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Search Results: 1 - 10 of 405768 matches for " M Samsul Islam2 "
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Studies on the reconstitution properties of stored dried spotted spanish mackerel (Scomberomorus guttatus)
Shamima Prodhan 1* , M Kamrujjaman 1 , M Afzal Hossain 2 , M Samsul Islam2
International Journal of Biosciences , 2011,
Abstract: A study was carried out to compare and evaluate the percentage of reconstitution media (tap water, hot water, 5% NaCl and 5% Ca(OH)2) uptake of stored dried control, irradiated (1 kGy) and heat treated (50 °C) spotted spanish mackerel Scomberomorus guttatus at room temperature for 1, 4 and 24 dipping hours upto 180 days of storage period after each 30 days of intervals. Maximum media uptake found in 5% Ca(OH)2followed by 5% NaCl, hot water and tap water in all samples. The highest (121.81%) and lowest (4.07%) percentage of media uptake observed in Ca(OH)2 and tap water respectively from the irradiated fish sample. This study also reveals that percentage of media uptake depends on reconstitution medias and dipping hours significantly but not with the various samples.
Comparative study on some morphological features of six selected and one standard clones of Bangladesh Tea [Camellia sinensis (L) O. Kuntze]
M Abdul Aziz 1* , Bulbul Ahmed 2 , Mohammad Anowar Razvy 2 , M Rezaul Karim2 , Rafiul Islam2 , S Kamal Lanchue Haque 1 , Monzur Hossain 2
International Journal of Biosciences , 2011,
Abstract: An attempt was made to study several parametric characteristics of stems and leaves of six selected and one standard clones of Bangladesh tea in order to identify and select superior clone in tea. Out of ten morphological characters, two characters of stem (stem circumference and height of the first branching position), five characters of 5thleaf (leaf length, leaf breadth, leaf length/breadth ration, leaf size and leaf angle in degree) and three characters of pluckable shoots (internodal length, shoot density and yield of green leaf as well as made tea per hector) were considered qualitatively and quantitatively following IPGRI’s guidelines with some minor adjustment and analyzed statistically. It was noticed that all clones were significantly different in respect of stem circumference, leaf length, leaf breadth, leaf length/breadth ratio, leaf size, leaf angle, internodal length of fish leaf to mother leaf, shoot density and yield. Considering different morphological and yield character MZ/39 was found most suitable followed by B2 × T1 and SDL/1 for commercial cultivation in Bangladesh.
In vitro antimicrobial and cytotoxicity screening of Terminalia arjuna ethanol extract
M Alam Morshed 1* , Azim Uddin 1 , Akhlaqur Rahman 1 , Tahrim Hasan 1 , Saurov Roy 1 , Abdullah Al Amin 1 , Rajibul Ahsan 1 , Rezuanul Islam2
International Journal of Biosciences , 2011,
Abstract: The present study was carried out to evaluate the antibacterial and cytotoxic activity of 50% ethanol extract of bark from Terminalia arjuna on selected four Gram positive and eight Gram negative bacterial strains. The bark extract of Terminalia arjuna showed potential antimicrobial activities against all of the selected strains of microorganisms and the greatest activity was observed against Shigella dysenteriae. For antimicrobial test, Disc diffusion technique was used and the zone of inhibition of microorganisms was measured in mm. In vitro cytotoxicity test was also studied by Brine Shrimp Lethality Bioassay and results illustrated significant (p<0.05) cytotoxicity against A. salina, that were expressed as LC50. Terminalia arjunaethanol extract showed brine shrimp cytotoxicity with lethal concentration 50 (LC50) value of 50.11 μg/ml.
