检索结果-南通市图书馆

Compost Input Effect on Dryland Wheat and Forage Yields and Soil Quality

Pedosphere 2018年第3期28卷 451-462页

作者： Francisco J. CALDERON Merle F. VIGIL joseph benjamin United States Department of Agriculture-Agricultural Research Service (USDA-ARS) Central Great Plains Research Station Akron80720 CO( USA)

Organic agricultural systems rely on organic amendments to achieve crop fertility requirements, and weed control must be achieved without synthetic herbicides. Our objective was to determine the crop yield and soil quality as affected by a transition from grass to dryland organic agriculture in the Central Great Plains of North America. This study evaluated three beef feedlot compost(BFC)treatments in 2010–2015 following biennial application rates: 0(control), 22.9, and 108.7 t ha^(-1) on two dryland organic cropping systems: a wheat(Triticum aestivum)-fallow(WF) rotation harvested for grain and a triticale(Triticosecale)/pea(Pisum sativum)-fallow(T/P-F) rotation harvested for forage. The triticale + pea biomass responded positively to the 108.7-t ha^(-1) BFC treatment,but not the 22.9-t ha^(-1) BFC treatment. The wheat biomass was not affected by BFC addition, but biomass N content *** feedlot compost input did not increase wheat grain yields, but had a positive effect on wheat grain Zn content. Soil total C and N contents increased with the rate of 108.7 t ha^(-1) BFC after three applications, but not with 22.9 t ha^(-1) BFC. Soil enzyme activities associated with N and C cycling responded positively to the 108.7-t ha^(-1) BFC treatment. Saturated salts were high in the soil receiving 108.7 t ha^(-1) of BFC, but did not affect crop yields. These results showed that BFC was effective in enhancing forage yields, wheat grain quality, and soil C and N, as well as specific microbial enzymes important for nutrient cycling. However, the large rates of BFC necessary to elicit these positive responses did not increase grain yields, and resulted in an excessive buildup of soil P.

关键词： organic agriculture soil C soil enzyme activity soil N pea triticale

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

Incorporation of Biochar Carbon into Stable Soil Aggregates:The Role of Clay Mineralogy and Other Soil Characteristics

引用

Pedosphere 2017年第4期27卷 694-704页

作者： Charlene N. KELLY joseph benjamin Francisco C. CALDERON Maysoon M. MIKHA David W. RUTHERFORD Colleen E. ROSTAD West Virginia University Division of Forestry and Natural Resources337 Percival HallMorgantownWV 26506USA USDA-ARS Central Great Plains Research Station40335 County RoadGGAkronCO 80720USA U.S.Geological Survey MS 408PO Box 25046Building 95Denver Federal CenterDenverCO 80225USA

Aggregation and structure play key roles in water-holding capacity and stability of *** this study,the incorporation of carbon(C) from switchgrass biochar into stable aggregate size fractions was assessed in an Aridisol(from Colorado,USA) dominated by 2:1 clays and an Alfisol(from Virginia,USA) containing weathered mixed 1:1 and 2:1 mineralogy,to evaluate the effect of biochar addition on soil *** biochar was applied at 4 levels,0,25,50,and 100 g kg^(-1),to the soils grown with wheat in a growth chamber *** changes in soil strength and water-holding capacity using water release curves were *** the Colorado soil,the proportion of soil occurring in large aggregates decreased,with concomitant increases in small size *** changes in aggregate size fractions occurred in the Virginia *** the Colorado soil,C content increased from 3.3 to 16.8 g kg^(-1),whereas in the2 000 μm *** greatest increase(from 6.2 to 22.0 g kg^(-1)) occurred in the 53–250 μm *** results indicated that C was incorporated into larger aggregates in the Virginia soil,but remained largely unassociated to soil particles in the Colorado *** addition had no significant effect on water-holding capacity or strength *** biochar to more weathered soils with high native soil organic content may result in greater stabilization of incorporated C and result in less loss because of erosion and transport,compared with the soils dominated by 2:1 clays and low native soil organic content.

