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等腰直角三角形光阱中的电子束手性衍射辐射

物理学报 2022年第24期71卷 376-382页

作者：刘志鑫党郅博方哲宇北京大学物理学院人工微结构和介观物理国家重点实验室北京100871

电子束衍射辐射源具有体积小、波长可调和极化可控等优点,在纳米光子电路中显示出巨大的应用潜力.这里展示了等腰直角三角形光阱纳米结构中电子束衍射辐射的光学手性现象,可以获得手性度高于40%的衍射辐射信号,光学手性的状态能被有效调... 详细信息

电子束衍射辐射源具有体积小、波长可调和极化可控等优点,在纳米光子电路中显示出巨大的应用潜力.这里展示了等腰直角三角形光阱纳米结构中电子束衍射辐射的光学手性现象,可以获得手性度高于40%的衍射辐射信号,光学手性的状态能被有效调控,甚至可以实现手性的反转.通过详细分析体系中的真空电磁模式和电荷分布的动态变化,为这种手性光学效应的产生提供合理的理论解释.电子束激发源所具有的纳米尺度下聚焦和移动的优势使电子束衍射辐射的光学手性具有灵活的调节潜力.本文提出的物理机制和独特的实验平台对于未来二进制纳米光子电路和手性纳米光源的发展具有重要意义.

关键词：电子束衍射辐射光学手性光阱

Modeling and prediction of soil sorption coefficients of polycyclic aromatic hydrocarbons using quantum chemical descriptors

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Chinese Journal Of Geochemistry 2006年第B8期25卷 182-183页

作者： Guining LU zhi dang Xueqin TAO Chen YANG Xiaoyun YI College of Environmental Science and Engineering South China University of Technology Guangzhou 510641 China

Impact of co-infections with enteric pathogens on children suffering from acute diarrhea in southwest China

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Infectious Diseases of Poverty 2016年第1期5卷 534-546页

作者： Shun-Xian Zhang Yong-Ming Zhou Wen Xu Li-Guang Tian Jia-Xu Chen Shao-Hong Chen zhi-Sheng dang Wen-Peng Gu Jian-Wen Yin Emmanuel Serrano Xiao-Nong Zhou National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionShanghai 200025People’s Republic of China Key Laboratory for Parasite and Vector Biology Ministry of Health of ChinaWHO Collaborating Center for Tropical DiseasesNational Center for International Research on Tropical DiseasesShanghai 200025People’s Republic of China Yunnan Provincial Center for Disease Control and Prevention KunmingPeople’s Republic of China Centre for Environmental and Marine Studies Departamento de BiologíaUniversidade de AveiroAveiroPortugal Servei d’Ecopatologia de Fauna Salvatge Departament de Medicina i Cirurgia AnimalsUniversitat Autònoma de BarcelonaBellaterraSpain

Background:Acute diarrhea is a global health problem,resulting in high morbidity and mortality in *** has been suggested that enteric pathogen co-infections play an important role in gastroenteritis,but most research efforts have only focused on a small range of species belonging to a few pathogen *** study aimed to assess the impact of co-infections with a broad range of enteric pathogens on children aged below five years who suffer from acute diarrhea in southwest ***:A total of 1020 subjects(850 diarrhea cases and 170 healthy controls)were selected from four sentinel hospitals in Kunming,Yunnan province,southwest China,from June 2014 to July *** specimens were collected to detect five virus(rotavirus group A,RVA;norovirus,NoV;Sapovirus,SaV;astrovirus,As;and adenovirus,Ad),seven bacterial(diarrheagenic Escherichia coli,DEC;non-typhoidal Salmonella,NTS;Shigella spp.;Vibrio cholera;Vibrio parahaemolyticus;Aeromonas spp.;and Plesiomonas spp.),and three protozoan(Cryptosporidium spp.,Giardia lamblia,and Blastocystis hominis,***)species using standard microbiologic and molecular *** were analyzed using the partial least square regression technique and chi-square ***:At least one enteric pathogen was detected in 46.7%(n=397)of acute gastroenteritis cases and 13.5%(n=23)of healthy controls(χ^(2)=64.4,P<0.05).Single infection with RVA was associated with acute diarrhea(26.5%vs.5.8%,P<0.05).The prevalence of a single infection with *** in diarrhea cases was higher than in healthy controls(3.1%vs.0.5%,OR=4.7,95%CI:1.01–112.0).Single infection with NoV GII was not associated with diarrhea(4.4%vs.3.5%,OR=1.2,95%CI:0.5–3.3).Single infections with bacterial species were not *** prevalence of co-infections with two enteric pathogens in diarrhea cases was higher than in asymptomatic children(20.1%vs.5.3%,P<0.05).RVA-NoV GII was the most common co-infection in symptomatic children(4.4%),with it aggravating the

