Search results

Clinically confirmed evidence [3] indicates that moist wounds are able to reduce infection and can absorb water within the crosslinked network structure, while being able to swell or contract.
These are difficult to control within the structure, and when put into practice, may reduce the efficiency of the release of the active substance.
It also indicates the functional groups that appeared matched the crosslinked chitosan/polyvinyl alcohol gel structure with glutaraldehyde, as shown in Fig. 4b, below [19].
Due to the connection of the polymer line structure, there is a gap.
Wei, Radiation synthesis and characterization of nanosilver/gelatin/carboxymethyl chitosan hydrogel, Radiation Physics and Chemistry. 81 (2012) 553-560

This makes microwave chemistry an ideal tool for rapid reaction scouting and optimization of conditions, allowing very rapid progress through hypotheses-experiment-results iterations.
The morphology and crystal structure of the particles are characterized in situ by particle mass spectrometry (PMS) and ex situ by means of X-ray diffraction, high resolution transmission electron microscopy, electron energy loss spectroscopy, and infrared spectroscopy.
Theoretical calculations and molecular dynamics simulations were performed to analyze the resulting structure[9].
Studies present the synthetic techniques utilized as well as the X-ray structures and characteristic properties of each of these compounds.

We supposed that this chemical structure can form a strong interaction with the urethane group.
Introduction The properties of polyurethane elastomers have been known since the beginning of industrial research on isocyanate chemistry.
Because of the planar structure of pyrrolidones the oxygen with its high electronegativity can easily send an electron to delocalize, and it produces a strong dipole moment (Figure 1).
For better understanding of the mechanism of interaction of Flexidone plasticizers and the structure changes we plan further investigations, namely thermally stimulated discharge and Raman imaging.

Synthesis and Structure Nikolai Shapkin1,a*, Alevtina Kapustina2,b, Natalya Dombai3,c, Vitalii Libanov4,d, Irina Khal’chenko5,e, Sergei Gardionov6,f, Victoria Gribova7,g 1,2,3,4,5,6,7Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia aemail: npshapkin@gmail.com, bemail: kapustina.aa@dvfu.ru, cemail: lisitskaya@mail.ru, demail: libanov.vv@dvfu.ru, eemail: khalchenko.ig@dvfu.ru, femail: gardionov.sv@dvfu.ru, gemail: vasileva.vv@dvfu.ru Keywords: Polymolybdenum(VI) phenylsiloxanes, mechanochemical activation, Miller–Boyer method, the Debye-Shearer equation, cross-section.
The crystal chemistry parameters of the fraction obtained in solution with the ratio Si/Mo = 1:2 have been calculated on the basis of the X-ray diffraction analysis data using the Debye–Shearer equation.
The formula unit mass calculated by this method (1150 g) is close to that of the elementary unit (1166 g) calculated from its doubled general formula ({[(PhSiO1.5)][MoO2(acac)]2}2) reflecting the structure of the chain shown in Fig. 2.
Diffractograms of fractions of the polymer II: a) soluble, b) insoluble Thus, one can assume that these fractions were the products of polycondensation of PPS and molybdenyl(VI) acetylacetonate, just like the fraction III of the synthesis 1 and, therefore, had the same structure.
Unlike the reaction carried out in xylene, at mechanochemical activation, no products with the ratio Si/Mo = 0.5 and the structure shown in Fig. 2 are formed.

Tribological Behaviors of Polymer Based Composites under Alkaline Conditions ZHU Yanji1,a, QIAN Huijuan2,b, WANG Guiying1,c, WANG Huaiyuan1,*,d 1College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China 2College of Chemistry and Chemical Engineering, Daqing Normal University, Daqing, 163712, China aemail: jsipt@163.com, bemail: qianhuijuan1981@163.com, cemail: gywang1984@hotmail.com, dcorresponding author, email: wanghyjiji@163.com Keywords: Polymer composites; PTW; Carbon fibers; Wear; Alkaline solution Abstract.
Because of the stable tunnel crystal structure and frame structure micro-reinforcement capacity, PTWs show outstanding performances in increasing the wear resistance and reducing the friction coefficients of both PEEK and PTFE based composites under alkaline.
Because of the stable tunnel crystal structure and frame structure micro-reinforcement capacity, PTW decreased the direct contact between counter-face and matrix, so the composites with PTWs lead to the lower wear rate.
Because of the stable tunnel crystal structure and frame structure micro-reinforcement capacity, PTW shows outstanding performances in decreasing the friction coefficient and increasing the wear resistance of PTFE/PEEK composites and PTFE based composites under alkaline condition. 2.

