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L3 French Conceptual Transfer in the Acquisition of L2 English Motion Events among Native Chinese Speakers

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Language and Semiotic Studies 2020年第2期6卷 81-92页

作者： lijun li the Foreign Language Department China University of Mining and Technology(Beijing)China

The theory of conceptual transfer investigates the extent to which the perception of a previously learned language influences the conceptualization of a language learned *** provide further evidence supporting such hypotheses,the present study invites three groups of native Chinese-speaking college students to finish selected language tasks with an aim to explore whether the perception of L3 French motion verbs presents itself in the acquisition of L2 English path *** three participating groups have learned English as L2 and reached intermediate level,with one group being Chinese majors and the other two specializing in French with different proficiency *** findings suggest L3 would exhibit negative transfer in the acquisition of motion events in L2 *** on the analysis of participants’retrospective data and the comparison between Chinese group and French groups,the nature of such transfer is claimed to be *** also reveal L3 proficiency exerts no influence on conceptual transfer.

关键词： conceptual transfer motion events lateral transfer

Catalytic action of rare earth oxide(La_(2)O_(3),CeO_(2),Pr_(6)O_(11))on electrochemical oxidation of activated carbon in molten KOH-NaOH

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Journal of Rare Earths 2022年第7期40卷 1083-1090页

作者： Xiaofeng li Yuanxing Dong Xiaohui liu lijun li Yanfang Gao Zhenzhu Cao Jinrong liu College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China

The oxidation of anode carbon fuel directly affects the electrochemical performance of molten hydroxide direct carbon fuel cell(MHDCFC).In general,the anode carbon fuel can be oxidized at high temperature,thus the direct carbon fuel cell(DCFC)can show great electrochemical *** this study,rare earth oxides(La_(2)O_(3),CeO_(2),Pr_(6)O_(11))were prepared by the method of *** carbon was prepared by pretreatment of *** earth oxides and activated carbon were mixed as anode carbon fuel,and rare earth oxides were used to catalyze the electrochemical oxidation of anode carbon *** results show that CeO_(2)has better electrocatalytic activity compared with La_(2)O_(3)and Pr_(6)O_(11) in the *** electrochemical test results show that the current density(at 0.4 V)increases from 81.02 to 112.90 mA/cm^(2)and the maximum power density increases from 34.78 to 47.05 mW/cm^(2)at 450℃,when the mass fraction of CeO_(2)is increased from 0 to 40%.When the mass fraction of CeO_(2)is 30%,the current density(82.55 mA/cm^(2)at 0.4 V)at 400℃is higher than that(81.02 mA/cm^(2)at 0.4 V)without CeO_(2)at 450℃.The electrochemical oxidation mechanism of CeO_(2)catalyzed anode carbon fuel is discussed.

关键词： Rare earth oxide Catalysis Activated carbon Electrochemical oxidation Molten hydroxide direct carbon fuel cell

Preparation of Sn-doped Ga_(2)O_(3) thin films and their solar-blind photoelectric detection performance

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Journal of Semiconductors 2023年第6期44卷 65-74页

作者： lijun li Chengkun li Shaoqing Wang Qin Lu Yifan Jia Haifeng Chen Key Laboratory of Advanced Semiconductor Devices and Materials School of Electronic EngineeringXi’an University of Posts&TelecommunicationsXi’an 710121China

Sn doping is an effective way to improve the response rate of Ga_(2)O_(3) film based solar-blind detectors. In this paper,Sn-doped Ga_(2)O_(3) films were prepared on a sapphire substrate by radio frequency magnetron sputtering. The films were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and ultraviolet visible spectroscopy, and the effect of annealing atmosphere on the properties of films was studied. The Ga_(2)O_(3) films changed from amorphous to β-Ga_(2)O_(3) after annealing at 900 °C. The films were composed of micro crystalline particles with a diameter of about 5–20 *** β-Ga_(2)O_(3) had high transmittance for wavelengths above 300 nm, and obvious absorption for solar-blind signals at 200–280 *** metal semiconductor metal type solar-blind detectors were prepared. The detector based on Sn-doped β-Ga_(2)O_(3) thin film annealed in N_2 has the best response performance to 254 nm light. The photo-current is 10 μA at 20 V, the dark-current is 5.76 pA,the photo dark current ratio is 1.7 × 10~6, the response rate is 12.47 A/W, the external quantum efficiency is 6.09 × 10~3%, the specific detection rate is 2.61 × 10~(12) Jones, the response time and recovery time are 378 and 90 ms, respectively.

