Satish kumar - Academia.edu (original) (raw)
Papers by Satish kumar
Journal of Applied Physics, 2009
There has been a significant amount of research in analyzing the thermal, electrical, and other p... more There has been a significant amount of research in analyzing the thermal, electrical, and other physical properties of carbon nanotubes (CNTs). However, the energy transport mechanism at the contact of two CNTs is still not well understood. This study investigates the interfacial thermal interaction between two CNTs using molecular dynamics simulation and wavelet methods. We place the tubes in a crossed configuration and pass a high temperature pulse along one of the CNTs, while keeping other ends fixed, and analyze the interaction of this pulse with the other nanotube. We apply this technique to nanotubes of chirality ranging from (5,0) to (10,0) to observe the response of tubes with changing diameter. This thermal pulse analysis shows that the coupling between the two tubes is very weak and may be dominated by slow-moving phonon modes with high energy. We perform a wavelet analysis of thermal pulse propagation along a CNT and its impact on another CNT in cross contact. Wavelet tra...
Applied Physics Letters, 2006
Carbon nanotubes (CNT) nanocomposites used for thin-film transistors (TFTs) provide one of the fi... more Carbon nanotubes (CNT) nanocomposites used for thin-film transistors (TFTs) provide one of the first technologically-relevant test beds for two-dimensional heterogeneous percolating systems. The characteristics of these TFTs are predicted by considering the physics of heterogeneous finite-sized networks and interfacial traps at the CNT/gate-oxide interface. Close agreement between our numerical results and different experimental observations demonstrates the capability of the model to predict the characteristics of CNT/nanowire-based TFTs. Such predictive models would simplify device optimization and expedite the development of this nascent TFT technology.
ACS Applied Materials & Interfaces, 2010
Reinforcement efficiency of different types of carbon nanotubes (CNT) have been compared in polya... more Reinforcement efficiency of different types of carbon nanotubes (CNT) have been compared in polyacrylonitrile (PAN) films at nanotube loadings of 5, 10, and 20 wt %. The films are characterized for mechanical, dynamic-mechanical, and thermomechanical properties, electrical conductivity, as well as structural analysis. PAN/CNT composite films exhibit electrical conductivities up to 5500 S/m. Based on X-ray diffraction, PAN crystallinity was shown to increase with the presence of CNT. PAN-CNT interactions in the various composites were compared using conventional activation energy analysis. The strongest physical interaction between PAN and CNT was found in samples containing single-wall carbon nanotubes (SWNT). CNT surface area was also measured using nitrogen gas adsorption and correlated with PAN-CNT composite film mechanical properties, in an effort to better understand PAN-CNT interactions for different CNT morphologies. Solvent behavior of various composite films has also been investigated. The presence of CNT was found to improve PAN solvent resistance.
International Journal of Mechanical and Production Engineering Research and Development, 2018
The increased speed and weight of modern Bus puts the components of a Bus body in a highly dynami... more The increased speed and weight of modern Bus puts the components of a Bus body in a highly dynamic load situation. Bus body is the core component in a vehicle. A classic finite element model of the Bus body is established that focuses on analyzing the behavior of a bus body during static and dynamic load conditions. A finite element model of a pre-stressed bus body is established for static load conditions. The purpose of this research work is to analyze the structural response of the bus body for static, dynamic, and impact loading conditions. In order to conduct this analysis, Finite element Method is applied and ANSYS (FEM Tool) is used. The finite element model is constructed from the structural data and drawings provided by DELHI TRANSPORT CORPORATION (DTC). The research work determines the structural response under the above said loading by evaluating the maximum deflection and stress pattern. The results are presented in the form of graphs and data along with the three-dimensional model of the bus body.