关键词： Co-infection Diarrhea Bacteria Virus Intestinal protozoa Children Severity Kunming Yunnan China

柱撑蛭石吸附去除废水中重金属离子的实验研究

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矿物岩石 2006年第4期26卷 8-13页

作者：刘云吴平霄党志湖南省吉首大学生物资源与环境科学学院湖南吉首416000 华南理工大学环境科学与工程学院广东广州510640

分别利用有机柱化剂十二烷基磺酸钠(SDS)和无机柱化剂聚羟基铝(HA)对蛭石进行柱撑制得十二烷基磺酸钠柱撑蛭石(SDS-V erm icu lite)和聚羟基铝柱撑蛭石(HA-V erm icu lite),并通过XRD、红外光谱、ZETA电位等表征手段对柱撑蛭石进行表征... 详细信息

分别利用有机柱化剂十二烷基磺酸钠(SDS)和无机柱化剂聚羟基铝(HA)对蛭石进行柱撑制得十二烷基磺酸钠柱撑蛭石(SDS-V erm icu lite)和聚羟基铝柱撑蛭石(HA-V erm icu lite),并通过XRD、红外光谱、ZETA电位等表征手段对柱撑蛭石进行表征,同时针对柱撑蛭石对Cu2+,Cd2+,C r3+3种重金属离子的吸附进行研究,结果表明:吸附去除率受反应时间、重金属离子的初始浓度、pH值等因素的影响,经柱撑后的蛭石对重金属离子吸附的吸附性能比蛭石原矿要强。柱撑蛭石吸附3种重金属离子的动力学吸附过程可用E lov icb方程和双常数方程进行较好的拟合。

关键词：吸附柱撑蛭石重金属十二烷基磺酸钠聚羟基铝动力学

Study roadmap for high-throughput development of easy to use and affordable biomarkers as diagnostics for tropical diseases:a focus on malaria and schistosomiasis

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Infectious Diseases of Poverty 2017年第1期6卷 1149-1156页

作者： Kokouvi Kassegne Ting Zhang Shen-Bo Chen Bin Xu zhi-Sheng dang Wang-Ping Deng Eniola Michael Abe Hai-Mo Shen Wei Hu Takele Geressu Guyo Solomon Nwaka Jun-Hu Chen Xiao-Nong Zhou National Institute of Parasitic Diseases(NIPD) Chinese Centre for Disease Control and PreventionShanghai 200025People’s Republic of China WHO Collaborating Centre for Tropical Diseases National Centre for International Research on Tropical DiseasesKey Laboratory of Parasite and Vector Biology of the Chinese Ministry of HealthShanghai 200025People’s Republic of China Department of Microbiology and Microbial Engineering School of Life ScienceFudan UniversityShanghai 200433People’s Republic of China African Network for Drugs&Diagnostics Innovation(ANDI) Addis AbabaEthiopia

