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Search Results: 1 - 10 of 2325 matches for " Kanti Pandey "
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A Note on Crank-Nicolson Scheme for Burgers’ Equation  [PDF]
Kanti Pandey, Lajja Verma
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.27118
Abstract: In this work we generate the numerical solutions of the Burgers’ equation by applying the Crank-Nicolson method directly to the Burgers’ equation, i.e., we do not use Hopf-Cole transformation to reduce Burgers’ equation into the linear heat equation. Absolute error of the present method is compared to the absolute error of the two existing methods for two test problems. The method is also analyzed for a third test problem, nu-merical solutions as well as exact solutions for different values of viscosity are calculated and we find that the numerical solutions are very close to exact solution.
Investigation of Shock Waves in Non-Ideal Gas under the Action of Magnetic Field  [PDF]
Kanti Pandey, Praveen Prakash Pathak
Advances in Pure Mathematics (APM) , 2017, DOI: 10.4236/apm.2017.710035
Abstract: In present paper, certain aspect of shock wave in non-ideal gas, when magnetic field is orthogonal to the trajectories of the gas particles and electrical conductivity is taken to be infinite, is investigated. Considering one-dimensional unsteady non-planer motion, basic equations, its general solution and formation of shock-wave, conservation laws and jumps conditions, variation of area of non-uniform cross section and analytical solution of strong non planer shock is obtained.
Plant Polyphenols as Dietary Antioxidants in Human Health and Disease
Kanti Bhooshan Pandey,Syed Ibrahim Rizvi
Oxidative Medicine and Cellular Longevity , 2009, DOI: 10.4161/oxim.2.5.9498
Abstract: Polyphenols are secondary metabolites of plants and are generally involved in defense against ultraviolet radiation or aggression by pathogens. In the last decade, there has been much interest in the potential health benefits of dietary plant polyphenols as antioxidant. Epidemiological studies and associated meta-analyses strongly suggest that long term consumption of diets rich in plant polyphenols offer protection against development of cancers, cardiovascular diseases, diabetes, osteoporosis and neurodegenerative diseases. Here we present knowledge about the biological effects of plant polyphenols in the context of relevance to human health.
Markers of Oxidative Stress in Erythrocytes and Plasma During Aging in Humans
Kanti Bhooshan Pandey,Syed Ibrahim Rizvi
Oxidative Medicine and Cellular Longevity , 2010, DOI: 10.4161/oxim.3.1.10476
Abstract: Aging is an inevitable universal biological process, which can be characterized by a general decline in physiological function with the accumulation of diverse adverse changes and increased probability of death. Among several theories, oxidative stress/free radical theory offers the best mechanistic elucidation of the aging process and other age-related phenomenon. In the present paper, we discuss the aging process and have focused on the importance of some reliable markers of oxidative stress which may be used as biomarkers of the aging process.
Resveratrol may protect plasma proteins from oxidation under conditions of oxidative stress in vitro
Pandey, Kanti Bhooshan;Rizvi, Syed Ibrahim;
Journal of the Brazilian Chemical Society , 2010, DOI: 10.1590/S0103-50532010000500020
Abstract: proteins are vulnerable to oxidative stress; attack by reactive oxygen species causes oxidation and formation of carbonyl moieties, advanced oxidation protein products (aopps) and other undesired oxidation products. resveratrol, a polyphenolic phytoalexin found abundantly in grapes and red-wine, is one of the most extensively studied natural products, with wide ranging biological activities including cardio-protective, neuro-protective, anti-aging, and anti-cancer. most of the effects of these stilbenes are attributed to their antioxidant property. in the present study we have evaluated the role of resveratrol in the protection of plasma protein oxidation after induction of in vitro oxidative stress. inducing oxidative stress by incubating with 10-5 mol l-1 tert-butylhydroperoxide caused a significant elevation in plasma protein carbonyls (pco) and aopps, and decrease in -sh groups. presence of resveratrol protected proteins from oxidation, an effect which was concentration dependent. on the basis of our experiments and effects shown by resveratrol we substantiate existing evidence for the strong antioxidant property of resveratrol.
