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Low temperature conversion of methane to syngas using lattice oxygen over NiO-MgO

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Chinese Chemical Letters 2022年第10期33卷 4687-4690页

作者： Junbu Wang Zeai Huang ying Wang Jundao Wu Zhiqiang Rao fang Wang ying zhou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Institute of Carbon neutrality&School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China

The conversion of methane to syngas(H_(2) and CO)is an important route to produce high value-added *** methane into syngas in the absence of gaseous oxidants is an economical *** this work,NiO-MgO composite is successfully synthesized via an impregnation *** 764 K,methane is directly converted to syngas on the NiO-MgO without gaseous oxidants.A synergistic effect of NiO and MgO was observed,in which NiO induced lattice oxygen of MgO mobility to oxidize methane and suppressed the formation of intermediates for side *** a result,NiO-MgO exhibited enhancement of catalytic activity with the H2 production rate of 1241.0µmol g^(-1) min^(-1),which was 3.4 times higher than that of pure *** work provides a direct guidance to understand of methane oxidation via lattice oxygen under low temperature(<773 K).

关键词： Methane Lattice oxygen Syngas Hydrogen NiO

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阿片类药物诱导瘙痒的机制研究进展

中国药理学通报 2025年第1期41卷 29-34页

作者：马芳周培岚苏瑞斌军事医学研究院国家安全特需药品全国重点实验室北京100850 南京中医药大学药学院江苏南京210046

瘙痒是临床使用阿片类药物镇痛的患者普遍存在的严重不良反应之一。大量研究已经阐明阿片类药物的镇痛机制,但阿片类药物诱导瘙痒的机制尚不明确,瘙痒与镇痛之间的关系也模糊不清。目前的研究发现,阿片类药物作用于μ、κ及δ阿片受体后... 详细信息

瘙痒是临床使用阿片类药物镇痛的患者普遍存在的严重不良反应之一。大量研究已经阐明阿片类药物的镇痛机制,但阿片类药物诱导瘙痒的机制尚不明确,瘙痒与镇痛之间的关系也模糊不清。目前的研究发现,阿片类药物作用于μ、κ及δ阿片受体后,直接或间接影响瘙痒关键受体——胃泌素释放肽受体的功能,进而影响瘙痒信息传递。神经介素B、神经肽Y、B型利钠肽等神经肽,以及其他受体如瞬时受体电位香草素1受体、N-甲基-D-天冬氨酸受体、5-羟色胺受体等,在吗啡诱导的瘙痒中也具有重要作用。此外,阿片类药物所致瘙痒的预防和治疗也是围手术期吗啡镇痛的难点和热点之一。因此,明确瘙痒的具体发生机制,对寻找新的研究思路及预防和治疗阿片类药物诱导的瘙痒具有重要意义。

关键词：阿片类诱导的瘙痒瘙痒与镇痛瘙痒机制阿片受体胃泌素释放肽受体瘙痒治疗

Tintinnid community throughout the Bohai Sea during the spring

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Acta Oceanologica Sinica 2020年第6期39卷 65-71页

作者： ying Yu Feng zhou Wuchang Zhang Chen Wei Qunshan Wang Enjun fang Tianjin Fisheries Research Institute Tianjin 300457China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China

As one of the important microzooplankton in marine pelagic habitats,tintinnids are classified as neritic genera,oceanic genera and cosmopolitan *** now,we know little about the interaction between neritic and oceanic genera in continental *** species richness area was found in the mixing area between neritic and oceanic genera in the East China *** this study,we investigated the spatial distribution of tintinnid community throughout the entire Bohai Sea in May(spring)of 2014 to find out:(1)whether the tintinnid assembalges differed in the three major bays bordering this shallow inland sea;(2)whether there was low species richness area in the Bohai *** genera and 11 species attributed to neritic and cosmopolitan taxa were reported from this *** abundance averaged(81±216)ind./L(0–1234 ind./L).Tintinnid community differed within the three major bays,with each characterized by different tintinnid *** to the average abundance of three bays,tintinnids were most abundant in the Laizhou Bay((328±445)ind./L),and least abundant in the Liaodong Bay((34±57)ind./L).A low species richness area occurred in the central Bohai Sea(20–40 m isobaths),in some stations of which no tintinnid was *** study demonstrates that tintinnid community varied greatly over small spatial scales,and low species richness area was found in the mixing area between neritic and oceanic genera within this inland sea.

