Noise pollution is one of the most harmful pollution. Uncontrolled noise of Dhaka city has made a serious and vulnerable  situation for the dwellers. Mixed areas are used in multidimensional ways so the degree and intensity of noise pollution is often  higher. In this regard, this study has been framed to explore the nature and vulnerability of noise pollution in mixed areas as well  as to realize its impacts using GIS approach. Accordingly, an investigation has been carried out employing different field  techniques in Ramna area which is a mixed area in nature and important part of the city. This study put an effort to determine the  level of noise pollution and its zone of influence to know how far noise is affecting the socio-environment of the study area. DOI: http://dx.doi.org/10.3329/jesnr.v5i1.11548 J. Environ. Sci. & Natural Resources, 5(1): 09-17, 2012

Background: The presence of ischemic ECG changes on admission has been shown to predict outcome, the relationship between the extent of ECG changes and the risk of cardiac events is still ill   defined. The severity of ST-segment depression on admission ECG has a strong association with   adverse in-hospital outcome in patients with non ST-segment elevation acute coronary syndrome. The study was done to observe the extent of ST-segment depression and in-hospital outcome in patients with non ST-segment elevation acute coronary syndrome.   Methods: This study was conducted in the Department of Cardiology in NICVD Dhaka, from   January 2006 to December 2007. Considering inclusion and exclusion criteria, a total of 183 patients   were evaluated. All the patients were evaluated clinically after admission. ECG, blood biochemistry and echocardiography were done. Patients were categorized into three groups according to the extent   of ST- segment depression.   Results: In this study, analysis of the baseline parameters revealed no statistically significant   difference among the three groups of patients (p>0.05). Mean sum of the ST-segment depression analysis was done and all mean values were more in group III patients. 41.0% patients developed  complications during the study period. Acute LVF (22.9%) was the most common complication   followed by arrhythmia (11.5%), cardiogenic shock (4.4%) and STEMI (2.2%). All the complications were more in group III patients. During this period 6% patients died and more death (12.3%) was observed in group III patients.   Conclusion: The amount of ST-segment depression is a powerful predictor of adverse in-hospital   outcome in patients with non ST-segment elevation acute coronary syndrome DOI: http://dx.doi.org/10.3329/cardio.v5i1.12275 Cardiovasc. j. 2012; 5(1): 62-66

In this paper, attempt has been made to prepare landuse map for the district of Brahmanbaria, situated in the east-central part of Bangladesh using remote sensing technique. The multi-spectral Landsat TM data for 3 November 2002, 15 December 2004, 01 February 2002, 14 March 2003 and some aerial photographs of December 2000 have been used for land-use mapping for major three crops namely aman rice (late July -early November), winter (rabi) crops and winter (boro) rice. The imagery covers the growing seasons of the above crops, where multi-spectral and multi-temporal signatures for the green vegetations have been shown in spatial domain. The interpretation of the aerial photographs have also been performed and prepared GIS layers containing the water bodies and settlements. All the signature files including the interpretations of aerial photographs have been combined to produce a composite file in GIS layers. These layers were then combined to prepare the landuse maps including the three major crops cultivated round the year. Moreover, the landuse map of Akhaura upazila was compared with the land-type map and a relation of the landuse with the land-type has also been derived. The extracted feature files corresponding to spectral signatures have been overlaid to estimate the distribution of three major crop types in the study area. The result implies that all the three major crops like, aman, rabi and boro were cultivated in the same land which was 9.2% of total land area. Similarly, areas under double and single crops were also estimated and the result revealed that all the three crop types cover 68.3% of the total land area of Brahmanbaria district.

Context: Perfluorinated compounds (PFCs) have emerged as priority environmental contaminants and detected in the environmental and biological matrices concerns due to their persistence and toxicity. Objectives:To determine the atmospheric deposition of perfluorinated compounds (PFCs) through wet deposition in Japan and measure their environmental levels and deposition flux of wet deposition for assessing the environmental distribution of PFCs. Materials and Methods:Environmental levels and estimation of deposition flux of perfluorooctane sulfonate (PFOS) and perfluorocarboxylates (PFCAs) were carried out through wet deposition in urban atmosphere of Yokohama, Japan. Solid phase extraction method coupled with high performance liquid chromatography-negative ion electrospray tandem mass spectrometry was used to quantify target PFCs in collected samples. Results:The highest concentration (95.33 ng/L) among target compounds was in snow sample of perfluorooctanoic acid (PFOA). Concentration ranges of perfluorohexanoic acid (PFHxA), perfluoroheptanoic acid (PFHpA), perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), perfluorodecanoic acid (PFDA) and perfluorooctane sulfonate (PFOS) were 0.01-1.86ng/L, 0.01-1.39 ng/L, 0.01-9.02 ng/L, 0.07-3.66 ng/L, 0.03-0.65 ng/L, and 0-0.47 ng/L, respectively. It was found that 0.6-60 fold differences existed for snow and rain water samples of which PFOA possess highest sixty folds. Statistically significant correlations between various PFCs in wet deposition samples suggested common sources of PFCs in the study area. Wet deposition flux showed monthly variation with increased amount of load during July to September. Total amount of PFCAs in wet fluxes showed composition patterns of PFOA>PFNA>PFHxA>PFHpA>PFDA. Conclusion:Wet deposition may be a potential transport mechanism of perfluorinated chemicals in the environment.