检索结果-南通市图书馆

Enhanced red luminescence of Ca_(3)Si_(2−x)M_(x)O_(7):Eu^(3+)(M=Al,P)phosphors via partial substitution of Si^(4+) for applications in white light-emitting diodes

引用

Rare Metals 2024年第2期43卷 736-748页

作者： Yu-Hao Ma Xi Gao wen-tao zhang Zhen-Rui Yang Zhou Zhao Chen Qu College of Materials and Chemistry and Chemical Engineering Chengdu University of TechnologyChengdu610059China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China International Advanced Energy Science Research and Education Center Graduate School of Energy ScienceKyoto UniversityYoshida-HonmachiKyoto606-8501Japan

A red-emitting phosphor Ca_(2.91)Si_(2)O_(7):0.09Eu^(3+) with partial Al^(3+)/P^(5+) substitution on Si^(4+) was synthesized via a simple solid-state method,and the effects of the introduction of the M^(3+/5+)(M=Al,P)ions on the crystal structure and photoluminescence performance of Ca_(2.91)Si_(2−x)M_(x)O_(7):0.09Eu^(3+) phosphors were investigated.The X-ray diffraction(XRD),energy-dispersive X-ray spectroscopy(EDS),and X-ray photoelectron spectroscopy(XPS)results revealed that the structure of Ca_(3)Si_(2)O_(7) remained the same after the introduction of Al^(3+) and P^(5+) ions.The characteristic emission of Eu^(3+)-doped Ca_(3)Si_(2−x)M_(x)O_(7) phosphors exhibited two main peaks at 617 nm(red)and 593 nm(orange)under excitation at 394 nm,which originated from the^(5)D_(0)→^(7)F_(2)and^(5)D_(0)→^(7)F_(1) electron transitions of Eu^(3+) ions.After the partial substitution of Al^(3+) and P^(5+),the red emission intensities of the Ca_(2.91)Si_(2)O_(7):0.09Eu^(3+) phosphors were significantly enhanced by 1.88-and 1.42-fold,respectively,which is attributed to the crystal-field effect around Eu^(3+).Meanwhile,the luminescence intensities of the Ca_(2.91)Si_(1.96)Al_(0.04)O_(7):0.09Eu^(3+) and Ca_(2.91)Si_(1.94)P_(0.06)O_(7):0.09Eu^(3+) phosphors at 210℃ were 79.36%and 77.53%of those at 30°C,respectively,indicating their excellent thermal stability.Moreover,the as-prepared Ca_(2.91)Si_(1.96)Al_(0.04)O_(7):0.09Eu^(3+)and Ca_(2.91)Si_(1.94)P_(0.06)O_(7):0.09Eu^(3+) red-emitting phosphors were combined with a near-ultraviolet chip of 395 nm to fabricate red-light-emitting diode(LED)and white(w)-LED devices with excellent chromaticity features.In summary,Al^(3+)/P^(5+)-substituted Ca_(2.91)Si_(2)O_(7):0.09Eu^(3+) can serve as red-emitting phosphors for applications in w-LEDs.

关键词： Ca_(3)Si_(2)O_(7) Red-emitting phosphor Structure substitution Luminescence enhancement Crystal-field effect White light-emitting diode

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application and mechanisms of Sanhua Decoction in the treatment of cerebral ischemia-reperfusion injury

引用

World Journal of Clinical Cases 2024年第4期12卷 688-699页

作者： Ya-Kuan Wang Huang Lin Shu-Rui Wang Ru-tao Bian Yang Tong wen-tao zhang Ying-Lin Cui Department of Encephalopathy The Second Clinical College of Henan University of Chinese MedicineZhengzhou 450000Henan ProvinceChina Department of Encephalopathy Henan Provincial Hospital of Integrated Chinese and Western MedicineZhengzhou 450000Henan ProvinceChina Department of Traditional Chinese Medicine Classics Henan Provincial Hospital of Traditional Chinese Medicine(The Second Affiliated Hospital of Henan University of Chinese Medicine)Zhengzhou 450000Henan ProvinceChina Department of Central Laboratory Zhengzhou Traditional Chinese Medicine HospitalZhengzhou 450000Henan ProvinceChina Department of Encephalopathy Henan Provincial Hospital of Traditional Chinese Medicine(The Second Affiliated Hospital of Henan University of Chinese Medicine)Zhengzhou 450000Henan ProvinceChina Famous Doctor Hall Henan Provincial Hospital of Traditional Chinese Medicine(The Second Affiliated Hospital of Henan University of Chinese Medicine)Zhengzhou 450000Henan ProvinceChina

