Henan University of Technology

About: Henan University of Technology is a education organization based out in Zhengzhou, China. It is known for research contribution in the topics: Catalysis & Starch. The organization has 7648 authors who have published 6503 publications receiving 73067 citations. The organization is also known as: Hénán Gōngyè Dàxué.

The nanostructure of hemicellulose of crisp and soft Chinese cherry (Prunus pseudocerasus L.) cultivars at different stages of ripeness

Abstract: Atomic force microscopy (AFM) was used to describe and measure the nanostructure of hemicellulose (HC) samples extracted from two cultivars of Chinese cherry, ‘Caode’ (soft) and ‘Bende’ (crisp) at different stages of ripeness. The widths of the HC molecules and aggregates are consistent with little difference between the two cultivars: 23, 29, 34 and 41 nm for ripe soft fruit and 23, 34, 39 and 41 nm for ripe crisp fruit. The results showed that crisp fruit contained a higher percentage of thicker HC chains than soft fruit, suggesting that the thickness of the HC chains may be related to the textural differences observed in the cultivars of the Chinese cherries.

Extraction of Fenugreek (Trigonella foenum-graceum L.) Seed Oil Using Subcritical Butane: Characterization and Process Optimization

Abstract: In this study, the subcritical butane extraction process of fenugreek seed oil was optimized using response surface methodology with a Box-Behnken design. The optimum conditions for extracted oil from fenugreek seed was as follows: extraction temperature of 43.24 °C , extraction time of 32.80 min, and particle size of 0.26 mm. No significant differences were found between the experimental and predicted values. The physical and chemical properties of the oil showed that the oil could be used as edible oil. Fatty acid composition of oils obtained by subcritical butane under the optimum conditions and by accelerated solvent extraction showed negligible difference. The oils were rich in linoleic acid (42.71%–42.80%), linolenic acid (26.03%-26.15%), and oleic acid (14.24%-14.40%). The results revealed that the proposed method was feasible, and this essay shows the way to exploit fenugreek seeds by subcritical butane extraction under the scope of edible oils.

Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells

Abstract: Electron doping in perovskites is an effective approach to design and tailor the structure and property of materials. In A2BB′O6−δ-type double perovskites, B-site cation order can be tunable by A-site modification, potentially leading to significant effect on the oxygen nonstoichiometry of the compounds. La3+-doped Sr2FeMoO6−δ (Sr2−xLaxFeMoO6−δ, SLFM with 0 ≤ x ≤ 1) double perovskites have been designed and characterized systematically in this study as anode materials for solid oxide fuel cells. Rietveld refinement of powder X-ray diffraction reveals a crystalline symmetry transition of SLFM from tetragonal to orthorhombic with the increase of La content, driven by the extra electron onto the antibonding orbitals of eg and t2g of Fe/Mo cations. An increase in Fe/Mo anti-site defect accompanies this phase transition. Solid oxide fuel cells incorporating the Sr1.8La0.2FeMoO6−δ (SLFM2) anode demonstrate impressive power outputs and stable performance under direct CH4 operation because of its altered electronic structure, desired oxygen vacancy concentration and enhanced reducibility. Density functional theory plus U correction calculations provide an insight into how La doping affects the Fe/Mo anti-site defects and consequently the oxygen transport dynamics.