oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 126 )

2018 ( 704 )

2017 ( 694 )

2016 ( 967 )

Custom range...

Search Results: 1 - 10 of 400833 matches for " M.M. Pervin "
All listed articles are free for downloading (OA Articles)
Page 1 /400833
Display every page Item
Biological Screening of Some Ferrocene Derivative Metal Complexes
M.E. Haque,M.Z. Rahman,M.M. Pervin,M.H. Kabir
Pakistan Journal of Biological Sciences , 2005,
Abstract: The aim of the present study was to investigate the antimicrobial and cytotoxic activities of five newly synthesized ferrocene based complexes [Mn(Fcd(COO)2), A], [Co(Fcd(COO)2), B], [Ni(Fcd(COO)2), C], [Cu(Fcd(COO)2), D] and [Zn(Fcd(COO)2), E]. The maximum antibacterial (at the concentration 100 μg disc-1) and antifungal (at the concentration 200 μg disc-1) activities were shown by the manganese complex A followed by cobult complexe B. The minimum activities were shown by zinc complexe E. The minimum inhibitory concentration of the complexes was determined against four pathogenic bacteria Bacillus subtilis, Bacillus megaterinum, Escherichia coli and Shigella shiga and the values of complex A were found between 16-32 μg mL-1. Brine shirmp bioassay lethality was carried out for cytotoxicity measurements of the complexes and the LC50 values were calculated after probit transformation of the resulting mortality data. Among the five complexes manganese complex A was showed highest cytotoxic effect which is indicative of its probable effect on cancer cell lines.
In vitro Antimicrobial and in vivo Cytotoxic Activity of Some Ferrocene Derivative Bioactive Metal Complexes of First Transition Series
M.E. Haque,M.Z. Rahman,M. Faruk Hossen,M.M. Pervin
Journal of Applied Sciences , 2006,
Abstract: The aim of the present study was to investigate the antimicrobial and cytotoxic activities of five newly synthesized ferrocene based complexes [Mn(FcCOO)2, A], [Co(FcCOO)2, B], [Ni(FcCOO)2, C], [Cu(FcCOO)2, D] and [Zn(FcCOO)2, E]. The maximum antibacterial (at the concentration 100 μg disc-1) and antifungal (at the concentration 200 μg disc-1) activities were shown by the manganese complex A followed by cobalt complex B. The minimum activites were shown by Zink complex E. The minimum inhibitory concentration of the complexes was determined against four pathogenic bacteria Bacillus subtilis, Bacillus megaterinum, Escherichia coli and Shigella shiga and the values of complex A were found between 16-32 μg mL-1. Brine shirmp lethality bioassay was carried out and all the complexes also showed cytotoxic effect compared with the standard bleomycin (0.41 μg mL-1).
Plant Regeneration from Axillary Shoots Derived Callus in Aristolochia indica Linn. an Endangered Medicinal Plant in Bangladesh
N.A. Siddique,M.A. Bari,M.M. Pervin,N. Nahar
Pakistan Journal of Biological Sciences , 2006,
Abstract: A procedure for rapid in vitro propagation of the aromatic and medicinal plant Aristolochia indica Linn. (Family: Aristolochiaceae) from axillary shoots is described. The highest percentage of callus induction was (95.00) on Murashige and Skoog (15) (MS) medium supplemented with 2.0 mg L-1 Kn and 1.0 mg L-1 BAP. Colour of the calli were mostly light green to dark green. Development of adventitious shoots occurred when the calli were subcultured in MS medium supplemented with BAP and Kn alone or in BAP combination with NAA and IAA or NAA, IAA and BAP in combination with Kn. The Highest percentage (95.00) of shoot regeneration was obtained in MS medium fortified with 2.5 mg L-1 Kn and 1.0 mg L-1 BAP. The elongated shoots developed roots on a medium containing 1 mg L-1 Kn. The rooted plants were transferred to soil.
Screeningof Endangered Medicinal Plants Species by Questionnaire Survey in Barind Tract in Bangladesh
N.A. Siddique,M.A. Bari,M.M. Pervin,N. Nahar
Pakistan Journal of Biological Sciences , 2005,
Abstract: This study deals with over two hundred medicinal plants of ethnobotanical importance, used by the village doctors especially village Kavirajs in Barind Tract for medicinal purposes. This study aims at the identification of endangered medicinal plants by questionnaire survey and also preservation and perpetuation of this knowledge of the local plants possessing medicinal properties for the benefit and further fruitful investigation on modern scientific lines.
Comparative Cytotoxicity Study of Six Bioactive Lectins Purified from Pondweed (Potamogeton nodosus Poir) Rootstock on Brine Shrimp
F. Pervin,M.M. Hossain,S. Khatun,S.P. Siddique
Journal of Medical Sciences , 2006,
Abstract: Six bioactive lectins were purified from the rootstock of Pondweeds (Potamogeton nodosus Poir) by conventional chromatographic methods. They showed cytotoxic effect in brine shrimp (Artemia salina L.) lethality bioassay. The LD-50 values of PNL-1, PNL-2, PNL-3, PNL-4, PNL-5 and PNL-6 were found to be 10.76, 7.03, 17.25, 10.52, 19.60 and 20.1 μg mL-1, respectively which implied that they have significant uses specially of PNL-2. Experimental results revealed that PNL-2 and PNL-4 were more cytotoxic than other lectins.
Biological Screening of Some Sewage Microbes in Bangladesh
