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In situ XRD and electrochemical investigation on a new intercalation-type anode for high-rate lithium ion capacitor

Journal of Energy Chemistry 2021年第6期30卷 109-117,I0004页

作者： Bobo Zou Ting Wang Shengyuan Li Rong Kang guochun Li Sherif ael-Khodary Dickon HLNg Xianhu Liu Jingxia Qiu Yan Zhao Jiabiao Lian Huaming Li Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina Nanyang Environment and Water Research Institute(NEWRI) Interdisciplinary Graduate School(IGS)Nanyang Technological University50 Nanyang Avenue639798Singapore Department of Physics The Chinese University of Hong KongShatinHong KongChina Key Laboratory of Materials Processing&Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002HenanChina

A new intercalation-type anode material is reported herein to improve the lithium storage kinetics for high-rate lithium ion *** crystal structure of orthorhombic NaNbO3 indicates two possible tunnels for lithium ions insertion into NaNbO3 host along theand***,in situ XRD is conducted to investigate the lithium storage mechanism and structural evolution of the NaNb O_(3) anode,demonstrating its intercalation behavior through(101)and(141)***,the rgO nanosheets are introduced to facilitate the charge transfer,which also effectively prevent the aggregation of NaNbO3 *** expected,the NaNbO_(3)/rgO nanocomposites possess remarkable reversible capacity(465 mA h g^(-1) at 0.1 A g^(-1)),superior rate capability(325 mA h g^(-1) at 1.0 A g^(-1))and cycling stability,attributed to their synergistic effect and high Li+diffusion coefficient DLi[D(NaNbO_(3)/rgO)/D(NaNbO_(3))≈31.54].Remarkably,the NaNbO3/rgO-based LIC delivers a high energy density of 166.7 W h kg^(-1) at 112.4 W kg^(-1) and remains 24.1 W h kg^(-1) at an ultrahigh power density of26621.2 W kg^(-1),with an outstanding cycling durability(90%retention over 3000 cycles at 1.0 A g^(-1)).This study provides new insights on novel intercalation-type anode material to enrich the materials system of LICs.

关键词： Lithium ion capacitor Intercalation-type anode NaNbO3 nanocubes In situ XRD High energy/power densities

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新石器时代河姆渡人与半坡人居址选择比较研究

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陕西师范大学学报(哲学社会科学版) 2000年第4期 97-102页

作者：张维慎陕西师范大学西北历史环境变迁与经济社会发展研究中心!陕西西安710062

河姆渡文化是长江下游地区的典型文化，而半坡文化则是黄河流域仰韶文化的一个典型代表，它们同属于新石器时代中期。新石器时代的河姆渡人虽已发明了木构浅水井，但他们并没有加以推广，因而他们选择居址时与半坡人不约而同地都在河流... 详细信息

河姆渡文化是长江下游地区的典型文化，而半坡文化则是黄河流域仰韶文化的一个典型代表，它们同属于新石器时代中期。新石器时代的河姆渡人虽已发明了木构浅水井，但他们并没有加以推广，因而他们选择居址时与半坡人不约而同地都在河流(或湖、沼)的附近。这样的选址：一是便于人和牲畜的饮水；二是便于发展原始农业；三是便于发展原始渔猎经济；四是便于原始人交通往来。

关键词：新石器时代河姆渡人半坡文化

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Chemical composition and antifungal potential of apricot,sour cherry,and cherry tree bio-products(resins)against food-borne molds

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Food Bioscience 2022年第3期47卷 240-244页

作者： Oktay Tomar gökhan Akarca Veli gök Ömer İstek Kocaeli University Faculty of AgricultureArslanbey Campus41285KocaeliTurkey Afyon Kocatepe University Faculty of EngineeringDepartment of Food Engineering03200AfyonkarahisarTurkey Ahmet İpek Meat Co Organized Industrial Zone1st StreetAfyonkarahisar03200Turkey

