检索结果-南通市图书馆

Journal of Materials Science & Technology 2021年第24期83卷 113-122页

作者： Zhanyong Gu Zhitao Cui zijing wang Tingru Chen Peng Sun Dawei Wen Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai9808578Japan School of Materials Science and Engineering Anhui University of TechnologyMaanshan243002China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China School of Applied Physics and Materials Wuyi UniversityJiangmen529020China

The pristine carbon nitride derived from the thermally-induced polymerization of nitrogen-containing precursors(***,dicyanamide,melamine and urea)displays low crystallinity because of the predominantly kinetic ***,we reported a modified molten-salts method to fabricate the crystalline carbon nitride under ambient pressure,which is expected to the large-scale production of crystalline carbon *** obtained crystalline carbon nitride displayed about 3.0 times higher photocatalytic NO removal performance than that of pristine carbon nitride under visible light irradiation(λ<400 nm).Detailed experimental characterization and theoretical calculation revealed the crucial roles of crystallinity in crystalline carbon nitride for the enhanced photocatalytic NO removal *** research provided deep insights into the crystallinity of carbon nitride for the enhanced photocatalytic performance.

关键词： Carbon nitride Crystallinity Molten-salts method Photocatalytic NO removal DFT

pH-controlled DNAzymes： Rational design and their applications in DNA-machinery devices

在线全文

学校读者我要写书评

暂无评论

Nano Research 2016年第10期9卷 3084-3092页

作者： Yuqi Chen Yanyan Song Zhiyong He zijing wang Wenting Liu Fuanwang Xiaolian Zhang Xiang Zhou College of Chemistry and Molecular Sciences The Institute for Advanced Studies Wuhan University Wuhan 430072 China School of Medicine Wuhan University Wuhan 430071 China

The availability and reliability of strategies for molecular biosensing over a finely adjustable dynamic range is essential to enhance the understanding and control of vital biological process. To expand the versatility and utility of nucleic acid- related enzymes, we demonstrated a rational approach to acquiring tunable, pH-dependent deoxyribozymes （DNAzymes） with catalytic activities and response sensitivities that can be tuned through a simple change in solution pH. To do this, we capitalized upon the pH dependence of Hoogsteen interactions and designed i-motif- and triplex-based DNAzymes that can be finely regulated with high precision over a physiologically relevant pH interval. The modified DNAzymes are dependent upon pH for efficient cleavage of substrates, and their catalytic performance can be tuned by regulating the sequence of inserted i-motif/triplex structures. The principle of tunable, pH-dependent DNAzymes provides the opportunity to engineer pH-controlled DNA-machinery devices with unprecedented sensitivity to pH changes. For example, we constructed a DNA-walker device, the stepping rate of which could be adjusted by simply modulating solution pH within an interval of 5.6 to 7.4, as well as a DNA tetrahedron that can be opened at pH 6.4 and kept closed at pH 7.4. The potential of this approach is not limited to serve as pH-dependent devices, but rather may be combined with other elements to expand their practical usefulness.

关键词： pH iMNAzyme TNAzyme DNA walker DNA tetrahedron

Carbon dioxide fixation by Chlorella ***-01 with a fermentor-helical combined photobioreactor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2011年第3期5卷 402-408页

作者： Xuan JIA Hai YAN zijing wang Huanju HE Qianqian XU Haiou wang Chunhua YIN Liqin LIU Department of Biological Science and Technology University of Science and Technology BeijingBeijing 100083China

A promising microalgal strain isolated from fresh water,which can grow both autotrophically on inorganic carbon under lighting and heterotrophically on organic carbon without lighting,was identified as Chlorella ***-01 with the phylogenetic analysis based on 18S ribosomal ribonucleic acid(rRNA)gene *** the heterotrophic batch culture,more than 20.0 g·L^(-1)of cell dry weight concentration(DWC)of Chlorella ***-01 was obtained at day 5,and which was used directly to seed the autotrophic culture.A novel fermentor-helical combined photobioreactor was established and used to cultivate Chlorella ***-01 for the fixation of carbon dioxide(CO_(2)).It showed that the autotrophic growth of Chlorella ***-01 in the combined photobioreactor was more effective than that in the fermentor alone and the maximum DWC of 2.5 g·L^(-1)was obtained at day *** highest CO_(2)fixation of 95%appeared on day 1 in the exponential growth phases of Chlorella ***-01 and 49.8%protein was found in the harvested microalgal cells.

