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Analysis of the monosaccharide composition of fucoidan by precolumn derivation HPLC

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Chinese Journal of Oceanology and Limnology 2009年第3期27卷 578-582页

作者：张晶晶张全斌王晶石学连张忠山 Institute of Oceanology Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences

We developed an HPLC method for analysis of the monosaccharide composition of fucoidans.The fucoidan was hydrolyzed into monosaccharides with 2 mol/L trifluoroacetic acid.Using ribose as the internal standard,the monosaccharide derivatives,obtained with 1-Phenyl-3-methyl-5-pyrazolone(PMP),were separated by reverse-phase HPLC using a gradient elution process,and monitored by ultraviolet detection at 245 nm.In the concentration range of 0.1-2.0 mmol/L,the peak area of each monosaccharide had a good linear relationship with its concentration(r2>0.998).The average recoveries of mannose,rhamnose,glucuronic acid,glucose,galactose,xylose,and fucose were 86.2%,95.1%,62.5%,102.0%,94.8%,66.6%,and 105.1%,respectively.This method was accurate and had good reproducibility and could be used to determine the monosaccharide contents of fucoidans.

关键词：成分分析高效液相色谱法单糖柱前衍生褐藻糖胶反相高效液相色谱葡萄糖醛酸浓度范围

Monitoring of organochlorine pesticides in the urban air of Dalian, China with semipermeable membrane devices

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Chinese Science Bulletin 2014年第24期59卷 2957-2965页

作者： Xiuhua Zhu Taian Shi Bernhard Henkelmann Gerd Pfister Wei Wang Jun Mu Xiaoxiao Li Liangjun Han Karl-Werner Schramm School of Environmental and Chemical Engineering Dalian Jiaotong University Helmholtz Center Munich-German Research Center for Environmental Health (GmbH) Molecular EXposomics (MEX)Ingolstdter Landstr. 1 85764 Neuherberg Munich Germany Dalian Meteorological Observatory Department fr Biowissenschaften Technische Universitt Mnchen Weihenstephaner Steig 23 85350 Freising Germany

The concentrations of 28 organochlorine pesticides(OCPs)in the urban air of Dalian,China were measured using semipermeable membrane devices(SPMDs)for the first time.Alpha-hexachlorocyclohexane(a-HCH),b-HCH,pentachlorobenzene(PentCB),hexachlorobenzene(HexCB),4,40-dichlorodiphenyltrichloroethane(4,40-DDT),4,40-dichlorodiphenyldichloroethene,endosulfan-I and endosulfan-II were the predominant OCPs in the urban air of Dalian.The concentration of OCPs sequestrated by SPMDs(CSPMD)ranged from undetected to 56,772 pg SPMD-1and had a linear correlation with the reciprocal of the average ambient atmospheric temperature(1/T).The CSPMDof PentCB and HexCB had negative correlations with T,whereas the other detected OCPs had a positive correlation.The source of HCHs,DDTs,HexCB,PentCB,chlordane,and endosulfan in the air were also evaluated.The OCPs in the urban air of Dalian could be attributed to the seasonal usage of pesticides,combustion,volatilization of aged OCPs from soil,water,plants,and long-range atmospheric transport.

关键词：有机氯农药半透膜装置空气监测城市空气二氯二苯基三氯乙烷大连中国浓度范围

Toxicity of single-walled carbon nanotubes on green microalga Chromochloris zofingiensis

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中国海洋湖沼学报：英文版 2013年第2期31卷 306-311页

作者：王艳杨开静 Yantai Institute of Coastal Zone Research Chinese Academy of Sciences

Nanoparticles,or particles in size of 1-100 nm,are extensively used in the world in different applications.For instance,single-walled carbon nanotubes(SWCNTs) are commonly used in consumer products,such as biosensors,drug and vaccine delivery transporters,and novel biomaterials.Although nanoparticles do not cause safety concerns to consumers who use nanoparticle-containing products,these small particles are potentially harmful for workers who produce them in factories or in cases of discharge to aquatic ecosystems.SWCNTs do not have a natural analogue,so the effects on health of their disposal remain largely unknown.In this study,we evaluated the effects of SWCNTs on a population of the green microalga Chromochloris zofingiensis and the profile and production of pigments and fatty acids.The alga was incubated with SWCNTs for 6 days in 0(control),40,80,160,or 320 mg/L concentrations.SWCNTs showed both positive and negative effects on the growth of C.zofingiensis,with a biomass enhancement at low levels(40-160 mg/L) but inhibition at high levels(320 mg/L).By contrast,a decreased accumulation of fatty acids and pigments of C.zofingiensis was observed over the range of the tested concentrations.These results indicate that the markers on the inhibitive toxicity of SWCNTs are increasingly sensitive in the following order:biomass and fatty acids < primary carotenoids < chlorophylls < secondary carotenoids.C.zofingiensis is a suitable microalga for evaluating the ecotoxicological hazards of SWCNTs,especially in terms of pigmentation response.

