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玉米“适应性负效应”现象探讨——西南喀斯特石漠化成因新解

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怀化学院学报 2024年第3期43卷 26-33页

作者：杨成李秀英贵州民族大学贵州贵阳550025

南方的石漠化,北方的沙漠化,是困扰中国的两大生态环境问题。为探寻西南喀斯特石漠化的形成原因,利用文献法、参与式田野调查法以及经验实证法,梳理了近四十年来西南喀斯特石漠化形成的各种成因说,并以贵州为例,详细论述了石漠化形成的... 详细信息

南方的石漠化,北方的沙漠化,是困扰中国的两大生态环境问题。为探寻西南喀斯特石漠化的形成原因,利用文献法、参与式田野调查法以及经验实证法,梳理了近四十年来西南喀斯特石漠化形成的各种成因说,并以贵州为例,详细论述了石漠化形成的三个阶段,以及石漠化与玉米的关系。在此基础上揭示了玉米在石漠化地区存在“适应性负效应”,合理地解释了西南喀斯特石漠化形成原因。此观点的提出,可为西南喀斯特石漠化形成原因做出新的阐释,同时也可为西南石漠化治理提供理论支持与科学依据。

关键词：西南喀斯特石漠化成因玉米种植适应性负效应

“现代控制理论”线上线下混合教学模式改革与探索

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教育教学论坛 2024年第4期 148-152页

作者：李秀英马向华丁肇红上海应用技术大学电气与电子工程学院上海201418

探讨“现代控制理论”课程的线上线下混合教学模式,包括混合教学方式的建立与开展,以及持续改进的课程考核与评估机制的实施。构建线上线下紧密衔接的混合式教学,主要从三个方面着手:一是坚持以学生为中心,对课程内容进行梳理,选择合适... 详细信息

探讨“现代控制理论”课程的线上线下混合教学模式,包括混合教学方式的建立与开展,以及持续改进的课程考核与评估机制的实施。构建线上线下紧密衔接的混合式教学,主要从三个方面着手:一是坚持以学生为中心,对课程内容进行梳理,选择合适的形态;二是交叉设计,串联线上线下活动;三是将课程思政贯穿整个教学环节,构建恰当的学习路径,着重培养学生的能力。切实做到线上有资源、线下有活动、过程有评估,使教学效果得到提升。

关键词：线上线下混合教学模式现代控制理论教学改革

艾椒黄乳膏制备及对银屑病小鼠皮损的改善作用

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时珍国医国药 2024年第3期35卷 625-628页

作者：季新燕李秀英杨蓉赵焕新翟晓艳冀来喜杨李旺山西中医药大学基础医学院山西省现代中药工程实验室山西晋中030619

目的优化艾椒黄乳膏的制备工艺,观察其对银屑病小鼠皮损的改善作用。方法以硬脂醇、凡士林、月桂醇硫酸钠、甘油用量为考察对象,以外观性状和物理稳定性为评价指标,采用L_(9)(3^(4))表正交实验设计,优化艾椒黄乳膏的制备工艺,并以咪... 详细信息

目的优化艾椒黄乳膏的制备工艺,观察其对银屑病小鼠皮损的改善作用。方法以硬脂醇、凡士林、月桂醇硫酸钠、甘油用量为考察对象,以外观性状和物理稳定性为评价指标,采用L_(9)(3^(4))表正交实验设计,优化艾椒黄乳膏的制备工艺,并以咪喹莫特诱导的银屑病小鼠为模型,比较艾椒黄乳膏与艾椒黄洗剂对银屑病小鼠皮损面积和严重程度(psoriasis area and severity index, PASI)评分、皮肤病理变化、皮损处增殖细胞核抗原(proliferating cell nuclear antigen, PCNA)表达和皮损处皮肤IL-17和IL-23水平的影响。结果最佳处方为硬脂醇1.8g,凡士林2.0g,月桂醇硫酸钠0.15g,甘油0.575g。药效学实验表明,艾椒黄乳膏可使咪喹莫特诱导的银屑病小鼠皮损处皮肤变薄、炎症减轻,PCNA表达下降,皮损皮肤中IL-17和IL-23水平降低,相较于艾椒黄洗剂更优。结论该研究筛选的艾椒黄乳膏制备工艺稳定,乳膏质地细腻,便于携带,可明显改善银屑病小鼠皮肤的皮损现象。

关键词：艾椒黄乳膏银屑病咪喹莫特 PCNA IL-17 IL-23

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光催化产H_(2)O_(2)基本原理综述

吉林师范大学学报（自然科学版） 2024年第2期45卷 93-100页

作者：高林于楠寇金英李秀颖张兴晶任百祥吉林师范大学环境友好材料制备与应用教育部重点实验室吉林长春130103 吉林师范大学工程学院吉林四平136000 吉林师范大学化学学院吉林四平136000

光催化产H_(2)O_(2)使用太阳能作为能量来源,是一项很有发展前景的研究.光催化产H_(2)O_(2)的反应原理可以概括为:通过光的催化作用,发生O_(2)的还原反应以及H_(2)O的氧化反应,从而生成H_(2)O_(2).本文以ZnO、TiO_(2)、BiVO_(4)、CdS、... 详细信息

光催化产H_(2)O_(2)使用太阳能作为能量来源,是一项很有发展前景的研究.光催化产H_(2)O_(2)的反应原理可以概括为:通过光的催化作用,发生O_(2)的还原反应以及H_(2)O的氧化反应,从而生成H_(2)O_(2).本文以ZnO、TiO_(2)、BiVO_(4)、CdS、rGO、g-C_(3)N_(4)等可用于光催化产H_(2)O_(2)的材料为出发点,结合影响光催化活性的因素综述了光催化产H_(2)O_(2)的基本原理,并对该领域的发展进行了展望.

