Deltin 7

Islam, A., & Islam, M. S. (2016). Electoral boundary delimitation in Bangladesh: Challenges and options. Bangladesh Political Science Review, Deltin 7 Aviator গেম টাকা ইনকাম of Deltin 7, 12(1), 186–199.

Islam, M. S. (2020). The challenges and strategies of sustainable cities in Bangladesh: A case study on Barishal City Corporation. The Journal of Rural Development, Bangladesh Academy for Rural Development (BARD), 43(1), 125–158.

Islam, M. S. (2020). Electoral politics of minor political parties in Bangladesh: An analysis on voting representation of post-1990 parliamentary elections. Barishal Deltin 7 Aviator গেম টাকা ইনকাম Journal of Social Sciences, 1(1), 157–180.

Islam, M. S. (2020). Connecting budget and policies with sustainable development goals (SDGs): Barishal City Corporation perspectives. The Journal of Rural Development, Bangladesh Academy for Rural Development (BARD), 43(2), 131–171.

Journal: Journal of Bangladesh Chemical Society , Publisher: Bangladesh Chemical Society,

Abstract: Infrared (IR) photodissociation spectra of adenine-thymine (AT +) hetero-dimer cluster has been recorded in the region of 2900-3700 cm-1 in order to investigate the most stable conformer of adenine-thymine hetero-dimer. A new conformer (conformer I) was found which is more stable by 285, 221 and 312 cm-1 than the Watson-Crick conformer (conformer II) at DFT/B3LYP/cc-pVTZ, DFT/M06-2X/cc-pVTZ and DFT/wB97XD/cc-pVTZ levels of theory, respectively. DFT calculated vibration spectra of both conformer I and II shows good agreement with the experimental vibrational spectrum of isolated AT + base pair. According to very high level quantum chemical calculations, it is noticeable that the Watson-Crick conformer of AT base pair is not the most stable conformer in gas phase.

Journal: Journal of Bangladesh Chemical Society, Publisher: Bangladesh Chemical Society 

Abstract: Reducing the head-media spacing is of crucial importance in enabling future high-density magnetic recording. In this work,we have studied the effect of nitrogen incorporation and ultraviolet (UV) irradiation on the interaction between the perfluoropolyether (PFPE) to the carbon surface using quantum chemical method. This paper explores that the UV bonding of PFPE Z-tetraol molecule significantly changes their structural and electronic properties. The results showed that the UV irradiation significantly strengthens bonding of PFPE on carbon surfaces. It is also found that nitrogen incorporation changes the structural and chemical properties of carbon surface and enhanced the bonding between PFPE and carbon surface.

Journal: Bangladesh Journal of Physics, Publisher: Bangladesh Physical Society, 

Abstract:In this work, molecular dynamics (MD) study of triglyme (G3) solution containing lithium bis (trifluoro methyl sulfonyl) amide (Li[TFSA]) were investigated using classical atomistic force fields. G3 is a typical solvent used in non-aqueous Li-air battery. It shows here coordination of Li+ with G3 and [TFSA]- does not significantly change with increasing the concentration of G3 but self-diffusion coefficient of all the ions increases with increasing G3 concentration. The density of [Li(G3)[TFSA] complex decreases with increasing G3 concentration which lead to accelerate diffusivity of ions.

Journal: Bangladesh Journal of Physics, Publisher: Bangladesh Physical Society, 

Abstract:Terahertz (THz) absorption spectra of poly 3-hydroxyalkanoates (PHB) for different conformations were investigated using molecular dynamics (MD) method. Temperature-dependent THz absorption spectra of PHB were measured over a temperature range of 10 K to 200 K. Peaks around (2.4-2.6THz) and (3.1-3.2THz) were observed due to vibrational transition of PHB, 1stpeaks are polarized perpendicular to c(┴)axis (along a, b axis) and next peaks are oriented parallel to the c(//) axis. The peak around (2.4-2.6THz) was assigned due to vibrational transition of PHB and C-H…O=C hydrogen bonds are oriented perpendicular to the c(┴) axis. We have also investigated orientation of the intermolecular hydrogen bonds by MD simulation and confirmed that it was mainly along the b axis of PHB. THz absorption spectra shifted to the lower frequencies and noticed widening of the absorption peaks that visualized from characteristics of peaks within creasing temperature, which is well reproduce of experimental observation. Bangladesh Journal of Physics, 26(2), 21-31, December 2019

Journal: Barishal Deltin 7 Aviator গেম টাকা ইনকাম Jounal of Science and Engineering