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2012 International Conference on Biomedical Engineering and Biotechnology最新文献

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The Contamination Characteristic of Cadmium in Soil and Green Plant in the Downtown Area of Zhaoyuan City 招远市市区土壤及绿色植物中镉的污染特征
Pub Date : 2012-07-23 DOI: 10.1109/ICBEB.2012.405
Z. Lei
In April 2010, the soil and common green plants samples in the downtown area of Zhzoyuan City were gathered to study the cadmium (Cd) pollution characteristics of plants and soils in Zhaoyuan city. The investigation area was divided into 5 zones as industrial zone, inner commercial, inner residence, Traffic Area, Park and Plaza, the soil and plants sample was collected according the Uniform distribution principle with GPS. The content of Cd in soil and plants was detected by ABS. The study showed that Cd concentration in soil was accumulated at a high level, the lowest is 3.38mg/kg and the highest is 8.32mg/kg, the soil is polluted severely, its content is more than III standard. Different area has different Cd content: industrial zone is the highest, 6.98mg/kg is at the top, Park and Plaza is at the lowest, the difference in the concentration is not very great, the city's pollution has been fairly well-distributed. The physics and chemistry characteristics of soil, such as pH, CEC and organic matter are the factors that influence the Cd concentration. The study showed that only pH has the significantly correlation with Cd concentration. Other rationalized in the Cd in the concentration is not obvious relevance. Cd concentration in plants is 0.53-0.84mg/kg. The positive relationship is significant between soil and plants about the Cd concentration.
2010年4月,采集肇远市市区土壤和常见绿色植物样本,研究肇远市植物和土壤镉污染特征。调查区分为工业区、内商业区、内住宅区、交通区、公园和广场5个区,土壤和植物样本按GPS均匀分布原则采集。采用ABS检测土壤和植物中Cd含量,研究表明,土壤中Cd浓度积累水平较高,最低为3.38mg/kg,最高为8.32mg/kg,土壤污染严重,其含量超过III标准。不同区域Cd含量不同,工业区最高,最高为6.98mg/kg,公园广场最低,浓度差异不大,城市污染分布较为均匀。土壤的理化特性,如pH、CEC和有机质是影响Cd浓度的因素。研究表明,只有pH值与Cd浓度显著相关。其他合理化在Cd中的浓度相关性不明显。植物体内Cd浓度为0.53 ~ 0.84mg/kg。土壤与植物的镉浓度呈显著正相关。
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引用次数: 1
Trichloroacetic Acid Can Activate the Activity of Acidic Protease 三氯乙酸能激活酸性蛋白酶的活性
Pub Date : 2012-07-23 DOI: 10.1109/ICBEB.2012.456
Gan Zhao, Jian-liang Feng
At least among the concentration range of 1-7mmol/L, trichloroacetic acid can activate the activity of acidic protease from Asperigillus niger.
至少在1 ~ 7mmol/L浓度范围内,三氯乙酸能激活黑曲霉酸性蛋白酶的活性。
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引用次数: 0
The Chemical Characteristics and Evaluation of Water Environment in Xiangshan Harbor of the East China Sea 东海象山港水环境化学特征及评价
Pub Date : 2012-07-23 DOI: 10.1109/ICBEB.2012.402
Li-hong Chen, G. Zhu, Qing Shi, Mao Jin, Jian Zhang
The main pollutions of Xiangshan Harbor were inorganic nitrogen and inorganic phosphorus. The annual average value of inorganic nitrogen was 0.594 mg.dm-3, the lowest value was in spring (0.194 mg.dm-3), and the highest was in winter (2.212 mg.dm-3). The annual changing trend of inorganic nitrogen was winter>;autumn>;summer>;spring. The overall level of chemical oxygen demand was not high, the content of the dissolved oxygen was higher, and the reoxygenation condition was better. The nutrients in Xiangshan Harbor severely exceeded the standard. The water quality in the breed area was overall beyond IV water quality standard, and most of the water quality in Xiangshan Harbor beyond IV water quality standard.
象山港的主要污染物为无机氮和无机磷。无机氮年平均值为0.594 mg。Dm-3在春季最低(0.194 mg.dm-3),冬季最高(2.212 mg.dm-3)。无机氮的年变化趋势为冬季>,秋季>,夏季>,春季。化学需氧量总体水平不高,溶解氧含量较高,复氧条件较好。象山港的营养物质严重超标。养殖区水质总体超过IV级水质标准,象山港大部分水质超过IV级水质标准。
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引用次数: 0
The Application of Fuzzy Comprehensive Evaluation for Eutrophication Assessment of Plain Reservoirs: Take GengJing Reservoir as an Example 模糊综合评价在平原水库富营养化评价中的应用——以庚井水库为例
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.398
Ye Song, Hongwei Li, Lu Mou
The article makes use of comprehensive evaluation based on analytic hierarchy process (AHP) to research systematically on GengJing Reservoir's eutrophication condition, which is one of the most important water source in Dong Ying District, and identify the mainly Influencing factors. Analysis eutrophication level of reservoir's variation, which supplies water safety management of the area with theoretical basis.
