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Effect of Co^(2+)substitution in B-sites of the perovskite system on the phase formation,microstructure,electrical and magnetic properties of Bi0.5(Na0.68K0.22Li0.10)0.5TiO3 ceramics

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1798-1808页

作者： Pamornnarumol Bhupaijit Chonnarong Kaewsai Tawat Suriwong Supree Pinitsoontorn Surirat Yotthuan Naratip Vittayakorn Theerachai Bongkarn Department of Physics Faculty of ScienceNaresuan UniversityPhitsanulok 65000Thailand School of Renewable Energy and Smart Grid Technology Naresuan UniversityPhitsanulok 65000Thailand Research Center for academic Excellence in Applied Physics Faculty of ScienceNaresuan UniversityPhitsanulok 65000Thailand Institute of Nanomaterials Research and innovation for Energy(IN-RIE) Khon Kaen UniversityKhon Kaen 40002Thailand Department of Chemistry School of ScienceKing Mongkut's Institute of Technology LadkrabangBangkok 10520Thailand

Bi_(0.5)(Na_(0.68)K_(0.22)Li_(0.10))_(0.5)Ti_(1-x)Co_(x)O_(3) lead-free perovskite ceramics(BNKLT-xCo,x=0,0.005,0.010,0.015 and 0.020)were fabricated via the solid-state combustion technique.A small-amount of Co^(2+)ion substitution into Ti-sites led to modification of the phase formation,microstructure,electrical and magnetic properties of BNKLT *** rhombohedral and tetragonal phases were observed in all samples using the X-ray diffraction(XRD)*** Rietveld refinement revealed that the rhombohedral phase increased from 39%to 88%when x increased from 0 to *** average grain size increased when x *** increasing x,more oxygen vacancies were generated,leading to asymmetry in the bipolar strain(S-E)hysteresis *** the composition of x=0.010,a high dielectric constant(ε_(m))of 5384 and a large strain(S_(max))of 0.23%with the normalized strain (d*_(33))of 460 pm·V^(-1) were *** BNKLT-0Co ceramic showed diamagnetic behavior but all of the BNKLT-xCo ceramics exhibited paramagnetic behavior,measured at 50 K.

关键词： BNKLT-xCo dielectric ferroelectric strain magnetic

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GSDME as an executioner of chemotherapy-induced cell death

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Science China(Life Sciences) 2017年第11期60卷 1291-1294页

作者： Xiaoliang Yu Sudan He Cyrus Tang Hematology Center and Collaborative innovation Center of Hematology Jiangsu Institute of Hematology Soochow University

Cell death is a crucial process required for development, tissue homeostasis, and pathological cell loss in multicellu- lar organisms. Cell death mainly occurs in two alternative modes： apoptosis or necrosis. Apoptosis is a form of pro- grammed cell death with typical morphological features, including cell shrinkage, chromatin condensation, and DNA fragmentation （Degterev and Yuan, 2008）. The dying cell is eventually fragmented into membrane-bound apoptotic bodies that are engulfed by surrounding phagocytes.

关键词： GSDME executioner chemotherapy-induced cell death

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Evaluation of a multidisciplinary global health online course in Mexico

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Global Health Research and Policy 2020年第1期5卷 76-86页

作者： Héctor Carrasco Patricia Fuentes Itzel Eguiluz Cesar Lucio-Ramírez Sandra Cárdenas Ilse Mariana Leyva Barrera Manuel Pérez-Jiménez Tecnológico de Monterrey Escuela de Medicina y Ciencias de la SaludMonterreyMexico History of Science and Global Health and Health Policy Harvard UniversityCambridgeUSA Vice-Rectory of academic and Educational innovation Tecnológico de MonterreyMonterrey CampusMonterreyMexico

Background:Global Health Education(GHE)focuses on training proactive global citizens to tackle health challenges in an increasingly interconnected and interdependent *** show that health professionals in training have reported that GHE has improved their teamwork,responsiveness to contextual factors that impact health,and understanding of health systems;however,there is little research on the impact of GHE courses in undergraduate settings,especially in low and middle-income countries(LMICs).Methods:Our study analyzes a multidisciplinary online global health course at Tecnologico de Monterrey,Mé*** conducted a cross-sectional study with pre-and *** who took the multidisciplinary course of Global Health for Leaders in the Fall of 2019(n=153)and Spring of 2020(n=348)were selected for this *** a five-point Likert scale(strongly agree to strongly disagree),the survey assessed seven competencies as well as questions about course expectations,takeaways,and recommendations to improve the *** performed descriptive statistical analyses comparing the combined pre-tests(from Fall and Spring cohorts)to the combined ***’s exact test was used to compare the ***:Of the 501 pre-course surveys administered,456 responses were completed in the pre-course and 435 in the post-course(91%overall response rate).Only 8.7%of the respondents in the pre-course survey strongly agreed that they could describe fundamental aspects of global health such as the Millennium Development Goals or Sustainable Development Goals,in contrast to a 56%of the students who strongly agreed in the post-course survey(p<0.001).Similar differences were captured in understanding the global burden of disease,social determinants of health,the effects of globalization in health,health systems’goals and functions,and human rights.38%felt that the course helped them develop a more empathetic perception of the suffering of others experiencing global hea