International Journal of Scientific Research, 2012
Mobile cloud computing (MCC) is the availability of cloud computing services in a mobile environm... more Mobile cloud computing (MCC) is the availability of cloud computing services in a mobile environment. By providing optimal services for mobil e users MCC incorporates the elements of mobile networks and cloud computing. In mobile cloud computing, all the data and complicated computing modules can be processed in clouds and mobile devices do not need a powerful configuration like CPU speed, memory capacity etc. However, the mobile devices are facing up with many struggles in their resources (e.g., battery life, storage, and bandwidth) and communications (e.g., privacy, mobility and security). These challenges have great affect in the improvement of service qualities. In this paper, we discuss the overview of mobile cloud computing technology together with the architecture, applications, major characteristics, security issues, advantage and limitation and possibly solution. Index Terms-Mobile Cloud Computing (MCC), Mobile environment, Mobile networks.
International Journal of Scientific Research, 2012
In this survey paper we gathered some details about the cloud computing and its Services which ar... more In this survey paper we gathered some details about the cloud computing and its Services which are providing the different services to the end users. In current technology the cloud computing is very famous buzz word. There are so many users who looking forward for cloud computing and everybody wants to know about it. Now in current days cloud computing has providing a numerous advantages over many fields like Mobile Communication, Educational sector, Business field, Corporate sector with Application developers and for so many fields. A Survey on Cloud Computing and its Services
Oxidation process has been widely used for the treatment of water and wastewater for the removal ... more Oxidation process has been widely used for the treatment of water and wastewater for the removal of various pollutants. The electrochemical (EC) method is an advanced oxidation process that has proved to be an effective treatment alternative for wastewater containing recalcitrant organic compounds which are difficult to remove by the use of the conventional treatment methods. This study focuses on the development of the electrochemical technology for degradation of biologically pre-treated pulp and paper mill wastewater by electrochemical treatment method. In the present study, the effect of initial pH, treatment time, applied voltage, appropriate metal for electrodes for the removal of the pollutants, has been investigated. Removal efficiencies during the electrolysis are also calculated and presented. The present study proves the effectiveness of electrochemical treatment for the toxic pulp and paper mill wastewater. A significant reduction in both COD and color is observed by usi...
ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer, 2012
ABSTRACT The breakdown mechanism of carbon nanotube (CNT) networks is explored using a coupled el... more ABSTRACT The breakdown mechanism of carbon nanotube (CNT) networks is explored using a coupled electro-thermal model, which simulates both electrical and thermal transport in CNT network thin film transistors (CN-TFTs). The numerical results are validated against experimental observations on CN-TFTs with similar device geometry, network statistics, and thermal environment. We find the numerical predictions are in good agreement with experimental measurements of power and temperature of CN-TFT devices. Comparing the simulation results with experiments, we observe that the CNT-substrate thermal conductance per unit length is ∼0.1 Wm−1 K−1. This value represents high contact thermal resistance, but is very close to experimental estimations. The thermal profile and breakdown behavior of the CNT network is observed to be more sensitive to CNT-substrate interfacial thermal conductance compared to that of the CNT-CNT interface. The effect of CNT network density on breakdown behavior is also analyzed for relatively low densities of the network. The peak power dissipation in CN-TFTs before breakdown increases with network density, and this peak power is reached at the same source-to-drain bias (VSD) for all considered densities. The breakdown patterns in CN-TFTs of all considered densities are also observed to have similar characteristics.
DESIDOC Journal of Library & Information Technology, 2015
The study investigates the research contributions of Maharshi Dayanand University, Rohtak in term... more The study investigates the research contributions of Maharshi Dayanand University, Rohtak in terms of its publication output during 2000-2013 as reflected through Scopus database. The study analyses the year-wise research productivity, its citations impact, national and international collaborations, top collaborating institutions, subject-wise distribution of papers, journals used for communication, most preferred journals for publication, most prolific authors, number of citations received, and top cited papers of the University during the period under study.
Synthetic Communications, 2006
... DOI: 10.1080/00397910500451456 Bilal A. Ganai a , Satish ... data, particularly the 1 H NMR s... more ... DOI: 10.1080/00397910500451456 Bilal A. Ganai a , Satish ... data, particularly the 1 H NMR spectra of 3ag, by the indicative appearance of the ABMspin system with characteristic geminal and vicinal coupling constant for the methylene group resonances ( 2 J=911 Hz, 3 J=4 ...