采用基于层次分析法(AHP)的综合评价方法,对东营区重要水源地耿井水库富营养化状况进行了系统研究,确定了影响其富营养化的主要因素。分析库区富营养化程度变化,为库区水安全管理提供理论依据。
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引用次数: 2
Spatial Distribution of Organic and Inorganic Carbon in Sediments of Tai Lake, China 太湖沉积物中有机碳和无机碳的空间分布特征
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.358
N. Xu, Feng Wei, Hongying Liu, Hui Yang
The sediment in lakes is the pools of material and energy, and the composition and content of organic and inorganic carbon in sediments constrain carbon cycling. This paper conducts research of spatial distribution of organic and inorganic carbon contents in sediments of Tai lake in China based on the data of geochemical survey in the early 2000s. Results show that the organic, inorganic carbon contents in surface sediments (0-20 cm) of the lake are 5.76±4.38, 1.42±1.40 g kg-1 and those in deep sediments (160-180 cm) are 2.30±1.39, 2.30±1.39 g kg-1, respectively. The organic carbon content in deep sediments is close to that in surface sediments, but inorganic carbon content is 1.62 times of that in surface sediments. The ranges and coefficients of variation of carbon contents in deep sediments show lower spatial variability due to limited human activity. This work provides valuable information regarding accurate distribution of organic and inorganic carbon in the surface and deep sediments of Tai lake, which may be useful to evaluate intrinsic pollution in the lake.
湖泊沉积物是物质和能量的储存库,沉积物中有机碳和无机碳的组成和含量制约着碳循环。基于2000年代初的地球化学调查资料,对中国太湖沉积物中有机碳和无机碳含量的空间分布进行了研究。结果表明:湖泊表层沉积物(0 ~ 20 cm)有机碳、无机碳含量分别为5.76±4.38、1.42±1.40 g kg-1,深层沉积物(160 ~ 180 cm)有机碳、无机碳含量分别为2.30±1.39、2.30±1.39 g kg-1。深层沉积物的有机碳含量与表层沉积物的有机碳含量接近,但无机碳含量是表层沉积物的1.62倍。由于人类活动的限制,深层沉积物碳含量的变异范围和变异系数表现出较低的空间变异性。本研究为太湖表层和深层沉积物中有机碳和无机碳的准确分布提供了有价值的信息,为湖泊内在污染评价提供了依据。
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引用次数: 0
The Study of Drug Resistance of C.Albicans Biofilm to Chinese Medicinal Herb Sophora Flavescens and Liquorice 白色念珠菌生物膜对苦参和甘草的耐药性研究
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.444
Jian Li, Ailin Wang, Jihan Wang
Objective: To study the drug resistance of C. albicans biofilm at different stage of C. albicans biofilm formation to Chinese medicinal herb Sophora flavescens and liquorice. Methods: The morphology of the biofilm at different development stages(2, 4, 8, 24, 48h)in glass slide was observed under the inverted microscope. The drug resistance of dissociative C. albicans was detect with NCCLs microdilution and the changes of C. albicans drug resistance in biofilm were tested with XTT reduction method. Results: Drug resistance of C.albicans increased with the biofilm maturation significantly ( P<;0.05). Compared with planktonic C. albicans strains, The drug resistance of biofilm is 100 times. Conclusion:There is positive correlation between drug resistance and biofilm maturation of C. albicans.
目的:研究白色念珠菌生物膜形成不同阶段对苦参、甘草等中草药的耐药性。方法:倒置显微镜下观察生物膜在载玻片不同发育阶段(2、4、8、24、48h)的形态。用nccl微量稀释法检测解离性白色念珠菌的耐药性,用XTT还原法检测生物膜中白色念珠菌的耐药性变化。结果:随着生物膜的成熟,白色念珠菌的耐药性明显增加(P< 0.05)。与浮游白色念珠菌菌株相比,生物膜的耐药率为100倍。结论:白色念珠菌的耐药与生物膜成熟度呈正相关。
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引用次数: 0
Investigation on Thermoluminescence of Al2O3:C and LiF:Mg,Cu,P to Natural Background Radiation Al2O3:C和LiF:Mg,Cu,P对自然本底辐射的热释光研究
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.255
Li Yongqiang, Chen Jingmin, Xiong Zhengye, W. Wenhua, T. Zhao, Shi Wenqing, Li Shiping
To choose the best thermo luminescent dosimeters (TLDs) for low radiation dose detector, thermo luminescence responses of three kinds of TLDs, Al2O3: C and LiF: Mg, Cu, P, were measured, and the natural background radiation in Zhanjiang is used as a low radiation field. The TLDs' sensitivities were compared, Al2O3:C (the threshold dose of is about 1-2μGy) is in some sort more sensitive than LiF:Mg, Cu, P (the threshold dose of is about 2μGy). Temperature of glow peak of Al2O3:C is not so high, and the TL would decay after a relatively long period, so the TL dose response curve of Al2O3:C is deviation from linearity. Temperatures of glow peaks of LiF:Mg, Cu, P are relatively high, and the TL would hardly decay after a relatively long period, so the TL dose response curves are nearly linearity. In a word, Al2O3:C is not the best TLD in low radiation cumulative dose detection, although it is the best optically stimulated luminescence dosimeter (OSLD).
