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Papers by adv. Shakhwat Hossain

Journal of Bangladesh College of Physicians and Surgeons

Objective: To evaluate the complications of laparoscopic cholecystectomy in the symptomatic chole... more Objective: To evaluate the complications of laparoscopic cholecystectomy in the symptomatic cholelithiasis and other benign gall bladder diseases. Methods: This descriptive observational study was carried out at CMH Dhaka and CMH Jashore from March 2016 to Jun 2022, to evaluate the frequency and outcome of management of all the complications in laparoscopic cholecystectomy. A total of 1425 patients of laparoscopic cholecystectomy were included in this study. Patients were followed up for a period of three months after operation. The complications in laparoscopic cholecystectomy observed in this study were divided into (i) Access related (ii) Intraoperative (biliary and extrabiliary) and (iii) Postoperative. Results: The incidence of access-related, intraoperative or procedure-related biliary, extrabiliary and postoperative complications were 3.64%, 2.95%, 4.98% and 1.96% respectively. Access related complications were extraperitoneal insufflations 1.40%, port site bleeding 1.19%, sm...

Cornell University - arXiv, Oct 22, 2020

Manganese ferrite (MnFe2O4) and copper doped manganese ferrite (Mn0.75Cu0.25Fe2O4) soft materials... more Manganese ferrite (MnFe2O4) and copper doped manganese ferrite (Mn0.75Cu0.25Fe2O4) soft materials were synthesized through solid-state sintering method. The phase purity and quality were confirmed from x-ray diffraction patterns. Then the samples were subjected to neutron diffraction experiment and the diffraction data were analyzed using FullProf software package. The surface morphology of the soft material samples was studied using a scanning electron microscope (SEM). Crystal parameters, crystallite parameters, occupancy at A and B sites of the spinel structure, magnetic moments of the atoms at various locations, symmetries, oxygen position parameters, bond lengths etc. were measured and compared with the reference data. In MnFe2O4, both octahedral (A) and tetrahedral (B) positions are shared by Mn 2+ and Fe 2+/3+ cations, here A site is predominantly occupied by Fe 2+ and B site is occupied by Mn at 0.825 occupancy. The Cu 2+ ions in Cu0.25Mn0.75Fe2O4 mostly occupy the B site. Copper mostly occupy the Octahedral (16d) sites. The length of the cubic lattice decreases with the increasing Copper content. The magnetic properties, i.e. A or B site magnetic moments, net magnetic moment etc. were measured using neutron diffraction analysis and compared with the bulk magnetic properties measured with VSM studies.

Journal of Armed Forces Medical College, Bangladesh, 2020

Materials and Methods: Prospective interventional control trial was performed from October 2016 t... more Materials and Methods: Prospective interventional control trial was performed from October 2016 to October 2017. Fifty patients were treated in two groups in group A (33 patients), aspiration followed by intralesional steroid (triamcinolone acetate) injection and group B (17 patients) surgical excision was performed on. Follow up of patients were done on at one, three and six months after treatment up to 1 year.

Journal of Armed Forces Medical College, Bangladesh, 2020

Introduction: Hepatocellular carcinoma (HCC) is a common cancer and is the third most common caus... more Introduction: Hepatocellular carcinoma (HCC) is a common cancer and is the third most common cause of cancer-related death worldwide. Frequent recurrence of HCC after resection is a major surgical limitation. Early recurrence is the most disappointing outcome after surgery for multinodular HCC. Several studies found good results after hepatectomy for oligonodular (2 or 3 nodules) HCC. Objectives: To observe the recurrence rate three months after hepatectomy for oligonodular HCC and study the possible risk factors. Materials and Methods: The study population consisted of 102 patients with oligonodular HCC and received hepatectomy in Combined Military Hospital (CMH) between July 2011 and July 2017 according to the following criteria: (1) numbers of tumour nodules determined by preoperative imaging (computed tomography or magnetic resonance imaging) and intraoperative exploration; (2) diagnosis of HCC confirmed by postoperative histopathology; (3) incision margins negative; (4) complet...

Journal of Armed Forces Medical College, Bangladesh, 2019

Introduction: Cholelithiasis or gallstone disease is one of the major health problems worldwide. ... more Introduction: Cholelithiasis or gallstone disease is one of the major health problems worldwide. Earlier traditional open cholecystectomy (OC) was the treatment for symptomatic gall stone disease. With the advancing cutting edge technology, laparoscopic cholecystectomy (LC), a minimal access surgery has become a well established modality of treatment. Objective: To study the overall outcome and related experiences of laparoscopic cholecystectomy. Materials and Methods: This descriptive observational study was carried out at Combined Military Hospitals of Jashore, Cumilla and Dhaka from September 2015 to December 2017. A total of 100 patients suffering from symptomatic cholelithiasis were admitted for LC and included in this study. Data were collected in a structured proforma and expressed in mean±SD, frequency and percentage. Results: Patients mean age was 42±7.63 years with ranged 25 to 62 years. Eighty five percent patients were female. Mean operative time was 55±12.37 minutes wit...

