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The evolution of coal, examining the transitions from anthracite to natural graphite: a spectroscopy and optical microscopy evaluation

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Frontiers of Earth Science 2023年第1期17卷 87-99页

作者： Liang YUAN qinfu liu Kuo LI Ying QUAN Xiaoguang LI Jonathan P.MATHEWS School of Geosciences and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China The EMS Energy Institute and the Leone Family Department of Energy and Mineral EngineeringPennsylvania State UniversityUniversity Park PA 16802USA

Coal-derived natural graphite(CDNG)has multiple industrial ***,ten metamorphic coals from anthracite to CDNG were obtained from Lutang and Xinhua in the Hunan Province and Panshi in the Jilin *** characterization(proximate and ultimate analyses,X-Ray powder diffraction(XRD),and powder Raman spectroscopy),along with optical microscopy,scanning electron microscope(SEM)and micro-Raman spectroscopy were utilized to examine the transitions from anthracite to semi-graphite to *** XRD and Raman spectroscopy data indicate that from anthracite to highly ordered graphite the average crystal diameter(La)and height(Lc)increased from 6.1 and 4.6 nm to 34.8 and 27.5 nm,*** crystalline parameters of the CDNG samples from Panshi and Lutang varied slightly when closer to the intrusive *** microscopy and SEM indicated that in the anthracite samples there were thermoplastic vitrinite,devolatilized vitrinite,and some“normal”*** the meta-anthracite,pyrolytic carbon,mosaic structure,and crystalline tar were *** the CDNG there were flake graphite,crystalline aggregates,and matrix *** crystalline aggregates show the highest structural ordering degree as determined from Raman spectral parameters(full-width at half maxima(G-FWHM)~20 cm^(−1),D1/(D1+D2+G)area ratio(R2)value<0.5).The flake graphite is less ordered with G-FWHM~28 cm^(−1) and 0.5

关键词： micro-Raman spectroscopy structural ordering evolution coal-derived natural graphite XRD anthracite

基于2012—2021年英文文献计量学的森林幼苗更新研究进展分析

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山地农业生物学报 2024年第4期43卷 23-30页

作者：阎玺羽张广奇臧丽鹏刘庆福陈丹梅隋明浈贵州大学林学院/森林生态研究中心贵州贵阳550025 贵州荔波喀斯特森林生态系统国家定位观测研究站贵州荔波558400

森林更新是维持森林群落结构稳定的重要生态学过程。幼苗更新是森林更新方式之一,也是林木生长过程中极为重要的阶段,是森林群落演替的关键环节,了解木本植物幼苗更新研究进展有助于理解森林群落的更新与演替机制。本文对2012—2021年We... 详细信息

森林更新是维持森林群落结构稳定的重要生态学过程。幼苗更新是森林更新方式之一,也是林木生长过程中极为重要的阶段,是森林群落演替的关键环节,了解木本植物幼苗更新研究进展有助于理解森林群落的更新与演替机制。本文对2012—2021年Web of Science核心合集数据库3598篇文献进行了可视化分析。通过构建科学知识图谱,梳理出森林幼苗更新研究文献的变化、作者与机构的合作关系以及热点关键词。研究结果从收录论文的角度,定量、客观地描述了2012—2021年森林幼苗更新的研究状况及研究热点,直观地反映森林幼苗更新研究中网络、结构、交叉等知识群之间的复杂关系,阐明了森林幼苗研究的现状和发展趋势,为促进木本植物幼苗更新深入研究及相关领域学者凝练研究动向和科学问题等提供参考信息。

关键词：天然更新 CiteSpace 生态恢复幼苗

Geochemical characteristics of illite clay rocks from the Shihezi Formation in the Hanxing mining area and its sedimentary environment

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Mining Science and Technology 2011年第4期21卷 495-500页

作者： Xu Bohui Ding Shuli Wang Yu liu qinfu Key laboratory of Resource Survey and Research of Hebei Province Hebei University of Engineering Handan 056038 China School of Geological Sciences China University of Mining ＆ Technology Beijing 100083 China

We studied the geochemical characteristics of illite clay rocks and their importance from the Shihezi Formation of Late Permian in the Hanxing mining area by means of ICP-MS and sequential X-ray fluorescence *** results show that the amount of SiO2 is between 53.37% and 61.58%(byweight) and that of Al2O3 22.40% and 31.31%(by weight).The ratio of SiO2/Al2O3 lies between 1.71and *** amount of K2O ranges from 1.11% to 2.56%(by weight).The amounts of Fe and Ti are higherthan the theoretical values in illite clay rock would *** amounts of some trace elements,such asGa,As,Ba,Cu,Th and U are higher than their Clark values,while that of another 23 trace elements arefound to be close to their Clark *** amounts of REE range from 22.59 to 570.54 lg/g,with an aver-age of 163.23 lg/*** ratios of LREE/HREE range from 5.41 to 21.82,with an average of *** char-acteristics show that LREE are much richer in content than *** REE distribution patterns of oursamples were characterized by clearly negative Ce and Eu *** analyzed the sedimentary environment of the Hanxing mining area in Late Permian by the characteristic element ratio *** of Mn/Fe range from 0 to 0.0168,which are lower than those in a marine sedimentary *** ratios of Sr/Ba(0.20-0.41) are less than *** are all indications that the sediments of the Hanxingmining area in Late Permian form largely a continental sedimentary *** sedimentary wateris freshwater,a conclusion reached on the basis of the ratios of Th/U(2.66-6.62) and of Ca/(Ca + Fe)(0.01-0.059);the average ratio of Fe2+/Fe3+ is *** sedimentary water condition is weakly acidicand weakly oxidative-weakly reductive,a conclusion reached on the basis of ratios of Fe2+/Fe3+(4.8)and of Ceanom(0.08).

