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Search Results: 1 - 10 of 76 matches for " Arpona Hira "
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Microwave Irradiated Cross Coupling of Carboxylic Acids and Crotyl Bromides: Efficient Application to Make Arachidonic Acid Esters  [PDF]
Mohammad Al-Masum, Arpona Hira
International Journal of Organic Chemistry (IJOC) , 2018, DOI: 10.4236/ijoc.2018.84026
Abstract: A microwave irradiated palladium-catalyzed reaction of carboxylic acids and crotyl type bromides creates series of esters in good to high yields. This facile ester synthesis then is applied to make esters from arachidonic acid, salicylic acid, folic acid, and aspirin efficiently.
Evaluation of Diuretic and Neuropharmacological Properties of the Methanolic Extract of Avicennia officinalis L. leaves from Bangladesh
Md. Hemayet Hossain,Md. Sariful Islam Howlader,Shubhra Kanti Dey,Arpona Hira
International Journal of Pharmaceutical and Phytopharmacological Research , 2012,
Abstract: The crude methanolic extract of the leaves of Avicennia officinalis L. (Family: Avicenniaceae) was evaluated for its diuretic and neuropharmacological activities. Phytochemical analysis of the ethanolic extract of the leaves of A. officinalis indicates the presence of alkaloid, steroid, flavonoid, reducing sugars and gums. The extract of A. officinalis leaves also potentiated the pentobarbital induced sleeping time in mice, and decreased the open field score in open field test, decreased the number of hole crossed from one chamber in the hole cross test and decreased the head dip responses in hole board test. Diuretic activity was proved by the electrolyte loss ratio (Na+/K+ excretion ratio was 1.52 and 1.33 at the doses of 200 and 400 mg/kg respectively) as that of the standard diuretic furosemide (1.35). The obtained results provide a support for the use of this plant in traditional medicine and its further investigation.
Antinociceptive and antidiarrhoeal properties of the ethanolic extract of Brownlowia tersa leaves
Sariful Islam Howlader,Md. Jamil Ahmed Shilpi,Shubhra Kanti Dey,Arpona Hira
International Journal of Pharmaceutical and Phytopharmacological Research , 2012,
Abstract: The present study was designed to investigate the antinociceptive and antidiarrhoeal activities of ethanolic extract of the leaves of Brownlowia tersa (L.) Kosterm (Family: Tiliaceae). The ethanol extract at graded doses (250 and 500 mg/kg body weight) was investigated for antinociceptive and antidiarrhoeal activity. At the dose of 250 and 500 mg/kg body weight, the extract showed a significant antinociceptive activity in acetic acid induced writhing model in mice showing 45.61% and 63.85% writhing inhibition (P<0.001) respectively while the standard drug diclofenac was found to be 76.69% inhibition at a dose of 25 mg/kg body weight. The antidiarrhoeal activity of the extract was investigated in term of reduction in the rate of defecation and consistency of faeces in castor oil induced diarrhoea. At the dose of 500 mg/kg body weight, the extract showed moderately significant antidiarrhoeal activity showing 50.56% reduction in diarrhoea (P<0.01) comparable to that of standard drug loperamide (68.53%). Phytochemical screening of the leaf extract indicated the presence of carbohydrate (reducing sugars), glycosides, saponins, tannins and flavonoids. Therefore, the obtained results tend to suggest the antinociceptive and antidiarrhoeal activities of the crude ethanolic extract of the leaves of Brownlowia tersa, thus provide the scientific basis for the traditional uses of this plant as a pain killer and modality for diarrhea.
Evaluation of Antidiarrhoeal Potential of the Ethanolic Extract of Three Bangladeshi Medicinal Plants
Hemayet Hossain,Shubhra Kanti Dey,Arpona Hira,Md. Sariful Islam Howlader
International Journal of Pharmaceutical and Phytopharmacological Research , 2012,
Abstract: The present study was designed to investigate the antidiarrhoeal activity as well as phytochemical screening of ethanolic extract of three Bangladeshi medicinal plants namely Diospyros blancoi A. DC (leaf), Acacia nilotica Linn. (bark) and Hibiscus sabdariffa Linn. (seed and calyxes). The ethanol extracts at graded doses (250 and 500 mg/kg body weight) was investigated for antidiarrhoeal activity in acetic acid induced writhing model in mice. Diospyros blancoi leaf extract significantly (p<0.001)inhibited the mean number of defecation which were 33.19% and 45.28% at the doses of 250 and 500mg/kg respectively. The latent period was increased and number of stools for the extract treated group was significantly (p<0.001) decreased as compared to control group. The result was found comparable to the effect of standard antidiarrhoeal drug loperamide (62.26% at the dose of 3mg/kg). The bark extract of Acacia nilotica at the dose of 500mg/kg body weight produced 32.64% inhibition of defecation. The percent inhibition of the ethanol extract of Hibiscuss sabdariffa calyxes and seed extracts were found to be (16.98% and 11.32%) at the dose of 250mg/kg and (24.53% and 20.75%) at the doses of 500mg/kg body weight respectively. Phytochemical analysis of the extract of these three Bangladeshi medicinal plants indicated the presence of reducing sugar, gum, tannin and alkaloid types of compounds. Therefore, the obtained results tend to suggest the antidiarrhoeal activities of the crude ethanolic extract of the leaves of Diospyros blancoi A. DC and that of bark of the Acacia nilotica Linn. thus provide the scientific basis for the traditional uses of these plants as modality for diarrhea.
