Md Hoque - Academia.edu (original) (raw)

Papers by Md Hoque

Journal of Veterinary Medical Science, 2003

To clarify the morphological and immunohistochemical characteristics in mares with granulosa thec... more To clarify the morphological and immunohistochemical characteristics in mares with granulosa theca cell tumor (GTCT), the localization of inhibin subunits (α, βA, βB) and aromatase in the granulosa cell layers and theca layers in the ovarian follicles were determined by immunohistochemical staining. The follicles were obtained from the ovaries of 6 mares with GTCT and 4 normal mares as controls. Immunohistochemically, inhibin α-subunit was localized in the granulosa cells of all follicles showing different sizes in all GTCT cases and βAsubunit was localized in two GTCT cases in all sized follicles. But inhibin βBsubunit and aromatase were not localized in GTCT cases. On the other hand, inhibin α-, βA-, and βBsubunits and aromatase were localized in the large and medium sized follicles, but inhibin βAand βB-subunits and aromatase were not stained in the small sized follicles in normal cases. These findings suggest that some mares with GTCT can secrete dimeric inhibin (inhibin A), but all GTCT cases cannot secrete inhibin B. By the results of aromatase staining it is clear that testosterone is not converted into estradiol due to the lack of aromatase in the GTCT follicles.

Electricity is the key factor for gradual development of any country let alone developing country... more Electricity is the key factor for gradual development of any country let alone developing country like Bangladesh. The demand for electricity in both households and industries is increasing rapidly with the increase of the population in Bangladesh [11]. Currently, load shedding is common phenomenon, which is causing severe problem for the country and, is hindering the progress of economy [6]. There are some key reasons for this ongoing problem such as ever increasing demand for electricity, limited natural resources, lower capacity of electricity generation, and less investment (both private and public) in this sector etc. [1,4]. Electricity crisis needs to be abolished as soon as possible in order to become Bangladesh as a developed country [9]. In this regards, the paper presents a low cost but effective and efficient model (fan with dynamo) for generating electricity which might fulfil the increasing demand in the rural areas, where the electricity from the main grid could not be possible, as well as rest of the country. Firstly, the author discusses the present scenario of electricity production system in Bangladesh and its crisis due to the increasing demand and reduces productivity. Finally, a low cost model for electricity generation to eradicate the gap between demand and supply of electricity is presented.

International Journal of Scientific and Research Publications (IJSRP)

Electricity is the key factor for gradual development of any country let alone developing country... more Electricity is the key factor for gradual development of any country let alone developing country like Bangladesh. The demand for electricity in both households and industries is increasing rapidly with the increase of the population in Bangladesh [11]. Currently, load shedding is common phenomenon, which is causing severe problem for the country and, is hindering the progress of economy [6]. There are some key reasons for this ongoing problem such as ever increasing demand for electricity, limited natural resources, lower capacity of electricity generation, and less investment (both private and public) in this sector etc. [1,4]. Electricity crisis needs to be abolished as soon as possible in order to become Bangladesh as a developed country [9]. In this regards, the paper presents a low cost but effective and efficient model (fan with dynamo) for generating electricity which might fulfil the increasing demand in the rural areas, where the electricity from the main grid could not be possible, as well as rest of the country. Firstly, the author discusses the present scenario of electricity production system in Bangladesh and its crisis due to the increasing demand and reduces productivity. Finally, a low cost model for electricity generation to eradicate the gap between demand and supply of electricity is presented.

Solid State Ionics, 2015

The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x ... more The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x BaZnO 5 − δ , Ln = La and Nd, has been studied. Differing trends with respect to dependence of the unit cell volume were observed as a function of Ca substitution. For both series of materials the limit of Ca substitution was estimated to be x ≈ 0.2. The electrical conductivity was studied in the temperature range of 1000–350 °C using electrochemical impedance spectroscopy in argon and oxygen atmospheres and via isotherms between 400 and 1000 °C as function of oxygen pressure and the water vapour pressure. A marked increase in conductivity of approx. two orders of magnitude was explained by the presence of oxygen vacancies in the calcium doped samples. At pO 2 b 10 −12 atm atm the x = 0.15 materials are predominantly oxygen ion conductors, and La 1.85 Ca 0.15 BaZnO 5 − δ displays a peak conductivity of 0.002 S cm −1 at 1000 °C. The materials display a rise in conductivity in oxidizing conditions, indicating a significant p-type contribution.

