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Science China Earth Sciences 2015年第6期58卷 1084-1099页

作者： lIU Yi Can DENG liangPeng GU Xiaofeng CAS Key laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of China

High-temperature(HT, >850℃) metamorphism in continental collision orogens, particularly for those ultrahigh-pressure(UHP) metamorphic rocks, has become one of the remarkable topics in Earth science. It has bearing on the element and isotope behaviors of UHP rocks, their partial melting and related geodynamic effects during exhumation. In this paper, five representative continental collision orogens with typical HT/UHP rocks, including the Dabie orogen in China, the Kokchetav in Kazakhstan, the Caledonides in Greenland, the Rhodope in Greece, and the Erzgebirge in Germany are introduced, and their HT/UHP metamorphism and evolution processes are summarized. In addition, metamorphic P-T-t paths, multistage exhumation processes, and partial melting and preservation and retrogression of UHP index minerals during exhumation and their possible mechanisms are discussed. On this basis, the forthcoming key fields and scientific subjects of HT/UHP rocks within continental subduction channel are proposed.

关键词： continental subduction-collision zone high-T ultrahigh-pressure rock P-T-t path multistage exhumation partial melting

A new semi-quantitative Surface-Enhanced Raman Spectroscopy (SERS) method for detection of maleimide (2,5-pyrroledione) with potential application to astrobiology

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Geoscience frontiers 2021年第5期12卷 421-426页

作者： J.Aramendia l.Gomez-Nubla M.l.Tuite K.H.Williford K.Castro J.M.Madariaga Jet Propulsion laboratory California Institute of Technology4800 Oak Grove DrPasadenaCA 91109United States Department of Analytical Chemistry University of the Basque Country UPV/EHUP.O.Box 64448080 BilbaoSpain

Nitrogen-containing heterocyclic compounds are fundamental biochemical components of all life on Earth and,presumably,life elsewhere in our solar *** and characterization of these compounds by traditional solvent extraction,chromatographic separation,and GC-MS analysis require more sample mass than will be available from samples returned to Earth from *** its small sample mass requirement,Surface Enhanced Raman Spectroscopy could be an appropriate technique for analysis of returned *** have developed a SERS method for the detection of maleimide(2,5-pyrroledione),an N-containing heterocycle with a structure that is widespread in *** semi-quantitative methodology accurately determines maleimide concentration in the range from 60 mg/ml to 120 mg/*** present a maleimide SERS standard spectrum which will be usef.l.as a reference for future *** present work demonstrates an easy,accurate,and effective method for the non-destructive qualitative and semi-quantitative study of maleimide as a first step toward developing a method for analysis of related compounds.

关键词： Maleimide Surface-Enhanced Raman Spectroscopy Astrobiology Biosignature Extraterrestrial life

Adsorption of Pb, Cd to fe, Mn oxides in natural freshwater surface coatings developed in different seasons

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Journal of Environmental Sciences 2005年第1期17卷 30-36页

作者： DONGDe-ming YANGfan lIYu HUAXiu-yi lüXiao-jun ZHANGJing-jing CollegeofEnvironmentandResources JilinUniversityChangchun130023China

Metal oxides(fe, Mn oxides) in natural surface coatings(biof.l.s and associated minerals) are believed to play a significant role in the fate and transport of trace metal in aquatic environments. Seasonal variation of fe, Mn oxides and organic materials in surface coatings, which were developed periodically on glass slides in Nanhu lake, Jilin Province, China over the time frame of three seasons, was investigated in order to understand the influence of metal oxides on Pb and Cd adsorption to heterogeneous surface coating materials(biof.l.). Pb and Cd adsorption was measured under controlled laboratory conditions(mineral salts solution with defined speciation, ionic strength 0 05 mol/l, 25℃ and pH 6 0). The classical langmuir adsorption isotherm was applied to estimate equilibrium coefficients of Pb and Cd adsorption to the surface coatings. In general, components in the surface coatings varied greatly with seasons altering and obtained higher concentrations in summer while the content of iron oxides always exceeded that of manganese oxides. Correlation analyses between the maximum adsorption of Pb and Cd and components in the surface coatings developed periodically indicated that Pb phase association with Mn oxides and Cd phase association with fe oxides as well as Mn oxides were statistically significant. Effect of Mn oxides on Cd adsorption was confirmed in view of its higher content in the surface coatings. The importance of ferromanganese oxides for Pb and Cd adsorption to the natural surface coatings developed in different seasons was evidenced.

