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Yellowing of fresh-cut spinach(Spinacia oleracea L.)leaves delayed by UV-B applications

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Information Processing in Agriculture 2017年第3期4卷 214-219页

作者： M.Ufuk Kasim Rezzan Kasim Kocaeli University Graduate School of Natural and Applied Sciences Vocational School of Arslanbey41285 KartepeKocaeliTurkiye

In present work,the effects of UV-B treatments on quality of fresh-cut spinach leaves were *** this purpose,spinach leaves grown in glasshouse were harvest,cleaned and placed into polystyrene foam dishes and wrapped by stretch *** packaging,freshcut spinach leaves were treated with UV-B irradiation and were stored at 5℃ temperature for 12 *** soluble solids,visual quality,L^*a^*b^* values,and also hue angle values of samples were determined during *** soluble solids content of samples in control group has been higher than those from samples in UV-B treatments,however,visual quality was lower than the other *** to L*values of the samples,it is found that lower ultraviolet irratiation(UV-B)treatments caused yellowing of samples,and also same result was obtained by b^* and a^* values of fresh-cut spinach ***,hue angles values of samples treated with UV-B for 6min was higher compared with the other ***,yellowing of fresh-cut spinach leaves was decreased,and visual quality scores of samples was increased through ultraviolet irradiation treatments.

关键词： Spinach Fresh-cut Ultraviolet irradiation(UV-B) Yellowing

A significant improvement in adsorption behavior of mesoporous TUD-1 silica through neodymium incorporation

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Journal of Rare Earths 2021年第4期39卷 469-476页

作者： Badria M.Al-Shehri Sahar K.Mohamed Shaykha Alzahly Mohamed S.Hamdy Catalysis Research Group(CRG) Department of ChemistryCollage of ScienceKing Khalid UniversityP.O.Box 2009Abha61413Saudi Arabia Chemistry Department Collage of ScienceUmm Al-Qura UniversityMakkah21421Saudi Arabia Chemistry Department Faculty of ScienceHelwan UniversityAin HelwanCairo11795Egypt King Abdullah Institute for Nanotechnology King Saud UniversityRiyadh11451Saudi Arabia

Neodymium was incorporated into the three-dimensional mesoporous siliceous material *** order to understand the chemical and morphological structure of the prepared material,several characterization techniques were *** characterization results show the formation of highly distributed isolated Nd3+ions incorporated in the silica matrix in tetrahedrally coordinated structure,moreover no aggregation of separate phase(s)was/were *** prepared material was investigated as an adsorbent for methyl green(MG)dye in aqueous solution as a model cationic *** results show higher adsorption capacity for Nd-TUD-1 by almost 24 times higher than the neat parent TUD-1 material and more than 100 times higher than bulky Nd_(2)O_(3)under neutral *** adsorption results were fitted perfectly with pseudo-second-order ***,the adsorption isotherms were perfectly fitted with Freundlich isotherm model which indicates the formation of a multilayer of the dye molecules onto the Nd-TUD-1 surface as a physisorption with endothermic nature.

关键词： Adsorption Neodymium TUD-1 Mesoporous silica Water treatment Kinetics

Effects of alloying elements and thermomechanical process on the mechanical and corrosion properties of biodegradable Mg alloys

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Journal of Magnesium and Alloys 2021年第1期9卷 241-253页

作者： A.Gungor A.Incesu Metallurgical and Materials Engineering Karabuk University78050 KarabukTurkey TOBB Tech.Sciences vocational School Karabuk University78050 KarabukTurkey