Journal of Armed Forces Medical College, Bangladesh, 2015

Introduction: Recurrences have been a significant problem following hernia repair. Prosthetic mat... more Introduction: Recurrences have been a significant problem following hernia repair. Prosthetic materials are increasingly used in hernia repair to prevent recurrences. Their use has been associated with several advantages, such as less postoperative pain, rapid recovery and low recurrence rates. Objectives: This study has been done to find out the early and late morbidity specially the recurrence rates of Hernia after mesh hernioplasty. Methods: This retrospective study, was performed on 100 patients between the periods of October 2007 to October 2012 at Combined Military Hospital, Dhaka, on whom tension free open repair were performed by Rives (Inlay), Lichtenstein (onlay) or Stoppa (GPRVS) technique. Stoppa technique was applied in bilateral cases. Laparoscopic inguinal hernia repair was done by TAPP (Trans Abdominal Pre Peritoneal) approach. All data concerning age, sex, history, and symptoms of patients, as well as the post operative condition of the patients were recorded in pre...

Physica Scripta, 2013

This work compares the performance of the traditional phenomenological Woods–Saxon (WS) and squar... more This work compares the performance of the traditional phenomenological Woods–Saxon (WS) and squared WS (SWS) potentials with that of a non-monotonic (NM) potential, for 6Li elastic scattering by targets of a wide range, namely 24,25,26Mg, 27Al, 40,44Ca, 59Co, 60Ni, 197Au and 206,208Pb at an incident energy of 88 MeV. The real part of this NM potential is derived microscopically using the energy-density functional (EDF) formalism, from a realistic two-nucleon potential, that includes the Pauli principle. The experimental differential cross sections (DCSs) for the 6Li elastic scattering are well accounted for using this raw EDF-generated real part along with an empirical imaginary part, referred to as the NM-1 potential, which needs no renormalization. To make this potential more consistent in terms of the variations of the volume integrals per nucleon pair of its real part with the target mass numbers, a completely empirical NM potential, referred to as the NM-2 potential, is derived that fits the data more satisfactorily. The DCS data are also well described by the SWS and WS potentials. However, the SWS potential is found to be inconsistent in terms of the above-mentioned criterion and the NM-2 potential has an edge over all the potentials.

Journal of Physics G: Nuclear and Particle Physics, 2013

Experimental differential cross sections of α elastic scattering by 90Zr in the 15.0–141.7 MeV ra... more Experimental differential cross sections of α elastic scattering by 90Zr in the 15.0–141.7 MeV range of the bombarding energies have been analysed within the framework of an optical model using non-monotonic (NM) potentials. These potentials are generated from the energy-density functional theory using a realistic two-nucleon potential coupled with an appropriate consideration of the Pauli principle. The NM nature of the real part of the potential seems to be gradually diminishing at energies beyond 118.0 MeV. The Airy structure of the nuclear rainbow scattering data in the energy range of 79.5–141.7 MeV is for the first time well accounted for by the shallow NM potential. Two potential families, which are located in the real part, bear a linear variation of a volume integral in the energy range 25.0–141.7 MeV with a threshold anomaly at the lower energies. The potential contains an interior repulsive part that, with energy, shifts towards the surface and gradually weakens until it is almost lost in the nuclear surface. The requirement of a deep attractive real part of the nuclear potential seems to be generally non-stringent for describing the nuclear rainbow oscillations. Some discrete ambiguities in the potentials seem to persist even when the ‘exponential falloff’ in the angular distribution following the ‘rainbow angle’ is well reproduced in this investigation using the NM real part of the optical potentials.

EPL (Europhysics Letters), 2011

Catalysis Communications, 2010

Platinum particles were electrochemically deposited over glassy carbon (GC) to prepare GC-Pt elec... more Platinum particles were electrochemically deposited over glassy carbon (GC) to prepare GC-Pt electrodes. The electrocatalytic behaviors of this electrode have been compared with that of an ordinary polycrystalline(OPC) Pt and GC electrode in reducing NO 2 − at neutral medium. The as prepared GC-Pt electrode reduced NO 2 − , exhibiting double-peak reduction waves. The reduction performance of this electrode was noticed at least 7.8 times higher than that of an OPC Pt electrode. The sensitivity of the GC-Pt electrode was found to be enhanced by the temperature rise. A consecutive mechanism, NO 2 − → NO → NH 4 + , over the as prepared GC-Pt electrode has been investigated.

