Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5516255
Kun Yan, Xingyuan He, Wei Chen, Tao Lu
Ozone (O3) pollution has adverse effects on the trees grown in urban area. Using open top chambers, responses of antioxidant systems were detected in Ginkgo biloba leaves at different developmental stages after a long term O3 exposure (O3 concentration ≈ 80 nmol mol-1). As leaf size is closely related to the developmental stage, leaves with different sizes were chosen to indicate the various developmental stages. The results suggested that activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT) were induced to a higher level in younger leaves with 50% expansion size under elevated O3 exposure, whereas O3-induced decrease in APX and SOD activities was found in the 80% and 100% expanded ones. Dehydroascorbate reductase (DHAR) activity and ascorbate (Asc) content were not affected by high O3 in 50% expanded leaves, but the O3-induced decrease in them occurred in the 80% and 100% expanded ones. Malondialdehyde (MDA) and hydrogen peroxide (H2O2) contents increased significantly in the 80% and 100% expanded leaves at elevated O3. However, O3-induced increase in MDA and H2O2 contents did not reach the significant level in the 50% expanded leaves, indicating the higher resistance to O3 in the younger leaves. The positive responses of antioxidant systems could be responsible for the higher resistance to O3 in the younger leaves.
{"title":"Ozone-Induced Changes in Antioxidant Systems of Ginkgo Biloba in Relation to the Developmental Stage of the Leaves","authors":"Kun Yan, Xingyuan He, Wei Chen, Tao Lu","doi":"10.1109/ICBBE.2010.5516255","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516255","url":null,"abstract":"Ozone (O<sub>3</sub>) pollution has adverse effects on the trees grown in urban area. Using open top chambers, responses of antioxidant systems were detected in Ginkgo biloba leaves at different developmental stages after a long term O<sub>3</sub> exposure (O<sub>3</sub> concentration ≈ 80 nmol mol<sup>-1</sup>). As leaf size is closely related to the developmental stage, leaves with different sizes were chosen to indicate the various developmental stages. The results suggested that activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT) were induced to a higher level in younger leaves with 50% expansion size under elevated O<sub>3</sub> exposure, whereas O<sub>3</sub>-induced decrease in APX and SOD activities was found in the 80% and 100% expanded ones. Dehydroascorbate reductase (DHAR) activity and ascorbate (Asc) content were not affected by high O<sub>3</sub> in 50% expanded leaves, but the O<sub>3</sub>-induced decrease in them occurred in the 80% and 100% expanded ones. Malondialdehyde (MDA) and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) contents increased significantly in the 80% and 100% expanded leaves at elevated O<sub>3</sub>. However, O<sub>3</sub>-induced increase in MDA and H<sub>2</sub>O<sub>2</sub> contents did not reach the significant level in the 50% expanded leaves, indicating the higher resistance to O<sub>3</sub> in the younger leaves. The positive responses of antioxidant systems could be responsible for the higher resistance to O<sub>3</sub> in the younger leaves.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"11 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75643256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5516677
Lin Zhang, Jiao Hu, X. Tan, Hongxu Long, D. Yuan, Xiu-gen Li
Gametophytic self-incompatibility (GSI) is a genetically controlled mechanism to prevent inbreeding and promote out-crossing. Pyrus pyrifolia is a commercially important fruit tree that exhibits GSI. It is necessary to identify S-genotypes of cultivars for determination of cross-compatible combination prior to performing pear plantation and breeding programs. In this study, an important local cultivar 'Huobali' extensively used as parent in pear breeding programs, and its three progenies 'Mantianhong', 'Hongsucui' and 'Meirensu' were used for S-genotyping analysis by PCR-based molecular method. Agarose gel electrophoresis showed that two fragments were produced in each of the three progenies, while three in the 'Huobali'. After restriction digestion and sequencing analysis, the S-alleles in the four cultivars were determined. The allele of 345 bp from 'Huobali' was determined as a novel S-RNase allele that was tentatively denominated as S44-RNase. RT-PCR revealed that the S44-RNase was expressed specifically in the styles, which is consistent with the expression pattern of S-RNases. Comparison of genomic and cDNA sequences revealed an intron of 148 bp for the S44-RNase. At the amino acid level, it shared 65% to 93% similarity with other Maloideae S-RNases. This study will be helpful in pear production and breeding programs.
