“Unsuitable performance of concrete joints are important factors of destruction of concrete structures due to earthquake; thus strengthening and improvement of concrete joints can be a good solution to overcome with these factors. In this research, reinforced concrete joints strengthened with FRP composites selleck chemicals llc are investigated. Also, by ABAQUS software, the effect o fusing different kinds of polymer composites sheets (FRP) with different reinforcing models on bearing capacity and displacement
of plastic hinge location at the same time. To do this, at first a concrete connection in ABAQUS software with a CFRP layer is reinforced according to lab specifications and after the comparison of the results of software with the already done lab specimen, validity and precision of the software performance was considered. Then, 58 specimens of reinforced concrete joints were modeled in two states of reinforced and non-reinforced by FRP sheets with different reinforcement models, in addition by considering the effects of length, along fibers, binding and the material of fiber (CFRP-GFRP) were considered and their final bearing
capacity was determined. The results reveal that using FRP for shear strengthening and increasing bearing capacity can be a good choice to reinforce and treat the structures. Also, the results show the maximum bearing increasing of reinforced connection according to reinforcement model in all the connection as entirely. [Mohammad Zeynali Moghaddam. Seismic Rehabilitation of Strengthened Reinforced Concrete Exterior Beam-Column Joints Using FRP Composites. Life Sci J 2012;9(4):5417-5427] NF-��B inhibitor (ISSN:1097-8135). http://www.lifesciencesite.com. 802″
“Skim rubber was recovered from skim natural rubber latex by using cellulose ethers i.e., hydroxypropyl cellulose (HPC), methyl cellulose (MC) and hydroxypropylmethyl
JNK-IN-8 clinical trial cellulose (HPMC). The thernno-responsive characteristics of cellulose ethers were considered for recycling purpose. It was found that cloud point and recovery temperatures were noticeably decreased when the cellulose ethers were dissolved in serum phase. HPC precipitated from the solution on heating in the form of an off-white powder whereas MC formed a firmer gel than HPMC which suggesting that hydroxypropyl substituents in the cellulose ether molecules influenced the gelation process. The water and nitrogen contents in the gel of recovered cellulose ethers were in the following order: MC > HPMC > HPC. Reuse of HPC in the creaming procedure for 5 cycles could provide consistency in both rubber concentration in the cream phase and recovered rubber content. It had a possibility for applying HPC as creaming agent in the rubber industry.”
“This is the first comprehensive study of a collection of Ralstonia solanacearum strains from the southeastern United States to be characterized based on biovar, pathogenicity, hypersensitive reaction on tobacco, and phylogenetic analyses of the egl sequence.