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Short-term Effects of Tillage Practices on Organic Carbon in Clay Loam Soil of Northeast china

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Pedosphere 2007年第5期17卷 619-623页

作者： LIAng Ai-Zhen ZHAng Xiao-Ping FAng Hua-Jun YAng Xue-Ming C. F. Drury Northeast Institute of geography and Agroecology Chinese Academy ofSciences Changchun 130012 （China） g.aduate school of the {2. academy of sciences Beijing 100049 （China） greenhouse ＆ Processing Crops Research Centre Agriculture ＆ Agri-Food Canada Harrow Ontario NOR 1GO （Canada）

A tillage experiment, consisting of moldboard plow （MP）, ridge tillage （RT）, and no-tillage （NT）, was performed in a randomized complete block design with four replicates to study the effect of 3-year tillage management on SOC content and its distribution in surface layer （30 cm） of a clay loam soil in northeast china. NT did not lead to significant increase of SOC in topsoil （0-5 cm） compared with MP and RT; however, the SOC content in NT soil was remarkably reduced at a depth of 5-2. cm. Accordingly, short-term （3-year） NT management tended to stratify SOC concentration, but not necessarily increase its storage in the plow layer for the soil.

关键词： clay loam soil moldboard plow no-tillage ridge tillage soil organic carbon

SiO_2.载磷钨杂多酸催化的甲苯与乙酸酐酰化反应

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燃料化学学报 2005年第5期33卷 622-625页

作者：胡拖平秦张峰王建国中国科学院山西煤炭化学研究所煤转化国家重点实验室

以SiO2.载12.磷钨酸(PW)为催化剂,对甲苯与乙酸酐(AA)的酰化反应进行了研究。采用XRD、BET、TgA和NH3-TPD等对PW/SiO2.化剂进行了表征。结果表明,PW负载量及焙烧温度对PW/SiO2.酸性、PW在SiO2.的分散状态以及酰化催化活性有明显的... 详细信息

以SiO2.载12.磷钨酸(PW)为催化剂,对甲苯与乙酸酐(AA)的酰化反应进行了研究。采用XRD、BET、TgA和NH3-TPD等对PW/SiO2.化剂进行了表征。结果表明,PW负载量及焙烧温度对PW/SiO2.酸性、PW在SiO2.的分散状态以及酰化催化活性有明显的影响。PW的负载量40%(按质量计)、焙烧温度300℃制备的PW(40%)/SiO2.化剂,其PW在载体表面的分散度好,酸量及酸强度适宜,对甲苯与乙酸酐的酰化反应具有较高的催化活性。在130℃,催化剂/乙酸酐(质量比)2.2.,催化反应效果最佳。

关键词：杂多酸 12.磷钨酸二氧化硅甲苯乙酸酐酰化反应

Copper naphthalocyanine-based hole-transport material for highperformance and thermally stable perovskite solar cells

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Science china Chemistry 2024年第8期67卷 2701-2709页

作者： Yue Qiang Huaiman Cao Yuzhen Pan Yi Chi Liangyu Zhao Yingguo Yang Hai-bei Li Yan gao Licheng Sun Ze Yu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsDalian University of Technology(DUT).Dalian 116024China school of Chemistry Dalian University of Technology(DUT)Dalian 116024China school of Microelectronics Fudan UniversityShanghai 200433China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research InstituteShanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China school of Ocean Shandong UniversityWeihai 264209China Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of ScienceWestlake UniversityHangzhou 310024China Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of Technology Stockholm 10044Sweden

Metal phthalocyanines(MPcs) have gained considerable research attention as hole-transport materials(HTMs) in perovskite solar cells(PSCs) because of their superb stability. However, the photovoltaic performance of MPc-based HTMs in PSCs is still lagging behind their small molecule and polymeric counterparts, largely due to their relatively low hole mobility. Here, we report for the first time the application of a copper naphthalocyanine derivative(namely t Bu-Cu Nc) as a hole-transport material(HTM)in perovskite solar cells(PSCs), and systematically study its optoelectronic and photovoltaic property compared with its Cu Pc analog(t Bu-Cu Pc). Combined experiments disclose that the extension of π-conjugation from Pc to Nc core leads to not only an enhanced hole-carrier mobility associated with a stronger intermolecular interaction, but also an elevated glass transition temperature(T_g) of 2.2.°C. The resultant PSCs employing t Bu-Cu Nc deliver an excellent power conversion efficiency of 2..03%, which is the record efficiency reported for metal complex-based HTMs in PSCs. More importantly, the encapsulated t Bu-Cu Nc-based devices also show dramatically improved thermal stability than the devices using the well-known SpiroOMe TAD, with a T_(80)lifetime for more than 1,000 h under damp-heat stress. This study unfolds a new avenue for developing efficient and stable HTMs in PSCs.

