Lishui University

About: Lishui University is a education organization based out in Lishui, China. It is known for research contribution in the topics: Soliton & Nonlinear system. The organization has 1282 authors who have published 1218 publications receiving 12056 citations. The organization is also known as: LSU.

Recycling and reuse of waste concrete in China: Part I. Material behaviour of recycled aggregate concrete

Abstract: From the viewpoint of environmental preservation and effective utilization of resources, it is beneficial and necessary to reuse waste concrete as recycled concrete aggregate (RCA) for new concrete, often referred to as recycled aggregate concrete (RAC). In the recent years, intensive researches on this topic have been carried out in China and several successful applications of RAC in practical engineering were also performed. This paper provides an introduction of the background information for the recycling of waste concrete in China and a critical review of the related studies and achievements on the material behaviour of RAC. The following aspects are mainly focused on: the production of RCA, the mechanical behaviour of RAC (both strength and deformation characteristics) and the durability aspects of RAC. Furthermore, a brief introduction to the provisions for RCA and material behaviour of RAC specified in the first standard for RAC in China—Technical Code for Application of Recycled Aggregate Concrete (DG/TJ07-008), issued in 2007, was also presented.

Recent Advances in the Synthesis of Aryl Nitrile Compounds

Abstract: Aryl nitriles are found wide applications in natural products, pharmaceuticals, agrochemicals, dyes, and herbicides. Moreover, because the cyano group can be easily converted into various functional groups, aryl nitriles are important intermediates in synthetic organic chemistry. Consequently, the development of new methodologies for the synthesis of aryl nitriles is of significant interests. The traditional methods for their synthesis include Sandmeyer reactions, Rosenmund-von Braun reactions, dehydration reactions of aldoximes and amides. In recent years, numerous efforts have been devoted to the transition-metal-catalyzed cyanation reactions of aryl (pseudo)halides, organometallic reagents and aryl C-H bonds. A number of cyanating reagents have been explored for such transformations, including metal cyanides and organic cyano group sources. In addition, styrene and aryl-substituted alkynes are successfully converted into aryl nitriles through the C-C double or triple bond cleavage. Various benzylic compounds have also been reported for the synthesis of aryl nitriles, such as benzylic halides, alcohols, amines and azides. Furthermore, direct conversion of the methyl group of toluene derivatives into cyano group has also drawn attentions. In this critical review, we summarize the recent developments and useful applications in this field and their mechanisms are also briefly discussed.