检索结果-南通市图书馆

Impact of black cherry on pedunculate oak vitality in mixed forests:Balancing benefits and concerns

Forest Ecosystems 2023年第6期10卷 690-699页

作者： Ellen Desie Bart Muys jan den ouden Bart Nyssen Rita Sousa-Silva Leon van den Berg Arnold van den Burg Gert-jan van Duinen Koenraad Van Meerbeek Maaike Weijters Karen Vancampenhout Division Forest Nature and LandscapeKU Leuven Campus GeelKleinhoefstraat 4B-2240 GeelBelgium Division Forest Nature and LandscapeKU LeuvenCelestijnenlaan 200EBox 2411B-3001 LeuvenBelgium KU Leuven Plant Institute B-3001 LeuvenBelgium Forest Ecology and Management Group Wageningen UniversityP.O.Box 47Wageningenthe Netherlands Bosgroep Zuid-Nederland Huisvenseweg 145591 VD Heezethe Netherlands Young Academy for Sustainability Research University of Freiburg79104 Freiburg im BreisgauGermany Aquatic Ecology&Environmental Biology Radboud University NijmegenHeyendaalseweg 1356525 AJ Nijmegenthe Netherlands Biosphere/Zoological Museum Netherlands Onderlangs 176731 BK Otterlothe Netherlands Stichting Bargerveen Toernooiveld 16525 ED Nijmegenthe Netherlands B-WARE Research Centre/Radboud University Nijmegen Toernooiveld 16525 ED Nijmegenthe Netherlands

The vitality of European forests continues to decline due to new pests and diseases,climate-change related disturbances and high loads of atmospheric nitrogen *** soil health is a major factor underpinning the low vitality of West-European *** tree species with soil ameliorative traits is proposed as an avenue to counteract soil acidification and improve overall forest *** we evaluate the impact of black cherry(Prunus serotina Ehrh.),a known rich litter species,on the vitality of neighboring pedunculate oak(Quercus robur L.)in ten mixed forests on sand in Germany,Belgium and the *** found that black cherry admixture increases foliar N and P to a surplus whereas it causes deficiencies in foliar Mg,thereby resulting in an overall negative effect on oak foliar nutrient ***,defoliation of oak leaves by herbivory decreases with the proximity of black *** structural equation modelling(SEM),we tested the hypothesized‘improved soil health’*** analyses showed that black cherry admixture leads to lower accumulation in the humus layer,resulting in higher soil base saturation which has a positive effect on foliar Ca yet a negative effect on total ***,the SEM illustrated that herbivory of oak leaves decreases when black cherry is admixed,both via dilution and improved soil *** effects of black cherry on oak vitality via“improved soil health”in our SEM are however small in comparison to direct ***,our study showed that the combined positive and negative impacts of black cherry on oak vitality are limited,which tempers the potential benefits of using the rich litter species to counteract oak decline via improved soil health–yet,the concern of black cherry as an invasive alien species negatively affecting the vitality of mature pedunculate oak trees may also be exaggerated.

关键词： Rich litter species Black cherry Nutrient cycling Insect herbivory Dilution effect Humus type Pedunculate oak Plant-soil interaction

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

Jacques Touret(1936-2024)

引用

Geoscience Frontiers 2024年第4期15卷 518-520页

作者： Maria Luce Frezzotti Daniel Harlov jan Marten Huizenga Alfons van den Kerkhof Universitàdegli Studi di Milano-Bicocca MilanoItaly Geo Forschungs Zentrum Potsdam TelegrafenbergPotsdamGermany Norwegian University of Life Sciences ÅsNorway Georg-August Universität Göttingen GöttingenGermany

Jacques Touret(Fig.1)passed away on 11 March 2024 in Paris at the age of 88 after a long *** is survived by his wife Lydie Touret,four children,and 14 *** was a pioneer in the field of fluid inclusions and its applications in high-grade metamorphic *** his retrospective paper in Geoscience Frontiers(Touret,2014),Jacques described himself as someone who dedicated"...a great part of my scientifiic life to the study of minute bubbles in rocks issued from the most extreme depths of our mother Earth".He will be remembered as a very amiable person and his infectious enthusiasm for fluid inclusions.