Cerebral ischemia-reperfusion is a process in which the blood supply to the brain is temporarily interrupted and subsequently restored.However,it is highly likely to lead to further aggravation of pathological damage to ischemic tissues or the nervous system.,and has accordingly been a focus of extensive clinical research.As a traditional Chinese medicinal formulation,Sanhua Decoction has gradually gained importance in the treatment of cerebrovascular diseases.Its main constituents include Citrus aurantium,Magnolia officinalis,rhubarb,and Qiangwu,which are primarily used to regulate qi.In the treatment of neurological diseases,the therapeutic effects of the Sanhua Decoction are mediated via different pathways,including antioxidant,anti-inflammatory,and neurotransmitter regu-latory pathways,as well as through the protection of nerve cells and a reduction in cerebral edema.Among the studies conducted to date,many have found that the application of Sanhua Decoction in the treatment of neurological diseases has clear therapeutic effects.In addition,as a natural treatment,the Sanhua Decoction has received widespread attention,given that it is safer and more effective than traditional Western medicines.Consequently,research on the mechanisms of action and efficacy of the Sanhua Decoctions in the treatment of cerebral ischemia-reperfusion injury is of considerable significance.In this paper,we describe the pathogenesis of cerebral ischemia-reperfusion injury and review the current status of its treatment to examine the therapeutic mechanisms of action of the Sanhua Decoction.We hope that the findings of the research presented herein will contribute to a better understanding of the efficacy of this formulation in the treatment of cerebral ischemia-reperfusion,and provide a scientific basis for its application in clinical practice.

关键词： Sanhua Decoction Cerebral ischemia-reperfusion Mechanism of action Application progress Traditional Chinese medical science Review

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Senktide blocks aberrant RTN3 interactome to retard memory decline and tau pathology in social isolated Alzheimer’s disease mice

引用

Protein & Cell 2024年第4期15卷 261-284页

作者： He-Zhou Huang wen-Qing Ai Na Wei Ling-Shuang Zhu Zhi-Qiang Liu Chao-wen Zhou Man-Fei Deng wen-tao zhang Jia-Chen zhang Chun-Qing Yang Ya-Zhuo Hu Zhi-tao Han Hong-Hong zhang Jian-Jun Jia Jing Wang Fang-Fang Liu Ke Li Qi Xu Mei Yuan Hengye Man Ziyuan Guo Youming Lu Kai Shu Ling-Qiang Zhu Dan Liu Department of Pathophysiology School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Medical Genetics School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Pathology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450002China Department of Pathology School of Basic MedicineZhengzhou UniversityZhengzhou 450002China The Second Affiliated Hospital Department of NeurologyHengyang Medical SchoolUniversity of South ChinaHengyang 421001China Beijing Key Laboratory of Aging and Geriatrics National Clinical Research Center for Geriatric DiseaseInstitute of GeriatricsChinese PLA General Hospital and Chinese PLA Medical AcademyBeijing 100853China Department of Neurosurgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Neurology Union HospitalHuazhong University of Science and TechnologyWuhan 430022China Department of Biology Boston UniversityBostonMA 02215USA Center for Stem Cell and Organoid Medicine(CuSTOM) Division of Developmental BiologyCincinnati Children’s Hospital Medical CenterCincinnatiOH 45229USA

