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Study on reaction characteristics of phenolic hydroxyl in coal by using the model compound during direct coal liquefaction

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Journal of Coal Science & Engineering(China) 2013年第4期19卷 540-545页

作者： Bo-wen ma Xiao-Su ZHU wen-Bo LI Xiao-Jing ZHANG Shu-Feng DU State Key Laboratory of Coal Mining and Clean Utilization Beijing 100013 China Beijing Research Institute of Coal Chemistry China Coal Research Institute Beijing 100013 China

The reaction characteristics of phenolic hydroxyl group were studied under the conditions of direct coal liquefaction. 2-naphthol was used as a coal model compound in this study. Under the conditions of with and without catalysts, a series of experiments were conducted at different temperatures, pressures and reaction time. Gas chromatography-mass spectrometry and gas chromatography were used to identify and quantify the reactants and products respectively. The conversion of 2-naphthol rises with the increase of reaction temperature, initial pressure and catalyst amount. The results indicated that tem- perature had a significant effect on 2-naphthol conversion, which promoted the dehydroxylation reaction. However, initial pressure had an important influence on the hydrogenation of 2-naphthol and naphthalene. The iron catalyst plays a significant role of cracking instead of hydrogenation. It is concluded that the harsh reaction conditions of high temperature, high pressure, and more catalyst are conducive to promoting dehydroxylation of 2-naphthol. The reaction mechanism was put forward based the experimental results, in which 2-tetralone was an intermediate.

关键词： direct coal liquefaction model compound phenolic hydroxyl reaction characteristics

叶面肥与基肥配施对夏大豆光合性能、产量和品质的影响

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陕西农业科学 2025年第01期71卷 51-55页

作者：屈洋马雯刘晓婷薛玉莹王可珍宝鸡市农业科学研究院

为筛选适宜夏大豆的叶面肥和基肥配施方式，提高大豆的产量和品质，以宝豆10号为试验材料，采用二因素裂区试验设计，设置主处理磷酸二氢钾喷施浓度0%（P1）、1.0%（P2）、1.5%（P3）和2.0%（P4）4个水平，设置副处理复合肥施肥量150 kg... 详细信息

为筛选适宜夏大豆的叶面肥和基肥配施方式，提高大豆的产量和品质，以宝豆10号为试验材料，采用二因素裂区试验设计，设置主处理磷酸二氢钾喷施浓度0%（P1）、1.0%（P2）、1.5%（P3）和2.0%（P4）4个水平，设置副处理复合肥施肥量150 kg/hm2（F1）、225 kg/hm2（F2）、300 kg/hm2（F3）和375 kg/hm2（F4）4个水平，研究叶面肥和基肥配施对夏大豆产量构成因素、光合性能、产量和籽粒品质的影响。结果表明，叶面肥和基肥对夏大豆叶片的花期和荚期的SPAD值和Pn均有显著影响；叶面肥、基肥以及它们的互作效应对夏大豆的单株粒数、百粒重和产量具有极显著影响，其中P3F4产量达到4 165.70 kg/hm2,与其它处理差异显著（P<0.05）。叶面肥、基肥、叶面肥×基肥对夏大豆籽粒蛋白质含量、脂肪含量、异黄酮含量存在极显著影响（P<0.01）,P1F3蛋白质含量最高达到45.51%,P4F3脂肪含量和异黄酮含量最高分别达到19.68%和0.462 6%。叶面肥、基肥以及它们的互作效应对夏大豆花期、荚期的光合性能、产量构成因素和籽粒品质存在重要影响。基肥施入量375 kg/hm2时在花期喷施1.5%磷酸二氢钾水溶液可有效改善夏大豆叶片的光合性能、产量构成因素，并可获得较好的产量优势和籽粒品质。

关键词：叶面肥基肥光合性能产量品质夏大豆

Characteristics and Kinetics of Nitrobenzene Reduction by Sucrose-modified Nanoiron

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Chemical Research in Chinese Universities 2013年第4期29卷 765-770页

