期刊文献+
共找到21篇文章
< 1 2 >
每页显示 20 50 100
Nitrogen, Phosphorus, and Potassium Interactive Effects for Improving Drought Resistance on Mung Bean Varieties
1
作者 Zhichao Yin Yuhua He +3 位作者 yurong zhang Wenyun Guo Xiangli Xie Fengxiang Yin 《American Journal of Plant Sciences》 CAS 2024年第9期777-795,共19页
The planting areas of mung bean are mostly arid and semi-arid areas, and lack of irrigation conditions. Many studies have reported that fertilization can increase drought resistance. In our previous research, optimize... The planting areas of mung bean are mostly arid and semi-arid areas, and lack of irrigation conditions. Many studies have reported that fertilization can increase drought resistance. In our previous research, optimized nitrogen (N), phosphorus (P) and potassium (K) combined fertilization model was established in mung bean. In the present study, the optimal fertilization was conducted in pot trails, and mung bean varieties Bailv9 and Bailv11 were used as materials, while the four water regimes, and three fertilization ratios of F120 (optimal fertilization), F100 (conventional fertilization), F50 (half of conventional fertilization) treatments were set, to compare each fertilization ratio effects and non-fertilization condition under each water regimes respectively. Under different water conditions, the investigation of N, P, and K effects of optimal fertilization showed that the yield of Bailv9 was not sensitive to water stress and had strong drought resistance;their water sensitivity index and drought resistance coefficient were BaiLv9 as Di = 0.89 and DC = 0.79. The yield of Bailv11 was sensitive to water stress, and their drought resistance was weak;their water sensitivity index and drought resistance coefficient were BL11 Di = 1.76 DC = 0.59, and under different water treatment conditions, Bailv9 and Bailv11 all had the best yield and other related traits increase in the F120 fertilization mode compared with other fertilization and non-fertilization conditions, and the average yield increases were 31.56% and 28.08%, respectively. The pot trails conduct the drought stress treatments in mung bean varieties Bailv9, Bailv11, Bailv935 and Bailv985 to determine the function of NPK optimized fertilization for improving plants growth in drought stress condition. Compared with the mung bean varieties treated with F50, F100, and F120, the yield of Bailv9 increased by 56.20%, 81.27%, and 107.22%, respectively;compared with that of F0, the yield of Bailv11 increased by 10.18%, 19.42%, and 45.88%, respectively;Bailv935 increased by 26.52%, 61.90%, 74.16% respectively, and Bailv985 increased by 23.78%, 56.92%, 87.62% respectively. The significant performances of optimized fertilization were also verified in 20 mung bean varieties in our filed trails. The research establishes a theoretical basis for introducing the model into production practice in the next step. 展开更多
关键词 Mung Bean Water Sensitivity Fertilization Sensitivity Optimal Fertilization Drought Improvement
下载PDF
Analysis of the Current Situation of Drug Clinical Trial Institutions in Shaanxi Province
2
作者 yurong zhang Qi zhang +4 位作者 Li Wang Rui Xu Lili Zhao Enze Li Xin Wang 《Journal of Clinical and Nursing Research》 2024年第1期78-87,共10页
To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on... To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on the“Announcement on the Accreditation of Drug Clinical Trial Institutions”issued by the National Medical Products Administration from 2005 to August 2022,the record management information system of drug and medical device clinical trial institutions,and the drug clinical trial registration and information publicity platform.A retrospective analysis was carried out in terms of institutional development,regional distribution,registered majors,principal investigators,and the number of drug clinical trials.After the implementation of institution registration,the number of drug clinical trial institutions in Shaanxi Province increased by 47.4%,884 principal investigators were registered,the number of registered majors expanded from 58 qualified to 117,and the professional scope increased by 50.4%.The policy of institution registration is conducive to promoting the rational use of medical resources and the development of drug clinical trial institutions and improving the healthy development of the pharmaceutical industry in Shaanxi Province. 展开更多