关键词：单壁碳纳米管微藻毒性水生生态系统类胡萝卜素纳米粒子浓度范围生物传感器

The preparation and application of microbubble contrast agent combining ultrasound imaging and magnetic resonance imaging

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Chinese Science Bulletin 2009年第17期54卷 2934-2939页

作者： YANG Fang LI YiXin CHEN ZhongPing GU Ning State Key Laboratory of Bioelectronics Jiangsu Laboratory for Biomaterials and Devices School of Biological Science and MedicalEngineering Southeast University Nanjing 210096 China

Encapsulated gas microbubbles are well known as ultrasound contrast agents (UCAs) for medical ultrasound (US) imaging. With the development of shell materials and preparation technologies, the application of microbubbles has been enormously popular in molecular imaging, drug delivery and targeted therapy, etc. The objective of this study is to develop Fe3O4 nanoparticle-inclusion microbubble construct. The in vitro US imaging experiment indicates that the Fe3O4 nanoparticle-inclusion microbubbles have higher US enhancement than those without Fe3O4 nanoparticle-inclusion. According to the microbubble dynamic theory, the acoustic scattering properties can be quantified by scattering cross-section of the shell. The scattering study on Fe3O4 nanoparticle-inclusion microbubbles of different concentration shows that within a certain range of concentration, the scattering cross-section of microbubble increases with the addition of Fe3O4 nanoparticles. When exceeding the concentration range, the ultrasonic characteristic of microbubbles is damped. On the other hand, since Fe3O4 nanoparticles can also serve as the Magnetic Resonance Imaging (MRI) contrast agent, they can be potentially used as contrast agents for the double-modality (MRI and US) clinical studies. However, it is important to control the concentration of Fe3O4 nanoparticles in the shell in order to realize the combined functions of US and MRI.

关键词： Fe3O4纳米粒子超声造影剂浓度范围外壳材料分子成像散射截面动力学理论声散射特性

Application of 2,2'-dithiobis(4-methylthiazole) as sensing material for construction of Lu^(3+) PVC-membrane sensor

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Chinese Chemical Letters 2011年第8期22卷 977-980页

作者： Mohammad Reza Abedi Hassan Ali Zamani Department of Applied Chemistry Quchan BranchIslamic Azad UniversityQnchanIran

在这个工作，一个新 Lu3+PVC 膜传感器基于 2,2-dithiobis (4-methylthiazole )(TMT ) 被制作了。传感器展出 19.6 潮慰瑲捩敬 ?  ? 的一个 Nernstian 斜坡 ??? 柳言吗？？

关键词：离子传感器传感材料 PVC膜应用浓度范围 TMT 检测限 MOL

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环境质量评价与环境监测环境监测

环境工程技术学报 2007年第3期 89-96页

X831200702083上海市中心城区空气中可吸入颗粒物污染水平和变化状况/王晓燕(上海市闸北区环境监测站)…∥环境科学与管理/黑龙江省环保科研院.-2006,31(7).-43~47环图X-1532005年对上海市闸北区空气中可吸入颗粒物(PM10———空气动力... 详细信息

X831200702083上海市中心城区空气中可吸入颗粒物污染水平和变化状况/王晓燕(上海市闸北区环境监测站)…∥环境科学与管理/黑龙江省环保科研院.-2006,31(7).-43~47环图X-1532005年对上海市闸北区空气中可吸入颗粒物(PM10———空气动力学当量直径小于10μm的颗粒物的总称)的污染状况进行了一年的连续监测.结果表明:全年各月PM10污染均以2级为主,占总样本数的67.6%;其次是1级占20.0%,3级占11.0%,4级占1.4%.全年空气质量状况最好的为9月份,最差为11月份.PM10浓度与CO和NO2浓度呈现出显著的相关性,说明机动车尾气是该区域PM10的主要来源

