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Search Results: 1 - 10 of 472157 matches for " Desai N.S. "
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Ayur-informatics: Establishing an in-silico-ayurvedic medication for Alzheimer’s disease
Mohini Gore,Preenon Bagchi,Desai N.S.,Ajit Kar
International Journal of Bioinformatics Research , 2010,
Abstract: Alzheimer’s disease is an incurable, degenerative, and terminal disease. It is associated withmutations in Amyloid Precursor Protein (APP), Presenilin 1 (PS1), Presenilin 2 (PS2), or Apolipoprotein E(APOE). 3D structures of these 4 proteins were generated using Homology Modeling. Active compounds ofmedicinal herbs- Canscora decussate, Nardostachys jatamansi and Mucuna pruriens were selected asthese three herbs have properties of memory enhancement. Chemical structures of the active component ofthese herbs were drawn using chemsketch, combined & converted to *.pdb. The four proteins weresuccessfully docked with Canscora decussate- Nardostachys jatamansi –Mucuna pruriens’s activecomponent combination.
HSP: evolved and conserved proteins, structure and sequence studies
Desai N.S.,Agarwal A.A.,Uplap S.S.
International Journal of Bioinformatics Research , 2010,
Abstract: Heat shock proteins (HSPs) are the proteins which are present normally in the cell but theirexpression level increases under stress condition and are mainly divided into five groups, low molecularweight HSP (LMW HSP), HSP 60, HSP 70, HSP 90 and high molecular weight HSP (HMW HSP). All theseclasses of HSPs are highly conserved and ubiquitous in nature and hence serve as a good model forphylogenetic analysis. For the first time in this study,the sequence and structural analysis has been carriedout to predict evolution of HSPs. The results obtained clearly show higher degree of sequence and structuralconservation. HSP 60 and HSP 70 are highly conserved in terms of both sequence and structure alignmentin comparison to HSP 90. The minimum amino acid identity that has been observed between all thehomologous sequences is 32.46%, 38%, 23.60% for HSP 60, HSP 70 and HSP 90 respectively, indicatingHSP 70 as the most conserved protein family followed by HSP 60 and HSP 90 family. The structuralanalysis of these proteins showed dominance of beta sheets in HSP70 and helices in HSP 90. The detailedanalysis of all the HSP homologues revealed high conservation of glycine residues and ATP binding pockets.Thus this study has revealed that HSPs are highly structurally and functionally conserved proteins andwarrants further detailed analysis at organism level.
Studies of The Mechanism of Polyvinyl Alcohol Adsorption on The Calcite/Water Interface in The Presence of Sodium Oleate  [PDF]
N.S. LABIDI, A. DJEBAILI
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2008, DOI: 10.4236/jmmce.2008.72012
Abstract: The adsorption behavior of polyvinyl alcohol (PVA) on the CaCO3/solution interface under the influence of sodium oleate (SOl) interaction was investigated by the adsorbed amount, FTIR spectra, X-Ray diffraction and zeta potential. Effects of solid to liquid ratio and temperature was also examined. Observed increase of the PVA adsorption in presence of the sodium oleate resulted from a polymer-surfactant complex formation. The surfactant also influences on the structure of the adsorbed polymer layers. This effect was proved by adsorption measurements that allow calculation of the thickness of the adsorbed layer of the polymer on the surface of CaCO3 in the presence and the absence of sodium oleate. The interaction between oleate anions and PVA is a physical type (via hydrogen bonding).
VEGETATION AND SOIL DIFFERENTIATION WITHIN THE LIMITS OF ECOTOPE ON THE MIDDLE URAL REGION
Ivanova N.S;
EUROPEAN JOURNAL OF NATURAL HISTORY (EJNH) , 2011,
Abstract: Transformation of vegetation and soil, which takes place in dark-coniferous forests under the action of clear fellings, fires and haymaking in dominating forest conditions of the mountains of the Middle Urals (at the bottom of draining gentle slopes), was studied. It was found that strong anthropogenic effects lead to appearance of a wide spectrum of vegetation communities within a single forest ecotope (one type of radical forests). For a long time these vegetation communities differ by the structure of all vegetation layers, conditions of soil formation, and, consequently, by the direction and intensity of restoration processes.
Effect of Planting Methods on Growth of Cassava
N.S. Oguzor
Research Journal of Biological Sciences , 2012,
Abstract: The experiment investigated the effect of planting methods on growth of cassava in Omoku climatic zone, Nigeria. Randomized complete block design was used in the experiment. The treatments were horizontal method (control), slanting method and vertical methods of planting. Comparison of treatments was done with use of percentages, mean and analysis of variance on parameters such as emergence (appearance of shoot), germinated nodes, height at 20, 40 and 60 days after planting. Analysis of the result showed that vertical method of planting cassava gave the best sprouting percentage of 88.8% while there was no significant difference on the number of germinated nodes. Based on the findings of the experiment, it is recommended that vertical method of planting cassava or slanting method should be employed because they sprouted more rapidly than horizontal method. During propagation the nodes should be placed upwards for proper and luxuriant growth of the plant.
