检索结果-南通市图书馆

Structural and magnetic properties of ZnFe_2O_4 films deposited by low sputtering power

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2012年第10期19卷 964-968页

作者： jin-long li Zhong Yu Ke Sun Xiao-na Jiang Zhong-wen Lan State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China No. 24 Research Institute of China Electronics Technology Group Corporation Chongqing 400060 China

To validate the correctness of the Hartman-Perdok Theory （HPT）, which indicates that the { 111 } planes have the lowest surface energy in spinel ferrites, the {111} plane orientated ZnFe204 thin films on Si（100）, Si（111）, and SIO2（500 nm）/Si（111） substrates were obtained through a radio frequency （RF） magnetron sputtering method with a low sputtering power of 80 W. All of the experiments prove that the atom energy determined by sputtering power plays an important role in the orientated growth of the ZnFe204 thin films, and it matches well with HPT. The ZnFe2O4 thin films exhibit ferromagnetism with a magnetization of 84.25 ld/mol at room temperature, which is different from the bulk counterpart （antiferromagnetic as usual）. The ZnFe204 thin films can be used as high-quality oriented inducing buffer layers for other spinel （Ni, Mn）Zn ferrite thin films and may have high potential in magnetic thin films-based devices.

关键词： thin films magnetron sputtering crystal orientation film growth surface energy ferromagnetism

Tribological properties in seawater for Ti/TiCN coatings on Ti6Al4V alloy by arc ion plating with different carbon contents

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2017年第11期36卷 858-864页

作者： jin-long li Gang-Yi Cai Hua-Sheng Zhong Yong-Xin Wang Jian-Min Chen Key Laboratory of Marine Materials and Application Technologies Zhejiang Key Laboratory of Marine Materials and Protection Technologies Ningbo Institute of Materials Technologies and Engineering Chinese Academy of Sciences School of Mechanical and Electrical Engineering Henan University of Technology

TiCN coatings incorporated with Ti buffer layer were deposited on Ti6A14V alloy by arc ion plating. The carbon content in TiCN coatings was varied by controlling flow rates of C2H2 in reactive gas. The Ti/TiCN coatings have a typical structure of columnar crystal with a total thickness of about 2 pro. The elements of Ti, C and N are present as TiN and TiC in TiCN coatings. A little free carbon appears with carbon content increasing in TiCN coatings. For the TiCN coatings, the hardness, friction coefficient and wear rate decrease with the increase in carbon content. In seawater, both friction coefficient and wear rate have an obvious decrease at lower carbon content compared with those in atmosphere. However, the friction coefficient and wear rate only have a slight decrease, while the carbon content reaches or exceeds 10 at% in Ti/TiCN coatings.

关键词： Ti/TiCN coatings Arc ion plating Hardness Seawater Wear

Nano-selenium alleviates cadmium-induced cerebellar injury by activating metal regulatory transcription factor 1 mediated metal response

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2022年第4期11卷 402-412页

作者： Shao-Shuai Bi Milton Talukder Hai-Tao jin Mei-Wei Lv jing Ge Cong Zhang jin-long li College of Veterinary Medicine Northeast Agricultural UniversityHarbin 150030China College of Biotechnology and Pharmaceutical Engineering of West Anhui University Lu’an 237012China Department of Physiology and Pharmacology Faculty of Animal Science and Veterinary MedicinePatuakhali Science and Technology UniversityBarishal8210Bangladesh Quality and Safety Institute of Agricultural Products Heilongjiang Academy of Agricultural SciencesHarbin 150010China College of Veterinary Medicine Henan Agricultural UniversityZhengzhou 450002China Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment Northeast Agricultural UniversityHarbin 150030China Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine Northeast Agricultural UniversityHarbin 150030China

This study aims to investigate the role of metal regulatory transcription factor 1(MTF1)-mediated metal response in cadmium(Cd)-induced cerebellar injury,and to evaluate the antagonistic effects of nanoselenium(Nano-Se)against Cd toxicity.A total of 80 chicks(1 d old,male,Hy-line Variety White)were randomly allocated to 4 treatment groups for 3 months:the control group(fed with a basic diet,n=20),the Nano-Se group(basic diet with 1 mg/kg nano-Se 1 mg/kg Nano-Se in basic diet,n=20),the NanoSe+Cd group(basic diet with 1 mg/kg Nano-Se and 140 mg/kg Cd Cl_(2),n=20)and the Cd group(basic diet with 140 mg/kg Cd Cl_(2),n=20).The results of the experiment showed that the Purkinje cells were significantly decreased with their degradation and indistinct nucleoli after Cd ***,exposure to Cd caused a significant accumulation of Cd and ***,the contents of Se,iron,and zinc were decreased,thereby disturbing the metal homeostasis in the *** Cd exposure also resulted in high levels of malondialdehyde(MDA)and down regulation of selenoprotein ***,the expressions of MTF1,metallothionein 1(MT1),MT2,zinc transporter 3(ZNT3),ZNT5,ZNT10,zrt,irt-like protein 8(ZIP8),ZIP10,transferrin(TF),ferroportin 1(FPN1),ATPase copper transporting beta(ATP7B),and copper uptake protein 1(CTR1)were inhibited by Cd ***,all these changes were significantly alleviated by the supplementation of *** study proved that Cd could disorder metal homeostasis and induce oxidative stress,whereas Nano-Se could relieve all these negative effects caused by Cd via activating the MTF1-mediated metal response in the cerebellum of chicken.

