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Search Results: 1 - 10 of 542908 matches for " M. L. Rahman "
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Efficacy of V4HR Newcastle Disease (V4HR-ND) Vaccine in Broiler Birds in Bangladesh
M.B. Rahman,M.M. Rahman,M. Rahman,S.M.L. Kabir
International Journal of Poultry Science , 2004,
Abstract: Thirty day-old chicks of Cobb-100 breed with the history of vaccination of parent stock against Newcastle disease (ND) were equally divided into two groups such as group A and B. At 7 days of age of birds, group A was vaccinated with experimentally prepared V4HR-ND vaccine via eye drop @ 106.0EID50/bird to determine the efficacy of this vaccine while group B was kept as unvaccinated control. The birds were used for the study during the period from October 2003 to December 2003. Each bird of group A was boostered with same vaccine @ same dose at 24 days of age. Both the groups (A and B) were challenged after two weeks of post-booster vaccination with 0.25ml inoculum containing 105.0EID50 of virulent field isolates of ND virus intramuscularly. The results of challenge experiment revealed that six birds (40%) of group A succumbed within 3 to 4 days of post-challenge, whereas 15 (100%) unvaccinated control birds of group B showed clinical illness and ultimately died within 3 to 5 days. Thus, the experimental V4HR-ND vaccine conferred 60% protection of vaccinated birds against challenge infection. The mean values of Haemagglutination inhibition (HI) antibody titres of birds in group A were found to have significantly (P<0.01) increased at two weeks of post-booster vaccination. These results indicated that experimental V4HR-ND vaccine induced sufficient humoral immune response which gives satisfactory level of protection against ND.
Magnetic Hysteresis and Complex Initial Permeability of Cr3+ Substituted Mn-Zn Ferrites  [PDF]
F. Alam, M. L. Rahman, M. H. R. Khan, A. K. M. Akther Hossain
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.514122
Abstract:

The impact of Cr3+ ion on the magnetic properties of Mn0.50Zn0.50CrxFe2-xO4 (with x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) has been studied. Ferrite samples were synthesized by combustion method and sintered at various temperatures (1250°C, 1300°C and 1350°C). The structural properties were investigated by means of X-ray diffraction patterns and indicated that the samples possess single phase cubic spinel structure. The lattice parameter decreases with the increase in Cr3+ content, as the ionic radius of Cr3+ ion is smaller than that of Fe3+. The average grain size (D), bulk density (ρB) and initial permeability μidecreases with increase

The Dynamics of Probiotics on Growth Performance and Immune Response in Broilers
S.M.L. Kabir,M.M. Rahman,M.B. Rahman,M.M. Rahman
International Journal of Poultry Science , 2004,
Abstract: The research work was conducted on "Hubbard Isa Starbro" broilers to evaluate the dynamics of probiotics relating to live weight gain, carcass yield, weight of cut up meat parts and immune response. Day old broiler chicks were divided into four groups as group A (Vaccinated probiotics fed group), B (Nonvaccinated probiotics fed group), C (Vaccinated conventional fed group) and D (Nonvaccinated conventional fed group). Groups C and D were taken as control birds fed with commercial ration and groups A and B as experimental birds were fed with commercial ration with the addition of 2gm probiotics (Protexin Boost)/10 litres drinking water upto 6th week of age. The result evidenced the following information: (a) The live weight gains obtained were significantly (p<0.01) higher in experimental birds as compared to control ones at all levels during the period of 2nd, 4th, 5th and 6th weeks of age, both in vaccinated and nonvaccinated birds. (b) A significantly (p<0.01) higher carcass yield occurred in broiler chicks fed with the probiotics on the 2nd, 4th and 6th week of age both in vaccinated and nonvaccinated birds. The weight of leg was found significantly (p<0.01) greater for experimental birds as compared to control ones on the 2nd, 4th and 6th week of age. A significantly (p<0.01) higher breast weight in broiler chicks fed with the probiotics was observed on the 4th and 6th week of age. Analogously a significantly (p<0.05) higher breast portion weight was found in experimental birds as compared to control ones during 2nd week of age. (c) The antibody production was found significantly (p<0.01) higher in experimental birds as compared to control ones. Significant differences were also observed in the weight of spleen and bursa due to probiotics supplementation. The results of the study thus revealed that probiotics supplementation promoted significant influence on live weight gain, high carcass yield, prominent cut up meat parts and immune response.