Polymer, 2003
Crystallization behavior of melt-blended polypropylene (PP)/single wall carbon nanotube (SWNT) co... more Crystallization behavior of melt-blended polypropylene (PP)/single wall carbon nanotube (SWNT) composites has been studied using optical microscopy and differential scanning calorimetry. Polypropylene containing 0.8 wt% SWNT exhibits faster crystallization rate as compared to pure polypropylene. PP/SWNT fibers have been spun using typical polypropylene melt spinning conditions. The PP crystallite orientation and the SWNT alignment in the fibers have been studied using X-ray diffraction and polarized Raman spectroscopy, respectively.
Plant Science, 2012
A T-DNA insertional mutant OsAPC6 of rice, with gibberellic acid insensitivity and reduced height... more A T-DNA insertional mutant OsAPC6 of rice, with gibberellic acid insensitivity and reduced height, had up to 45% reduced seed set. The insertion occurred on chromosome 3 of rice in the gene encoding one of the subunits of anaphase promoting complex/Cyclosome APC6. The primary mother cells of the mutant plants had normal meiosis, male gametophyte development and pollen viability. Confocal laser scanning microscopic (CLSM) studies of megagametophyte development showed abnormal mitotic divisions with reduced number or total absence of polar nuclei in about 30-35% megagametophytes of OsAPC6 mutant leading to failure of endosperm and hence embryo and seed development. Abnormal female gametophyte development, high sterility and segregation of tall and gibberellic acid sensitive plants without selectable marker Hpt in the selfed progeny of OsAPC6 mutant plants indicate that the mutant could be maintained in heterozygous condition. The abnormal mitotic divisions during megagametogenesis could be attributed to the inactivation of the APC6/CDC16 of anaphase promoting complex of rice responsible for cell cycle progression during megagametogenesis. Functional validation of the candidate gene through transcriptome profiling and RNAi is in progress.
Physical Review E, 2006
Linear stability analysis is carried out to examine the effect of a depth-dependent modulus on th... more Linear stability analysis is carried out to examine the effect of a depth-dependent modulus on the stability of creeping flow of a Newtonian fluid past an incompressible and impermeable linear elastic solid. Two different systems are considered: ͑i͒ Couette flow past a solid with a continuously varying modulus, and ͑ii͒ Couette flow past two adjacent solids with different thicknesses and moduli. For the first system, we find that between two configurations having the same average modulus, the more stable configuration is the one that has the higher modulus at the interface. In the case of two different configurations having the same interfacial modulus and the same average modulus, the more stable configuration is the one that has the higher modulus right below the interface. For the second system, we find that stability depends in a non-monotonic way on the modulus ratio ͑top modulus to bottom modulus͒ of the two solids. If the thickness of the top solid is less than a critical value, then increasing the modulus ratio initially causes the system to be less stable. Since this critical thickness decreases as the modulus ratio increases, increasing the modulus ratio beyond a certain point causes the system to be more stable. An analysis of the solid-solid interfacial boundary conditions suggests that the relationship between the stiffness of the top solid and the stability of the system is due to a jump in the base-state displacement gradient at the interface which creates a net perturbation displacement.
Photochemistry and Photobiology, 1986
... 2), revealed that changes in Ifl (410 nm) for (Val-Tyr)z2, paralleled that of the homopolymer... more ... 2), revealed that changes in Ifl (410 nm) for (Val-Tyr)z2, paralleled that of the homopolymer; there was a sharp increase in Ifl in ... shown to have an antiparallel beta conformation (Kumar et al., 1986) which is true for the homopolymer (Tyr)so too (Auer and McKnight, 1976, 1978 ...
