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Search Results: 1 - 10 of 13561 matches for " Mohammad Shariful Haque Akanda "
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Comparison of Genetic Variability Between a Hatchery and a River Population of Rohu (Labeo rohita) by Allozyme Elctrophoresis
Mohammad Ashraful Alam,Mohammad Shariful Haque Akanda,Md. Muklesur Rahman Khan,Md. Samsul Alam
Pakistan Journal of Biological Sciences , 2002,
Abstract: In order to compare the genetic variability of a hatchery and a wild population of rohu (Labeo rohita), four enzyme systems, PGM, GPI, MDH and LDH were studied using horizontal starch gel electrophoresis. The enzymes were found to be encoded by 6 gene loci: Ldh-1*, Mdh-1*, Mdh-2*, Gpi-1*, Gpi-2* and Pgm*. Within the six loci, Gpi-2*, Mdh-1* and Pgm* were found to be polymorphic. The mean number of alleles per locus and heterozygosity values (observed and expected) in wild population were 1.660 and 0.217 respectively which were higher than those observed in hatchery population (1.500 and 0.142 respectively). The relatively lower level of genetic variability of hatchery population could be attributed to a limited number of founders of the hatchery stock and inbreeding.
A Qualitative Study on the Outcomes of Social Media Advertising  [PDF]
Shariful Islam, Mohammad Iqbal Mahmood
Advances in Journalism and Communication (AJC) , 2018, DOI: 10.4236/ajc.2018.62006
Abstract: In this modern digitalized world, almost everyone is attached with internet. So there is an opportunity for the advertisers to use the social apps/internet for the purpose of advertising. This study was conducted to check the impact of social media advertising on customers’ purchase intention while considering the customers’ motivation and customers’ perception as mediating variables. This is a qualitative study based on the interpretivism philosophy which is conducted on university students in China. The population for this research was the entire students of the university and the data were collected through interviews from 10 respondents. The respondents were the students of different departments of the university owning the smart phones and using Facebook and Instagram. Framework analysis approach was used to see the common responses of students regarding outcomes of social media advertising. The results have indicated that advertising on social media increases customers’ motivation and improves perception of the company for viewers which ultimately enhances customers’ purchase intention.
Tropical Incidence Relations, Polytopes, and Concordant Matroids
Mohammad Moinul Haque
Mathematics , 2012,
Abstract: In this paper, we develop a tropical analog of the classical flag variety that we call the flag Dressian. We find relations, which we call "tropical incidence relations", for when one tropical linear space is contained in another, and show that the flag Dressian is a tropical prevariety. In the case of 2-step flag Dressians, which we call "tropical incidence prevarieties", we find an equivalence between points in this space and induced subdivisions of a hypersimplex, generalizing two parts of an equivalence given by D. Speyer for tropical linear spaces. We attempt to generalize the third part of Speyer's equivalence to concordant matroids and obtain some partial results.
A Review of the Study on the Electromigration and Power Electronics  [PDF]
Md. Khalilur Rahman, Abul Monsur Mohammed Musa, Budrun Neher, Kawchar Ahmed Patwary, Mohammad Atiqur Rahman, Md. Shariful Islam
Journal of Electronics Cooling and Thermal Control (JECTC) , 2016, DOI: 10.4236/jectc.2016.61002
Abstract: Electromigration is a main challenge in the pursuit of power electronics, because physical limit to increase current density in power electronics is electromigration (EM), whereas much higher electrical current and voltage are required for power electronics packaging. So the effect of EM is an important issue in applications where high current densities are used, such as in microelectronics and related structures (e.g., Power ICs). Since the structure size of integrated circuits (ICs) decreases and the practical significance of this effect increases, the result is EM failure. On the other hand, in the next generation power electronics technology electrical current density is expected to exceed 107 A/cm2 which is another challenge. This review work has been carried out to identify the mechanism of EM damage in power electronics (e.g., pure metallization and solder joints) and also how to control this kind of damage.
