scholarly journals Pollution Load Potential Model of Rivers and Structure of Pollution Sources.

1992 ◽  
Vol 15 (12) ◽  
pp. 887-901 ◽  
Author(s):  
Senichi EBISE
Keyword(s):  
Potential Model ◽  
Pollution Sources ◽  
Pollution Load

Allocation of allowable pollution load by using the bankruptcy solution rules

2021 ◽  
Author(s):  
Ali Ahani ◽  
Hanif Kazerooni
Keyword(s):  
Water Resources ◽  
Pollution Source ◽  
Pollution Sources ◽  
The Novel ◽  
Pollution Load ◽  
Flow Discharge ◽  
Karun River ◽  
Solution Methods ◽  
Constrained Equal Awards ◽  
Pollution Loads

Abstract Bankruptcy solution methods are widely used and efficient methods for conflict resolution which attract considerable attention in the area of solving conflicts related to water resources. However, most of the related studies have focused on the use of bankruptcy solution methods in solving quantitative water resources conflicts. In this study, four bankruptcy solution rules including proportional (PRO), constrained equal awards (CEA), constrained equal losses (CEL), and Talmud (TAL) rules were used to develop four models to allocate the allowable pollution loads to pollution sources. One of the novel aspects of the current study is to consider the amount of each flow discharge in addition to the pollution concentration of each pollution source. Evaluation of performances of the selected bankruptcy solution rules in a reach of Karun River in Iran showed that the CEA-based model can be considered as the most desirable option for small pollution sources whereas the CEL-based model seems to be the most appropriate option for large pollution sources. The models based on PRO and TAL rules provide results between those of CEA and CEL rules which can be considered as more probable options to reach agreement on between small and large pollution sources.

BALB-Abcb4 mice lacking the hepatobiliary phospholipid transporter represent a potential model of hepatic osteodystrophy

2009 ◽  
Vol 47 (09) ◽  
Author(s):  
K Hochrath ◽  
B Rathkolb ◽  
K Butuzova ◽  
W Hans ◽  
H Fuchs ◽  
...  
Keyword(s):  
Potential Model ◽  
Hepatic Osteodystrophy

Spatial and Temporal variation analysis of water quality of Hemavathi River, Karnataka, India

2018 ◽  
Vol 6 (9) ◽  
pp. 196
Author(s):  
Santhosh K. M ◽  
S. Prashanth
Keyword(s):  
Water Quality ◽  
Agricultural Runoff ◽  
Spatial And Temporal Variation ◽  
Final Conclusion ◽  
Variation Analysis ◽  
Pollution Load ◽  
Quality Of Water ◽  
Pollution Loading ◽  
Origin Point

Urban development, agricultural runoff and industrialization have contributed pollution loading on the environment.  In this study Hemavathi river water from a stretch from its origin point to its sangama was studied for pollution load by determining parameters of water quality like pH, Alkalinity,  Ca, Mg, Nitrate, TDS, BOD, COD , and the results were compared with WHO and BIS standards to draw final conclusion on the quality of water.

RELATIVE CONTRIBUTIONS OF FIBROSIS AND CONNEXIN CHANGES TOTHE ATRIAL FIBRILLATION SUBSTRATE DURING THE DEVELOPMENT AND REVERSAL OF CONGESTIVEHEART FAILURE

2008 ◽  
Vol 31 (4) ◽  
pp. 5
Author(s):  
Brett Burstein ◽  
Kunihiro Nishida ◽  
Philippe Comtois ◽  
Louis Villenuve ◽  
Yung-Hsin Yeh ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Potential Model ◽  
Diastolic Pressure ◽  
Recovery Period ◽  
Left Ventricular ◽  
Muscle Bundle ◽  
Protein Ratio ◽  
Conduction Disturbances ◽  
Conduction Abnormalities ◽  
Mrna And Protein Expression

