检索结果-南通市图书馆

Comparative Study of the Effects of Thermal and Photochemical Accelerated Oxidations on Quality of “Green Type” and “Black Type” French Olive Oils

引用

American journal of Analytical Chemistry 2016年第12期7卷 890-907页

作者： jérôme plard Yveline Le Dréau Catherine rébufa Nathalie Dupuy Aix Marseille Université CNRS IRD Avignon Universit&eacute IMBE UMR 7263 &eacute quipe BEC case 451 Avenue Escadrille Normandie Ni&eacute men 13397 Marseille cedex 20 France

Oxidative stability of two commercial olive oils of different specificity (green type and black type) has been studied during thermal and photochemical accelerated processes through the evolution of quality indices. It might help to assure a good utilisation of olive oil. In most of works described in literature, they are measured individually. In this study, a Principal Component Analysis (PCA) has been performed to emphasize their variation and describe in concise way the quality and the safety of extra-virgin olive oil after two oxidative stresses. No difference had been detected between both type oils when they are heated. Peroxides, aldehydes and conjugated dienes and trienes were formed but rapidly degraded into final oxidation compounds, mainly acid compounds. During the photochemical process, similar changes occurred slower and the green type oil had shown better stability because of its higher phenolic content. The fatty acids had been more impacted (higher disappearance of monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA)) when the oils were heated than when irradiated. Saturated fatty acids (SFA), MUFA and PUFA were the most relevant indicators to characterize non-oxidized oils and PV characterized the early stage of oil oxidation.

关键词： Olive Oil Photo-Oxidation Thermal Oxidation Quality Control Parameters Fatty Acids Phenolic Compounds

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

Interface Characteristics of Silicon Carbide Particles reinforced Aluminum Composites:Experimental Investigation and Finite Element Simulation

Interface Characteristics of Silicon Carbide Particles Reinf...

引用

作者： Yves-Marie plard 上海交通大学

学位级别：硕士

随着对金属基复合材料的需求不断增加,以及高力学性能和各向同性的要求,许多研究人员对铝基复合材料进行了实验。本研究建立了模型来了解碳化硅（SiC）颗粒增强铝基复合材料的界面行为。碳化硅颗粒对碳化硅/铝复合材料力学性能的影响取... 详细信息

随着对金属基复合材料的需求不断增加,以及高力学性能和各向同性的要求,许多研究人员对铝基复合材料进行了实验。本研究建立了模型来了解碳化硅（SiC）颗粒增强铝基复合材料的界面行为。碳化硅颗粒对碳化硅/铝复合材料力学性能的影响取决于颗粒的体积分数,分布和大小,同时也取决于显著影响复合材料特性的增强体/基体界面。因此,提取界面特征是至关重要的,它让我们能够预测复合材料的失效机理。本研究的目的是探讨碳化硅颗粒和铝基体之间不同的界面特性。我们将特别关注颗粒形状对复合材料性能的影响。运用纳米压痕实验来获取复合材料的机械性能,并用有限元数值模拟对实验结果进行验证。在构建颗粒/基体界面压痕模型的过程中,涉及到不同复合界面的几何学以及不同铝基体材料的模拟。在实验和模拟部分,分别对4种具有不同屈服强度的基体进行测试:纯Al,Al6061,Al2A14和Al2024。针对每一种复合材料,提取铝和碳化硅界面附近的硬度和模量,结果显示复合材料的硬度和模量对颗粒形状和基体性质具有强烈依赖。最后,数值模型与纳米压痕实验结果的拟实更证明上述结果的精确性。

关键词：金属基复合材料 SiC颗粒纳米压痕界面特征有限元模拟

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

rESEArCH AND DEVELOPmeNT OF FUEL ALCOHOL SYNTHESIS FrOM SYNGAS

引用

journal of Energy Chemistry 1995年第1期 12-22页

作者： CHEN Zheng-Hua NIU Yu-Qing LI YuLIU Xiu-Lan BO Lu-Hong DU Ming-XianInstitute of Coal Chemistry, Academia Sinica Taiyuan,Shanxi. 030001ZHANG Gui-Qin LI jin-ChengTaiyuan Chemical Fertilizer plard Taiyuan,Shanxi 030021

The research and development of catalyst preparation and catalytic technology for fuel alcohol synthesis from syngas have been conducted. The laboratory research work includes the investigation on the effects of preparation method, the composition and K2O content on the catalyst performance. The influences of reaction temperature, pressure, GHSV and feed composition on higher alcohols synthesis have also been investigated. On the basis of laboratory results, the catalysts have been further tesied in micro-pilot reactor under the industrial condition to investigate the effects of commercial preparation of catalyst, the reactor scaling up and (he use of industrial coal based syngas on the fuel alcohol ( mixture of methanol and higher alcohols ) synthesis. The catalyst stability has been tested by a 1000 h continuous operation. These provide the fundamental for further commercial plant design.

关键词： higher alcohols fuel alcohol methanol. iso-butanol CO hydrogenation catalysis

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

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

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：