Search results

EVALUATION OF S/S PROCESS OF TANNERY WASTE IN CEMENT BY STRUCTURAL AND MECHANICAL ANALYSIS Pinto, C.A1; Dweck,J.1; Sansalone, J.J.2; Cartledge, F.K.3; Hamassaki, L.T.4; Diaz, F.R.V.5; Albanez, N.5; Büchler, P.M.6 1 Inorganic Process Department, School of Chemistry, Federal University of Rio de Janeiro, Brazil; email: carolina.pinto@gmail.com 2 Department of Civil and Environmental Engineering, Louisiana State University, USA 3 Chemistry Department, Louisiana State University, USA 4 Technology Research Institute of São Paulo State, Civil Engineering Department, Brazil 5 Metallurgical and Materials Engineering Department, University of São Paulo, Brazil 6 Chemical Engineering Department, University of São Paulo, Brazil Keywords: cement; tannery waste; clay; stabilization/solidification; NMR; compressive strength.
Solid-state 29Si nuclear magnetic resonance has been shown to be an important mechanism in the chemistry study of solidified hazardous wastes [15,16,17,18].
The structure and formation mechanism of C-S-H from tricalcium silicate can be analyzed by 29Si NMR During the induction time some polymerized silica appear, which starts with Q0 chemical shifts and this polymerization is increased during the cement hydration process [18,19].
Dale Treleaven at Chemistry Department, Louisiana State University, USA for the use of the 29Si NMR spectrometer, Samuel Boggan from Southern University and Willian G.

Lu Qiu1, 2 a*, Haihan Yang1b, Liji Wang1c, Shuguo Fan1,2d, Jianhui Gao3e 1Department of Chemistry and Life Science, Chuxiong Normal University, Chuxiong675000, PR China 2Key Subject Construction of Yunnan Province and Chuxiong Normal University, Chuxiong 675000, PR China 3library，Chuxiong Normal University, Chuxiong675000, PR China aemail:qiulu@cxtc.edu.cn,bemail:haiyanyang@cxtc.edu.cn,cemail:wangliji@cxtc.edu.cn, demail:fansg@cxtc.edu.cn, eemail: gao1026@cxtc.edu.cn Keywords: silver nanoparticles; bacteriostatic effect; Exserohilum turcicum Pass.; carbendazim; chlorothalonil Abstract.
When the permeability of the cell membrane is damaged, on the one hand, the inside-cell matter will exosmose massively, resulting in increased conductivity [27]; on the other hand, a large number of silver ions will enter into the cell and combine with the –SH on the intracellular enzymes and proteins, which will destroy the cell structure, lead to the disintegration of the cells, and achieve bacteriostatic effect [28].
Zboril, The Journal of Physical Chemistry B,  110(33) (2006)16248-16253
Jana,  The Journal of Physical Chemistry A,B,C. 112(15) (2008)
Lopez-Quintela, JOURNAL OF PHYSICAL CHEMISTRY B, 10(41) (2000) 9683-9688

Synthesis, spectra and bond studies on a novel Cu-Ru complex of magnetic dilution Wen-Zhen Wang*1,a, Yan Li 1,b and Dai-Zheng Liao2,c 1School of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, P.
China 2Department of Chemistry, Nankai University, Tianjin, 300071, P.
The crystal structure showed that the complex consisted of dication [Ru(phen)3]2+ and complex dianion [Cu(opba)]2–.
Scheme I [Cu(opba)]2– Results and discussion Structure description Figure 1 shows the structure of complex [Ru(phen)3][Cu(opba)]‧6H2O.
The structure was solved by using the SHELXL–97 and refined with SHELXL–97 by full-matrix least squares on F2 values.

Numerical Simulation on Dynamic Laval Nozzle Under Different Detonation Model Jun Ting Yin1, a, Gang Li1, b* 1 Xi’an Modern Chemistry Research Institute, Xi’an, 710065, China a1371965619@qq.com, bnpzk140@163.com Key words: detonation; shell; laval nozzle; dynamic; numerical simulation Abstract: In conventional charge structure, the shell of charge’s containment is normally closed, with no explosive.
The existing charge structure design of shell don’t have the guiding function of detonation product, as well as can’t implement complex shell structure design, because this design usually unable to meet higher explosive-hell’s(including Penetrators) demand of charge-weight ratio .Therefore, this thesis present a multi-layer(including thin-layer) explosive shell structure design, by initiating thin-layer explosive to control the deformation of shell’s inner-layer, this can realize the similar structure with the Laval structure[1~2], to get detonation product orientation ability of the shell structure.
Structure Design multi-layer shell structure which including thin-layer are showing on figure 1.
Figure.1 The structure of multi-layer shell containing thin-layer explosive.
Conclusion This thesis presents sandwich-structure design which including thin-layer explosive, the numerical simulation results show that, dynamic laval nozzle Structure can be made by different ways of initiating thin-layer explosive.