{"title":"Identification of a Novel S-RNase Gene and S-Genotypes of Four Pear (Pyrus pyrifolia) Cultivars","authors":"Lin Zhang, Jiao Hu, X. Tan, Hongxu Long, D. Yuan, Xiu-gen Li","doi":"10.1109/ICBBE.2010.5516677","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516677","url":null,"abstract":"Gametophytic self-incompatibility (GSI) is a genetically controlled mechanism to prevent inbreeding and promote out-crossing. Pyrus pyrifolia is a commercially important fruit tree that exhibits GSI. It is necessary to identify S-genotypes of cultivars for determination of cross-compatible combination prior to performing pear plantation and breeding programs. In this study, an important local cultivar 'Huobali' extensively used as parent in pear breeding programs, and its three progenies 'Mantianhong', 'Hongsucui' and 'Meirensu' were used for S-genotyping analysis by PCR-based molecular method. Agarose gel electrophoresis showed that two fragments were produced in each of the three progenies, while three in the 'Huobali'. After restriction digestion and sequencing analysis, the S-alleles in the four cultivars were determined. The allele of 345 bp from 'Huobali' was determined as a novel S-RNase allele that was tentatively denominated as S44-RNase. RT-PCR revealed that the S44-RNase was expressed specifically in the styles, which is consistent with the expression pattern of S-RNases. Comparison of genomic and cDNA sequences revealed an intron of 148 bp for the S44-RNase. At the amino acid level, it shared 65% to 93% similarity with other Maloideae S-RNases. This study will be helpful in pear production and breeding programs.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"57 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74633719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5516593
Zhangxian Liu, Yan Zhang, Lianshan Li, R. Guo, K. Huang
Dustfall samples were synchronously collected at five typical urban functional areas (industrial area, traffic area, residential area, cultural and educational area, residential and commercial mixed area) of Pingdingshan City in Henan Province from May 2008 to April 2009. The principal component elements in dustfall samples were analyzed for concentrations, spatial distribution, sources and contributions to air pollution. The results indicated that Cd, Pb, As, Zn, S and Cu were the dominant polluted elements in the dustfall and their enrichment factors were 44.1, 15.0, 7.8, 3.4, 3.4 and 4.4, respectively. The major ionic species in dustfall were Ca2+, SO42-, Cl-, K+, Na+, F- and NO2-, and their concentrations were 2112, 825, 193, 177, 136, 136 and 130µgg-1, respectively. The industrial dust and surface soil dust, coal burning dust and constructing dust, motor vehicle emission and metal smelting dust, oil burning and waste incineration should be the dominant sources of dustfull and their contribution were 38.68%, 25.78%, 19.57%, 10.98%, respectively. Therefore, it obviously indicated that the atmospheric dust full was the multi-source pollution in Pingdingshan.
{"title":"Chemical Composition and Possible Sources of Elements in Dustfall in Pingdingshan City","authors":"Zhangxian Liu, Yan Zhang, Lianshan Li, R. Guo, K. Huang","doi":"10.1109/ICBBE.2010.5516593","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516593","url":null,"abstract":"Dustfall samples were synchronously collected at five typical urban functional areas (industrial area, traffic area, residential area, cultural and educational area, residential and commercial mixed area) of Pingdingshan City in Henan Province from May 2008 to April 2009. The principal component elements in dustfall samples were analyzed for concentrations, spatial distribution, sources and contributions to air pollution. The results indicated that Cd, Pb, As, Zn, S and Cu were the dominant polluted elements in the dustfall and their enrichment factors were 44.1, 15.0, 7.8, 3.4, 3.4 and 4.4, respectively. The major ionic species in dustfall were Ca2+, SO42-, Cl-, K+, Na+, F- and NO2-, and their concentrations were 2112, 825, 193, 177, 136, 136 and 130µgg-1, respectively. The industrial dust and surface soil dust, coal burning dust and constructing dust, motor vehicle emission and metal smelting dust, oil burning and waste incineration should be the dominant sources of dustfull and their contribution were 38.68%, 25.78%, 19.57%, 10.98%, respectively. Therefore, it obviously indicated that the atmospheric dust full was the multi-source pollution in Pingdingshan.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"25 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74647585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5517138
Yaning Luan, Xiangyang Sun, Suyan Li, Yong Qiao, L. Suo
Maturity of compost is an important practical factor in agricultural and horticulture production. This study was conducted to perform maturity assessment for spent mushroom compost (SMC). Compost maturity were evaluated using standard chemical analyses (pH, EC, CEC, total C and N content, C/N ratio, NH4+-N, NO3--N). Subsequently, potential phytotoxicity from SMC was assessed by germination bioassay using Lepidium sativum L. (cress). SMC samples were collected periodically during a 28-d rapid composting period from a single windrow. Following composting time, the pH and EC values had a tendency to increase, and in the end, the two values maintained constant. The increasing continuously CEC did not appear to be a more sensitive indicator. Although total C content (TC) and total N content (TN) were of limited value in assessing compost maturity, C/N ratio decreased significantly. NH4+-N declined within the first 14 days of composting, while NO3--N did not increase until 14+ days. According to seed germination index (GI), when composting time was prolonged, the toxicity of SMC had a tendency to decrease. Results from the experiments indicate that 21 days after rapid composting, SMC is considered to be mature. It is therefore concluded that pH, EC and GI have potential as useful indicators for SMC maturity evaluation.