关键词 Drug clinical trial Institution registration Registered majors Current situation analysis Professional group Shaanxi Province
下载PDF
Study of Quality Standards of Xiao’er Qingre Enema Preparation in Hospitals
3
作者 Ruizhong Wang yurong zhang +3 位作者 Junjun Mao Shaoli Liang Yan Wu Lin Chen 《Journal of Clinical and Nursing Research》 2024年第1期125-132,共8页
Objective:To establish the quality standards for the preparation of Xiao’er Qingre enema in hospitals.Method:Thin-layer chromatography(TLC)was used to identify Radix Isatidis and Glycyrrhizae in the prescription.The ... Objective:To establish the quality standards for the preparation of Xiao’er Qingre enema in hospitals.Method:Thin-layer chromatography(TLC)was used to identify Radix Isatidis and Glycyrrhizae in the prescription.The content of(R,S)-Goitrin was determined by high-performance liquid chromatography(HPLC).Results:In TLC identification,there was no interference between the negative controls of Radix Isatidis and glycyrrhizae,and the spots were well-separated.The HPLC results of(R,S)-Goitrin showed a good linear relationship between the peak area and concentration within the range of 0.476-95.2μg·mL-1(r=0.9999).Conclusion:The TLC and HPLC methods established in this experiment are simple,reproducible,and specific,making them suitable for the quality control Xiao’er Qingre enema preparation in hospitals. 展开更多
关键词 Xiao’er Qingre enema (R S)-Goitrin TLC HPLC Content determination
下载PDF
All-climate aqueous supercapacitor enabled by a deep eutectic solvent electrolyte based on salt hydrate 被引量:4
4
作者 Xudong Bu yurong zhang +4 位作者 Yinglun Sun Lijun Su Jianing Meng Xionggang Lu Xingbin Yan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第10期198-204,共7页
Aqueous supercapacitors(SCs)have received considerable attention owing to the utilization of low-cost,non-flammable,and low-toxicity aqueous electrolytes thus could eliminate the safety and cost concerns,but their wid... Aqueous supercapacitors(SCs)have received considerable attention owing to the utilization of low-cost,non-flammable,and low-toxicity aqueous electrolytes thus could eliminate the safety and cost concerns,but their wide temperature range applications have generally suffered from frozen of electrolyte and insufficient ionic conductivity at low temperatures.Herein,we demonstrate the feasibility of using an unconventional Deep Eutectic Solvent(DES)based on H2O-Mg(ClO4)2·6 H2O binary system as electrolyte to construct all-climate aqueous carbon-based SC.This unconventional class DES completely base on inorganic substances and achieving simply mix inexpensive salts and water together at the right proportions.Attributed to the attractive feature of extremely low freeze temperature of-69℃,this electrolyte can enable the 1.8 V carbon-based SC to fully work at-40℃with outstanding cycling stability.This DES electrolyte comprising of a single salt and a single solvent without any additive will open up an avenue for developing simple and green electrolytes to construct all-climate SC. 展开更多
关键词 Deep eutectic solvent Salt hydrates Aqueous supercapacitor Aqueous electrolyte All-climate
下载PDF
无机化学及无机化学实验中的思政元素 被引量:34
5
作者 张玉荣 袁耀锋 《大学化学》 CAS 2021年第3期68-71,共4页
无机化学及无机化学实验是化学专业学生最先接触到的专业基础课。本文梳理了这两门课程中专业知识与思政元素的结合点,并着重从培养学生的思辨精神和科学发展观、社会责任感和担当及"爱国、敬业、诚信、友善"的价值观这三方... 无机化学及无机化学实验是化学专业学生最先接触到的专业基础课。本文梳理了这两门课程中专业知识与思政元素的结合点,并着重从培养学生的思辨精神和科学发展观、社会责任感和担当及"爱国、敬业、诚信、友善"的价值观这三方面来说明课程思政在育人中的重要性。 展开更多
关键词 无机化学 无机化学实验 课程思政
下载PDF
在无机化学教学中培养学生的创新思维 被引量:11
6
作者 张玉荣 林森 袁耀锋 《大学化学》 CAS 2020年第8期13-16,共4页
根据无机化学授课对象的特点,结合无机化学教学心得,分别以水的电化学稳定窗口、配位化学的发展史及铝离子浓度的测定为例,讲述了科学研究、化学史、实践与教学内容相结合对提高教学效果、培养学生创新思维的作用。