The main intent of the study was to find a suitable material with high oxide ion conductivity or ... more The main intent of the study was to find a suitable material with high oxide ion conductivity or proton conductivity which is chemically stable based on pyrochlore and other complex oxide systems. In particular how acceptor doping increased proton or oxide ion conductivity was examined in this thesis. Another purpose of the study was to investigate how the phase transition and other properties of brownmillerite structure based materials changes in humid condition. In this thesis the following materials were investigated, pyrochlore structure based materials (Nd 2-x Ca x InMO 7-δ where M=Nb,Ta 0≤x≤0.05), brownmillerite structure based materials(Ba 2 In 2-x MO 5-δ where M=Ga,Y and 0≤x≤0.85) and the zinc containing complex oxide system R 2-x Ca x BaZnO 5-δ where R=La,Nd ; 0≤x≤0.3. These materials were successfully synthesized by solid state sintering method. Rietveld refinement of X-ray diffraction (XRD) on R 2-x Ca x BaZnO 5-δ confirmed these materials possessed tetragonal structure with I4/mcm space group. Changes in the unit cell parameter with Ca 2+ introduction was proven by Rietveld analysis. XRD on hydrated samples proved that these materials were not stable in wet condition. Thermogravimetric analysis (TGA) results showed higher than expected mass losses for this system. The oxide ion conductivity of these materials increased with increase of doping level under dry Argon according to impedance spectroscopy data and the reached a maximum of ~0.01 Scm-1 at 1000 °C. The conductivity was also seen to increase further in dry oxygen, indicating significant p-type (electron hole) conductivity. Brownmillerite structure based materials (Ba 2 In 2-x MO 5-δ where M=Ga, Y and 0≤x≤0.85) possessed a structure with Ibm2 space symmetry up to x ≤ 0.5 according to XRD. The unit cell volume expanded with increase of doping (ionic radius Y 3+ =0,92Å) level and contracted with increase of dopant (ionic radius Ga 3+ =0, 62Å).PXRD of hydrated Brownmillerite showed a structural transformation from orthorhombic to tetragonal. TGA result confirmed that these materials were fully hydrated. Pyrochlore structure based materials (Nd 2-x Ca x InMO 7-δ where M=Nb, Ta 0≤x≤0.05) adopt a cubic structure with Fd-3m space group according to XRD and Rietveld refinement. These materials are not good ionic conductors according to the measured conductivity. In summary this work provides a wider understanding of the influence of the acceptor doping on oxide ion conductivity and/or proton conductivity.

International Journal of Computer Mathematics

An iterative algorithm based on binary search has been presented for finding the mode of a sorted... more An iterative algorithm based on binary search has been presented for finding the mode of a sorted array and its frequency. Complexity of the algorithm has been deduced. Numerical experiments show its supremacy over the iterative implementation of Griffiths' algorithm.

Solid State Ionics, 2015

The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x ... more The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x BaZnO 5 − δ , Ln = La and Nd, has been studied. Differing trends with respect to dependence of the unit cell volume were observed as a function of Ca substitution. For both series of materials the limit of Ca substitution was estimated to be x ≈ 0.2. The electrical conductivity was studied in the temperature range of 1000–350 °C using electrochemical impedance spectroscopy in argon and oxygen atmospheres and via isotherms between 400 and 1000 °C as function of oxygen pressure and the water vapour pressure. A marked increase in conductivity of approx. two orders of magnitude was explained by the presence of oxygen vacancies in the calcium doped samples. At pO 2 b 10 −12 atm atm the x = 0.15 materials are predominantly oxygen ion conductors, and La 1.85 Ca 0.15 BaZnO 5 − δ displays a peak conductivity of 0.002 S cm −1 at 1000 °C. The materials display a rise in conductivity in oxidizing conditions, indicating a significant p-type contribution.

... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer ... more ... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer Science and Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh (Received 26 April 1996) ...

North American Journal of Fisheries Management, 1992

Abstract We use racial and ethnicity characteristics and demographic decomposition techniques to ... more Abstract We use racial and ethnicity characteristics and demographic decomposition techniques to examine the relative effects of age, race and ethnicity, and population growth on rates of participation in freshwater and saltwater fishing in Texas through 2025. The ...

Journal of Veterinary Medical Science, 2003

To clarify the morphological and immunohistochemical characteristics in mares with granulosa thec... more To clarify the morphological and immunohistochemical characteristics in mares with granulosa theca cell tumor (GTCT), the localization of inhibin subunits (α, βA, βB) and aromatase in the granulosa cell layers and theca layers in the ovarian follicles were determined by immunohistochemical staining. The follicles were obtained from the ovaries of 6 mares with GTCT and 4 normal mares as controls. Immunohistochemically, inhibin α-subunit was localized in the granulosa cells of all follicles showing different sizes in all GTCT cases and βAsubunit was localized in two GTCT cases in all sized follicles. But inhibin βBsubunit and aromatase were not localized in GTCT cases. On the other hand, inhibin α-, βA-, and βBsubunits and aromatase were localized in the large and medium sized follicles, but inhibin βAand βB-subunits and aromatase were not stained in the small sized follicles in normal cases. These findings suggest that some mares with GTCT can secrete dimeric inhibin (inhibin A), but all GTCT cases cannot secrete inhibin B. By the results of aromatase staining it is clear that testosterone is not converted into estradiol due to the lack of aromatase in the GTCT follicles.

International Journal of Computer Mathematics, 1998

Page 1. Inrern. J. Compuirr .!4uth.. Vol. 69, pp. 253-263 Reprints available directly from the pu... more Page 1. Inrern. J. Compuirr .!4uth.. Vol. 69, pp. 253-263 Reprints available directly from the publisher Photocopying permnted by llcense only C) 1998 OP4 (O~erseas Publishers Association) Amsterdam BV Published under ...

International Journal of Computer Mathematics, 1997

... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer ... more ... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer Science and Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh (Received 26 April 1996) ...

Foodborne Pathogens and Disease, 2007

The antibacterial activity of guava (Psidiuni gunJava) and neem (Azadirac/ita iiidicn) extracts a... more The antibacterial activity of guava (Psidiuni gunJava) and neem (Azadirac/ita iiidicn) extracts against 21 strains of foodhorne pathogens were determined-Listeria nionocittogenes (five strains), Stapliilococcus ajireus (four strains), Escliericlua co/i 0157:H7 (six strains), Salmonella Enteritidis (four strains), Vibrio paraliaeniolyticus, and Bacillus cereus, and five food spoilage bacteria: Pseudoinoiias aerogiliosa, P. putida, Alcaligenes faecalis, and Aeromonas lidroplula (two strains). Guava and neem extracts showed higher antimicrobial activity against Gram-positive bacteria compared to Gram-negative bacteria except for V. para/iaeiuolyticus, P. aeroginosa, and A. /iiidropliila. None of the extracts showed antimicrobial activity against E. co/i 0157:H7 and Salmonella Enteritidis. The minimum inhibitory concentration (MIC) of ethanol extracts of guava showed the highest inhibition for L. mouocijtogeues JCM 7676 (0.1 mg/mL), S. aureus 1CM 2151 (0.1 mg/mL), S. aureus JCM 2179 (0.1 mg/mL), and V. para/iaemolyticus IFO 12711 (0.1 mg/mL) and the lowest inhibition for Alcaligenes faecalis IFO 12669, Aeromonas hydrophila NFRI 8282 (4.0 mg/mL), and A. hydrophila NFRI 8283 (4.0 mg/mL). The MIC of chloroform extracts of neem showed similar inhibition for L. nionocytogenes ATCC 43256 (4.0 mg/mL) and L. monoci/togenes ATCC 49594 (5.0 mg/mL). However, ethanol extracts of neem showed higher inhibition for S. aureiis JCM 2151 (4.5 mg/mL) and S. aureiis IFO 13276 (4.5 mg/mL) and the lower inhibition for other microorganisms (6.5 mg/mL). No significant effects of temperature and pH were found on guava and neem extracts against cocktails of L. nionocytogenes and S. aureus. The results of the present study suggest that guava and neem extracts possess compounds containing antibacterial properties that can potentially be useful to control foodbome pathogens and spoilage organisms.