关键词：光催化 H_(2)O_(2) 半导体材料基本原理氧还原

Si_(3)N_(4)和BN对铕掺杂硼硅酸盐玻璃发光性能的影响

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中国陶瓷 2024年第7期60卷 7-12页

作者：崔久治孙心瑗陈润川杜文浩肖晓东吴妙春李秀英肖卓豪景德镇陶瓷大学材料科学与工程学院景德镇333403 井冈山大学数理学院吉安343009

铕离子在自然界中通常以Eu^(3+)存在,然而,铕离子单掺发光材料只有当Eu^(2+)和Eu^(3+)以合适浓度共存时才能实现白光发射。在还原气氛中制备铕掺杂硼硅酸盐玻璃时,很容易使得Eu^(3+)全部还原为Eu^(2+),因而很难获得Eu^(2+)和Eu^(3+)共... 详细信息

铕离子在自然界中通常以Eu^(3+)存在,然而,铕离子单掺发光材料只有当Eu^(2+)和Eu^(3+)以合适浓度共存时才能实现白光发射。在还原气氛中制备铕掺杂硼硅酸盐玻璃时,很容易使得Eu^(3+)全部还原为Eu^(2+),因而很难获得Eu^(2+)和Eu^(3+)共存的发光材料。在空气氛围的烧成条件下对比研究了还原剂Si_(3)N_(4)和BN对铕掺杂硼硅酸盐玻璃发光性能的影响。结果表明,Si_(3)N_(4)和BN都能够在空气氛围下实现硼硅酸盐玻璃中铕离子的部分还原,且Si_(3)N_(4)的还原能力比BN更强。当Si_(3)N_(4)替代达到5 mol%,铕掺杂硼硅酸盐玻璃样品中Eu^(2+)浓度占优势,其CIE坐标为(x=0.29,y=0.34),表明以Si_(3)N_(4)还原铕掺杂硼硅酸盐玻璃在白光照明用荧光材料领域具有显著的应用潜力。

关键词： Si_(3)N_(4) BN Eu 硼硅酸盐玻璃白光

Well-dispersed Sb particles embedded on N-doped carbon nanofibers toward high-performance li-ion battery

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Rare Metals 2024年第7期43卷 2994-3006页

作者： ying li Yi-Han Zhao Lu-Lu Zhao Peng-Fei Wang ying Xie Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China

The alloy-type material Sb is widely used in the anode materials of lithium-ion batteries(liBs)due to its high theoretical specific ***,its serious volume expansion problem during alloying/dealloying of li~+limits its practical *** this work,C-Sb composite was constructed as anode material of liBs by electrospinning route for the first time,Sb was introduced into the polyacrylonitrile-based hard carbon and coal tar pitch-based soft carbon composite amorphous carbon fiber with a diameter of 300-600 nm,which realized high cycling *** C-Sb-2(the mass ratio of polyacrylonitrile to Sb source is 1:2)electrode displayed charge capacities of 1098.5,930.3,841.7,753.5,643.9 and 545.8 mAh·g^(-1)at 0.1,0.2,0.3,0.5,1 and 2 A·g^(-1),*** when the current density returned to 0.1 A·g^(-1),the charge capacity was 939.3 mAh·g^(-1),revealing good stability and *** introduction of Sb into the amorphous carbon improved its conductivity and addressed the volume expansion issue of high specific capacity Sb during charge/***-situ XRD analysis confirmed the high reversibility of the C-Sb-2 during charging and *** functional theory(DFT)calculations revealed the gradual enhancement of the interface interaction between Sb_(x)li_(y) and amorphous carbon(AMC)with increasing lithium content,contributing to the anchoring of alloy nanoparticles on the AMC surface and buffering the volume change of the ***,the gradual lithiation of Sb facilitated the electron transfer from Sb_(x)li_(y) to *** findings hold promise for designing lithium storage materials with exceptional performance,highlighting the potential of C-Sb composites as anode materials for efficient next-generation lithium storage.

