检索结果-南通市图书馆

Biochar application to temperate grasslands:challenges and opportunities for delivering multiple ecosystem services

Biochar 2023年第1期5卷 574-584页

作者： Robert W.Brown David R.Chadwick Tom Bott Helen M.West Paul Wilson genevieve R.Hodgins Colin E.Snape Davey L.Jones School of Natural Sciences Bangor UniversityBangorLL572UWGwyneddUK School of Biosciences University of NottinghamSutton BoningtonLoughboroughLE125RDUK Department of Chemical and Environmental Engineering University of NottinghamJubilee CampusNottinghamNG72TUUK Centre for Sustainable Farming Systems Food Futures InstituteSoilsWestMurdoch UniversityMurdochWA6150Australia

Grasslands(natural,semi-natural and improved)occupy approximately one-third of the terrestrial biosphere and are key for global ecosystem service provision,storing up to 30%of soil organic carbon(SOC).To date,most research on soil carbon(C)sequestration has focused on croplands where the levels of native soil organic matter(SOM)are typically low and significant potential exists to replenish SOM ***,with the renewed push to achieve“net zero”C emissions by 2050,grasslands may offer an additional C store,utilising tools such as ***,we critically evaluate the potential for biochar as a technology for increasing grassland C stocks,identifying a number of practical,economic,social and legislative challenges that need to be addressed before the widescale adoption of biochar may be *** critically assess the current knowledge within the field of grassland biochar research in the context of ecosystem service provision and provide opinions on the applicability of biochar as an amendment to different types of grassland(improved,semi-improved and unimproved)and the potential effect on ecosystem provision using a range of application techniques in the topsoil and *** concluded that the key question remains,is it possible for managed grasslands to store more C,without causing a loss in additional ecosystem services?To address this question future research must take a more multidisciplinary and holistic approach when evaluating the potential role of biochar at sequestering C in grasslands to mitigate climate change.

关键词： Pastureland Carbon storage Greenhouse gas emissions Offsetting

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

圈养环境中不同来源成年雄性马麝的行为差异

引用

生态学杂志 2008年第8期27卷 1317-1321页

作者：孟秀祥 genevieve Perkins 杨奇森冯祚建徐宏发中央民族大学生命与环境科学学院北京100081 中国科学院动物研究所北京100080 华东师范大学生命科学学院上海200062

于2004年8月—2005年1月,采用焦点取样和连续记录方法,对甘肃兴隆山自然保护区马麝(Moschus sifanicus)繁育中心的雄性马麝进行了行为取样。按照动物来源,将样本动物区分为野捕雄麝(17头)和圈养繁殖雄麝(6头),记录了静卧及站立凝视等12... 详细信息

于2004年8月—2005年1月,采用焦点取样和连续记录方法,对甘肃兴隆山自然保护区马麝(Moschus sifanicus)繁育中心的雄性马麝进行了行为取样。按照动物来源,将样本动物区分为野捕雄麝(17头)和圈养繁殖雄麝(6头),记录了静卧及站立凝视等12种行为的发生频次,并分别对其在交配季节和非交配季节的行为发生频率进行比较。结果表明,由于圈养环境和管理模式相同,甘肃兴隆山繁育中心的野捕和圈养繁殖马麝的总体行为格局类似,但由于幼年期人工哺乳等因素对其行为发育的影响,野捕雄麝在非交配季节和交配季节的冲突行为的表达频次显著多于圈养繁殖雄麝(P<0.05),而圈养繁殖雄麝在交配季节的亲和行为极显著地多于野捕雄麝(P<0.01)。此外,雄麝在非交配季节的静卧行为发生频次极显著地多于交配季节(P<0.01),而在交配季节的站立凝视、运动和环境探究及冲突的发生频次均极显著地比非交配季节多(P<0.01)。

关键词：马麝圈养雄性来源行为频次

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

Considerations when using the activPAL monitor in field-based research with adult populations

引用

Journal of Sport and Health Science 2017年第2期6卷 162-178页

作者： Charlotte L.Edwardson Elisabeth A.H.Winkler Danielle H.Bodicoat Tom Yates Melanie J.Davies David W.Dunstan genevieve N.Healy diabetes research centre leicester general hospitaluniversity of leicesterLeicester LE5 4PWUK nihr leicester-loughborough diet lifestyleand physical activity biomedical research unitLeicester LE5 4PWUK school of population health the university of queenslandBrisbaneQLD 4006Australia baker idi heart and diabetes institute MelbourneVIC 3004Australia school of exercise and nutrition sciences deakin universityBurwoodVIC 3125Australia department of epidemiology and preventive medicine monash universityMelbourneVIC 3800Australia school of sport science exercise and healththe university of western australiaPerthWA 6009Australia central clinical school monash universityMelbourneVIC 3800Australia school of physiotherapy and exercise science curtin universityPerthWA 6102Australia

