Solid composites

The composite electrolyte also showed one and half order magnitude higher ion conductivity than pure SDC electrolyte at measuring temperature ranges. Bismuth samarium oxide formed by reaction between Bi2O3 and SDC during sintering seems to enhance to electrical performance because it is known that it has superior ionic conductivity to SDC.

7p vikissinger 03-03-2022 1 0   Download

Free faecal liquid (FFL) is a condition in horses characterised by two-phase (one solid and one liquid) separation of faeces. Causes of the condition are unknown, but disturbed hindgut fermentation has been suggested as it may alter biochemical composition and appearance of faeces in equines.

9p vidarwin 22-02-2022 3 0   Download

The speciation and preconcentration of selenium were carried out by solid phase extraction using nanozirconium oxide/boron oxide (ZrO2/B2O3). Electrothermal atomic absorption spectrometry (ETAAS) was used for detection. This preconcentration and/or speciation method depends on the retention of Se(IV) ions selectively as its ammonium pyrrolidine dithiocarbamate (APDC) complex on the sorbent. The effects of pH, flow rate, and volume of sample solution and eluent type were investigated for determining the optimum preconcentration and speciation conditions.

12p langthannam 29-12-2021 2 0   Download

A novel preconcentration method for Pb and Zn ions using a column packed with Schiff base modified silica gel is described. The method was based on the sorption of analytes on N,N’-bis(4-methoxysalicylidene)-1,3-propanediamine modified silica gel and elution with HNO3 prior to flame atomic absorption analysis. The parameters pH, flow rate, sample volume, eluent volume, and concentration were optimized using a central composite design.

12p langthannam 29-12-2021 0 0   Download

Silver(I)-selective sensors were prepared from a solid-state contact polyvinyl chloride (PVC) membrane. (Z)-2-(2-((3-(2-hydroxyphenyl)-5-(p-tolyl)-1H -pyrrol-2-yl)imino)-5-(p-tolyl)-2H -pyrrol-3-yl)phenol was synthesized as an ionophore molecule and embedded in the silver(I)-selective PVC membrane composition. The sensor was also successfully applied in the analysis of real water samples. In real water samples prepared by standard addition method, recoveries in the range of 82.30%–95.15% were obtained.

10p tudichquannguyet 29-11-2021 2 2   Download

Artificially fabricated hydroxyapatite (HAP) shows excellent biocompatibility with various kinds of cells and tissues which makes it an ideal candidate for a bone substitute material. In this study, hydroxyapatite nanoparticles have been prepared by using the wet chemical precipitation method using calcium nitrate tetra-hydrate [Ca(NO3)2.4H2O] and di-ammonium hydrogen phosphate [(NH4)2HPO4] as precursors. The composite scaffolds have been prepared by a freeze-drying method with hydroxyapatite, chitosan, and gelatin which form a 3D network of interconnected pores.

17p tudichquannguyet 29-11-2021 1 0   Download

The existence of cation-vacancy sites in fullerides might lead to long-range ordering and generate a new vacancy-ordered superstructure. The purpose of this work is to search whether or not long-range ordering of vacant tetrahedral sites, namely superstructure emerges in nonstoichiometric K1.5Ba0.25CsC60 fulleride. Therefore, K1.5Ba0.25CsC60 with cation-vacancy sites is synthesized using a precursor method to avoid inadequate stoichiometry control and formation of impurity phases within the target composition.

8p tudichquannguyet 29-11-2021 0 0   Download

Reusability of two heterogeneous catalysts in ultrasound (US) assisted biodiesel production was investigated in comparison to each other. An ultrasound (US) generator (200 W, 20 kHz) equipped with a horn type probe (19 mm) was used. Regeneration experiments were planned according to second order central composite design (CCD) method. After the eighth use of the catalysts, biodiesel yield decreased from 99.1% to 90.4% for calcined calcite (CaO) and from 98.8% to 89.8% for calcined dolomite (CaO.MgO).

6p tudichquannguyet 29-11-2021 1 0   Download

Fe2O3 -V2O5 mixed oxides were synthesized with solid-state dispersion (SSD) and coprecipitation methods. In addition, transition metal oxides such as CuO, NiO, and Co3O4 were successfully loaded on the synthesized catalyst (Fe2O3 -V2O5) using the SSD method. The composite catalysts were inspected for their photocatalytic activities in degrading 2,4-dichlorophenol under UV light enforcement.

