Arun Prasad - Academia.edu (original) (raw)
Papers by Arun Prasad
Flavour Frag J, 2008
The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, ca... more The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate) on the chemical composition and yield of essential oil of rosescented geranium (Pelargonium sp.) was studied in a pot experiment. The content of linalool, geraniol and 10-epi-g-eudesmol in the geranium oil signi¼cantly increased and that of geranial and b-bourbonene decreased by the foliar application of metallic salts as compared to control plants. The increase in the content was 53.3%, 15.8%, 6.6%, 109.2%, 13.3% and 54.2% in linalool and 17.8%, 26.8%, 39.1%, 36.6%, 24.8% and 38.8% in geraniol over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The content of 10-epi-g-eudesmol was increased by 24.2%, 16.3%, 36.9%, 24.2%, 17.1% and 23.7% over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The level of cis-and transrose oxide in geranium oil signi¼cantly increased and that of neral decreased by the application of sodium chlorides, zinc sulphate and nickel sulphate as compared to control. cis-3-Hexenol, isomenthone, neo-isomenthol, citronellol and citronellyl formate 2-phenylethyl tiglate and geranyl tiglate content in geranium oil was not signi¼cantly affected by the foliar application of metallic salts. The herbage and oil yield of geranium signi¼cantly increased by the foliar application of metallic salts as compared with control plants. The increase in yield was 9.9%, 9.4%, 30.6%, 29.7%, 28.6% and 21.6% in herbage and 41.9%, 23.4%, 29.6%, 29.6%, 41.9% and 41.9% in oil yield over control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The oil content in the geranium was enhanced by the application of sodium chloride, calcium chloride, copper sulphate and nickel sulphate, whereas application of iron sulphate and zinc sulphate had no signi¼cant effect on the oil content.
A series of two-dimensional finite element simulations are carried out to evaluate the benefits o... more A series of two-dimensional finite element simulations are carried out to evaluate the benefits of integrating a high modulus geogrid in a paved road. This paper describes the behavior of reinforced asphalt concrete (AC) pavement under plane strain conditions and subjected to monotonic loading. The results of improvement of paved track using geogrids are presented. Geogrid reinforcement into paved road in most cases will improve the performance of the transportation support. Analytical results for three different most possibilities of geogrid reinforcement in the paved road layers have been evaluated. The optimum position was decided based upon the tension stress absorption value, deformation reduce rate and tension cut-off point location. Three types of reinforcing model and one type of unreinforced model of paved road were selected. The results showed that tension stress absorption increases with shifting the geogrid towards the top of the pavement and attains the highest values when the geogrid is placed between asphalt layer and base layer in model.
Every year, 2000 km length of trench is being excavated through an existing pavement in Iran for ... more Every year, 2000 km length of trench is being excavated through an existing pavement in Iran for installing urban waste water pipelines. Many a times, these trenches are not filled back properly resulting in large permanent settlement in the pavement constructed above the trench. Geogrids have been used at the top of the base course to decrease the settlement. This article presents the observed settlements of unreinforced and geogrid reinforced pavement, monitored over a period of 12 months under the urban traffic load. Finite element (FE) analysis of the trench and the pavement, unreinforced and reinforced, under a transient pulse load is also carried out by using PLAXIS. It is observed that the vertical settlement can be greatly reduced by using geogrids in the pavement. The results obtained from case study and PLAXIS show that the geogrids improve the stiffness and strength of asphalt pavement and control the rut formation in the pavement.
Series of nanocrystalline (0.4, 0.6 and 0.8) spinel ferrites have been synthesized using advanced... more Series of nanocrystalline (0.4, 0.6 and 0.8) spinel ferrites have been synthesized using advanced sol‐gel method. The XRD measurements confirm the formation of cubic spinel structure in single phase for all the samples and the average particle sizes are 1418 nm. ...
The magnetic behaviour of the nanocrystalline Ni0.5Cu0.5Fe2O4, synthesized by the co-precipitatio... more The magnetic behaviour of the nanocrystalline Ni0.5Cu0.5Fe2O4, synthesized by the co-precipitation method has been studied. The X-ray diffraction patterns confirm the formation of cubic spinel structure. The dc magnetization measurements show that the samples are superparamagnetic above the blocking temperatures and the blocking temperature increases with particle size. The reduction in saturation magnetization in the case of nanoparticles as compared
Surgical Laparoscopy, Endoscopy & Percutaneous Techniques, 2001
Microscopy and Microanalysis, 2004
Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia,... more Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.
