Papers by Author: Xu Xu Zheng

Abstract: In order to obtain better conductive functional fillers and conductive adhesives, the surface of carbon nanotubes(CNTs) is wrapped by silver using chemical plating. Ag/C composite nanotubes that have excellent conductivity are achieved and the conductive adhesives were prepared by using the composite nanotubes as conductive functional fillers. Experiments indicated that the achieved conductive nano-adhesives have better conductivity and better physical and chemical performance. That would save 30-50% consumption of silver than conventional silver conductive adhesives.

Abstract: ADDIE instructional design is a systematic approach for course development and instructional activities. It consists of analyzing the current state and needs of the learner, defining the end goal and expected outcomes of instruction, determining the instructional methods and approach, selecting the instructional means, synthesizing instructional plan, organizing and implementing instructional activities, and monitoring and evaluating instructional effectiveness. It gives a detailed illustration of the process of effectively designing and creating instructional activities for higher education classrooms and provides higher education lecturers with a well-defined structured procedures for instructional design.

Abstract: Sweet potato (Ipomoea batatas) was a wildely planted root crop in most area of China and considered as a good feedstock for fuel ethanol production. Very high gravity ethanol fermentation technology exhibited promising industrial application for advantages including productivity improvement, polluted water output reduction and energy consumption saving. In this study very high gravity liquefied sweet potato mash containing 260 g/kg glucose (after fully saccharified) was used for fuel ethanol fermentation. 0.8 g/kg (dry matter weight) was proved as the optimum glucoamylase adding dosage in simultaneous saccharification and fermentation. Datas analysis indicated that the osmotic pressure was controlled strictly exhibited by high growth rate of yeast and high rate of ethanol formation comparing with other dosages, and 119.78 g/kg (15.07 %, v/v) ethanol equivalent to 90.16 % of theoretical yield was achieved in 64 hours.

Abstract: In this work, the effect of split ratio and the column flow in determination of OCPs in Traditional Chinese medicines are discussed in the name of heptachlor. When the split ratio is 60:1, the measured concentration is close to the actual concentration; on the contrary, they lead the measured concentration lower than the actual concentration. The column flow has not obviously effect on result. The split ratio is considered in OCPs analysis.

Abstract: Fuel ethanol converted from biomass is a reliable substitute for fossil fuels, and lays people’s hope on the sustainable development in the fields of energy and climate. The limitation in source of raw materials and production cost are bottlenecks which restrain the wide use of fuel ethanol. This article makes an overview of the current research progress in the new technologies from the directions in the exploiting of raw materials and energy saving and polluted water emission reduction in the production process of fuel ethanol, and analyzes the potential application prospects and advantages of various new technologies.