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Ethnomedicinal, phytochemical, and pharmacological profile of the genus Dalbergia L. (Fabaceae)
Sanjib Saha, Jamil A. Shilpi, Himangsu Mondal, Faroque Hossain, Md. Anisuzzman, Md. Mahadhi Hasan, Geoffrey A. Cordell
Phytopharmacology , 2013,
Abstract: Cadmium (Cd) is considered as one of the most toxic transition metal elements that can cause severe damage to testis. Withania sominifera Linn. (W. somnifera) is an Indian medicinal plant rich in bioactive and bio-available was tested for Cd induced toxicity. Male Wistar albino rats were used to collect data - control, cadmium treated (CdT), cadmium and W. somnifera (CdT + WS), cadmium and Vitamin E (CdT+Vit E), and control and W. somnifera. After 30 days, testes were procured and used for various investigations including histology, immuno-staining for iNOS and MnSOD, Western-blot analysis of caspase-3 and estimation of antioxidants, RO-S and LPO. The CdT rat testis showed significant reduction in testicular weight and volume, decline in LPO level, significant reduction in SOD, CAT, GPX, GST and GSH, Vitamin C and E. Histological observations showed necrotic and apoptotic changes. Increased expression of iNOS and decrease in MnSOD indicates oxidative stress in the cellular milieu. Increased expression of caspase-3 indicates upregulation apoptotic signal in CdT rat testis. These shifts were significantly reduced in CdT+WS and CdT+Vit E testes. Relatively, CdT+WS testis was well preserved, this study indicate the ameliorative effects of W. somnifera by anti-oxidant and antiperoxidative potentials.
PHYTOCHEMICAL SCREENING AND THE EVALUATION OF THE ANTIOXIDANT, ANTIMICROBIAL AND ANALGESIC PROPERTIES OF THE PLANT IPOMOEA MAURITANA (FAMILY: CONVOVULACEAE)
Monjur-Al-Hossain A.S.M.,Mahadhi Hasan Md.,Khushi shamsunnahar,Dey Avijit
International Research Journal of Pharmacy , 2013,
Abstract: Ipomoea mauritiana is an important medicinal plant having widespread application in a variety of disorders. The aim of this study was the phytochemical investigation and evaluation of the anti-oxidant, anti-microbial and analgesic activities of the whole plant Ipomoea mauritiana. Phytochemical screening of the ethanolic extract of Ipomoea mauritiana ensured the presence of Alkaloids, Tannins, Steroids, Gums, Glycosides, Carbohydrate and Saponins. The anti-oxidant activity was measured by DPPH free radical scavenging activity (IC50 = 164 μg/ml). The crude ethanolic extract did not reveal any significant anti-microbial activity. The crude ethanolic extract of the tubers of Ipomoea mauritiana exhibited significant analgesic activity at a dose of 250 mg/kg and 500 mg/kg with 71.15% and 80.77 % inhibition of writhing respectively.
Estimation of Vitamins B-Complex (B2, B3, B5 and B6) of Some Leafy Vegetables Indigenous to Bangladesh by HPLC Method  [PDF]
Md. Nazmul Hasan, M. Akhtaruzzaman, Md. Zakir Sultan
Journal of Analytical Sciences, Methods and Instrumentation (JASMI) , 2013, DOI: 10.4236/jasmi.2013.33A004
Abstract:

The current experiment was conducted for the simultaneous determination of several water-soluble vitamins like ribo- flavin (vitamin B2), niacin (vitamin B3), pantothenic acid (vitamin B5) and pyridoxine (vitamin B6) in five highly con- sumed local leafy vegetables named as bottle gourd leaves (Lagenaria vulgaris) (local name Lau shak), green amaranth leaves (Amaranthus viridis) (local name Data shak), red amaranth leaves (Amaranthus gangeticuss) (local name Lal shak), Indian spinach (Basella alba) (local name Pui shak) and bitter gourd leaves (Momordica charantia) (local name Korola shak). The analyses were performed by HPLC using an analytical reversed phase C-18 (ODS column, 250 × 4.6 mm, 5 μm, Phenomenex, Inc.) column with the mobile phase consisting of a mixture of buffer (hexane sulphonic acid sodium, potassium dihydrogen phosphate and triethylamine, pH 3.0) and methanol in the ratio of 96:4 (v/v) at a flow rate of 1 mL/min with UV detection at 210 nm. The retention times for the vitamins were obtained as 3.61 min, 6.37 min, 9.51 min and 11.51 min for Vitamins B2, B3, B5 and B6, respectively. These obtained values of the vitamins were compared with the values available in published literatures of Deshio Khaddar Pustiman (DKPM), Indian food value (IFV) and United States Department of Agriculture (USDA).

