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Search Results: 1 - 10 of 4675 matches for " Md Hasanuzzaman "
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Leaf Litter Decomposition and Nutrient Dynamics Associated with Common Horticultural Cropland Agroforest Tree Species of Bangladesh
Md. Hasanuzzaman,Mahmood Hossain
International Journal of Forestry Research , 2014, DOI: 10.1155/2014/805940
Abstract: Mangifera indica, Zizyphus jujuba, Litchi chinensis, and Artocarpus heterophyllus are the most common cropland agroforest horticultural tree species of Bangladesh. This study focused on leaf litter decomposition and nutrient (N, P, and K) dynamics during the decomposition process. This experiment was conducted for 180 days by using litter bag technique during dry and wet seasons. Mass loss was the highest (49% and 57%) for A. heterophyllus and the lowest (25%) was found for L. chinensis. The highest initial rates (0.75% and 2.35%/day) of decomposition were observed for Z. jujuba and the lowest (0.50% and 0.79%/day) for L. chinensis. The highest decay constant was observed for A. heterophyllus (2.14 and 2.34) and the lowest (0.88 and 0.94) for L. chinensis. Leaf litter of all the studied species showed a similar pattern (K > N > P) of nutrient release during the decomposition process. Zizyphus jujuba showed comparatively higher return of N, P, and K than others. However, a significant ( ) higher amount of mass loss, rate of decomposition, decay constant, and amount of nutrient return from leaf litter were observed during the wet season. 1. Introduction Bangladesh is a developing country where agriculture is the major economic activity. Farmers plant trees in the croplands for the increased production of timber, fodder, fuel wood, fruits, herbal medicines, raw material for small cottage industries, and short-term nontimber products and for environmental and ecological benefits [1–4]. Agroforestry promotes more efficient cycling of nutrients than traditional agriculture systems. It is also more sustainable and better for the environment [5–7]. A wide variety of horticultural tree species are used in different croplands and/or forms of agroforestry in Bangladesh [8–10]. Nutrients are uptaken by plants for their growth and development and a portion of these nutrients is accumulated in plant body [11, 12]. Conversely, a considerable amount of nutrients are returned to the soil through litter fall which has an important role in the biogeochemical cycling of nutrients [13, 14]. Litter improves soil quality through adding the organic matter and nutrients to the soil [15–17]. Leaf litter is the main and fastest source of organic matter and nutrient to the soil compared to other litter types [6, 18, 19]. The nutrients in litter were added to the soil through microbial decomposition and physical leaching of soluble components followed by microbial oxidation of refractory components [18, 20–22]. However, the amount of nutrient addition through litter decomposition
EVALUATION OF ANTIBACTERIAL ACTIVITY OF STUDY OF LEAVES OF TABERNAEMONTANA DIVARICATA (L)
Rahman Md. Ashikur,Md. Hasanuzzaman,Rahman Md,Rahman Md. Mofizur
International Research Journal of Pharmacy , 2011,
Abstract: Phytochemical analysis of the dried leaves of Tabernaemontana divaricata (L). (Apocynaceae) indicated the presence of a steroids,tannins, saponins, gums and reducing sugar. The pharmacological interest of these compounds, coupled with the use of this plant in traditional medicine prompted the authors to check for its possible antibacterial activity. The extracts (ethanol, petroleum ether, diethyl ether, methanol and aqueous) were found to possess maximum potency against infectious pathogens Staphylococcus saprophyticus, Staphylococcus aureus, Enterococcus facealis, Staphylococcus pyogenes, Streptococcus agalactae, Salmonella typhi, Escherichia coli, Shigella boydii, Shigella dysenteriae and Pseudomonas aeruginosa. The zone of inhibition was observed with almost all bacteria with some exceptions. Minimum inhibitory concentrations of the extracts were found to be significant. The obtained results provide a support for the use of this plant in traditional medicine and its further investigation.
