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Frontiers of Materials Science 2014年第3期8卷 256-263页

作者： Shi-Jie ZHU qian LIU ya-feng qian Bin SUN Li-Guo WANG Jing-Min WU Shao-Kang GUAN School of Materials Science and Engineering Zhengzhou University 100 Kexue Road Zhengzhou 450001 China National Centre for Quality Supervision and Inspection of Magnesium and Magnesium Alloy Product No. 1 Xing He Street Hebi 458000 China

The biomagnesium alloys have been considered to be one of the most potential biodegradable metal materials due to its good mechanical compatibility, biological compatibility, biological security and biodegradable characteristics. However, the two major problems of high degradation rates in physiological environment and low mechanical properties prevent the development of biomagnesium alloys. In the present work, the samples of Mg-Zn-Y-Nd alloy were prepared by cyclic extrusion compression （CEC） and equal channel angular pressing （ECAP）. The microstructures, mechanical properties of alloy and its corrosion behavior in simulated body fluid （SBF） were evaluated. The results reveal that Mg-Zn-Y-Nd alloy consists of equiaxial fine grain structure with the homogeneous distribution of micrometer size and nano-sized second phase, which was caused by the dynamic recrystallization during the ECAP and CEC. The corrosion resistance of alloy was improved. The tensile and corrosion resistance were improved, especially the processed alloy exhibit uniform corrosion performances and decreased corrosion rate. This will provide theoretical ground for Mg-Zn-Y-Nd alloy as vascular stent application.

关键词： cyclic extrusion compression equal channel angular pressing extrusion magnesium alloy corrosion

Protective effect of the extract of Yi-Qi-Fu-Mai preparation on hypoxia-induced heart injury in mice

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Chinese Journal of Natural Medicines 2016年第6期14卷 401-406页

作者： feng ya-qian JU Ai-Chun LIU Chun-Hua WANG Ting YU Bo-yang QI Jin State Key Laboratory of Natural Medicines China Pharmaceutical University Jiangsu Key Laboratory of TCM Evaluation and Translational Research China Pharmaceutical University Department of Technology Development Tian Jin Tasly Pride Pharmaceutical Co. Ltd.

Yi-Qi-Fu-Mai(YQFM) is extensively used clinically to treat cardiovascular diseases in China. To explore the anti-hypoxia effect of the extract of YQFM preparation(EYQFM), the EYQFM(1.4, 2.8, and 5.5 g·kg-1·d-1) was assessed for its heart-protective effect in a chronic intermittent hypoxia(CIH) animal model(oxygen pressure 7%-8%, 20 min per day) for 28 days of treatment. Betaloc(0.151 6 g·kg^(-1)·d^(-1)) was used as a positive control. The histopathological analyses of heart in CIH mice were conducted. Several cardiac state parameters, such as left ventricular ejection fractions(EF), stroke volume(SV), expression of creatine kinase(CK), lactate dehydrogenase(LDH), superoxide dismutase(SOD), and malondialdehyde(MDA) were measured. The results showed that treatment with EYQFM markedly reversed swelling of the endothelial cells and vacuolization in the heart when compared with the model group. Further study demonstrated that EYQFM significantly improved ventricular myocardial contractility by increasing EF and SV. In addition, EYQFM inhibited the activity of CK, LDH, decreased the level of MDA and improved SOD activity. The results demonstrated that EYQFM significantly improved the tolerability of myocardium to hypoxia and ameliorated the cardiac damage in the CIH model.

关键词： Extract of YQFM preparation Chronic intermittent hypoxia Cardiac damage

A unique example of 3-D framework based on binuclear dysprosium azobenzene -3,5,4'-tricarboxylate with three, six-connected topology

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A unique example of 3-D framework based on binuclear dyspros...

Atmospheric reductive catalytic fractionation of lignocellulose integrated with one-pot catalytic conversion of carbohydrate yielding valuable lignin monomers and platform chemicals from corn straw

河南省化学会2010年学术年会暨成立70周年庆祝会

作者： Xun feng,Li-ya Wang,qian-qian Sun(College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang,471022)

One kind of the most important types of microporous framework materials is metal aromatic multicarboxylate complexes with high thermal stability and permanent *** pore dimension of the framework is closely associated with the size of the inorganic building units,the length of the organic ligands and the final structural *** regular inorganic SBUs and multicarboxylate

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Green Energy & Environment 2025年第1期10卷 161-172页

作者： Meng-Ying Liu Zhe-Hui Zhang Xue-Qi Wang qian Sun Chen Zhang Yu Li Zhuohua Sun Katalin Barta feng Peng Tong-Qi Yuan State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijing100083China Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry UniversityBeijing100083China Department of Chemistry Organic and Bioorganic ChemistryUniversity of GrazHeinrichstrasse 28/II8010 GrazAustria

