检索结果-南通市图书馆

Synthesization and crystallization mechanism of nano-scale γ-AlOOH with various morphologies

International Journal of Minerals,Metallurgy and Materials 2010年第3期17卷 376-379页

作者： Bao-hong Hao Ke-ming Fang Lan Xiang Qiang Liu School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China Department of Mechanical Engineering Beijing Institute of Petrochemical Technology Beijing 102617 China Department of Chemical Engineering T singhua University Beijing 100084 China

Nano-scale γ-AIOOH with various morphologies, such as whisker, bar, ball, and sheet, was synthesized successfully and control- lably through a facile hydrothermal method just by adjusting the pH value of the solvent. Based on the analysis of the experimental data, the growth mechanism of nano-scale γ-AlOOH in the hydrothermal process was established. It is proposed that the growth unit and the growth direction are determined by the pH value of the solution and the growth unit, respectively. One-dimensional γ-AlOOH, such as whisker and bar, is formed in lower pH ranges, while two-dimensional γ-AlOOH sueli as sheet is formed only in high pH environment following the plane expansion crystallization mechanism.

关键词： boehmite morphology control crystallization mechanism growth unit aggregate

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, Development and Suitability for Kent of Mango Rootstocks on Soil Substrates Collected under Anacardium occidentaleL., Khaya senegalensis(Desv.) A. Juss and Mangifera indicaL., in Casamance, Senegal

引用

American Journal of Plant Sciences 2021年第12期12卷 1800-1816页

作者： Omar Boun Atab Diedhiou Ousmane Ndiaye Boubacar Camara Antoine Sambou Saliou Ndiaye Cheikh Tidiane Ba Assane Seck University Ziguinchor Senegal National Higher School of Agriculture University Iba Der Thiam Thies Senegal Cheikh Anta Diop University Dakar Senegal

With an overall contribution of nearly 4 billion CFA francs to Senegal’s income, providing 23,000 employments more than 50% are women in 2021, the mango sector has shown its importance in the Senegalese economy even if the potential remains largely under-exploited. Thus, the study on the main local varieties remains an important perspective. This work carried out in the farm of the agroforestry department concerns the growth and development of four varieties (Pince, Kouloubadaseky, Sierra Leone and Diourou) on different soils (Mangifera indica, Anacardium occidentale and Khaya senegalensis). This work aims to contribute to the knowledge of the most cultivated varieties in Casamance. It is also a question of seeing the response of these varieties to grafting with the Kent variety. An experiment was conducted for one year with a split plot design consisting of 4 replicates (blocks). Each block contains 4 plots and each plot contains 3 sub-plots with 20 plants each. The parameters measured were: diameter at the collar, height, number of leaves, biomass, number of growth units and grafting success rate. The Sierra Leone variety showed the best growth results in terms of diameter at the crown (0.511 ± 0.090), leaf production (16 ± 2.52) and dry biomass (28.67 ± 16.80). The Kouloubadaseky variety had the best height record (41.90 ± 6.15) and the Diourou variety gave the best results in terms of fresh biomass (68.94 ± 30.90), number of growth units (9.350 ± 2.06) and grafting success rate (78.84% ± 29.44%). Anacardium occidentale soil substrate gave the best growth in height (39.73 ± 5.54 cm) while the substrate collected under M. indica L produced a greater number of leaves (13.14 ± 3.64) and grafting success rate (71.12% ± 37.25%). The Khaya senegalensis substrate recorded the highest values in biomass prod

关键词： Mango Substrate Biomass Grafting growth unit Kent

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

Crystal-habit and growth Mechanism of Synthetic Quartz

引用

Progress in Natural Science:Materials International 1993年第4期 374-380页

作者：仲维卓华素坤 PRC Shanghai 201800 Shanghai Institute of Ceramics Academia Sinica

1 INTRODUCTIONThe synthetic quartz is a practically valuable piezoelectric material which is widelyused in large *** the past three decades,we have finished the whole procedureincluding the research in lab.,intermedium experiments and the commercial *** the basis of the interior structure of quartz,the relationship between the morphologyand the interior structure was *** attention was paid to the relation between thehabit and defects,the relation between the surface structure and the enantiomorphic form.

关键词： growth unit trigonal trapezohedron simple form growth habit an adjustable structure model five-joined molecules conjugate spiral chains

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：