Effect of Tillage and Residue Retention on Soil Properties and Crop Yields in Wheat-Mungbean-Rice Crop Rotation under Subtropical Humid Climate  [PDF]
Nazmus Salahin, Khairul Alam, Abu Taher Mohammad Anwarul Islam Mondol, Mahammad Shariful Islam, Md. Harunur Rashid, Muhammad Azizal Hoque
Open Journal of Soil Science (OJSS) , 2017, DOI: 10.4236/ojss.2017.71001
Abstract: The effects of conservation agriculture (CA) practices on soil properties along with crop yields of rice-based triple cropping systems have not been adequately assessed in Bangladesh. An experiment was conducted at Bangladesh Agricultural Research Institute, Gazipur, Bangladesh from 2009 to 2012 to assess the effects of tillage practices and crop residue retention on soil physical properties, soil organic carbon (SOC) and crop yields in a wheat-mungbean-rice system. Treatments consisted of three tillage practices (MT: minimum tillage; CT: conventional tillage and DT: deep tillage) and eight levels of crop residue management (S0—no residues retention, Sr—retention of 30 cm rice straw, Sm—whole mungbean stover retention, SW—30 cm wheat straw retention, Smr—whole mungbean stover & 30 cm rice straw retention, Srw—30 cm rice & wheat straw retention, Smw—whole mungbean stover & 30 cm wheat straw retention and Swrm—30 cm wheat and rice straw along with whole mungbean stover retention) were applied in split plot design with three replications. Bulk density (BD) and porosity responded positively to MT and increased residue retention of all crops (p > 0.05). Minimum tillage and Swrm also significantly accumulated SOC (p < 0.05; 0.38% higher than DT with no residue retention) and retained soil moisture (p < 0.05). Minimum tillage practice performed better in upland crops (p < 0.05; wheat & mungbean yields) and CT outperformed MT in wetland rice crop (p < 0.05). The grain and straw yields of wheat and rice were also influenced by previous crop residue retentions (p < 0.05). The results, therefore, suggested that increased residue retention with minimum tillage practices improved soil properties and yield of upland crops but with deeper tillage practices consistently maintained wetland rice production.
Assessment of Radiological Contamination of Soils Due to Shipbreaking Using HPGe Digital Gamma-Ray Spectrometry System  [PDF]
Mohammad Kamal Hossain, Syed Mohammod Hossain, AKM Moinul Haque Meaze
Journal of Environmental Protection (JEP) , 2010, DOI: 10.4236/jep.2010.11002
Abstract: A systematic study of the distribution of the Naturally Occurring Radioactive Materials as well as the anthropogenic radionuclide in the working environment of the Shipbreaking yards of Sitakunda, Chittagong, Bangladesh, has been carried out with an objective of establishing reliable base line data on the radiation level and hence to measure the radiation dose expose to the workers and to the inhabitants of the studied area. Fifteen Soil samples have been col-lected from five different Shipbreaking yards. Three sampling spots in each yard have been selected for having repre-sentative samples for the assessment of radioactivity releasing from 226Ra (238U), 232Th and their daughters and 40K us-ing the Digital Gamma-ray Spectrometry system coupled with a High Purity Germanium (HPGe; Canberra, 40% rela-tive efficiency, 1.8 keV resolution at 1332 keV of 60Co) detector and PC based Multichannel Analyzer (MCA, upto 16k channel). The software Genie 2000 (Canberra) and Hypermet PC have been used for data acquisition and gamma peak analysis, respectively. Each of fifteen soils (~200g) and two standards (IAEA-Soil-6 and 800Bq liquid 226Ra sprayed in Al2O3) were counted in cylindrical plastic pot using gamma spectrometry system for 20000 sec for the determination of activity concentrations of the radionuclides. The samples and standards were kept in air tied condition at least for 4 weeks before gamma counting to attain the radioactive equilibrium between daughters and parents of 226Ra (238U) and 232Th decay series. The Al2O3 based 226Ra standard was used for the construction of efficiency curve covering the wide gamma energy range. The IAEA-Soil-6 was used for quality control (QC) of the analysis. The homogeneity test and density corrections of Al2O3 based 226Ra standard were performed and implemented for the analysis. The results of ac-tivity concentrations have been used to assess the radium equivalent activities (Raeq) and the representative level index (Iγr) values in the experimental soil samples. The results have been compared with other global radioactivity measure-ments and evaluations.