Journal of Minimal Access Surgery, 2007
International Journal of Modern Physics B, 2011
The editorial board discovered that the data points in several sections of the Mossbauer spectra ... more The editorial board discovered that the data points in several sections of the Mossbauer spectra as given in Figs. 3(a) and 3(b) are exactly identical. This is impossible and nonphysical for the measurement of two different samples (or for that matter not even for the same sample!). The only conclusion we can draw from this figure is that some of the data is fabricated. As a result, the results and conclusions as described in the paper are unacceptable. This article is retracted from its publication in Int. J. Mod. Phys. B.
IEEE Transactions on Magnetics, 2000
We have synthesized a series of nanocrystalline ferrite samples with the composition MnxCu1-xFe2O... more We have synthesized a series of nanocrystalline ferrite samples with the composition MnxCu1-xFe2O4 (x=0.2, 0.4, 0.6, 0.8) by an advanced sol-gel auto-combustion method. The X-ray diffraction patterns confirm the existence of single-phase cubic spinel crystal structure of ferrites with lattice parameter ranges from 8.395 ?? to 8.45 ??. We report the equilibrium radii for tetrahedral and octahedral sites in the
Hyperfine Interactions, 2008
The magnetic behaviour of the nanocrystalline Ni 0.5 Cu 0.5 Fe 2 O 4 , synthesized by the co-prec... more The magnetic behaviour of the nanocrystalline Ni 0.5 Cu 0.5 Fe 2 O 4 , synthesized by the co-precipitation method has been studied. The X-ray diffraction patterns confirm the formation of cubic spinel structure. The dc magnetization measurements show that the samples are superparamagnetic above the blocking temperatures and the blocking temperature increases with particle size. The reduction in saturation magnetization in the case of nanoparticles as compared to their bulk counterpart has been explained on the basis that the magnetic moments in the surface layers of a nanoparticle are in a state of frozen disorder. The hump in ZFC curve progressively shift to a lower temperature with increasing field and broader curves at higher field, suggests the spin-glass nature of the system.
Flavour and Fragrance Journal, 2008
The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, ca... more The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate) on the chemical composition and yield of essential oil of rosescented geranium (Pelargonium sp.) was studied in a pot experiment. The content of linalool, geraniol and 10-epi-g-eudesmol in the geranium oil signi¼cantly increased and that of geranial and b-bourbonene decreased by the foliar application of metallic salts as compared to control plants. The increase in the content was 53.3%, 15.8%, 6.6%, 109.2%, 13.3% and 54.2% in linalool and 17.8%, 26.8%, 39.1%, 36.6%, 24.8% and 38.8% in geraniol over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The content of 10-epi-g-eudesmol was increased by 24.2%, 16.3%, 36.9%, 24.2%, 17.1% and 23.7% over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The level of cis-and transrose oxide in geranium oil signi¼cantly increased and that of neral decreased by the application of sodium chlorides, zinc sulphate and nickel sulphate as compared to control. cis-3-Hexenol, isomenthone, neo-isomenthol, citronellol and citronellyl formate 2-phenylethyl tiglate and geranyl tiglate content in geranium oil was not signi¼cantly affected by the foliar application of metallic salts. The herbage and oil yield of geranium signi¼cantly increased by the foliar application of metallic salts as compared with control plants. The increase in yield was 9.9%, 9.4%, 30.6%, 29.7%, 28.6% and 21.6% in herbage and 41.9%, 23.4%, 29.6%, 29.6%, 41.9% and 41.9% in oil yield over control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The oil content in the geranium was enhanced by the application of sodium chloride, calcium chloride, copper sulphate and nickel sulphate, whereas application of iron sulphate and zinc sulphate had no signi¼cant effect on the oil content.
Biology and Fertility of Soils, 2011
... can alter the yield and chemical composition of volatile oil of sweet basil (Ocimum basilicum... more ... can alter the yield and chemical composition of volatile oil of sweet basil (Ocimum basilicum L.) ... The shoot yield, content of essential oil, and root yield of sweet basil were increased by the application of low dose of Cd, Pb, and Ni as compared to control. ...