Results and Discussion Morphological structure - Scanning electron microscopy.
Morphological structure of treated fabrics with ZnO and Ag-doped ZnO NPs is demonstrated in Fig. 2.
The antibacterial pad features a 2-layer structure.
Mohanta, Bacterial synthesized metal and metal salt nanoparticles in biomedical applications: an up and coming approach, Applied Organometallic Chemistry 34(9) (2020) e5810
Etemadifar, Fabricating multifunctional silver nanoparticles-coated cotton fabric, Arabian Journal of Chemistry 10 (2017) S2355-S2362

Both samples have same Ca/P ratio but have different crystal structure.
Table 1 Crystal structure, cell parameters and loading and release percentage of Ibuprofen from CaP nanocarriers.
However, β-TCP exhibits higher loading efficiency indicating the role of crystal structure in the loading profile.
Thus release profile seems to be strongly related to crystal structure and Ca/P ratio of CaP nanocarriers.
V.Uskokovic and D.P.Uskokovic, Nanosized hydroxyapatite and other calcium phosphates: Chemistry of formation and application as drug and gene delivery agents, J.

Rotomskis Vilnius University Laser Research Center, Saul� tekio av. 9, LT-2040 Vilnius, Lithuania ricardas.rotomskis@ff.vu.lt 1 Institute of Chemistry, A.
They showed that substituted porphyrin molecules adsorbed on a gold surface form monomers, trimers, tetramers or extended wirelike structures.
Stripe like structures were not observed in this image.
The stripe like self-assembling structures were detected.
Network like structure of TPPS4 J-aggregates, caused by coupling of stripes side-by-side, is not characteristic of TPPS3 aggregates.

The structure of obtained alloys is strongly non-uniform and abounds with dendritic forms.
Photographs of interlayer microsections, as obtained by contact melting in the Sn–(Bi+0.5 at.% In) system Comparison of results from measuring the length and studying the structure of contact interlayers in case of introducing both regular In admixture to Sn ((Sn+0.5 at.% In)-Bi system) and alkali-earth admixtures ((Sn+0.3 at.% Sr)-Bi and (Sn+0.3 at.% Ba)-Bi systems) show that they have different effects.
There are also differences in the structure of the contact interlayers It should be noted that the current density and temperature were the same in both experiments: j=0.5 A/mm2, t=142ºC.
References [1] Akhkubekov A.A., Baisultanuv M.M., Asupaev A.A., Studying joint influence of small admixtures and electrotransport onto formation and structure of eutectic alloys in contact melting, Collected in Regularities in Structural Formation of Eutectic Alloys, Dnepropetrovsk, 1986, 224-226
Kh., Solid state chemistry and modern micro- and nanotechnologies. 5th International conference.

A Study of the Structure and Regularities of Formation of the Compounds during Explosive Welding of Steel-Aluminum Composite V.I.
This paper discusses the structure and regularities of formation of compounds during explosive welding plate steel-aluminum composite.
The aim of this work was to study the structure and regularities of formation of the compounds during explosive welding of steel-aluminum composite.
Stepanishev, Structure and Properties of Explosion-Welded Joints of Carbon Steels, Metal Science and Heat Treatment. 44 (2002) 524-528
Chugunov, Special features of plastic deformation of the metal of the weld zone in explosive welding aluminium to copper, Physics and Chemistry of Materials Treatment. 37 (2003) 73-78