In this study,the chemical components of ethanol extracts from the resins of apricot(Prunus armeniaca L.),sour cherry(Prunus cerasus L.)and cherry(Prunus avium L.)trees were *** extracts'antifungal activity,minimal inhibitory concentration(mic)and minimum fungicidal concentration(MFC)values were determined on seven different food-borne mold *** was the most abundant phenolic compound in Prunus cerasus and Prunus avium resin extracts,while chlorogenic acid had the highest concentration in Prunus armeniaca resin *** highest antifungal activity and the lowest mic and MFC values were in the sour cherry tree resin's ethanol extracts(Pghest antifungal activity was in the sour cherry tree resin's ethanol extract with a 19.24 mm zone diameter on Aspergillus *** contrast,the lowest effect was on Cladosporium cladosporioides with an 8.00 mm zone diameter in apricot tree resin's ethanol extracts(Pmic and MFC values were recorded using the sour cherry tree resin's ethanol extracts on Rhizopus nigricans(16.6μg/mL)and Aspergillus flavus(47.3μg/mL)***,apricot,sour cherry,and cherry tree resins extracts can be used as natural antifungals against molds.

关键词： Prunus Resin Ethanol extract Naringenin Aspergillus flavus Antifungal

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Antitubercular activity of the semi-polar extractives of Uvaria rufa

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Asian Pacific Journal of Tropical Medicine 2012年第10期5卷 777-780页

作者： Allan Patrick g Macabeo Florie A Tudla Karsten Krohn Scott g Franzblau Organic Synthesis and Phytochemistry Laboratory Research Center for the Natural SciencesUniversity of Santo TomasEspana Blvd.Manila 1015Philippines Institut fr Organische Chemie Universitat RegensburgUniversitatsstrasse 3193053 RegensburgGermany Institut fr Organische Chemie Universitat PaderbornGermany Institute for Tuberculosis Research College of PharmacyUniversity of Illinois.IL 60085USA

Objective:To investigate the inhibitory activity of the chloroform extract,petroleum ether and chloroform sub-extracts,lead-acetate treated chloroform extract,fractions and secondary metabolites of Uvaria rufa(***) against Mycobacterium tuberculosis(***) H_(37)Rv. Methods:The antituberculosis susceptibility assay was earried out using the colorimetric microplate Alamar blue assay(MABA).In addition,the cytotoxicity of the most active fraction was evaluated using the VERO cell toxicity ***:The in vitro inhibitory activity against *** H_(37)Rv increased as purification progressed to fractionation(mic up to 23μg/mL). The chloroform extract and its sub-extracts showed moderate toxicity while the most active fraction from chloroform sub-extract exhibited no cytotoxicity against VERO ***, the lead acetate-treated crude chloroform extract and its fractions showed complete inhibitions (100%) with mic values up to 8μg/*** screening of the most active fraction showed,in general,the presence of terpenoids,steroids and phenolic *** of the antimycobacterial activity of known secondary metabolites isolated showed no promising inhibitory activity against the test ***:The present results demonstrate the potential of *** as a phytomedicinal source of compounds that may exhibit promising antituberculosis *** addition,elimination of polar pigments revealed enhanced inhibition against *** H_(37)*** several compounds known for this plant did not show antimycobacterial activity,the obtained results are considered sufficient reason for further study to isolate the metabolites from *** responsible for the antitubercular activity.

关键词： Uvaria rufa Antitubercular Mycobacterium tuberculosis H_(37)Rv

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Preliminary phytochemical analysis,antibacterial,antifungal and anticandidal activities of successive extracts of Crossandra infundibuliformis

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Asian Pacific Journal of Tropical Medicine 2011年第3期4卷 192-195页

作者： Madhumitha g A.Mary Saral Pharmaceutical Chemistry Division School of Advanced SciencesVIT UniversityVellore-632 014Tamil NaduIndia

Objective:To investigate the phytochemical,antibacterial,antifungal and anticandidal activity of successive extracts of Crossandra infundibuliformis(Acanthaceae) ***:Preliminary screening on the presence of alkaloids,saponins,phytosterols,phenolic compounds,flavanoids, tannins,carbohydrates,terpenoids,oils and fats were carried out by phytochemical *** antibacterial,antifungal and anticandidal activities were done by agar well diffusion technique. Results:The successive extracts have an array of chemical constituents and the mic values of antibacterial activity ranges from 0.007 8 to 0.015 0μg/*** case of antifungal and anticandidal activities the mic values were between 0.125 and 0.250μg/***:These findings demonstrate that the leaf extracts of *** presents excellent antimicrobial activities and thus have great potential as a source for natural health care products.