{"title":"Maturity Evaluation of Spent Mushroom Compost","authors":"Yaning Luan, Xiangyang Sun, Suyan Li, Yong Qiao, L. Suo","doi":"10.1109/ICBBE.2010.5517138","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5517138","url":null,"abstract":"Maturity of compost is an important practical factor in agricultural and horticulture production. This study was conducted to perform maturity assessment for spent mushroom compost (SMC). Compost maturity were evaluated using standard chemical analyses (pH, EC, CEC, total C and N content, C/N ratio, NH4+-N, NO3--N). Subsequently, potential phytotoxicity from SMC was assessed by germination bioassay using Lepidium sativum L. (cress). SMC samples were collected periodically during a 28-d rapid composting period from a single windrow. Following composting time, the pH and EC values had a tendency to increase, and in the end, the two values maintained constant. The increasing continuously CEC did not appear to be a more sensitive indicator. Although total C content (TC) and total N content (TN) were of limited value in assessing compost maturity, C/N ratio decreased significantly. NH4+-N declined within the first 14 days of composting, while NO3--N did not increase until 14+ days. According to seed germination index (GI), when composting time was prolonged, the toxicity of SMC had a tendency to decrease. Results from the experiments indicate that 21 days after rapid composting, SMC is considered to be mature. It is therefore concluded that pH, EC and GI have potential as useful indicators for SMC maturity evaluation.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"45 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72759996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5517266
Zhiping Li, D. van Halem, J. Verberk
High arsenic groundwater and associated health risks caused by drinking high-arsenic groundwater are a great headache in many parts of the world, including China. Occurrence and distribution of high arsenic groundwater in China were firstly stated. High arsenic groundwater mainly exists in Inner Mongolia, Shanxi, Xinjiang et al, 40 counties of 8 provinces. Furthermore, arsenic mobilization processes in China were discussed by means of analyzing two typical high arsenic groundwater areas: Hetao Plain, in Inner Mongolia and Datong Basin in Shanxi Province. Even if some relevant experiments research have been carried out, changing another safe water source may be more feasible in China if there is some one available.
{"title":"Review of High Arsenic Groundwater in China","authors":"Zhiping Li, D. van Halem, J. Verberk","doi":"10.1109/ICBBE.2010.5517266","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5517266","url":null,"abstract":"High arsenic groundwater and associated health risks caused by drinking high-arsenic groundwater are a great headache in many parts of the world, including China. Occurrence and distribution of high arsenic groundwater in China were firstly stated. High arsenic groundwater mainly exists in Inner Mongolia, Shanxi, Xinjiang et al, 40 counties of 8 provinces. Furthermore, arsenic mobilization processes in China were discussed by means of analyzing two typical high arsenic groundwater areas: Hetao Plain, in Inner Mongolia and Datong Basin in Shanxi Province. Even if some relevant experiments research have been carried out, changing another safe water source may be more feasible in China if there is some one available.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"35 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72975250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5516941
G. Jing, L. Xing, Shulin Li
This paper presents experimental data and mathematical model for a laboratory scale electrodialysis (ED) cell. Mathematical model for desalination by electrodialysis (ED) was established on the basis of NaCl separation experimental data. The mathematical model started from a differential equation of steady-state mass balance, derived the equation and was validated by experiments. The model parameter was determined by the experiment data. The model gives concentration of dilute compartment for various voltages, flow rates and feed concentrations. Comparing predicted data with experimental data, excellent agreement between the experimental data and the model results indicates the capability of mathematical model to predict the desalination process.