关键词： iron oxides manganese oxides Pb and Cd adsorption natural water

转染Il-6基因增强MCf-7人乳腺癌细胞肿瘤相关抗原的表达(英文)

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中国临床药理学与治疗学 2007年第3期12卷 275-281页

作者：江贤朋 Robert l.Elliott Jonathan f. Head 乳腺研究所 E.E.H.乳腺癌研究和治疗中心17050MedicalCenterDr

目的研究Il-6影响癌症预后的机制和Il-6与乳腺癌肿瘤相关抗原CA15-3 , CEA和CA125的关系。方法转染外源Il-6基因到MCf-7细胞株,用酶联免疫吸附法(ElISA)定量培养液中细胞分泌的CA15-3 ,CEA和CA125。结果在72 h培养后,成功转染pCI-neo-I... 详细信息

目的研究Il-6影响癌症预后的机制和Il-6与乳腺癌肿瘤相关抗原CA15-3 , CEA和CA125的关系。方法转染外源Il-6基因到MCf-7细胞株,用酶联免疫吸附法(ElISA)定量培养液中细胞分泌的CA15-3 ,CEA和CA125。结果在72 h培养后,成功转染pCI-neo-Il-6质粒的MCf-7细胞分泌Il-6(338 .5±22 .6) pg/106细胞明显高于没有转染的细胞(25 .4±4 .6) pg/106细胞(Pl-6基因的质粒pCI-neo转染的细胞(19 .6±3 .0) pg/106细胞(Pl-6转染的MCf-7细胞分泌CA15-3 ,CEA和CA125同样明显高于没有转染的细胞和空载体pCI-neo转染的MCf-7细胞。特异性Il-6抗体降低CA15-3 ,CEA和CA125在MCf-7细胞和Il-6 cDNA转染的MCf-7细胞中表达。结论转染Il-6基因可增强人乳腺癌细胞肿瘤相关抗原的表达,高Il-6血症的乳腺癌病人预后不良部分原因可能是高Il-6刺激癌细胞表达肿瘤相关抗原。

关键词：乳腺癌肿瘤相关抗原白介素-6 基因转染

Selective hydrogenation of acetylene over Pd/CeO2

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frontiers of Chemical Science and Engineering 2020年第6期14卷 929-936页

作者： Kai li Tengteng lyu Junyi He Ben W.l.Jang Department of Chemistry Texas A&M University CommercePO Box 3011CommerceTX 75429USA

five hundred ppm Pd/CeO2 catalyst was prepared and evaluated in selective hydrogenation of acetylene in large excess of ethylene since ceria has been recently found to be a reasonable stand-alone catalyst for this ***/CeO2 catalyst could be activated in situ by the feed gas during reactions and the catalyst without reduction showed much better ethylene selectivity than the reduced one in the high temperature range due to the formation of oxygen vacancies by *** ethylene selectivity of〜100%was obtained in the whole reaction temperature range of 50℃-200℃ for samples calcined at temperatures of 600℃ and 800℃.This could be ascribed to the formation of PdX-Ce1-xO2-y or Pd-O-Ce surface species based on the X-ray diffiaction and X-ray photoelectron spectroscopy results,indicating the strong interaction between palladium and ceria.

关键词： selective hydrogenation acetylene Pd/CeO2 strong interaction

Isolation of a salt tolerant laccase secreting strain of Trichoderma sp. NfCCI-2745 and optimization of culture conditions and assessing its efectiveness in treating saline phenolic efuents

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Journal of Environmental Sciences 2013年第12期25卷 2410-2416页

作者： l.M.Divya G.K.Prasanth C.Sadasivan Department of Biotechnology and Microbiology Kannur University

Most of the hazardous pollutants are phenolic in nature and persists in the environment. The ability of.l.ccases to oxidize phenolic compounds and reduce molecular oxygen to water has led to intensive studies of these enzymes. Therefore the fungal strains with high laccase activity and substrate affinity that can tolerate harsh environmental conditions have a potential for biotechnological applications. Salt tolerant laccase secreting fungi can be utilized in treatment of saline and phenolic rich industrial ef.l.ents such as coir ef.l.ent and textile ef.l.ent that needed to be diluted several f.l. before microbial treatment. This is the first study describing the isolation and optimization of a salt tolerant strain of Trichoderma sp. potential for industrial applications. The fungus was identified based on morphological characteristics and was subsequently confirmed with molecular techniques and deposited at National fungal Culture Collections of India （NfCCI） under the Accession No. Trichoderma viride NfCCI 2745. In contrast to other laccase secreting fungi, light conditions did not exert much influence on laccase production of this strain and salinity enhanced its laccase secretion. The fungus effectively removed the phenolic content of the textile ef.l.ent, coir-ret liquor and wood processing ef.l.ent within 96 hr of incubation. The tolerance of the fungus to high salinity and phenolic compounds makes this strain ideal for treating saline and phenolic rich industrial ef.l.ents.

