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Chittagong, Bangladesh

Southern University Bangladesh or is a private university in Chittagong, Bangladesh. Southern was established as an Institute in 1998. Under the Private University Act.The University founded in the year 2003 got approval from Ministry of Education. Southern University is accredited by the University Grants Commission Bangladeshis the highest controlling authority for Government and Non-Government Universities in Bangladesh. Wikipedia.

Rashed-Nizam Q.M.,Chittagong University | Rahman M.M.,Chittagong University | Kamal M.,Bangladesh Atomic Energy Commission | Chowdhury M.I.,Bangladesh Atomic Energy Commission | Chowdhury M.I.,Southern University Bangladesh
Journal of Radiation Research | Year: 2014

Soil samples from the three residential hubs of Chittagong city, Bangladesh were analyzed using gamma spectrometry to estimate radiation hazard due to natural radioactive sources and anthropogenic nuclide 137Cs. The activity concentration of 226Ra was found to be in the range 11-25 Bq.kg-1, 232Th in the range 38-59 Bq.kg-1 and 40K in the range 246-414 Bq.kg-1. These results were used to calculate the radiological hazard parameters including Excess of Lifetime Cancer Risk (ELCR). The estimated outdoor gamma exposure rates were 40.6-63.8 nGy.h-1. The radiation hazard index (radium equivalent activity) ranged from 90-140 Bq.kg-1. The average value of the ELCR was found to be 0.21 × 10-3, which is lower than the world average. Sporadic fallout of 137Cs was observed with an average value of 2.0 Bq.kg-1. © The Author 2014. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology. Source

Costa J.P.,Federal University of Piaui | De Oliveira G.A.L.,Federal University of Piaui | De Almeida A.A.C.,Federal University of Piaui | Islam M.T.,Federal University of Piaui | And 3 more authors.
Brain Research | Year: 2014

Phytol, a branched chain unsaturated alcohol, is particularly interesting because it is an isolated compound from essential oils of different medicinal plants. The aim of this study was to evaluate the anxiolytic-like effects of phytol in animal models to clarify their possible action mechanism. After acute intraperitoneal treatment with phytol at doses of 25, 50 and 75 mg/kg behavioral models of open-field, elevated-plus-maze, rota-rod, light-dark, marble-burying and pentobarbital sleeping time tests were utilized. In open field test, phytol (25, 50 and 75 mg/kg) [p<0.01] increased the number of crossings and rearings. However, the number of groomings [p<0.01] was reduced. Likewise, the number of entries and the time spent in light space were increased [p<0.01] while the number of marble-burying was decreased [p<0.001], in elevated-plus-maze, light-dark and marble-burying tests, respectively. In motor activity test, phytol (75 mg/kg) impaired the rota-rod performance of mice [p<0.01]. In pentobarbital sleeping time test, phytol 75 mg/kg decreased for latency of sleeping and phytol (25, 50 and 75 mg/kg) increased the sleep time when compared to negative control [p<0.05]. All these effects were reversed by pre-treatment with flumazenil (2.5 mg/kg, i.p.), similarly to those observed with diazepam (2 mg/kg, i.p.; positive control) suggesting that the phytol presents mechanism of action by interaction with the GABAergic system. These findings suggest that acute administration of phytol exerts an anxiolytic-like effect on mice. Furthermore, suppose that phytol interacts with GABAA receptor, probably at the receptor subtypes that mediate benzodiazepines effects, to produce sedative and anxiolytic activities. © 2013 Published by Elsevier B.V. Source

Ullah H.M.A.,Gyeongsang National University | Zaman S.,North South University | Juhara F.,North South University | Akter L.,North South University | And 3 more authors.
BMC Complementary and Alternative Medicine | Year: 2014