关键词： aggregate size fractions, aggregate stability, mineralogy, soil strength, water-holding capacity, weathered soil

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

Switchgrass Biochar Effects on Plant Biomass and Microbial Dynamics in Two Soils from Different Regions

引用

Pedosphere 2015年第3期25卷 329-342页

作者： Charlene N.KELLY Francisco C.CALDERóN Verónica ACOSTA-MARTíNEZ Maysoon M.MIKHA joseph benjamin David W.RUTHERFORD Colleen E.ROSTAD Western Carolina University Department of Geosciences and Natural Resources331 Stillwell HallCullowheeNC 28723 (USA) U.S.Geological Survey Denver CO 80225 (USA) USDA-ARS Akron CO 80720 (USA) USDA-ARS Lubbock TX 79403 (USA)

Biochar amendments to soils may alter soil function and fertility in various ways, including through induced changes in the microbial community. We assessed microbial activity and community composition of two distinct clayey soil types, an Aridisol from Colorado （CO） in the U.S. Central Great Plains, and an Alfisol from Virginia （VA） in the southeastern USA following the application of switchgrass （Panicum virgatum） biochar. The switchgrass biochar was applied at four levels, 0%,0, 2.5%, 5%, and 10%, approximately equivalent to biochar additions of 0, 25, 50, and 100 t ha^-1, respectively, to the soils grown with wheat （Triticum aestivum） in an eight-week growth chamber experiment. We measured wheat shoot biomass and nitrogen （N） content and soil nutrient availability and N mineralization rates, and characterized the microbial fatty acid methyl ester （FAME） profiles of the soils. Net N mineralization rates decreased in both soils in proportion to an increase in biochar levels, but the effect was more marked in the VA soil, where net N mineralization decreased from -2.1 to -38.4 mg kg^-1. The 10% biochar addition increased soil pH, electrical conductivity, Mehlich- and bicarbonate-extractable phosphorus （P）, and extractable potassium （K） in both soil types. The wheat shoot biomass decreased from 17.7 to 9.1 g with incremental additions of biochar in the CO soil, but no difference was noted in plants grown in the VA soil. The FAME recovery assay indicated that the switchgrass biochar addition could introduce artifacts in analysis, so the results needed to be interpreted with caution. Non-corrected total FAME concentrations indicated a decline by 457o and 34% with 10% biochar addition in the CO and VA soils, respectively, though these differences became nonsignificant when the extraction efficiency correction factor was applied. A significant decline in the fungi：bacteria ratio was still evident upon correction in the CO soil with biochar. Switchgrass biochar had the p

关键词： correction factor extraction efficiency fatty acid methyl ester profile nitrogen mineralization soil microbial community soil nutrient availability wheat

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

Soil Carbon Changes Influenced by Soil Management and Calculation Method

引用

Open Journal of Soil Science 2013年第2期3卷 123-131页

作者： Maysoon M. Mikha joseph G. benjamin Ardell D. Halvorson David C. Nielsen US Department of Agricultural Agricultural Research Service Central Great Research Station Akron USA US Department of Agricultural Agricultural Research Service Northern Plains Soil Plant Nutrient Research Fort Collins USA

Throughout the years, many studies have evaluated changes in soil organic carbon (SOC) mass on a fixed-depth (FD) basis without considering changes in soil mass caused by changing bulk density (ρb). This study evaluates the temporal changes in SOC caused by two factors: 1) changing SOC concentration;and 2) changing equivalent soil mass (ESM) in comparison with FD. In addition, this study evaluates calculating changes in SOC stock over time using a minimum equivalent soil mass (ESMmin) basis from a single sampling event compared with the FD scenario. A tillage [no-tillage (NT) and chisel plow (CP)]-crop rotation (multiple crop and continuous corn), and irrigation (full and delayed)) study was initiated in 2001 on Weld silt loam soil. After seven years, SOC concentration in the 0 - 30 cm depth was 19.7% greater in 2008 compared with 2001. Standardizing the soil mass of 2001 to the ESM of 2008 for each individual treatment showed an average gain in SOC of 5.8 Mg C·ha-1 in 2008 compared with 2001. However, the increase in SOC using ESM was twice the SOC gained with the FD calculation, where some treatments lost SOC after seven years of management. Estimating SOC levels using the ESMmin and, thereby, eliminating the confounding effect of soil ρb indicated that SOC stock was influenced by crop species and their interaction with irrigation, but not by tillage practices. Over all, the ESM calculation appears to be more effective in evaluating SOC stock than the FD calculation.

