain has serious effects on food security and public health （Uraguchi et al., 2011）. As rice is a staple food crop for half of the world＇s population, Cd in rice grain has become a major source of dietary Cd for this part of the world.

关键词： Cadmium Rice -- Research Gene expression

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

Does light-intensity physical activity moderate the relationship between sitting time and adiposity markers in adolescents?

引用

Journal of Sport and Health Science 2022年第5期11卷 613-619页

作者： Ana María Contardo Ayala Jo Salmon david w.Dunstan Lauren Arundell Anna Timperio Institute for Physical Activity and Nutrition(IPAN) School of Exercise and Nutrition SciencesDeakin UniversityGeelongVIA 3125Australia Physical Activity Laboratory Baker Heart and Diabetes InstituteMelbourneVIA 3004Australia Mary MacKillop Institute for Health Research Australian Catholic UniversityMelbourneVIA 3000Australia

Background:while the relationship between sedentary time and adiposity markers may be independent of moderate-to-vigorous intensity physical activity(MVPA) among adolescents,little is known about the role of light-intensity physical activity(LIPA) in this *** aim of this cross-sectional study was to examine whether device-measured LIPA and MVPA moderate the associations between objectively measured sitting time and adiposity markers(body mass index(BMI)) and waist circumference(wC)) among ***:This study included accelerometer and inclinometer data obtained from 219 adolescents(age=14.9±1.6 years,mean± SD),collected during 2014 and 2015 in Melbourne,*** GT3 X accelerometers were used to determine time spent in total-LIPA(101 counts/min to 3.99 metabolic equivalents(METs)) was dichotomized into low-LIPA(101-799 counts/min) and high LIPA(800 counts/min to 3.99 METs),and MVPA(> 4 METs).The average time spent sitting was obtained from activPAL *** measures were assessed by trained *** between sitting and total-LIPA,low-LIPA,high-LIPA,and MVPA on BMI z-score(zBMI) and wC z-score(zwC),respectively,were examined using linear regression,adjusting for age and sex;and moderation by total-LIPA,low-LIPA,high-LIPA,and MVPA were examined by adding interaction *** interaction effects were probed by comparing associations at the mean and at 1 SD below and above the ***:Total-LIPA significantly moderated the association between sitting time and zBMI,and low-LIPA significantly moderated the association between sitting time and zBMI and *** other associations were found for total-LIPA,high-LIPA,or ***,at high levels of total-LIPA(+1 SD),there is a negative association between sitting time and *** addition,at high levels of low-LIPA(+1 SD),there is a negative association between sitting time and zBMI and ***:Associations between sitting and adiposit

关键词： Adolescents Anthropometric measures Obesity Physical activity Sedentary behavior Sitting time

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

Tourism dependence and poverty alleviation thresholds in Chinese ethnic tourism

引用

Journal of Mountain Science 2022年第10期19卷 3026-3036页

作者： LI Ya-juan OUYANG Chen-xing ZHOU Sheng-yu YU Hu KNIGHT w david wuhan Branch of China Tourism Academy Central China Normal UniversityWuhan 430079China College of Urban and Environmental Science Central China Normal UniversityWuhan 430079China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Human Dimensions of Natural Resources Colorado State UniversityFort Collins 80523USA

Questions persist on the relationship between tourism dependence and economic growth in ethnic tourism *** study addresses such gaps by constructing a threshold regression model based on socio-economic data from 2006 to 2019 for nine sites in Enshi Prefecture of central *** GIS and other open-source data were also used to visualize changing tourism resources in the *** suggest that tourism dependence(the ratio of tourism-based GDP to overall GDP)significantly promotes economic growth in ethnic minority ***,the positive influence of tourism dependence on economic growth appears dynamic and non-linear–rising at first before falling when tourism dependence exceeded a threshold of 34%,with effects varying by site and *** and findings make crucial theoretical contributions to understanding tourism dependence and poverty alleviation *** paper also highlights the importance of political support and balanced investment in diverse industries to minimize decreasing returns beyond tourism dependence thresholds in destinations worldwide.