Effect of Gamma Irradiation Doses on Morphological and Biochemical Attributes of Grape Saplings  [PDF]
A. F. M. Saiful Islam, M. Muzahedul Islam, Md. Mehedi Hasan, Md. Mehedi Hasan
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.65050
Abstract: The demand of grape in Bangladesh is fulfilled through import from foreign countries. The fruits of local cultivars of grapes are sour and seeded. Development of seedless grape varieties having increased sweetness, higher yield with better nutritional quality is necessary to reduce the import dependency. The present research activities are the part of a grape improvement project. A pot experiment was conducted at the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, during June to November 2011 to determine the suitable gamma irradiation doses on growth, leaf area and biochemical characters of grape saplings. Three vegetative bud stages viz. bud initiation stage, 4-leaf stage and 8-leaf stage, and four doses of gamma irradiation viz. 0, 5, 10, and 15 Gy were used as treatments. The experiment was laid out in a Randomized Complete Block Design with four replications. Different irradiation doses and vegetative bud stages showed significant variations in respect of plant growth characters, leaf area, soluble protein and total sugar content. Interaction effects also had significant variations on most of the parameters studied. Higher doses of gamma irradiation had showed detrimental effect on grape saplings. Generally, increased in irradiation doses showed decreased and detrimental effects on most of the parameters under study. Maximum numbers and length of roots, total dry matter, leaf area and chlorophyll-a and chlorophyll-b content were found at 5 Gy irradiation dose. Total soluble protein and sugar content of leaf were found maximum at no irradiation and 15 Gy, respectively. Higher number of roots and length, total dry matter, leaf area, chlorophyll-a, and b and soluble protein content of leaf were observed at bud initiation stage while 8-leaf stage showed maximum total sugar of leaf. In the combined effect of gamma irradiation and vegetative bud stages, all parameters showed best results in 5 Gy with bud initiation stage except total sugar content of leaf.
Ion-Acoustic Higher Order Non-Linear Structures in Quantum Dusty Plasma  [PDF]
Md Manir Hossain, Monirul Hasan, Md A saduzzaman, Md Mahfuzul Haque
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.411187
Abstract:

The prominent features of higher order nonlinear ion-acoustic waves involving quantum corrections in an unmagnetized quantum dusty plasma are revisited with the theoretical framework of Hossain et al. [1]. The fluid model is demonstrated here by its constituent inertial ions, Fermi electrons with quantum effect, and immovable dust grain with negative charge. We have used the ideology of Gardner equation. The well-known RPM method is employed to derive the equation. Indeed, the basic features of quantum dust ion-acoustic Gardner solitons (GSs) are pronounced here. GSs are shown to exist for the value of dust to ion ratio around 2/3 which is valid for space plasma [2], and are different from those of K-dV (Korteweg-de Vries) solitons, which do not exist for the value around 2/3. The implications of our results are suitable for cosmological and astrophysical environments.

