检索结果-南通市图书馆

Effect of asymmetric rolling under high friction coefficient on recrystallization texture and plastic anisotropy of AA1050 alloy

引用

Transactions of Nonferrous Metals Society of China 2019年第11期29卷 2262-2272页

作者： Bianca.Delazari ZANCHETTA Vanessa.Karoline DA.SILVA Vitor.Luis.SORDI josébenaque rubert Andrea Madeira KLIAUGA Graduation Program in Materials Science Federal University of Sao CarlosRod.Joao Leme dos Santos km 11018052-780 SorocabaBrazil Department of Materials Engineering Federal University of Sao CarlosRod.Washington Luis km 23513565-905 Sao CarlosBrazil Department of Mechanical Engineering Federal University of Sao CarlosRod.Washington Luiskm 23513565-905 Sao CarlosBrazil

In asymmetric rolling(ASR) the circumferential velocities of the working rolls are different. This yields a complex deformation mode with shear, compression and rigid body rotation components. The main microstructural modification is on crystallographic texture, and, for aluminium alloys, this may improve the deformability after recrystallization. This work correlated the process variables, thickness reduction per pass(TRP) and velocity ratio between the upper and bottom rolls, with the texture development and the plastic properties after annealing. Finite element(FE) simulations were performed to quantify the influence of the strain components. Experimental data on texture, and plastic anisotropy were analyzed. In the sheet centre a crystallographic rotation of the compression components about the TD(transverse direction) axis was obtained, which yielded the development of {111}//ND(normal direction) texture components. On the surfaces the local variation of the velocity gradients caused an extra rotation component about ND. This yielded the increment of rotated cube components. After annealing the main texture components at the sheet centre were maintained and the texture intensity decreased. The planar anisotropy(△r) was reduced but the normal anisotropy and deep drawability obtained by the Erichsen test were similar for all conditions. The most favourable reduction of △r was obtained at a velocity ratio of 1.5 and TRP of 10%.

关键词： asymmetric rolling aluminium alloy X-ray diffraction finite element analysis stress/strain measurements plasticity

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

Growth and chemical responses of trembling aspen to simulated browsing and ungulate saliva

引用

Journal of Plant Ecology 2016年第4期9卷 474-484页

作者： Ken Keefover-Ring Kennedy F.rubert-Nason Alison E.Bennett Richard L.Lindroth Department of Entomology University of Wisconsin-Madison1630 Linden Dr.MadisonWI 53706USA The James Hutton Institute InvergowrieDundee DD25DAScotlandUK

Aims Woody plant-browser systems represent an understudied facet of *** subjected four genotypes of trembling aspen to artificial browsing,similar to that of a large mammalian herbivore,and applied deer saliva to clipped and unclipped trees to assess:(i)the effects of artificial browsing on aspen growth and phytochemistry of leaves and stems,(ii)genotypic variation in responses and(iii)potential alterations of responses by mammalian *** Potted aspen trees were grown outdoors on the University of Wisconsin-Madison *** experiment consisted of a fullycrossed,2×2×4 randomized complete block design,with two levels of artificial browsing(unclipped and clipped),two levels of saliva application(no saliva and saliva)and four aspen *** simulate ungulate browsing damage,we removed the upper 50%of the stem of half of the trees by pinching the stem with needle-nosed pliers and then separating it by *** half of the damaged trees,we immediately swabbed the wound with deer *** in the unclipped plus saliva treatment were swabbed with saliva at the 50%height *** assess the effects of clipping and saliva application,we harvested all trees after 2 months and measured various growth and chemical *** measurements included height,vertical growth,mass of leaves,stems and roots,leaf number and area and bud *** parameters included defensive,nutritional and structural components of both foliage and *** Findings Clipping affected most of the growth parameters measured,decreasing tree height,leaf,stem,root and total tree mass and leaf *** trees had greater vertical growth,more leaves and higher specific leaf area(SLA)than unclipped *** saliva had little to no effect on plant growth response to the clipping *** budset was delayed by clipping and varied among genotypes but not in response to saliva *** also affected most of the phytochemical variables measure