关键词： Sn doped Ga_(2)O_(3) RF magnetron sputtering solar-blind photodetector

Different survival of chromium-exposed Oxya chinensis among allozyme genotypes

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Journal of Environmental Sciences 2009年第4期21卷 509-513页

作者： li lijun LU Fuping ZHANG Min GUO Yaping MA Enbo School of life Science and Technology Shanxi University Taiyuan 030006 China Institute of Soil Science and Fertilizer Shanxi Academy of Agricultural Sciences Taiyuan 030031 China Environment and Plant Protection Institute Chinese Academy of Tropical Agricultural Sciences Key Laboratory for Baleful Biology Detection and Monitor of Tropical Agriculture of Hainan Province Danzhou 571737 China

The goal of the present study was to compare the different survival of Oxya chinensis exposed to chromium（VI） among allozyme genotypes to gain a better understanding of the relationship between the genetic variations and environmental disturbance. This study analyzed the occurrence of genotypes in O. chinensis population exposed to Cr（VI）. O. chinensis samples were collected at Yuanping, Shanxi Province, China and used in acute toxicity tests. Specimens were assigned to Cr（VI） exposure （LDs0：291.0 mg/kg） for 24 h. The genetic composition of both dead and survived specimens was analyzed with horizontal starch gel electrophoresis in four enzymes （GPI, PGM, LDH, and ME）. The results indicated that under Cr（VI） exposure, specimens with different genotypes had various mortalities at the four loci in laboratory conditions, and there was a genetic basis for tolerance in O. chinensis during acute exposure to Cr（VI）.

关键词： allozyme genotype tolerance chromium(VI) Oxya chinensis

Refractive index and temperature optical fiber sensor based on thin core S-taper and spherical structure

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Optoelectronics Letters 2022年第6期18卷 321-325页

作者： YANG Fan CAO Ye li Meiqi JU Hui li lijun School of Electronic and Information Qingdao UniversityQingdao 266071China College of Electronic Information Engineering Shandong University of Science and TechnologyQingdao 266590China

A Mach-Zehnder interferometer(MZI)for simultaneously measuring refractive index(RI)and temperature is proposed and verified in this *** sensor head is composed of thin core fiber(TCF)S-taper structure and spherical *** monitoring two interference dips,experimental results show that the RI sensitivities are-70.392 nm/RIU and-60.08 nm/RIU in the RI range of 1.3384—1.3500,*** the temperature sensitivities are 0.05072 nm/℃and 0.0717 nm/℃in the temperature range of 30—70℃,*** simultaneous measurement of the temperature and external RI is demonstrated based on the sensitive *** sensor also has the advantages of low cost,simple structure and high sensitivity.

关键词： fiber interferometer taper

Sensitive detection of DNA methyltransferase activity based on supercharged fluorescent protein and template-free DNA polymerization

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Science China Chemistry 2016年第7期59卷 809-815页

作者： Daiqi li Guoyan Lu Chunyang Lei Zhen Wang lijun li Zhou Nie Yan Huang Shouzhuo Yao State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University

DNA methylation, catalyzed by DNA methyltransferases(MTases), is a key component of genetic regulation, and DNA MTases have been regarded as potential targets in anticancer therapy. Herein, based on our previously developed DNA-mediated supercharged green fluorescent protein(Sc GFP)/graphene oxide(GO) interaction, coupled with methylation-initiated template-free DNA polymerization, we propose a novel fluorescence assay strategy for sensitive detection of DNA MTase activity. A hairpin DNA with a methylation-sensitive site and an amino-modified 3′-terminal(DNA-1) was designed and worked as a starting molecule. In the presence of DNA MTase, methylation-sensitive restriction endonuclease, and terminal deoxynucleotidyl transferase(Td T), DNA-1 can be sequentially methylated, cleaved, and further elongated. The resulting long DNA fragments quickly bind with Sc GFP and form the Sc GFP/DNA nanocomplex. Such nanocomplex can effectively protect Sc GFP from being adsorbed and quenched by GO. Without the methylation-initiated DNA polymerization, the fluorescence of Sc GFP will be quenched by GO. Thus, the DNA MTase activity, which is proportional to the amount of DNA polymerization products, can be measured by reading the fluorescence of Sc GFP/GO. The method was successfully used to detect the activity of DNA adenine methylation(Dam) MTase with a wide linear range(0.1–100 U/m L) and a low detection limit of 0.1 U/m L. In addition, the method showed high selectivity and the potential to be applied in a complex sample. Furthermore, this study was successfully extended to evaluate the inhibition effect of 5-fluorouracil on Dam MTase activity and detect Td T activity.