关键词 无机化学 课堂教学 创新思维
下载PDF
Survey of Knowledge Graph Approaches and Applications 被引量:5
7
作者 Hangjun Zhou Tingting Shen +3 位作者 Xinglian Liu yurong zhang Peng Guo Jianjun zhang 《Journal on Artificial Intelligence》 2020年第2期89-101,共13页
With the advent of the era of big data,knowledge engineering has received extensive attention.How to extract useful knowledge from massive data is the key to big data analysis.Knowledge graph technology is an importan... With the advent of the era of big data,knowledge engineering has received extensive attention.How to extract useful knowledge from massive data is the key to big data analysis.Knowledge graph technology is an important part of artificial intelligence,which provides a method to extract structured knowledge from massive texts and images,and has broad application prospects.The knowledge base with semantic processing capability and open interconnection ability can be used to generate application value in intelligent information services such as intelligent search,intelligent question answering and personalized recommendation.Although knowledge graph has been applied to various systems,the basic theory and application technology still need further research.On the basis of comprehensively expounding the definition and architecture of knowledge graph,this paper reviews the key technologies of knowledge graph construction,including the research progress of four core technologies such as knowledge extraction technology,knowledge representation technology,knowledge fusion technology and knowledge reasoning technology,as well as some typical applications.Finally,the future development direction and challenges of the knowledge graph are prospected. 展开更多
关键词 Knowledge graph semantic search intelligent question answering intelligent recommendation FINANCE
下载PDF
Assessing the Effectiveness of Montelukast Sodium in Managing Pulmonary Infections in Lung Cancer Patients 被引量:1
8
作者 Rui Xu Li Wang +2 位作者 Zhuan Huang yurong zhang Lingjuan Huang 《Proceedings of Anticancer Research》 2023年第6期128-135,共8页
Objective:To investigate the efficacy of montelukast sodium in the treatment of lung cancer patients with pulmonary infections.Methods:A total of 330 patients diagnosed with lung cancer and pulmonary infection,who wer... Objective:To investigate the efficacy of montelukast sodium in the treatment of lung cancer patients with pulmonary infections.Methods:A total of 330 patients diagnosed with lung cancer and pulmonary infection,who were admitted to the First Affiliated Hospital of Xi’an Medical University from 2020 to 2022,were selected as research subjects.They were randomly divided into two groups:a control group receiving conventional treatment and an observation group receiving conventional treatment combined with montelukast sodium.Each group consisted of 165 cases.The time required for clinical symptom improvement,the resolution of lung infection signs,and the levels of serum inflammatory factors before and after treatment were compared between the two groups.Results:The observation group exhibited significantly faster improvement in clinical symptoms compared to the control group(P<0.001).ELISA assays were conducted to detect the expression levels of IL-1β,IL-6,IL-8,and TNF-αin the serum of both groups at 1 week and 2 weeks into the treatment.The results indicated that,as the treatment progressed,the observation group displayed significantly lower levels of the four serum inflammatory factors compared to the control group(P<0.001).Conclusion:Montelukast sodium demonstrates efficacy in the treatment of patients with lung cancer complicated by pulmonary infections.These findings suggest its potential for further verification and clinical application. 展开更多
关键词 Lung cancer Pulmonary infections Montelukast sodium Clinical symptoms Inflammatory factors
下载PDF
Status and Analysis of 832 Investigator-Initiated Coronavirus-Related Clinical Studies
9
