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Search Results: 1 - 10 of 542646 matches for " M. R. M. Khoshkholgh Pahlaviani "
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Antimutagenic activity of olive leaf aqueous extract by Ames test
Kh. Issazadeh,M. A. Aliabadi,R. Kazemi Darsanaki,M. R. M. Khoshkholgh Pahlaviani
Advanced Studies in Biology , 2012,
Abstract:
Chemical composition and antimicrobial activity of various extracts of O. gratissimum L. from Guilan, Iran
M. R. M. Khoshkholgh Pahlaviani,Kh. Issazadeh,A. Massiha,M. Giahi
Advanced Studies in Biology , 2013,
Abstract: The in vitro antimicrobial activities of crude ethanol, methanol and water extractsof the stem bark of O. gratissimumwere investigated. The extracts exhibited antimicrobial activities with zones of inhibition ranging from 10 to 20, 7 to 14 and2 to 7mm for methanol, ethanol and water extracts respectively. The minimuminhibitory concentration (MIC) of the methanol extract was between 0.5 and 10mgml-1 while that of ethanol extract ranged from 0.5 to 20 mgml-1,while MIC andMBC of streptomycin (Control strain) ranged between 0.065 and 0.5 mgml-1 forall tested bacteria. The minimum bactericidal concentration (MBC) for methanolextract ranged between 2.0 and 12.50 mgml-1, while that of ethanol ranged from2.0 to 20 mgml-1. Again all the extracts exhibited appreciable activity against allthe fungal species investigated. The zones of inhibition exhibited by the extractsagainst the test fungal species ranged between 2 and 9 for water, ethanol andmethanol extracts respectively. Phytochemical screening revealed the presence ofsaponin, steroids, tannins, glycosides, alkaloids and flavonoids in the extracts. Theability of the crude stem extracts of O. gratissimum to inhibit the growth ofbacteria is an indication of its broad spectrum antimicrobial potential which maybe employed in the management of microbial infections.
A New Approach to Nonsinusoidal Steady-State Power System Analysis
A. Ketabi,M. Khoshkholgh,R. Feuillet
Mathematical Problems in Engineering , 2009, DOI: 10.1155/2009/584637
Abstract: A new analysis method using wavelet domain for steady-state operating condition of power system is developed and introduced. Based on wavelet-Galerkin theory, the system components such as resistor, inductor, capacitor, transmission lines, and switching devices are modeled in discrete wavelet domain for the purpose of steady-state analysis. To solve system equations, they are transferred to wavelet domain by forming algebraic matrix-vector relations using the wavelet transform coefficients and the equivalent circuit is thus built for system simulation. After describing the new algorithm, two-case studies are presented and compared with the simulations in the time domain to verify the accuracy and computational performance.
Antibacterial Activity of Essential Oils and Plant Extracts of Artemisia (Artemisia annua L.) In Vitro
Alireza Massiha,Mohammadreza Majid Khoshkholgh-Pahlaviani,Khosro Issazadeh,Sirus Bidarigh
Zahedan Journal of Research in Medical Sciences , 2013,
Abstract: Background: Many of the plants used to treat certain diseases, because they have showed antimicrobial activity. In this case, many studies have conducted on antimicrobial and antioxidant activity of Artemisia annua. Materials and Methods: The purpose of this study is to determine the antibacterial effects of aqueous, chloroform, methanol and ethanol extracts of A. annua against eight bacterial species. Antimicrobial activity, minimum inhibitory concentration and minimum bactericidal activity of the essential oil and extract was performed by agar disc diffusion and microdilution broth methods.Results: The obtained results showed antibacterial activity of the organic and chloroformic extracts of Artemisia annua against the tested microorganisms. Presence of tannins, saponins, alkaloids, amino acids, phenolic compounds, quinines and terpenoids were identified in the composition of the obtained extract using mass gas-chromatograph. The best result for the minimum inhibitory Concentration and minimum bactericidal concentration was reported for the 32 mg/ml of chloroformic extract.Conclusion: The results indicate the fact that the extracts and essential oils of the plants can be useful as medicinal or preservatives composition.
Minima Domain Intervals and the S-Convexity, as well as the Convexity, Phenomenon  [PDF]
I. M. R. Pinheiro
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.26069
Abstract: In this paper, we propose a refinement in the analytical definition of the s2-convex classes of functions aiming to progress further in the direction of including s2-convexity properly in the body of Real Analysis.
Temple as the Site of Struggle: Social Reform, Religious Symbols and the Politics of Nationalism in Kerala  [PDF]
M. R. Manmathan
Advances in Historical Studies (AHS) , 2013, DOI: 10.4236/ahs.2013.22010
Abstract: The temple entry movement of the 1920s and ’30s in Kerala, South India, has become a landmark in the history of social reform and nationalist movements for its uniqueness and sweeping success. Popular history has presented the episode as an integral part of the Nationalist Movement and the Gandhian Constructive Programme mainly because the temple-entry issue was endorsed by the Kerala State Congress Committee and the agitation was concluded under its auspices. But this popular and idealist impression of the movement has been challenged from various quarters. It is pointed out that there have been very little attempts at linking the event with the advancing civic rights movement led by the lower caste people for freedom of worship and social equality which was gaining a radical turn by the 20s and 30s; the pressure exerted by the untouchables to achieve civic freedom even at the cost of renouncing Hinduism had created an alarming situation which no caste-Hindu could ignore. Even more surprising is the absence of academic attempts to link the agitation with the Malabar Rebellion of 1921; in fact the Rebellion had challenged the very survival of the Congress organization in Kerala; this factor forced them to retreat from the earlier secular plane to a religious idiom of politics for which the question of temple-entry served their purpose. The Temple entry movement, therefore, has to be studied in the light of the antipathy shown by the Congress towards popular and radical agitations and in the context of its growing tendency to incline towards Hindu symbols in politics as a means to escape addressing vital and burning social issues.