Background: The present study was aimed to investigate the antinociceptive and anti-inflammatory activity of the Curcuma zedoaria (family Zingiberaceae) ethanolic rhizome extract in laboratory using both in vitro and in vivo methods so as to justify its traditional use in the above mentioned pathological conditions. Methods: Phytochemical screening was done to find the presence of various secondary metabolites of the plant. In vivo antinociceptive activity was performed employing the hot plate method, acidic acid induced writhing test and formalin induced writhing test on Swiss albino mice at doses of 250 and 500 mg/kg body weight. Anti-inflammatory activity test was done on Long Evans rats at two different doses (250 and 500 mg/kg body weight) by using carrageenan induced paw edema test. Finally in vitro anti-inflammatory test by protein-denaturation method was followed. Data were analyzed by one-way analysis of variance (ANOVA) and Dunnett's t-test was used as the test of significance. P value <0.05 was considered as the minimum level of significance. Results: Phytochemical screening revealed presence of tannins, saponins, flavonoids, gums & carbohydrates, steroids, alkaloids, reducing sugars and terpenoids in the extract. In the hot plate method, the extract increased the reaction time of heat sensation significantly to 61.99% and 78.22% at the doses of 250 and 500 mg/kg BW respectively. In acetic acid induced writhing test, the percent inhibition of writhing response by the extract was 48.28% and 54.02% at 250 and 500 mg/kg doses respectively (p < 0.001). The extract also significantly inhibited the licking response in both the early phase (64.49%, p < 0.01) and the late phase (62.37%, p < 0.01) in formalin induced writhing test. The extract significantly (p < 0.05, p < 0.01 and p < 0.001) inhibited carrageenan induced inflammatory response in rats in a dose related manner. In in-vitro anti-inflammatory test, the extract significantly inhibited protein denaturation of 77.15, 64.43, 53.04, 36.78 and 23.70% for doses of 500, 400, 300, 200 and 100 μg/mL respectively. Conclusions: The results obtained from the tests indicate that the plant might have one or more secondary metabolite(s) having central and peripheral analgesic and anti-inflammatory activity. © 2014 Ullah et al.; licensee BioMed Central Ltd. Source

Daiyan G.M.,Southern University Bangladesh | Mottalib M.A.,Islamic University of Technology | Rahman M.M.,Islamic University of Technology
Proceeding of the 15th International Conference on Computer and Information Technology, ICCIT 2012 | Year: 2012

A high performance decision based median filter is proposed for removal of salt and pepper in images. It is an enhanced Adaptive Switching Median filter which initially detects noise pixels iteratively through several phases and replaces the noisy pixels with median value. It calculates median value without considering noisy pixels to improve the performance of median filter for high density noise. Detection of noise is done by expanding the mask until 7×7 to maintain local information extraction. Moreover, the processing pixel is replaced by last processed pixel if the algorithm fails to detect noise free pixel at 7×7. If the noise free median value is not available at 7×7 processing window, the last processed pixel take into consideration if it is noise free. If the last processed pixel is noisy, the algorithm select a window size with 15×15 dimension and calculate the number of 0's and 255's in the processing window. Then replace the processing pixel with 0 or 255 which is more in number in the selected window. Experiment result shows that it can provide very high quality restored images for images that are contaminated by 'salt & pepper' noise, especially when the noise density is large. © 2012 IEEE. Source

Chowdhury R.H.,National University of Malaysia | Ullah H.,Southern University Bangladesh | Reaz M.B.I.,National University of Malaysia
Journal of Theoretical and Applied Information Technology | Year: 2015

Muscle fatigue is often caused by unhealthy and irregular work practice. It is defined as a long lasting reduction of the ability to contract and it is the condition when produced force is reduced. Faster walking can cause muscle fatigue, which is unhealthy when the level of fatigue is high. There are many mathematical parameters that are suitable to assess the muscle fatigue during gait. Out of these parameters, the amplitude and frequency of the surface EMG signal (sEMG) reflects the more accurate physiological activity in the motor unit during contraction and at rest. In this research, Empirical mode decomposition (EMD) - based filtering process is applied on sEMG signal for realizing the fatiguing contraction during subject walking exercise. The purpose of this research is to evaluate the surface electromyographic parameters (RMS, IAV and AIF) for addressing the effectiveness of the EMD method. In this study, RMS, IAV and AIF values were used as spectral variable, which extensively categorizes the difference between fatigue and normal muscle when using EMD method compared with other different wavelet functions (WFs). Furthermore, the outcome also demonstrates that, amplitude and frequency of EMG signal significantly changes from rest position to maximum contraction position. In this study, we will try to show that by using the EMD method an identification of reliable discrimination between fatigue and non-fatigue muscle is possible. © 2005 - 2015 JATIT & LLS. All rights reserved. Source

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