作者 yurong zhang Li Wang +2 位作者 Ruizhong Wang zhang Qi Rui Xu 《Journal of Clinical and Nursing Research》 2023年第6期124-130,共7页
Objective:To contribute to the development of clinical research on novel coronavirus by analyzing the clinical research data of COVID-19.Methods:Searches were performed on the database of“National Health Insurance In... Objective:To contribute to the development of clinical research on novel coronavirus by analyzing the clinical research data of COVID-19.Methods:Searches were performed on the database of“National Health Insurance Information Platform Medical Research Registration Information System”using the keywords“COVID-19”and“Novel coronavirus.”The search was performed till 31 December 2022.This paper presents a statistical analysis of the status quo of the registered projects in terms of the number of registered projects,the types of projects,the levels of the institutions,the types of research,the intervention measures,the research design,the main objectives of the research,and so on.Results:A total of 823 investigator-initiated clinical studies of COVID-19 were documented,and the number of studies registered peaked on December 31,2020,and December 31,2022.Among them,there were 819 items from general medical research(99.5%),812 items from medical institutions(98.7%),and 713 items from Medical Grade III,and Class A hospitals(86.6%).Among these items,534(64.9%)were observational studies.The most common intervention method used was administering existing drugs,with 140 studies utilizing them.This data analysis also included 128 case-control studies and 247 treatment-oriented studies.Conclusion:Researchers in local medical institutions have been actively carrying out clinical research related to COVID-19.However,they should refer to registered research to avoid duplicate research. 展开更多
关键词 Investigator-initiated Clinical research COVID-19 Data analysis
下载PDF
A Meta-Analysis on the Correlation Between Herpes Simplex Virus Type II Infection and Adverse Pregnancy Outcomes in China
10
作者 Li Wang yurong zhang Xin Wang 《Journal of Clinical and Nursing Research》 2023年第1期44-54,共11页
Objective:To systematically evaluate the relationship between herpes simplex virus type II(HSV-2)infection in pregnant women and the adverse pregnancy outcomes(preterm delivery,spontaneous abortion,stillbirth,monstrum... Objective:To systematically evaluate the relationship between herpes simplex virus type II(HSV-2)infection in pregnant women and the adverse pregnancy outcomes(preterm delivery,spontaneous abortion,stillbirth,monstrum,low birth weight,intrauterine growth retardation,premature rupture of membranes),so as to provide clinical guidance for the prevention and treatment of adverse pregnancy outcomes caused by HSV-2 infection in pregnant women.Methods:2140 articles were collected from PubMed,China National Knowledge Infrastructure(CNKI),and other databases for the past 20 years.According to the inclusion criteria,the literatures about the relationship between HSV-2 infection of pregnant women and adverse pregnancy outcomes were screened.The effect model was determined by heterogeneity test results,and the meta-analysis was carried out by RevMan 5.3 software.Results:The results of meta-analysis showed that the positive rate of HSV-2 was higher in the adverse pregnancy group than in the control group(odds ratio[OR]:7.92,95%confidence interval[Cl]:3.91-16.01),and the difference was statistically significant.Conclusion:HSV-2 infection will increase the risk of adverse pregnancy outcomes.Prevention and effective control of HSV-2 infection in early pregnancy can reduce the rate of adverse pregnancy outcome,which is of great significance to the promotion of eugenics. 展开更多
关键词 Herpes simplex virus type II Adverse pregnancy outcomes META-ANALYSIS
下载PDF
张玉荣老师治疗继发性闭经的经验
11
作者 苏伦高娃 阿如那 张玉荣 《中国蒙医药(蒙)》 2023年第3期111-114,共4页
下载PDF
简述苏格木勒——7临床应用
12
作者 阿如那 何花 张玉荣 《中国蒙医药(蒙)》 2023年第5期102-108,共7页
下载PDF
Fish Skin-Inspired Janus Hydrogel Coating for Drag Reduction
13