… American Journal of …, 1992

We use racial and ethnicity characteristics and demographic decomposition techniques to examine t... more We use racial and ethnicity characteristics and demographic decomposition techniques to examine the relative effects of age, race and ethnicity, and population growth on rates of participation in freshwater and saltwater fishing in Texas through 2025. The ...

Journal of Chromatography A, 1989

The unsulfonated aromatic amine 4-nitro-p-cresidine (2-methoxy-5-methyl-4-nitrobenzenamine) was i... more The unsulfonated aromatic amine 4-nitro-p-cresidine (2-methoxy-5-methyl-4-nitrobenzenamine) was identified as an impurity in the regulated color additive FD&C Red. No. 40. The compound was isolated from the water-soluble color by extraction with chloroform, followed by transfer of the free amines to acid solution and subsequent separation by reversed-phase high-performance liquid chromatography. The 4-nitro-p-cresidine was collected and then identified by gas chromatography-mass spectrometry. The levels of 4-nitro-p-cresidine as well as p-cresidine and aniline were determined in commercial batches of FD&C Red. No. 40.

Journal of Veterinary Medical Science, 2003

To clarify the morphological and immunohistochemical characteristics in mares with granulosa thec... more To clarify the morphological and immunohistochemical characteristics in mares with granulosa theca cell tumor (GTCT), the localization of inhibin subunits (α, βA, βB) and aromatase in the granulosa cell layers and theca layers in the ovarian follicles were determined by immunohistochemical staining. The follicles were obtained from the ovaries of 6 mares with GTCT and 4 normal mares as controls. Immunohistochemically, inhibin α-subunit was localized in the granulosa cells of all follicles showing different sizes in all GTCT cases and βAsubunit was localized in two GTCT cases in all sized follicles. But inhibin βBsubunit and aromatase were not localized in GTCT cases. On the other hand, inhibin α-, βA-, and βBsubunits and aromatase were localized in the large and medium sized follicles, but inhibin βAand βB-subunits and aromatase were not stained in the small sized follicles in normal cases. These findings suggest that some mares with GTCT can secrete dimeric inhibin (inhibin A), but all GTCT cases cannot secrete inhibin B. By the results of aromatase staining it is clear that testosterone is not converted into estradiol due to the lack of aromatase in the GTCT follicles.

Electricity is the key factor for gradual development of any country let alone developing country... more Electricity is the key factor for gradual development of any country let alone developing country like Bangladesh. The demand for electricity in both households and industries is increasing rapidly with the increase of the population in Bangladesh [11]. Currently, load shedding is common phenomenon, which is causing severe problem for the country and, is hindering the progress of economy [6]. There are some key reasons for this ongoing problem such as ever increasing demand for electricity, limited natural resources, lower capacity of electricity generation, and less investment (both private and public) in this sector etc. [1,4]. Electricity crisis needs to be abolished as soon as possible in order to become Bangladesh as a developed country [9]. In this regards, the paper presents a low cost but effective and efficient model (fan with dynamo) for generating electricity which might fulfil the increasing demand in the rural areas, where the electricity from the main grid could not be possible, as well as rest of the country. Firstly, the author discusses the present scenario of electricity production system in Bangladesh and its crisis due to the increasing demand and reduces productivity. Finally, a low cost model for electricity generation to eradicate the gap between demand and supply of electricity is presented.