关键词： Global Health Education Global Health LMICs Global Health training

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Promotional effect of cerium on nickel-containing mesoporous silica for carbon dioxide reforming of methane

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Science China Chemistry 2015年第1期58卷 148-155页

作者： Yingyi Fu Yanan Wu Wenjia Cai Bin Yue Heyong He Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Collaborative innovation Center of Chemistry for Energy Materials Fudan University

A series of Ce-promoted 6.7%Ni-containing mesoporous silica(Ce-Ni-Si O2)with varying Ce content(0.5%–4.8%)was prepared using the evaporation-induced self-assembly *** characterization results showed that Ce and Ni species were homogeneously incorporated into the mesoporous silica *** catalytic properties of these samples in the dry reforming of methane reaction revealed that the catalysts(e.g.,1.2%Ce-Ni-Si O2)containing highly dispersed small Ni particles exhibited excellent catalytic activity and long-term stability,which is attributed to the anchoring effect of the Ce and its ability to increase surface oxygen species concentration.

关键词： dry reforming Ce mesoporous silica anchoring effect

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Experts Gathered to Analysis the Core of Future Network Development

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China Communications 2016年第2期13卷 208-209页

作者： Jiangsu Future Networks innovation Institute Jiangsu Future Networks innovation Institute

Experts shared their opinions about current construction and development trend of future network during the forum through kinds of activities including keynote speeches。

关键词：网络建设专家齐聚发展趋势网络时代经济发展网络形式网络架构

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Spin pumping through magnetic impurity effect

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Chinese Physics B 2015年第8期24卷 513-516页

作者：邓伟胤盛利邢定钰 National Laboratory of Solid State Microstructures and Department of Physics Nanjing University Collaborative innovation Center of Advanced Microstructures Nanjing University

We propose a simple adiabatic quantum spin pump to generate pure spin current. The spin pump is driven by an ac gate voltage and a time-dependent magnetic impurity potential. It is found that the total pumped spin per cycle exhibits oscillations, whose magnitude decays exponentially with changing strength of the impurity potential. The proposed method may be useful for spintronic applications.

关键词： pumping pure spin current magnetic impurity

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Variation of soil enzyme activity and microbial biomass in poplar plantations of different genotypes and stem spacings

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Journal of Forestry Research 2018年第4期29卷 958-967页

作者： Ye Li Liping Zhang Shengzuo Fang Ye Tian Jiao Guo College of Forestry Nanjing Forestry University Co-innovation Center for Sustainable Forestry in Southern China Nanjing Forestry University

To improve the productivity of poplar planta- tions, a field experiment of split-plot design with four tree spacings and three poplar clones was established, and four soil enzyme activities and microbial biomass were monitored in the trial. Soil enzyme activities, in most cases, were significantly higher in topsoil （0-10 cm） than in lower horizons （10-20 cm）. Soil cellulase, catalase and protease activities during the growing season were higher than during the non-growing season, while invertase activity followed the opposite trend. Soil invertase, cellulase and catalase activities varied by poplar clone but soil protease activity did not. Cellulase and protease activities in the plantation at 5 × 5 m spacing were significantly higher than in the other spacings. The highest catalase activity was recorded at 6 × 6 m spacing. At the same planting density, invertase activity was greater in square spacings than in rectangular spacings. Soil microbial biomass was also significantly affected by seedling spacing and poplar clone. The mean soil MBC was significantly lower in topsoil than in the lower horizon, while MBN showed the opposite pattern. Significantly positive correlations were observed among soil cellulase, protease and catalase activities （p 〈0.01）, whereas soil invertase activity was negatively and significantly correlated with cellulase, protease and catalase activities （p 〈 0.01）. Soil microbial biomass and enzyme activities were not correlated except for a significantly negative correlation between soil MBC and catalase activities. Variations in soil enzyme activity and microbial biomass in different poplar plantations suggest that genotype and planting spacing should be considered when modeling soil nutrient dynamics and managing for long-term site productivity.