Research indicates that high levels of sedentary behavior(sitting or lying with low energy expenditure) are adversely associated with health. A key factor in improving our understanding of the impact of sedentary behavior(and patterns of sedentary time accumulation) on health is the use of objective measurement tools that collect date and time-stamped activity information. One such tool is the activP AL monitor. This thigh-worn device uses accelerometer-derived information about thigh position to determine the start and end of each period spent sitting/lying, standing, and stepping, as well as stepping speed, step counts, and postural transitions. The activP AL is increasingly being used within field-based research for its ability to measure sitting/lying via posture. We summarise key issues to consider when using the activP AL in physical activity and sedentary behavior field-based research with adult populations. It is intended that the findings and discussion points be informative for researchers who are currently using activP AL monitors or are intending to use them. Pre-data collection decisions, monitor preparation and distribution, data collection considerations, and manual and automated data processing possibilities are presented using examples from current literature and experiences from 2 research groups from the UK and Australia.

关键词： populations monitor lying collection accelerometer expenditure Australia stepping currently intended

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

白令海楚科奇海的海冰范围变化特征

引用

冰川冻土 2007年第1期29卷 53-60页

作者：胡宪敏苏洁赵进平 genevieve Hiltebrand 教育部物理海洋实验室中国海洋大学 Duke University Durham NC27708 USA

白令海和楚科奇海位于北极太平洋一侧的海冰外缘线附近,具有较强烈的气冰海相互作用.采用滑动t检验和小波分析方法对白令海和楚科奇海1953—2004年海冰范围的年际变化、年代际变化和总体趋势变化进行分析.结果表明:20世纪70年代后期,海... 详细信息

白令海和楚科奇海位于北极太平洋一侧的海冰外缘线附近,具有较强烈的气冰海相互作用.采用滑动t检验和小波分析方法对白令海和楚科奇海1953—2004年海冰范围的年际变化、年代际变化和总体趋势变化进行分析.结果表明:20世纪70年代后期,海冰范围在白令海存在显著的均值突变现象,而楚科奇海在对应阶段则表现为更明显的变频现象;在突变点前后两个时段里,阿留申低压中心低压加强、核心位置偏移以及对应风场分布的变化是导致白令海海冰范围明显缩小的主要动力原因.楚科奇海海冰范围的年际变化中存在由低频向高频变化的现象,该现象除了在局地气温变化中存在之外,在北冰洋区域风涡度、波弗特海纬向风、东西伯利亚海经向风等动力因素中也有所体现.因此,除热力因素外,动力因素引起的海冰的平流与该变频现象也存在一定的联系.

关键词：白令海楚科奇海海冰范围突变阿留申低压

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

Relationship Between Behavioral Frequency and Reproductive Potential of Female Alpine Musk Deer in Captivity

引用

Agricultural Sciences in China 2008年第12期7卷 1497-1502页

作者： MENG Xiu-xiang Perkins genevieve YANG Qi-sen FENG Zuo-jian XU Hong-fa FENG Jin-chao ZHAO Chang-jie HUI Cen-yi College of Life and Environment Sciences Central University for Nationalities Beijing 100081 P.R.China Institute of Zoology Chinese Academy of Sciences Beijing 100080 P.R.China College of Life Science East China Normal University Shanghai 200062 P.R.China

Between June 2005 and February 2006, focal sampling and all occurrence behavior recording were used to quantify the behavioral patterns of captive female alpine musk deer （Moschus sifanicus） at Xinglongshan Musk Deer Farm, Gansu Province, China. Copulation success was used to differentiate individuals into two groups （successful and unsuccessful） and to provide a basis for behavioral comparisons, throughout both mating （rut） and non mating seasons. The results indicated significant differences between the behavior patterns of successful and unsuccessful females; however, the reproductive season played an important environmental factor. Pooling results across reproductive seasons, successfully copulating females showed significantly higher frequencies of vigilance and lower frequency of feeding behavior as compared with unsuccessfully copulating females. In the non-mating season, unsuccessfully copulating females had higher frequency of self-directed behavior, environment sniffing, and were less aggressive than successful copulating females. Furthermore, females who were successful at copulating also demonstrated tail-pasting behavior; however, this only occurred during the rut season. The results of this study can improve management practices for musk deer farms through increasing mating success and reducing maintenance costs. Furthermore, variation in behavior may also be used as a predictor of copulation success and reproductive potential, whereby females can be grouped and separated according to their reproductive history and past reproduction success.