关键词： hole-transport materials perovskite solar cells copper naphthalocyanine extendedπ-conjugation thermal stability

Investigation of the effect of berberines alkaloids in Coptis chinensis Franch on Bacillus shigae growthby microcalorimetry

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Science china Chemistry 2007年第5期50卷 638-642页

作者： YAN Dan1,2.3, JIN Cheng1, XIAO XiaoHe1 & DOng XiaoPing2.1 Institute of chinese Medicine, 302.Hospital of People’s Liberation Army, beijing 100039,{2. 2.Chengdu University of Traditional chinese Medicine, Chengdu 610075,{2. 3 Chongqing Institute of Technology, Chongqing 400050,{2. Institute of chinese Medicine 302 Hospital of People’s Liberation Army Beijing China Chengdu University of Traditional chinese Medicine Chengdu China Chongqing Institute of Technology Chongqing China

The inhibitory effects of five berberines alkaloids (BAs) from rhizoma ofCoptis chinensis Franch,a traditional chinese medicinal (TCM) herb,on Bacillus shigae(***)growth were investigated by *** power-time curves of *** with and without BAswere acquired;meanwhile,the extent and duration of inhibitory effects on the metabolism wereevaluated by growth rate constants (k1,k2.,half inhibitory ratio (IC50),maximum heat output(P_(max)),and peak time (t_p).The values of k1 and k2.of a shigae in the presence of the five BAsdecreased with the increasing concentrations of ***,P_(max) was reduced,and the value oft_p increased with increasing concentrations of the five *** inhibitory activity varied withdifferent ***50 of the five BAs was respectively 75 mu g/mL for berberine,90 ng/mL forcoptisine,115 mu g/mL for palmatine,2.0 mu g/mL for epiberberine,and 400 mu g/mL *** sequence of antimicrobial activity of the five BAs:berberine > coptisine >palmatine > epiberberine > *** functional groups methylenedioxy at C2.and C3 on phenylring improve antimicrobial activity more strongly than methoxyl at C2.and C3 on ***,the effect of bacteriostasis is not significant with methylenedioxy or methoxyl at C9and C10 on phenyl ring.

关键词： berberines alkaloids, microcalorimetry, Bacillus shigae, inhibitory effect

OBSERVATION ON DEFECTS IN POLYCRYSTALLINE SILICON THIN FILMS

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 295-299页

作者： Y.F. Hu1), H. Shen2., L. Wang3), Z.C. Liang3), Z.Y. Liu1) and L.S. Wen1) 1) College of Mechanical Engineering, South china University of Technology, guan gzhou 510640, china 2. The {2. of Physics and Engineering, Zhongshan University, guangzhou 5102.5 , china 3) guangzhou Institute of Energy Conversion, The chinese academy of sciences, g uangzhou 510640, china College of Mechanical Engineering South China University of Technology Guangzhou 510640 China school of Physics and Engineering Zhongshan University Guangzhou 510275 China guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China

Polycrystalline silicon thin films were prepared by RTCVD (rapid thermal chemica l vapor deposition) method on several substrates such as SSP (silicon sheet from powder) ribbon, poly-Si wafer and mono-Si wafer. Intra-granular defects such as stacking faults, twins and microstructure defects were investigated on thin fil ms by scan electron microscopy (SEM) technique.

关键词： poly-Si thin film intra-granular defects surface cross-section

CFB煤燃烧/热解双反应器中热解室对立管内气固流动特性的影响

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燃料化学学报 2004年第6期32卷 711-716页

作者：王志锋梁鹏董众兵毕继诚中国科学院山西煤炭化学研究所煤转化国家重点实验室安徽理工大学化工系安徽淮南232001

考察了循环流化床煤燃烧热解双反应器系统中热解室的存在对立管内的压力分布及气固流动状况的影响。提升管的内径100mm、高6m,立管的内径44mm、高3m,热解室的截面积2.0mm×2.0mm、高770mm。结果表明,随着提升管内表观气速Ur的增加,有... 详细信息

考察了循环流化床煤燃烧热解双反应器系统中热解室的存在对立管内的压力分布及气固流动状况的影响。提升管的内径100mm、高6m,立管的内径44mm、高3m,热解室的截面积2.0mm×2.0mm、高770mm。结果表明,随着提升管内表观气速Ur的增加,有无热解室立管内均为负压差流动,负压差梯度随着Ur的增加而减小。有热解室时,热解室内要保持一定的料位高度,整个立管内固体颗粒的流动为负压差移动床流动;没有热解室时,立管内为稀相流动和移动床流动同时存在,立管内平衡料柱高度随Ur的增加而升高。随着循环量gs的增加,两种类型的立管内负压差梯度均随之增大,也存在着流动形态的差别。循环量gs的增加会引起立管内平衡料柱高度的降低。立管内气固相对滑移速度也随着循环量gs的增加而增大。

关键词：循环流化床CFBO 煤热解立管气固流动

氧化还原预处理对一氧化碳低温氧化Pd/CeO_2.iO_2.化剂性能的影响

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燃料化学学报 2004年第6期32卷 729-733页

作者：朱华青秦张峰王建国中国科学院山西煤炭化学研究所煤转化国家重点实验室

研究了氧化还原预处理对溶胶凝胶法制备的CeO2.TiO2.合氧化物负载Pd催化剂上CO低温氧化性能的影响,并对催化剂的稳定性进行了考察。H2.TPR结果表明,83℃的耗氢峰是PdO和载体中CeO2.同还原的结果,高温还原后Pd与载体之间相互作用加强... 详细信息