Journal of Non-Newtonian Fluid Mechanics, 2000
When subject to flow, entangled polymer melts and wormlike micellar solutions can form adjacent r... more When subject to flow, entangled polymer melts and wormlike micellar solutions can form adjacent regions having a shear-rate discontinuity at their interface. This phenomenon is known as shear banding, and has recently been observed using NMR microscopy [M.M. Britton, P.T. Callaghan, Phys. Rev. Lett. 78 (1997) 4930]. However, the mechanisms involved in the banding process are not well understood. One important mechanism may involve secondary flow, and in this work we study the effects of shear banding on secondary flow in viscoelastic fluids between a cone and plate. We model each band as an Oldroyd-B fluid and apply regular perturbation theory assuming that the cone angle is small. Flows with both two and three bands are considered, and we study the effects of elasticity and viscosity contrast between the bands. Elasticity contrast is found to mainly affect the strength of the secondary flow, and can even cause its direction of circulation to reverse. Viscosity contrast is found to localize the secondary flow in the less viscous band, in addition to affecting its strength. These results may help explain why the experimentally observed shear banded structure is relatively stable. They also suggest an interesting mechanism for the formation of cusps at free surfaces.
Journal of Molecular Liquids, 2010
... 1, 3-dioxolane, 298.15, 1.05885, 1.05881 [13], 298.15, 1338, 1338.8 [17]. 1, 4-dioxane, 298.1... more ... 1, 3-dioxolane, 298.15, 1.05885, 1.05881 [13], 298.15, 1338, 1338.8 [17]. 1, 4-dioxane, 298.15, 1.02792, 1.02797 [13], ... The speed of sound values for the purified liquids at 308.15 ± 0.01 K (recorded in Table 1) compare well with their corresponding literature values [17], [18] and ...
Journal of Applied Polymer Science, 2004
... Byung Min 1 ,; Satish Kumar 1 ,; Michael R. Hibbs 2 ,; Hongming Ma 2 ,; David M. Collard 2 ,;... more ... Byung Min 1 ,; Satish Kumar 1 ,; Michael R. Hibbs 2 ,; Hongming Ma 2 ,; David M. Collard 2 ,; David A. Schiraldi 3,*. Article first published online: 2 JUN 2004. DOI: 10.1002/app.20638. Copyright © 2004 Wiley Periodicals, Inc. Issue. ... TD; Jabarin, SA, Polymer 2001, 42, 8975. ...
Desalination and Water Treatment, 2010
Molecular imprinting technique is used for preparing molecularly imprinted polymer (MIP) membrane... more Molecular imprinting technique is used for preparing molecularly imprinted polymer (MIP) membranes of desired recognition site, selectivity and porosity. The novelty of present work is to use a new approach for preparing imprinted monolith membrane, to study the effect of membrane porosity generated due to molecular imprinting on irreversible thermodynamical characteristics like membrane potential, ion transport, fixed charge density and permselectivity. It seems significant in developing membranes of desired selectivity and porosity for the removal and recognition of templates molecules. MIPs of potent herbicides isoproturon and 2,4-d were prepared by radical polymerization using methyl methacrylic acid (MAA) and ethylene glycol dimethacrylate (EGDMA) as functional monomer and cross linking agent. The polymer synthesis took place on a microporous support, which form hydrogen, covalent and ionic bonds with templates in order to form MIP membranes. The significance of this work is to discuss transport study of MIP membranes after creation of molecular recognition sites within the coated MIP. The MIP membranes were studied using theory of irreversible thermodynamics and by evaluating contact angle measurement, surface energy, ion transport study, perms electivity and fixed charge density of the membranes.
Chemical Reviews, 1998
Eberhard Steckhan, born 1943, received the Diploma in Chemistry at the University of Göttingen in... more Eberhard Steckhan, born 1943, received the Diploma in Chemistry at the University of Göttingen in 1969. He received the Ph.D. in Organic Chemistry under the guidance of Professor H.-J. Schäfer in 1971 at the same ...
Chemical Engineering Science, 1979
... the Waslo and GalOr solution (58) at all volume fractions greater than about e =006 This is c... more ... the Waslo and GalOr solution (58) at all volume fractions greater than about e =006 This is consistent with the earlier calculations of Sirkar[7] and ... higher mass transfer coefficients The weak dependence of the product (Sh) (61 (Pe) 2 on Re and Sc as obtained by Ruby and Elgin ...