Markers of Oxidative Stress in Erythrocytes and Plasma During Aging in Humans
Kanti Bhooshan Pandey,Syed Ibrahim Rizvi
Oxidative Medicine and Cellular Longevity , 2010, DOI: 10.4161/oxim.3.1.10476
Abstract: Aging is an inevitable universal biological process, which can be characterized by a general decline in physiological function with the accumulation of diverse adverse changes and increased probability of death. Among several theories, oxidative stress/free radical theory offers the best mechanistic elucidation of the aging process and other age-related phenomenon. In the present paper, we discuss the aging process and have focused on the importance of some reliable markers of oxidative stress which may be used as biomarkers of the aging process.
Markers of Oxidative Stress during Diabetes Mellitus
Brahm Kumar Tiwari,Kanti Bhooshan Pandey,A. B. Abidi,Syed Ibrahim Rizvi
Journal of Biomarkers , 2013, DOI: 10.1155/2013/378790
Abstract: The prevalence of diabetes mellitus is rising all over the world. Uncontrolled state of hyperglycemia due to defects in insulin secretion/action leads to a variety of complications including peripheral vascular diseases, nephropathy, neuropathy, retinopathy, morbidity, and/or mortality. Large body of evidence suggests major role of reactive oxygen species/oxidative stress in development and progression of diabetic complications. In the present paper, we have discussed the recent researches on the biomarkers of oxidative stress during type 2 diabetes mellitus. 1. Introduction Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion and insulin action or both. The chronic hyperglycemia is associated with long-term damage, dysfunction, and failure of normal functioning of various organs, especially the eyes, kidneys, nerves, heart, and blood vessels [1, 2]. Diabetes-specific microvascular disease is a leading cause of blindness, renal failure, and nerve damage [3]. The prevalence of diabetes is rising all over the world due to population growth, aging, urbanisation, and the increase of obesity due to physical inactivity. Unlike the West, where the older are most affected, diabetes in Asian countries is comparatively high in young to middle-aged people. All these complications have long-lasting adverse effects on a nation’s health and economy, especially for developing countries. As per estimate of the International Diabetes Federation (IDF), the total number of people in India with diabetes which was around 50.8 million in 2010 would be 87.0 million by 2030 [4]. Hyperglycaemia generates reactive oxygen species (ROS), which in turn cause damage to the cells in many ways. Damage to the cells ultimately results in secondary complications in diabetes mellitus [5, 6]. In the present paper, we have discussed the markers of oxidative stress in diabetes mellitus. The involvement of ROS in the aetiology and the development of late complications have also been addressed. The review further examines the main toxic effects of ROS on lipid, protein, glutathione metabolism, catalase, superoxide dismutases, and antioxidant capacity of plasma. 2. Diabetic Complications Diabetes is a major source of morbidity, mortality, and economic cost to the society. People with diabetes showed the risk of the development of acute metabolic complications such as diabetic ketoacidosis, hyperglycaemic hyperosmolar nonketotic coma, and hypoglycaemia [7, 8]. In addition to this, diabetics are also at risk of experiencing
A Different Approach for Big Bang Singularity  [PDF]
Malay Kanti Sikdar
Natural Science (NS) , 2018, DOI: 10.4236/ns.2018.104016
Abstract: With the discovery of Hubble Red Shift in the cosmological Universe, the question of Big Bang explosion has become inevitable and to explain this point of singularity thereon. Dissolution and manifestation of the universe happen to occur periodically. In this paper,analysis has been undertaken on the basis of scientific development on well accepted cosmological model, different scientific concepts and on one Vedic/Tantric scriptural remark. According to Vedic/Tantric scriptural remark, at the time of dissolution of the universe it remains in the form of gram. Different scientific tools like Electron Microscopy, X-rays powder diffraction method. Raman & UV spectroscopy have been applied in analyzing the two parts of gram and finally to find out what do they correspond to cosmological analysis of Big Bang singularity. Main mechanisms in action in dissolution and manifestation have also been pointed out.