关键词： Microbial activity Nutrient availability Planting density Poplar clone Seasonal variation

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Micropropagation of Pinus densiflora and the evaluation of nematode resistance of regenerated microshoots in vitro

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Journal of Forestry Research 2019年第2期30卷 519-528页

作者： Lihua Zhu Xiaofang Chu Tingyu Sun Jianren Ye Xiaoqin Wu Institute of Forest Protection College of Forest Nanjing Forestry University Co-innovation Center for Sustainable Forestry in Southern China

To accelerate the breeding and selection of Pinus densiflora Siebold and Zucc. resistance to pine wilt disease, a micropropagation system was established and nematode resistance evaluated in vitro. Cotyledon-hypocotyl explants from 28-day-old seedlings were first cultured on Gresshoff and Doy medium supplemented with 4.0 mg L^(-1) 6-benzyladenine and 0.2 mg L^(-1) a-naphthaleneacetic acid(NAA) to stimulate the formation of buds. Induced buds were subsequently subcultured on Gupta and Durzan medium supplemented with 0.1%(w/v)activated charcoal for elongation. Stem sections derived from shoots were used as explants for the further multiplication. Roots were formed from shoots transferred to woody plant medium containing 0.2 mg L^(-1) NAA for4 weeks. The nematode resistance test showed that symptoms in micropropagated shoots after infection with pine wood nematode(PWN) were similar to those in plants infected in the field. The wilting rate varied from 20 to100% among different clones 18 days after *** most susceptible clone was Clone 6-4 with a 100%wilting rate, while Clone 8-4 showed a relatively high resistance with a 20% wilting rate. The number of nematodes recovered from Clone 8-4 shoots was significantly lower(P = 0.05) than from Clones 5-10 and 16-4. This work contributes to the breeding of PWN resistance in ***.

关键词： Pinus densiflora Micropropagation Shoot proliferation Bursaphelenchus xylophilus Nematode resistance

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Atomic-scale insight into the epitaxial growth mechanism and interfacial coupling of BNT film prepared by hydrothermal synthesis

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Journal of Materials Science & Technology 2023年第33期164卷 198-204页

作者： Fujun Chen Hao Qian Xiaoyuan Sun Tianyang Zheng Yunfei Liu Jin Luo Yinong Lyu The State Key Laboratory of Materials-Oriented Chemical Engineering College of Materials Science and EngineeringNanjing Tech UniversityNanjing 210009China Jiangsu National Synergetic innovation Center for Advanced Materials (SICAM) Nanjing 210009China Jiangsu Collaborative innovation Center for Advanced Inorganic Function Composites Nanjing 210009China

Revealing the epitaxial growth mechanism and the interfacial coupling effect between oxide films will help to build a“structure-property”bridge for the design of microelectronic ***,the epitaxial growth mechanism and the interfacial coupling in Bi_(0.5)Na_(0.5)TiO_(3)/SrTiO_(3)(BNT/STO)heterointerfaces are investigated by the aberration-corrected scanning transmission electron microscopy,which is synthesized by a hydrothermal *** results illustrate that 4 mol/L NaOH leads to not only the epitaxial growth of the BNT film but also the mutual diffusion of *** uneven distribution of local elements in BNT films is observed and confirmed to impact the cation displacements of B-site and lattice ***,the overall trend of B-site cation displacement at the BNT/STO heterointerfaces is dominated by the interfacial ***,the oxygen octahedral tilt exhibits continuous tilt patterns of a^(0)a^(0)a^(0)-a−b^(0)c−-a^(0)a^(0)c−-a^(0)b−c−-a−b−c−from the substrate to BNT film due to the constraint of the substrate and presents a strong correlation with cation *** results are helpful to understand the underlying atomic structures and physical properties of BNT epitaxial thin films.

关键词： Hydrothermal synthesis Growth mechanism Interfacial coupling AC-STEM Octahedral tilt

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Photosynthetic response of poplar leaves at different developmental phases to environmental factors

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Journal of Forestry Research 2017年第5期28卷 909-916页

作者： Qingqing Wu Yang Liu Shengzuo Fang Pingping Li College of Forestry Nanjing Forestry University Co-innovation Center for Sustainable Forestry in Southern China Nanjing Forestry University

With economic incentives and interests in fast-growing poplar trees for short-rotation production of fiber and veneer, many new poplar hybrids have been bred and planted in China, but how to match the new poplar clones to suitable sites and maintain their higher growth rates is still not very clear. In this study, the photosynthetic response of poplar leaves at various developmental stages during two seasons (summer and autumn) was explored and mechanistic models for the photosynthesis of poplar leaves at different developmental phases in response photosynthetic active radiation (PAR), temperature, and relatively humidity were established using the optimization software package 1st Opt. Mature poplar leaves in autumn had significantly higher photosynthetic capacity than leaves at other stages and seasons. Based on the models established for poplar leaves at different phases, the main limiting factors for photosynthesis at the research site were high PAR and temperature in the summer and low PAR in the autumn. Our results highlight the importance of selecting suitable sites, pruning and stand density control during the plantation development to maintain higher photosynthetic rates of poplar trees and to establish optimum cultivation patterns for various utilization of poplar plantations.

关键词： Leaf development Model Photosynthesis Poplar plantation

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