Department of Mathematics and Natural Sciences (MNS): Recent submissions
Now showing items 441-460 of 687
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A 4D spacetime embedded in a 5D pseudo-Euclidean space describing interior of compact stars
(© 2017, Springer New York LLC, 2017-02-01)The present paper provides a new model of compact stars satisfying the Karmarkar condition. The model is obtained by assuming a new type of metric potential for gr r from the condition of embedding class I. The model ... -
Accurate numerical simulation of the far-field tsunami caused by the 2011 Tohoku earthquake, including the effects of Boussinesq dispersion, seawater density stratification, elastic loading, and gravitational potential change
(© 2017 Elsevier Ltd, 2017-03-01)In this study, we considered the accurate calculation of far-field tsunami waveforms by using the shallow water equations and accounting for the effects of Boussinesq dispersion, seawater density stratification, elastic ... -
Phytochemical screening of ethanol and methanol extract of pimpinella anisum and comparison of antibacterial assays of prevalent organisms in Bangladesh
(BRAC University, 2017-05)There simply aren't enough new drugs in the pharmaceutical pipeline to keep pace with the evolution of drug-resistant bacteria, the so-called superbugs”. Medicinal plants synthesize a vast array of secondary metabolites ... -
Phytochemical screening and comparative study of antibacterial assays of carum roxburghianum and trigonella foenum-graecum obtained grom plant seed
(BRAC University, 2016-11)To control the infections and microbial food spoilage the application of chemical or synthetic antimicrobial agents is one of the ancient techniques for which an enormous number of microbes are escalating resistance to ... -
A study on the microbiological status of mineral drinking water
(© 2017 Bentham Science Publishers B.V., 2017-04-01)Introduction: Water-borne diseases constitute a major health burden in Bangladesh. The objective of this study was to assess the overall quality of mineral water samples that obtained from different shops of Dhaka city. ... -
Protection against shigellosis caused by shigella dysenteriae serotype 4 in Guinea pigs using escherichia albertii dm104 as a live vaccine candidate strain
(© 2017 Akadémiai Kiadó, 2017-06)Recently, we reported the induction of protective immunity by environmental Escherichia albertii strain DM104 against Shigella dysenteriae in Guinea pig model. In this study, we assessed three different immunization routes, ... -
Computational study of electronic transport property of a quantum dot in a single electron transistor
(BRAC University, 2017-06)Microscopic object’s conductance behaviours are totally different from those of the macroscopic ones and cannot be understood, let alone deciphered using classical approach. Nanoscale systems’ electron transport is not ... -
Behaviour of gut bacteria upon stress in infants with ileostomy due to Hirschsprung disease
(BRAC University, 2017-06)Hirschsprung disease (HD) is a congenital one where the distal part of intestine lacks nerve ganglions, resulting in failure of defecation through anus. As treatment purpose, a stoma is created temporarily in the abdomen. ... -
Ni0.48Cu0.12Zn0.40Gd0.04Fe1.96O4 (Ferrite) sample preparation, planetary ball milling and calcination
(BRAC University, 2017-06)The purpose of the internship was to provide with a firsthand experience on how to measure and prepare a precise amount of the ferrite composite, Ni0.48Cu0.12Zn0.40Gd0.04Fe1.96O4 which was then further planetary ball milled ... -
Prevalence and molecular characterization of extended spectrum Beta-Lactamase producing multidrug-resistant Pseudomonas aeruginosa and Klebsiella pneumoniae isolates
(2017-06)The discovery of antibiotics has revolutionized health care worldwide. However, the life-saving role of antibiotics is threatened by the emergence of antibiotic- resistant ‘superbugs’. With the emergence of antibiotic ... -
Pattern of brain tumor among admitted patients in a specialized center of Dhaka city: a cross sectional study
(BRAC University, 2017)A brain tumor is an intracranial solid neoplasm which involves varied types of cells. Management strategies and prognosis of tumor depends on the combination of factors like the type and grade of tumor, its location, size ... -
Optimization of transpeptidation reaction of the insulin precursor for efficient yield recovery during downstream processing
(BRAC University, 2017)Nowadays Yeast cell is a popular host for recombinant human insulin production where initially it secrets insulin precursor fusion protein with N-terminal spacer peptide and deletedthreonineB30, followed by a small C-peptide ... -
In silico structural analysis, physicochemical characterization and homology modeling of Arabidopsis thaliana Na+/H+ exchanger 2 protein
(BRAC Univeristy, 2017-05)Along with climate change, salinity has a detrimental effect on plants. It can cause susceptibility towards pathogens, halt proper growth and thus lead to food insecurity. Therefore, it is necessary to comprehend the ways ... -
Antimicrobial activities of Terminalia chebula, Terminalia arjuna and Swertia chirayita against multidrug resistant Pseudmonas aeruginosa and comparison of their activities with locally available antibiotics.
(BRAC University, 2017-10)The continuous emergence of resistant bacteria is endangering the efficacy of antibiotics across the globe. The antibiotic resistance crisis has been occurring due to the overuse and misuse of these medications. However, ... -
Isolation and characterization of bacteriophage from environmental water samples specific for Klebsiella pneumoniae
(BRAC Univeristy, 2018-01)Klebsiella pneumoniae is a clinically important pathogen that is frequently associated with multidrug resistance. Recently, some of its strains have acquired superbug status. Over time it is getting difficult to treat ... -
Review of Einstein field equation solution rotational and non-rotational black holes
(BRAC University, 2017)The origin of gravitational theory of relativity includes the discussion of Sir. Isaac Newton and Einstein’s theory of relativity. A brief derivation is introduced about the spherically symmetric solution of Einstein’s ... -
Vaccine efficacy of 45 kDa outer membrane protein of escherichia coli O157:H7 in Mice Models
(BRAC University, 2017-07)Escherichia coli O157:H7 is an extremely pathogenic organism that produces a potent Shiga toxin which can cause a number of brutal diseases like Hemorrhagic Colitis (bloody diarrhoea), renal failure causing Hemolytic Uremic ... -
Isolation of E. coli phages from environmental water samples and analysis of their effect on periodic epidemics of cholera
(BRAC University, 2017-09)Cholera is a deadly infectious disease caused by the pathogen Vibrio cholerae. In our country cholera epidemics occur seasonally. Two peaks of outbreaks nicely coincide with dry season and monsoon rain. Several factors ... -
Interface application development for a Keithley 6517B electrometer using LabVIEW programming to measure resistance and temperature as functions of time
(BRAC University, 2017-10-15)This internship was set to demonstrate a basic understanding of the Keithley 6517B electrometer and LabVIEW programming. Using LabVIEW software, a Keithley 6517B Electrometer was controlled so as to supply a voltage to ... -
Screening of Lactic Acid Bacteria with antimicrobial property isolated from fermented foods
(BRAC University, 2017-10)The purpose of this study was to isolate and biochemical identification lactic acid bacteria (LAB) with antimicrobial properties from fermented vegetables and dairy products. Twenty LAB isolates were separated from all the ...