A Generalized Crystallographic Description of All Tellurium Nanostructures

Despite tellurium being less abundant in the Earth's crust than gold, platinum, or rare‐earth elements, the number of industrial applications of tellurium has rapidly increased in recent years. However, to date, many properties of tellurium and its associated compounds remain unknown. For example, formation mechanisms of many tellurium nanostructures synthesized so far have not yet been verified, and it is unclear why tellurium can readily transform to other compounds like silver telluride by simply mixing with solutions containing silver ions. This uncertainty appears to be due to previous misunderstandings about the tellurium structure. Here, a new approach to the tellurium structure via synthesized structures is proposed. It is found that the proposed approach applies not only to these structures but to all other tellurium nanostructures. Moreover, some unique tellurium nanostructures whose formation mechanism are, until now, unconfirmed can be explained.     

Highly Regioselective and Active Rhodium/Bisphosphite Catalytic System for Isomerization–Hydroformylation of 2-Butene

Abstract  

The formation of linear aldehyde from isomerization–hydroformylation of 2-butene represents an important subject and current task in industry. Both high activity and excellent regioselectivity were achieved in the rhodium-catalyzed 2-butene isomerization–hydroformylation with 2,2′-bis(dipyrrolylphosphinooxy)-1,1′-(±)-binaphthyl (1) as ligand. Bulky phosphite with electron-withdrawing pyrrol groups dramatically improved the selectivity of linear product, and a good yield of 90.5% aldehydes was obtained with an excellent linear aldehyde regioselectivity of 95.3% under optimized condition.     

传统工艺 活化传承——100%设计上海展2012

2012年度100%设计上海展于11月8～10日在上海展览中心举行,来自13个国家和地区123家展商及其品牌加盟参展;共有10365名观众到访参观。在经济不尽人意的大环境之下,尽管其展览规模没有人们所期待的增长,但100%设计品牌展览所张扬的设计创新力量,以及对于设计文化的有效传播,将渗透于人们的生活空间,对现实生活与未来世界将产生深远影响。     

意式生活美学:当享乐成为主义——意利访学有感

2016年9月,我被公派去意大利佛罗伦萨大学进行为期半年的访学,主要学习城镇与农村规划设计学科的先进理念和研究手段,重点研究特色小镇视觉系统设计的成果及其推广模式.通过课堂学习、田野调查和文献研究,我用视觉笔记的方式初步勾描了意式生活美学的图式艺术. 9月15日,我独自在戴高乐机场度过了一个漫长而又警惕的夜晚,和工作人员反复确认后,搭上了16日凌晨6:30的航班飞往佛罗伦萨.当我疲惫不堪地走出机场的那一刻,仿若步入了一个长达187天的梦境:所到之处矗立着罗曼式、哥特式、巴洛克和文艺复兴风格的建筑,满眼漂浮的都是中世纪的湿壁画和大卫的背影,游走在伊特鲁里亚小镇,耳畔萦绕着意大利男高音的“欢乐颂”……     

日本的“打油诗”——川柳

川柳是日本文学中的一种特殊形式,类似于我国的打油诗。它令人捧腹、针砭时弊、揭露事实,同时又是通俗化的、平民化的。从江户时代兴起至今川柳创作经久不衰,可以称为是最受喜爱的文学体裁之一。本文以川柳的经典《俳风柳多留》为例,分析了川柳的若干特质,揭示了川柳广受世人喜爱的原因。     

Effect of electrolyzed reduced water on chiral theanine and polyphenols in tea

Pure d/l-theanine enantiomers were synthesized separately, and SEM was used for their crystal-structure observation. The novel enantiomeric separating method by HPLC was established using the chiral selector of β-CD in the mobile phase. Green tea, white tea, oolong tea, black tea and Pu-erh tea were tested for theanine enantiomers by different degrees of fermentation. The significantly higher d-enantiomeric proportion of theanine was found in white tea than the others, which was probably due to its specific processing step of withering. The effect of electrolyzed reduced water (ERW) on enantiomeric theanine and polyphenols in tea was explored. There was no change of theanine, but rather a loss of ECG (epicatechin gallate) and an increasing amount of GA (gallic acid). ERW also reduced tea cream, which contains significant amount of polyphenols, indicating its potential application in the tea-beverage industry.     

市政道路建设管理与质量控制措施的研究

在城市规划与建设中，市政道路建设是一项重要的内容，其与城市居民的生活息息相关。本文通过分析现阶段市政道路质量中存在的问题，指出了质量控制的措施。     

Design and implementation of an integrated safety management system for compressed natural gas stations using ubiquitous sensor network

To increase awareness of safety in facilities where hazards may exist, operators, managers, and executive officers on the site should be able to monitor such facilities. However, most compressed natural gas (CNG) service stations in Korea use only local-mode monitoring, with only on-site operators to monitor the facility. To complement this local-mode monitoring, an online safety management system called Ubiquitous-gas safety management system (U-GSMS) was developed. The U-GSMS consists largely of software and hardware. The software consists of systems that can manage safety and operations, while the hardware consists of sensors installed in the gas facility and wireless communication systems using a ubiquitous sensor network (USN) technology that facilitates communication between sensors as well as between sensors and other devices. As these systems are web-based, on-site operators as well as managers and executive officers at the headquarters can more effectively and efficiently perform monitoring and safety management.     

Degradation kinetics of total phenolic compounds,capsaicinoids and antioxidant activity in red pepper during hot air and infrared drying process

Degradation kinetics of total phenolic compounds, capsaicinoids and antioxidant activity in red pepper during both hot air drying and infrared drying were investigated, as well as the correlation between antioxidant compounds and antioxidant capacity was discussed in current study. The fractional conversion kinetic and first order kinetic models were proved to describe the changes of total phenolic compounds vs. drying time and moisture content, respectively. Degradation of capsaicinoids and antioxidant capacity vs. drying time and moisture content both followed fractional conversion kinetic model. Infrared drying accelerated the degradation rate of total phenolic compounds and capsaicinoids vs. drying time as compared with hot air drying at the same temperature; however, a contrary result was found that infrared drying decreased the degradation rate of both total phenolic compounds and capsaicinoids vs. moisture content. Total phenolic compounds exhibited a stronger relationship with antioxidant capacity of red pepper analysed by multiple linear regression analysis.     

Effect of stacking sequence on the torsional stiffness of the composite drive shaft

Torsional stiffness is an important parameter judging the performance of composite drive shaft. In this paper, a new mechanical analytical solution of torsional stiffness for the composite drive shaft with balance laminate is derived based on classical lamination theory and mechanical analysis. Finite element analysis (FEA) has been used to calculate the torsional stiffness of carbon fiber-reinforced plastic (CFRP) drive shaft. A torsion test platform has also been constructed to measure the torsional stiffness of CFRP drive shaft specimens. Results of the mechanical analytical solution, FEA, and experiments show that the composite tube with the location of ±45° layers near to the outer surface is larger than the ones with the location of ±45° layers near to the inner surface. The effect of stacking sequence on torsional stiffness is larger in the thick-walled than that in the thin-walled composite drive shaft. The mechanical analytical solution can complement classical lamination theory which cannot reflect the effect of stacking sequence in calculating the torsional stiffness.