Background: Connexin alterations occur in various atrial fibrillation (AF) paradigms, but their functional significance remains unclear. No data are available regarding the effects of CHF on atrial connexin expression and phosphorylation. We therefore analyzed connexin changes and their contribution to the AF substrate during the development and reversal ofCHF. Methods and Results: Dogs were allocated to three groups: CHF induced by 2-week ventricular tachypacing (CHF, n=15); CHF dogs allowed to recover for 4 weeks after 2-week tachypacing (REC, n=15) and non-paced shams (CTL, n=11). Left ventricular end-diastolic pressure increased with CHF (14.5±1.0*** vs.3.7±0.7, ***P < 0.001 vs. CTL) and normalized upon CHF recovery (5.1±1.0^†††, ^††† P < 0.001 vs. CHF). Real-time PCR and Western-blot analyses revealed connexin43 (Cx43) and connexin40 (Cx40) mRNA and protein expression to be unchanged by CHF and REC. However, CHF caused Cx43 dephosphorylation(by ~73%***) and increased Cx40/Cx43 protein ratio (by ~35%***), with both alterations completely reversing in REC. Immunofluorescent confocal microscopy confirmed connexin protein trends, with a reduction in phosphorylated Cx43 (by ~68%*** in CHF) that returned to control in REC. CHF caused conduction abnormalities (phasedelay-range and heterogeneity index, both P < 0.01) and burst pacing-induced AF prolongation (CTL 22±7s, CHF 1100±171s***, REC 884±220s***) which persisted in the recovery period, along with residual fibrosis (CTL 3.6±0.7%, CHF 14.7±1.5%***, REC13.3±2.3%***). Fibrosis physically interrupted muscle bundle continuity and anionically-based action potential model of canine atrium showed that fibrosiswas able to account for the observed conduction abnormalities. Conclusions: CHF causes connexin-dephosphorylation and Cx40/Cx43ratio increases. With CHF reversal, atrial connexin alterations recover completely, but tissue fibrosis, conduction abnormalities and a substrate forAF remain with fibrosis accounting for conduction abnormalities. Thus, althougha trial connexin changes occur with CHF, they are not essential for conduction disturbances and AF promotion, which appear rather to be related primarily tofibrotic interruption of muscle-bundle continuity.

ENVIRONMENTAL IMPACT AND RISK ASSESSMENT OF THE MAIN POLLUTION SOURCES FROM THE ROMANIAN BLACK SEA COAST

2015 ◽  
Vol 14 (2) ◽  
pp. 331-340 ◽  
Author(s):  
Carmen Teodosiu ◽  
Brindusa Robu ◽  
Oana Jitar ◽  
Stefan-Adrian Strungaru ◽  
Mircea Nicoara ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Environmental Impact ◽  
Black Sea ◽  
Pollution Sources ◽  
Black Sea Coast ◽  
Sea Coast

ASSESSMENT OF JAJROOD RIVER WATERSHED MICROBIAL POLLUTION: SOURCES AND FATES

2010 ◽  
Vol 9 (3) ◽  
pp. 385-391
Author(s):  
Mahdi Maghrebi ◽  
Masoud Tajrishy ◽  
Mahdi Jamshidi
Keyword(s):  
Pollution Sources ◽  
Microbial Pollution ◽  
River Watershed

VALORIZATION OF THE URBAN ENVIRONMENT OF SOUTH SERBIA FROM THE AIR QUALITY ASPECT

2018 ◽  
Vol 28 (4) ◽  
pp. 1329-1333
Author(s):  
Miodrag Šmelcerović
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Urban Environment ◽  
Pollution Sources ◽  
Anthropogenic Sources ◽  
Anthropogenic Factors ◽  
Limit Values ◽  
Cause And Effect ◽  
Sources Of Pollution