为了选择适合低辐射剂量检测器的热发光剂量计(TLDs),测量了Al2O3: C和LiF: Mg, Cu, P三种TLDs的热发光响应,并以湛江地区的自然本底辐射作为低辐射场。结果表明,Al2O3:C(阈值剂量约为1 ~ 2μGy)比LiF:Mg, Cu, P(阈值剂量约为2μGy)更敏感。Al2O3:C的发光峰温度不高,且经过较长时间后TL会衰减,因此Al2O3:C的TL剂量响应曲线偏离线性。LiF:Mg、Cu、P的发光峰温度较高,在较长的时间内TL几乎不会衰减,因此TL剂量响应曲线近似线性。综上所述,Al2O3:C虽然是最好的光激发发光剂量计(OSLD),但在低辐射累积剂量检测中并不是最好的TLD。
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引用次数: 2
TGF-Beta and CTGF Mediated Signal Transduction Pathway and Fibrosis tgf - β和CTGF介导的信号转导通路与纤维化
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.397
J. Tian, Fang Yang, Huiqin Liu
Transforming growth factor-beta (TGF-β) is one of the important cell factors which cause the fibrous function, and connective tissue growth factor (CTGF) is considered to be the downstream factor of TGF-β, mediates fibrosis of TGF-β. TGF-β induces the expression of CTGF through multiple signal transduction pathways in promoting fibrosis. This article provides a brief summary of the research progress in this area.
转化生长因子-β (TGF-β)是引起纤维功能的重要细胞因子之一,结缔组织生长因子(CTGF)被认为是TGF-β的下游因子,介导TGF-β的纤维化。TGF-β通过多种信号转导途径诱导CTGF表达促进纤维化。本文就该领域的研究进展作一简要综述。
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引用次数: 3
Research on the Treatment of Copper Wastewater with Light-burned Magnesium Combined with Chitosan 轻烧镁与壳聚糖复合处理含铜废水的研究
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.341
Liping Zhang, Jianli Yuan, Yun-Qing Shi, Y. Shi, Xiaotong Zhang
The paper studied the effect of different solid-liquid ratio, pH, temperature, stirring time and the size of light-burned magnesium on copper effluent concentration, when light-burned magnesium treats simulated copper wastewater 50mg/L combined with chitosan. The results show that: considering economic costs and the actual operability, when the experiment conditions with light burned magnesium-chitosan ratio 2:0.08, solid-liquid ratio 2g:250mL, reaction temperature, stirring time 30min, the effluent copper iron concentrations are less than 1mg/L, the range of PH is from 7 to 9.They meet the national secondary standard(1mg/L) (GB8978 1996).
以50mg/L轻烧镁与壳聚糖复合处理模拟铜废水为研究对象,研究了不同料液比、pH、温度、搅拌时间和轻烧镁粒度对铜出水浓度的影响。结果表明:考虑经济成本和实际可操作性,当实验条件为轻烧镁-壳聚糖比2:0.08,料液比2g:250mL,反应温度,搅拌时间30min时,出水铜铁浓度小于1mg/L, PH范围为7 ~ 9。符合国家二级标准(1mg/L) (GB8978 1996)。
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引用次数: 0
Fabrication of Nanopatterned Surfaces for Tissue Engineering 组织工程中纳米图案表面的制备
Pub Date : 2012-05-28 DOI: 10.1109/ICBEB.2012.220
E. Jeong, Jin W. Lee, Soo-Jeong Yeon, Jaewon Lee, Young‐Je Kwark, S. Rhee, W. Park, S. H. Kim, K. Lee
The surface nanotopography of polymer substrates is a critical factor to regulate cellular behavior in tissue engineering approaches. In this study, nanopatterned surfaces were generated via self-assembly of polystyrene-b-poly(ethylene oxide)/dodecylbenzenesulfonic acid complex systems to control preosteoblast phenotype in vitro. Polystyrene domain sizes under 100 nm strongly affected the adhesion, proliferation, and differentiation of preosteoblasts cultured on the surfaces, irrespective of the same center-to-center distance between the domains. This approach may provide a useful means to design and develop novel polymer substrates for tissue engineering applications.
在组织工程方法中,聚合物基底的表面纳米形貌是调节细胞行为的关键因素。在这项研究中,通过聚苯乙烯-b-聚(环氧乙烷)/十二烷基苯磺酸复合物系统的自组装产生纳米图案表面,以控制体外成骨前细胞表型。100 nm以下的聚苯乙烯结构域大小对培养在表面上的成骨前细胞的粘附、增殖和分化有强烈的影响,而与结构域之间的中心到中心距离无关。这种方法为设计和开发用于组织工程的新型聚合物基板提供了一种有用的方法。
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引用次数: 1
期刊
2012 International Conference on Biomedical Engineering and Biotechnology
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