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Effect of Specific Ions in Preparing Water on Viscosity of Polyacrylamide Solution Shide Feng1,2, Dandan Yuan1, Xin Sui1, Jing Dong1, Shuqing Ma1, Hongjun Wu1 and Baohui Wang1,a 1College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China; 2College of Sciences, Heilongjiang Bayi Agricultural University, Daqing 163319, China awangbh@nepu.edu.cn Keywords: Oilfield; Polymer flooding; Polyacrylamide; Viscosity; Specific ion.
The steric structure will be changed.
The negative effects could been attributed in the steric structure change in the Ca2+ plus Mg2+ case, breaking of molecular chain caused by catalytic chain oxidation initiated by oxidizing S2-/Fe2+ to generation of free radicals (·OH).

The crystal structure of the well-aligned CMCs reveals the increase in the (002) peak in XRD spectrum for the aligned carbon microcoils, indicating the existence of the more regular structure in the aligned carbon microcoils.
The crystal structure of the well-aligned CMCs was investigated and compared with the partly-aligned CMCs and the randomly-grown carbon nanomaterials.
The crystal structures of samples having ACMCs (sample C), carbon nanofilaments (sample B), and loose CMCs (sample D) were investigated using XRD.
Based on the results of XRD data, it is confirmed that the samples formed by ACMCs have a more regular crystal structure compared with the samples formed by carbon nanofilaments or by loose CMCs.
Based on the results of XRD data, it is confirmed that the samples formed by ACMCs have a more regular crystal structure compared with the samples formed by carbon nanofilaments or by loose CMCs.

However, building sound models requires suitable parameters related with chemical structures.
Amino acid descriptors are often used to describe the structures of peptides.
Leo, Exploring QSAR: fundamentals and application in chemistry and biology.
Sneath, "Relations between chemical structure and biological activity in peptides," J.
Li-Chan, "Quantitative Structure−Activity Relationship Study of Bitter Peptides," J.

GIBCOtm (USA). 3T3 cells (mouse embryonicfibroblasts) are kindly provided by Changchun Institute of Applied Chemistry, Chinese Academy of Sciences.
As seen from Figure 2 a, collagen gel shows silk-membrane structure.
Fibers and mesh structure can be seen in FSEM photos, but this structure in collagen-gel is not clear.
Some fibers connect to each other to form membrane structure.
Meanwhile, fibers have rod like structure.

The morphologies and structures of the obtained PAA and PI nanofiber membrane were examined by SEM and FT-IR.
The morphology of PI nanofiber was carried out by SEM, the structures and thermal stability of the PAA and PI nanofiber membrane were studied.
FT-IR spectra are used to investigate the chemical structures of PAA (a) and PI nanofiber membrane at different thermal imdization temperature at 250°C (b), 280°C (c), 310°C (d) and 340°C (e).
Zhang, Structures and properties of polyimide fibers containing ether units, Journal of Materials Science 50 (2015) 4104-4114
Xu, Performance evaluation of electrospun polyimide non-woven separators for high power lithium-ion batteries, Journal of Electroanalytical Chemistry 767 (2016) 34-39.

Corrosion behavior of Zr53.5Cu26.5Ni5Al12Ag3 bulk amorphous alloy in 3.5% NaCl Solution Yun Li1，Shi-zhi Shang1，Ming Cheng2*，Liang Xu1，Shi-hong Zhang2 1Shenyang University of Chemical Technology, Institute of applied chemistry, Liaoning, Shenyang 110142, China 2Institute of Metal Research, Chinese Academy of sciences, Liaoning, Shenyang 110016, China * mcheng@imr.ac.cn Keywords：Zr53.5Cu26.5Ni5Al12Ag3 bulk amorphous alloy; Polarization curve; Corrosion behavior; EIS Abstract.
The results of EIS test indicate that Zr53.5Cu26.5Ni5Al12Ag3 bulk amorphous alloy has the excellent corrosion resistance because passive film with stable structure formed on the surface in 3.5% NaCl solution.

Study on fungi-bacteria consortium bioremediation of petroleum contaminated mangrove sediments amended with mixed biosurfactants Li Yuyinga, Li Bingb School of Chemistry and Environmental Engineering, Wuyi University, Jiangmen, China aemail: liliyuying@163.com; bemail: wyuchemlb@126.com Keywords: petroleum; bioremediation; biosurfactant; mangrove sediments Abstract.
This was because of the amphipathic nature of surfactant and surfactants are known to alter the structure and function of the cellular membrane, induce cellular lysis and alter the structure and functions of important bacterial enzymes (Goncalves et al., 2003;).

Development of Standard Part Library Based on SolidWorks Fang Zhou 1, a, Zhang Li-Na 2,b 1 School of Mechatronic Engineering, Xi’an Technological University, Xi’an, China 2 Xi’an Modern Chemistry Research Institute, Xi’an, China aphoenix20030696@qq.com, b502991275@qq.com Keywords: SolidWorks; standard part; development; parametric modeling; program-driven method Abstract.
But, in practice, the topological structure of parts is not easy to grasp so that the reconfiguration of parts is always breakdown.
This method does not have to understand the topological structure of parts that could simplify the process of development.

This aspect was proven to be reproducible in a more general matter, for a wide range of dielectric structures and technologies analysed elsewhere by authors, even under different stress parameters or related to other physical or chemical features.
That is why new studies of PD phenomena are needed in future, in order to understand more accurately the intimate pre-breakdown processes and failure of dielectric structures
Poppel, in: A theoretical approach to the P.D. phenomena in composite dielectrics, Cellulose Chemistry and Technology.

Synthesis, Characterization and Photophysical Properties of Thiophene-containing Chloro Re() Complex Jiexiu Wang1,a and Feng Zhao1,b,* 1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science &Technology Normal University, Fenglin Street Nanchang,Jiangxi 330013, China.
Compared with the π-electron density of carbocyclic benzene (unity on each ring atom), the π-electron density on each ring atom of thiophene is greater than unity since there are six electrons distributed over five atoms, forming a π-electron excessive heterocyclic structure.
From this point of view, it is of interest to synthesize novel Re (I) complexes with heterocyclic structures and to investigate their photoluminescent properties.