Determination of the Metastable Zone Width, Nucleation Kinetics, Structural and Optical Properties of KCl Doped KAP Crystal  [PDF]
M. A. Rahman, M. M. Rahman
Journal of Crystallization Process and Technology (JCPT) , 2015, DOI: 10.4236/jcpt.2015.52005
Abstract: Slow evaporation method was used to grow pure and KCl (10 mol%) doped KAP single crystal. The solubility and metastable zone width of aqueous solutions of pure and KCl (10 mol%) doped KAP crystal were evaluated to analyze the crystallization process. Measuring the induction period τ, the critical nucleation parameters like interfacial energy (σ), energy of formation of the critical nucleus (ΔG*) were determined using the classical theory of nucleation. The structural properties and optical constants of the grown crystals have been put to test and observed that the addition of KCl results in an enhancement of properties of the crystal. Grown crystals were characterized by powder X-ray diffraction. FTIR spectra confirmed the presence of KCl in pure KAP crystal. UV- Visible spectroscopic studies revealed that addition of KCl in pure KAP crystal increased transparency from 75% to 80%. The analysis of the optical absorption data revealed the presence of both indirect and direct transitions and both of these band gaps increased with the addition of KCl. The transmittance data was analyzed to calculate the refractive index, oscillator energy, dispersion energy, electric susceptibility, zero-frequency dielectric constant and both the real and imaginary parts of the dielectric permittivity as a function of photon energy. The moments of ε(E) were also determined. The dispersion i.e. spectral dependence of the refractive index was discussed according to the single-effective oscillator model proposed by Wemple and DiDomenico.
Effect of Salinity on Germination and Seedling Growth of Brassica campestris Varieties
M. R. Islam,M. A. Quddus,L. Rahman
Pakistan Journal of Biological Sciences , 2001,
Abstract: Seven varieties of Brassica campestris were tested for germination percentage, days to germinate and plant height under different salinity levels of soil. The variations due to salinity levels, varieties and variety x salinity were significant for different characters. The regression coefficient estimates (curve estimation) indicated variable degrees of increase or decrease in performance as influenced by different salinity levels. The performance of the variety Safal in germination percent is the best followed by Tori-7, Sampad and Kallyania. Safal showed the best performance in days for germination followed by Sonali, Sampad and Dholi. Dholi and Sonali performed better than others in respect of plant height. Considering all the characters the performance of Sonali, Sampad and Dholi is much better than others against different levels of salinity.
Cost Effective GPS-GPRS Based Object Tracking System
Khondker Shajadul Hasan,Mashiur Rahman,Abul L. Haque,M Abdur Rahman
Lecture Notes in Engineering and Computer Science , 2009,
Abstract:
The Horizon of Unintentional Injuries among Children in Low-Income Setting: An Overview from Bangladesh Health and Injury Survey
S. M. Chowdhury,A. Rahman,S. R. Mashreky,S. M. Giashuddin,L. Svanstr m,L. G. H rte,F. Rahman
Journal of Environmental and Public Health , 2009, DOI: 10.1155/2009/435403
Abstract: Introduction. The paper aims to explore the magnitude and distribution of unintentional injuries among Bangladeshi children (<18 years). Methodology. A cross sectional survey was conducted during 2003 (January to December) in 12 randomly selected districts and Dhaka Metropolitan City of Bangladesh. Nationally representative data were collected from 171 366 households comprising of 351 651 children of under 18 years. Information includes the number of deaths and illness at the household in the preceding year. Verbal autopsy and verbal diagnosis form was used to determine the cause of mortality and morbidity respectively. Results. There were 351651 children in the study, of which 5577 had one or more injuries in the past one year. Drowning and falls was the leading cause of injury mortality and morbidity in children over 1 year of age respectively. Incidence of unintentional injuries was significantly higher among boys (95% CI = ? 2157.8) than girls (95% CI = 968.7 ? 1085.8) while rural children were the most vulnerable group. Home and its premises was the most common place for the injury incidence. Conclusion. The result of the study could be an insight to the policy makers to develop realistic and effective strategies to address the issue.