关键词： alpine musk deer captive female behavioral frequency copulation

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

Composition of the Volatile Components Extracted from the Roots of <i>Scorzonera undulata</i>ssp <i>deliciosa</i>(Guiss) Maire: From Algeria

引用

Green and Sustainable Chemistry 2012年第2期2卷 59-61页

作者： Brahim Harkati Salah Akkal Marie genevieve Dijoux Franca Département de Botanique et Pharmacognosie Faculté de Pharmacie—Ecologie Microbienne CESN ISPB Lyon France Laboratoire de Phytochimie et Analyses Physicochimiques et Biologiques Département de Chimie Faculté de Sciences Exactes Université Mentouri Constantine Constantine Algérie

The chemical composition of the volatile components of the dried roots of Scorzonera undulata ssp deliciosa collected from Algeria was determined by GC and GC/MS. The obtained results showed that the extracted oil contained nine fatty acids. The major compounds were hexadecanoic acid (42.2%), n-tetradecanoic acid (16.1%), 9-octadecenoic acid (7.7%) and 9-hexadecenoic acid (4.5%).

关键词： Asteraceae Scorzonera undulata ssp deliciosa Essential Oil Fatty Acids GC-MS

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

Visual State Feedback Digital Control of a Linear Synchronous Motor using Generic Video-Camera Signal

Visual State Feedback Digital Control of a Linear Synchronou...

引用

第11届国际电机与系统学术会议

作者： Takafumi Koseki genevieve Patterson Takeomi Suzuki The University of Tokyo/Department of Electrical Engineering Chubu Electric Power Company

＜正＞This paper describes an effective way to estimate state variables,such as motor speed and disturbance from visual signal by using a dual sampling rate *** dual sampling rate observer estimates the state variables at every DSP control period and corrects the estimation error at the instant that the measurement signal is *** effectiveness of the observer is verified through simulations and experiments..

关键词：

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

内脏脂肪介导中年雌性大鼠黄体生成素高峰分泌异常的研究

引用

中华生殖与避孕杂志 2019年第6期39卷 477-484页

作者：孙妍 Bauer Jessica 舒君 Neal-Perry genevieve 复旦大学附属妇产科医院上海200011 艾伯特爱因斯坦医学院妇产科学系纽约10461 华盛顿大学医学院妇产科学系西雅图98022

目的研究增龄性内脏脂肪增加可能通过中枢机制介导黄体生成素(LH)分泌异常,探索早期女性生殖衰老发生的相关因素及干预策略。方法阴道涂片法筛选性周期规律的36只中年(9~11个月)雌性Sprage-Dawley大鼠,随机分为减除内脏脂肪(visceral fa... 详细信息

目的研究增龄性内脏脂肪增加可能通过中枢机制介导黄体生成素(LH)分泌异常,探索早期女性生殖衰老发生的相关因素及干预策略。方法阴道涂片法筛选性周期规律的36只中年(9~11个月)雌性Sprage-Dawley大鼠,随机分为减除内脏脂肪(visceral fat removal,VFR)组和假手术组,VFR组大鼠经腹部手术移除内脏(包括卵巢及子宫、肾周及膀胱周围)脂肪,假手术组大鼠于腹部正中切口暴露脏器后即刻缝合。3周后所有大鼠均接受去卵巢手术,术后1周给予外源性激素注射模拟雌激素正反馈。观察并比较大鼠体质量、体脂百分比及葡萄糖耐受情况;经颈静脉插管连续取血测定LH分泌水平;免疫组织化学双标记检测下丘脑促性腺激素释放激素(GnRH)神经元表达c-Fos的百分数;荧光定量PCR检测下丘脑前脑Igf1、Igf1r、Kiss1、Kiss1r、Nr1、Nr2b、Slc17a6和Slc32a1的mRNA表达。结果内脏脂肪移除术后4周,VFR组大鼠外源性激素诱导的总LH分泌量[(4 658.0±1 312.0)μg/L]及LH分泌高峰[(16.0±4.5)μg/L]明显高于假手术组[(1 906.0±241.1)μg/L;P=0.04;(6.1±0.7)μg/L,P=0.03];下丘脑GnRH神经元表达c-Fos百分数(53.9%±4.2%)较假手术组增加了1.4倍(36.2%±5.9%,P=0.01);与术前基线数值相比,大鼠的体质量、体脂百分数及葡萄糖耐受在内脏脂肪移除术后差异无统计学意义(P>0.05);内脏脂肪移除不改变下丘脑前脑Igf1、Igf1r、Kiss1、Kiss1r、Nr1、Nr2b、Slc17a6和Slc32a1的mRNA表达。结论减少内脏脂肪显著增加中年雌性大鼠外源性激素诱导LH高峰分泌及下丘脑GnRH神经元的激活,提示内脏脂肪可能通过中枢调控机制影响雌激素正反馈作用介导女性生殖衰老的发生,减少内脏脂肪可能有助于改善早期生殖衰老的特征表型。