关键词： tintinnid community structure spatial distribution Bohai Sea spring

Novel additives for the separation of organic acids by ion-pair chromatography

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Chinese Chemical Letters 2010年第4期21卷 453-456页

作者： Zhong, ying ying zhou, Wen fang Hu, Zhen Zhen Chen, Mei Lan Zhu, Yan Zhejiang Univ Dept Chem Hangzhou 310028 Peoples R China Zhejiang Shuren Univ Biol & Environm Engn Coll Hangzhou 310015 Zhejiang Peoples R China

This paper proposes the use of novel surfactant additives for the separation of organic acids by ion-pair chromatography and studies the influences of surfactants on the chromatographic separation *** have been carried out on both silica gel matrix and polymer supporters in order to compare the two ordinary kinds of stationary phases,and the phenomenon is similar. Separation is based on differences in the stabilities of analyte-additive complexes in *** times of analytes can ...

关键词： Organic acids Ion-pair chromatography Surfactant Mobile phase additives

Trace analysis of anions in organic matrices by ion chromatography coupled with a novel reversed-phase column for on-line sample pretreatment

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Chinese Chemical Letters 2011年第4期22卷 461-464页

作者： ying ying Zhong Wen fang zhou Xue Ling Zeng Ming Li Ye Yan Zhu Department of Chemistry Zhejiang UniversityHangzhou 310028China Ningbo Entry-Exit Inspection and Quarantine Bureau Ningbo 315012China

An ion chromatography（IC） system coupled with on-line column-switching technique was used to determine anions ofμg/g levels in organic chemicals of analytical reagent grade.A novel polystyrene-divinylbenzene-carbon nanotube（PS-DVB-CNT） stationary phase was utilized for matrix elimination.A calibration study was conducted by preparing and analyzing eight concentrations（between 10 and 5000μg/L） of eight standards in deionized *** linearity was between 0.9978 and *** the detection limits ranged from 1.54μg/L to 10.02μg/L.A spiking study was performed on two representative organic *** recoveries were between 84.3%and 119.6%.

关键词： Ion chromatography Column switching Trace anions Organic matrix Polymer stationary phase

Numerical and experimental evaluation for density-related thermal insulation capability of entangled porous metallic wire material

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Defence Technology（防务技术） 2023年第5期23卷 177-188页

作者： Tao zhou Rong-zheng fang Di Jia Pei Yang Zhi-ying Ren Hong-bai Bai 92578 Troops of the Chinese People's Liberation Army Beijing100055PR China School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou350116PR China Institute of Metal Rubber&Vibration Noise Fuzhou UniversityFujianFuzhou350116PR China

Entangled porous metallic wire material(EPMWM)has the potential as a thermal insulation material in defence and *** order to optimize its thermophysical properties at the design stage,it is of great significance to reveal the thermal response mechanism of EPMWM based on its complex structural *** the present work,virtual manufacturing technology(VMT)was developed to restore the physics-based 3D model of *** this basis,the transient thermal analysis is carried out to explore the contact-relevant thermal behavior of EPMWM,and then the spiral unit containing unique structural information are further extracted and *** particular,the thermal resistance network is numerically constructed based on the spiral unit through the thermoelectric analogy method to accurately predict the effective thermal conductivity(ETC)of ***,the thermal diffusivity and specific heat of the samples were obtained by the laser thermal analyzer to calculate the ETC and thermal insulation factor of *** results show that the ETC of EPMWM increases with increasing temperature or reducing density under the experimental *** numerical prediction is consistent with the experimental result and the average error is less than 4%.

关键词： Entangled porous metallic wire material (EPMWM) Virtual manufacturing technology(VMT) Thermal resistance network Effective thermal conductivity(ETC) Thermal insulation factor

Influence of reaction parameters on the luminescence properties of monodisperse NaGd（1-x-y）（WO4）2:xEu3+,yTb3+ phosphor by molten salt synthesis

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Journal of Rare Earths 2018年第1期36卷 49-57页

作者： Weiqin Xiao Luqiao Yin Jipeng zhou fang Lei ying Shi Jianjun Xie Lei Zhang School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of Education (Shanghai University)