Effect of Palm Bunch Ash on Growth of Groundnut (Arachis hypogaea)
N.S. Oguzor
Research Journal of Agronomy , 2012,
Abstract: The study investigates the effect of palm bunch ash on growth of groundnut (Arachis hypogaea). The emergence of the plant was observed to be poorly enhanced by the application of palm bunch ash. The application of 500 g and the control gave the highest emergence percentage of 25.33 and 24.7. The application of palm bunch ash affected emergence and yield significantly. It is therefore recommended that for economic purpose palm bunch ash should be applied to groundnut for optimal yield.
Agronomic Performance of Cucumber (Cucumis sativa) in a Humid Tropical Rainforest Zone of Nigeria
N.S. Oguzor
Online Journal of Earth Sciences , 2012,
Abstract: The study investigated the agronomic performance of cucumber (Cucumis sativa) in humid rainforest zone of Nigeria. The experimental design was randomized complete block design. Analysis of Variance (ANOVA) was used to analyze data collected for the study. Results revealed that the emergence of cucumber crop was relatively enhanced by the fertile status of the soil and the performance was a function of early appearance of flower which also determined the average yield. Based on the findings of the study, it is suggested that seed viability should be taken into account when cultivating cucumber. Combined application of organic and inorganic fertilizers will enhance yield.
Yield Characteristics and Growth of Cassava-Soybean Intercrop
N.S. Oguzor
Agricultural Journal , 2013,
Abstract: An experiment was conducted to investigate yield characteristics and growth of cassava-soybean intercrop. The experimental design used was randomized complete block comprising of 3 blocks and 3 replicates of sole soybean, sole cassava and cassava-soybean intercrop. Results of the experiment revealed that intercrop showed significant and positive effect on yield of soybean and cassava.
A MODULAR DESIGN OF A WALL-CLIMBING ROBOT AND ITS MECHATRONICS CONTROLLER
N.S. Tlale
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: The modular design of a wall-climbing robot, implementing two articulated legs per module (biped robotic modules), is presented in this paper. Modular design improves a wall-climbing robot’s manoeuvrability and flexibility during surface changes or while walking on uneven surfaces. The design of the articulated legs uses four motors to control the posture of the vacuum cups, achieving the best possible contact with the surface. Each leg can contain more than five sensors for effective feedback control, and additional sensors such as gyros, CCD sensors, etc, can be fitted on a module, depending on the robot’s application. As the number of modules used in the design of the robot is increased, the number of actuators and sensors increases exponentially. A distributed mechatronics controller of such systems is presented. AFRIKAANSE OPSOMMING: Modulêre ontwerp van 'n muurklim-robot met twee geskarnierde bene per module (twee-benige robotmodules) word in hierdie artikel weergegee. Modulêre ontwerp verbeter die muurklim-robot se beweeglikheid en aanpasbaarheid tydens veranderings in die loopvlak of terwyl dit loop op ongelyke oppervlaktes. Ontwerp van geskarnierde bene implementeer vier motors wat die ori ntasie van vakuumsuigdoppe beheer om die bes moontlike kontak met die loopvlak te handhaaf. Elke been kan meer as vyf sensors hê vir doeltreffende terugvoerbeheer, en bykomende sensors soos giroskope, CCD sensors, ens. kan by 'n module gevoeg word soos die toepassing van die robot dit mag vereis. Soos die aantal modules wat in die ontwerp van die robot gebruik word, toeneem, neem die aantal aktiveerders en sensors eksponensi el toe. 'n Verdeelde megatroniese beheerder van sulke stelsels word aangebied.
DISTRIBUTED CONTROL ARCHITECTURE OF AN OMNI-DIRECTIONAL AUTONOMOUS GUIDED VEHICLE
N.S. Tlale
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: Omni-directionality is the ability of a mobile robot to move instantaneously in any direction. This paper describes the wheel and controller designs of a Mecanumwheeled, autonomous guided vehicle (AGV) for reconfigurable manufacturing systems. Mecanum wheels use slip developed between rollers and surface, surface and ground, to achieve omni-directionality. An advantage of omni-directional robotic platforms is that they are capable of performing tasks in congested environments such as those found in factory workshops, narrow aisles, warehouses, etc. Controller Area Network (CAN) is implemented as a distributed controller to control motion and navigation tasks of the developed robot. The design of the distributed controller is described and its performance analyzed. This increases the reliability and functionality of the mobile robot. AFRIKAANSE OPSOMMING: Die artikel beskryf wiel - en beheerontwerpe van ‘n veelrigting mobiele robot. Die robot is ‘n selfstandigbeheerde voertuig vir gebruik by vervaardigingstelsels met veranderbare konfigurasie. Die ontwerp van die robot en bypassende beheerstelsel word beskryf en ontleed teen die agterground van bewegings – en navigeertake. Die betroubaarheid en funksionering van die sisteem word beoordeel.
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