Developing a cost-effective and environmentally friendly process for the production of valuable chemicals from abundant herbal biomass receives great attentions in recent ***,taking advantage of the“lignin first”strategy,corn straw is converted to valuable chemicals including lignin monomers,furfural and 5-methoxymethylfurfural via a two steps *** key of this research lies in the development of a green and low-cost catalytic process utilizing magnetic Raney Ni catalyst and high boiling point ethylene *** utilization of neat ethylene glycol as the sole slovent under atmospheric conditions obviates the need for additional additives,thereby facilitating the entire process to be conducted in glass flasks and rendering it highly convenient for scaling *** the initial step,depolymerization of corn straw lignin resulted in a monomer yield of 18.1 wt%.Subsequently,in a dimethyl carbonate system,the carbohydrate component underwent complete conversion in a one-pot process,yielding furfural and 5-methoxymethylfurfural as the primary products with an impressive yield of 47.7%.

关键词： Atmospheric reductive catalytic fractionation Corn straw Ethylene glycol Raney Ni 5-Methoxymethylfurfural

An Efficient Boron Source Activation Strategy for the Low‑Temperature Synthesis of Boron Nitride Nanotubes

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Nano-Micro Letters 2025年第1期17卷 548-558页

作者： Ying Wang Kai Zhang Liping Ding Liyun Wu Songfeng E qian He Nanyang Wang Hui Zuo Zhengyang Zhou feng Ding Yue Hu Jin Zhang yagang yao National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China School of Electronic Information and Artificial Intelligence Shaanxi University of Science&TechnologyXian 710000People’s Republic of China College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXian 710000People’s Republic of China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000People’s Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518000People’s Republic of China College of Chemical and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Lowering the synthesis temperature of boron nitride nanotubes(BNNTs)is crucial for their *** primary reason for adopting a high temperature is to enable the effective activation of highmelting-point solid *** this study,we developed a novel approach for efficiently activating boron by introducing alkali metal compounds into the conventional MgO–B *** approach can be adopted to form various low-melting-point AM–Mg–B–O growth *** growth systems have improved catalytic capability and reactivity even under low-temperature conditions,facilitating the synthesis of BNNTs at temperatures as low as 850℃.In addition,molecular dynamics simulations based on density functional theory theoretically demonstrate that the systems maintain a liquid state at low temperatures and interact with N atoms to form BN *** findings offer novel insights into the design of boron activation and are expected to facilitate research on the low-temperature synthesis of BNNTs.

关键词： Boron nitride nanotubes Low-temperature Boron activation Density functional theory

A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： Quan Shi Yun-Hao Xu Ming-Hui Chen Peng Zhao Wen-Bo Deng Ji Xiong Kai Guo ya-Qing feng Bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

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挤压工艺对复合组织蛋白品质及结构的影响

食品研究与开发 2023年第7期44卷 143-150页

作者：王梦妍李文钊冯亚倩田霄翔阮美娟天津科技大学食品科学与工程学院天津300457

以大豆分离蛋白和蛋清粉为主要原料,利用双螺杆挤压机制备复合组织蛋白。通过单因素和响应面试验对复合组织蛋白挤压工艺进行优化,并分析蛋白质二级结构变化,探索挤压工艺对复合组织蛋白品质的提升机理。结果表明:最佳工艺为水分含量42... 详细信息

以大豆分离蛋白和蛋清粉为主要原料,利用双螺杆挤压机制备复合组织蛋白。通过单因素和响应面试验对复合组织蛋白挤压工艺进行优化,并分析蛋白质二级结构变化,探索挤压工艺对复合组织蛋白品质的提升机理。结果表明:最佳工艺为水分含量42%、机筒温度(Ⅲ区)145℃、螺杆转速17 Hz。该工艺下复合组织蛋白具有独特豆香味、组织均匀有弹性、咀嚼口感好,感官评分最高。蛋白质经挤压处理后无新的特征峰出现,二级结构中α-螺旋和β-转角含量降低,β-折叠和无规则卷曲含量增加,结构稳定性增加。

关键词：大豆分离蛋白蛋清粉复合组织蛋白挤压工艺品质评价二级结构

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冻融对冷冻新疆馕坯及其品质的影响

食品研究与开发 2023年第11期44卷 29-35页

作者：冯亚倩李文钊田霄翔王梦妍阮美娟天津科技大学食品科学与工程学院天津300457

为探究储运过程中冻融频次对冷冻新疆馕坯品质的影响,模拟设计冻融频次试验(0~4次),利用低场核磁共振仪、流变仪、扫描电子显微镜与傅里叶变换红外光谱仪等检测、分析冷冻新疆馕坯的水分结合状态、流变学特性、微观结构及蛋白质二级结... 详细信息