关键词： laccase optimization phenol tolerant salt tolerant Trichoderma viride

Non-polynomial Zig-Zag and ESl shear deformation theory to study advanced composites

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Chinese Journal of Aeronautics 2019年第4期32卷 906-920页

作者： J.l.MANTARI I.A.RAMOS J.C.MONGE faculty of Mechanical Engineering Instituto de investigación en ingeniería naval(IDIIN)National University of Engineering(UNI)Lima 15333Peru Department of Mechanical Engineering University of New Mexico faculty of Mechanical Engineering Universidad de Ingeniería y Tecnología(UTEC)

The mechanical behavior of advanced composites can be modeled mathematically through unknown variables and Shear Strain Thickness functions(SSTfs). Such SSTfs can be of polynomial or non-polynomial nature and some parameters of non-polynomial SSTfs can be optimized to get optimal results. In this paper, these parameters are called ‘‘r" and ‘‘s" and they are the argument of the trigonometric SSTfs introduced within the Carrera Unified formulation(CUf). The Equivalent Single layer(ESl) governing equations are obtained by employing the Principle of Virtual Displacement(PVD) and are solved using Navier method solution. furthermore, trigonometric expansion with Murakami theory was implemented in order to reproduce the Zig-Zag effects which are important for multilayer structures. Several combinations of optimization parameters are evaluated and selected by different criteria of average error. Results of the present unified trigonometrical theory with CUf bases confirm that it is possible to improve the stress and displacement results through the thickness distribution of models with reduced unknown variables. Since the idea is to find a theory with reduced numbers of unknowns, the present method appears to be an appropriate technique to select a simple model. However these optimization parameters depend on the plate geometry and the order of expansion or unknown variables. So, the topic deserves further research.

关键词： Analytical solution Composite materials CUf ESl Plate Trigonometric functions Zig-Zag effects

Effects of Electric field on the Electronic Structures in Electroluminescent Polymers

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Journal of Materials Science & Technology 1999年第4期15卷 354-356页

作者： fu, Rl Chu, JH fu, RT li, l Sun, X Chinese Acad Sci Shanghai Inst Tech Phys Natl Lab Infrared Phys Shanghai 200083 Peoples R China fudan Univ Dept Phys Shanghai 200433 Peoples R China

The effects of the electric field on the electronic structures in electroluminescent polymers were studied with the tight-binding model including electron-phonon interactions plus an applied electric field. It is found that the applied electric field changes both the energy levels and the electronic wavefunctions in electroluminescent polymers: applied field induces two localized electronic states near the midgap, and also polarizes these localized electronic states, so the polarization occurs at weak or moderate fields. In addition, the strong field will dissociate a bipolaron exciton and lead to photoluminescence quenching.

关键词： Polymers

Radon exhalation from phosphogypsum stabilized in sulfur polymer cement

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Natural Science 2013年第5期5卷 646-652页

作者： Irene García-Diaz francisco José Alguacil Manuel Gázquez Juan Pedro Bolivar Israel lópez Coto f.l.x A. lópez Centro Nacional de Investigaciones Metalúrgicas (CENIM) CSIC Avda. Gregorio del Amo Madrid Spain Departamento de física Aplicada Universidad de Huelva Campus del El Carmen Huelva Spain

Phosphogypsum (PG), primary by-product from phosphoric acid production, is accumulated in large stock-piles which were active until 2010, when spills were banned. It is considered as NORM material that contains radionuclides from 238U and decay series which are of most radiotoxicity. PG was valorized and/or recycled in a building material, sulfur polymer cement (SPC). The SPC-PG samples reach the international regulation to use in the manufacture of building materials without radiological restrictions, except the sample with the 50% of PG. Under normal conditions of ventilation the contribution to the expected radon indoor concentration is also below the international recommendation.

关键词： Radon Phosphogypsum NORM Radioactivity Sulfur polymer Cement

Study on denoising of continuous spectrum on-line monitoring signal of water quality with micro-reagents based on HHT

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Optoelectronics letters 2022年第2期18卷 115-121页

作者： lI Wen lÜ Binbin fU Hao CAI Yongqing Institute of Mechanical and Electrical Engineering North China University of TechnologyBeijing 100144China

A continuous spectrum water quality on-line monitoring signal processing method based on Hilbert-Huang transform(HHT) is proposed in this paper, which combines the micro-reagent water quality on-line monitoring technology of sequential injection. The modulation signal and spectrum curve of each intrinsic mode function(IMf) component of the original spectrum signal were obtained by empirical mode decomposition(EMD). The water sample data of different concentrations in the continuous spectrum on-line monitoring system was analyzed by the HHT model. The noise signal was excavated to realize the noise reduction processing, and the reconstruction of the continuous spectrum signal was realized after the noise reduction processing was completed. The research results show that this method can effectively reduce the noise of continuous spectrum signals according to different signal-to-noise characteristics of continuous spectrum, and has convenient use, fast processing speed, and high resolution in the time-frequency domain, which effectively improves the stability and accuracy of the micro-reagent continuous spectrum water quality on-line monitoring system.

关键词： signal spectrum continuous