Materials Literature
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Nano-sized particles of functional polymers i.e. nano-ion-exchangers (NIEX), are unusual objects which simultaneously behave as the hyper-charged ions and the solid ion exchangers. Due to similar charges, they form very stable colloidal systems. This paper is devoted to theoretical and practical study of the proper- t…
Edible film is a thin layer made from polysaccharides, proteins, and lipids.These research was aimed to determine the effect of gelatin concentration on physical characteristics and molecular weight distribution of edible film produced from native chicken legskin gelatin.This research materials were used native chicke…
An enzymeless electrochemical sensor for detection of low amounts of H$_{2}$O$_{2}$ with the aid of Ag nanoparticles supported on conducting poly(vinylferrocene) (PVF) film was developed. Experimental results revealed that contribution of Ag nanoparticles led to remarkable improvement by means of reduction potential a…
Abstract The x-ray emission in atomic decays to M-shell of Hf, Ta, W, Pt and Au induced by electrons was studied. To this purpose, M x-ray spectra were acquired with a wavelength dispersive spectrometer, and processed by a parameter refinement method previously developed. A large set of atomic parameters corresponding…
Composite agarose films were prepared with EuIII containing polyoxometalates, in particular the organic‐inorganic hybrid [Eu(W5O18)2(pic)4]13– (Hpic = 3‐hydroxypicolinic acid) and a Mo blue EuIII derivative. The latter compound shows interesting EuIII based photoluminescence properties, described for a molybdenum blue…
Intrinsically disordered proteins (IDPs) are extensively involved in dynamic signaling processes which require a high association rate and a high dissociation rate for rapid binding/unbinding events and at the same time a sufficient high affinity for specific recognition. Although the coupled folding-binding processes…
To improve the estimation of external gamma irradiation from deposited radioactivity in urban environments a model of a modern office or residential building with glass facades was set up with eleven different building heights. Kerma conversion factors for the floors inside the building from contamination on different…
RESUMO O objetivo principal do trabalho foi avaliar compósitos cimentícios com adição de resíduos da indústria de beneficiamento de madeira para aplicação na construção civil como isolante térmico. A matriz de cimento Portland pozolânico CP IV-32 foi modificada substituindo-se parcialmente o cimento por Metacaulinita…
A grande quantidade de resíduos gerada na serragem de rochas ornamentais e as características destes materiais indicam possibilidades de uso no enriquecimento mineral e na correção de acidez de solos. No entanto, seus efeitos no meio ambiente são ainda desconhecidos, sendo necessário realizar estudos que garantam sua…
利用密度泛函理论研究了巴豆醛和肉桂醛分子在Pt-Ni-Pt（111）面的吸附构型以及相关电子性质.吸附构型与吸附能结果表明，巴豆醛和肉桂醛在覆盖度为1/25 ML的条件下，以C=C和C=O双键协同吸附在Pt-Ni-Pt（111）面较为稳定，且肉桂醛与Pt-Ni-Pt（111）面的吸附能远大于巴豆醛.由Mulliken电荷布局和差分电荷密度可知，在吸附过程中肉桂醛分子向Pt-Ni-Pt（111）面上转移的电荷数较巴豆醛更多，相互作用更大.由电子态密度分析结果可知，不饱和醛与Pt-Ni-Pt（111）面的吸附作用主要是由于分子的 p 轨道电子与催化剂 d 轨道电子之间的相互作用.由于苯基的存在使肉桂醛分子在Pt-Ni-Pt（111）面…
The objective of this study was to develop continuously tunable optical notch filters by combining four left- and right-handed circular cholesteric liquid crystal (CLC) cells without subsidiary optical components. By rotating each filter, the photonic band position could be continuously blue shifted over 100-nm spectr…
Abstract In this work, we investigate the mechanisms that control the electroluminescence from p-i-n heterostructures containing self-assembled In 0.5 Ga 0.5 As quantum dots embedded inside a GaAs/Al 0.3 Ga 0.7 As quantum well as a function of temperature and applied bias. Our results reveal that the carrier dynamics…
RESUMO Este trabalho tem como objetivo a preparação de mantas compostas por fibras do polímero biodegradável poli(3-hidroxibutirato) -(PHB) por meio da técnica de eletrofiação. Obtiveram-se mantas sob diferentes condições, variando-se o fluxo, a temperatura da solução, a tensão aplicada e a adição de um agente surfact…
NH$_{3}$ adsorption and desorption behavior of a commercial Cu-chabazite (CHA) NH$_{3}$ selective catalytic reduction (NH$_{3}$-SCR) catalyst was studied in the presence and absence of H$_{2}$O. NH$_{3}$ uptake values at various adsorption temperatures were obtained during various steps of the adsorption and temperatu…
In this study, novel zirconium dioxide (ZrO 2 )@poly(methyl methacrylate (PMMA)@polysiloxane nanohybrids were facilely synthesised using a one‐pot suspension polymerisation route. Various characterisations including Fourier transform‐infrared, X‐ray diffraction, thermogravimetric analysis, scanning electron microscopy…
In this study, experimental and statistical evaluation of antibacterial, mechanical, and comfort properties of woven fabrics consisting of cotton, bamboo and silver yarns were presented. For the purpose of the study; cotton-bamboo and cotton-silver blended fabrics were produced, mechanical properties (such as tensile…
RESUMO Filmes de polietileno de alta densidade (PEAD) foram tratados por plasma radiofrequência (RF) de N2/O2. Foi investigado o efeito da pressão do gás de trabalho N2/O2, do plasma, na texturização superficial do filme. O plasma gerado em baixa potência (20W) permite manter a amostra em baixa temperatura (T<40°C) du…
The linear response of alginate-phenyl boronic acid (Alg-PBA) esters shows a universal, composition-independent viscoelastic fluid-like behaviour. Reversible association of alginates governs their rheology at all compositions (viz. at all alginate concentrations and solution pH). However, their high strain behaviour i…
Abstract Colloidal catalysts for oxidation of water to dioxygen, which are stable on storage and under the reaction conditions, are synthesized based on CoIII, MnIII, FeIII and CuII hydroxides. Stabilization of the colloids with dextrated starch allows the process of hydroxide ageing to be stopped at the stage of the…
In this study, a high-chromium cast iron (HCCI) material hardfacing on a low-carbon steel (LCS) plate is fabricated into a symmetrical sandwich structure, which is subjected to multi-pass hot rolling on a rolling mill at a reduction of 15%, 25%, and 35%. The effects of different rolling reductions on the microstructur…