International Journal of Scientific and Research Publications (IJSRP)

Electricity is the key factor for gradual development of any country let alone developing country... more Electricity is the key factor for gradual development of any country let alone developing country like Bangladesh. The demand for electricity in both households and industries is increasing rapidly with the increase of the population in Bangladesh [11]. Currently, load shedding is common phenomenon, which is causing severe problem for the country and, is hindering the progress of economy [6]. There are some key reasons for this ongoing problem such as ever increasing demand for electricity, limited natural resources, lower capacity of electricity generation, and less investment (both private and public) in this sector etc. [1,4]. Electricity crisis needs to be abolished as soon as possible in order to become Bangladesh as a developed country [9]. In this regards, the paper presents a low cost but effective and efficient model (fan with dynamo) for generating electricity which might fulfil the increasing demand in the rural areas, where the electricity from the main grid could not be possible, as well as rest of the country. Firstly, the author discusses the present scenario of electricity production system in Bangladesh and its crisis due to the increasing demand and reduces productivity. Finally, a low cost model for electricity generation to eradicate the gap between demand and supply of electricity is presented.

Solid State Ionics, 2015

The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x ... more The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x BaZnO 5 − δ , Ln = La and Nd, has been studied. Differing trends with respect to dependence of the unit cell volume were observed as a function of Ca substitution. For both series of materials the limit of Ca substitution was estimated to be x ≈ 0.2. The electrical conductivity was studied in the temperature range of 1000–350 °C using electrochemical impedance spectroscopy in argon and oxygen atmospheres and via isotherms between 400 and 1000 °C as function of oxygen pressure and the water vapour pressure. A marked increase in conductivity of approx. two orders of magnitude was explained by the presence of oxygen vacancies in the calcium doped samples. At pO 2 b 10 −12 atm atm the x = 0.15 materials are predominantly oxygen ion conductors, and La 1.85 Ca 0.15 BaZnO 5 − δ displays a peak conductivity of 0.002 S cm −1 at 1000 °C. The materials display a rise in conductivity in oxidizing conditions, indicating a significant p-type contribution.

The main intent of the study was to find a suitable material with high oxide ion conductivity or ... more The main intent of the study was to find a suitable material with high oxide ion conductivity or proton conductivity which is chemically stable based on pyrochlore and other complex oxide systems. In particular how acceptor doping increased proton or oxide ion conductivity was examined in this thesis. Another purpose of the study was to investigate how the phase transition and other properties of brownmillerite structure based materials changes in humid condition. In this thesis the following materials were investigated, pyrochlore structure based materials (Nd 2-x Ca x InMO 7-δ where M=Nb,Ta 0≤x≤0.05), brownmillerite structure based materials(Ba 2 In 2-x MO 5-δ where M=Ga,Y and 0≤x≤0.85) and the zinc containing complex oxide system R 2-x Ca x BaZnO 5-δ where R=La,Nd ; 0≤x≤0.3. These materials were successfully synthesized by solid state sintering method. Rietveld refinement of X-ray diffraction (XRD) on R 2-x Ca x BaZnO 5-δ confirmed these materials possessed tetragonal structure with I4/mcm space group. Changes in the unit cell parameter with Ca 2+ introduction was proven by Rietveld analysis. XRD on hydrated samples proved that these materials were not stable in wet condition. Thermogravimetric analysis (TGA) results showed higher than expected mass losses for this system. The oxide ion conductivity of these materials increased with increase of doping level under dry Argon according to impedance spectroscopy data and the reached a maximum of ~0.01 Scm-1 at 1000 °C. The conductivity was also seen to increase further in dry oxygen, indicating significant p-type (electron hole) conductivity. Brownmillerite structure based materials (Ba 2 In 2-x MO 5-δ where M=Ga, Y and 0≤x≤0.85) possessed a structure with Ibm2 space symmetry up to x ≤ 0.5 according to XRD. The unit cell volume expanded with increase of doping (ionic radius Y 3+ =0,92Å) level and contracted with increase of dopant (ionic radius Ga 3+ =0, 62Å).PXRD of hydrated Brownmillerite showed a structural transformation from orthorhombic to tetragonal. TGA result confirmed that these materials were fully hydrated. Pyrochlore structure based materials (Nd 2-x Ca x InMO 7-δ where M=Nb, Ta 0≤x≤0.05) adopt a cubic structure with Fd-3m space group according to XRD and Rietveld refinement. These materials are not good ionic conductors according to the measured conductivity. In summary this work provides a wider understanding of the influence of the acceptor doping on oxide ion conductivity and/or proton conductivity.