In this study,four different Mg-Zn-Ca-Mn alloys were produced using gravity die casting *** content was kept constant in all alloys,while Zn and Ca were added in two different *** heat treatment was applied to all cast alloys and a specimen from each homogenized alloy was hot ***,mechanical properties,and corrosion behavior of the homogenized and hot rolled alloys were investigated as *** results were obtained;grain size decreased significantly with increasing Zn content,Zn promoted Ca 2 Mg 6 Zn 3 phase formation,corrosion resistance increased with increasing Zn/Ca atomic ratio,hot rolling resulted in much higher tensile strength but much lower ductility and *** the homogenized and hot rolled alloys,ZXM300-h alloy(hot rolled ZXM300 alloy)with its 146±2.5 MPa yield strength,229±3.7 MPa tensile strength,%1.6±0.1 elongation and 0.029 mm/*** corrosion rate exhibited the best mechanical properties and corrosion resistance to be used as a biodegradable alloy such as fracture bone plate material.

关键词： Biodegradable Mg alloys Hot rolling

Effects of Laser Re-heating on Microstructure and Electric Properties of PSN-PZT Ceramics

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Journal of the Chinese Ceramic Society 2016年第4期3卷 153-158页

作者： ZHANG Jing ZHENG Deyi PENG Guigui CHENG Cheng HU Shunmin ZHANG Hao collage of Material and Metallurgy of Guizhou University

Lead zirconate titanate(PSN-PZT) is widely utilized in various areas based on its desirable piezoelectrical properties and stable *** order to further improve its electrical properties,the ceramic samples,which have been prepared by traditional solid-state sintering,then are re-heated by strong laser *** composition and micro-structure have been characterized through XRD,SEM and ***,Quasi-static d_(33) tester and the capacitance tester have been introduced for measuring electrical *** experimental results indicate that the ceramic samples are with more amount percentage tetragonal phase after laser *** could be induced and initialized by higher input laser *** results suggested that,when the input laser power is at 1000 W,tetragonal and rhombohedral phases are co-existed and the ceramic samples are with the best electrical *** ceramics heated by power of 1000 W present excellent electric properties,d_(33) increased 24.8%,and tanS decreased 9%,which is distinguish advance compared with original ceramics in solid reaction.

关键词： PSN-PZT ceramics laser re-heating electrical properties

Analyses of dynamic characteristics of a fluid-filled thin rectangular porous plate with various boundary conditions

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Acta Mechanica Solida Sinica 2017年第1期30卷 87-97页

作者： Yu Xiang Automotive and Transportation Engineering collage Guangxi University of Science and Technology Liuzhou 545006 China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and Technology Liuzhou 545006 China

Based on the classical theory of thin plate and Biot theory, a precise model of the transverse vibrations of a thin rectangular porous plate is proposed. The first order differential equations of the porous plate are derived in the frequency domain. By considering the coupling effect between the solid phase and the fluid phase and without any hypothesis for the fluid displacement, the model presented here is rigorous and close to the real materials. Owing to the use of extended homogeneous capacity precision integration method and precise element method, the model can be applied in higher frequency range than pure numerical methods. This model also easily adapts to various boundary conditions. Numerical results are given for two different porous plates under different excitations and boundary conditions.

关键词： Thin rectangular porous plate Blot theory Vibration First order differential equations Extended homogeneous capacity high precision integration method

Correlation Analysis between Economic Growth and Environmental Quality

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Computer Systems Science & Engineering 2022年第4期41卷 127-140页

作者： Baiqing Zhou Na Li Duan Lu Jinyue Xia Huzhou vocational&Technical College Huzhou313000China International Business Machines Corporation(IBM) New YorkNYUSA

With the rapid development of the economy,China’s environment has been damaged severely,which has attracted much attention from scholars and the local *** concept of green development has been an underlying trend since 2012,and it is of great signiﬁcance to explore the relationship between economic growth and environmental *** is a prefecture-level city under the jurisdiction of Zhejiang Province,and it is one of the 27 cities in the central area of the Yangtze River *** recent years,this city develops well not only in economic development but also in maintaining a green *** the paper,the back propagation neural network is used to evaluate the local environmental ***,the panel model is exploited to analyze the relationship between economic growth and environmental *** the data presented in the paper range from the year 2008 to *** analysis indicates that the evaluation value of environmental quality,the emissions of industrial SO2,and waste water exhibit an inverted U-shaped relationship with economic *** for the regression results,the inﬂection point of income in the environmental Kuznets curve of the model which takes the evaluation value of the environmental quality as a dependent variable is higher than that of the model which takes the SO2 emission as an independent *** research result would help the local government to take appropriate countermeasures to improve the environment and economy.