为探究储运过程中冻融频次对冷冻新疆馕坯品质的影响,模拟设计冻融频次试验(0~4次),利用低场核磁共振仪、流变仪、扫描电子显微镜与傅里叶变换红外光谱仪等检测、分析冷冻新疆馕坯的水分结合状态、流变学特性、微观结构及蛋白质二级结构等的变化,并通过烘焙试验综合评价冷冻新疆馕坯的感官品质,考察其烘焙特性。结果表明:随着冻融频次增加,冷冻新疆馕坯拉伸强度与拉伸距离明显降低;其流变学特性(弹性模量G’与黏性模量G’’)呈明显下降趋势;其强结合水不断流失,弱结合水先下降后上升又下降,自由水略有增加;内部微观结构观察显示,冷冻新疆馕坯出现明显的空洞与凹痕;蛋白质内部β-折叠含量降低,β-转角含量增加,有序的蛋白质二级结构变得松散、无序;同时,反复冻融也会导致冷冻新疆馕坯烘焙特性降幅增大,包括馕坯比容降低、硬度升高、综合感官评分降低等,储运过程中冷冻新疆馕坯冻融频次不宜超过4次。

关键词：储运冻融频次冷冻新疆馕坯烘焙特性感官品质

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两种乳化剂对冷冻麻薯坯及其烘烤品质的影响

食品研究与开发 2023年第10期44卷 100-106页

作者：田霄翔李文钊冯亚倩王梦妍阮美娟天津科技大学食品科学与工程学院天津300457

为分别探究蔗糖脂肪酸酯及单硬脂酸甘油酯单独使用时对冷冻麻薯坯及其烘烤品质的影响,对添加不同乳化剂品种及用量的混粉进行糊化特性检测;对冷冻麻薯坯进行动态流变学特性以及水分分布检测;对冷冻麻薯坯烘烤后进行质构、比容测定和感... 详细信息

为分别探究蔗糖脂肪酸酯及单硬脂酸甘油酯单独使用时对冷冻麻薯坯及其烘烤品质的影响,对添加不同乳化剂品种及用量的混粉进行糊化特性检测;对冷冻麻薯坯进行动态流变学特性以及水分分布检测;对冷冻麻薯坯烘烤后进行质构、比容测定和感官评价。结果表明:两种乳化剂均使混粉的衰减值与回生值降低,最大下降量分别为279.00 cP和173.50 cP;适量添加乳化剂可以改善冷冻麻薯坯的弹性模量、黏性模量以及水分分布状态,延缓水分迁移;烘烤品质中,加入两种乳化剂使麻薯面包硬度与对照组相比均降低;比容有所改善;当蔗糖酯添加量为0.40%、单甘酯添加量为0.15%时,综合感官评分分别为84.5和81.0,风味较好。因此,蔗糖酯添加量为0.40%和单甘酯添加量为0.15%对冷冻麻薯坯及其烘烤品质均有较好改善效果。

关键词：蔗糖脂肪酸酯单硬脂酸甘油酯冷冻麻薯坯麻薯面包烘烤品质

Data Mining for Mesoscopic Simulation of Electron Beam Selective Melting

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Engineering 2019年第4期5卷 746-754页

作者： ya qian Wentao yan feng Lin Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing Tsinghua UniversityBeijing 100084China Department of Mechanical Engineering National University of SingaporeSingapore 117576Singapore

In the electron beam selective melting(EBSM)process,the quality of each deposited melt track has an effect on the properties of the manufactured ***,the formation of the melt track is governed by various physical phenomena and influenced by various process parameters,and the correlation of these parameters is complicated and difficult to establish *** mesoscopic modeling technique was recently introduced as a means of simulating the electron beam(EB)melting process and revealing the formation mechanisms of specific melt track ***,the correlation between the process parameters and the melt track features has not yet been quantitatively *** paper investigates the morphological features of the melt track from the results of mesoscopic simulation,while introducing key descriptive indexes such as melt track width and height in order to numerically assess the deposition *** effects of various processing parameters are also quantitatively investigated,and the correlation between the processing conditions and the melt track features is thereby ***,a simulation-driven optimization framework consisting of mesoscopic modeling and data mining is proposed,and its potential and limitations are discussed.

关键词： Electron beam selective melting Mesoscopic modeling Data mining