Viability of Probiotics in Balancing Intestinal Flora and Effecting Histological Changes of Crop and Caecal Tissues of Broilers
S.M.L. Kabir,M.M. Rahman,M.B. Rahman,M.Z. Hosain
Biotechnology , 2005,
Abstract: The present research was conducted on Hubbard Isa Starbro broilers to evaluate the dynamics of probiotics relating to balanced growth of intestinal flora and histological reactions and changes within the crop and cecal tissues. A total of eighty day-old broiler chicks were divided into four groups of equal numbers as group A (Probiotics fed group vaccinated), B (Probiotics fed group nonvaccinated), C (Conventional fed group vaccinated) and D (Conventional fed group nonvaccinated). Group C and D were taken as control birds fed with commercial ration and groups A and B as experimental birds were fed with commercial ration with the addition of 2 g probiotics (Protexin Boost)/10 L drinking water upto 6th week of age. The effect of probiotics with regard to clearing bacterial infections and regulating intestinal flora was evaluated by determining the TVC and TLC of the crop and cecum samples of probiotics and conventional fed groups at the 2nd, 4th and 6th week of age. The result revealed competitive antagonism. The result of the study evidenced that probiotic organisms inhibited some nonbeneficial pathogens by occupying intestinal wall space. It has been demonstrated that broilers fed with probiotics had a tendency to display pronounced intestinal histological changes such as active impetus in cell mitosis and increased nuclear size of cells, than the controls. It is obviously found from this research work that probiotics supplementation promoted significant influence on intestinal microbial balance related with pronounced intestinal histological changes.
Recombinant production and biochemical characterization of a hyperthermostable α-glucan/maltodextrin phosphorylase from Pyrococcus furiosus
Rahman M. Mizanur,Amanda K. K. Griffin,Nicola L. Pohl
Archaea , 2008, DOI: 10.1155/2008/549759
Abstract: Alpha-glucan phosphorylase catalyzes the reversible cleavage of α-1-4-linked glucose polymers into α-D-glucose-1-phosphate. We report the recombinant production of an α-glucan/maltodextrin phosphorylase (PF1535) from a hyperthermophilic archaeon, Pyrococcus furiosus, and the first detailed biochemical characterization of this enzyme from any archaeal source using a mass-spectrometry-based assay. The apparent 98 kDa recombinant enzyme was active over a broad range of temperatures and pH, with optimal activity at 80 °C and pH 6.5–7. This archaeal protein retained its complete activity after 24 h at 80 °C in Tris-HCl buffer. Unlike other previously reported phosphorylases, the Ni-affinity column purified enzyme showed broad substrate specificity in both the synthesis and degradation of maltooligosaccharides. In the synthetic direction of the enzymatic reaction, the lowest oligosaccharide required for the chain elongation was maltose. In the degradative direction, the archaeal enzyme can produce glucose-1-phosphate from maltotriose or longer maltooligosaccharides including both glycogen and starch. The specific activity of the enzyme at 80 °C in the presence of 10 mM maltoheptaose and at 10 mg ml–1 glycogen concentration was 52 U mg–1 and 31 U mg–1, respectively. The apparent Michaelis constant and maximum velocity for inorganic phosphate were 31 ± 2 mM and 0.60 ± 0.02 mM min–1 µg–1, respectively. An initial velocity study of the enzymatic reaction indicated a sequential bi-bi catalytic mechanism. Unlike the more widely studied mammalian glycogen phosphorylase, the Pyrococcus enzyme is active in the absence of added AMP.
The Behaviour of 1,2,3-Indantrione Towards Wittig-Horner Reagents
N. M. Abd El-Rahman,L. S. Boulos
Molecules , 2002, DOI: 10.3390/70100081
Abstract: Wittig-Horner reagents 1a,b react with 1,2,3-indantrione (2) to give the dimeric adducts 3a and 3b, respectively. Moreover, 2 reacts with tert-butyl diethylphosphonoacetate (1c) yielding the ethylenic compound 4. On the other hand, 2 reacts with 1d to yield the phosphonate adduct 5. Mechanisms accounting for the formation of the new products are discussed and the probable structures of the products are presented based on compatible analytical and spectral data.
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