M.E. Haque,M.M. Pervin,M.Z. Rahman,K.M.K.B. Ferdaus
Asian Journal of Plant Sciences , 2005,
Abstract: The aim of present study was to investigate the bioactivity (antibacterial, antifungal and cytotoxicity etc.) of the ethylacetate extract isolated from Streptomyces sp. Aspergillus sp. and Bacillus sp. from sewage of different regions of Bangladesh. The ethylacetate extract of Streptomyces sp., Aspergillus sp. and Bacillus sp. shown modest antibacterial and antifungal activities at the concentration of 200 μg disc-1. The maximum antibacterial and antifungal activities were shown by the Streptomyces sp. The minimum inhibitory concentration of the microbial extracts was between 64 to 128 μg mL-1 against test organisms. Brine srimp lethality bioassay was carried out for cytotoxicity measurement of the extracts and the LC50 values were calculated after probit transformation of the resulting mortality data. All the ethyl acetate extract showed lower cytotoxicity properties (Streptomyces sp. 42.37 μg mL-1, Aspergillus sp.52.25 μg mL-1 and Bacillus sp. 47.51 μg mL-1) compared with the reference standard Bleomycin (0.41 μg mL-1) and Galic acid (4.53 μg mL-1).
Eosinophil-active chemokines: assessment of in vivo activity
Teixeira, M.M.;
Brazilian Journal of Medical and Biological Research , 1998, DOI: 10.1590/S0100-879X1998000100003
Abstract: the selective recruitment of eosinophils in tissue is a striking feature of allergic diseases. recently, a family of chemoattractant molecules, namely chemokines, has been described which potently activates eosinophil function in vitro. we have developed a murine model of eosinophil recruitment to compare the relative potency and efficacy of chemokines in vivo. of the chemokines tested, only eotaxin and mip-1a induced significant accumulation of eosinophils in vivo, but eotaxin was more effective than mip-1a. chemokines, especially eotaxin acting via the ccr-3 receptor, may have a fundamental role in determining selective eosinophil recruitment in vivo
Study of ion beam sputtering using a glow discharge ion source
Abdelrahman, M.M.;
Brazilian Journal of Physics , 2010, DOI: 10.1590/S0103-97332010000100005
Abstract: in this work, sputtering yield in a glow discharge ion source system has been determined using the operating parameters of the ion source. the sputtering yield is found to be varied between 0.4 to 1 atoms removed per incident ion for nitrogen while for argon between 0.2 to 1.3 atoms removed per incident ion. the feature of this ion source is high output ion beam current and small size. operation of the ion source is quite simple since a stable discharge can be obtained within a large range of main parameters such as, discharge voltage, discharge current and gas pressure. also, beam profile for argon ion beam produced from the glow discharge ion source at id = 2,3 ma (discharge current) using argon gas with different gas pressures has been investigated.
Torsional vibration of carbon nanotubes under initial compression stress
Selim, M.M.;
Brazilian Journal of Physics , 2010, DOI: 10.1590/S0103-97332010000300004
Abstract: this study examines torsional vibration of single-walled carbon nanotubes (swcnts) subjected to initial compression stresses. the nanotube structures are treated within the multilayer thin shell approximation with the elastic properties taken to be those of the graphene sheet. simplified flügge shell equations of motion are proposed as the governing equations of vibration for the carbon nanotubes. a new equation of motion and phase velocity of torsional waves propagating in carbon nanotubes (cnts) subjected to initial compression stresses have been derived. the study reveals that the initial stresses present in the tube has a notable effect on the propagation of torsional waves. the results has been discussed and shown graphically. this investigation is very significant for potential application and design of nanoelectronics and nanodevices.
Corrosion Behaviour of Zn-Al-Cu Alloy in HCl Solution and its Inhibition
Ahmed,M.M.;
Portugaliae Electrochimica Acta , 2006,
Abstract: the corrosion behaviour of zn - al - cu alloy was studied in pure hcl solutions and in the presence of different concentrations of inhibitors. the techniques of measurements were: weight loss, linear polarization, polarization impedance and corrosion penetration. it was found that the corrosion rate of this alloy is greatly higher than that of zn or al. the inhibitors used were: heterocyclic pyridine (p), 2-methyl pyridine (2 mp), 3-methyl pyridine (3 mp) and 4-methyl pyridine (4 mp). these inhibitors behave as mixed type and their inhibition efficiency increases according to the order: 2 mp < 3 mp < p <4 mp. the values of activation energy of corrosion were determined in pure acid and in the presence of inhibitors. it was found that the presence of these inhibitors increases the value of activation within the same order of their inhibitory effect. the adsorption of the investigated inhibitors on the surface of the alloy follows frumkin?s isotherm.
Page 1 /400833
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.