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Site Preference of Alloying Elements in DO22-Ni3V Phase: Phase-Field and First-Principles Study
Ding-Ni Zhang,Qian-Qian Shangguan,Fu Liu,Ming-Yi Zhang 대한금속·재료학회 2015 METALS AND MATERIALS International Vol.21 No.4
Site preference of alloying elements in DO22-Ni3V phase was investigated using phase-field and first-principles method. The concentrations of alloying elements on sublattices of DO22-Ni3V phase were quantitatively studied using phase-field model based on microscopic diffusion equations. The phase-field computation results demonstrate that the concentration differences of alloying elements on the NiI and NiII site are attributed to the coordination environment difference. Host atoms Ni and substitutional ternary additions Al prefer to occupy NiI site. Antisite atoms V show site preference on the NiII site. Further reason of site preference of alloying elements on the two different Ni sites were studied using first-principles method to calculate the electronic structure of DO22-Ni3V phase. Calculation of density of states, orbitals population and charge population of the optimized Ni3V structure found that the electronic structures of NiI and NiII sites are different. Electronic structure difference, which is caused by coordination environment difference, is the essential reason for site selectivity behaviors of alloying elements on NiI and NiII sites.
Qing Ni,Li Sun,Ensi Cao,Wentao Hao,Yongjia Zhang,Lin Ju 한국물리학회 2020 Current Applied Physics Vol.20 No.9
(Li1+, Al3+) co-doped Ni0.5Zn0.5Fe2O4 ferrites, Ni0.5-xZn0.5-xLixAlxFe2O4 (x = 0.000, 0.025, 0.050 and 0.100), were synthesized by the sol-gel auto-combustion method. X-ray diffraction (XRD), field emission scanning electronic microscope (FESEM), vibrating sample magnetometer (VSM) and LCR meter were used to investigate the structural, magnetic and dielectric properties. Results of XRD and SEM indicate that both doping amount and calcination temperature play significant roles in crystal structure and grain growth. Also, it can be observed that the saturation magnetization and the coercivity change in a noticeable manner. The Ni0.475Zn0.475Li0.025Al0.025Fe2O4 ferrite sintered at 1200 °C has a relatively low coercivity value (62.93 Oe) and the largest saturation magnetization (110.95 emu/g). Besides, dielectric behavior is also improved by Li1+ and Al3+ co-doping
Metal-Doped In2O3 Nanosphere Arrays with Enhanced Gas-Sensing Property
Xuanji Zhang,Ni Deng,Xianjia Chen,Yanting Yang,Jing Li,BO HONG,DINGFENG JIN,Xiaoling Peng,XINQING WANG,Hongliang Ge,HONGXIAO JIN 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.3
In2O3 and metal-doped (Ni or Ce) In2O3 mesoporous three-dimensional (3D) nanospheres arrays were synthesized via nanocasting using mesoporous silica as hard templates. Effects of Ni or Ce doping on the structure, optical and gas-sensing properties of the In2O3 nanospheres were investigated. Both the undoped and the doped In2O3 nanospheres showed single-phase structure without any impurity. The nanospheres were about 20 nm in size and they stacked closely to formrigid 3D mesoporous structure. Achange in the value of optical band gap was observed upon metal doping. The room temperature photo luminescence behavior also showed some differences between pure and doped In2O3. Compared with pure In2O3 nanospheres, the metal-doped In2O3 exhibited superior response, fast recovery and good selectivity to ethanol. The enhanced gas-sensing properties might be related to the doping of metal ion and its effective contribution towards the oxygen vacancies, conductivity and crystallite size of the grains.