New Polymer Assembles with Potential Use as Solid Electrolytes Type Membranes Ioana MAIOR1,a, Ana-Maria ALBU1,b* and Raluca GABOR2,c 1 Politehnica University of Bucharest, a Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, b Department of Bioresources and Polymer Science, 1–7 Polizu Str., 011061–Bucharest, Romania 2 The National Institute for Research & Development in Chemistry and Petrochemistry, 202 Spl.
We intend to develop the technical strategies targeted firstly to enhance the conductivity under partially dry conditions by controlling the polymer morphology, improving the electrode structure with our hydrocarbon-based electrodes, and consideration of other organic moieties for proton conduction as well as organic-inorganic composite PEM materials.
A secondary future research direction regards the formulation of an optimization of the ionic transport in membrane, based on the elementary acts of ionization, composition, structure and density of the active groups [29, 30]. 2.
The low uniformity of PAA membrane can be due to the monomer unity structure, less voluminous, that may set the premise for a cluttered type deposition.

Silver powders were effectively infiltrated and spread on the substrate, and the silver particles tended to grow along the horizontal direction, so the silver film had a compact structure and a good electric conductivity after sintering.
When the content of spherical silver powders and flake silver powders had an appropriate proportion, the structure of the conductive network was closer, so the silver film achieved the optimum conductivity.
The structure of the silver film was compact, and the voidage was small.
Materials Chemistry and Physics 2003, 82 : 237–245
Materials Chemistry and Physics 2006, 96 : 145-153

The initial increase can be attributed to the structure of cellulose and its compatibility with the PEG matrix.
The authors would also like to thank the Analytical Services Laboratory of the Institute of Chemistry, University of the Philippines Diliman, and the Institute for Frontier Materials of Deakin University for instrumental support.
Dong, “Changes in physicomechanical properties and structures of jute fibers after tetraacetylethylenediamine activated hydrogen peroxide treatment,” J.
Gu, “Effect of Hydrogen Bonds on Structures and Glass Transition Temperatures of Maleimide–Isobutene Alternating Copolymers: Molecular Dynamics Simulation Study,” Macromol.
Available: https://www.frontiersin.org/journals/chemistry/ articles/10.3389/fchem.2020.00392.

This scientific field investigates the relationship between the structure of materials at atomic or molecular scales and their macroscopicproperties.
It incorporates elements of applied physics and chemistry.
This article is motivated from the observation that standard methods in sa-mpling theory provide ex -amples of multirsolution structure which are not FMRAs.
Inspired by [5] and [7], we introduce the notion of a generalized multiresolution structure (GMRS) of generated by several functions of inte ger translates in space.
We say that a Generalized multiresolution structure (GMS) of is a sequence of closed linear subspaces of space and 2u elements such that (i) ; (ii) ; is dense in; (iii) if and only if implies , for; (v) forms an affine pseudoframe for with respect to.

Epoxy-Polyelectrolite Composites as a Basis of Intellectual Coating for Protection from Underfilm Corrosion on Cathodically Polarizable Structures Nikolay N.
Bukov2,b 1Company “Modern technologies”, 350040, Stavropolskaya 149, Krasnodar, Russia 2Kuban State University, Department Chemistry and High Technologies, 350040, Stavropolskaya 149, Krasnodar, Russia a*nikpetro@yandex.ru, bbukov@mail.ru Keywords: underfilm corrosion; epoxy-polyelectrolite composite; intellectual coating; cathodic protection.
Method that allows to increase the effectiveness of cathodic protection is application to the surface of the metal structure, low resistance under operating conditions, coatings [3].
In theory and practice of electrochemical processes are well known polyelectrolytes - polymers in which the molecular structure includes ionic groups capable of ionization in solution.
Sorption of water or an electrolyte solution, from the viewpoint of degradation of a metal being corrosion-active medium, forms their specific a working structure.

In Fig. 4(a), only a porous structure of PAM was observed.
However, as depicted in Fig. 4(b-c), with the incorporation of alginate, the porous structure tended to diminish.
An expansion of porous structure is evident after the hydrogel was soaked in ZnSO4 electrolyte, as shown in Fig. 4(d).
[2] Xu, C., et al., Energetic zinc ion chemistry: the rechargeable zinc ion battery.
Journal of Energy Chemistry, 2019. 37: p. 126-142