International Journal of Computer Mathematics

An iterative algorithm based on binary search has been presented for finding the mode of a sorted... more An iterative algorithm based on binary search has been presented for finding the mode of a sorted array and its frequency. Complexity of the algorithm has been deduced. Numerical experiments show its supremacy over the iterative implementation of Griffiths' algorithm.

Solid State Ionics, 2015

The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x ... more The effect of calcium substitution on the structure and electrical conductivity of Ln 2 − x Ca x BaZnO 5 − δ , Ln = La and Nd, has been studied. Differing trends with respect to dependence of the unit cell volume were observed as a function of Ca substitution. For both series of materials the limit of Ca substitution was estimated to be x ≈ 0.2. The electrical conductivity was studied in the temperature range of 1000–350 °C using electrochemical impedance spectroscopy in argon and oxygen atmospheres and via isotherms between 400 and 1000 °C as function of oxygen pressure and the water vapour pressure. A marked increase in conductivity of approx. two orders of magnitude was explained by the presence of oxygen vacancies in the calcium doped samples. At pO 2 b 10 −12 atm atm the x = 0.15 materials are predominantly oxygen ion conductors, and La 1.85 Ca 0.15 BaZnO 5 − δ displays a peak conductivity of 0.002 S cm −1 at 1000 °C. The materials display a rise in conductivity in oxidizing conditions, indicating a significant p-type contribution.

... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer ... more ... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer Science and Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh (Received 26 April 1996) ...

North American Journal of Fisheries Management, 1992

Abstract We use racial and ethnicity characteristics and demographic decomposition techniques to ... more Abstract We use racial and ethnicity characteristics and demographic decomposition techniques to examine the relative effects of age, race and ethnicity, and population growth on rates of participation in freshwater and saltwater fishing in Texas through 2025. The ...

Journal of Veterinary Medical Science, 2003

To clarify the morphological and immunohistochemical characteristics in mares with granulosa thec... more To clarify the morphological and immunohistochemical characteristics in mares with granulosa theca cell tumor (GTCT), the localization of inhibin subunits (α, βA, βB) and aromatase in the granulosa cell layers and theca layers in the ovarian follicles were determined by immunohistochemical staining. The follicles were obtained from the ovaries of 6 mares with GTCT and 4 normal mares as controls. Immunohistochemically, inhibin α-subunit was localized in the granulosa cells of all follicles showing different sizes in all GTCT cases and βAsubunit was localized in two GTCT cases in all sized follicles. But inhibin βBsubunit and aromatase were not localized in GTCT cases. On the other hand, inhibin α-, βA-, and βBsubunits and aromatase were localized in the large and medium sized follicles, but inhibin βAand βB-subunits and aromatase were not stained in the small sized follicles in normal cases. These findings suggest that some mares with GTCT can secrete dimeric inhibin (inhibin A), but all GTCT cases cannot secrete inhibin B. By the results of aromatase staining it is clear that testosterone is not converted into estradiol due to the lack of aromatase in the GTCT follicles.