Yanxiu Zuo(Yanxiu Zuo),Junxiang Qian(Junxiang Qian),Lichi Li(Lichi Li),Zhangguan Ni(Zhangguan Ni),Jun Wu(Jun Wu),Huiyun Zhang(Huiyun Zhang),Yufu Chen(Yufu Chen),Huiyun Zhang(Huiyun Zhang),Li Yao(Yao L 아시아사회과학학회 2022 Jornal of Asia Social Science Vol.9 No.1
Baihua Village is a typical mountainous village in the southwest part of Lujiang county, Longyang District, Baoshan City, Yunnan Province. Residents there made a living on the land, including growing sugarcane and planting maize, whose annual income was no more than 2000 yuan before 2006. Since then when a research institute has set it as one of the pilot villages for mango growing impetus with sci-tech. For the sake of “One village and One Product”, mango breeding and relevant techniques have been applied to daily work. Within years, the developed model of has been explored: simply “villages are the main carriers facilitated by the specialized cooperative for mango growing, back-up by science and technology. Technical trainings serve as the driving force for the leading growers, meanwhile, sellers work as the bridge link the producing-end and the markets”.
Zhang, Tiemo,Ni, Yan,Zhang, Yizhou 한국문화산업학회 2022 문화산업연구 Vol.22 No.2
In recent years, the digital content industry which integrates creative culture and digital economy occupies an increasingly important position in the national economy and foreign trade. The progress of China's digital technology provides the basic conditions for the development of its digital content industry and the enhancement of its international competitiveness.This paper uses the trade performance evaluation method to conduct a longitudinal analysis of the changing trend of the international competitiveness of China's digital content industry from 2015 to 2018. At the same time, the import and export trade data of the digital content industry in the United States, Germany, France, the United Kingdom, Japan, South Korea, Singapore, India, Russia, Canada, and Australia in 2018 were selected to compare horizontally with the international competitiveness of China's digital content industry.The objects of evaluation in this article are communication and information services, audio-visual transactions and related services, other royalties and license fees, and educational services. The data comes from the United Nations Commodity Trade Statistics Database and the statistical data of "China Digital Industry Market Pattern and Investment Observation 2017-2018, 2019-2020". The evaluation indicators are International Market Share Index, Trade Competitive Index, Net Export Revealed Comparative Advantage index. The evaluation results show that although China's digital technology provides opportunities for the development of the digital content industry, China's digital content industry still faces great challenges and its international competitiveness is weak. The international competitiveness of China's digital content industry is showing a slow upward trend. The United States, Japan, and Germany have clear comparative advantages in the international competitiveness of digital content industries, and the digital content industries of South Korea, India, Russia, and Australia have their characteristics.
Zhang, Ran,Ni, Zhong-Hai,Zhang, Li-Fang,Kou, Hui-Zhong Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
A new tetranuclear Mn(III) complex $[Mn^{III}{_4}(sae)_4({\mu}_3-O)({\mu}_{1,1}-N_3)(OH)(H_2O)_2]{\cdot}H_2O$ (1) ($H_2sae$ = 2-salicylideneamino-1-ethanol) has been synthesized by the reaction of $MnCl_2{\cdot}4H_2O$, $H_2sae$ and sodium azide in the mixed solvent of methanol, acetonitrile and water. The X-ray diffraction analysis shows that the four Mn(III) ions in complex 1 have a unique adamantine arrangement, whereas the coordination environment of each Mn(III) ions is different. Magnetic studies indicate that complex 1 manifests antiferromagnetic behaviors. The magnetic susceptibilities of complex 1 have been fitted by two magnetic models based on the suitable analysis of its magnetic structural topology.
Zhang Ni,Jiang Jia,Song Yue-Hua 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.3
Two new species: A. (Arboridia) xiaotungensis sp. nov. and A. (Arboridia) luojiashangensis sp. nov. from Guizhou Province, China are described and illustrated. In addition, the appearances of A. reniformis Song & Li (2013a) and A. anteoculara Song & Li (2013a) are supplementarily described. A key to distinguish all known species of the genus from China is provided. LSID: https://www.zoobank.org/urn:lsid:zoobank.org:pub:3DD14108-ED08-430D-AE8D-CD0 FCC215A4E
Possible Epithelial Ovarian Cancer Association with HPV18 or HPV33 Infection
Zhang, Pei-Pei,Zhou, Lei,Cao, Jia-Shi,Li, Yi-Ping,Zeng, Zhi,Sun, Ni,Shen, Li,Zhu, Hao-Yue,Ruan, Yang,Zha, Wen-Ting,Wang, Xin-Yu,Zhang, Ke-Qiang,Zhang, Ran Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.6
The present study was conducted to investigate the prevalence of HPV infection in epithelial ovarian cancer (EOC) in Hunan province. DNA samples were collected from paraffin embedded ovarian tissue from 322 patients with EOC, 99 with ovarian benign tumors and 199 normal persons. The polymerase chain reaction and direct sequencing were used to identify the HPV types in the samples. The relationship between the infection of human papillomavirus (HPV) and the epithelial ovarian carcinoma (EOC) was investigated combined with clinical data. The prevalence of HPV18 and HPV33 in EOC group and benign group was higher than in the normal group. HPV18 and HPV33 may play a role in the development of both EOC and ovarian benign tumor and may participate in the development of EOC with traditional risk factors, family history and abortion, possibly exerting synergistic effects.