Electronic Journal of …, 2009
A series of two-dimensional finite element simulations are carried out to evaluate the benefits o... more A series of two-dimensional finite element simulations are carried out to evaluate the benefits of integrating a high modulus geogrid in a paved road. This paper describes the behavior of reinforced asphalt concrete (AC) pavement under plane strain conditions and subjected to monotonic loading. The results of improvement of paved track using geogrids are presented. Geogrid reinforcement into paved road in most cases will improve the performance of the transportation support. Analytical results for three different most possibilities of geogrid reinforcement in the paved road layers have been evaluated. The optimum position was decided based upon the tension stress absorption value, deformation reduce rate and tension cut-off point location. Three types of reinforcing model and one type of unreinforced model of paved road were selected. The results showed that tension stress absorption increases with shifting the geogrid towards the top of the pavement and attains the highest values when the geogrid is placed between asphalt layer and base layer in model.
Steel Research, 1995
Microstructural evolution in the hot strip after finishing and subsequent accelerated cooling on ... more Microstructural evolution in the hot strip after finishing and subsequent accelerated cooling on the runout table has been modelled in order to assess their suitability for further processing. Transient heat transfer and kinetics of phase change comprising austenite to ferrite plus pearlite ...
Http Dx Doi Org 10 1080 10412905 1998 9700899, Dec 9, 2011
ABSTRACT
Http Dx Doi Org 10 1080 10496475 2010 481913, May 17, 2010
The effects of soil sodicity (exchangeable sodium percentage, or ESP) on the growth, alkaloid yie... more The effects of soil sodicity (exchangeable sodium percentage, or ESP) on the growth, alkaloid yield, and cation accumulation of two cultivars of Catharanthus roseus (Nirmal and Dhawal) was studied in a pot experiment. The leaves and stem yield of C. roseus significantly increased with an increase in soil ESP from 4.3 (control) to 16.9, but thereafter yield decreased with further
Proceedings of the Institution of Civil Engineers Geotechnical Engineering, Feb 1, 2011
Flavour Frag J, 2008
The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, ca... more The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate) on the chemical composition and yield of essential oil of rosescented geranium (Pelargonium sp.) was studied in a pot experiment. The content of linalool, geraniol and 10-epi-g-eudesmol in the geranium oil signi¼cantly increased and that of geranial and b-bourbonene decreased by the foliar application of metallic salts as compared to control plants. The increase in the content was 53.3%, 15.8%, 6.6%, 109.2%, 13.3% and 54.2% in linalool and 17.8%, 26.8%, 39.1%, 36.6%, 24.8% and 38.8% in geraniol over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The content of 10-epi-g-eudesmol was increased by 24.2%, 16.3%, 36.9%, 24.2%, 17.1% and 23.7% over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The level of cis-and transrose oxide in geranium oil signi¼cantly increased and that of neral decreased by the application of sodium chlorides, zinc sulphate and nickel sulphate as compared to control. cis-3-Hexenol, isomenthone, neo-isomenthol, citronellol and citronellyl formate 2-phenylethyl tiglate and geranyl tiglate content in geranium oil was not signi¼cantly affected by the foliar application of metallic salts. The herbage and oil yield of geranium signi¼cantly increased by the foliar application of metallic salts as compared with control plants. The increase in yield was 9.9%, 9.4%, 30.6%, 29.7%, 28.6% and 21.6% in herbage and 41.9%, 23.4%, 29.6%, 29.6%, 41.9% and 41.9% in oil yield over control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The oil content in the geranium was enhanced by the application of sodium chloride, calcium chloride, copper sulphate and nickel sulphate, whereas application of iron sulphate and zinc sulphate had no signi¼cant effect on the oil content.
A series of two-dimensional finite element simulations are carried out to evaluate the benefits o... more A series of two-dimensional finite element simulations are carried out to evaluate the benefits of integrating a high modulus geogrid in a paved road. This paper describes the behavior of reinforced asphalt concrete (AC) pavement under plane strain conditions and subjected to monotonic loading. The results of improvement of paved track using geogrids are presented. Geogrid reinforcement into paved road in most cases will improve the performance of the transportation support. Analytical results for three different most possibilities of geogrid reinforcement in the paved road layers have been evaluated. The optimum position was decided based upon the tension stress absorption value, deformation reduce rate and tension cut-off point location. Three types of reinforcing model and one type of unreinforced model of paved road were selected. The results showed that tension stress absorption increases with shifting the geogrid towards the top of the pavement and attains the highest values when the geogrid is placed between asphalt layer and base layer in model.