International Journal of Computer Mathematics, 1998

Page 1. Inrern. J. Compuirr .!4uth.. Vol. 69, pp. 253-263 Reprints available directly from the pu... more Page 1. Inrern. J. Compuirr .!4uth.. Vol. 69, pp. 253-263 Reprints available directly from the publisher Photocopying permnted by llcense only C) 1998 OP4 (O~erseas Publishers Association) Amsterdam BV Published under ...

International Journal of Computer Mathematics, 1997

... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer ... more ... M. KAYKOBAD, MD. SANAUL HOQUE, MD. MOSTOFA AKBAR and SUMAN KUMAR NATH Department of Computer Science and Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh (Received 26 April 1996) ...

Foodborne Pathogens and Disease, 2007

The antibacterial activity of guava (Psidiuni gunJava) and neem (Azadirac/ita iiidicn) extracts a... more The antibacterial activity of guava (Psidiuni gunJava) and neem (Azadirac/ita iiidicn) extracts against 21 strains of foodhorne pathogens were determined-Listeria nionocittogenes (five strains), Stapliilococcus ajireus (four strains), Escliericlua co/i 0157:H7 (six strains), Salmonella Enteritidis (four strains), Vibrio paraliaeniolyticus, and Bacillus cereus, and five food spoilage bacteria: Pseudoinoiias aerogiliosa, P. putida, Alcaligenes faecalis, and Aeromonas lidroplula (two strains). Guava and neem extracts showed higher antimicrobial activity against Gram-positive bacteria compared to Gram-negative bacteria except for V. para/iaeiuolyticus, P. aeroginosa, and A. /iiidropliila. None of the extracts showed antimicrobial activity against E. co/i 0157:H7 and Salmonella Enteritidis. The minimum inhibitory concentration (MIC) of ethanol extracts of guava showed the highest inhibition for L. mouocijtogeues JCM 7676 (0.1 mg/mL), S. aureus 1CM 2151 (0.1 mg/mL), S. aureus JCM 2179 (0.1 mg/mL), and V. para/iaemolyticus IFO 12711 (0.1 mg/mL) and the lowest inhibition for Alcaligenes faecalis IFO 12669, Aeromonas hydrophila NFRI 8282 (4.0 mg/mL), and A. hydrophila NFRI 8283 (4.0 mg/mL). The MIC of chloroform extracts of neem showed similar inhibition for L. nionocytogenes ATCC 43256 (4.0 mg/mL) and L. monoci/togenes ATCC 49594 (5.0 mg/mL). However, ethanol extracts of neem showed higher inhibition for S. aureiis JCM 2151 (4.5 mg/mL) and S. aureiis IFO 13276 (4.5 mg/mL) and the lower inhibition for other microorganisms (6.5 mg/mL). No significant effects of temperature and pH were found on guava and neem extracts against cocktails of L. nionocytogenes and S. aureus. The results of the present study suggest that guava and neem extracts possess compounds containing antibacterial properties that can potentially be useful to control foodbome pathogens and spoilage organisms.

… American Journal of …, 1992

We use racial and ethnicity characteristics and demographic decomposition techniques to examine t... more We use racial and ethnicity characteristics and demographic decomposition techniques to examine the relative effects of age, race and ethnicity, and population growth on rates of participation in freshwater and saltwater fishing in Texas through 2025. The ...

Journal of Chromatography A, 1989

The unsulfonated aromatic amine 4-nitro-p-cresidine (2-methoxy-5-methyl-4-nitrobenzenamine) was i... more The unsulfonated aromatic amine 4-nitro-p-cresidine (2-methoxy-5-methyl-4-nitrobenzenamine) was identified as an impurity in the regulated color additive FD&C Red. No. 40. The compound was isolated from the water-soluble color by extraction with chloroform, followed by transfer of the free amines to acid solution and subsequent separation by reversed-phase high-performance liquid chromatography. The 4-nitro-p-cresidine was collected and then identified by gas chromatography-mass spectrometry. The levels of 4-nitro-p-cresidine as well as p-cresidine and aniline were determined in commercial batches of FD&C Red. No. 40.