关键词： Economic growth environmental quality BP neural network environmental Kuznets curve

Synthesis and Adsorption Properties of Chelating Resins Containing Sulfoxide and Heterocyclic Functional Groups

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Chinese Chemical Letters 2006年第10期17卷 1313-1316页

作者： Chun Nuan JI Xiu Juan ZHANG Rong Jun QU Hou CHEN Chun Hua WANG Chang Mei SUN School of Chemistry and Materials Science Yantai Normal University Yantai 264025 Elementary department Yantai Vocational College Yantai 264025

Several of new chelating resins containing sulfoxide and heterocyclic functional groups （3-aminopyridine and 2-mercaptobenzothiazole） based on macroporous chloromethylated polystyrene were synthesized and characterized by elemental analysis and infrared spectra. Their adsorption capacities towards Zn^2＋, Cu^2＋, Pb^2＋, Hg^2＋ and Ag^＋ at pH 3.0 and 6.0 were investigated in detail. It was found that the adsorption capacities of the resins containing bis[（3-pyridylaminoethyl）sulfoxide or （2-benzothiazolylthioethyl）sulfoxide for the above ions were higher than that on ones containing single above-mentioned groups.

关键词： Chelating resins heterocyclic functional groups sulfoxide distribution coefficient,metal ions.

Study on data association algorithm of multi-passive-sensor location system

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Journal of Systems Engineering and Electronics 2005年第3期16卷 489-493页

作者：周莉何友张维华 Math &Information Coll . Ludong Univ Research Inst .of Information Fusion Naval Aeronautical Engineering Inst Yantai vocational Coll

Aiming at three-passive-sensor location system, a generalized 3-dimension （3-D） assignment model is constructed based on property information, and a multi-target programming model is proposed based on direction-finding and property fusion information. The multi-target programming model is transformed into a single target programming problem to resolve, and its data association result is compared with the results which are solved by using one kind of information only. Simulation experiments show the effectiveness of the multi-target programming algorithm with higher data association accuracy and less calculation.

关键词： data association algorithm multi-target programming model joint information cost matrix.

Characteristics of Diesel/N-Butanol Blend on a Common Rail Diesel Engine with Exhaust Gas Recirculation

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Energy Engineering 2022年第3期119卷 1239-1259页

作者： Yanfei Chen Jingjing He Hao Chen Xin Su Bin Xie Nanjing vocational Institute of Transport Technology Nanjing211188China School of Automobile Chang’an UniversityXi’an710064China

20%n-butanol is blended in diesel by volume(noted as D80B20)and experiment has been carried out to study the effect on the combustion and emission characteristics based on a common rail diesel engine with exhaust gas recirculation(EGR)*** results reveal thatD80B20 has longer ignition delay,shorter combustion duration and higher maximumin-cylinder temperature than pure diesel(noted as D100).Further,the number concentration and volume concentration of ultrafine particles decrease significantly while NO_(X) emissions increase a little with the addition of *** the exhaust gas is induced into cylinder,NO_(X) emissions significantly decrease and ultrafine particles emissions *** number geometric mean diameters and volume geometricmean diameters of ultrafine particles increase withEGR *** toD100 without EGR,D80B20 with 20%EGR ratio can reduce both NO_(X) and ultrafine particles emissions at 0.14MPa BMEP and 0.56MPa BMEP.

关键词： n-butanol ultrafine particles combustion emission common rail diesel engine