Comparative Epidemiological Study of Infectious Bursal Disease of Commercial Broiler Birds in Bangladesh and China
Md Harunur Rashid, Chunyi Xue, Md Taohidul Islam1, Md Rafiqul Islam2, Zheng She and Yongchang Cao*
Pakistan Veterinary Journal , 2013,
Abstract: A systematic field study was undertaken on the outbreaks of infectious bursal disease (IBD) during the period from June 2010 to May 2011 in commercial broiler farms of Bangladesh (562) and China (89). Overall prevalence due to the disease was recorded as 12.1 and 7.1% for Bangladesh and China, respectively, and mortality rate was 5.3 and 2.4% for Bangladesh and China, respectively. Dullness, depression, anorexia, ruffled feathers, inability to move and yellowish white diarrhea were observed in almost all the IBD-affected flocks. At necropsy, the gross lesions were observed mainly in the bursa of Fabricius followed by changes in thigh and breast muscles. Outbreaks of the disease were recorded throughout the year. Seasonal influence of IBD showed a significantly (P<0.05) higher prevalence 13.5% and mortality rate 7.7% in winter season in Bangladesh. On the other hand, in China, significantly higher prevalence 6.5% and mortality rate 3.2% was found in summer season. Significantly higher prevalence and mortality rate was observed in the young birds (≤5 weeks of age) than older birds in both the countries. The outbreak of IBD was also found in vaccinated birds (P<0.05) of the two countries. The findings of the study indicated the difference of occurrence of IBD in Bangladesh and China, thereby would help to develop appropriate control strategies for both the countries
Genetic variation of wild and hatchery populations of the catla Indian major carp (Catla catla Hamilton 1822: Cypriniformes, Cyprinidae) revealed by RAPD markers
Rahman, S.M. Zakiur;Khan, Mukhlesur Rahman;Islam, Shahidul;Alam, Samsul;
Genetics and Molecular Biology , 2009, DOI: 10.1590/S1415-47572009005000013
Abstract: genetic variation is a key component for improving a stock through selective breeding programs. randomly amplified polymorphic dna (rapd) markers were used to assess genetic variation in three wild population of the catla carp (catla catla hamilton 1822) in the halda, jamuna and padma rivers and one hatchery population in bangladesh. five decamer random primers were used to amplify rapd markers from 30 fish from each population. thirty of the 55 scorable bands were polymorphic, indicating some degree of genetic variation in all the populations. the proportion of polymorphic loci and gene diversity values reflected a relatively higher level of genetic variation in the halda population. sixteen of the 30 polymorphic loci showed a significant (p < 0.05, p < 0.01, p < 0.001) departure from homogeneity and the fst values in the different populations indicated some degree of genetic differentiation in the population pairs. estimated genetic distances between populations were directly correlated with geographical distances. the unweighted pair group method with averages (upgma) dendrogram showed two clusters, the halda population forming one cluster and the other populations the second cluster. genetic variation of c. catla is a useful trait for developing a good management strategy for maintaining genetic quality of the species.
PID Fuzzy Logic Controller System for DC Motor Speed Control
H. Samsul Bachri M.
Makara Seri Teknologi , 2004,
Abstract: A good controller system must have resilience to disturbance and must be able to response quickly and accurately. Problem usually appears when PID controller system was built sensitively hence the system’s respon to the disturbance will yield big overshot/undershot then the possibility of oscillation to be happened is excelsior. When the controller system was built insensitively, the overshot/undershot will be small but the recovery time will be longer. Hybrid controller system could overcome those problems by combining PID control system with fuzzy logic. The main control of this system is PID controller while the fuzzy logic acts to reduce an overshot/undershot and a recovery time. The fuzzy logic controller is designed with two input error and delta error and one output of the motor speed. The output of fuzzy logic controller should be only half of the PID controller for limiting entirely fuzzy output. This hybrid system design has a better respon time controller system than PID controller without fuzzy logic.