关键词： Chlorella sp.USTB-01 carbon dioxide fixation combined photobioreactor

SnO-SnO_(2) modified two-dimensional MXene Ti3C2Tx for acetone gas sensor working at room temperature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第14期73卷 128-138页

作者： zijing wang Fen wang Angga Hermawan Yusuke Asakura Takuya Hasegawa Hiromu Kumagai Hideki Kato Masato Kakihana Jianfeng Zhu Shu Yin School of Material Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an710021China Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai980-8577Japan The Institute of Scientific and Industrial Research(ISIR) Osaka University Mihogaoka 8-1IbarakiOsaka567-0047Japan

Acetone,as widely used reagents in industry and laboratories,are extremely harmful to the *** the detection of acetone gas concentrations and leaks in special environments at room temperature is ***,the nanocomposite combining SnO-SnO_(2)(p-n junction)and Ti_(3)C_(2)T_(x) MXene was successfully synthesized by a one-step hydrothermal *** of the existence of a small amount of oxygen during the hydrothermal conditions,part of the p-type SnO was oxidized to n-type SnO_(2),forming in-situ p-n junctions on the surface of Sn *** hamburger-like SnO-SnO_(2)/Ti_(3)C_(2)T_(x) sensor exhibited improved acetone gas sensing response of 12.1(R_(g)/R_(a))at room temperature,which were nearly 11 and 4 times higher than those of pristine Ti_(3)C_(2)T_(x) and pristine SnO-SnO_(2),***,it expressed a short recovery time(9 s)and outstanding *** of the different work functions,the Schottky barrier was formed between the SnO and the Ti_(3)C_(2)T_(x) nanosheets,acting as a hole accumulation layer(HALs)between Ti_(3)C_(2)T_(x) and tin ***,the sensing mechanism based on the formation of hetero-junctions and high conductivity of the metallic phase of Ti_(3)C_(2)T_(x) MXene in SnO-SnO_(2)/Ti_(3)C_(2)T_(x) sensors was discussed in detail.

关键词： p-n junction Ti_(3)C_(2)T_(x)MXene Nanocomposites Acetone gas sensor Room temperature sensing

An Improved Method for Correction of Air Temperature Measured Using Different Radiation Shields

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2014年第6期31卷 1460-1468页

作者： CHENG Xinghong SU Debin LI Deping CHEN Lu XU Wenjing YANG Meilin LI Yongcheng YUE Zhizhong wang zijing Public Meteorological Service Center China Meteorological Administration Support Center for Atmospheric Observing Technology Beijing Meteorological Bureau Beijing Observatory Station Beijing Meteorological Bureau Daxing District Bureau of Meteorology Beijing Meteorological Bureau

The variation of air temperature measurement errors using two different radiation shields （DTR502B Vaisala,Finland,and HYTFZ01,Huayun Tongda Satcom,China） was *** were collected in the field at the Daxing weather station in Beijing from June 2011 to May *** air temperature values obtained with these two commonly used radiation shields were lower than the reference records obtained with the new Fiber Reinforced Polymers （FRP） Stevenson *** most cases,the air temperature errors when using the two devices were smaller on overcast and rainy days than on sunny days; and smaller when using the imported rather than the Chinese *** measured errors changed sharply at sunrise and sunset,and reached maxima at *** diurnal variation characteristics were,naturally,related to changes in solar *** relationships between the record errors,global radiation,and wind speed were *** improved correction method was proposed based on the approach described by Nakamura and Mahrt （2005）（NM05）,in which the impact of the solar zenith angle （SZA） on the temperature error is considered and extreme errors due to changes in SZA can be corrected *** errors were reduced significantly after correction by either method for both *** error reduction rate using the improved correction method for the Chinese and imported shields were 3.3％ and 40.4％ higher than those using the NM05 method,respectively.