关键词：环境监测生态环境研究中心有机氯农药环境科学长期平均浓度相关性环图浓度范围降水安全与环境

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环境监测

环境工程技术学报 2010年第4期 94-104页

X830.2201002719荧光定量PCR技术在环境监测中的应用研究/赵晓祥…(东华大学环境科学与工程学院)∥环境科学与技术/湖北省环科院.-2009,32(12).-125～128环图X-21X831201002720大气中挥发性有机物在线监测系统/刘兴隆…(北京大学环境科... 详细信息

X830.2201002719荧光定量PCR技术在环境监测中的应用研究/赵晓祥…(东华大学环境科学与工程学院)∥环境科学与技术/湖北省环科院.-2009,32(12).-125～128环图X-21X831201002720大气中挥发性有机物在线监测系统/刘兴隆…(北京大学环境科学与工程学院环境模拟与污染控制国家重点联合实验室)∥环境科学学报/中科院生态环境研究中心.-2009,29(12).-2471～2477环图X-9研制了一种新型的监测大气中挥发性有机物(包括含氧挥发性有机物)的在线监测系统,即将超低温冷阱捕集-热解析装置与气相色谱-质谱仪联用.其分析方法是大气样品经除水、除O3后以60m

关键词：环境监测环境科学平均浓度浓度范围重金属环图加标回收率生态环境研究中心相对标准偏差多氯联苯

用聚乙二醇酶化脱除废水中苯酚的最佳反应条件的研究

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环境科学与管理 1994年第3期26卷 60-65页

作者：夏为民

在苯酚浓度为1～10mM(0.1～1.0g/I)的废水中,研究了聚乙二醇(PEG)在辣根过氧化酶(HRP)催化下,脱除苯酚的加入效果。为达到低成本高效率地以PEG脱除苯酚,确定了在室温下的最佳pH值,HRP浓度,PEG浓度和H_2O_2与苯酚的摩尔比,同时还研究了PE... 详细信息

在苯酚浓度为1～10mM(0.1～1.0g/I)的废水中,研究了聚乙二醇(PEG)在辣根过氧化酶(HRP)催化下,脱除苯酚的加入效果。为达到低成本高效率地以PEG脱除苯酚,确定了在室温下的最佳pH值,HRP浓度,PEG浓度和H_2O_2与苯酚的摩尔比,同时还研究了PEG和HRP浓度与反应时间的关系。实验结果表明,加入PEG对HRP的活性有显著影响。在1mM和10mM苯酚溶液中加PEG时比不加时所需的过氧化酶的量要分别少40倍和75倍。苯酚浓度越高,加入PEG的效果就越好,有PEG时,最佳pH值是8.0,H_2O_2与苯酚的摩尔比接近1.0。在几个浓度的苯酚溶液中,达95％苯酚脱除率时,确定了所需的HRP和PEG的最小用量。并且提出了两个经验模式,来计算在整个1～10mM苯酚浓度范围内,达95％苯酚脱除率时,所需最小HRP和PEG用量。在上述最佳反应条件下,在1mM和10mM苯酚溶液中达95％脱除率时,反应时间分别是5h和3h,增加HRP浓度能有效地减少反应时间,而增加PEG浓度则不影响反应时间。

关键词：苯酚脱除率最佳反应条件聚乙二醇最佳pH值摩尔比反应时间硼酸盐浓度范围苯酚化合物

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分析方法的认证

分析测试技术与仪器 2009年第4期15卷 256-261页

作者：朱彭龄兰州大学化学系甘肃兰州730000

一个方法在应用到分析实际试样之前,必须经过严格的认证,以确认分析方法在准确度、精密度、适用的浓度范围以及抗干扰能力等方面是否能够达到试样对分析方法的要求.另一方面,即使是可靠的方法,例如法定的分析方法,当一个实验室或个人初... 详细信息

一个方法在应用到分析实际试样之前,必须经过严格的认证,以确认分析方法在准确度、精密度、适用的浓度范围以及抗干扰能力等方面是否能够达到试样对分析方法的要求.另一方面,即使是可靠的方法,例如法定的分析方法,当一个实验室或个人初次使用时,也要通过认证,以证明在当时的条件下方法能被正确地执行.

关键词：认证抗干扰能力浓度范围准确度精密度实验室试样