{"title":"Study of Mathematical Model in Electrodialysis of Desalination","authors":"G. Jing, L. Xing, Shulin Li","doi":"10.1109/ICBBE.2010.5516941","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5516941","url":null,"abstract":"This paper presents experimental data and mathematical model for a laboratory scale electrodialysis (ED) cell. Mathematical model for desalination by electrodialysis (ED) was established on the basis of NaCl separation experimental data. The mathematical model started from a differential equation of steady-state mass balance, derived the equation and was validated by experiments. The model parameter was determined by the experiment data. The model gives concentration of dilute compartment for various voltages, flow rates and feed concentrations. Comparing predicted data with experimental data, excellent agreement between the experimental data and the model results indicates the capability of mathematical model to predict the desalination process.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"2 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73031566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5515490
L. Gu, Xin-jie Wang, Zhi-wen Gong, Jin Wang, Hao Xu
It is very significant for urban development and urban wetland protection. Wetland, considered as the natural ecosystem and landscape style, has great resource potentiality and environmental function. For a long time, the change of wetland landscape pattern has been affected by human activity, and has changed the existing wetland function, and exerted influence on wetland environment. In this paper, the capital city of Beijing is for the study of wetland areas, and we used Markov Model to analysis the dynamic change and the trend evolution. Supported by RS and GIS technology, combined the achievements in previous researches and numerous field investigations, we used Landsat-TM images of 1978, 1974, 1991, 1996, 2001 and 2005 as the information source. Several landscape indices were used to evaluate the changes of landscape pattern. The results showed that Beijing wetlands recourses degraded significantly in the past three decade, the area had dropped by 54.0%, from 68491.63 hm2 in 1978 to 31416.31 hm2 in 2005; The patches of wetlands tended to be irregular, and the degree of fragmentation was increasing, thus the wetlands would be easy to cause regression, and its function was difficult to exert; The transition probability matrices at two primary states (1996 and 2005) were established. Then, the development and the future tendency of wetland landscape patterns are simulated and forecasted with Markov process. Most of the natural wetlands areas would be increasing and urban area decreasing, which showed urbanization process has great impact on wetland landscape pattern.
{"title":"Landscape Monitoring and Dynamic Evolution of Wetland Resources in Beijing","authors":"L. Gu, Xin-jie Wang, Zhi-wen Gong, Jin Wang, Hao Xu","doi":"10.1109/ICBBE.2010.5515490","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5515490","url":null,"abstract":"It is very significant for urban development and urban wetland protection. Wetland, considered as the natural ecosystem and landscape style, has great resource potentiality and environmental function. For a long time, the change of wetland landscape pattern has been affected by human activity, and has changed the existing wetland function, and exerted influence on wetland environment. In this paper, the capital city of Beijing is for the study of wetland areas, and we used Markov Model to analysis the dynamic change and the trend evolution. Supported by RS and GIS technology, combined the achievements in previous researches and numerous field investigations, we used Landsat-TM images of 1978, 1974, 1991, 1996, 2001 and 2005 as the information source. Several landscape indices were used to evaluate the changes of landscape pattern. The results showed that Beijing wetlands recourses degraded significantly in the past three decade, the area had dropped by 54.0%, from 68491.63 hm2 in 1978 to 31416.31 hm2 in 2005; The patches of wetlands tended to be irregular, and the degree of fragmentation was increasing, thus the wetlands would be easy to cause regression, and its function was difficult to exert; The transition probability matrices at two primary states (1996 and 2005) were established. Then, the development and the future tendency of wetland landscape patterns are simulated and forecasted with Markov process. Most of the natural wetlands areas would be increasing and urban area decreasing, which showed urbanization process has great impact on wetland landscape pattern.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"10 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73222885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5517822
Yanbin Wu, Ming Huang
The ponding subsidence zone induced by mining cannot be ignored, at the same time, along with the expanding of mining area, water area also increased year by year. To promote resources management effectively and achieve the goal of resources use, monitoring and evaluating aquatic environment in mining subsidence supported by 3D GIS was to be carried out. This information system was established based on 3D GIS, and spatial database to manage multi-source heterogeneous data was proposed in this article, whose core was to spatial modeler, visualization and 3D spatial analysis. The structure and function and key technologies of the 3D GIS system were also studied in this paper, which emphasized on integration of aquatic environment data, water environment monitoring and evaluation model, 3D spatial analysis. The results show that this system can integrate the multi-source heterogeneous spatial data and related properties data into the whole body, demonstrate graphical visualization and analyze compositely. So using this system for resource management in mine area has strong practicability.