关键词： radiation shield measurement error impacts of solar zenith angle improved correction method

Visible-blind short-wavelength infrared photodetector with high responsivity based on hyperdoped silicon

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2019年第3期7卷 351-358页

作者： XIAODONG QIU zijing wang XIAOTONG HOU XUEGONG YU DEREN YANG State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University

Developing a low-cost, room-temperature operated and complementary metal-oxide-semiconductor(CMOS)compatible visible-blind short-wavelength infrared(SWIR) silicon photodetector is of interest for security,telecommunications, and environmental sensing. Here, we present a silver-supersaturated silicon(Si:Ag)-based photodetector that exhibits a visible-blind and highly enhanced sub-bandgap photoresponse. The visible-blind response is caused by the strong surface-recombination-induced quenching of charge collection for short-wavelength excitation, and the enhanced sub-bandgap response is attributed to the deep-level electrontraps-induced band-bending and two-stage carrier excitation. The responsivity of the Si:Ag photodetector reaches 504 mA · W^(-1) at 1310 nm and 65 m A · W^(-1) at 1550 nm under-3 V bias, which stands on the stage as the highest level in the hyperdoped silicon devices previously reported. The high performance and mechanism understanding clearly demonstrate that the hyperdoped silicon shows great potential for use in optical interconnect and power-monitoring applications.

关键词： Visible-blind short-wavelength infrared photodetector hyperdoped silicon complementary metal-oxide-semiconductor(CMOS)

IMPROVING EFFECTS OF ELECTROACUPUNCTURE ON REGENERATIVE FEEDBACK LOOP OF SUPERCHIASMATIC NUCLEUS IN MICE WITH BREAST CANCER

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Medicine 2014年第3期 241-242页

作者： zijing wang Hong Xue Chengdu University of Traditional Chinese Medicine

Objective: To observe the changes of expressions of Bmal1, Clock, Cry1 and Cry2 mRNAs in suprachiasmatic nucleus(SCN) of mice with breast cancer after elecreoacunpuncture and to detect the mechanism of electroacupuncture effects on mice with breast ***: C57BL/6J mice were randomly divided into 4 groups: healthy group(n=6), model group(n=6), model mice with electroacupuncture group(n=6) and healthy mice with electroacupuncture group(n=6).Mice in treatment groups accepted acupuncture at CT4 in the 8th, 9th and 10 th day after successful *** mice were sacrificed 2 h later when accepted the third treatment in order to extract samples and detect the indexes with ***: Bmal1, Clock, Cry1 and Cry2 mRNAs expressed in the model mice with electroacupuncture group increased when compared with the model group; Clock mRNA in the healthy mice with electroacupuncture group also increased when compared with the healthy *** results demonstrated improving tendencies, but did not show a statistical ***: This study showed modulated effects of electroacupuncture at CT4 on SCN Bmal1, Clock, Cry1 and Cry2 mRNA expression in C57BL/6J mice with breast *** expression of SCN Bmal1, Clock, Cry1 and Cry2 mRNAs reduced in mice with breast *** mechanism that electroacupuncture modulates the activity rhythm in mice with breast cancer may rely on regulating the regenerative feedback loop in SCN.

关键词： SCN mRNA IMPROVING EFFECTS OF ELECTROACUPUNCTURE ON REGENERATIVE FEEDBACK LOOP OF SUPERCHIASMATIC NUCLEUS IN MICE WITH BREAST CANCER

Carbonic anhydrase 2 mediates anti-obesity effects of black tea as thermogenic activator

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第5期13卷 2917-2936页

作者： Peng Ma Jie Xiao Biyu Hou Ping He Xinyu Yang Yisa wang zijing wang Tianshu Xu Xiuying Yang Xuan Zhu Shasha Xiang Song Li Guanhua Du Jian Ying Guifen Qiang State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening ResearchBeijing 100050China COFCO Nutrition and Health Research Institute Beijing 102209China Department of Pharmacy The Eighth Affiliated HospitalSun Yat-sen UniversityShenzhen 518000China Faculty of Biology Medicine and Health SciencesThe University of ManchesterManchester M139PLUnited Kingdom Changchun University of Chinese Medicine Changchun 130117China School of Food Science and Biotechnology Zhejiang Gongshang UniversityHangzhou 310018China China Tea Technology(Beijing)Co. Ltd.Beijing 102209China Beijing Key Laboratory of Nutrition Health and Food SafetyBeijing 102209China