作者 yurong zhang Lijun Li +8 位作者 Ruteng Wang Junwei Liu Zhen Lin Gang Li Hongtao Liu Yifeng Lei Yunhe Xiong Yan Zhao Longjian Xue 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第8期867-872,共6页
Comprehensive Summary,In nature,fishes have evolved functional skins with effective hydrodynamic performance and anti-fouling,facilitating predation and escaping from predators.Although a large number of fish scale-in... Comprehensive Summary,In nature,fishes have evolved functional skins with effective hydrodynamic performance and anti-fouling,facilitating predation and escaping from predators.Although a large number of fish scale-inspired structured surfaces have been explored,the incorporation of mucus on the structured surfaces has been largely ignored.Inspired by the skin of Osteichthyes fishes,a Janus hydrogel coating(JHC)is successfully prepared by a two-step UV light irradiation at room temperature.The bottom side of JHC(STH)achieves a shear adhesive strength of 103.3±17.5 kPa and can strongly adhere to a large variety of surfaces,including metals,ceramic and polymers.The top surface of JHC(SLH)replicates the structure of cycloid scales,while the nature of hydrogel mimics the mucus on fish skin.SLH possesses prominent mechanical,anti-swelling,anti-fouling and drag reduction properties.The design strategy for JHC has potential applications in numerous fields,like,pipeline transportation,bioengineering,and shipping industry. 展开更多
关键词 Fish skin-inspired Artificial coating HYDROGEL Drag reduction ANTIBACTERIAL
原文传递
Hierarchically porous biochar derived from aerobic granular sludge for high-performance membrane capacitive deionization
14
作者 yurong zhang Xudong Bu +2 位作者 Yajun Wang Zhenyu Hang Zhiqiang Chen 《Environmental Science and Ecotechnology》 SCIE 2024年第1期100-108,共9页
Membrane capacitive deionization(MCDI)is a cost-effective desalination technique known for its low energy consumption.The performance of MCDI cells relies on the properties of electrode materials.Activated carbon is t... Membrane capacitive deionization(MCDI)is a cost-effective desalination technique known for its low energy consumption.The performance of MCDI cells relies on the properties of electrode materials.Activated carbon is the most widely used electrode material.However,the capacitive carbon available on the market is often expensive.Here,we developed hierarchically porous biochar by combining carbonization and activation processes,using easily acquired aerobic granular sludge(AGS)from biological sewage treatment plants as a precursor.The biochar had a specific surface area of 1822.07 m^(2)g^(-1),with a micropore area ratio of 58.65%and a micropore volume of 0.576 cm3 g^(-1).The MCDI cell employing the biochar as electrodes demonstrated a specific adsorption capacity of 34.35 mg g^(-1),comparable to commercially available activated carbon electrodes.Our study presents a green and sustainable approach for preparing highly efficient,hierarchically porous biochar from AGS,offering great potential for enhanced performance in MCDI applications. 展开更多
关键词 Membrane capacitive deionization DESALINATION Aerobic granular sludge BIOCHAR Alkali activation
原文传递
一种用于非侵入式负荷分解的改进时域卷积网络
15
作者 张玉荣 薛怀琦 姚志远 《建模与仿真》 2024年第3期2623-2639,共17页
非侵入式负载监测(Non-Intrusive Load Monitoring)是通过监测用户电表的总用电量数据并应用负载分解算法,以获取各个电器实时用电量数据。然而,非侵入式负载分解作为一种单通道盲源分离问题,由于其固有的无法识别性导致实现分解困难。... 非侵入式负载监测(Non-Intrusive Load Monitoring)是通过监测用户电表的总用电量数据并应用负载分解算法,以获取各个电器实时用电量数据。然而,非侵入式负载分解作为一种单通道盲源分离问题,由于其固有的无法识别性导致实现分解困难。深度学习逐渐成为解决NILM问题的主流方法,得益于可用的数据、计算能力和深度网络训练算法模型。其中,序列到点(seq2point)负荷分解模型(Zhang)实现了最先进的预测效果。利用TCN网络架构,使用双向扩张卷积结构代替因果卷积结构,扩大了网络的感受野,并使用非线性激活函数GELU和层标准化(LN)方法,通过残差连接的思想搭建了时域卷积网络模型。最后,在公共数据集UK-DALE上对算法进行了测试,并选择平均绝对误差和F-score作为主要评价指标来评估算法的性能。通过对比两种算法在相同周期数据集上的分解结果,发现基于TCN改进的模型,显著提高了负荷分解的性能指标。 展开更多
关键词 非侵入式负荷监测(NILM) Seq-to-Point (seq2point) 双向扩张卷积 TCN
原文传递
2-取代苯并噻唑化合物的合成进展 被引量:3
16
作者 张俊 刘雅菲 +2 位作者 张育榕 呼亮 韩世清 《有机化学》 SCIE CAS CSCD 北大核心 2021年第3期1053-1071,共19页