关键词： ungulate browsing deer saliva defensive chemistry genetic variation Populus tremuloides tolerance

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

Production of Volatile Moth Sex Pheromones in Transgenic Nicotiana benthamiana Plants

引用

BioDesign Research 2021年第1期2021卷 79-95页

作者： Rubén Mateos-Fernández Elena Moreno-Giménez Silvia Gianoglio Alfredo Quijano-Rubio jose Gavaldá-García Lucía Estellés Alba rubert joséLuis Rambla Marta Vazquez-Vilar Estefanía Huet Asunción Fernández-del-Carmen Ana Espinosa-Ruiz Mojca Juteršek Sandra Vacas Ismael Navarro Vicente Navarro-Llopis Jaime Primo Diego Orzáez Institute for Plant Molecular and Cell Biology(IBMCP) Consejo Superior de Investigaciones Científicas(CSIC)-Universidad Politécnica de Valencia(UPV)ValenciaSpain Jaume I University Castellon de la PlanaSpain Department of Biotechnology and Systems Biology National Institute of BiologyLjubljanaSlovenia Jožef Stefan International Postgraduate School LjubljanaSlovenia Centro de Ecología Química Agrícola Instituto Agroforestal del MediterráneoUniversitat Politècnica de ValènciaValenciaSpain Ecología Y Protección Agrícola SL ValenciaSpain

Plant-based bioproduction of insect sex pheromones has been proposed as an innovative strategy to increase the sustainability of pest control in ***,we describe the engineering of transgenic plants producing(Z)-11-hexadecenol(Z11-16OH)and(Z)-11-hexadecenyl acetate(Z11-16OAc),two main volatile components in many Lepidoptera sex pheromone *** assembled multigene DNA constructs encoding the pheromone biosynthetic pathway and stably transformed them into Nicotiana benthamiana *** constructs contained the Amyelois transitella AtrΔ11 desaturase gene,the Helicoverpa armigera fatty acyl reductase HarFAR gene,and the Euonymus alatus diacylglycerol acetyltransferase EaDAct gene in different *** the pheromone-producing plants showed dwarf phenotypes,the severity of which correlated with pheromone *** but one of the recovered lines produced high levels of Z11-16OH,but very low levels of Z11-16OAc,probably as a result of recurrent truncations at the level of the EaDAct *** one plant line(SxPv1.2)was recovered that harboured an intact pheromone pathway and which produced moderate levels of Z11-16OAc(11.8μg g^(-1) FW)and high levels of Z11-16OH(111.4μg g^(-1)).Z11-16OAc production was accompanied in SxPv1.2 by a partial recovery of the dwarf ***1.2 was used to estimate the rates of volatile pheromone release,which resulted in 8.48 ng g-1 FW per day for Z11-16OH and 9.44 ng g^(-1 )FW per day for *** results suggest that pheromone release acts as a limiting factor in pheromone biodispenser strategies and establish a roadmap for biotechnological improvements.

关键词： release dwarf transformed

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

用V形块或球形块测量圆柱形零件

引用

国外计量 1975年第1期 16-20页

作者： M.P.rubert 合肥工大量仪教研室

在工具室、检验室和计量室、机床上和车间里广泛使用着 V 形块。但本文只讨论用 V 形块测量圆度,即当圆柱形零件在 V 形块上或在新近采用的球形块上旋转时,测量它的圆度误差。某些研究结论对 V 形块其它用途也可能是适合的。使圆柱体在... 详细信息

在工具室、检验室和计量室、机床上和车间里广泛使用着 V 形块。但本文只讨论用 V 形块测量圆度,即当圆柱形零件在 V 形块上或在新近采用的球形块上旋转时,测量它的圆度误差。某些研究结论对 V 形块其它用途也可能是适合的。使圆柱体在 V 形块上旋转以便检测其圆度,是车间里最普遍采用的一种实践方法。但由这种方法

关键词：磨损微粒粗度球形接触面积弹性变形弹性形变表面磨损塑性变形范性变形圆柱形 Ra 摩擦材料摩阻材料

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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

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

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：