Obesity is a metabolic disorder due to over-accumulation of adipose tissue and ultimately becomes a“disease”.Brown adipose tissue(BAT)thermogenesis and white adipose tissue(WAT)browning emerge as a potential strategy of anti-obesity by dissipating energy as ***,drugs based on adipose tissue thermogenesis have not been successfully approved *** current study,we found that black tea extract(BTE)obtained by patentauthorized manufacturing process prevented body weight gain as novel thermogenic activator with reduction of adiposity,improvement of adipose distribution,and glucose metabolism improvement in diet-induced obesity ***,anti-obesity effect of BTE depends on promoting BAT thermogenesis and WAT browning with upregulation of uncoupling protein 1(UCP1),especially visceral adipose tissue(VAT)with browning ***,utilizing in silico approach of network pharmacology and molecular docking,we identified carbonic anhydrase 2(CA2)in nitrogen metabolism as anti-obesity target of BTE and further elucidated that protein kinase B(AKT)signaling pathway linked CA2 and *** gut microbiota regulation may prompt the CA2-dependent thermogenesis *** findings demonstrated anti-obesity effect of BTE as thermogenic activator through CA2-mediated BAT thermogenesis and WAT browning via CA2-AKT-UCP1 signaling pathway,which could be developed as promising anti-obesity agent with good safety and efficacy.

关键词： Obesity Black tea Thermogenesis Browning Adipose tissue

Analysis and suppression of operational overvoltage and inrush current for high-speed trains by automatic phase-switching technique

在线全文

学校读者我要写书评

暂无评论

High Voltage 2024年第3期9卷 733-748页

作者： Ye Cao Song Xiao Zhizong Ye Guangning Wu Yujun Guo Guoqiang Gao Chuanming Sun Jiancheng Liu Zheng Chen Hao Hou zijing wang Puyang Liu Yuhui Zhang Jie Yu School of Electrical Engineering Southwest Jiaotong UniversityChengduChina Guangdong Power Grid Limited Liability Company China Southern Power GridGuangzhouChina CRRC Qingdao Sifang Co. Ltd.QingdaoChina State Grid Chongqing Electric Power Company ChongqingChina

When a high-speed train approaches the insulated phase-splitting section embedded between neighbouring power supply arms,the vacuum circuit breaker(VCB)installed on trains must be disconnected to maintain the traction power supply system as a no-load condition for completing phase-switching action,as the train passes through the phase-splitting section depending on its ***,when operating VCBs,the arc is easily triggered between the mobile contacts inside,accompanied by an overvoltage ***,to explore the generating mechanism of inrush current and operational overvoltage,a model describing the‘substation-catenary-train’traction power supply system is launched based on an equivalent circuit modelling *** the analysis of the transient VCB operational process,the phase of catenary voltage is directly related to the characteristics of the VCB switching-on overvoltage,as the traction cur-rent's phase angle is relevant to the amplitude-frequency characteristics of the VCB switching-off *** current as a noteworthy element is related to the traction transformer's *** automatic phase-switching technique is utilised to suppress both operational overvoltage and inrush current,as the optimal combination of VCB switching-on and switching-off phases considering the balance between overvoltage and inrush current is achieved based on the particle swarm algorithm.

关键词： traction phase inrush

Study on Compound Stabilizer Formulation for Mango Juice with Skin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Biotechnology 2024年第1期13卷 78-83页

作者： Ziyi YANG Yurong wang Licheng LIU zijing wang Jiamei LIU College of Biomedicine and Chemical Engineering Liaoning Institute of Science and TechnologyBenxi 117004China

[Objectives]The effects of stabilizers such as sodium carboxymethyl cellulose,pectin,sodium alginate and xanthan gum on the stability of mango juice with skin were discussed using mango as the raw material.[Methods]The formula and stability of mango beverage with skin were studied using mango juice with skin as the raw *** stabilizers,including pectin,sodium alginate and sodium carboxymethyl cellulose,were added to improve the stability of the *** on single factor experiments and a response surface experiment,the stability model of mango juice was established to determine the best compound stabilizer.[Results]According to an orthogonal experiment on the stability of mango juice with skin,the optimum technical parameters were as follows:sodium carboxymethyl cellulose 0.20%,xanthan gum 0.08%,sodium alginate 0.18%,and pectin 0.14%,with which the optimal suspension stability was 69.12%.The optimum technical parameters from the response surface experiment were as follows:sodium carboxymethyl cellulose 0.199%,pectin 0.1185%,sodium alginate 0.163%,and xanthan gum 0.077%,with which the suspension stability was 70.32%.It was found that the stability of mango juice with skin obtained by the response surface experiment was better than that by the orthogonal experiment,and the order of factors affecting the stability of mango was sodium alginate(C)>sodium carboxymethyl cellulose(A)>pectin(D)>xanthan gum(B).[Conclusions]The formula of compound stabilizer for mango juice was optimized by the orthogonal experiment and the response surface method,providing a theoretical basis for the actual production of mango juice with skin.

关键词： Mango Stability of fruit juice Response surface experiment Optimization