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Chinese Journal of Chemistry 2021年第12期39卷 3245-3254页

作者： Huizhi Yang Yufeng Bai Chunhua ge Shangyu Li Xiangdong Zhang College of Chemistry Liaoning UniversityChongshan Road No.66ShenyangLiaoning 110036China

Polyethylene glycol(PEG)as phase change material(PCM)and carboxyl-rich carbon(RHTC)with different carboxyl content was introduced to prepare RHTC/PEG *** composites have high thermal conductivity,photothermal conversion ability,and improved the phase change enthalpy of the *** microstructure and thermal properties of the samples were analyzed by various characterization *** promoted the benign growth of PEG crystallinity(110.0%),influenced the phase change enthalpy of PEG,and improved the latent heat storage capacity of *** non-leakage loading of PEG in the composites can be as high as 97 wt%,and the actual phase change enthalpy is 10.7 J/g higher than that of pure PEG,10%higher than the theoretical *** to the heat storage bridge formed between PEG and RHTC,the thermal conductivity of the composites was up to 0.51 W/mK,which was 99.4%higher than that of ***,the introduction of environmentally friendly and low-cost RHTC gives the composites excellent photothermal conversion capability,and its photothermal conversion energy storage efficiency is as high as 90.1%.These results prove that the prepared composites are promising potential candidates in the field of thermal storage and thermal management systems.

关键词： Latent heat storage Carboxylation Renewable resources Photothermal conversion capacity Thermochemistry

The concave-wall jet characteristics in vertical cylinder separator with inlet baffle component

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Chinese Journal of Chemical Engineering 2022年第2期35卷 178-189页

作者： Jing Zhang Zhongyi ge Wei Wang Bin Gong Yaxia Li Jianhua Wu New Chemical Technology Transfer and Promotion Center of Liaoning Province Shenyang University of Chemical TechnologyShenyang 110142China School of Chemical Engineering&Technology Tianjin UniversityTianjin 300350China

The concave-wall jet was formed in the vertical cylinder separator with inlet baffle *** effect of curvature of radial baffle on the jet flow in the separator was investigated by the experiment of concentration and the numerical simulation of species *** results show that the concave-wall jet was confined within the narrow region near the concave-wall and the flow disturbance in the center of separator was *** distribution of concentration and the flow region of wall jet depended on the curvature of radial baffle(K).Compared with the turbulent intensity of the plate baffle(K=0),that of concave baffle(K=2)reduced by 6.1%and the turbulent intensity of convex baffle(K=-2)increased by 13.5%.The best flow stability was obtained by the concave baffle because the baffle outlet was similar to convergent *** outlet convergent angle was between 0°and 19.5°when 0≤K≤*** secondary vortices were caused by the tangential velocity irregularity on the cross-section of two axial baffles in the separator with convex *** baffle with K≥0 was more suitable in separator inlet than that with K<0.

关键词： Concave-wall jet Baffle component Curvature Concentration Numerical simulation

Microwave-assisted synthesis of new N^4-[bi-(4-fluorophenyl)-methyl]-piperazine thiosemicarbazones under solvent-free conditions

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Chinese Chemical Letters 2008年第9期19卷 1035-1038页

作者： qing Han Li Zhi Gang Zhao College of Chemistry and Environmental Protection Engineering Southwest University for Nationalities Chengdu 610041 China

Six new N4-[bi-（4-fluorophenyl）-methyl]-piperazine thiosemicarbazones 3a-f have been prepared starting from [bi-（4-fluorophenyl）-methyl]-piperazine in solvent-free condition under microwave irradiation with excell... 详细信息

关键词： bi-(4-Fluorophenyl)-methyl]-piperazine Thiosemicarbazones Microwave irradiation Solvent-free Organic synthese

Characterization of Lysine Monomethylome and Methyltransferase in Model Cyanobacterium Synechocystis *** 6803

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genomics, Proteomics & Bioinformatics 2020年第3期18卷 289-304页

作者： Xiaohuang Lin Mingkun Yang Xin Liu Zhongyi Cheng Feng ge State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China Key Laboratory of Algal Biology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100039China Jingjie PTM BioLab(Hangzhou)Co.Ltd Hangzhou 310018China