作者： LI Hui ZHAO Yong-sheng ZHAO Ran ma Bai-wen CHEN Zi-fang SU Yan ZHOU Rui Key Laboratory of Groundwater Resources and Environment Ministry of Education Jilin University Changchun 130021 P. R. China Department of Chemistry & Biochemistry College of Liberal Arts & Science Arizona State University Phoenix 85001 USA State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eeo-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China

Sucrose-modified nanoscale zero-valent iron（SM-NZVI） was prepared with liquid phase reducing method, and characterized by transmission electron microscopy（TEM） and X-ray diffraction（XRD） for the shape and structure The size of SM-NZVI particles was about 100--150 nm and they displayed better dispersity. The degradation of ni- trobenzene（NB） in water by SM-NZVI was carried out in batch experiments. The results indicate that the efficiency of NB reduction via SM-NZVI increased by 44.24% compared with that via NZV, I, and coexistent Ca2＋, Mg2＋, HCO3- and other ions showed little effect on NB reduction but negative influence on aniline（AN） production. Furthermore, the kinetic researches indicate that NB reduction with SM-NZVI could be described by pseudo first-order kinetic model at different initial pH values and iron dosage. The oxidation products of iron were mainly Fe304 and Fe203 with irregular shape.

关键词： Nanoiron Sucrose Nitrobenzene Reduction reaction Kinetic

Science and Technology Backyard: A novel approach to empower smallholder farmers for sustainable intensification of agriculture in China

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Journal of Integrative Agriculture 2019年第8期18卷 1657-1666页

作者： JIAO Xiao-qiang ZHANG Hong-yan ma wen-qi WANG Chong LI Xiao-lin ZHANG Fu-suo Center for Resources Environment and Food Security Department of Plant Nutrition/Key Laboratory of Plant-Soil InteractionsMinistry of Education China Agricultural University Beijing 100193 P.R.China College of Resources and Environment Science Hebei Agricultural University Baoding 071001 P.R.China

Sustainable feeding of the growing population in China without ecological destabilization is a grand challenge. In this populous country where agriculture is dominated by smallholder farming, developing innovative technology and translating scientific knowledge into action for smallholder farmers is a crucial step in addressing this challenge. Here, we present a novel approach for technology innovation and dissemination to achieve sustainable intensification in the fields of smallholder farmers. The Science and Technology Backyard(STB) is a hub in a rural area that links knowledge with practices to promote technology innovation and exchange. In this study, the framework and functions of STB are introduced, and the key implications for sustainable intensification across millions of smallholder farmers are explicitly stated:(i) develop innovative technology based on stated demands of farmers;(ii) disseminate technology by innovative social service models though combined top-down approaches with bottom-up measures to enable smallholders in rural areas. This paper provides a perspective on transformation of small-scale agriculture toward sustainable intensification in China and useful knowledge applicable to other developing countries.

关键词： smallholder farmers sustainable intensification technology innovation technology transfer Science and Technology Backyard

Effect of Electroacupuncture on Spermatogenesis in Rats with Oligozoospermia of Insufficiency of Shen(Kidney) Essence Syndrome

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Chinese Journal of Integrative Medicine 2019年第4期25卷 292-297页

作者： CUI Tian-wei QIN mao LIU Bao-xing GAO Yun-xiao ma wen-jing ZHANG Xiu-ping Department of Andrology China-Japan Friendship HospitalBeijing(100029)China Department of Andrology Chongqing Health Center for Women and ChildrenChongqing(400013)China