Journal of Applied Physics, 2009
There has been a significant amount of research in analyzing the thermal, electrical, and other p... more There has been a significant amount of research in analyzing the thermal, electrical, and other physical properties of carbon nanotubes (CNTs). However, the energy transport mechanism at the contact of two CNTs is still not well understood. This study investigates the interfacial thermal interaction between two CNTs using molecular dynamics simulation and wavelet methods. We place the tubes in a crossed configuration and pass a high temperature pulse along one of the CNTs, while keeping other ends fixed, and analyze the interaction of this pulse with the other nanotube. We apply this technique to nanotubes of chirality ranging from (5,0) to (10,0) to observe the response of tubes with changing diameter. This thermal pulse analysis shows that the coupling between the two tubes is very weak and may be dominated by slow-moving phonon modes with high energy. We perform a wavelet analysis of thermal pulse propagation along a CNT and its impact on another CNT in cross contact. Wavelet tra...
Applied Physics Letters, 2006
Carbon nanotubes (CNT) nanocomposites used for thin-film transistors (TFTs) provide one of the fi... more Carbon nanotubes (CNT) nanocomposites used for thin-film transistors (TFTs) provide one of the first technologically-relevant test beds for two-dimensional heterogeneous percolating systems. The characteristics of these TFTs are predicted by considering the physics of heterogeneous finite-sized networks and interfacial traps at the CNT/gate-oxide interface. Close agreement between our numerical results and different experimental observations demonstrates the capability of the model to predict the characteristics of CNT/nanowire-based TFTs. Such predictive models would simplify device optimization and expedite the development of this nascent TFT technology.
ACS Applied Materials & Interfaces, 2010
Reinforcement efficiency of different types of carbon nanotubes (CNT) have been compared in polya... more Reinforcement efficiency of different types of carbon nanotubes (CNT) have been compared in polyacrylonitrile (PAN) films at nanotube loadings of 5, 10, and 20 wt %. The films are characterized for mechanical, dynamic-mechanical, and thermomechanical properties, electrical conductivity, as well as structural analysis. PAN/CNT composite films exhibit electrical conductivities up to 5500 S/m. Based on X-ray diffraction, PAN crystallinity was shown to increase with the presence of CNT. PAN-CNT interactions in the various composites were compared using conventional activation energy analysis. The strongest physical interaction between PAN and CNT was found in samples containing single-wall carbon nanotubes (SWNT). CNT surface area was also measured using nitrogen gas adsorption and correlated with PAN-CNT composite film mechanical properties, in an effort to better understand PAN-CNT interactions for different CNT morphologies. Solvent behavior of various composite films has also been investigated. The presence of CNT was found to improve PAN solvent resistance.
International Journal of Mechanical and Production Engineering Research and Development, 2018
The increased speed and weight of modern Bus puts the components of a Bus body in a highly dynami... more The increased speed and weight of modern Bus puts the components of a Bus body in a highly dynamic load situation. Bus body is the core component in a vehicle. A classic finite element model of the Bus body is established that focuses on analyzing the behavior of a bus body during static and dynamic load conditions. A finite element model of a pre-stressed bus body is established for static load conditions. The purpose of this research work is to analyze the structural response of the bus body for static, dynamic, and impact loading conditions. In order to conduct this analysis, Finite element Method is applied and ANSYS (FEM Tool) is used. The finite element model is constructed from the structural data and drawings provided by DELHI TRANSPORT CORPORATION (DTC). The research work determines the structural response under the above said loading by evaluating the maximum deflection and stress pattern. The results are presented in the form of graphs and data along with the three-dimensional model of the bus body.