2-取代苯并噻唑在生物医药、材料科学等领域的应用和研究使其合成方法受到了广泛的关注.在传统合成方法的研究基础之上,单质硫介导的氧化还原反应和饱和化合物的脱氢芳构化反应等新方法的发展,为苯并噻唑衍生物的合成提供更多可能.此外... 2-取代苯并噻唑在生物医药、材料科学等领域的应用和研究使其合成方法受到了广泛的关注.在传统合成方法的研究基础之上,单质硫介导的氧化还原反应和饱和化合物的脱氢芳构化反应等新方法的发展,为苯并噻唑衍生物的合成提供更多可能.此外,近年来新型金属-有机骨架催化剂、组合离子液体/凝胶、超声以及微波辅助等的应用,极大地丰富了苯并噻唑衍生物的合成方式.综述了近年来2-取代苯并噻唑的合成方法. 展开更多
关键词 2-取代苯并噻唑 缩合 脱氢 氧化还原 芳基化 偶联环化
原文传递
Role of Elevated Thrombospondin-1 in Kainic Acid-Induced Status Epilepticus 被引量:2
17
作者 yurong zhang Mengdi zhang +8 位作者 Wei Zhu Xiaohong Pan Qiaoyun Wang Xue Gao Chaoyun Wang Xiuli zhang Yuxia Liu Shucui Li Hongliu Sun 《Neuroscience Bulletin》 SCIE CAS CSCD 2020年第3期263-276,共14页
Previous studies have suggested that thrombospondin-1(TSP-1) regulates the transforming growth factor beta 1(TGF-b1)/phosphorylated Smad2/3(p Smad2/3) pathway. Moreover, TSP-1 is closely associated with epilepsy. Howe... Previous studies have suggested that thrombospondin-1(TSP-1) regulates the transforming growth factor beta 1(TGF-b1)/phosphorylated Smad2/3(p Smad2/3) pathway. Moreover, TSP-1 is closely associated with epilepsy. However, the role of the TSP-1-regulated TGFb1/p Smad2/3 pathway in seizures remains unclear. In this study, changes in this pathway were assessed following kainic acid(KA)-induced status epilepticus(SE) in rats.The results showed that increases in the TSP-1/TGF-b1/p Smad2/3 levels spatially and temporally matched the increases in glial fibrillary acidic protein(GFAP)/chondroitin sulfate(CS56) levels following KA administration.Inhibition of TSP-1 expression by small interfering RNA or inhibition of TGF-b1 activation with a Leu-Ser-Lys-Leu peptide significantly reduced the severity of KA-induced acute seizures. These anti-seizure effects were accompanied by decreased GFAP/CS56 expression and Smad2/3 phosphorylation. Moreover, inhibiting Smad2/3 phosphorylation with ponatinib or SIS3 also significantly reduced seizure severity, alongside reducing GFAP/CS56 immunoreactivity. These results suggest that the TSP-1-regulated TGF-b1/p Smad2/3 pathway plays a key role in KA-induced SE and astrogliosis, and that inhibiting this pathway may be a potential anti-seizure strategy. 展开更多
关键词 ASTROGLIOSIS STATUS epilepticus PONATINIB Thrombospondin-1
原文传递
Correlation of chloride diffusion coefficient and microstructure parameters in concrete: A comparative analysis using NMR,MIP, and X-CT 被引量:2
18
作者 yurong zhang Shengxuan XU +3 位作者 Yanhong GAO Jie GUO Yinghui CAO Junzhi zhang 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2020年第6期1509-1519,共11页
Permeability is a major indicator of concrete durability,and depends primarily on the microstructure characteristics of concrete,including its porosity and pore size distribution.In this study,a variety of concrete sa... Permeability is a major indicator of concrete durability,and depends primarily on the microstructure characteristics of concrete,including its porosity and pore size distribution.In this study,a variety of concrete samples were prepared to investigate their microstructure characteristics via nuclear magnetic resonance(NMR),mercury intrusion porosimetry(MIP),and X-ray computed tomography(X-CT).Furthermore,the chloride diffusion coefficient of concrete was measured to explore its correlation with the microstructure of the concrete samples.Results show that the proportion of pores with diameters<1000 nm obtained by NMR exceeds that obtained by MIP,although the difference in the total porosity determined by both methods is minimal.X-CT measurements obtained a relatively small porosity;however,this likely reflcts the distribution of large pores more accurately.A strong correlation is observed between the chloride diffusion coefficient and the porosity or contributive porosity of pores with sizes<1000 nm.Moreover,microstructure parameters measured via NMR reveal a lower correlation coefficient R2 versus the chloride diffusion coefficient relative to the parameters determined via MIP,as NMR can measure non-connected as well as connected pores.In addition,when analyzing pores with sizes>50 um,X-CT obtains the maximal contributive porosity,followed by MIP and NMR. 展开更多