Objective: To assess the effect of electroacupuncture(EA) on expression of cytoskeletal proteins from Sertoli cells(SCs) and spermatogenesis in rats with oligozoospermia of insufficiency of Shen(Kidney)essence syndrome(OIKES).Methods: Twenty healthy male Sprague-Dawley rats were randomly assigned to four groups using a random number table: control,tripterygium glycosides(TG) treatment,sham and EA groups(n=5 in each group).A rat model of OIKES was established by oral gavage with *** EA group was treated with TG and received EA at Shenshu(BL 23) and Zusanli(ST 36) acupoints for 20 min,once daily for 30 days,while the sham group received EA at identical acupoints with skin penetration without *** 30 days,the ?nal body weight and coef?cients for the testis and epididymis were calculated and sperm parameters were *** analyses were performed to detect expression of vimentin and α-tubulin in SCs and proliferating cell nuclear antigen(PCNA) immunoreactivity in germ *** in germ cells was quanti?ed by the transferase biotin-dUTP nick end labeling ***: Compared with the control group,the final body weight and testis/epididymis coefficients of rats in the TG-treated group were not significantly different,but the sperm count and motility were lower(Pmarkedly,and signi?cantly enhanced PCNA immunoreactivity with decreased apoptosis in germ cells(Pmatogenesis in rats with *** effect seems to

关键词： electroacupuncture Sertoli cells cytoskeletal proteins oligozoospermia insufficiency of Shen(Kidney)essence syndrome

Impacts of data sources on the predictive performance of species distribution models:a case study for Scomber japonicus in the offshore waters southern Zhejiang,China

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Acta Oceanologica Sinica 2024年第12期43卷 113-122页

作者： wen ma Ling Ding Xinghua Wu Chunxia Gao Jin ma Jing Zhao College of marine Living Resource Sciences and management Shanghai 201306China College of the Environment and Ecology Xiamen UniversityXiamen 361102China Shanghai Investigation Design&Research Institute Co.LtdShanghai 200335China China Three Gorges Corporation Wuhan 430010China The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources Shanghai Ocean UniversityShanghai 201306China

As our understanding of ecology deepens and modeling techniques advance,species distribution models have grown increasingly sophisticated,enhancing both their fitting and predictive ***,the dependability of predictive accuracy remains a critical issue,as the precision of these predictions largely hinges on the quality of the base *** developed models using both field survey and remote sensing data from 2016 to 2020 to evaluate the impact of different data sources on the accuracy of predictions for Scomber japonicus *** research findings indicate that the variability of water temperature and salinity data from field suvery is significantly greater than that from remote sensing *** the same season,we found that the relationship between the abundance of *** and environmental factors varied significantly depending on the data *** using field survey data were able to more accurately reflect the complex relationships between resource distribution and environmental ***,in terms of model predictive performance,models based on field survey data demonstrated greater accuracy in predicting the abundance of *** compared to those based on remote sensing data,allowing for more accurate mastery of their spatial distribution *** study highlights the significant impact of data sources on the accuracy of species distribution models and offers valuable insights for fisheries resources management.

关键词： species distribution model remote sensing data field survey data predictive performance offshore waters southern Zhejiang Scomber japonicus

Titanium nitride nanorod array/carbon cloth as flexible integrated host for highly stable lithium-sulfur batteries

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Rare Metals 2023年第12期42卷 4115-4127页

作者： Rui-Qing Liu Feng Jin Min Gu Dong-wen Zhang Lu-Lu He wen-Xiu Liu wen-Feng Zhu Kun Xie Jing-Yi Wu Yi-Ran Liu Wei-Wei Yang Xiu-Jing Lin Li Shi Xiao-Miao Feng Zhen Hou Ji-Gang Zhou Yan-wen ma State Key Laboratory of Organic Electronics and Information Displays and Institute of Advanced materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Department of Applied Physics The Hong Kong Polytechnic UniversityHung Hom 1000872Hong KongChina Canadian Light Source Inc. University of SaskatchewanSaskatoonSK S7N 2V3Canada Suzhou Vocational Institute of Industrial Technology Suzhou 215104China