关键词： Nano-selenium Cadmium Selenoprotein transcriptome MTF1-mediated metal response Cerebellar injury

Essential oils improve nursery pigs'performance and appetite via modulation of intestinal health and microbiota

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2024年第1期16卷 174-188页

作者： Bi-Chen Zhao Tian-Hao Wang Jian Chen Bai-Hao Qiu Ya-Ru Xu jin-long li College of Veterinary Medicine Northeast Agricultural UniversityHarbin150030China Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine Northeast Agricultural UniversityHarbin150030China Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment Northeast Agricultural UniversityHarbin150030China

Optimal intestinal health and functionality are essential for animal health and performance,and simultaneously intestinal nutrient transporters and intestinal peptides are also involved in appetite and feed intake control *** the potential of essential oil(EO)in improving animal performance and improving feed palatability,we hypothesized that dietary supplementation of cinnamaldehyde and carvacrol could improve performance and appetite of nursery pigs by modulating intestinal health and ***(100 mg/kg),carvacrol(100 mg/kg),and their mixtures(including 50 mg/kg cinnamaldehyde and 50 mg/kg carvacrol)were supplemented into the diets of 240 nursery pigs for 42 d,and data related to performance were ***,the influence of EO on intestinal health,appetite and gut microbiota and their correlations were *** supplementation increased(Plity and local *** terms of intestinal development and the mucus barrier,EO promoted intestinal development and increased(P<0.05)the number of goblet ***,we found that piglets in the EO-supplemented group had upregulated(P<0.05)levels of transporters and digestive enzymes in the intestine,which were significantly associated with daily gain and feed *** addition,EO supplementation somewhat improved appetite in nursery pigs,increased the diversity of the gut microbiome and the abundance of beneficial bacteria,and there was a correlation between altered bacterial structure and appetite-related *** findings indicate that EO is effective in promoting growth performance and nutrient absorption as well as in regulating appetite by improving intestinal health and ba

关键词： Nursery pig Essential oil Intestinal health Appetite Microbiota

Surgical mortality in patients with malignant obstructive jaundice: a multivariate discriminant analysis

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2003年第3期2卷 435-440页

作者： Xi-Chun Han jin-long li Gang Han the Department of Surgery, Second Hospital, Jilin University, Changchun 130041, China Department of Surgery Second Hospital Jilin University Changchun 130041 China. hanchun601@***

OBJECTIVE: To estimate the operative mortality in patients with malignant obstructive jaundice. METHODS: Twelve risk factors were analyzed using multivariate discriminant analysis in 90 patients who had been operated on. RESULTS: Operative mortality was significantly related to the following factors: age, duration of jaundice, packed RBC volume, white blood cell count and concentration of blood urine nitrogen; it was not significantly related to diseases and types of operation. The following formula was obtained: packed RBC volume×0.09954-age×0. 04018-blood urine nitrogen×0. 23693-duration of jaundice× 2. 07388-WBC count×0. 21118+5. 26593. With this formula, an operative mortality of 77. 8% was predicted. CONCLUSION: With a positive value from the formula, the patient should be operated on; otherwise non-operative treatment is advocated.

关键词： malignant obstructive jaundice postoperative mortality multivariate discriminant analysis

Methanol-induced luminescence vapochromism based on a Sb^(3+)-doped organic indium halide hybrid