A Study on Tomato Candy Prepared by Dehydration Technique Using Different Sugar Solutions  [PDF]
Md. Hasanuzzaman, M. Kamruzzaman, Md. Mominul Islam, Sultana Anjuman Ara Khanom, Md. Mashiar Rahman, Laisa Ahmed Lisa, Dipak Kumar Paul
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.513137
Abstract: The aim of the research was to develop a self-stable dehydrated tomato product using different sugar solutions and to study the effects of the sugar solution on the characteristic of tomato candy. Tomato was immersed into the sugar solution with the concentrations of 40%, 50% and 60% for 24 hours. Moisture, ash, protein, fat, vitamin C, acidity, total sugar, crude fiber, total SO2 and salt content and organoleptic quality and microbiological status of the prepared candy were analyzed. There was a tendency of decreasing moisture, ash, protein, fat, vitamin C, acidity, crude fiber and increasing total sugar content with increased concentration of sugar solution used. On the microbiological analysis, total bacteria and total fungus load were increased with increasing the concentration of sugar solution. The best characteristic of tomato candy was found with 40% sugar solution, with highest nutrient and sensory score and lowest microbial load than candy prepared with 50% and 60% sugar solution.
Ratoon Rice Response to Different Fertilizer Doses in Irrigated Condition
Muhammad SHAMIUL ISLAM,Mirza HASANUZZAMAN,Md. ROKONUZZAMAN
Agriculturae Conspectus Scientificus (ACS) , 2008,
Abstract: The response of different fertilizer doses was studied on the ratoon crop as well as main crop. The different fertilizer doses under the study were F1 (N=90, P2O5 = 45, K2O=50, S=13, Zn = 4: in kg ha-1), F2 (N=105, P2O5 = 55, K2O=60, S=13, Zn = 4: in kg ha-1), F3 (N=120, P2O5 = 65, K2O=70, S=13, Zn = 4: in kg ha-1), F 4(N =135, P2O5 =75, K2O=80, S=13, Zn=4: in kg ha-1) and F5 (N=150, P2O5 = 85, K2O = 90, S=13, Zn = 4: in kg ha-1). In the main crop, the highest grain and biological yields were produced by F3 dose. The highest straw yield was produced by F4 dose. The lowest grain yield and the lowest biological yield were produced by F1 dose and the lowest straw yield was produced by F2 dose. The highest crop duration was found using F1 dose and the shortest crop duration was found using F3 doses. In the ratoon crop, the highest grain yield, straw yield and biological yield was produced by F5 dose whereas the lowest grain yield, straw yield and biological yield was achieved with F1 dose. The longest crop duration was observed using F2 dose and the shortest crop duration was recorded using F5 dose.
Antinociceptive and bioactivity of leaves of Murraya paniculata (L.) Jack, Rutaceae
Sharker, Shazid Md.;Shahid, Israt Jahan;Hasanuzzaman, Md.;
Revista Brasileira de Farmacognosia , 2009, DOI: 10.1590/S0102-695X2009000500016
Abstract: the results of antinociceptive and toxicological studies on the ethanol extract of the leaves of murraya paniculata (l.) jack, rutaceae, are reported. the extract (250 and 500 mg/kg dosages) was found to produce a profound antinociceptive activity in a dose dependent manner. the extract showed considerable brine shrimp toxicity (ld50 = 32 μg/ml).
Design of Universal Shift Register Using Reversible Logic
Md. Selim Al Mamun,Indrani Manda,Md. Hasanuzzaman
International Journal of Engineering and Technology , 2012,
Abstract: Reversible sequential circuits are considered the significant memory block for their ultra-low power consumption. Universal shift register is an important memory element of the sequential circuit family. In this paper we proposed efficient design of reversible universal shift register that is optimized in terms of quantum cost, delay and garbage outputs. Appropriate theorems and lemmas are presented to clarify the proposed designs and establish its efficiency.