International Journal of Scientific Research, 2012
Mobile cloud computing (MCC) is the availability of cloud computing services in a mobile environm... more Mobile cloud computing (MCC) is the availability of cloud computing services in a mobile environment. By providing optimal services for mobil e users MCC incorporates the elements of mobile networks and cloud computing. In mobile cloud computing, all the data and complicated computing modules can be processed in clouds and mobile devices do not need a powerful configuration like CPU speed, memory capacity etc. However, the mobile devices are facing up with many struggles in their resources (e.g., battery life, storage, and bandwidth) and communications (e.g., privacy, mobility and security). These challenges have great affect in the improvement of service qualities. In this paper, we discuss the overview of mobile cloud computing technology together with the architecture, applications, major characteristics, security issues, advantage and limitation and possibly solution. Index Terms-Mobile Cloud Computing (MCC), Mobile environment, Mobile networks.
International Journal of Scientific Research, 2012
In this survey paper we gathered some details about the cloud computing and its Services which ar... more In this survey paper we gathered some details about the cloud computing and its Services which are providing the different services to the end users. In current technology the cloud computing is very famous buzz word. There are so many users who looking forward for cloud computing and everybody wants to know about it. Now in current days cloud computing has providing a numerous advantages over many fields like Mobile Communication, Educational sector, Business field, Corporate sector with Application developers and for so many fields. A Survey on Cloud Computing and its Services
Oxidation process has been widely used for the treatment of water and wastewater for the removal ... more Oxidation process has been widely used for the treatment of water and wastewater for the removal of various pollutants. The electrochemical (EC) method is an advanced oxidation process that has proved to be an effective treatment alternative for wastewater containing recalcitrant organic compounds which are difficult to remove by the use of the conventional treatment methods. This study focuses on the development of the electrochemical technology for degradation of biologically pre-treated pulp and paper mill wastewater by electrochemical treatment method. In the present study, the effect of initial pH, treatment time, applied voltage, appropriate metal for electrodes for the removal of the pollutants, has been investigated. Removal efficiencies during the electrolysis are also calculated and presented. The present study proves the effectiveness of electrochemical treatment for the toxic pulp and paper mill wastewater. A significant reduction in both COD and color is observed by usi...
ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer, 2012
ABSTRACT The breakdown mechanism of carbon nanotube (CNT) networks is explored using a coupled el... more ABSTRACT The breakdown mechanism of carbon nanotube (CNT) networks is explored using a coupled electro-thermal model, which simulates both electrical and thermal transport in CNT network thin film transistors (CN-TFTs). The numerical results are validated against experimental observations on CN-TFTs with similar device geometry, network statistics, and thermal environment. We find the numerical predictions are in good agreement with experimental measurements of power and temperature of CN-TFT devices. Comparing the simulation results with experiments, we observe that the CNT-substrate thermal conductance per unit length is ∼0.1 Wm−1 K−1. This value represents high contact thermal resistance, but is very close to experimental estimations. The thermal profile and breakdown behavior of the CNT network is observed to be more sensitive to CNT-substrate interfacial thermal conductance compared to that of the CNT-CNT interface. The effect of CNT network density on breakdown behavior is also analyzed for relatively low densities of the network. The peak power dissipation in CN-TFTs before breakdown increases with network density, and this peak power is reached at the same source-to-drain bias (VSD) for all considered densities. The breakdown patterns in CN-TFTs of all considered densities are also observed to have similar characteristics.
DESIDOC Journal of Library & Information Technology, 2015
The study investigates the research contributions of Maharshi Dayanand University, Rohtak in term... more The study investigates the research contributions of Maharshi Dayanand University, Rohtak in terms of its publication output during 2000-2013 as reflected through Scopus database. The study analyses the year-wise research productivity, its citations impact, national and international collaborations, top collaborating institutions, subject-wise distribution of papers, journals used for communication, most preferred journals for publication, most prolific authors, number of citations received, and top cited papers of the University during the period under study.
Synthetic Communications, 2006
... DOI: 10.1080/00397910500451456 Bilal A. Ganai a , Satish ... data, particularly the 1 H NMR s... more ... DOI: 10.1080/00397910500451456 Bilal A. Ganai a , Satish ... data, particularly the 1 H NMR spectra of 3ag, by the indicative appearance of the ABMspin system with characteristic geminal and vicinal coupling constant for the methylene group resonances ( 2 J=911 Hz, 3 J=4 ...