关键词： Acanthaceae Antimicrobial Crossandra infundibuliformis

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The Fourier space restricted Hartree-Fock method for the electronic structure calculation of linear poly(tetrafluoroethylene)

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Science China Chemistry 2014年第10期57卷 1355-1362页

作者： FRIPIAT Joseph g. HARRIS Frank E. Laboratoire de Chimie Théorique Unité de chimie physique théorique et structurale University of NamurRue de Bruxelles Department of Physics University of Utah Quantum Theory Project University of Florida

Building on the pioneering work of Jean-Marie Andre and working in the laboratory he founded, the authors have developed a code called FT-1D to make Hartree-Fock electronic structure computations for stereoregular polymers using Ewald-type con- vergence acceleration methods. That code also takes full advantage of all line-group symmetries to calculate only the minimal set of two-electron integrals and to optimize the computation of the Fock matrix. The present communication reports a bench- mark study of the FT-1D code using polytetrafluoroethylene （PTFE） as a test case. Our results not only confirm the algorith- mic correctness of the code through agreement with other studies where they are applicable, but also show that the use of con- vergence acceleration enables accurate results to be obtained in situations where other widely-used codes （e.g., PLH and Crys- tal） fail. It is also found that full attention to the line-group symmetry of the PTFE polymer leads to an increase of between one and two orders of magnitude in the speed of computation. The new code can therefore be viewed as extending the range of electronic-structure computations for stereoregular polymers beyond the present scope of the successful and valuable code Crystal.

关键词： poly(tetrafluoroethylene) band structure Fourier-space Hartree-Fock lattice sum Ewaid

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Ocular flora in patients undergoing intravitreal injections: antibiotic resistance patterns and susceptibility to antiseptic picloxydine

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International Journal of Ophthalmology(English edition) 2020年第1期13卷 85-92页

作者： Maria V.Budzinskaya Anait S.Khalatyan Marina g.Strakhovskaya Vladimir g.Zhukhovitsky Scientific Research Institute of Eye Diseases Moscow 119021Russia Department of Biology Lomonosov Moscow State UniversityMoscow 119234Russia Federal Research and Clinical Center of Specialized Medical Care and Medical Technologies Federal Medical and Biological Agency of RussiaMoscow 115682Russia gamaleya National Research Centre for Epidemiology and microbiology Moscow 123098Russia

AIM: To study antibiotic resistance patterns and susceptibility to eye antiseptic picloxydine of conjunctival flora in patients undergoing intravitreal injections(IVIs).METHODS: Conjunctival swabs were taken in 4 groups of patients, 20 patients in each group(n=80): without IVIs and ophthalmic operations in history(group N1;control group);with the first IVI and antibiotic eye drops Tobrex applied 3 d before IVI and 5 d after it(group N2);with 20 or more IVIs and repeated courses of antibiotic eye drops(group N3);with the first IVI and antiseptic eye drops Vitabact(picloxydine) applied 3 d before IVI and 5 d after it(group N4). In groups N2 and N4 swabs were taken at baseline and after the treatment. Efficacy of picloxydine in inhibition of growth of conjunctival isolates susceptible and resistant to antibiotic was studied in vitro. Minimal inhibition concentrations(mic) were determined with microdilution ***: Two of the three patients who had to undergo the IVI procedure showed conjunctiva bacterial contamination. Along with few Staphylococcus aureus and gram-negative isolates susceptible to most antibiotics, the majority(71%-77%) of causative agents were coagulase-negative Staphylococci(Co NS), 40%-50% of which were multidrug resistant(MDR). Eye disinfection in the operating room and peri-injection courses of Tobrex or Vitabact resulted in total elimination of isolates found at baseline. However, in 10% and 20% of patients, respectively, recolonization of the conjunctiva with differing strains occurred. In patients with repeated IVI and Tobrex/Maxitrol treatment, the conjunctival flora showed high resistance rates: 90% of Co NS were MDR. In the in vitro study, picloxydine showed bactericidal effect against Staphylococci isolates both antibiotic resistant and susceptible with mic≥13.56 μg/m L. Incubation of bacteria for 15 min in Vitabact eye drops, commercially available form of picloxydine, 434 μg/m L, showed total loss of colony forming units of all teste

关键词： intravitreal injections conjunctival isolates antibiotic resistance picloxydine Vitabact

