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新型炭材料 2016年第3期31卷 336-342页

作者：刘立乐 K.p.Annamalai 陶有胜福州大学化学学院福建福州350108 中国科学院海西研究院中国科学院功能纳米结构设计与组装重点实验室福建福州350002

采用水热法合成了纳米带状多孔CuCo_2S_4/石墨烯复合材料,并通过扫描电镜、透射电镜、X-射线衍射、77 K氮气吸附等方法对其进行了表征分析。该复合材料具有0.7~1.2 nm微孔和2~10 nm介孔,其总孔容为0.1 cm^3·g^(-1)。电化学性能研究表明... 详细信息

采用水热法合成了纳米带状多孔CuCo_2S_4/石墨烯复合材料,并通过扫描电镜、透射电镜、X-射线衍射、77 K氮气吸附等方法对其进行了表征分析。该复合材料具有0.7~1.2 nm微孔和2~10 nm介孔,其总孔容为0.1 cm^3·g^(-1)。电化学性能研究表明,该材料应用于超级电容器具有良好的电化学储能性能。

关键词：石墨烯金属硫化物复合材料微孔介孔超级电容器

Isolation and Spectroscopic Characterization of protonated Mixed [Tetrakis (4-pyridyl)porphyrinato] (phthalocyaninato)Rare Earth (Ⅲ)Double-decker Compounds

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Chemical Research in Chinese Universities 2001年第2期17卷 134-142页

作者： JIANG Jian-zhuang,LIU Wei ,SUN Xuan ,ZHANG Xian-xi and NG Dennis K. p. (Key Laboratory for Colloid and Inter face Chemistry of the Educational Ministry, Department of Chemistry, Shandong University, Jinan 250100, p. R. China Department of Chemistry, The 山东大学教育部胶体与界面化学重点实验室山东济南 250100 香港中文大学香港

The treatment of tetrakis (4-pyridyl) porphyrin H2Tpyp with a hydrated rare earth (III) acetylacetonate RE(acac)3 · nH2O (RE=Y, Eu, Gd) in 1,2, 4-trichlorobenzene (TCB) pro- duced a monomeric porphyrinato rare earth compound RE (Tpyp) acac, which further reacted with dicyanobenzene in amyl alcohol in the presence of 1, 8-diazabicyclo [5. 4. 0] undec-7-ene (DBU), giving HRE(Tpyp) (pc) in a good yield. Upon exposure to air, part of the protonated mixed double-deckers in CHC13 solutions converted slowly to the corresponding neutral complexes RE (Tpyp) (pc). These protonated complexes were characterized by means of UV-V is, IR, NMR, mass spectroscopies. The quaternarization of these protonated mixed double-deckers with methyl iodide produced the salts of tetramethylated cations [HRE(TMpyp) (pc)]4+.

关键词： Mixed sandwich complex porphyrinate phthalocyaninate Rare earth complex

COVID-19 rebound after oral treatment in a nursing home facility:A case series

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Infectious Medicine 2022年第4期1卷 285-287页

作者： Alex p.Betrosian Stavros M.Christou Stavroula Kalathaki Evgenidion Hospital Athens UniversityPapadiamantopoulou 2011527 AthensGreece Kallisto Skilled Nursing Facility AthensGreece

paxlovid(nirmatrevir/ritonavir)is a 2 drug regimen taken together twice daily for 5 days was authorized for emergency use for nonhospitalized patients who are at risk for the progression of coronavirus disease(COVID-19).However,recurrence of symptoms 2–8 days after completing the treatment course has been recently *** some cases patients tested negative on a direct SARS-CoV-2 viral test and then tested positive again(rebound COVID-19).The disease is mild and requires no additional antiviral *** are limited based on anecdotal case reports and few *** to the available data it is unclear if rebound symptoms are due to the drug treatment,drug resistance,re-infection or impaired immunity.

关键词： COVID-19 Infection paxlovid Nursing facility

Variability of emission lines in the optical spectra of the Herbig Be binary system HD 200775

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Research in Astronomy and Astrophysics 2019年第3期19卷 31-34页

作者： Anastasia p.Bisyarina ANDrey M.Sobolev Stanislav Yu.Gorda Anatoly S.Miroshnichenko Astronomical Observatory of the Ural Federal University Department of physics and Astronomy University of North Carolina at Greensboro Main (pulkovo) Astronomical Observatory of the Russian Academy of Sciences Fesenkov Astrophysical Institute

In our previous papers we have improved the value of the orbital period of the binary Herbig Be star HD 200775 and showed that the [O I] and Si II 6347 and 6371 ?A emission lines displayed variations which correlate with the orbital period. In this paper we provide evidences that other broad emission lines of metals in the spectra of HD 200775 also exhibit variability, which is probably related to the orbital cycle of the binary. Analysis was performed based on the high-resolution spectral data collected over a time span of 6 years at the Kourovka Astronomical Observatory of the Ural Federal University(Russia) and the Three College Observatory of the University of North Carolina at Greensboro(USA) as well as archival spectral data compiled since 1994. We report new data points in the radial velocity curve of the He I 5876 ?A line near the extremal values of the radial velocity.

关键词： techniques spectroscopic-stars variables T Tauri,Herbig Ae/Be-stars individual HD 200775

Effect of seed mass on emergence and seedling development in pterocarpus marsupium Roxb.