14p tudichquannguyet 29-11-2021 1 0   Download

The mixed ligand coordination compounds containing acesulfamato and N,N-diethylnicotinamide biomolecules of some rare earth metal cations (Eu3+, Tb3+, Ho3+, Er3+ and Yb3+) were synthesized, and their structural properties were investigated. Possible structural formulas have been proposed by determining the chemical composition of molecules (elemental analysis), binding properties (infrared spectroscopy, mass analysis, solid-state UV-vis spectroscopy), thermal degradation properties (TGA / DTA curves).

12p tudichquannguyet 29-11-2021 2 0   Download

The research objectives of the thesis: Mn-(Bi, Ga) based rare-earth-free hard magnetic materials. Soft magnetic materials of Fe-Co. Rare-earth-free hard magnetic nano composite materials of Mn-(Bi, Ga)/Fe-Co.

27p thebadguys 08-06-2021 3 1   Download

Immune checkpoint blockades (ICBs) are characterized by a durable clinical response and better tolerability in patients with a variety of advanced solid tumors. However, we not infrequently encounter patients with hyperprogressive disease (HPD) exhibiting paradoxically accelerated tumor growth with poor clinical outcomes.

11p vianrose2711 27-04-2021 2 0   Download

This paper reports the application of consecutive-interpolation procedure into four-node quadrilateral elements for analysis of two-dimensional cracked solids made of functionally graded composite plate. Compared to standard finite element method, the recent developed consecutiveinterpolation has been shown to possess many desirable features, such as higher accuracy and smooth nodal gradients it still satisfies the Kronecker-delta property and keeps the total number of degrees of freedom unchanged.

11p nguaconbaynhay11 07-04-2021 11 0   Download

Building approximation formulas using equivalentinclusion method to determine the effective values of the conductivity, the elastic modulus of compound-inclusion composite materials and applying numerical methods using finite elements (FE) calculated for some specific material models.

27p capheviahe26 25-01-2021 2 1   Download

There were more than 200 reports with five specialized subcommittees: (A) Physics and magnetic materials, (B) Semiconductor and dielectric physics, (C) Materials - semiconductor components - dielectric, (D) Biomedical materials - agriculture, energy - environment, (E) Composite materials - metals - ceramics. Besides, numerous reports submitted to the Journal of Science and Technology (Vietnam Academy of Science and Technology), full-text reports sent to the Organizing Committee, after a critical review process, had been summarized and published in the Collection of conference reports.

9p larachdumlanat127 02-01-2021 5 0   Download

The present investigation was undertaken to explore the potentials of foxtail millet for development of RTC foxtail millet flakes and evaluate the physicochemical properties.

6p gaocaolon9 22-12-2020 1 0   Download

A study was conducted to investigate the chemical and mineral composition of cultivars belonging to four different genomic groups. Results revealed that B genome rich cultivar, Karpuravalli (ABB), had higher dry matter and starch, less moisture, total soluble solids, titratable acidity, total and reducing sugars, when compared with A genome rich cultivar, Robusta (AAA) and Poovan (AAB). Similarly cultivars with B genome had higher nitrogen, lesser calcium, potassium, zinc and iron, while mixed influence was noticed with regard to minerals like phosphorus and magnesium.

6p caygaocaolon8 07-11-2020 7 1   Download

A Scanning Electron Microscope (SEM) is a powerful magnification tool that utilizes focused beams of electrons to obtain information. The high-resolution, threedimensional images produced by SEMs provide topographical, morphological and compositional information makes them invaluable in a variety of science and industry applications. A Scanning Electron Microscope provides detailed surface data of solid samples.

6p cothumenhmong7 09-09-2020 5 0   Download

The Urban Environment is important for all of us, not least because so many of us live in cities. Cleaner city, healthy life and a better environment are important demands for city dwellers. Due to increase in urbanization rate, population density and per capita production of solid waste is also increasing. According to MSW Rules, 2000, every municipal authority is responsible for setting up a waste processing and disposal facility. Approximately 50 million metric tonnes (115,000 metric tonnes per day) of solid waste is generated every year by the urban population in India.

11p angicungduoc6 20-07-2020 8 1   Download

An experiment was conducted to investigate the effect of vitamin E and Chromium propionate during transition period in Sahiwal cows to assess the possibilities of improvement in production performance of supplementation of vitamin E and Chromium propionate. A total of 28 cows were selected on the basis of their milk yield, parity and body weight are grouped into four homogenous treatment groups of 7 each. No significant effect of supplementation was seen on milk composition.

6p quenchua6 15-06-2020 6 2   Download