Journal of Bangladesh College of Physicians and Surgeons

Objective: To evaluate the complications of laparoscopic cholecystectomy in the symptomatic chole... more Objective: To evaluate the complications of laparoscopic cholecystectomy in the symptomatic cholelithiasis and other benign gall bladder diseases. Methods: This descriptive observational study was carried out at CMH Dhaka and CMH Jashore from March 2016 to Jun 2022, to evaluate the frequency and outcome of management of all the complications in laparoscopic cholecystectomy. A total of 1425 patients of laparoscopic cholecystectomy were included in this study. Patients were followed up for a period of three months after operation. The complications in laparoscopic cholecystectomy observed in this study were divided into (i) Access related (ii) Intraoperative (biliary and extrabiliary) and (iii) Postoperative. Results: The incidence of access-related, intraoperative or procedure-related biliary, extrabiliary and postoperative complications were 3.64%, 2.95%, 4.98% and 1.96% respectively. Access related complications were extraperitoneal insufflations 1.40%, port site bleeding 1.19%, sm...

Cornell University - arXiv, Oct 22, 2020

Manganese ferrite (MnFe2O4) and copper doped manganese ferrite (Mn0.75Cu0.25Fe2O4) soft materials... more Manganese ferrite (MnFe2O4) and copper doped manganese ferrite (Mn0.75Cu0.25Fe2O4) soft materials were synthesized through solid-state sintering method. The phase purity and quality were confirmed from x-ray diffraction patterns. Then the samples were subjected to neutron diffraction experiment and the diffraction data were analyzed using FullProf software package. The surface morphology of the soft material samples was studied using a scanning electron microscope (SEM). Crystal parameters, crystallite parameters, occupancy at A and B sites of the spinel structure, magnetic moments of the atoms at various locations, symmetries, oxygen position parameters, bond lengths etc. were measured and compared with the reference data. In MnFe2O4, both octahedral (A) and tetrahedral (B) positions are shared by Mn 2+ and Fe 2+/3+ cations, here A site is predominantly occupied by Fe 2+ and B site is occupied by Mn at 0.825 occupancy. The Cu 2+ ions in Cu0.25Mn0.75Fe2O4 mostly occupy the B site. Copper mostly occupy the Octahedral (16d) sites. The length of the cubic lattice decreases with the increasing Copper content. The magnetic properties, i.e. A or B site magnetic moments, net magnetic moment etc. were measured using neutron diffraction analysis and compared with the bulk magnetic properties measured with VSM studies.

Journal of Armed Forces Medical College, Bangladesh, 2020

Materials and Methods: Prospective interventional control trial was performed from October 2016 t... more Materials and Methods: Prospective interventional control trial was performed from October 2016 to October 2017. Fifty patients were treated in two groups in group A (33 patients), aspiration followed by intralesional steroid (triamcinolone acetate) injection and group B (17 patients) surgical excision was performed on. Follow up of patients were done on at one, three and six months after treatment up to 1 year.

Journal of Armed Forces Medical College, Bangladesh, 2020

Introduction: Hepatocellular carcinoma (HCC) is a common cancer and is the third most common caus... more Introduction: Hepatocellular carcinoma (HCC) is a common cancer and is the third most common cause of cancer-related death worldwide. Frequent recurrence of HCC after resection is a major surgical limitation. Early recurrence is the most disappointing outcome after surgery for multinodular HCC. Several studies found good results after hepatectomy for oligonodular (2 or 3 nodules) HCC. Objectives: To observe the recurrence rate three months after hepatectomy for oligonodular HCC and study the possible risk factors. Materials and Methods: The study population consisted of 102 patients with oligonodular HCC and received hepatectomy in Combined Military Hospital (CMH) between July 2011 and July 2017 according to the following criteria: (1) numbers of tumour nodules determined by preoperative imaging (computed tomography or magnetic resonance imaging) and intraoperative exploration; (2) diagnosis of HCC confirmed by postoperative histopathology; (3) incision margins negative; (4) complet...

Journal of Armed Forces Medical College, Bangladesh, 2019

Introduction: Cholelithiasis or gallstone disease is one of the major health problems worldwide. ... more Introduction: Cholelithiasis or gallstone disease is one of the major health problems worldwide. Earlier traditional open cholecystectomy (OC) was the treatment for symptomatic gall stone disease. With the advancing cutting edge technology, laparoscopic cholecystectomy (LC), a minimal access surgery has become a well established modality of treatment. Objective: To study the overall outcome and related experiences of laparoscopic cholecystectomy. Materials and Methods: This descriptive observational study was carried out at Combined Military Hospitals of Jashore, Cumilla and Dhaka from September 2015 to December 2017. A total of 100 patients suffering from symptomatic cholelithiasis were admitted for LC and included in this study. Data were collected in a structured proforma and expressed in mean±SD, frequency and percentage. Results: Patients mean age was 42±7.63 years with ranged 25 to 62 years. Eighty five percent patients were female. Mean operative time was 55±12.37 minutes wit...