关键词： someone remember mother

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

Using state space models as a statistical impact measurement of survey redesigns: a case study of the labour force survey of the Australian Bureau of Statistics

引用

Statistical Theory and Related Fields 2019年第2期3卷 224-238页

作者： Xichuan(Mark)Zhang jan A.van den Brakel Siu-Ming Tam Methodology Division Australian Bureau of Statistics(ABS)CanberraAustralia Department of Statistical Methods Statistics Netherlands and Department of Quantitative EconomicsMaastricht University School of Business and EconomicsCanberraAustralia National Institute for Applied Statistics Research Australia University of WollongongCanberraAustralia

The goals of any major business transformation programme in an official statistical agency often include improving data collection efficiency,data processing methodologies and data ***,the achievement of such improvements may have transitional statistical impacts that could be misinterpreted as real-world changes if they are not measured and handled *** paper describes a development work that sought to explore the design and analysis of a times-series experiment that measured the statistical impacts that sometimes occur during survey *** Labour Force Survey(LFS)of the Australian Bureau of Statistics(ABS)was used as a case *** the present study:(1)A large-scale field experiment was designed and conducted that allowed the outgoing and the incoming surveys to run in parallel for some periods to measure the impacts of any changes to the survey process;and(2)The precision of the impact measurement was continuously improved while the new survey design was being *** state space modelling(SSM)technique was adopted as the main approach,as it provides an efficient impact *** approach enabled sampling error structure to be incorporated in the time-series intervention *** approach was also able to be extended to take advantage of the availability of other related data sources(e.g.,the data obtained from the parallel data collection process)to improve the efficiency and accuracy of the impact *** stated above,the LFS was used as a case study;however,the models and methods developed in this study could be extended to other surveys.

关键词： Intervention analysis survey sampling structural time series modelling labour force survey Kalman filter

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

Exploiting biased reptation for continuous flow preparative DNA fractionation in a versatile microfluidic platform

引用

Microsystems & Nanoengineering 2017年第1期3卷 294-301页

作者： Burcu Gumuscu Johan G.Bomer Hans L.de Boer Albert van den Berg jan C.T.Eijkel BIOS Lab-on-a-Chip Group MESA+Institute for NanotechnologyMIRA Institute for Biomedical Technology and Technical MedicineUniversity of Twente7500 AE EnschedeThe Netherlands

A new approach is presented for preparative,continuous flow fractionation of sub-10-kbp DNA fragments,which exploits the variation in the field-dependent mobility of the DNA molecules based on their *** pulsed electric fields of significantly different magnitudes are applied to a microchip filled with a sieving matrix of 1.2% agarose *** this method,we demonstrate a high-resolution separation of 0.5,1,2,5,and 10 kbp DNA fragments within 2 *** the separation,DNA fragments are also purified from other ionic *** fractionation of sub-10-kbp DNA molecules plays an important role in second-generation *** presented device performs rapid high-resolution fractionation and it can be reliably manufactured with simple microfabrication procedures.

关键词： agarose gel biased reptation continuous flow DNA separation DNA purification preparative fractionation

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

A physically active lifestyle is related to a lower level of skin autofluorescence in a large population with chronic-disease(LifeLines cohort)

引用

Journal of Sport and Health Science 2022年第2期11卷 260-265页

作者： Saskia Corine van de Zande Jeroen Klaas de Vries Inge van den Akker-Scheek Johannes Zwerver Andries jan Smit Department of Internal Medicine Division of Vascular MedicineUniversity of GroningenUniversity Medical Center GroningenGroningen9700 RBthe Netherlands Department of Internal Medicine Antonius Hospital SneekSneek8601 ZKthe Netherlands Department of Orthopaedics University of GroningenUniversity Medical Center GroningenGroningen9700 RBthe Netherlands Center for Human Movement Sciences University of GroningenUniversity Medical Center GroningenGroningen9700 RBthe Netherlands Sports Valley Gelderse Vallei HospitalEde6716 RPthe Netherlands