关键词 PERMEABILITY microstructure NMR MIP X-CT
原文传递
Interstitial nitrogen-induced efficiency alcohol oxidation over heterogeneous N–CoMn_(2)O_(4) catalyst under visible-light
19
作者 Hongwei Li yurong zhang +3 位作者 Jun Tang Guozheng Huang Ping Cui Qingping Ke 《Green Synthesis and Catalysis》 2023年第4期293-299,共7页
Developing highly efficient and recyclable photocatalysts through harvesting solar light as energy is crucial to oxidation for industrial implementation,especially for simple transition metal oxidic catalysts without ... Developing highly efficient and recyclable photocatalysts through harvesting solar light as energy is crucial to oxidation for industrial implementation,especially for simple transition metal oxidic catalysts without precious/heavy/rare metal dopants.Herein,we like to report the use of nitrogen-doped CoMn_(2)O_(4) oxide(N–CoMn_(2)O_(4))as a heterogeneous catalyst for efficient oxidation of various alcohols such as p/m/o-methyl-substituted aromatic alcohols,p-substituted aromatic alcohols including electron-donating and electron-withdrawing substituents,heterocycle-based alcohols and secondary aromatic alcohols to the corresponding aldehydes/ketones,under visible light(>420 nm)illumination and mild condition of oxygen as oxidant and room temperature.The relation of various Co-based oxides to their catalytic performance was studied.It is shown that the Co^(2+)species in N–CoMn_(2)O_(4),obviously increased by the doping of nitrogen,are acted as catalytic active species coupled with the synergistic effect between Co and Mn species for the enhanced visible-light selective oxidation of alcohols to aldehydes.A plausible catalytic mechanism is proposed basis of control experiments and published studies,which suggests that this oxidation process probably occurs on Co^(2+)þsites via an ionic reactive oxygen species pathway and ^(1)O2 and O2⋅^(-)species are the reactive oxygen species.This simple transition metal oxide-catalyzed aerobic oxidation provides a green alternative for the manufacture of aldehydes/ketones from alcohols. 展开更多
关键词 Interstitial nitrogen Alcohol oxidation Room temperature CoMn_(2)O_(4) VISIBLE-LIGHT
原文传递
Preventing HIV Epidemic in China:Policy Evolution and Coordination Mechanisms in the Past Four Decades
20
作者 Yanli Liu yurong zhang +5 位作者 Xiaoxin Xu Zhidi Deng Xiaobo Wang Duozhen Yuan Zelin Xue Xiulan zhang 《China CDC weekly》 SCIE CSCD 2023年第48期1084-1091,共8页
China has achieved commendable success in stabilizing human immunodeficiency virus(HIV)prevalence at a relatively low level of transmission(1).Nevertheless,the total number of people living with HIV in China rose to a... China has achieved commendable success in stabilizing human immunodeficiency virus(HIV)prevalence at a relatively low level of transmission(1).Nevertheless,the total number of people living with HIV in China rose to approximately 1.05 million,with cumulative reported acquired immune deficiency syndrome(AIDS)-related fatalities reaching 351,000 by the end of 2020(2).Since the initial infiltration of HIV into China in 1982(3),the nation has enacted over 471 national policies through 2021 to combat the epidemic.Initially,the outbreak was perceived primarily as a healthcare issue rather than the complex societal challenge that it manifested into.The Ministry of Health(MOH,now known as National Health Commission)was initially tasked with HIV prevention,issuing the nation’s first HIV/AIDS-related policy in 1984,which aimed to ban HIV-infected products and individuals from entry.Regrettably,this approach proved inadequate as significant HIV outbreaks unfolded.At this juncture,the State Council Research Office recognized the HIV epidemic as a grave societal and public health issue,posing a threat to the“Survival of the Chinese Nation”(4).Engagement at a higher governmental level became imperative to coordinate an effective response across diverse administrative agencies. 展开更多
关键词 PREVENTION initially primarily
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部