The protection of the environment and people’s health from negative influences of the pollution of air as a medium of the environment requires constant observing of the air quality in accordance with international standards, the analysis of emission and imission of polluting matters in the air, and their connection with the sources of pollution. Having in mind the series of laws and delegated legislations which define the field of air pollution, it is necessary to closely observe these long-term processes, discovering cause-and-effect relationships between the activities of anthropogenic sources of emission of polluting matters and the level of air degradation. The relevant evaluation of the air quality of a certain area can be conducted if the level of concentration of polluting matters characteristic for the pollution sources of this area is observed in a longer period of time. The data obtained by the observation of the air pollution are the basis for creation of the recovery program of a certain area. Vranje is a town in South Serbia where there is a bigger number of anthropogenic pollution sources that can significantly diminish the air quality. The cause-and-effect relationship of the anthropogenic sources of pollution is conducted related to the analysis of systematized data which are in the relevant data base of the authorized institution The Institute of Public Health Vranje, for the time period between the year of 2012. and 2017. By the analysis of data of imission concentrations of typical polluting matters, the dominant polluting matters were determined on the territory of the town of Vranje, the ones that are the causers of the biggest air pollution and the risk for people’s health. Analysis of the concentration of soot, sulfur dioxide and nitrogen oxides indicates their presence in the air of Vranje town area in concentrations that do not exceed the permitted limit values annually. The greatest pollution is caused by the soot content in the air, especially in the winter period when the highest number of days with the values above the limit was registered. By perceiving the influence of natural and anthropogenic factors, it is clear that the concentration of polluting matters can be decreased only by establishing control over anthropogenic sources of pollution, and thus it can be contributed to the improvement of the air quality of this urban environment.

Influence of Bacau City�s Antropic Activities on the Heavy Metals Concentration Measured on Bistrita and Siret River Sides

2020 ◽  
Vol 71 (1) ◽  
pp. 350-354
Author(s):  
Alexandra-Dana Chitimus ◽  
Florin-Marian Nedeff ◽  
Ion Sandu ◽  
Cristian Radu ◽  
Emilian Mosnegutu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Pollution Sources ◽  
Municipal Waste ◽  
Sampling Points ◽  
River Banks

The main objective of the current research is to determine the content of heavy metals from the Bistrita and Siret River banks, respectively Siret River � in Bridge Holt area, Siret River � canal UHE and Siret River- downstream confluence Bistrita/Siret. The choice of sampling points took into consideration the areas where the pollution sources are located. Established maximum values were not exceeded in the case of mercury in the soil for all three sampling points Siret River � in Bridge Holt area, Siret River � canal UHE and Siret River- downstream confluence Bistrita/Siret. Exceeding values recorded in the sampling points Siret River � in Bridge Holt area, Siret River � canal UHE and Siret River- downstream confluence Bistrita/Siret (for cadmium, nickel and chrome) resulted from discharged residual waters, industrial platforms form Bacau city and the improper storage of municipal waste.

The Affine Rational Potential Model

2015 ◽  
Author(s):  
The Anh Nguyen ◽  
Frank Thomas Seifried
Keyword(s):  
Potential Model ◽  
Rational Potential

Hydrogeochemistry of Toxic Elements in Urbanized Geotechnical Systems

1997 ◽  
Vol 32 (3) ◽  
pp. 523-550
Author(s):  
S.N. Volkov
Keyword(s):  
Heavy Metals ◽  
Toxic Elements ◽  
Life Support ◽  
Alkylating Agents ◽  
Pollution Sources ◽  
The Urals

Abstract In urbanized geotechnical systems (UGSs), the majority of problems related to the ecological hydrochemistry of Cd, Pb, Ni and other heavy metals are the result of emergent characteristics of a system as a whole as opposed to individual pollution sources. In petrochemical UGSs, pollution of the environment from compounds containing methylating or alkylating agents results in an increase in the mobility of Cd, Pb, Ni, Cr and As. This process is controlled by environmental and microclimatic factors rather than by pollution sources. Under conditions of predominant dust and element effects, geo-chemically paradoxical associations of Cd with Ni, Mn and Cr can be formed in the main life support media in mining and metallurgical UGSs. Uncontrolled processes of hydrochemical interactions take place in complex multifunctional UGSs, leading to a change in speciation of heavy metals, particularly cadmium. This report is part of a 5-year study of the geotechnical systems in the Urals.

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