Polymer, 2003
Crystallization behavior of melt-blended polypropylene (PP)/single wall carbon nanotube (SWNT) co... more Crystallization behavior of melt-blended polypropylene (PP)/single wall carbon nanotube (SWNT) composites has been studied using optical microscopy and differential scanning calorimetry. Polypropylene containing 0.8 wt% SWNT exhibits faster crystallization rate as compared to pure polypropylene. PP/SWNT fibers have been spun using typical polypropylene melt spinning conditions. The PP crystallite orientation and the SWNT alignment in the fibers have been studied using X-ray diffraction and polarized Raman spectroscopy, respectively.
Plant Science, 2012
A T-DNA insertional mutant OsAPC6 of rice, with gibberellic acid insensitivity and reduced height... more A T-DNA insertional mutant OsAPC6 of rice, with gibberellic acid insensitivity and reduced height, had up to 45% reduced seed set. The insertion occurred on chromosome 3 of rice in the gene encoding one of the subunits of anaphase promoting complex/Cyclosome APC6. The primary mother cells of the mutant plants had normal meiosis, male gametophyte development and pollen viability. Confocal laser scanning microscopic (CLSM) studies of megagametophyte development showed abnormal mitotic divisions with reduced number or total absence of polar nuclei in about 30-35% megagametophytes of OsAPC6 mutant leading to failure of endosperm and hence embryo and seed development. Abnormal female gametophyte development, high sterility and segregation of tall and gibberellic acid sensitive plants without selectable marker Hpt in the selfed progeny of OsAPC6 mutant plants indicate that the mutant could be maintained in heterozygous condition. The abnormal mitotic divisions during megagametogenesis could be attributed to the inactivation of the APC6/CDC16 of anaphase promoting complex of rice responsible for cell cycle progression during megagametogenesis. Functional validation of the candidate gene through transcriptome profiling and RNAi is in progress.
Physical Review E, 2006
Linear stability analysis is carried out to examine the effect of a depth-dependent modulus on th... more Linear stability analysis is carried out to examine the effect of a depth-dependent modulus on the stability of creeping flow of a Newtonian fluid past an incompressible and impermeable linear elastic solid. Two different systems are considered: ͑i͒ Couette flow past a solid with a continuously varying modulus, and ͑ii͒ Couette flow past two adjacent solids with different thicknesses and moduli. For the first system, we find that between two configurations having the same average modulus, the more stable configuration is the one that has the higher modulus at the interface. In the case of two different configurations having the same interfacial modulus and the same average modulus, the more stable configuration is the one that has the higher modulus right below the interface. For the second system, we find that stability depends in a non-monotonic way on the modulus ratio ͑top modulus to bottom modulus͒ of the two solids. If the thickness of the top solid is less than a critical value, then increasing the modulus ratio initially causes the system to be less stable. Since this critical thickness decreases as the modulus ratio increases, increasing the modulus ratio beyond a certain point causes the system to be more stable. An analysis of the solid-solid interfacial boundary conditions suggests that the relationship between the stiffness of the top solid and the stability of the system is due to a jump in the base-state displacement gradient at the interface which creates a net perturbation displacement.
Photochemistry and Photobiology, 1986
... 2), revealed that changes in Ifl (410 nm) for (Val-Tyr)z2, paralleled that of the homopolymer... more ... 2), revealed that changes in Ifl (410 nm) for (Val-Tyr)z2, paralleled that of the homopolymer; there was a sharp increase in Ifl in ... shown to have an antiparallel beta conformation (Kumar et al., 1986) which is true for the homopolymer (Tyr)so too (Auer and McKnight, 1976, 1978 ...