关键词：衰老内脏脂肪雌激素促性腺激素释放激素黄体生成素

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

Exploring Personal Factors That Might Influence the Vulnerability of Construction Employees to Occupational Psychological Disorders

引用

Health 2019年第5期11卷 546-566页

作者： genevieve Ataa Fordjour Albert P. C. Chan Peter Amoah Department of Building and Real Estate The Hong Kong Polytechnic University Hong Kong China Department of Building Technology Kwame Nkrumah University of Science and Technology Kumasi Ashanti Ghana

Personal factors could act as intervening variables between the causes and effects of psychological health conditions of employees. This study focused on six personal intervening factors that were associated with the risks of occupational psychological disorders namely: low self-esteem, negative personality trait, unproductive core beliefs, poor self-concept evaluation on performance, poor relationship with others and poor time management skills. An investigation on the level of severity of these personal intervening factors was conducted involving 150 construction professionals and 150 construction trade workers, who were purposively selected in Ghana. The personal factors that were found to be prevalent among the construction employees were low self-esteem and poor time management skills. Correlation analysis and regression analysis were used to determine the relationships between the personal intervening factors and demographic factors such as the age, educational levels and marital status of the research participants. The results of the study indicated that the age and marital status of the respondents had no significant relationship with any of the personal intervening factors. Personal factors such as personality trait and relationship with others also had no relation with any of the demographic factors analyzed. The educational level of the respondents, however, had a significant relationship with the factors of self-esteem, productive core beliefs, self-evaluation on performance and time management skills. An independent two-sample T-test was used to compare the means of the factors with significant relations. This study revealed that construction employees who were highly educated had better self-esteem and time management skills than those who were less educated. The findings from this study broaden the view of moderators on influential sources of psychological health conditions of employees.

关键词： Occupational Psychology Psychological Disorders Personal Factors Construction Employees Ghanaian Construction

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

Dissociation of inhibited ERK signaling from the anti-amyloidogenic action of synthetic ceramide analogues

Dissociation of inhibited ERK signaling from the anti-amyloi...

引用

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： genevieve Evin Andrew F.Hill Brett Garner Department of Pathology University of MelbourneVIC 3010Australia Department of Biochemistry and Molecular Biology Bio21 InstituteUniversity of MelbourneVIC 3010Australia Illawarra Health and Medical Research Institute School of Biological Sciences University of WollongongNSW 2522Australia

＜正＞Inhibition of glycosphingolipid（GSL） synthesis reduces amyloid-beta（A|3） production in *** studies indicate that glucosylceramide synthase（GCS） inhibitors modulate phosphorylation of extracellular signal-regulated kinase 1/2（ERK） and that the ERK pathway may regulate some aspects of Aβ*** is not clear if there is a causative relationship linking GSL synthesis inhibition,ERK phosphorylation,and Aβ*** we treated CHO cells that constitutively express human wild type amyloid-beta precursor protein（CHO-APP）,and process this to produce Aβ,with GSL-modulating agents to explore this *** found that three related ceramide analogue GSL inhibitors,based on the D-threo-l-phenyl-2-decanoylamino-3-morpholino-l-propanol （PDMP） structure,reduced Aβproduction by CHO-APP cells and in all cases this was correlated with suppression of pERK ***,the L-threo enantiomers of these compounds（that are inferior GSL synthesis inhibitors compared to the D-threo enantiomers） also reduced ERK phosphorylation to a similar extent without altering Aβ*** of ERK activation using either 2-（2-Amino-3-methoxyphenyl）-4H-l-benzopyran- 4-one（PD98059） or l,4-diamino-2,3-dicyano-l,4-bis[2-aminophenylthio]butadiene（U0126） had no impact on Aβproduction and knockdown of endogenous GCS using siRNA reduced cellular GSL levels without suppressing Aβproduction or pERK *** data suggest that the alteration in pERK levels following treatment with these ceramide analogues is not the principal mechanism involved in the inhibition of Aβgeneration,and that the ERK signaling pathway does not play a crucial role in processing APP through the amyloidogenic pathway.

关键词： glycosphingolipid ERK amyloid precursor protein amyloid-beta peptide Alzheimer’s disease

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

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：