Zhang, Daopeng,Zhang, Lifang,Zhao, Zengdian,Ni, Zhonghai Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Two pyridinecarboxamide cobalt dicyanide building blocks and Mn(III) compounds have been employed to assemble cyanide-bridged heterometallic complexes, resulting in three trinuclear cyanide-bridged $Co^{III}-Mn^{II}$ complexes: $\{[Mn(MeOH)_4][Co(bpb)(CN)_2]_2\}{\cdot}2MeOH{\cdot}2H_2O$ (1), $\{[Mn(MeOH)_4][Co(bpmb)(CN)_2]_2\}{\cdot}2MeOH{\cdot}2H_2O$ (2) and $\{[Mn(DMF)_2(en)_2][Co(bpb)(CN)_2]_2\}{\cdot}2DMF{\cdot}H_2O$ (3) ($bpb^{2-}$ = 1,2-bis(pyridine-2-carboxamido)benzenate, $bpmb^{2-}$ = 1,2-bis(pyridine-2-carboxamido)-4-methyl-benzenate, en = ethylenediamine). Single crystal X-ray diffraction analysis shows their similar sandwich-like structures, in which the two cyanide-containing building blocks act as monodentate ligands through one of their two cyanide groups to coordinate the Mn(II) center. For complex 3, it was further linked into one-dimensional structure by ethylenediamine acting as bridges. Investigation of the magnetic properties of complex 3 reveals weak antiferromagnetic coupling between the neighboring Mn(II) centers through the bridging ethylenediamine molecule. A best-fit to the magnetic susceptibilities of complex 3 gave the magnetic coupling constant J = -0.073(2) $cm^{-1}$.
Zhang, Zhen,He, Xujun,Xu, Ji,Zhang, Genhua,Yang, Yue,Ma, Jie,Sun, Yuanshui,Ni, Haibin,Wang, Fengyong The Korean Gastric Cancer Association 2020 Journal of gastric cancer Vol.20 No.2
Purpose: miR-205 is a tumor suppressor and plays an important role in tumor invasiveness. However, the role of miR-205 in human gastric cancer (GC) epithelial-mesenchymal transition (EMT) remains unclear. The aim of this study was to investigate the molecular mechanism of miR-205 in the regulation of EMT in GC invasion. Materials and Methods: Quantitative polymerase chain reaction (qPCR) was used to detect the expression of miR-205 in GC. Further, the correlation between the pathological parameters and prognosis of GC was statistically analyzed. A transwell model was used to evaluate the effect of miR-205-3p on the invasion and migration of GC cells. qPCR, western blotting, and luciferase assay were performed to analyze the relationship and target effects between miR-205-3p and the expression of zinc finger electron box binding homologous box 1 (ZEB1) and 2 (ZEB2). Results: We found that the levels of miR-205-3p were significantly lower (P<0.05) in GC tissues than in matched normal tissues. Additionally, the expression of miR-205-3p was related to the tumor invasion depth, lymph node metastasis, lymph node invasion, and tumor, node, metastasis stage. Patients with lower miR-205-3p expression levels in the tumors had a poorer prognosis. The in vitro assays indicated that miR-205-3p could affect the invasion ability and EMT of GC cells by targeting the expression of both ZEB1 and ZEB2. Conclusions: miR-205-3p promotes GC progression and affects the prognosis of patients by targeting both ZEB1 and ZEB2 to directly influence EMT.