Journal of Armed Forces Medical College, Bangladesh, 2015

Introduction: Recurrences have been a significant problem following hernia repair. Prosthetic mat... more Introduction: Recurrences have been a significant problem following hernia repair. Prosthetic materials are increasingly used in hernia repair to prevent recurrences. Their use has been associated with several advantages, such as less postoperative pain, rapid recovery and low recurrence rates. Objectives: This study has been done to find out the early and late morbidity specially the recurrence rates of Hernia after mesh hernioplasty. Methods: This retrospective study, was performed on 100 patients between the periods of October 2007 to October 2012 at Combined Military Hospital, Dhaka, on whom tension free open repair were performed by Rives (Inlay), Lichtenstein (onlay) or Stoppa (GPRVS) technique. Stoppa technique was applied in bilateral cases. Laparoscopic inguinal hernia repair was done by TAPP (Trans Abdominal Pre Peritoneal) approach. All data concerning age, sex, history, and symptoms of patients, as well as the post operative condition of the patients were recorded in pre...

Physica Scripta, 2013

This work compares the performance of the traditional phenomenological Woods–Saxon (WS) and squar... more This work compares the performance of the traditional phenomenological Woods–Saxon (WS) and squared WS (SWS) potentials with that of a non-monotonic (NM) potential, for 6Li elastic scattering by targets of a wide range, namely 24,25,26Mg, 27Al, 40,44Ca, 59Co, 60Ni, 197Au and 206,208Pb at an incident energy of 88 MeV. The real part of this NM potential is derived microscopically using the energy-density functional (EDF) formalism, from a realistic two-nucleon potential, that includes the Pauli principle. The experimental differential cross sections (DCSs) for the 6Li elastic scattering are well accounted for using this raw EDF-generated real part along with an empirical imaginary part, referred to as the NM-1 potential, which needs no renormalization. To make this potential more consistent in terms of the variations of the volume integrals per nucleon pair of its real part with the target mass numbers, a completely empirical NM potential, referred to as the NM-2 potential, is derived that fits the data more satisfactorily. The DCS data are also well described by the SWS and WS potentials. However, the SWS potential is found to be inconsistent in terms of the above-mentioned criterion and the NM-2 potential has an edge over all the potentials.

Journal of Physics G: Nuclear and Particle Physics, 2013

Experimental differential cross sections of α elastic scattering by 90Zr in the 15.0–141.7 MeV ra... more Experimental differential cross sections of α elastic scattering by 90Zr in the 15.0–141.7 MeV range of the bombarding energies have been analysed within the framework of an optical model using non-monotonic (NM) potentials. These potentials are generated from the energy-density functional theory using a realistic two-nucleon potential coupled with an appropriate consideration of the Pauli principle. The NM nature of the real part of the potential seems to be gradually diminishing at energies beyond 118.0 MeV. The Airy structure of the nuclear rainbow scattering data in the energy range of 79.5–141.7 MeV is for the first time well accounted for by the shallow NM potential. Two potential families, which are located in the real part, bear a linear variation of a volume integral in the energy range 25.0–141.7 MeV with a threshold anomaly at the lower energies. The potential contains an interior repulsive part that, with energy, shifts towards the surface and gradually weakens until it is almost lost in the nuclear surface. The requirement of a deep attractive real part of the nuclear potential seems to be generally non-stringent for describing the nuclear rainbow oscillations. Some discrete ambiguities in the potentials seem to persist even when the ‘exponential falloff’ in the angular distribution following the ‘rainbow angle’ is well reproduced in this investigation using the NM real part of the optical potentials.

EPL (Europhysics Letters), 2011

Catalysis Communications, 2010

Platinum particles were electrochemically deposited over glassy carbon (GC) to prepare GC-Pt elec... more Platinum particles were electrochemically deposited over glassy carbon (GC) to prepare GC-Pt electrodes. The electrocatalytic behaviors of this electrode have been compared with that of an ordinary polycrystalline(OPC) Pt and GC electrode in reducing NO 2 − at neutral medium. The as prepared GC-Pt electrode reduced NO 2 − , exhibiting double-peak reduction waves. The reduction performance of this electrode was noticed at least 7.8 times higher than that of an OPC Pt electrode. The sensitivity of the GC-Pt electrode was found to be enhanced by the temperature rise. A consecutive mechanism, NO 2 − → NO → NH 4 + , over the as prepared GC-Pt electrode has been investigated.