Sporadic or late-onset Alzheimer’s disease(LOAD)accounts for more than 95%of Alzheimer’s disease(AD)cases without any family history.Although genome-wide association studies have identified associated risk genes and loci for LOAD,numerous studies suggest that many adverse environmental factors,such as social isolation,are associated with an increased risk of dementia.However,the underlying mechanisms of social isolation in AD progression remain elusive.In the current study,we found that 7 days of social isolation could trigger pattern separation impairments and presynaptic abnormalities of the mossy fibre-CA3 circuit in AD mice.We also revealed that social isolation disrupted histone acetylation and resulted in the downregulation of 2 dentate gyrus(DG)-enriched miRNAs,which simultaneously target reticulon 3(RTN3),an endoplasmic reticulum protein that aggregates in presynaptic regions to disturb the formation of functional mossy fibre boutons(MFBs)by recruiting multiple mitochondrial and vesicle-related proteins.Interestingly,the aggregation of RTN3 also recruits the PP2A B subunits to suppress PP2A activity and induce tau hyperphosphorylation,which,in turn,further elevates RTN3 and forms a vicious cycle.Finally,using an artificial intelligence-assisted molecular docking approach,we determined that senktide,a selective agonist of neurokinin3 receptors(NK3R),could reduce the binding of RTN3 with its partners.Moreover,application of senktide in vivo effectively restored DG circuit disorders in socially isolated AD mice.Taken together,our findings not only demonstrate the epigenetic regulatory mechanism underlying mossy fibre synaptic disorders orchestrated by social isolation and tau pathology but also reveal a novel potential therapeutic strategy for AD.

关键词： Alzheimer’s disease memory impairment synaptic disorder tau pathology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fe-based metallic glass as heterogeneous Fenton-like catalyst for azo dyes degradation:effect of inorganic anions

引用

Rare Metals 2023年第10期42卷 3443-3454页

作者： Ming-Jie Zhou wen-tao zhang Zhun Li tao Feng Si Lan Zhen Peng Shuang-Qin Chen Herbert Gleiter Institute of Nanoscience School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Shenzhen YNTECH Co. LtdShenzhen518118China School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China

Metallic glasses(MGs) are promising heterogeneous catalysts in water remediation,due to their superior efficiency,selectivity,reusability and corrosion resistance.However,few works are focused on the influence of inorganic anions that are abundant in wastewater.Herein,four common inorganic anions were added in a heterogeneous Fenton-like system(Fe-MG/H_(2)O_(2)) to study inorganic anions' influence on MGs' catalytic performance during methylene blue(MB) degradation.Evidence demonstrated that chloride ions and dihydrogen phosphate ions had an adverse effect on the catalytic performance of Fe-MG,whereas Fe-MG/H_(2)O_(2) system sustained high efficiency in the presence of sulfate ions and nitrate ions during the Fenton-like process.By studying the structure,surface morphology,and evolution of active species,it was found that inorganic anions had a significant effect on the surface morphology of Fe-MG and the generation of active species.This work will provide essential references for MGs as heterogeneous catalysts in practical applications.

关键词： Fe-based metallic glass(Fe–MG) Inorganic anion Wastewater treatment Methylene blue(MB)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Natural history of sensory nerve recovery after cutaneous nerve injury following foot and ankle surgery

引用

Neural Regeneration Research 2015年第1期10卷 99-103页

作者： Lu Bai Yan-ni Han wen-tao zhang Wei Huang Hong-lei zhang Department of Sports Medicine Shenzhen Hospital of Peking University Department of Medical Ultrasonics Shenzhen Hospital of Peking University

Cutaneous nerve injury is the most common complication following foot and ankle surgery. However, clinical studies including long-term follow-up data after cutaneous nerve injury of the foot and ankle are lacking. In the current retrospective study, we analyzed the clinical data of 279 patients who underwent foot and ankle surgery. Subjects who suffered from apparent paresthesia in the cutaneous sensory nerve area after surgery were included in the study. Pa- tients received oral vitamin B^2 and methylcobalamin. We examined final follow-up data of 17 patients, including seven with sural nerve injury, five with superficial peroneal nerve injury, and five with plantar medial cutaneous nerve injury. We assessed nerve sensory function using the Medical Research Council Scale. Follow-up immediately, at 6 weeks, 3, 6 and 9 months, and 1 year after surgery demonstrated that sensory function was gradually restored in most patients within 6 months. However, recovery was slow at 9 months. There was no significant difference in sensory function between 9 months and 1 year after surgery. Painful neuromas occurred in four patients at 9 months to 1 year. The results demonstrated that the recovery of sensory func- tion in patients with various cutaneous nerve injuries after foot and ankle surgery required at least 6 months.