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Journal of Forestry Research 2014年第2期25卷 415-418页

作者： Yogeshwar Mishra Rimi Rawat p. K. Rana M. K. Sonkar Naseer Mohammad Tropical Forest Research Institute

We investigated the effect of seed mass on emergence, seedling survival and growth ofpterocarpus marsupium Roxb., a medium to large, commercially valuable and deciduous tree species. Among the three size classes viz. small （10-12 mm）, medium （13-15 mm） and large （16-17 mm）, the maximum proportion, of seed by number （54.12%） and dry weight （51.87%） was recorded, in the medium size seed class. Seed length and seed width were greatest in the large seed class （16.50 mm, 7.33 mm） followed by medium （13.50 mm, 5.60 mm） and small （11.37 ram, 3.66 mm）. Similarly, hundred seed weight （100 sw） varied from a maximum of 12.92 g in the large seed class to intermediate 10.95 g in the medium seed class and minimum of 7.02 g in the small seed class. The large seed size showed maximum emergence and shoot length over the medium and small seed class. After six months of growth, significant variations due to seed size were also observed for the growth and dry weight of p. marsupium seedlings. Seedling vigour, expressed in terms of height, collar diameter, number of leaves and dry biomass, was sig- nificantly affected by seed class. Seedlings that emerged from large seeds showed better growth and produced heavier seedlings as compared to medium and small seeds.

关键词： emergence grading pterocarpus marsupium seedling

AGGLOMERATION AND RADIATION EFFECT OF THE pULL OF URBANIZATION

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Chinese Geographical Science 2003年第3期13卷 224-227页

作者： QI Jin-li (School of Economics, Huazhong University of Science and Technology, Wuhan 430074, p. R. China) School of Economics Huazhong University of Science and Technology Wuhan 430074 P. R. China

In order to explore the train of thought for China’s urbanizing development and coordinated rural economic development, and to find good ways of solving rural problems through urbanization, this paper absorbs the push-and-pull forces theory and the systematic dynamic theory in the traditional population migration theories, views urbanization as a dynamic system, makes research on the push-and-pull mechanism of urbanization. The pulling power of urbanization is analyzed according to two aspects, the agglomeration effect and the radiation effect of cities. The agglomeration effect provides continuous propelling force for urbanization, and the radiation effect further accelerates the urbanization process by pushing forward the development of rural economy. Of course, the slow development of urbanization can result in the hindrance to rural economic development.

关键词： agglomeration effect radiation effect pull of urbanization

Attenuation of Carbon Tetrachloride-Induced Hepatotoxicity by Cow Urine Distillate in Rats

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Biomedical and Environmental Sciences 2009年第4期22卷 345-347页

作者： M p GURURAJA A B JOSHI HIMANSHU JOSHI D SATHYANARAYANA E V S SUBRAHMANYAM K S CHANDRASHEKHAR Nitte Gulabi Shetty Memorial Institute of pharmaceutical Sciences Paneer

Objective To study the carbon tetrachloride-induced hepatoprotective activity in cow urine. Methods Effect of cow urine distillate on liver function was studied in vivo in rats intoxicated with carbon tetrachloride （CC14）. Hepatotoxicity was induced by a 1 ： 1 （v/v） mixture of CCl4 in olive oil （5 mL/kg i.p）. protective effect of cow urine distillate （in three dose levels） and standard drug Silymarin （100 mg/kg, p.o） on liver function were studied in intoxicated rats. parameters in the study included liver function tests and histological observations. Results The cow urine distillate decreased the levels of SGOT, SGpT, ALp, GGT, and total bilirubin in a dose-dependent manner （p〈0.05） as sylimarin. Conclusion The observed protective effects of cow urine distillate on liver function might be due to the presence of antioxidants in cow urine.

关键词： Hepatotoxicity Cow urine distillate CCl4 Silymarin

A Thermochemical Study of the Reaction of Lanthanum Nitrate with Alanine

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Chemical Research in Chinese Universities 2000年第4期16卷 347-350页

作者： LI Qiang-guo (Department of Chemistry, Chenzhou Teacher’ s College, Hunan 423000, p. R. China) Chenzhou Teachers Coll Dept Chem Hunan 423000 Peoples R China

The standard molar reaction enthalpy of the solid-solid coordination reaction La(NO3)3. 6H2O (s) +4Ala(s) (Ala is Alanine)=La(NO3)3·(Ala)4·H2O(s) + 5H2O(1) was studied by using classical solution calorimetry. The molar dissolution enthalpies of the reactants and the product of the solid-solid coordination reaction in 2 mol/L HCl were measured by using an isoperibol calorimeter. From the results and other auxiliary quantities, the standard molar formation enthalpy of [La (NO3)3·(Ala)4·H2O, s, 298. 15 K] has been determined to be △fHm[La(NO3)3·(Ala)4·H2O, s, 298. 15 K]=-3 864. 248 kJ/mol.

关键词： Lanthanum nitrate Alanine Thermochemistry Standard molar formation enthalpy

Inverse Design of Electron Lens

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Journal of Systems Engineering and Electronics 2001年第1期12卷 49-52页

作者： Tu Yan & Zhong Xuefei Electronics Research Institute, Southeast University, Nanjing 210096, p. R. China Electronics Research Institute Southeast University

The inverse design of electron lens is realized by two different methods in this paper. One is damped least square method and the other is the artificial neural network method. Their merits and defects are discussed according to our calculation results in the paper. In the condition of selecting the learning samples properly, the artificial neural network has obvious advantages in the inverse design of electron lens. It is an effective method to solve the inverse design problem in the electron optic system.

关键词： Electron optics Least squares approximations Neural networks Numerical methods Optical design