Lithium-sulfur(Li-S)batteries have been regarded as promising energy-storage systems,due to their high theoretical capacity and energy ***,the carbonaceous sulfur hosts suffer from weak binding force between the hosts and polysulfides,restricting the cyclic stability of sulfur ***,the presence of binder and conductive agent in the traditional electrode reduces its energy *** study demonstrates that titanium nitride(TiN)nanorod array on carbon cloth(CC)is employed as a flexible host for highly stable Li-S batteries via solvothermal synthesis-nitridation *** the one hand,the flexible integrated network composed of three-dimensional TiN nanorod array and CC significantly improves the conductivity,increases the electron transport and electrolyte penetration of *** the other hand,the 3D structure of TiN/CC and the enhanced polarity of TiN effectively strengthen the physical and chemical double adsorption for *** a result,the combination of TiN nanorod array and CC synergistic ally promotes sulfur utilization and electrochemical performances of S@TiN/CC cathode.A discharge capacity of1015.2 mah·g^(-1)at 0.5C after 250 cycles and 604.1mah·g^(-1)at 3C after 250 cycles is *** a larger current density of 5C,the resulting S@TiN/CC cathode maintains a high discharge capacity of 666.6 mah·g^(-1)and the Coulombic efficiency of about 100%.

关键词： Titanium nitride Nanorod array Integrated structure Chemical adsorption Lithium-sulfur batteries

Stable yellow light emission from lead-free copper halides single crystals for visible light communication

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Nano materials Science 2023年第1期5卷 78-85页

作者： Baiqian Wang Yuru Tang Xin Yang wensi Cai Ru Li wen ma Shuangyi Zhao Chen Chen Zhigang Zang Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) Chongqing UniversityChongqing400044China School of Microelectronics and Communication Engineering Chongqing UniversityChongqing400044China

Yellow light-emitting diodes(LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and the available perovskites yellow LEDs suffer from the instability. Herein, a pressure-assisted cooling method is proposed to grow lead-free CsCu2I3single crystals, which possess uniform surface morphology and enhanced photoluminescence quantum yield(PLQY) stability, with only 10% PLQY losses after being stored in air after 5000 ***, the single crystals used for yellow LEDs without encapsulation exhibit a decent Correlated Color Temperature(CCT) of 4290 K, a Commission Internationale de l’Eclairage(CIE) coordinate of(0.38, 0.41), and an excellent 570-h operating stability under heating temperature of 100°C. Finally, the yellow LEDs facilitate the application in wireless visible light communication(VLC), which show a-3 dB bandwidth of 21.5 MHz and a high achievable data rate of 219.2 Mbps by using orthogonal frequency division multiplexing(OFDM) modulation with adaptive bit loading. The present work not only promotes the development of lead-free single crystals, but also inspires the potential of CsCu2I3in the field of yellow illumination and wireless VLC.

关键词： Lead-free copper halides Single crystals Yellow light-emitting diodes Visible light communication(VLC)

Near-unity quantum yield in zero-dimensional lead-free manganese-based halides for flexible X-ray imaging with high spatial resolution

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eScience 2023年第2期3卷 103-111页

作者： wen ma Dehai Liang Qingkai Qian Qionghua Mo Shuangyi Zhao wensi Cai Jiangzhao Chen Zhigang Zang Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) Chongqing UniversityChongqing400044China

Low-dimensional luminescent lead-free metal halides have received substantial attention due to their unique optoelectronic *** them,zero-dimensional(0D)manganese(II)-based metal halides with negligible self-absorption have emerged as potential candidates in X-ray ***,we for the first time report a novel lead-free(TBA)_(2)MnBr_(4) single crystal synthesized via a facile solvent evaporation *** this crystal,[MnBr_(4)]^(2-)units are isolated by large TBA^(+)organic cations,resulting in a unique 0D *** prepared manganese-based crystals exhibit a bright-green emission centered at 512 nm with a high photoluminescence quantum yield(PLQY)of 93.76%at room temperature,originating from the ^(4)T_(1)–^(6)A_(1) transition of Mn^(2+).Apart from their outstanding optical performance,the crystals also show excellent stability and can maintain 94.4%of the initial PLQY even after being stored in air for 90 ***(TBA)_(2)MnBr4 films prepared as X-ray imaging scintillators exhibit a low detection limit of 63.3 nGyair/s,a high light yield of 68000 ph/MeV,and a high spatial resolution of 15.4 lp/***,this work not only enriches the family of lead-free metal halides but also expands the application of manganese(II)-based halides in flexible X-ray scintillators.

关键词： manganese(II)-based metal halides Organic-inorganic hybrids Single crystals Flexible X-ray imaging