关键词： Ethnic tourism Tourism dependence Economic growth Threshold effects Poverty alleviation Threshold regression model

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

Versatile domain mapping of scanning electron nanobeam diffraction datasets utilising variational autoencoders

引用

npj Computational Materials 2023年第1期9卷 2213-2230页

作者： A.Bridger w.I.F.david T.J.wood M.Danaie K.T.Butler Inorganic Chemistry Laboratory University of OxfordOxford OX13QRUK ISIS Neutron and Muon Spallation Source STFC Rutherford Appleton LaboratoryOxfordshire OX110QXUK Electron Physical Science Imaging Centre Diamond Light Source Ltd.DidcotUK School of Engineering and Materials Science Queen Mary University of LondonMile End RoadLondon E14NSUK

Characterisation of structure across the nanometre scale is key to bridging the gap between the local atomic environment and macro-scale and can be achieved by means of scanning electron nanobeam diffraction(SEND).As a technique,SEND allows for a broad range of samples,due to being relatively tolerant of specimen thickness with low electron ***,coupled with the capacity for automation of data collection over wide areas,allows for statistically representative probing of the *** paper outlines a versatile,data-driven approach for producing domain maps,and a statistical approach for assessing their *** workflow utilises a Variational AutoEncoder to identify the sources of variance in the diffraction signal,and this,in combination with clustering techniques,is used to produce domain *** approach is agnostic to domain crystallinity,requires no prior knowledge of crystal structure,and does not require simulation of a library of expected diffraction patterns.

关键词： mapping beam dosage

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

Chloramine demand estimation using surrogate chemical and microbiological parameters

引用

Journal of Environmental Sciences 2017年第7期29卷 1-7页

作者： Sina Moradi Sanly Liu Christopher w.K.Chow John van Leeuwen david Cook Mary Drikas Rose Amal School of Chemical Engineering The University of New South Wales Australian water Quality Centre SA Water Corporation Centre for water Management and Reuse School of Natural and Built EnvironmentsUniversity of South Australia

A model is developed to enable estimation of chloramine demand in full scale drinking water supplies based on chemical and microbiological factors that affect chloramine decay rate via nonlinear regression analysis *** model is based on organic character（specific ultraviolet absorbance（SUVA）） of the water samples and a laboratory measure of the microbiological（Fm） decay of *** applicability of the model for estimation of chloramine residual（and hence chloramine demand） was tested on several waters from different water treatment plants in Australia through statistical test analysis between the experimental and predicted *** showed that the model was able to simulate and estimate chloramine demand at various times in real drinking water *** elucidate the loss of chloramine over the wide variation of water quality used in this study,the model incorporates both the fast and slow chloramine decay *** significance of estimated fast and slow decay rate constants as the kinetic parameters of the model for three water sources in Australia was *** was found that with the same water source,the kinetic parameters remain the *** modelling approach has the potential to be used by water treatment operators as a decision support tool in order to manage chloramine disinfection.

关键词： Chloramine demand Drinking water treatment plants Modelling

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

Vascular endothelial growth factor:a double-edged sword in the development of white matter lesions

引用

Neural Regeneration Research 2025年第1期20卷 191-192页

作者： Narek Manukjan Daniel Fulton Zubair Ahmed wMatthijs Blankesteijn Sébastien Foulquier Department of Pharmacology and Toxicology Maastricht UniversityMaastrichtThe Netherlands CARIM-School for Cardiovascular Diseases Maastricht UniversityMaastrichtThe Netherlands Neuroscience and Ophthalmology Institute of Inflammation and AgeingUniversity of BirminghamEdgbastonBirminghamUK Centre for Trauma Sciences Research University of BirminghamEdgbastonBirminghamUK MHeNs-School for Mental Health and Neuroscience Maastricht UniversityMaastrichtThe Netherlands Department of Neurology Maastricht University Medical CenterMaastrichtThe Netherlands

As the population ages,the burden of age-related diseases becomes ***,over 55 million people suffer from dementia worldwide,with Alzheimer’s disease being the most common ***,it is becoming clearer that underlying vascular pathology such as cerebral small vessel disease(cSVD)may be a more detrimental cause for dementia(Cuadrado-Godia et al.,2018).It is estimated that 10%-30%of the elderly population and 35%-90%of all dementia patients exhibit signs of *** term cSVD refers to pathology affecting the small vessels of the brain,which can lead to lacunar cerebral infarcts,enlarged perivascular spaces,and cortical hemorrhages(Cuadrado-Godia et al.,2018).CSVD is often associated with cognitive decline,gait problems,and dementia(Cuadrado-Godia et al.,2018).