Background:Interventions are currently being used against‘infectious diseases of poverty’,which remain highly debilitating and deadly in most endemic countries,especially malaria,schistosomiasis,echinococcosis and African sleeping ***,major limitations of current‘traditional’methods for diagnosis are neither simple nor convenient for population surveillance,and showed low sensitivity and *** to novel technologies for the development of adequate and reliable tools are expressly needed.A collaborative project between African Network for Drugs and Diagnostics Innovation and partner institutions in Africa and China aims to screen suitable serological biomarkers for diagnostic pipelines against these‘diseases of the poor’.Methods:Parasite-specific exposed versus unexposed individuals were screened and sera or urine/stools were collected through case-control studies in China and African *** genes/open reading frames were selected,then will be cloned and cell-free expressed,quantified and *** antigens/epitopes will be probed and screened with sera from exposed or unexposed individuals using a high-throughput antigen screening platform as the study *** specificity and sensitivity of highly immunoreactive biomarkers will be evaluated as well,using enzyme-linked immunosorbent assays or ***:This roadmap explicitly unfolds the integrated operating procedures with focus on malaria and schistosomiasis,for the identification of suitable biomarkers that will aid the prioritization of diagnostics for population ***,there is need to further validate any new diagnostic through comparison with standard methods in field deployable tests for each *** expectations for the future are to seek regulatory approval and promote the use of diagnostics in endemic areas.

关键词： Malaria Schistosomiasis Neglected tropical diseases Immunoproteomics Protein microarray Serological biomarker Diagnosis

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不同链长季铵盐柱撑新疆蛭石的层间结构分析

华南理工大学学报（自然科学版） 2006年第5期34卷 15-19,37页

作者：吴平霄李荣党志华南理工大学环境科学与工程学院广东广州510640

为了研究有机物柱撑水黑云母的反应机理,选用新疆尉犁蛭石矿产出的水黑云母(金云母-蛭石间层矿物)与不同烷基链长的季铵盐阳离子表面活性剂制备出有机柱撑材料.通过X射线衍射与红外光谱进行表征分析,讨论了结晶度、电荷分布均匀性、水... 详细信息

为了研究有机物柱撑水黑云母的反应机理,选用新疆尉犁蛭石矿产出的水黑云母(金云母-蛭石间层矿物)与不同烷基链长的季铵盐阳离子表面活性剂制备出有机柱撑材料.通过X射线衍射与红外光谱进行表征分析,讨论了结晶度、电荷分布均匀性、水合阳离子及不同有机分子柱撑模式对晶层层间距的影响.结果表明:较短链长的季铵盐阳离子(C12TA+,C14TA+)只与水黑云母蛭石晶层中的水合阳离子发生反应;而长链季铵盐阳离子(C16TA+,C18TA+)先同蛭石晶层的水合阳离子交换反应,再与云母晶层中的钾离子发生交换反应.

关键词：新疆蛭石水黑云母季铵盐有机改性层间结构

长期镉胁迫对玉米CT38生长和生理特性的影响

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生态环境学报 2013年第7期22卷 1226-1230页

作者：惠俊爱党志仲恺农业工程学院园艺园林学院广东广州510225 华南理工大学广东广州510006

研究了模拟条件下外源镉胁迫长期作用下对盆栽玉米CT38生长和生理特性的影响。通过向土壤中添加不同浓度的镉,设定1,5,15,50,100 mg kg-1等5种镉质量分数,研究不同镉质量分数长期处理下对玉米CT38生长发育的影响。实验结果表明:处理90 ... 详细信息

研究了模拟条件下外源镉胁迫长期作用下对盆栽玉米CT38生长和生理特性的影响。通过向土壤中添加不同浓度的镉,设定1,5,15,50,100 mg kg-1等5种镉质量分数,研究不同镉质量分数长期处理下对玉米CT38生长发育的影响。实验结果表明:处理90 d时玉米植株高度、鲜质量镉处理质量分数1,5,15,50,100 mg kg-1在处理90 d时株高分别比对照下降了7.7%,10.3%,18.2%,56.1%,59.8%,鲜质量分别比对照下降了9.2%,31.7%,53.3%,66.9%,77.9%。高质量分数镉(100 ***-1)胁迫下玉米叶片细胞膜透性、游离脯氨酸含量明显增加。叶片MDA含量随镉处理质量分数升高而增加,高质量分数浓度镉处理则含量下降,镉胁迫导致膜脂过氧化发生,处理浓度越高,则膜脂过氧化越强,当镉胁迫质量分数超过玉米耐受范围玉米自身受害。可溶性蛋白变化趋势随镉胁迫质量分数升高呈单峰曲线,低质量分数镉胁迫刺激其含量升高,提高叶片功能,高质量分数镉胁迫则降低其含量,加速叶片衰老。