Efficacy of different herbicides over manual weeding in controlling weeds in transplanted rice
Mirza Hasanuzzaman,Md. Obaidul Islam,Md. Shafiuddin Bapari
Australian Journal of Crop Science , 2008,
Abstract: An experiment was conducted on transplanted Aman (monsoon) rice at the Sher-e-Bangla Agricultural University farm Dhaka (90033′ E longitude and 23077′ N latitude), Bangladesh during June-November, 2005. There were seven different weed control treatments viz. T1= Amchlor 5G @ 15 kg ha-1 + IR5878 50 WP @ 120 g ha-1, T2= Ronstar 25EC @ 1.25 L ha-1 + IR5878 50 WP @ 120 g ha-1, T3= IR5878 50 WP @ 150 g ha-1, T4= IR5878 50 WP @ 120 g ha-1, T5= Set-off 20WG @ 50 g ha-1 + IR5878 50 WP @ 120 g ha-1, T6= Two hand weeding and T7= Weedy check. There were 14 different weed species infested the field among which Panicum repens was the most important. Among the herbicides T2 was the most efficient with the lowest weed population and weed dry weight. The yield and the yield contributing characters (plant height, number of effective tillers per hill, panicle length and no. of filled grains) were influenced according to the effectiveness of the treatments, with T2 being the highest yielding herbicide treatment, reaching the yield level of the hand weeding treatments (T6). Maximum benefit-cost ratio with T2 suggested that this herbicidal treatment can be used as an alternative when labour is a limiting factor in producing transplant Aman rice
Efficient Design of Reversible Sequential Circuit
Md. Selim Al Mamun,Indrani Mandal,Md. Hasanuzzaman
Computer Science , 2014, DOI: 10.9790/0661-0564247
Abstract: Reversible logic has come to the forefront of theoretical and applied research today. Although many researchers are investigating techniques to synthesize reversible combinational logic, there is little work in the area of sequential reversible logic. Latches and flip-flops are the most significant memory elements for the forthcoming sequential memory elements. In this paper, we proposed two new reversible logic gates MG-1 and MG-2. We then proposed new design techniques for latches and flip-flops with the help of the new proposed gates. The proposed designs are better than the existing ones in terms of number of gates, garbage outputs and delay.
Quality Evaluation of Ginger Candy Prepared by Osmotic Dehydration Techniques  [PDF]
Md Sahin Alam, M. Kamruzzaman, Sultana Anjuman Ara Khanom, Mohammad Robel Hossen Patowary, Md Toufiq Elahi, Md Hasanuzzaman, Dipak Kumar Paul
Food and Nutrition Sciences (FNS) , 2018, DOI: 10.4236/fns.2018.94030
Abstract: The study was carried out to develop and compare Ginger candy from fresh indigenous and China Ginger. Ginger was immersed into the sugar solution with the concentrations of 50%, 60% and 70% sugar solution. Moisture, ash, protein, fat, crude fiber and total sugar content and organoleptic quality and microbial status of the prepared candy were analyzed. Moisture, ash, protein, fat and crude fiber content was found to be lower with increased concentration of sugar solution used, whereas total sugar content was found to be higher. Total bacterial count was increased with increasing the concentration of sugar solution. The best characteristic of Ginger candy was found with 50% sugar solution, with highest nutrient and lowest microbial load than candy prepared with 60% and 70% sugar solution.
An Edgeworth Box Approach toward Conceptualising Economic Integration  [PDF]
Hasanuzzaman Zaman
Modern Economy (ME) , 2011, DOI: 10.4236/me.2011.21010
Abstract: The joint-communiqué originating from the January 2010 summit between India and Bangladesh has opened new doors of opportunities for addressing economic integration not just between India and Bangladesh, but across the South Asian region. In this article, an Edgeworth Box approach has been deployed to help con-ceptualise the various Pareto-optimal solutions that are to be realised through close bilateral cooperation in particular. The article attempts to address some of the issues deterring establishment of trade and transport integration between Bangladesh and India, which are also relevant from the perspective of the entire South Asia region.
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