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内电场对纳米硅光致发光谱的影响

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物理学报 2004年第4期53卷 1236-1242页

作者：黄凯王思慧施毅秦国毅张荣郑有炓南京大学物理系固体微结构国家重点实验室南京210093

从量子限制发光中心模型出发 ,计算了纳米硅的光致发光 (PL)特征与发光中心间的关系 .研究发现 ,纳米硅与发光中心间的内电场对载流子复合率及峰位振荡有着十分重要的影响 .在 2— 5nm的尺寸范围内 ,纳米硅发光中心上的载流子复合概率... 详细信息

从量子限制发光中心模型出发 ,计算了纳米硅的光致发光 (PL)特征与发光中心间的关系 .研究发现 ,纳米硅与发光中心间的内电场对载流子复合率及峰位振荡有着十分重要的影响 .在 2— 5nm的尺寸范围内 ,纳米硅发光中心上的载流子复合概率远大于内部复合概率 ,仅需考虑发光中心上的载流子复合发光 .还发现发光中心与纳米硅粒子间的内电场对于纳米硅的发光峰位振荡有着显著的影响 .发光中心与纳米硅粒子间的内电场的存在会显著减小纳米硅粒子的内部发光效率以及外部相应发光中心上的发光强度。

关键词：内电场纳米硅光致发光谱量子限制发光中心载流子复合率发光强度

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Influence of Water Pollution on mic of Stainless Steel 304L

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Journal of Iron and Steel Research International 2002年第2期9卷 45-48页

作者： LINg Yun CHEN Z g gUEMPL P KAESSER M Jiangsu University of Science and Technology Zhenjiang 212013 China Jiangsu University of Science and Technology Zhenjiang 212013 China Industrial University of Konstance Konstance Germany Industrial University of Konstance Konstance Germany

Crystallization kinetics of Pr 8Fe 86 x Zr x B 6 ( x =0, 1, 2) amorphous alloys was studied by DTA and XRD methods. The experimental results showed that the crystalline phases of Pr 8Fe 86 B 6 alloy are composed of α Fe phase, Pr 2Fe 23 B 3 and Pr 2Fe 14 B, when crystallization temperature is below 900 ℃. The activation energy of α Fe phase remains relatively constant about 306.09 kJ/mol, as the crystalline fraction of α Fe phase is below 8 %. At the beginning of crystallization, the activation energy of Pr 2Fe 23 B 3 and Pr 2Fe 14 B phases are 510.85 kJ/mol and 725.97 kJ/mol, respectively, and then the activation energy of three phases declines with increasing the crystalline fraction. The crystallization behavior of α Fe and Pr 2Fe 14 B essentially results in the formation of a α Fe/Pr 2Fe 14 B composite microstructure with a coarse grain size in annealed Pr 8Fe 86 B 6 alloy, which is attributed to a difficult nucleation and an easy growth for both the α Fe and Pr 2Fe 14 B in the alloy. Zr can be used to change the crystallization behavior of the α Fe phase in Pr Fe B amorphous alloy, which is helpful to the formation of the α Fe/Pr 2Fe 14 B nanocomposite microstructure with a fine grain size for the α Fe phase in the alloy.

关键词： Pr 8Fe86-x Zr xB 6 amorphous alloy crystallization kinetics activation energy

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Synthesis and in vitro antimicrobial activity of N-arylquinoline derivatives bearing 2-morpholinoquinoline moiety

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Chinese Chemical Letters 2012年第4期23卷 427-430页

作者： Jigar A.Makawana Manish P.Patel Ranjan g.Patel Department of Chemistry Sardar Patel UniversityVallabh Vidyanagar 388120GujaratIndia

A new series of N-arylquinoline derivatives 5a-x bearing 2-morpholinoquinoline moiety has been synthesized by one pot base catalyzed cyclocondensation reaction of 2-morpholinoquinoline-3-carbaldehydes 2a-c,malononitrile 3 andβ-enaminones 4a-h. All the synthesized compounds were screened for their in vitro antimicrobial activity against six bacterial pathogens,namely Streptococcus pneumoniae,Clostridium tetani,Bacillus subtilis,Salmonella typhi,Vibrio cholerae,Escherichia coli and against two fungal pathogens,Aspergillus fumigatus and Candida albicans using broth microdilution mic *** the compounds studied,majority of the compounds were found to active against ***,*** and *** as compared to first-line standard drugs.

关键词： N-arylquinoline 2-Morpholinoquinoline-3-carbaldehyde In vitro antimicrobial activity MCR

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