Characterization of different strains of common carp (Cyprinus carpio L.) (Cyprinidae, Cypriniformes) in Bangladesh using microsatellite DNA markers
Mondol, Rashedul Kabir;Islam, Shahidul;Alam, Samsul;
Genetics and Molecular Biology , 2006, DOI: 10.1590/S1415-47572006000400009
Abstract: characterization of different strains of common carp (cyprinus carpio l.) using molecular markers is essential for the management of this fish in respect to the evaluation of the potential genetic effects induced by hatchery operations and the genetic improvement of carp varieties. five microsatellite loci (mfw1, mfw2, mfw11, mfw15 and mfw20) were analyzed for the molecular characterization of four common carp strains, i.e. scaled carp, mirror carp, red carp and koi carp. we observed differences in heterozygosities and the average numbers of alleles but not in polymorphic loci (p95) among the strains. koi carp displayed the highest level of variability in terms of heterozygosity. the nm values and the fst values indicated a low level of gene flow and high level of differentiation among the strains. the highest genetic distance was observed between the scaled carp and the koi carp whilst the lowest genetic distance was found between the red- and koi carp. the unweighted pair group method with averages (upgma) dendrogram resulted in two clusters, one containing only the scaled carp and the other the remaining three varieties. microsatellite markers have been found to be effective tools for characterization of different strains of common carp.
Comparative Study of Mortality Measures in Bangladesh During 1961-1991
1Md. Rafiqul Islam,2M. Korban Ali,3Md. Nurul Islam
Pakistan Journal of Social Sciences , 2012,
Abstract: The mortality measures such as Infant Mortality Rate (IMR), iIfant Death Rate (IDR), Crude Death Rate (CDR) and life expectancy at birth for male, female and both sexes of Bangladesh have been estimated using indirect techniques. It is observed that IMR and IDR are showing increasing trend during 1961-1974 and then started to decrease rapidly up to 1991. It is also seen that CDR for male, female and both sexes are showing decreasing trend during 1961-1991. On the other hand life expectancy at birth for male, female and both sexes are showing increasing trend during 1961-1991.
A biological tool to combat against multidrug-resistant Salmonella isolated from poultry of Chittagong City, Bangladesh
Mahbuba A1, Islam S2*, Mazumdar RM2, Fakruddin M2, Das S2, Bhuiyan H2 and Prodhan SH1
International Journal of Natural Sciences , 2012,
Abstract: Thirty two strains of Salmonella were isolated from the samples collected from different poultry farm of Chittagong City. Isolated organisms were then subjected to antibiotic sensitivity test against seven different standard antibiotics. Most of the strains tested were resistant to four antibiotics; 93.75% were resistant to co-trimaxazole, while 90.62% were resistant to cephotaxime, nalidixic acid and Tetracycline each. In this study, ciprofloxacin and gentamicin were found to be the most potent drugs, (78.125%) were sensitive to Ciprofloxacin & (78.125%) were sensitive to gentamicin. Antimicrobial activity of bark extract of T. arjuna against 13 selected isolates of Salmonella were then determined. During the course of the anti-microbial screening it was found that among the 13 selected isolates, Salmonella (L3-B1), Salmonella (L5-X4), Salmonella (F-X2) and Salmonella (S2-B1) showed good sensitivity to crude extract of T. arjuna.
Prevalence and Economic Significance of Caprine Fascioliasis at Sylhet District of Bangladesh
M. M. Hossain*, S. Paul, M. M. Rahman, F. M. A. Hossain1, M. T. Hossain2 and M. R. Islam
Pakistan Veterinary Journal , 2011,
Abstract: Caprine fascioliasis plays an important role of major constraints to small ruminant production in Bangladesh. This study was conducted in Sylhet district of Bangladesh to determine the prevalence of fascioliasis in Black Bengal goats of different age groups, sex and in seasons. In this study, livers of male and female goats were collected randomly from slaughter house during a period of 1 (one) year (October, 2007 to September, 2008). A total of 318 livers examined of which 66 were found to contain Fasciola gigantica. The overall prevalence rate was 20.75%. Fascioliasis was observed significantly higher in older (58.33%), female goats (36.79%) and during the rainy season (26.16%). The estimated economic losses due to condemnation of liver were 5.59% which amounted to US$ 115.44 per thousand liver of slaughtered goat. The prevalence was significantly different (P≤0.05) in different age groups and sex of the animals. The present study indicates that Fasciola infection in Black Bengal goats associated with age and sex of the animals; and seasons of the year. To control the disease in this area, appropriate preventive control strategies have to be designed to reduce the impact of the disease on goat production in Bangladesh.
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