Protein lysine methylation is a prevalent post-translational modification(PTM)and plays critical roles in all domains of ***,its extent and function in photosynthetic organisms are still largely *** are a large group of prokaryotes that carry out oxygenic photosynthesis and are applied extensively in studies of photosynthetic mechanisms and environmental *** we integrated propionylation of monomethylated proteins,enrichment of the modified peptides,and mass spectrometry(MS)analysis to identify monomethylated proteins in Synechocystis *** 6803(Synechocystis).Overall,we identified 376 monomethylation sites in270 proteins,with numerous monomethylated proteins participating in photosynthesis and carbon *** subsequently demonstrated that Cpc M,a previously identified asparagine methyltransferase in Synechocystis,could catalyze lysine monomethylation of the potential aspartate aminotransferase Sll0480 both in vivo and in vitro and regulate the enzyme activity of *** loss of Cpc M led to decreases in the maximum quantum yield in primary photosystemⅡ(PSⅡ)and the efficiency of energy transfer during the photosynthetic reaction in *** report the first lysine monomethylome in a photosynthetic organism and present a critical database for functional analyses of monomethylation in *** large number of monomethylated proteins and the identification of Cpc M as the lysine methyltransferase in cyanobacteria suggest that reversible methylation may influence the metabolic process and photosynthesis in both cyanobacteria and plants.

关键词： Cyanobacteria Lysine monomethylation Lysine methyltransferase Post-translational modification Aspartate aminotransferase

Prevalence of Undernutrition and Related Dietary Factors among People Aged 75 Years or Older in China during 2010-2012

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Biomedical and Environmental Sciences 2018年第6期31卷 425-437页

作者： LIU Zhen PANG Shao Jie MAN qing qing WANG Jing Zhong ZHAO Wen Hua ZHANG Jian National Institute for Nutrition and Health Chinese Center for Disease Control and Prevention

Objective Undernutrition is highly prevalent among older people. The aim of this study was to estimate the prevalence of undernutrition in elderly Chinese residents and explore the relationship between undernutrition and dietary factors. Methods Data were collected from 2,552 elderly people aged 75 years and over from the Chinese Nutrition and Health Surveillance during 2010-2012 using questionnaires, anthropometric measurement, and individual consecutive 3-day 24-hour dietary records. Results The present study showed that 10.5% of participants had undernutrition. The prevalence was higher among the population living in rural areas, those living in the South region, those who smoked, and those with low income levels. Most participants failed to meet the Chinese Dietary Reference Intakes for energy（66.1%） and protein（72.1%）. When comparing quartiles of food intake, high rice consumption [odds ratio（OR） = 2.44, 95% confidence interval（CI）： 1.35-4.40）], animal oil intake（OR = 1.60, 95% CI： 1.18-2.17）, and high fat intake from animal sources（OR = 1.56, 95% CI： 1.06-2.31） were positively associated with underweight whereas high wheat consumption（OR = 0.44, 95% CI： 0.26-0.74）, a proper proportion（24%-32%） of energy intake from fat（OR = 0.54, 95% CI： 0.35-0.83）, and high fat intake from plant sources（OR = 0.67, 95% CI： 0.46-0.99） were inversely *** The prevalence of undernutrition was high among elderly Chinese people, especially in rural areas. Dietary factors, such as high consumption of rice, were associated with undernutrition.

关键词： Undernutrition Dietary Elderly adults Cross-sectional study

Clinical Characteristics of Macular Hole and Macular Epiretinal Membrane in Dominant and Nondominant Eyes

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Biomedical and Environmental Sciences 2023年第1期36卷 112-116页

作者： LIU Yang WANG Xin ZHU Min XU ge Zhi Eye Institute and Department of Ophthalmology Eye&ENT HospitalFudan UniversityNHC Key Laboratory of Myopia(Fudan University)Key Laboratory of MyopiaChinese Academy of Medical SciencesShanghai Key Laboratory of Visual Impairment and RestorationShanghai 200031China

Ocular dominance(OD) is referred to the superiority of one eye over the other when the visual sense is produced[1]. This condition can be considered as a preference for the particular laterality of the eye during a mono-visual task or the relative contributions of visual signal transduction between eyes[2]. Empirically, OD tendencies are exhibited in habitual and subconscious behavior.

关键词： visual dominance superiority

Unregulated emissions from a diesel engine equipped with vanadium-based urea-SCR catalyst

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Journal of Environmental Sciences 2010年第4期22卷 575-581页

作者： Lei Jiang Yunshan ge Asad Naeem Shah Chao He Zhihua Liu School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 China. Department of Mechanical Engineering University of Engineering and Technology Lahore 54000 Pakistan School of Transportation Machinery and Civil Engineering Southwest Forestry College Kunming 650224 China

The present work is aimed at the study of number-size distribution of particles, volatile organic compounds （VOCs）, and carbonyl compounds （CC） or carbonyls emitted from a 4-cylinder turbocharged diesel engine equipped with a vanadium-based urea selective catalytic reduction catalyst. The engine was run on an electric dynamometer in accordance with the European steady-state cycle. Pollutants were analyzed using an electric low pressure impactor, a gas chromatograph/mass spectrometer, and a high performance liquid chromatography system for the number-size distribution of particles, VOCs, and CC emissions, respectively. Experimental results revealed that total number of particles were decreased, and their number-size distributions were moved from smaller sizes to larger sizes in the presence of the catalyst. The VOCs were greatly reduced downstream of the catalyst. There was a strong correlation between the conversion of styrene and ethyl benzene. The conversion rate of benzene increased with increase of catalyst temperature. Formaldehyde, acetaldehyde, acrolein and acetone were significantly reduced, resulting in a remarkable abatement in carbonyls with the use of the vanadium-based urea-SCR system.