关键词： nerve regeneration natural history cutaneous nerve injury foot and ankle sural nerve superficial peroneal nerve medial plantar nerve neurosensory function neural regeneration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Process mineralogy of Dalucao rare earth ore and design of beneficiation process based on AMICS

引用

Rare Metals 2020年第8期39卷 959-966页

作者： Yu Jiao Ke-Hui Qiu Pei-Cong zhang Jun-Feng Li wen-tao zhang Xian-Fei Chen School of Materials and Chemistry and Chemical Engineering Chengdu University of TechnologyChengdu 610059China School of Science Xichang UniversityXichang 615000China Institute of Materials Science and Technology Chengdu University of TechnologyChengdu 610059China

The test results of the automated mineral identification and characterization system(AMICS),including the mineral composition,particle size distribution,dissemination state and degree of liberation of the target minerals,could be used to improve the beneficiation process.Taking the Dalucao rare earth ore located in Dechang,Sichuan Province,China(with an average content of 2.40 wt%)as the research object in this paper,the chemical composition,phase composition and dissemination state of the minerals were tested by AMICS,and the minerals of different fineness were ground.The concentrate yield,grade and recovery rate of the minerals of different fineness were compared through flotation tests.When the grinding lasted for 5 min and 82.60%of mineral grains passed through the-74-μm sieve,the yield,grade and recovery rate could reach 20.19%,8.75%and 73.64%,respectively(as the best grinding fineness),under the same flotation conditions.

关键词： Automated mineral identification and characterization system(AMICS) Bastnasite Dalucao Flotation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

In situ scattering study of multiscale structural evolution during liquid–liquid phase transition in Mg-based metallic glasses

引用

Rare Metals 2021年第11期40卷 3107-3116页

作者： Kang-Hua Li Jia-Cheng Ge Si-Nan Liu Shu Fu Zi-Xuan Yin wen-tao zhang Guo-Xing Chen Shao-Chong Wei Hua Ji tao Feng Qi Liu Xun-Li Wang Xiao-Bing Zuo Yang Ren Horst Hahn Si Lan Herbert Gleiter Institute of Nanoscience School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Suzhou Nuclear Power Research Institute Co. LtdSuzhou 215004China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Physics City University of Hong KongHong Kong 999077China Center for Neutron Scattering City University of Hong Kong Shenzhen Research InstituteShenzhen 518057China X-Ray Sciences Division Argonne National LaboratoryLemontIL 60439USA Institute of Nanotechnology Karlsruhe Institute of Technology(KIT)Eggenstein-Leopoldshafen 76344Germany

The glass-forming ability of Mg-Cu-Gd alloys could be significantly promoted with the addition of Ag.A calorimetric anomaly could be observed in the supercooled liquid region of the Mg-Cu-Ag-Gd metallic glass,indicating the occurrence of a liquid-state phase transition driven by entropy.However,the underlying mechanism of the polyamorphous phase transition remains unsettled.In the paper,in situ scattering techniques were employed to reveal multiscale structure evidence in a Mg65Cu15Ag10Gd10metallic glass with an anomalous exothermic peak upon heating.Resistivity measurements indicate a reentrant behavior for the Mg-Cu-Ag-Gd metallic glass in the anomalous exothermic peak temperature region during heating.In situ synchrotron diffraction results revealed that the local atomic structure tends to be ordered and loosely packed first,followed by reentering into the initial state upon heating.Moreover,time-resolved small-angle synchrotron X-ray scattering(SAXS) results show an increase in nanoscale heterogeneity first followed by a reentrant supercooled liquid behavior.A core-shell structure model has been used to fit the SAXS profiles when polyamorphous phase transition occurs.In contrast,there is no structure anomaly for the reference Mg-Cu-Gd alloy system.The detailed multiscale structural evidence suggests the occurrence of a liquid-liquid phase transition followed by a reentrant behavior in the MgCu-Ag-Gd metallic glass.Our results deepen the understanding of the structural origin of the glass-forming ability and shed light on the possibility of tuning the physical and mechanical properties by heat-treatment in the supercooled liquid region of Mg-based metallic glasses.

关键词： Metallic glasses Anomalous exothermal peak Polyamorphous transition Synchrotron scattering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of Cr Atoms Three-Dimensional Deposition Characteristics

引用

World Journal of Nano Science and Engineering 2011年第3期1卷 73-78页

作者： Hua-Lei Yang wen-tao zhang Jian Yang 桂林电子科技大学电子工程与自动化学院

The semi-classical model is used to simulate the three-dimensional trajectory and deposition distribution of the chromium atoms in the Gaussian laser standing wave field using the Runge-Kutta method, and then the three-dimensional deposition stripes are also given, besides, the effects of atomic beam divergence, chromatic aberration and spherical aberration on deposition structure are also analyzed.