Survey the Prevalence of Market Diseases of Banana
Md. Anwarul Haque,K.M. Khalequzzaman,Md. Shariful Islam,M.M. Hossain
Plant Pathology Journal , 2003,
Abstract: Market diseases of banana were surveyed in three markets of Mymensingh town. Anthracnose and botryodiplodia rots were detected as the main cause of market rots of banana fruits. About 2.04-4.90% fruits were rotted during April-September due to anthracnose and 2.96-4.74% owing to botryodiplodia rots. Both the diseases clearly correlated positive with temperature. The causes of anthracnose and botryodiplodia rots were identified as Colletotrichum musae and Botryodiplodia theobromae, respectively.
Regeneration of Blackgram (Vigna mungo L.) on Changes of Hormonal Condition
Shariful Alam MONY,Md. Shahidul HAQUE,Md. Mahabub ALAM,Mirza HASANUZZAMAN
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 2010,
Abstract: The study comprised of experiments for shoot regeneration and plantlet formation from cotyledonary node of Vigna mungo by culturing them on low concentration of BAP followed by transfer to hormone free MS medium. Cotyledonary node explants were cultured on different concentrations of BAP (0, 1, 2.5 and 50 mg l-1). Shoot regeneration occurred from cotyledonary nodes irrespective of the presence or absence of BAP in the medium. However, culture of cotyledonary node explants for 10 days on medium containing 1.0 mg l-1 BAP followed by transfer to hormone free medium gave higher number of shoots (9.33/explant) compared to culture of the explants on hormone free medium for 15 days followed by transfer to medium containing 1.0 mg l-1 BAP (8.33/explants). The regenerated shoots were transferred to rooting medium supplemented with different concentrations of IBA and NAA. The high frequency (100.0%) of rooting was observed with MS medium supplemented with 0.5 mg l-1 IBA. The rooted plants were transferred to pots for hardening.
Optimization of Supercritical CO2 Extraction of Fish Oil from Viscera of African Catfish (Clarias gariepinus)
Mohamed Zaidul Islam Sarker,Jinap Selamat,Abu Sayem Md. Ahsan Habib,Sahena Ferdosh,Mohamed Jahurul Haque Akanda,Juliana Mohamed Jaffri
International Journal of Molecular Sciences , 2012, DOI: 10.3390/ijms130911312
Abstract: Fish oil was extracted from the viscera of African Catfish using supercritical carbon dioxide (SC-CO 2). A Central Composite Design of Response Surface methodology (RSM) was employed to optimize the SC-CO 2 extraction parameters. The oil yield ( Y) as response variable was executed against the four independent variables, namely pressure, temperature, flow rate and soaking time. The oil yield varied with the linear, quadratic and interaction of pressure, temperature, flow rate and soaking time. Optimum points were observed within the variables of temperature from 35 °C to 80 °C, pressure from 10 MPa to 40 MPa, flow rate from 1 mL/min to 3 mL/min and soaking time from 1 h to 4 h. However, the extraction parameters were found to be optimized at temperature 57.5 °C, pressure 40 MPa, flow rate 2.0 mL/min and soaking time 2.5 h. At this optimized condition, the highest oil yields were found to be 67.0% (g oil/100 g sample on dry basis) in the viscera of catfish which was reasonable to the yields of 78.0% extracted using the Soxhlet method.
Effect of Some Biopolymers on the Rheological Behavior of Surimi Gel
Md. Zaidul Islam Sarker,M. Abd Elgadir,Sahena Ferdosh,Md. Jahurul Haque Akanda,Mohd Yazid Abdul Manap,Takahiro Noda
Molecules , 2012, DOI: 10.3390/molecules17055733
Abstract: The objective of this study was to investigate the effect of selected biopolymers on the rheological properties of surimi. In our paper, we highlight the functional properties and rheological aspects of some starch mixtures used in surimi. However, the influence of some other ingredients, such as cryoprotectants, mannans, and hydroxylpropylmethylcellulose (HPMC), on the rheological properties of surimi is also described. The outcome reveals that storage modulus increased with the addition of higher levels of starch. Moreover, the increasing starch level increased the breaking force, deformation, and gel strength of surimi as a result of the absorption of water by starch granules in the mixture to make the surimi more rigid. On the other hand, the addition of cryoprotectants, mannans, and HPMC improved the rheological properties of surimi. The data obtained in this paper could be beneficial particularly to the scientists who deal with food processing field.
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