Background:Physical activity(PA)has substantial health benefits and is important in combatting chronic diseases,which have been associated with elevated levels of advanced glycation endproducts(AGEs).AGEs play a role in the aging process,and an association between PA and AGEs has been *** aimed to investigate the relationship between PA and AGE accumulation in a general population and in a population with chronic ***:This large cross-sectional population study used data from adult participants in the LifeLines project,with participant information drawn from the LifeLines database as well data from patients with diabetes mellitus or renal and/or cardiovascular *** AGE accumulation was assessed non-invasively by skin-autofluorescence(SAF)using an AGE reader(DiagnOptics Technologies BV,Groningen,the Netherlands).PA was assessed using the short questionnaire to assess health-enhancing physical activity(SQUASH).Multivariate linear regression analyses were adjusted for age,body mass index,sex,and smoking ***:Data from 63,452 participants(general population n=59,177,chronic disease n=4275)were *** general population was significantly younger(43.58±11.77 years,mean±SD)and had significantly lower SAF(1.90±0.42 arbitrary units(AU))compared to the population with chronic disease(age:55.51±12.07 years;SAF:2.27±0.51 AU).In the group with chronic disease,more hours of moderate to vigorous physical activities per week were associated with lower SAF(β=-0.002,95%confidence interval(95%CI):-0.002 to-0.001).For the general population,there was no association between hours of moderate to vigorous activity and SAF(β=3.2×10^(-5),95%CI:0.000-0.001,p=0.742).However,there was an association in the general population between total hours of PA per week and SAF(β=4.2×10^(-4),95%CI:0.000-0.001,p<0.001),but this association was not found in the chronic disease population(β=-3.2×10^(-4),95%CI:-0.001 to 0.000,p=0.347).Conclusion:Our study demons

关键词： Advanced glycation endproducts Chronic disease population General population Physical activity Skin autofluorescence

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

Large-scale fabrication of highly ordered sub-20 nm noble metal nanoparticles on silica substrates without metallic adhesion layers

引用

Microsystems & Nanoengineering 2018年第1期4卷 380-389页

作者： Hai Le-The Erwin Berenschot Roald M.Tiggelaar Niels R.Tas Albert van den Berg jan C.T.Eijkel BIOS Lab-on-a-Chip Group MESA+Institute for NanotechnologyMIRA Institute for Biomedical Technology and Technical MedicineMax Planck Center for Complex Fluid DynamicsUniversity of TwenteEnschede 7522 NBThe Netherlands Mesoscale Chemical Systems Group MESA+Institute for NanotechnologyUniversity of TwenteEnschede 7522 NBThe Netherlands NanoLab Cleanroom MESA+Institute for NanotechnologyUniversity of TwenteEnschede 7522 NBThe Netherlands

Periodic noble metal nanoparticles offer a wide spectrum of applications including chemical and biological sensors,optical devices,and model catalysts due to their extraordinary *** sensing purposes and catalytic studies,substrates made of glass or fused-silica are normally required as supports,without the use of metallic adhesion ***,precise patterning of such uniform arrays of silica-supported noble metal nanoparticles,especially at sub-100 nm in diameter,is challenging without adhesion *** this paper,we report a robust method to large-scale fabricate highly ordered sub-20 nm noble metal nanoparticles,i.e.,gold and platinum,supported on silica substrates without adhesion layers,combining displacement Talbot lithography(DTL)with dry-etching *** photoresist nanocolumns at diameters of~110 nm are patterned on metal-coated oxidized silicon wafers using DTL,and subsequently transferred at a 1:1 ratio into anti-reflection layer coating(BARC)nanocolumns with the formation of nano-sharp tips,using nitrogen plasma *** BARC nanocolumns are then used as a mask for etching the deposited metal layer using inclined argon ion-beam *** find that increasing the etching time results in coneshaped silica features with metal nanoparticles on the tips at diameters ranging from 100 nm to sub-30 nm,over large areas of 3×3 cm^(2).Moreover,subsequent annealing these sub-30 nm metal nanoparticle arrays at high-temperature results in sub-20 nm metal nanoparticle arrays with~10^(10) uniform particles.