Journal of Non-Newtonian Fluid Mechanics, 2000
When subject to flow, entangled polymer melts and wormlike micellar solutions can form adjacent r... more When subject to flow, entangled polymer melts and wormlike micellar solutions can form adjacent regions having a shear-rate discontinuity at their interface. This phenomenon is known as shear banding, and has recently been observed using NMR microscopy [M.M. Britton, P.T. Callaghan, Phys. Rev. Lett. 78 (1997) 4930]. However, the mechanisms involved in the banding process are not well understood. One important mechanism may involve secondary flow, and in this work we study the effects of shear banding on secondary flow in viscoelastic fluids between a cone and plate. We model each band as an Oldroyd-B fluid and apply regular perturbation theory assuming that the cone angle is small. Flows with both two and three bands are considered, and we study the effects of elasticity and viscosity contrast between the bands. Elasticity contrast is found to mainly affect the strength of the secondary flow, and can even cause its direction of circulation to reverse. Viscosity contrast is found to localize the secondary flow in the less viscous band, in addition to affecting its strength. These results may help explain why the experimentally observed shear banded structure is relatively stable. They also suggest an interesting mechanism for the formation of cusps at free surfaces.
Journal of Molecular Liquids, 2010
... 1, 3-dioxolane, 298.15, 1.05885, 1.05881 [13], 298.15, 1338, 1338.8 [17]. 1, 4-dioxane, 298.1... more ... 1, 3-dioxolane, 298.15, 1.05885, 1.05881 [13], 298.15, 1338, 1338.8 [17]. 1, 4-dioxane, 298.15, 1.02792, 1.02797 [13], ... The speed of sound values for the purified liquids at 308.15 ± 0.01 K (recorded in Table 1) compare well with their corresponding literature values [17], [18] and ...
Journal of Applied Polymer Science, 2004
... Byung Min 1 ,; Satish Kumar 1 ,; Michael R. Hibbs 2 ,; Hongming Ma 2 ,; David M. Collard 2 ,;... more ... Byung Min 1 ,; Satish Kumar 1 ,; Michael R. Hibbs 2 ,; Hongming Ma 2 ,; David M. Collard 2 ,; David A. Schiraldi 3,*. Article first published online: 2 JUN 2004. DOI: 10.1002/app.20638. Copyright © 2004 Wiley Periodicals, Inc. Issue. ... TD; Jabarin, SA, Polymer 2001, 42, 8975. ...
Desalination and Water Treatment, 2010
Molecular imprinting technique is used for preparing molecularly imprinted polymer (MIP) membrane... more Molecular imprinting technique is used for preparing molecularly imprinted polymer (MIP) membranes of desired recognition site, selectivity and porosity. The novelty of present work is to use a new approach for preparing imprinted monolith membrane, to study the effect of membrane porosity generated due to molecular imprinting on irreversible thermodynamical characteristics like membrane potential, ion transport, fixed charge density and permselectivity. It seems significant in developing membranes of desired selectivity and porosity for the removal and recognition of templates molecules. MIPs of potent herbicides isoproturon and 2,4-d were prepared by radical polymerization using methyl methacrylic acid (MAA) and ethylene glycol dimethacrylate (EGDMA) as functional monomer and cross linking agent. The polymer synthesis took place on a microporous support, which form hydrogen, covalent and ionic bonds with templates in order to form MIP membranes. The significance of this work is to discuss transport study of MIP membranes after creation of molecular recognition sites within the coated MIP. The MIP membranes were studied using theory of irreversible thermodynamics and by evaluating contact angle measurement, surface energy, ion transport study, perms electivity and fixed charge density of the membranes.
Chemical Reviews, 1998
Eberhard Steckhan, born 1943, received the Diploma in Chemistry at the University of Göttingen in... more Eberhard Steckhan, born 1943, received the Diploma in Chemistry at the University of Göttingen in 1969. He received the Ph.D. in Organic Chemistry under the guidance of Professor H.-J. Schäfer in 1971 at the same ...
Chemical Engineering Science, 1979
... the Waslo and GalOr solution (58) at all volume fractions greater than about e =006 This is c... more ... the Waslo and GalOr solution (58) at all volume fractions greater than about e =006 This is consistent with the earlier calculations of Sirkar[7] and ... higher mass transfer coefficients The weak dependence of the product (Sh) (61 (Pe) 2 on Re and Sc as obtained by Ruby and Elgin ...