关键词： Soil Organic Carbon Stock Equivalent Soil Mass Minimum Equivalent Soil Mass Fixed-Depth Management Practices

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

计算机辅助外科(CAS)施行传统性全膝关节置换器械的新技术(英文)

引用

中国矫形外科杂志 2012年第17期20卷 1585-1588页

作者： KANG Yida benjamin joseph Mohd Mashfiqul A.Siddiqui Chin Pak Lin 欧南璐 Department of Orthopaedic Surgery Singapore General Hospital7Hospital Drive 新加坡中央医院矫形外科新加坡169608

[目的]研究应用计算机辅助外科(computer aided surgery,CAS)施行传统性全膝关节置换器械的新技术。[方法]30例膝关节内翻畸形患者,由同一位医师施行传统性全膝关节置换术,术后全部患者行患肢直立位冠状面X线摄影,选其中20例作为研究对... 详细信息

[目的]研究应用计算机辅助外科(computer aided surgery,CAS)施行传统性全膝关节置换器械的新技术。[方法]30例膝关节内翻畸形患者,由同一位医师施行传统性全膝关节置换术,术后全部患者行患肢直立位冠状面X线摄影,选其中20例作为研究对象,评估移植假体位置的正确性程度。[结果]20例患者行X线分析研究,以下列不同角度进行测定,结果分析使用SPSS版本19。冠状轴线:股骨部假体位置沿股骨机械轴线,均值为:2.5°内翻～4.4°外翻(SD 0.33);股骨部假体位置为:2.5°内翻～1.7°外翻(SD 0.23);总的股胫机械轴线角度为:3.2°内翻～4.5°外翻(SD 0.40)。假体组成部分超出±3°内翻/外翻者,胫骨0例,股骨1例。股骨与胫骨机械性轴线超过3°内翻/外翻为3例。以上数据表明膝关节外科能全面取得韧带的平衡。矢状轴线:研究假体置换的矢状轴线最佳位置,尚存在争议。故未作分析。[结论]CAS适用于传统性全膝关节置换术,既不增加患者痛苦,还能进一步完善外科手术技术,使假体移植达到正确位置。

关键词：全膝关节置换术计算机辅助外科(CAS) 传统性手术器械

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

Spastin and alsin protein interactome analyses begin to reveal key canonical pathways and suggest novel druggable targets

引用

Neural Regeneration Research 2025年第3期20卷 725-739页

作者： benjamin R.Helmold Angela Ahrens Zachary Fitzgerald P.Hande Ozdinler Department of Neurology Feinberg School of MedicineNorthwestern UniversityChicagoILUSA Center for Molecular Innovation and Drug Discovery Center for Developmental TherapeuticsChemistry of Life Processes InstituteNorthwestern UniversityEvanstonILUSA Mesulam Center for Cognitive Neurology and Alzheimer’s Disease Feinberg School of MedicineNorthwestern UniversityChicagoILUSA Feinberg School of Medicine Les Turner ALS Center at Northwestern UniversityChicagoILUSA

Developing effective and long-term treatment strategies for rare and complex neurodegenerative diseases is challenging. One of the major roadblocks is the extensive heterogeneity among patients. This hinders understanding the underlying disease-causing mechanisms and building solutions that have implications for a broad spectrum of patients. One potential solution is to develop personalized medicine approaches based on strategies that target the most prevalent cellular events that are perturbed in patients. Especially in patients with a known genetic mutation, it may be possible to understand how these mutations contribute to problems that lead to neurodegeneration. Protein–protein interaction analyses offer great advantages for revealing how proteins interact, which cellular events are primarily involved in these interactions, and how they become affected when key genes are mutated in patients. This line of investigation also suggests novel druggable targets for patients with different mutations. Here, we focus on alsin and spastin, two proteins that are identified as “causative” for amyotrophic lateral sclerosis and hereditary spastic paraplegia, respectively, when mutated. Our review analyzes the protein interactome for alsin and spastin, the canonical pathways that are primarily important for each protein domain, as well as compounds that are either Food and Drug Administration–approved or are in active clinical trials concerning the affected cellular pathways. This line of research begins to pave the way for personalized medicine approaches that are desperately needed for rare neurodegenerative diseases that are complex and heterogeneous.