关键词： metallic ordered columns

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

Exchange灾难恢复技巧

引用

Windows IT Pro Magazine（国际中文版） 2006年第7期 67-68,70页

作者： Menko den ouden 刘海蜀(译者)

作为一名Exchange系统管理员，您每天最为担心的恐怕就是灾难性事件发生在Exchange环境中，尤其是在整个企业最为忙碌的那几天。无论您的Exchange环境或大或小，电子邮件服务的失效都会对企业的运营造成重大影响。本文将教会您几个有用... 详细信息

作为一名Exchange系统管理员，您每天最为担心的恐怕就是灾难性事件发生在Exchange环境中，尤其是在整个企业最为忙碌的那几天。无论您的Exchange环境或大或小，电子邮件服务的失效都会对企业的运营造成重大影响。本文将教会您几个有用技巧，帮助您设计、规划、测试和部署一个Exchange灾难恢复方案。

关键词： Exchange 灾难恢复电子邮件服务系统管理员灾难性事件恢复方案环境企业

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

Treatment of acute periprosthetic infections with prosthesis retention: Review of current concepts

引用

World Journal of Orthopedics 2014年第5期5卷 667-676页

作者： Jesse WP Kuiper Robin Tjeenk Willink Dirk jan F Moojen Michel PJ van den Bekerom Sascha Colen Center for Orthopaedic Research Alkmaar Medical Center Alkmaar 1815 JD Alkmaar The Netherlands Department of Surgery Spaarne Hospital2134 TM Hoofddorp The Netherlands Department of Orthopaedic Surgery University Hospitals Leuven Department of Orthopaedic Surgery and Traumatology Onze Lieve Vrouwe Gasthuis 1091 AC Amsterdam The Netherlands Department of Orthopedic Surgery and Traumatology Sint Bonifatius Hospital

Periprosthetic joint infection(PJI) is a devastating complication after total joint arthroplasty, occurring in approximately 1%-2% of all cases. With growing populations and increasing age, PJI will have a growing effect on health care costs. Many risk factors have been identified that increase the risk of developing PJI, including obesity, immune system deficiencies, malignancy, previous surgery of the same joint and longer operating time. Acute PJI occurs either postoperatively(4 wk to 3 mo after initial arthroplasty, depending on the classification system), or via hematogenous spreading after a period in which the prosthesis had functioned properly. Diagnosis and the choice of treatment are the cornerstones to success. Although different definitions for PJI have been used in the past, most are more or less similar and include the presence of a sinus tract, blood infection values, synovial white blood cell count, signs of infection on histopathological analysis and one ormore positive culture results. Debridement, antibiotics and implant retention(DAIR) is the primary treatment for acute PJI, and should be performed as soon as possible after the development of symptoms. Success rates differ, but most studies report success rates of around 60%-80%. Whether single or multiple debridement procedures are more successful remains unclear. The use of local antibiotics in addition to the administration of systemic antibiotic agents is also subject to debate, and its pro's and con's should be carefully considered. Systemic treatment, based on culture results, is of importance for all PJI treatments. Additionally, rifampin should be given in Staphylococcal PJIs, unless all foreign material is removed. The most important factors contributing to treatment failure are longer duration of symptoms, a longer time after initial arthroplasty, the need for more debridement procedures, the retention of exchangeable components, and PJI caused by Staphylococcus(aureus or coagulase nega

关键词： Arthroplasty Prosthesis Infection Periprosthetic joint infection Retention Debridement antibiotics and implant retention Debridement Acute

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

沥青自修复微胶囊研究进展

引用

材料导报 2020年第15期34卷 15092-15101页

作者：何亮黄胡端 Wim Van den bergh Tóth Csaba 高杰 Karol Kowalski jan Valentin 重庆交通大学交通土建材料国家地方联合实验室重庆400074 长安大学特殊地区公路工程教育部重点实验室西安710061 安特卫普大学应用工程学院比利时安特卫普G.Z.352 布达佩斯技术与经济大学土木工程学院匈牙利布达佩斯H-1521 华沙理工大学土木工程学院波兰华沙00-637 捷克理工大学土木工程学院捷克布拉格16629

微胶囊技术在世界上已应用于多个领域,包括医药、食品和化工等,具有广阔的应用前景。将微胶囊引入到沥青材料自修复中,可提高沥青材料的自修复能力并在裂缝产生初期即可自我修复,延长路面使用寿命。与传统的裂缝修补方法相比,微胶囊自... 详细信息