关键词： DNA methyltransferase supercharged fluorescent protein graphene oxide DNA polymerization

The role of fluid restriction in abdominal surgery

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Hepatobiliary Surgery and Nutrition 2019年第2期8卷 192-193页

作者： Feng Shao Zhang Du lijun li Department of Anus and Intestine Surgery Dongyang People HospitalDongyang 322100China

Recently,Myles et al.(1)published a multi-center randomized controlled trial(RCT)concluding that compared to liberal fluid regimen,restricted fluid regimen did not improve clinical outcomes in patients after abdominal *** fluid management plays an important role in postoperative *** fluid accumulation was associated with poor outcomes in surgical patients(2),restricted fluid protocol was investigated to alleviate this ***,the conclusions remain *** contrast to Myles et al.'s finding,the benefits of restricted fluid protocol have been reported in several RCTs(PMID:12044376,14578723,21948211).

关键词： al. fluid surgery

Overexpression and characterization of a thermostable β-agarase producing neoagarotetraose from a marine isolate Microbulbifer ***1

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Acta Oceanologica Sinica 2019年第2期38卷 96-106页

作者： Yanbing Zhu He Gao Hebin li Hui Ni Zedong Jiang lijun li Anfeng Xiao College of Food and Biological Engineering Jimei University Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering Research Center of Food Biotechnology of Xiamen City Key Laboratory of Systemic Utilization and In-depth Processing of Economic Seaweed Xiamen Southern Ocean Technology Center of China Department of Pharmacy Xiamen Medical College

An agarase gene containing 1 302 bp was cloned from Microbulbifer sp. AG1. It encoded a mature protein of 413 amino acids plus a 20-residue signal peptide. The recombinant enzyme without the signal peptide was expressed and purified from Escherichia coli BL21(DE3). When agarose was used as a substrate, the optimal temperature and pH for the enzyme were 60℃ and 7.5, respectively. The recombinant agarase showed excellent thermostability with 67% and 19% of residual activities after incubation at 50℃ and 60℃ for 1 h, *** SDS, the recombinant agarase had a relatively good resistance against the detected inhibitors, detergents and urea denaturant. Thin layer chromatography analysis and enzyme assay using p-nitrophenyl-α/β-Dgalactopyranoside revealed that the recombinant agarase was a β-agarase that degraded agarose into neoagarotetraose as the main end product. The enzymatic hydrolysis products with different degree of polymerization exhibited the antioxidant activities.

关键词： thermostable β-agarase neoagarotetraose Microbulbifer sp.

Characteristics and mechanism of Ni^(2+)and Cd^(2+)adsorption by recovered perlite from agar extraction residue

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Chinese Journal of Chemical Engineering 2024年第8期72卷 141-152页

作者： Juan Wang Yanbing Zhu Zedong Jiang Xiping Du Mingjing Zheng lijun li Hui Ni Yuanpeng Wang Zhipeng li Qingbiao li College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering Xiamen 361021China Research Center of Food Biotechnology of Xiamen City Xiamen 361021China Xiamen Ocean Vocational College Xiamen 361021China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361021China

Ni^(2+)and Cd^(2+)in wastewater accumulated through the ecological chain and could jeopardize human *** of Ni^(2+)and Cd^(2+)from wastewater using recovered perlite was an important way to solve the problem of resource utilization of solid waste from agar *** previous study confirmed that recovered perlite from agar extraction residue had better pore size and specific surface area than commercial ***,the adsorption efficiency and adsorption mechanism of recovered perlite were the main factors limiting its adsorption *** adsorption process of Ni^(2+)and Cd^(2+)by recovered perlite in aqueous solution was described by the pseudo-second-order kinetic equation,and the relevant adsorption mechanism was mainly *** with commercial perlite,the adsorption removal rate of Ni^(2+)and Cd^(2+)by enzymatic recovered perlite could reach 92.9%and 89.2%,respectively,and were improved by 12.63%and 13.03%.Langmuir isothermal adsorption model could better describe the isothermal adsorption process of recovered perlite on heavy metal Ni^(2+)and Cd^(2+),and the relevant adsorption mechanism was mainly monolayer *** X-ray photoelectron spectroscopy(XPS)results indicated that the decrease of Si—O Si^(2+)hydroxyl coordination bond and the increase of C—Si bond might make the binding effect of recovered perlite with heavy metals *** competitive adsorption of Ni^(2+)and Cd^(2+)by recovered perlite was still dominated by chemisorption and monolayer *** study was expected to provide a theoretical basis and technical support for the removal of Ni^(2+)and Cd^(2+)from wastewater using recovered perlite from seaweed residue.

关键词： Agar extraction residue Recovered perlite Heavy metal ion Adsorption property