关键词：镉胁迫玉米CT38 生长生理特性

Characterization of percolation behavior in conductor-dielectric 0-3 composites

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Journal of Advanced Dielectrics 2014年第4期4卷 65-71页

作者： Lin Zhang Patrick Bass zhi-Min dang Z.-Y.Cheng Materials Research and Education Center Auburn University Auburn AL 36849 USA Laboratory of Dielectric Polymer Materials and Devices School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 P.R.China

The equationε_(eff)■/φ_(c)φ)^(s)which shows the relationship between effective dielectric constant(ε_(eff))and the filler concentration(φ),is widely used to determine the percolation behavior and obtain parameters,such as percolation thresholdφc and the power constant s in conductor-dielectric composites(CDCs).Six different systems of CDCs were used to check the expression by fitting experimental *** is found that the equation can fit the experimental results at any ***,it is found that the fitting constants do not reflect the real percolation behavior of the *** is found that the dielectric constant is strongly dependent on the frequency,which is mainly due to the fact that the frequency dependence of the dielectric constant for the composites close toφ_(c)is almost independent of the matrix.

关键词： Composite dielectric constant percolation threshold conductivity

土壤不同镉浓度对玉米CT38生长及抗氧化酶活性的影响

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生态环境学报 2014年第5期23卷 884-889页

作者：惠俊爱党志仲恺农业工程学院园艺园林学院广东广州510225 华南理工大学广东广州510331

玉米(Zea mays L.)被认为是镉吸收强、生物量大的经济作物。采用盆栽实验研究镉胁迫对玉米CT38植株生长及抗氧化酶活性的影响。通过向土壤中添加不同浓度的镉,设定1、5、15、50、100 mg·kg-1共5个镉浓度,研究不同镉浓度长期处理下对玉... 详细信息

玉米(Zea mays L.)被认为是镉吸收强、生物量大的经济作物。采用盆栽实验研究镉胁迫对玉米CT38植株生长及抗氧化酶活性的影响。通过向土壤中添加不同浓度的镉,设定1、5、15、50、100 mg·kg-1共5个镉浓度,研究不同镉浓度长期处理下对玉米CT38生长发育的影响。结果表明:处理90 d时玉米株高在镉处理浓度15、50、100 mg·kg-1分别比对照下降了18.2%、56.1%、59.8%,鲜质量分别比对照下降了53.3%、66.9%、77.9%。镉胁迫下玉米植株叶中抗氧化酶系统的POD、CAT和APX活性变化规律存在共同点,随镉处理浓度升高,基本呈单峰曲线变化,SOD活性变化情况较复杂。处理90 d时,镉处理浓度为1、5、15、50、100 mg·kg-1时,玉米CT38叶片POD活性分别比同期对照下降了12.1%、49.8%、60%、64.9%、75.1%;APX活性分别下降了54.4%、58.9%、65.6%、79.5%、85.3%;CAT活性分别增加了12.5%、18.8%、31.3%、65.6%、143.8%。CAT活性在玉米生长发育阶段随镉浓度升高呈现增加趋势镉使玉米叶片内酶含量上升,可溶性蛋白总量增加,为玉米对抗镉胁迫提供生理基础,对抗镉胁迫影响,提高POD活性,加速玉米植株内过氧化物清除速度。在相对低的镉浓度作用下,玉米叶片CAT活性升高,抵抗低浓度镉胁迫条件下产生的过氧化氢,从而适应逆境环境。

关键词：镉胁迫玉米蛋白酶系统