微胶囊技术在世界上已应用于多个领域,包括医药、食品和化工等,具有广阔的应用前景。将微胶囊引入到沥青材料自修复中,可提高沥青材料的自修复能力并在裂缝产生初期即可自我修复,延长路面使用寿命。与传统的裂缝修补方法相比,微胶囊自修复技术具有节能减排、降低养护成本和防止微裂缝扩展至宏观裂缝等优势。然而,沥青自修复微胶囊技术仍处于初步探索阶段,将微米级微胶囊应用于沥青材料自修复领域还存在着微胶囊强度控制范围不够明确,微胶囊破裂理论尚不成熟,且微胶囊制备工艺参数设计尚不统一等问题。因此,研究者们除研究制备工艺的影响外,还主要从选择合适的制备工艺影响参数和微胶囊的结构与性能方面不断尝试,并取得了丰硕的成果。随着制备工艺的不断成熟和影响参数的不断优化,经原位聚合法制备的微胶囊结构致密、性能优良。目前对掺微胶囊的沥青材料自修复的研究仍存在对沥青材料自修复提升效果的评价方法和评价指标尚不统一等问题。掺微胶囊的沥青材料自修复效果主要通过不同的指标来体现,包括延度、复数模量、拉伸强度、试件的载荷和沥青混合料的疲劳寿命等。其中,还对掺微胶囊的沥青混合料进行了路用性能研究。通过不同的评价指标表明,微胶囊显著提升了沥青材料的自修复效果;掺微胶囊的沥青混合料的水稳定性和高温稳定性略有下降,低温抗裂性下降较大,但仍满足规范要求。为总结沥青自修复微胶囊的研究进展,本文对比分析了多种自修复微胶囊制备方法的优势和特点,解析了影响微胶囊质量的主要因素(芯壁比、反应温度、终点pH值、乳化转速、酸化时间),总结了微胶囊的结构与性能的表征方法,介绍了掺微胶囊沥青材料自修复性能的评价方法与提升效果,阐述了微胶囊对沥青混合料路用性能的影响,探讨了借助分子动力学手段研究掺微胶囊的沥青材料自修复行为理论的可行性并展望了其未来发展前景,以期为微米级微胶囊的应用与发展提供参考。

关键词：沥青材料自修复微米级微胶囊制备与性能分子动力学

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

Twenty years of experience with the rabbit model,a versatile model for tracheal transplantation research

引用

Plastic and Aesthetic Research 2016年第1期3卷 223-230页

作者： Margot den Hondt Bart M.Vanaudenaerde Pierre Delaere jan J.Vranckx Department of Plastic and Reconstructive Surgery KU Leuven University Hospitals3000 LeuvenBelgium Department of Clinical and Experimental Medicine Laboratory of PulmonologyLung Transplant UnitKU LeuvenUniversity of Leuven3000 LeuvenBelgium Department of Otolaryngology Head and Neck SurgeryKU Leuven University Hospitals3000 LeuvenBelgium

Pathologies comprising more than half the length of the trachea are a challenge to the reconstructive *** tracheal transplantation techniques aim to offer the patient a curative solution with a sustained improvement in quality of *** review summarizes the authors’experience with the rabbit as a versatile model for research regarding tracheal *** of the segmental blood supply of the trachea,it is not feasible to transplant the organ together with a well-defined vascular *** such,the key element of successful tracheal transplantation is the creation of a new blood *** vascularized construct is created by prelaminating the rabbit trachea heterotopically,within the lateral thoracic *** prelamination,the construct and its vascular pedicle are transferred to the orthotopic position in the *** model has become gold standard because of the advantages of working with rabbits,the anatomy of the rabbit trachea,and the reliability of the lateral thoracic artery *** this paper,the key elements of surgery in the rabbit are discussed,as well as the tracheal anastomosis and the harvest of the lateral thoracic artery *** tips and tricks are *** data described in this review represent the fundaments of ongoing translational research in the center over the past twenty years.

关键词： Trachea transplantation rabbit lateral thoracic artery flap prelamination prefabrication

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：