关键词： li-ion battery Metallic Sb Carbon Electrospinning Cycling stability

F-doped orthorhombic Nb_(2)O_(5) exposed with 97% (100) facet for fast reversible liþ-Intercalation

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Green Energy & Environment 2024年第4期9卷 723-731页

作者： Xiaodi liu Yufeng Tang Dan Zhang Guangyin liu Xinwei Luo Yi Shang xiu li Jianmin Ma College of Chemistry and Pharmaceutical Engineering Nanyang Normal UniversityNanyang473061China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China

Orthorhombic Nb_(2)O_(5)(T-Nb_(2)O_(5))is attractive for fast-charging li-ion batteries,but it is still hard to realize rapid charge transfer kinetics for li-ion ***,F-doped T-Nb_(2)O_(5) microﬂowers(F-Nb_(2)O_(5))are rationally synthesized through topotactic ***,F-Nb_(2)O_(5) are assembled by single-crystal nanoﬂakes with nearly 97%exposed(100)facet,which maximizes the exposure of the feasible li^(+)transport pathways along loosely packed 4g atomic layers to the electrolytes,thus effectively enhancing the li^(+)-intercalation ***,the band gap of F-Nb_(2)O_(5) is reduced to 2.87 eV due to the doping of F atoms,leading to enhanced electrical *** synergetic effects between tailored exposed crystal facets,F-doping,and ultrathin building blocks,speed up the li^(+)/electron transfer kinetics and improve the pseudocapacitive properties of F-Nb_(2)O_(5).Therefore,F-Nb_(2)O_(5) exhibit superior rate capability(210.8 and 164.9 mAh g^(-1) at 1 and 10 C,respectively)and good long-term 10 C cycling performance(132.7 mAh g^(-1) after 1500 cycles).

关键词： Exposed facets Orthorhombic Nb_(2)O_(5) F-doping Pseudocapacitive intercalation anode li-ion storage

Environmental risk for application of ammonia-soda white mud in soils in China

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Journal of Integrative Agriculture 2020年第3期19卷 601-611页

作者： WANG Xiao-bin YAN Xiang li xiu-ying Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

In recent years,some reports,mainly from Chinese research,show that there has been an increasing trend in the use of ammonia-soda residue(ASR)(or called ammonia-soda white mud) as a soil conditioner in *** to now,the studies on ASR have focused on its utilization for acid soil amendment in agriculture,but few studies have assessed its environmental *** contains pollutant elements such as mercury(Hg),cadmium(Cd),copper(Cu) and fluorine(F) and the purpose of this study was to review research on the environmental impacts of ASR application in *** obtained from 23 research reports indicate that the concentrations of Hg,Cd,Cu,F and Cl(0-170,0.01-2.8,4.5-200,2000-24700 and 1 600-188 000 mg kg^-1,respectively) in ASR may exceed the limits(≤0.5,≤0.3 and ≤50 mg kg^-1 for Hg,Cd and Cu,respectively) of Chinese Risk Screening Values for Soil Contamination of Agricultural Land(GB 15618-2018 2018) or the refereed critical value(≤800 and ≤200 mg kg^-1 for F and Cl,respectively) based on Chinese *** concentrations of the elements Hg,Cd,Cu,F and Cl in the leachate of ASR detected by the extraction tests also exceed the limits(Class IV-V) of the Chinese Standard for Groundwater Quality(GB/T 14848-2017 2017).Based on the above results,it is suggested that ASR without any pretreatment for reducing harmful pollutants should not be used for soil remediation or conditioning of farmlands,to ensure soil health,food safety and environmental quality.

关键词： environmental safety risk heavy metals industrial solid wastes ammonia-soda white mud ammonia-soda residue

Environmental risks for application of magnesium slag to soils in China

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Journal of Integrative Agriculture 2020年第7期19卷 1671-1679页

作者： WANG Xiao-bin YAN Xiang li xiu-ying Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China

Magnesium slag(MS)is one of the main industrial solid wastes produced by the magnesium *** the problem of its disposal has attracted much attention with increasing amounts of solid wastes generated in the production of metallic *** MS contains calcium(Ca),magnesium(Mg),and silicon(Si),some have tried to use MS as Si-Ca-Mg fertilizer or for soil amendment in ***,in the magnesium metallurgical process,some pollutant elements are introduced into MS,resulting in the enrichment of these pollutants in MS,such as arsenic(As),chromium(Cr),cadmium(Cd),mercury(Hg),copper(Cu),nickel(Ni),fluorine(F)and chlorine(CI).Research indicates that the enrichment of these pollutants can result in high levels,especially for Cd,Hg,Cu,Ni,F and CI(0-4,0-0.74,20-127,100-170,2277-14800 and 133-1000 mg kg1,respectively)in some MS in *** levels are often far beyond the limits(S0.3,s0.5,≤50 and≤60 mg·kg-1 for Cd,Hg,Cu and Ni,respectively)of the Chinese Risk Screening Values for Soil Contamination of Agricultural Land based on the Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land(GB 15618-2018)or the critical reference values(limits(Class IV-V)of the Chinese Standard for Groundwater Quality(GB/T 14848-2017).Based on the above results,it is suggested that without any pretreatment for reducing harmful pollutants MS should not be allowed to be applied for soil remediation or conditioning directly into farmlands in order to ensure soil health,food safety and environmental quality.

关键词： environmental safety risk heavy metals industrial solid wastes magnesium slag