Hydrochemical Characteristics of Groundwater for Domestic and Irrigation Purposes in Dwarakeswar Watershed Area, India  [PDF]
Sisir Kanti Nag, Anindita Lahiri
American Journal of Climate Change (AJCC) , 2012, DOI: 10.4236/ajcc.2012.14019
Abstract:

The Hydrochemical study was carried out in Dwarakeswar watershed area, Bankura and Purulia districts, West Bengal, India, with an objective of understanding the suitability of local groundwater quality for domestic and irrigation purposes. Groundwater samples have been collected from different villages within Dwarakeswar watershed area. The samples have been analysed to determine physical parameters like pH, EC, TDS and Hardness, the chemical parameters like Na, K, Ca, Fe, HCO3, SO4 and Cl. From the analysed data, some parameters like Sodium Absorption Ratio (SAR), Soluble Sodium Percentage (SSP), Residual Sodium Carbonate (RSC), Total Hardness (TH), Magnesium Absorption Ration (MAR) and Kelly’s Ratio (KR) have also been determined. The distribution pattern of TDS and chlorides, which are the general indicators of groundwater quality reveals that on an average the ground water is fresh and potable except the ground water in and around Teghari, Gara and Satyatan Primary school where the groundwater is not potable and may affect the health of local population because concentration of TDS exceeds the desirable limits of 500 mg/L. The aerial distribution of Total Dissolved Solids (TDS) reveals that highest concentration is recorded at Gara and Teghri and the lowest concentrations is noted in Suburdih and Kalabani. SAR values were ranged between 0.09 - 0.54 meq/L in pre monsoon and 0.01 - 0.24 meq/L in post-monsoon. It is evident from the whole sample set that the SAR value is excellent in all the samples. Hence, our findings strongly suggest that all the abstracted groundwater samples from the study area were suitable for irrigation. Results of analyses for physical and chemical parameters of groundwater in this area was found to be within the desirable Bureau of Indian Standards and World Health Organisation limits for drinking water.

Adsorption Characteristics of Zinc (Zn2+) from Aqueous Solution by Natural Bentonite and Kaolin Clay Minerals: A Comparative Study  [PDF]
Tushar Kanti Sen, Chi Khoo
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2013, DOI: 10.4236/cweee.2013.23B001
Abstract:

Clay minerals are one of the potential good adsorbent alternatives to activated carbon because of their large surface area and high cation exchange capacity. In this work the adsorptive properties of natural bentonite and kaolin clay minerals in the removal of zinc (Zn2+) from aqueous solution have been studied by laboratory batch adsorption kinetic and equi- librium experiments. The result shows that the amount of adsorption of zinc metal ion increases with initial metal ion concentration, contact time, but decreases with the amount of adsorbent and temperature of the system for both the ad- sorbents. Kinetic experiments clearly indicate that adsorption of zinc metal ion (Zn2+) on bentonite and kaolin is a two-step process: a very rapid adsorption of zinc metal ion to the external surface is followed by possible slow decreas- ing intraparticle diffusion in the interior of the adsorbent. This has also been confirmed by an intraparticle diffusion model. The equilibrium adsorption results are fitted better with the Langmuir isotherm compared to the Freundlich model. The value of separation factor, RL from Langmuir equation give an indication of favourable adsorption. Finally from thermodynamic studies, it has been found that the adsorption process is exothermic due to negative ?H0 accompa- nied by decrease in entropy change and Gibbs free energy change (?G0). Overall bentonite is a better adsorbent than kaolin in the the removal of Zn2+ from its aqueous solution.

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