关键词： pathology becoming white

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

Developing a chloramine decay index to understand nitrification:A case study of two chloraminated drinking water distribution systems

引用

Journal of Environmental Sciences 2017年第7期29卷 170-179页

The management of chloramine decay and the prevention of nitrification are some of the critical issues faced by water utilities that use chloramine as a *** this study,potential association between high performance size exclusion chromatography（HPSEC）data obtained with multiple wavelength Ultraviolet（UV） detection from two drinking water distribution systems in Australia and nitrification occurrence was *** increase in the absorbance signal of HPSEC profiles with UV detection at λ = 230 nm between apparent molecular weights of 200 to 1000 Da was observed at sampling sites that experienced rapid chloramine decay and nitrification while its absorbance signal at λ =254 nm decreased.A chloramine decay index（C.D.I） defined as the ratio of area beneath the HPSEC spectra at two different wavelengths of 230 and 254 nm,was used in assessing chloramine decay *** *** of waters at locations that experienced nitrification were consistently higher than locations not experiencing nitrification.A simulated laboratory study showed that the formation of nitrite/nitrate and/or soluble microbial products and/or the release of extracellular polymeric substances（EPS） during nitrification may contribute to the *** findings suggest that C.D.I derived from HPSEC with multiple wavelength UV detection could be an informative index to track the occurrence of rapid chloramine decay and nitrification.

关键词： HPSEC water distribution systems Nitrification Chloramine decay

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

Effects of cowpea(Vigna unguiculata) root mucilage on microbial community response and capacity for phenanthrene remediation

引用

Journal of Environmental Sciences 2015年第7期27卷 45-59页

作者： Ran Sun Richard w.Belcher Jianqiang Liang Li wang Brian Thater david E.Crowley Gehong wei State Key Laboratory of Crop Stress Biology in Arid Areas College of Life Sciences Northwest A&F University Department of Environmental Sciences University of California at Riverside

Biodegradation of polycyclic aromatic hydrocarbons（PAHs） is normally limited by their low solubility and poor bioavailability. Prior research suggests that biosurfactants are synthesized as intermediates during the production of mucilage at the root tip. To date the effects of mucilage on PAH degradation and microbial community response have not been directly examined. To address this question, our research compared 3 cowpea breeding lines（Vigna unguiculata） that differed in mucilage production for their effects on phenanthrene（PHE） degradation in soil. The High Performance Liquid Chromatography results indicated that the highest PHE degradation rate was achieved in soils planted with mucilage producing cowpea line C1, inoculated with Bradyrhizobium, leading to 91.6% PHE disappearance in 5 weeks. In root printing tests, strings treated with mucilage and bacteria produced larger clearing zones than those produced on mucilage treated strings with no bacteria or bacteria inoculated strings. Experiments with14C-PHE and purified mucilage in soil slurry confirmed that the root mucilage significantly enhanced PHE mineralization（82.7%）, which is 12% more than the control treatment without mucilage. The profiles of the PHE degraders generated by Denaturing gradient gel electrophoresis suggested that cowpea C1, producing a high amount of root mucilage, selectively enriched the PHE degrading bacteria population in rhizosphere. These findings indicate that root mucilage may play a significant role in enhancing PHE degradation and suggests that differences in mucilage production may be an important criterion for selection of the best plant species for use in phytoremediation of PAH contaminated soils.

关键词： Bioremediation Mucilage Phytoremediation PAH mineralization Rhizosphere

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

Machine-learned multi-system surrogate models for materials prediction

引用

npj Computational Materials 2019年第1期5卷 702-707页

作者： Chandramouli Nyshadham Matthias Rupp Brayden Bekker Alexander V.Shapeev Tim Mueller Conrad w.Rosenbrock Gábor Csányi david w.wingate Gus L.w.Hart Department of Physics and Astronomy Brigham Young UniversityProvoUT 84602USA Fritz Haber Institute of the Max Planck Society Faradayweg 4–614195 BerlinGermany Skolkovo Institute of Science and Technology Skolkovo Innovation CenterBuilding 3Moscow 143026Russia Department of Materials Science and Engineering Johns Hopkins UniversityBaltimoreMD 21218USA Engineering Laboratory University of CambridgeTrumpington StreetCambridge CB21PZUK Computer Science Department Brigham Young UniversityProvoUT 84602USA Citrine Informatics 702 Marshall StreetRedwood CityCA 94063USA

Surrogate machine-learning models are transforming computational materials science by predicting properties of materials with the accuracy of ab initio methods at a fraction of the computational *** demonstrate surrogate models that simultaneously interpolate energies of different materials on a dataset of 10 binary alloys(AgCu,AlFe,AlMg,AlNi,AlTi,CoNi,CuFe,CuNi,FeV,and NbNi)with 10 different species and all possible fcc,bcc,and hcp structures up to eight atoms in the unit cell,15,950 structures in *** find that the deviation of prediction errors when increasing the number of simultaneously modeled alloys iswere found to qualitatively agree on the prediction errors of formation enthalpy with relative errors of<2.5% for all systems.

关键词： alloys prediction CoNi

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

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

在线全文

在线全文

在线全文

在线全文

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

在线全文

在线全文

在线全文

在线全文

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：