An Improved Model for FE Modeling and Simulation of Closed Cell Al-Alloy Foams
MD. Anwarul Hasan
Advances in Materials Science and Engineering , 2010, DOI: 10.1155/2010/567390
Abstract: Cell wall material properties of Al-alloy foams have been derived by a combination of nanoindentation experiment and numerical simulation. Using the derived material properties in FE (finite element) modeling of foams, the existing constitutive models of closed-cell Al-alloy foams have been evaluated against experimental results. An improved representative model has been proposed for FE analysis of closed-cell Al-alloy foams. The improved model consists of a combination of spherical and cruciform-shaped cells similar to those of Meguid et al.'s cruciform-hemisphere model (Finite Elem. Anal. Design: 2002, 38, 631). However, the spherical cells, which are smaller in size, are made of thicker cell walls in the new improved model compared to the cruciform-shaped cells, based on observation of the underlying Al-alloy foams. The compressive mechanical properties of Al-3wt.%Si-2wt.%Cu-2wt.%Mg alloy foams of relative density 12%–20% have been obtained by simulation using the improved representative model. While the traditional foam models overpredict the foam strength, the new weaker-cruciform-stronger-hemisphere model is found to predict the foam properties with much better accuracy. It is found that the proposed new model is capable of producing all three different types of deformation pattern of closed-cell metal foams, namely, uniform deformation, layerwise deformation, and the progressive deformation from the locations of lowest densities and highest impurities to those of higher densities and lower impurities. 1. Introduction Light weight metallic foams can be used in the construction of composite panels, foam-filled shells and tubes, and many other lightweight composite structures [1] with high structural efficiency. A huge volume of literature already exists on the production [2–4], characterization [5–12], numerical simulation [13], and industrial application [14–17] of Al-alloy foams. This study particularly deals with the modeling and simulation of closed-cell Al-alloy foams for numerical study of its mechanical properties and deformation behaviors. As pointed out by Santosa and Wierzbicki [18], the major difficulty in predicting the crushing strength of closed-cell aluminum foams through numerical simulation lies in obtaining their cell wall material properties. In recent research publications, for example, see [5], it has been shown that the material properties of Al-foam cell wall can be identified by performing nanoindentation test on the cell wall and simulating the test results using numerical FE codes. Thus, the difficulties in obtaining
Investigation of the Effect of Traffic Parameters on Road Hazard Using Classification Tree Model
Md. Mahmud Hasan
International Journal for Traffic and Transport Engineering , 2012,
Abstract: This paper presents a method for the identification of hazardous situations on the freeways. For this study, about 18 km long section of Eastern Freeway in Melbourne, Australia was selected as a test bed. Three categories of data i.e. traffic, weather and accident record data were used for the analysis and modelling. In developing the crash risk probability model, classification tree based model was developed in this study. In formulating the models, it was found that weather conditions did not have significant impact on accident occurrence so the classification tree was built using two traffic indices; traffic flow and vehicle speed only. The formulated classification tree is able to identify the possible hazard and non-hazard situations on freeway. The outcome of the study will aid the hazard mitigation strategies.
Synthesis and Characterization of Trivalent Cerium Complexes of p-tert-Butylcalix[4,6,8]Arenes: Effect of Organic Solvents
Md. Hasan Zahir
Journal of Chemistry , 2013, DOI: 10.1155/2013/494392
Abstract:
Diagnosis of Process Nonlinearities and Valve stiction: Data Driven Approaches By M.A.A. Shoukat Choudhury, Sirish L. Shah, Nina F. Thornhill (Springer-Verlag, ISBN: 978-3-540-79223-9, 2008)
Md Kamrul Hasan
Chemical Engineering Research Bulletin , 2010, DOI: 10.3329/cerb.v14i1.5048
Abstract:
Using Chinese Text Processing Technique for the Processing of Sanskrit Based Indian Languages: Maximum Resource Utilization and Maximum Compatibility
Md Maruf Hasan
Computer Science , 1995,
Abstract: Chinese text processing systems are using Double Byte Coding , while almost all existing Sanskrit Based Indian Languages have been using Single Byte coding for text processing. Through observation, Chinese Information Processing Technique has already achieved great technical development both in east and west. In contrast,Indian Languages are being processed by computer, more or less, for word processing purpose. This paper mainly emphasizes the method of processing Indian languages from a Computational Linguistic point of view. An overall design method is illustrated in this paper.This method concentrated on maximum resource utilization and compatibility: the ultimate goal is to have a Multiplatform Multilingual System. Keywords Text Procrssing, Multilingual Text Processing, Chinese Language Processing, Indian Language Processing, Character Coding.
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