Antidiarrhoeal Activity and Total Tannin Content of Ethanolic Leaf Extract of Croton Sparsiflorus
Hemayet Hossain,Md. Sariful Islam Howlader,Shubhra Kanti Dey,Arpona Hira
Journal of Pharmaceutical and Bioanalytical Science , 2012,
Abstract: The present study was designed to investigate the antidiarrhoeal activity and determination of total tannin content of theethanolic leaf extract of Croton sparsiflorus Lour. The antidiarrhoeal activity was evaluated in castor oil induced diarrhoeamodel in mice and total tannin content was determining by using the Folin-ciocalteu phenol reagent. The ethanolic leaf extractof Croton sparsiflorus (C. sparsiflorus) was shown significant effect on castor oil induced diarrheal method in mice. Theresult showed that extract inhibited the mean number of defecation which were 24.53% and 41.51% (P<0.01 & P<0.001) atthe doses of 250 mg/kg and 500 mg/kg respectively. The latent period for the extract treated group was increased as comparedto control group. The total tannin content was quite significant and high in ethanolic extract (257.31 mg/g of tannic acidequivalent). Phytochemical screening of the leaf extract indicated the presence of carbohydrate (reducing sugars), alkaloids,steroids, flavonoids, saponin & tannins. Acute toxicity test showed that the plant might be safe for pharmacological uses.Therefore, the obtained results of the present study confirm antidiarrhoeal activity of the leaves of C. sparsiflorus, thusprovide the scientific basis for the traditional uses of this plant as the modality for diarrhea.
Did ISI fail and is neoliberalism the answer for Latin America? Re-assessing common wisdom regarding economic policies in the region
Hira, Anil;
Revista de Economia Política , 2007, DOI: 10.1590/S0101-31572007000300002
Abstract: the second phase of import substituting industrialization, commonly known as isi2, involved the move in latin america to "heavy" industrialization, from around 1950-80. this period of economic history has been reviled on both the left and the right as being one of either heightened dependency or one demonstrating the clear failure of state intervention in the economy. in this research note, a basic statistical analysis is used to back up other descriptive claims that the isi2 period was rather one of mixed success, with macroeconomic volatility accompanying great progress in gdp and manufacturing growth. in a sense, the isi2 period succeeded in industrializing the large economies of the period, and contrasts favorably with the record of the succeeding paradigm of neoliberalism. this research note seeks to raise questions about the way we look at the historical period of isi2, and suggests that a more open-minded perspective could lead to a more effective and sustainable political economy paradigm for the region in the future.
Training of pulmonary medicine in India
Hira H
Lung India , 2006,
Abstract:
Phytochemical Study of Glycosmis Mauritiana  [PDF]
Javed Intekhab, Mohammad Aslam, Hira Khalid
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.25078
Abstract: Three quinolinone alkaloids, two acridone alkaloids and a flavones glycoside were isolated from the aerial parts of Glycosmis mauritiana. These compounds were characterized as 7, 8-Dimethoxy-2,2,6-trimethyl-pyrano quinolin-5-one, 4-Methoxy 1-methyl quinolin-2-one, 6-Hydroxy N-methyl 2,3-furo-quinolin-4-one, 1-Hydroxy-10-methyl acridone, 1- Hydroxy-2, 3-dimethoxy-10-methylacridin-9-one and Luteolin-4'-O-[α-L-rhamnopyranosyl-(1→2)-{α-L-rhamnopyra- nosyl-(1→6)}-β-D-glycopyranoside]. The isolated compounds were characterized by UV, IR and N. M. R (1H, 13C) studies.
An Overview of Mobile Malware and Solutions  [PDF]
Fan Wu, Hira Narang, Dwayne Clarke
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.212002
Abstract:

Mobile Security has been a rapidly growing field in the security area. With the increases of mobile devices and mobile applications, the need for mobile security has increased dramatically over the past several years. Many research and development projects on mobile security are ongoing in government, industry and academia. In this paper, we present an analysis of current mobile security problems and propose the possible solutions to malware threats. Our experiments show antimalware can protect mobile device from different types of mobile malware threats effectively.

An Efficient Acceleration of Solving Heat and Mass Transfer Equations with the Second Kind Boundary Conditions in Capillary Porous Composite Cylinder Using Programmable Graphics Hardware  [PDF]
Hira Narang, Fan Wu, Abdul Rafae Mohammed
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.69003
Abstract: With the recent developments in computing technology, increased efforts have gone into simulation of various scientific methods and phenomenon in engineering fields. One such case is the simulation of heat and mass transfer in capillary porous media, which is becoming more and more important in analysing various scenarios in engineering applications. Analysing such heat and mass transfer phenomenon in a given environment requires us to simulate it. This entails simulation of coupled heat mass transfer equations. However, this process of numerical solution of heat and mass transfer equations is very much time consuming. Therefore, this paper aims at utilizing one of the acceleration techniques developed in the graphics community that exploits a graphics processing unit (GPU) which is applied to the numerical solutions of heat and mass transfer equations. The nVidia Compute Unified Device Architecture (CUDA) programming model caters a good method of applying parallel computing to program the graphical processing unit. This paper shows a good improvement in the performance while solving the heat and mass transfer equations for capillary porous composite cylinder with the second kind of boundary conditions numerically running on GPU. This heat and mass transfer simulation is implemented using CUDA platform on nVidia Quadro FX 4800 graphics card. Our experimental results depict the drastic performance improvement when GPU is used to perform heat and mass transfer simulation. GPU can significantly accelerate the performance with a maximum observed speedup of more than 7-fold times. Therefore, the GPU is a good approach to accelerate the heat and mass transfer simulation.
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