关键词：地球化学特征沉积环境采矿区粘土岩伊利石石河子 X射线荧光光谱法元素比值法

Author correction to“Immune-awakening Saccharomyces-inspired nanocarrier for oral target delivery to lymph and tumors”[Acta Pharmaceutica Sinica B 12(2022)4501-4518]

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1478-1482页

作者： Yuling Mao Xiudan Wang Caishun Chen qinfu Zhao Yanfeng liu Jinghai Zhang Siling Wang Department of Pharmaceutics School of PharmacyShenyang Pharmaceutical University103 Wenhua RoadShenyang110016China Department of Biomedical Engineering School of Medical DevicesShenyang Pharmaceutical University103 Wenhua RoadShenyang110016China School of Life Science and Bio-pharmaceutics Shenyang Pharmaceutical University103 Wenhua RoadShenyang110016China

The authors regret that there is an error in the article Fig.9D1 due to the mistake of copying and pasting in the process of assembling figures and negligence in the proofreading,and also a mislabled error in the supp... 详细信息

关键词： correction supporting proof

Genesis of Kaolinite Deposits in the Jungar Coalfield,North China:Petrological,Mineralogical and Geochemical Evidence

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Acta Geologica Sinica(English Edition) 2021年第2期95卷 517-530页

作者： liu Linsong ZHANG Tongjun liu Jianping liu qinfu LI Kuo liu Di liu Wanyue College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China Shanxi Province Coal Geology 115 Prospecting Institute DatongShanxi 037000China

Petrological,mineralogical and geochemical studies carried out on kaolinite deposits in Haerwusu surface mine,Jungar Coalfield,northern Ordos Basin,North China,define their characteristics,ore genesis and economic *** on the crystalline size,two different types of kaolinite rocks,cryptocrystalline and grainy,were identified under the *** data show that kaolinite is the predominant mineral,associated with boehmite,magnesite,anatase,pyrite,diaspore and ***,high boehmite content(mean 70%)shows up in the middle *** minerals present homogeneous shape and a good crystallinity(HI=0.96–1.26).Geochemical studies show that the SiO_(2)/Al_(2)O_(3)molar ratio of kaolinite is close to the theoretical value,and the contents of Na_(2)O,K_(2)O,CaO,Mg O are less,suggesting a strong chemical weathering *** REE and Eu anomalies show a close relationship between kaolinite and the Yinshan Oldland granite.A Ce anomaly reflects a continental sedimentary environment with shallow water.A temperature range of 26.7–34℃was calculated on the basis of the isotopic signatures(δ18O,δD)of the kaolinite *** these data indicate that the formation of the kaolinite is caused mainly by the dissolution,coagulation,precipitation and recrystallization of aluminosilicate clastics in acidic *** formation of boehmite in the middle layers indicates that the source rocks have *** is mainly formed by dehydration and compaction of an aluminum-rich colloid which transported into peat swamp during *** addition,it formed by desiliconization of kaolinite under acidic *** to its high kaolinite content(up to 90%)and low iron mineral content(less than 1%),and good crystallinity,kaolinite deposits occurred at Haerwusu surface mine probably have great economical value in the future.

关键词： Kaolinite genesis Carboniferous-Permian Haerwusu Inner Mongolia Autonomous Region

Influence of order degree of coaly graphite on its structure change during preparation of graphene oxide

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Journal of Materiomics 2020年第3期6卷 628-641页

作者： Dandan Hou Kuo Li Rujia Ma qinfu liu School of Electronics Engineering and Computer Science Peking UniversityBeijing100871China School of Geoscience and Surveying Engineering China University of Mining&TechnologyBeijing 100083China

Coaly graphite is an important natural graphite resource that derived from coal under a natural process that associated with igneous *** graphite is usually used for the chemical synthesis of graphene oxide(GO),the main precursor for preparation of graphene,but few papers pay attention to preparing GO using coaly *** this paper,four kinds of natural coaly graphite with different graphitization degrees were exposed to a modified Hummer’s oxidation method to prepare *** flake graphite sample was also used for *** results showed that the structural change process from graphite to GO were significantly affected by the graphitization degree of the original coaly *** relationship between yields of GO and graphitization degrees of the coaly graphite was *** mechanism of why the graphite with low graphitization degrees cannot be totally oxidized was *** graphite with a graphitization degree of higher than 80% was easier to be oxidized and yielded the same amount of GO as the flake graphite did,suggesting it is the potential substitute for the flake graphite to produce GO in bulk quantities.