Every year, 2000 km length of trench is being excavated through an existing pavement in Iran for ... more Every year, 2000 km length of trench is being excavated through an existing pavement in Iran for installing urban waste water pipelines. Many a times, these trenches are not filled back properly resulting in large permanent settlement in the pavement constructed above the trench. Geogrids have been used at the top of the base course to decrease the settlement. This article presents the observed settlements of unreinforced and geogrid reinforced pavement, monitored over a period of 12 months under the urban traffic load. Finite element (FE) analysis of the trench and the pavement, unreinforced and reinforced, under a transient pulse load is also carried out by using PLAXIS. It is observed that the vertical settlement can be greatly reduced by using geogrids in the pavement. The results obtained from case study and PLAXIS show that the geogrids improve the stiffness and strength of asphalt pavement and control the rut formation in the pavement.
Series of nanocrystalline (0.4, 0.6 and 0.8) spinel ferrites have been synthesized using advanced... more Series of nanocrystalline (0.4, 0.6 and 0.8) spinel ferrites have been synthesized using advanced sol‐gel method. The XRD measurements confirm the formation of cubic spinel structure in single phase for all the samples and the average particle sizes are 1418 nm. ...
The magnetic behaviour of the nanocrystalline Ni0.5Cu0.5Fe2O4, synthesized by the co-precipitatio... more The magnetic behaviour of the nanocrystalline Ni0.5Cu0.5Fe2O4, synthesized by the co-precipitation method has been studied. The X-ray diffraction patterns confirm the formation of cubic spinel structure. The dc magnetization measurements show that the samples are superparamagnetic above the blocking temperatures and the blocking temperature increases with particle size. The reduction in saturation magnetization in the case of nanoparticles as compared
Surgical Laparoscopy, Endoscopy & Percutaneous Techniques, 2001
Microscopy and Microanalysis, 2004
Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia,... more Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.
Journal of Minimal Access Surgery, 2007
International Journal of Modern Physics B, 2011
The editorial board discovered that the data points in several sections of the Mossbauer spectra ... more The editorial board discovered that the data points in several sections of the Mossbauer spectra as given in Figs. 3(a) and 3(b) are exactly identical. This is impossible and nonphysical for the measurement of two different samples (or for that matter not even for the same sample!). The only conclusion we can draw from this figure is that some of the data is fabricated. As a result, the results and conclusions as described in the paper are unacceptable. This article is retracted from its publication in Int. J. Mod. Phys. B.
IEEE Transactions on Magnetics, 2000
We have synthesized a series of nanocrystalline ferrite samples with the composition MnxCu1-xFe2O... more We have synthesized a series of nanocrystalline ferrite samples with the composition MnxCu1-xFe2O4 (x=0.2, 0.4, 0.6, 0.8) by an advanced sol-gel auto-combustion method. The X-ray diffraction patterns confirm the existence of single-phase cubic spinel crystal structure of ferrites with lattice parameter ranges from 8.395 ?? to 8.45 ??. We report the equilibrium radii for tetrahedral and octahedral sites in the
Hyperfine Interactions, 2008
The magnetic behaviour of the nanocrystalline Ni 0.5 Cu 0.5 Fe 2 O 4 , synthesized by the co-prec... more The magnetic behaviour of the nanocrystalline Ni 0.5 Cu 0.5 Fe 2 O 4 , synthesized by the co-precipitation method has been studied. The X-ray diffraction patterns confirm the formation of cubic spinel structure. The dc magnetization measurements show that the samples are superparamagnetic above the blocking temperatures and the blocking temperature increases with particle size. The reduction in saturation magnetization in the case of nanoparticles as compared to their bulk counterpart has been explained on the basis that the magnetic moments in the surface layers of a nanoparticle are in a state of frozen disorder. The hump in ZFC curve progressively shift to a lower temperature with increasing field and broader curves at higher field, suggests the spin-glass nature of the system.