{"title":"Monitoring and Evaluating Aquatic Environment in Mining Subsidence Supported by 3D GIS","authors":"Yanbin Wu, Ming Huang","doi":"10.1109/ICBBE.2010.5517822","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5517822","url":null,"abstract":"The ponding subsidence zone induced by mining cannot be ignored, at the same time, along with the expanding of mining area, water area also increased year by year. To promote resources management effectively and achieve the goal of resources use, monitoring and evaluating aquatic environment in mining subsidence supported by 3D GIS was to be carried out. This information system was established based on 3D GIS, and spatial database to manage multi-source heterogeneous data was proposed in this article, whose core was to spatial modeler, visualization and 3D spatial analysis. The structure and function and key technologies of the 3D GIS system were also studied in this paper, which emphasized on integration of aquatic environment data, water environment monitoring and evaluation model, 3D spatial analysis. The results show that this system can integrate the multi-source heterogeneous spatial data and related properties data into the whole body, demonstrate graphical visualization and analyze compositely. So using this system for resource management in mine area has strong practicability.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"4 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75317783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5517979
Hui Peng, Wei Yao, Ping Huang
As an often used physical model with good theoretical and practical values, Streeter--Phelps model has been widely used to research water quality at present. However, in some special water areas the utility of Streeter--Phelps Model suffers limitations because confirming reaeration coefficient often comes from tests in rivers with fast water flow speed rather than considering the wavy effects. Furthermore, in practical research in Xiangxi River in Three Gorges Reservoir Area the changing rule of COD appears abnormity. In some water areas far from pollution source the value of COD changing with time doesn't accord with exponential attenuation but slightly sways in a certain value. This phenomenon can not be explained by former modified Streeter--Phelps models. After research it indicates that through modifying the reaeration coefficient good calculation results will be obtained. Similarly, the changing rule of COD not only can be made clear but also can provide scientific evidence to further studying rules of pollution ejection and sediment motion.
{"title":"Application of Modified Streeter-Phelps Model and COD Changing Model to Xiangxi River in Three Gorges Reservoir Area","authors":"Hui Peng, Wei Yao, Ping Huang","doi":"10.1109/ICBBE.2010.5517979","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5517979","url":null,"abstract":"As an often used physical model with good theoretical and practical values, Streeter--Phelps model has been widely used to research water quality at present. However, in some special water areas the utility of Streeter--Phelps Model suffers limitations because confirming reaeration coefficient often comes from tests in rivers with fast water flow speed rather than considering the wavy effects. Furthermore, in practical research in Xiangxi River in Three Gorges Reservoir Area the changing rule of COD appears abnormity. In some water areas far from pollution source the value of COD changing with time doesn't accord with exponential attenuation but slightly sways in a certain value. This phenomenon can not be explained by former modified Streeter--Phelps models. After research it indicates that through modifying the reaeration coefficient good calculation results will be obtained. Similarly, the changing rule of COD not only can be made clear but also can provide scientific evidence to further studying rules of pollution ejection and sediment motion.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"42 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74057705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-18DOI: 10.1109/ICBBE.2010.5515680
Yi Zheng, D. Wei, Zuxiang Fang
Action potential duration restitution (APDR) is thought to be relevant to the stability of cardiac electrophysiology. Ventricular fibrillation (VF) was simulated using the Wei-Harumi model by taking into account piecewise linear action potential duration restitution based on clinical findings. We found, in the simulation, that heart model with steeper slope of APDR required less ectopic stimuli to trigger VF. This result suggested that the APDR may affect cardiac vulnerability to VF.
{"title":"Steeper Action Potential Duration Restitution Slope Increases Risk of Ventricular Fibrillation: A Simulation Study","authors":"Yi Zheng, D. Wei, Zuxiang Fang","doi":"10.1109/ICBBE.2010.5515680","DOIUrl":"https://doi.org/10.1109/ICBBE.2010.5515680","url":null,"abstract":"Action potential duration restitution (APDR) is thought to be relevant to the stability of cardiac electrophysiology. Ventricular fibrillation (VF) was simulated using the Wei-Harumi model by taking into account piecewise linear action potential duration restitution based on clinical findings. We found, in the simulation, that heart model with steeper slope of APDR required less ectopic stimuli to trigger VF. This result suggested that the APDR may affect cardiac vulnerability to VF.","PeriodicalId":6396,"journal":{"name":"2010 4th International Conference on Bioinformatics and Biomedical Engineering","volume":"16 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74180652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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