关键词： diesel engine selective catalytic reduction particulate volatile organic compounds carbonyls

Luminescent properties of Mg_(1.99)SnO_(4):0.01Mn^(2+)phosphors dopedwith Zn^(2+)

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Journal of Materiomics 2023年第3期9卷 510-515页

作者： ge Gao Qiang Li Pengxiao Hao Xiao Huang Hongjie Luo School of Materials Science and Engineering Shanghai UniversityShanghai200444China Institute for the Conservation of Cultural Heritage Shanghai UniversityShanghai200444China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai200050China

n this work,a series of Zn_(x)Mg_(1.99-x)SnO_(4):0.01Mn^(2+)(x=0,0.01,0.02,0.03,0.04)green long afterglow phosphors are prepared by high-temperature solid-phase *** photoluminescence and long afterglow performance of host material doped with Zn^(2+)are *** results show that the emission peak of Mn^(2+)is red-shifted by 5 nm with increasing Zn^(2+)***_(0.03)Mg_(1.96)SnO_(4):0.01Mn^(2+)phosphor has the strongest green luminescence intensity with the chroma-ticity coordinates of(0.0857,0.6083)under 270 nm,and Zn_(0.01)Mg_(1.98)SnO_(4):0.01Mn^(2+)phosphor has su-perior long afterglow performance with average lifetime of *** afterglow decay and thermoluminescence curve of phosphor are used to explain the mechanism of long afterglow ***,the afterglow intensity distribution of each pixel in Zn_(0.01)Mg_(1.98)SnO_(4):0.01Mn^(2+)coating samples is carried out by hyperspectral imaging,and the optimal luminescence intensity and uniformity of the sample are obtained at a phosphor/epoxy mass ratio of ***,Zn_(0.01)Mg_(1.98)SnO_(4):0.01Mn^(2+)can be a potential candidate of novel long afterglow phosphors,and hyperspectral imaging also provides new research approaches for the rational proportioning of luminescent materials.

关键词： Long afterglow luminescent Mg_(1.99)SnO_(4):0.01Mn^(2+) Hyperspectral imaging

Contracted product of hypermatrices via STP of matrices

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Control Theory and Technology 2023年第3期21卷 265-280页

作者： Daizhan Cheng Min meng Xiao Zhang Zhengping Ji Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China Department of Control Science and Engineering School of Electronics and Information EngineeringTongji UniversityShanghai 201210China National Center for Mathematics and Interdisciplinary Sciences Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100149China

An equivalent definition of hypermatrices is *** matrix expression of hypermatrices is *** permu-tation matrices,the conversion between different matrix expressions is *** various kinds of contracted products of hyper... 详细信息

关键词： d-hypermatrix Matrix expression Permutation matrices-Contracted product Semi-tensor product(STP)

The effect of metal ions with different valences on the retardation of soil–bentonite barrier materials and its mechanism

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Chinese Chemical Letters 2013年第12期24卷 1075-1079页

作者： Shu-qing Lv Yong-Sheng Zhao Key Laboratory of Groundwater Resources and Environment Ministry of Education Jilin University

In this paper, with K＋, Ca2＋ and Fe3＋ as the objects of study, retardation of soil-bentonite （SB） barrier materials for metal ions with different valences is investigated, and the adsorption mechanism, migration patterns and permeation behavior are explored so as to provide a theoretical basis for their application. The results show that the adsorption process for metal ions with different valences by SB barrier materials is fast, and the higher the valence, the greater the adsorption capacity. The fitting of the adsorption process conforms to pseudo-second-order adsorption kinetics and Langmuir-Freundlich adsorption equation, which explains that chemical adsorption is the dominating state and that the SB surface has certain heterogeneity. The permeability coefficient of K＋, Ca2＋ and Fe3＋ in SB each has a maximum and the higher the valence, the sooner the maximum appears. Also the higher the valence, the more obvious the effect on SB retardation performance; and the sooner the ion breaks through the barrier wall completely, that is, the wall＇s retardation performance for higher valent ions may decline.

关键词： Metal ions Soil-bentonite Barrier materials Retardation Mechanism