研究了氧化还原预处理对溶胶凝胶法制备的CeO2.TiO2.合氧化物负载Pd催化剂上CO低温氧化性能的影响,并对催化剂的稳定性进行了考察。H2.TPR结果表明,83℃的耗氢峰是PdO和载体中CeO2.同还原的结果,高温还原后Pd与载体之间相互作用加强。经高温氧化(500℃)低温还原(150℃)预处理的催化剂CO低温氧化活性最好,在反应气组成为0.5%CO+1.6%O2.6.0%N2.Ar,空速为30000mL·g-1·h-1,程序升温反应显示CO完全转化温度为48℃,这种预处理方式能够形成适宜的载体与金属间相互作用。稳定性实验在室温下进行,反应气组成为0.6%CO+14.7%O2.55.3%N2.Ar,Pd CeO2.TiO2.化剂具有较好的低温反应稳定性,100%CO转化率可持续12.。

关键词：一氧化碳低温氧化 Pd催化剂 CeO2.TiO2.合氧化物溶胶-凝胶

Nuciferine alleviates collagen-induced arthritic in rats by inhibiting the proliferation and invasion of human arthritis-derived fibroblast-like synoviocytes and rectifying Th17/Treg imbalance

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chinese Journal of Natural Medicines 2024年第4期22卷 341-355页

作者： WAng Hao gEng Xiaolong AI Fangbin YU Zhilun ZHAng Yan ZHAng beibei LV Cheng gAO Ruiyang YUE bei DOU Wei The MOE Key Laboratory of Standardization of chinese Medicines Shanghai Key Laboratory of Compound Chinese Medicinesand the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese MedicineInstitute of Chinese Materia MedicaSchool of Traditional Chinese Materia MedicaShanghai University of Traditional Chinese Medicine(SHUTCM)Shanghai 201203China

Rheumatoid arthritis(RA)is a chronic autoimmune disorder marked by persistent synovial inflammation and joint degradation,posing challenges in the development of effective ***,an alkaloid found in lotus leaf,has shown promising anti-inflammatory and anti-tumor effects,yet its efficacy in RA treatment remains *** study investigated the antiproliferative effects of nuciferine on the MH7A cell line,a human RA-derived fibroblast-like synoviocyte,revealing its ability to inhibit cell proliferation,promote apoptosis,induce apoptosis,and cause g1/S phase ***,nuciferine significantly reduced the migration and invasion capabilities of MH7A *** therapeutic potential of nuciferine was further evaluated in a collagen-induced arthritis(CIA)rat model,where it markedly alleviated joint swelling,synovial hyperplasia,cartilage injury,and inflammatory *** also improved collagen-induced bone erosion,decreased pro-inflammatory cytokines and serum immunoglobulins(Igg,Igg1,Igg2.),and restored the balance between T helper(Th)17 and regulatory T cells in the spleen of CIA *** results indicate that nuciferine may offer therapeutic advantages for RA by decreasing the proliferation and invasiveness of FLS cells and correcting the Th17/Treg cell imbalance in CIA rats.

关键词： Rheumatoid arthritis Collagen-induced arthritis Fibroblast-like synoviocyte Immune imbalance Nuciferine

Preparation and characterization of carbon nano-sheet powders

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Petroleum Science 2008年第1期5卷 79-82页

作者： Yang Wubao Zhao Zhen Fang Songhua Wang Yong Yang Size Lin Li school of Electromechanical Engineering China University of Petroleum Beijing 102249 China school of Chemical Science and Engineering China University of Petroleum Beijing 102249 China Institute of Physics Chinese Academy of Sciences Beijing 100080 China

Carbon nanosheet films were deposited on A1 substrates by using plasma assisted chemical vapor deposition （PACVD） technique. And after being peeled off from A1 substrates, carbon nanosheet powders （CNSPs） were obtained. In Raman spectrum of carbon film, there was a strong and broadened peak at about 1,580 cm^-1, indicating a carbon diamond-like film. Atomic force microscope image showed that the carbon diamond-like film had a grain size less than 100 nm, and its surface roughness Ra was 17.95 nm in an area of 5×5 μm^2. The CNSPs were irregular sheets with curly edges and a length of several micrometers to several hundreds of micrometers. The BET surface area of CNSPs was 6.66 m^2.g with no micro-pore present, which was confirmed by N2.adsorption-desorption characterization. In the adsorption testing, when the relative pressure p/po was higher than 0.3, the adsorption behavior did not follow the Langmuir equation. The addition of CNSPs to carbon black （catalyst support） could improve hydrodesulfurization performance of carbon supported Ni-W catalysts for diesel oil.

关键词： Plasma assisted chemical vapor deposition carbon nanosheet powder N2.adsorption/desorption hydrodesulfurization