Eu3+activated and Eu3+, Tb3+co-activated monodisperse sodium double tungstates NaGd（WO4）2 phosphors were prepared by molten salt method at 750 ℃ for 10 h using NaCl as a flux. The crystal structure and morphology of the as-synthesized phosphors were measured by XRD and SEM, respectively. The photoluminescence properties were characterized by PL spectra, decay lifetime and CIE. The presence of NaCl plays an important role in the morphology and luminescence properties. In this work,NaCl and one of the raw material Na2CO3in a certain proportion will form a low eutectic salt to decrease the reaction temperature and benefit the formation of monodisperse NaGd（WO4）2crystals. The color of Eu3+and Tb3+co-doped NaGd（WO4）2phosphors can be tuned from creamy white to orange, red and green by adjusting the doping concentration of rare earth ions, since the emission contain the broad blue-green emission origin from NaGd（WO4）2host and characteristic red and green emission origin from Eu3+and Tb3+ions. The electroluminescent spectra and CIE measurement shows that the LED device with NaGd（1-x）（WO4）2:xEu3+（x = 0.24） phosphor can be excited by 365 nm and 380 nm LED chip, and their CIE coordinate is（x = 0.45, y = 0.45） and（x = 0.36, y = 0.37）, Ra is 80.3 and 86.3, Tcis 3196 and4556 K, respectively. As a single-component phosphor, NaGd（WO4）2:Eu3+,Tb3+have potential application in UV-pumped WLEDs.

关键词： NaGd(1-x-y)(WO4)2:xEu3+ yTb3+ Molten salt method Single component WLEDs White light

Bioleaching of two different types of chalcopyrite by Acidithiobacillus ferrooxidans

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International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 119-124页

作者： ying-bo Dong Hai Lin Kai-bin Fu Xiao-fang Xu Shan-shan zhou Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education) University of Science and Technology Beijing School of Civil and Environmental Engineering University of Science and Technology Beijing

Two different types of chalcopyrite （pyritic chalcopyrite and porphyry chalcopyrite） were bioleached with AcidithiobaciUus ferrooxidans ATF6. The bioleaching of the pyritic chalcopyrite and porphyry chalcopyrite is quite different. The copper extraction reaches 46.96% for the pyritic chalcopyrite after 48-d leaching, but it is only 14.50% for the porphyry chalcopyrite. Proper amounts of initial ferrous ions can improve the efficiency of copper extraction for the two different types of chalcopyrite. The optimum dosage of ferrous ions for the pyritic chalcopyrite and porphyry chalcopyrite is different. The adsorption of ATF6 on the pyritic chalcopyrite and porphyry chalcopyrite was also studied in this paper. It is found that ATF6 is selectively adsorbed by the two different types of chalcopyrite; the higher adsorption onto the pyritic chalcopyrite than the porphyry chalcopyrite leads to the higher copper dissolution rate of the pyritic chalcopyrite. In addition, the zeta-potential of chalcopyrite before and after bioleaching further confirms that ATF6 is more easily adsorbed onto the pyritic chalcopyrite.

关键词： chalcopyrite bioleaching adsorption functional groups

The abundance of massive compact galaxies at 1.0

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Research in Astronomy and Astrophysics 2019年第10期19卷 109-120页

作者： Shi-ying Lu Yi-zhou Gu Guan-Wen fang Qi-Rong Yuan Department of Physics and Institute of Theoretical Physics Nanjing Normal University Nanjing 210023 China Institute for Astronomy and History of Science and Technology Dali UniversityDali 671003 China

Based on a large sample of massive(M* 1010 M⊙) compact galaxies at 1.0 < z < 3.0 in five 3 D-HST/CANDELS fields, we quantify the fractional abundance and comoving number density of massive compact galaxies as a function of redshift. The samples of compact quiescent galaxies(cQGs) and compact star-forming galaxies(cSFGs) are constructed by various selection criteria of compact galaxies in the literature, and the effect of compactness definition on abundance estimate has proven to be remarkable,particularly for the cQGs and cSFGs at high redshifts. Regardless of the compactness criteria adopted,their overall redshift evolutions of fractional abundance and number density are found to be rather *** samples of the cQGs exhibit a sustained increase in number density from z ~ 3 to 2 and a plateau at 1 < z < 2. For massive cSFGs, a plateau in the number density at 2 < z < 3 can be found, as well as a continuous drop from z ~ 2 to 1. The evolutionary trends of the cQG and cSFG abundances support the scenario that the cSFGs at z≥ 2 may have been rapidly quenched into quiescent phase via violent dissipational processes, such as major merger and disk instabilities. The rarity of the cSFGs at lower redshifts(z < 1) can be interpreted by the decrease of gas reservoirs in dark matter halos and the consequent low efficiency of gas-rich dissipation.

关键词： galaxies high-redshift-galaxies massive-compact-galaxies evolution-galaxies