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2022年第7期65卷 1876-1881页

作者： Cui-Mi Shi jin-long li liang-jin Xu Yue Wu Hong-li Xuan jin-Yun Wang Zhong-Ning Chen College of Chemistry Fuzhou UniversityFuzhou 350108China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Ion doping has been demonstrated as a practical approach to achieving highly efficient luminescence in both inorganic phosphors and organic-inorganic *** asformed doping species show great potential in optoelectronic applications due to their high photoluminescence quantum yield(PLQY)and excellent ***,we report highly emissive Sb^(3+)-doped indium halides(C_(6)H_(18)N_(2))InCl_(5)·H_(2)O:Sb(C_(6)H_(18)N_(2)^(2+)=N,N,N',N'-tetramethylethane-1,2-diammonium)prepared by solution evaporation methods with an emission that peaked at 565 nm and a PLQY of 74.6%.Photophysical characterizations and density functional theory computational studies verify the broadband emission originating from a self-trapped ***,a drastic red shift of the emission peak from 565 to 663 nm with yellow luminescence turning to red is observed once the(C_(6)H_(18)N_(2))InCl_(5)·H_(2)O:Sb hybrid is exposed to methanol ***,when the methanol-exposed hybrid is put in air,the emission reverts to 565 nm in several ***-crystal X-ray diffraction studies show a subsequent structure distortion upon the coordination of methanol to the Sb(III)center,which is responsible for the drastic red shift of the ***,we found that(C_(6)H_(18)N_(2))InCl_(5)·H_(2)O:Sb exhibits a specific response to methanol vapor after screening a series of volatile organic compounds with different ***,a negligible change of the emission intensity is observed after several cycles of uptaking and releasing *** high fatigue resistance and specific solvent response of the Sb^(3+)-doped indium halide make it a very promising methanol detector.

关键词： organic metal halide hybrid Sb^(3+) doped self-trapped exciton emission luminescence vapochromism

Breakdown voltage enhancement in GaN channel and AlGaN channel HEMTs using large gate metal height

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第2期29卷 420-424页

作者： Zhong-Xu Wang lin Du Jun-Wei liu Ying Wang Yun Jiang Si-Wei Ji Shi-Wei Dong Wei-Wei Chen Xiao-Hong Tan jin-long li Xiao-Jun li Sheng-Lei Zhao jin-Cheng Zhang Yue Hao Key Laboratory for Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian UniversityXi'an 710071China Shanghai Precision Metrology and Testing Research Institute Shanghai 201109China China Academy of Space Technology(Xi'an) Xi'an 710000China Sichuan Institute of Solid-State Circuits CETCChongqing 400060China

A large gate metal height technique is proposed to enhance breakdown voltage in GaN channel and AlGaN channel high-electron-mobility-transistors(HEMTs).For GaN channel HEMTs with gate-drain spacing LGD=2.5μm,the breakdown voltage VBR increases from 518 V to 582 V by increasing gate metal height h from 0.2μm to 0.4μ*** GaN channel HEMTs with LGD=7μm,VBR increases from 953 V to 1310 V by increasing h from 0.8μm to 1.6μ*** breakdown voltage enhancement results from the increase of the gate sidewall capacitance and depletion region *** Al0.4Ga0.6N channel HEMT with LGD=7μm,VBR increases from 1535 V to 1763 V by increasing h from 0.8μm to 1.6μm,resulting in a high average breakdown electric field of 2.51 MV/*** and analysis indicate that the high gate metal height is an effective method to enhance breakdown voltage in GaN-based HEMTs,and this method can be utilized in all the lateral semiconductor devices.

关键词： GaN channel HEMTs AlGaN channel HEMTs breakdown voltage gate metal height

Local magnetic moment oscillation around an Anderson impurity on graphene

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai li Zhen Ma jin-Hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

Enhancement of leaching of cobalt and lithium from spent lithium-ion batteries by mechanochemical process

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2022年第4期32卷 1325-1335页

作者： li-li QU Ya-qun HE Yuan-peng FU Wei-ning XIE Cui-ling YE Qi-chang LU jin-long li Jia-hao li Zhi-bo PANG School of Chemical Engineering China University of Mining and TechnologyXuzhou 221116China Advanced Analysis and Computation Center China University of Mining and TechnologyXuzhou 221116China

A mechanochemical method with SiO_(2)as the grinding aid was used to enhance the leaching efficiencies of Co and li from spent lithium batteries(liBs).Experiment results show that the optimal leaching efficiencies of 94.91%for Co and 97.22%for li were obtained under the parameters of SiO_(2)/liCoO_(2)mass ratio of 1:1,grinding speed of 500 r/min and grinding time of 30 min in citric *** results indicate that the surficial properties of liCoO_(2)were changed after mechanochemical grinding treatment due to the newly generated surfaces on liCoO_(2).Meanwhile,the incompletely coordinated atomic structure and defective lattice structure lead to the activation of liCoO_(2).The reduction effect of carbon black on Co^(3+)under the action of mechanical forces increases its leaching efficiencies in the citric acid *** proposed process was found efficiently to recover Co and li from liCoO_(2).

关键词： mechanochemical grinding leaching spent lithium-ion batteries surficial properties reaction mechanism