关键词： ALS2 alsin amyotrophic lateral sclerosis hereditary spastic paraplegia neurodegenerative diseases personalized medicine precision medicine protein interactome protein-protein interactions SPAST spastin

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

Can DyeCycling break the photobleaching limit in single-molecule FRET?

引用

Nano Research 2022年第11期15卷 9818-9830页

作者： benjamin Vermeer Sonja Schmid NanoDynamicsLab Laboratory of BiophysicsWageningen UniversityStippeneng 46708WE WageningenThe Netherlands

Biomolecular systems,such as proteins,crucially rely on dynamic processes at the *** biomolecular nanodynamics is therefore key to obtaining a mechanistic understanding of the energies and molecular driving forces that controlbiomolecular ***-molecule fluorescence resonance energy transfer(smFRET)is a powerful technique to observe inreal-time how a single biomolecule proceeds through its functional cycle involving a sequence of distinct structural ***,this technique is fundamentally limited by irreversible photobleaching,causing the untimely end of the experiment andthus,a narrow temporal bandwidth of≤3 orders of ***,we introduce“DyeCycling”,a measurement scheme withwhich we aim to break the photobleaching limit in *** introduce the concept of spontaneous dye replacement bysimulations,and as an experimental proof-of-concept,we demonstrate the intermittent observation of a single biomolecule forone hour with a time resolution of ***,DyeCycling can provide>100-fold more information per singlemolecule than conventional *** discuss the experimental implementation of DyeCycling,its current and fundamentallimitations,and specific biological use *** its general simplicity and versatility,DyeCycling has the potential torevolutionize the field of time-resolved smFRET,where it may serve to unravel a wealth of biomolecular dynamics by bridgingfrom milliseconds to the hour range.

关键词： biomolecular dynamics single-molecule fluorescence resonance energy transfer(smFRET) photobleaching conformational changes single-molecule kinetics

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

Current advances in Hodgkin’s lymphoma

引用

Chronic Diseases and Translational Medicine 2019年第1期5卷 15-24页

作者： joseph Vadakara benjamin Andrick Department of Hematology and Oncology Geisinger Medical Center Danville PA 17822 USA

Hodgkin’s lymphoma is a highly treatable malignancy. It has high cure rates yet there are many patients who relapse or are refractory to treatment. Traditionally, treatment has been with conventional chemotherapy;however, the development of brentuximab vedotin and immune checkpoint inhibitors has revolutionized the care of Hodgkin’s lymphoma. This is a review of the current advances in the management of Hodgkin’s lymphoma and a review of ongoing clinical trials in the field.

关键词： Hodgkin’s lymphoma Brentuximab vedotin Nivolumab Pembrolizumab Doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD)

来源：

维普期刊数据库

同方期刊数据库

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

Wahi, a discrete global grid gazetteer built using linked open data

引用

International Journal of Digital Earth 2017年第5期10卷 490-503页

作者： benjamin Adams Department of Computer Science Centre for eResearchThe University of AucklandAucklandNew Zealand

Discrete global grid systems have become an important component of Digital Earth ***,previously there has not existed an easy way to map between named places(toponyms)and the cells of a discrete global grid *** lack of such a tool has limited the opportunities to synthesize social place-based data with the more standard Earth and environmental science data currently being analyzed in Digital Earth *** paper introduces Wāhi,the first gazetteer to map entities from the GeoNames database to multiple discrete global grid systems.A gazetteer service is presented that exposes the grid system and the associated gazetteer data as Linked Data.A set of use cases for the discrete global grid gazetteer is discussed.

关键词： Discrete global grid gazetteer linked data place toponym Digital Earth

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

Integrating high levels of variable renewable energy into electric power systems

引用

Journal of Modern Power Systems and Clean Energy 2017年第6期5卷 831-837页

作者： benjamin KROPOSKI National Renewable Energy Laboratory GoldenCO 80401USA

As more variable renewable energy(VRE)such as wind and solar are integrated into electric power systems,technical challenges arise from the need to maintain the balance between load and generation at all *** paper examines the challenges with integrating ultrahigh levels of VRE into electric power system,reviews a range of solutions to these challenges,and provides a description of several examples of ultra-high VRE systems that are in operation today.

关键词： High penetration Variable renewable energy Grid operation Wind Solar

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

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：