检索结果-南通市图书馆

Genetic variation of Norway spruce clones regarding their natural durability, physical and chemical properties

Advances in Bioscience and Biotechnology 2012年第8期3卷 1104-1112页

作者： Ilze Irbe Guna Noldt Uldis Grinfelds Anrijs Verovkins Aris Jansons gerald koch Johann Heinrich von Thunen-Institute (vTI)/Federal Research Institute for Rural Areas Forestry and Fisheries Institute of Wood Technology and Wood Biology (HTB) Hamburg Germany Latvian State Forest Research Institute “Silava” Salaspils Latvia Latvian State Institute of Wood Chemistry (LS IWC) Riga Latvia

Genetic variation of ten Norway spruce (Picea abies (L.) Karst.) clones regarding their decay resistance against brown rot fungi, as well as physical and chemical properties of clones were investigated. 31- year-old spruce clones: 26, 31, A10, A15, A7, B10, B15, B6, V7, V9 were selected across Latvia. The stem diameters of spruce clones varied between 13.0 and 20.9 cm. The wood density of clones ranged from 361 to 443 kg/m3. Klason lignin content, depending on the clone, was between 27.0%-28.9%. Cellular UV microspectrophotometry of the non-infected tracheids displayed the typical lignin distribution with highest absorbance values in the cell corners (abs280 nm 0.80) and compound middle lamellae (abs280 nm 0.48), while secondary wall showed lower lignin absorbance values (abs280 nm0.29 - 0.35). The deposition of phenolic extractives in ray parenchyma and epithelial cells of resin canals were emphasized by a significantly higher UV-absorbance (abs280 nm 0.68 to 0.78) when compared to the cell wall associated lignin. The content of acetone-soluble extractives of spruce clones varied between 1.1% - 1.8%. The x-value (natural durability) for all spruce clones after exposure to C. puteana and P. placentawas >0.90 (durability class 5, not durable). Most of clones after degradation by G. trabeum had x-value > 0.90 with exception of clones B15 and V9 that showed x-value ≤ 0.90 (durability class 4, slightly durable). Natural durability of spruce clones did not correlate with stem diameter, density, content of lignin and extractives.

关键词： Norway Spruce Clones Natural Durability Brown Rot Lignin Extractives Density UV Microspectrophotometry

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

Genetic variation of Norway spruce clones regarding their natural durability, physical and chemical properties

引用

Advances in Bioscience and Biotechnology（生命科学与技术进展） 2012年第8期

作者： Ilze Irbe Guna Noldt Uldis Grinfelds Anrijs Verovkins Aris Jansons gerald koch

来源：评论

学校读者我要写书评

暂无评论

TACKLING INDUSTRIAL-SCALE SUPPLY CHAIN PROBLEMS BY MIXED-INTEGER PROGRAMMING

引用

Journal of Computational Mathematics 2019年第6期37卷 866-888页

作者： gerald Gamrath Ambros Gleixner Thorsten koch Matt hias Miltenberger Dimitri Kniasew Dominik Schlogel Alexander Martin Dieter Weninger Zuse Institute Berlin Department Optimization SAP SE SAP Optimization Friedrich-Alexander-Universitat Erlangen-NiimbeTg Department Mathematics

The modeling flexibility and the optimality guarantees provided by mixed-integer programming greatly aid the design of robust and future-proof decision support *** complexity of industrial-scale supply chain optimization,however,often poses limits to the application of general mixed-integer programming *** this paper we describe algorithmic innovations that help to ensure that MIP solver performance matches the complexity of the large supply chain problems and tight time limits encountered in *** computational evaluation is based on a diverse set,modeling real-world scenarios supplied by our industry partner SAP.

关键词： Supply chain management Supply network optimization Mixed-integer linear programming Primal heuristics Numerical stability Large-scale optimization

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

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

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：