关键词： Coaly graphite Graphitization degree Graphene oxide Structure change

Facile synthesis of graphene via reduction of graphene oxide by artemisinin in ethanol

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Journal of Materiomics 2018年第3期4卷 256-265页

作者： Dandan Hou qinfu liu Xianshuai Wang Ying Quan Zhichuan Qiao Li Yu Shuli Ding School of Geoscience and Surveying Engineering China University of Mining&TechnologyBeijing 100083China Key Laboratory of Resource Survey and Research of Hebei Province Hebei University of EngineeringHandan 056038China

The preparation of reduced graphene oxide(RGO)by chemical reduction of graphene oxide(GO)usually involves highly toxic reducing agents which are harmful to the environment and human *** this paper,a mediated facile and relative green approach for the preparation of RGO in ethanol using artemisinin as a reducing agent is reported for the first *** morphology and de-oxidation efficiency of the obtained RGO were characterized by transmission electron microscope(TEM),atomic force microscope(AFM),and X-ray photoelectron spectroscopy(XPS).The results showed that artemisinin can effectively reduce GO into few-layered RGO with a high carbon to oxygen ratio(11.7).The mechanism for elimination of oxygen-containing functional groups decorated on GO nanosheets by artemisinin was *** important features of relatively environmentally friendly and facile operation procedures endow this approach with great promise in the mass production of RGO and various graphene-based materials,especially for biomaterials.

关键词： Nanostructures Green reduction Graphene oxide Artemisinin

Effectiveness and safety of combined nimotuzumab and S-1 chemotherapy with concurrent radiotherapy for locally advanced esophageal cancer in malnourished and elderly patients:A prospective phaseⅡstudy

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Chinese Journal of Cancer Research 2024年第3期36卷 270-281页

作者： Guojie Feng Jiao Li Nuo Yu Ziyu Zheng Xiongtao Yang Lei Deng Tao Zhang Wenqing Wang Wenyang liu Jianyang Wang qinfu Feng Jima Lyu Zefen Xiao Zongmei Zhou Nan Bi Jianjun Qin Xin Wang Department of Radiation Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100021China Department of Thoracic Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100021China

Objective:Definitive chemoradiotherapy(dCRT)is the standard treatment for unresectable locally advanced esophageal ***,this treatment is associated with substantial toxicity,and most malnourished or elderly patients are unable to complete this ***,there is a need for a more suitable radiotherapy combination regimen for this *** study was aimed to evaluate the efficacy and safety of a combination regimen comprising chemotherapy with nimotuzumab and S-1 and concurrent radiotherapy for patients with fragile locally advanced esophageal cancer with a high Nutritional Risk Screening 2002(NRS-2002)***:Eligible patients with unresectable esophageal carcinoma who had an NRS-2002 score of 2 or higher were *** were treated with S-1 and nimotuzumab with concurrent radiotherapy,followed by surgery or definitive *** primary endpoint was the locoregional control(LRC)***:A total of 55 patients who met the study criteria were *** completion of treatment,surgery was performed in 15 patients and radiotherapy was continued in 40 *** median follow-up period was 33.3[95%confidence interval(95%CI,31.4−35.1)]*** LRC rate was 77.2%(95%CI,66.6%−89.4%)at 1 year in the entire *** overall survival(OS)rate and event-free survival(EFS)rate were 57.5%and 51.5%at 3 years,*** was associated with better LRC[hazard ratio(HR)=0.16;95%CI,0.04−0.70;P=0.015],OS(HR=0.19;95%CI,0.04−0.80;P=0.024),and EFS(HR=0.25;95%CI,0.08−0.75;P=0.013).Most adverse events were of grade 1 or 2,and no severe adverse events ***:For malnourished or elderly patients with locally advanced esophageal cancer,radiotherapy combined with nimotuzumab and S-1 is effective and has a good safety profile.

关键词： Esophageal carcinoma squamous cell carcinoma nutritional risk score nimotuzumab S-1 definitive chemoradiotherapy

The Factors on Removal of Zinc Cation from Aqueous Solution by Bentonite

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Natural Resources 2011年第2期2卷 107-113页

作者： Shuli Ding Juanjuan Shen Bohui Xu qinfu liu Yuzhuang Sun 不详

The removing zinc cation from aqueous solution by Ca-bentonite and Na-exchanged bentonite was studied. The factors such as the initial concentration of Zn2+, the liquid-to-solid ratio, pH, adsorption time, stirring speed, coexisting ions, temperature and bentonite particle size were investigated. The results show that the adsorption process of bentonite accorded with the Freundlich isotherm model, the removal of Zn2+ by Ca-bentonite and Na-exchanged bentonite reached equilibrium in 2 h, and adsorption of Na- bentonite was superior to Ca-bentonite. The adsorption rate of zinc increased with increasing pH, temperature, stirring speed, time span and with decreasing bentonite particle, the initial concentration of Zn2+ and the liquid-to-solid ratio. In mixed solution which contains Pb2+and Cr6+, Pb2+ has no influ- ence on the removal of Zn2+ by both the bentonites while Cr6+can decease it.

关键词： Bentonite Zn2+ Adsorption