关键词： Three-Dimensional Analysis Atom Deposition Cr Atoms Gaussian Laser Standing Wave Field

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ALKBH5 suppresses autophagic flux via N6-methyladenosine demethylation of ZKSCAN3 mRNA in acute pancreatitis

引用

World Journal of Gastroenterology 2024年第12期30卷 1764-1776页

作者： tao zhang Shuai Zhu Geng-wen Huang Department of General Surgery Xiangya HospitalCentral South UniversityChangsha 410005HunanChina. National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410005HunanChina.

BACKGROUND Increasing evidence has demonstrated that N6-methyladenosine(m6A)RNA modification plays an essential role in a wide range of pathological conditions.Impaired autophagy is a critical hallmark of acute pancreatitis(AP).AIM To explore the role of the m6A modification of ZKSCAN3 in the regulation of autophagy in AP.METHODS The AP mouse cell model was established by cerulein-treated mouse pancreatic acinar cells(MPC-83),and the results were confirmed by the levels of amylase and inflammatory factors.Autophagy activity was evaluated by specific identification of the autophagy-related microstructure and the expression of autophagy-related genes.ZKSCAN3 and ALKBH5 were knocked down to study the function in AP.A m6A RNA binding protein immunoprecipitation assay was used to study how the m6A modification of ZKSCAN3 mRNA is regulated by ALKBH.RESULTS The increased expression of amylase and inflammatory factors in the supernatant and the accumulation of autophagic vacuoles verified that the AP mouse cell model was established.The downregulation of LAMP2 and upregulation of LC3-II/I and SQSTM1 demonstrated that autophagy was impaired in AP.The expression of ZKSCAN3 was upregulated in AP.Inhibition of ZKSCAN3 increased the expression of LAMP2 and decreased the expression of the inflammatory factors,LC3-II/I and SQSTM1.Furthermore,ALKBH5 was upregulated in AP.Knockdown of ALKBH5 downregulated ZKSCAN3 expression and restored decreased autophagic flux in AP.Notably,the bioinformatic analysis revealed 23 potential m6A modification sites on ZKSCAN3 mRNA.The m6A modification of ZKSCAN3 mRNA was significantly decreased in AP.Knockdown of ALKBH5 increased the modification of ZKSCAN3 mRNA,which confirmed that ALKBH5 upregulated ZKSCAN3 expression in a m6A-dependent manner.CONCLUSION ALKBH5 inhibits autophagic flux through m6A demethylation of ZKSCAN3 mRNA in AP,thereby aggravating the severity of the disease.

关键词： Acute pancreatitis Autophagy ZKSCAN3 N6-methyladenosine ALKBH5

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Close-packed layer spacing as a practical guideline for structure symmetry manipulation of IV-VI/I-V-VI_(2) thermoelectrics

引用

InfoMat 2024年第2期6卷 99-106页

作者： tao Jin Long Yang Xinyue zhang wen Li Yanzhong Pei Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji UniversityShanghaithe People's Republic of China

The crystal-structure symmetry in real space can be inherited in the reciprocal space,making high-symmetry materials the top candidates for thermoelectrics due to their potential for significant electronic band degeneracy.A practical indicator that can quantitatively describe structural changes would help facilitate the advanced thermoelectric material design.In face-centered cubic structures,the spatial environment of the same crystallographic plane family is isotropic,such that the distances between the close-packed layers can be derived from the atomic distances within the layers.Inspired by this,the relationship between inter-and intra-layer geometric information can be used to compare crystal structures with their desired cubic symmetry.The close-packed layer spacing was found to be a practical guideline of crystal structure symmetry in IV-VI chalcogenides and I-V-VI_(2) ternary semiconductors,both of which are historically important thermoelectrics.The continuous structural evolution toward high symmetry can be described by the layer spacing when temperature or/and composition change,which is demonstrated by a series of pristine and alloyed thermoelectric materials in this work.The layerspacing-based guideline provides a quantitative pathway for manipulating crystal structures to improve the electrical and thermal properties of thermoelectric materials.

关键词： phase transition structure manipulation thermoelectric materials x-ray diffraction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：