First Note on the Definition of s1-Convexity  [PDF]
I. M. R. Pinheiro
Advances in Pure Mathematics (APM) , 2014, DOI: 10.4236/apm.2014.412076
Abstract:

In this note, we analyze a few major claims about . As a consequence, we rewrite a major theorem, nullify its proof and one remark of importance, and offer a valid proof for it. The most important gift of this paper is probably the reasoning involved in all: We observe that a constant, namely t, has been changed into a variable, and we then tell why such a move could not have been made, we observe the discrepancy between the claimed domain and the actual domain of a supposed function that is created and we then explain why such a function could not, or should not, have been created, along with others.

Second Note on the Definition of S1-Convexity  [PDF]
I. M. R. Pinheiro
Advances in Pure Mathematics (APM) , 2015, DOI: 10.4236/apm.2015.53015
Abstract: In this note, we discuss the definition of the S1-convexity Phenomenon. We first make use of some results we have attained for??\"\" in the past, such as those contained in [1], to refine the definition of the phenomenon. We then observe that easy counter-examples to the claim \"\" extends K0 are found. Finally, we make use of one theorem from [2] and a new theorem that appears to be a supplement to that one to infer that?\"\" does not properly extend K0 in both its original and its revised version.
Importance of Well Spacing and Orientation for Multi-Lateral Pads on Production: Learnings from Production Analysis and Numerical Modelling of the Mannville Coal Measures, South Central Alberta  [PDF]
Amanda M. M. Bustin, R. Marc Bustin
Engineering (ENG) , 2018, DOI: 10.4236/eng.2018.107027
Abstract: The modelling results from numerical simulations of the Early Cretaceous, Mannville coal measures with anisotropic permeability provide insights into development strategies not readily visualized or otherwise intuitive. The complex relationships between water and gas production, the contribution from multiple coal seams as well as from organic rich shales, and the impact of well interference combined with anisotropic fracture permeability are investigated through a series of numerical simulations of four well-pads (on the corners of a square mile of land with decreasing well spacing from 1, 3, to 4 laterals per pad). After 25 years of production, the two pads with optimally-oriented laterals with respect to the fracture permeability anisotropy produce 61% of the recovered gas for the 1 lateral/pad model, 52% for the 3 laterals/pad model, and 50% for the 4 laterals/pad model. Downspacing has a greater impact on increasing the gas production from pads with the poorly-oriented main laterals than from the pads with the optimally-oriented main laterals. The cumulative gas production at the end of the 25 year history is 4.2% higher for an optimally-oriented pad (pad1) and 1.1× higher for a poorly-oriented pad (pad3) for a model with 4 laterals/pad than 3 laterals/pad and an optimally-oriented pad is 1.1% higher for an optimally-oriented pad and 1.5× higher for a poorly-oriented pad for a model with 3 laterals/pad than 1 lateral/pad. Although downspacing from 3 to 4 laterals/pad has a greater impact on increasing the cumulative gas production from optimally-oriented pads than downspacing from 1 to 3 laterals/pad, the lower impact on poorly-oriented pads results in a lower total increase the cumulative gas production from the four pads. At the end of the 25-year production history, 9.0% more gas is recovered for the 4 lateral/pad model than the 3 lateral/pad model, which predicts 1.2× more gas than the 1 lateral/pad model. The recovered shale gas exceeds the recovered coal gas after ~7 years of production. The higher contribution of produced coal gas predicted due to downspacing results from a higher contribution of recovered gas from the main coal seam, while the contribution from the minor coal seams is lower. Downspacing has a minimal impact on the cumulative water production; after 25 years of production a difference of 1.0% is predicted between models with 4 and 3 laterals/pad and 1.7% between models with 1 and 3 laterals/pad. While downspacing increases the cumulative water production for the poorly-oriented pads (1.1× for 3 to 4 laterals/pad and 1.3× for
Investigation of Natural Convection Heat Transfer Coefficient on Extended Vertical Base Plates  [PDF]
M. Fahiminia, M. M. Naserian, H. R. Goshayeshi, D. Majidian
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.32022
Abstract: In this research, Computational analysis of the laminar natural convection on vertical surfaces has been in-vestigated. Natural convection is observed when density gradients are present in a fluid acted upon by a gravitational field. Our example of this phenomenon is the heated vertical plate exposed to air, which, far from the plate, is motionless. The CFD simulations are carried out using fluent software. Governing equa-tions are solved using a finite volume approach. Coupling between the velocity and pressure is made with SIMPLE algorithm. The resultant system of discretized linear algebraic equations is solved with an alternat-ing direction implicit scheme. Then a configuration of rectangular fins is put in different ways on the surface and natural convection heat transfer coefficient on these no slope surfaces is studied and finally optimization is done.
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