Flavour and Fragrance Journal, 2008
The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, ca... more The effects of foliar application of metallic salts (0.5% aqueous solution of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate) on the chemical composition and yield of essential oil of rosescented geranium (Pelargonium sp.) was studied in a pot experiment. The content of linalool, geraniol and 10-epi-g-eudesmol in the geranium oil signi¼cantly increased and that of geranial and b-bourbonene decreased by the foliar application of metallic salts as compared to control plants. The increase in the content was 53.3%, 15.8%, 6.6%, 109.2%, 13.3% and 54.2% in linalool and 17.8%, 26.8%, 39.1%, 36.6%, 24.8% and 38.8% in geraniol over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The content of 10-epi-g-eudesmol was increased by 24.2%, 16.3%, 36.9%, 24.2%, 17.1% and 23.7% over the control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The level of cis-and transrose oxide in geranium oil signi¼cantly increased and that of neral decreased by the application of sodium chlorides, zinc sulphate and nickel sulphate as compared to control. cis-3-Hexenol, isomenthone, neo-isomenthol, citronellol and citronellyl formate 2-phenylethyl tiglate and geranyl tiglate content in geranium oil was not signi¼cantly affected by the foliar application of metallic salts. The herbage and oil yield of geranium signi¼cantly increased by the foliar application of metallic salts as compared with control plants. The increase in yield was 9.9%, 9.4%, 30.6%, 29.7%, 28.6% and 21.6% in herbage and 41.9%, 23.4%, 29.6%, 29.6%, 41.9% and 41.9% in oil yield over control by the application of sodium chloride, calcium chloride, iron sulphate, zinc sulphate, copper sulphate and nickel sulphate, respectively. The oil content in the geranium was enhanced by the application of sodium chloride, calcium chloride, copper sulphate and nickel sulphate, whereas application of iron sulphate and zinc sulphate had no signi¼cant effect on the oil content.
Biology and Fertility of Soils, 2011
... can alter the yield and chemical composition of volatile oil of sweet basil (Ocimum basilicum... more ... can alter the yield and chemical composition of volatile oil of sweet basil (Ocimum basilicum L.) ... The shoot yield, content of essential oil, and root yield of sweet basil were increased by the application of low dose of Cd, Pb, and Ni as compared to control. ...
Electronic Journal of …, 2009
A series of two-dimensional finite element simulations are carried out to evaluate the benefits o... more A series of two-dimensional finite element simulations are carried out to evaluate the benefits of integrating a high modulus geogrid in a paved road. This paper describes the behavior of reinforced asphalt concrete (AC) pavement under plane strain conditions and subjected to monotonic loading. The results of improvement of paved track using geogrids are presented. Geogrid reinforcement into paved road in most cases will improve the performance of the transportation support. Analytical results for three different most possibilities of geogrid reinforcement in the paved road layers have been evaluated. The optimum position was decided based upon the tension stress absorption value, deformation reduce rate and tension cut-off point location. Three types of reinforcing model and one type of unreinforced model of paved road were selected. The results showed that tension stress absorption increases with shifting the geogrid towards the top of the pavement and attains the highest values when the geogrid is placed between asphalt layer and base layer in model.
Steel Research, 1995
Microstructural evolution in the hot strip after finishing and subsequent accelerated cooling on ... more Microstructural evolution in the hot strip after finishing and subsequent accelerated cooling on the runout table has been modelled in order to assess their suitability for further processing. Transient heat transfer and kinetics of phase change comprising austenite to ferrite plus pearlite ...
Http Dx Doi Org 10 1080 10412905 1998 9700899, Dec 9, 2011
ABSTRACT
Http Dx Doi Org 10 1080 10496475 2010 481913, May 17, 2010
The effects of soil sodicity (exchangeable sodium percentage, or ESP) on the growth, alkaloid yie... more The effects of soil sodicity (exchangeable sodium percentage, or ESP) on the growth, alkaloid yield, and cation accumulation of two cultivars of Catharanthus roseus (Nirmal and Dhawal) was studied in a pot experiment. The leaves and stem yield of C. roseus significantly increased with an increase in soil ESP from 4.3 (control) to 16.9, but thereafter yield decreased with further
Proceedings of the Institution of Civil Engineers Geotechnical Engineering, Feb 1, 2011