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Co-Authors
- D. N. Bhattacharyya
- R. S. Iyer
- S. V. Chikale
- J. S. Minimol
- T. K. Shija
- Nanthitha Vasanthan
- K. M. Sunil
- B. Suma
- P. N. Ganga Visalakshy
- Shilpa J. Bhonsle
- D. V. Kulkarni
- A. De
- M. Radha Ramanan
- R. Radhakrishnan
- V. Chithambaram
- N. Dharani Rajan
- S. Jayakumar
- G. M. Rajesh
- Sylaja
- R. Sambasivam
- Subhash Kondowar
- Vilas A. Tabhane
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Krishnan, S.
- Surfactants from Bodied Oils
Abstract Views :150 |
PDF Views:2
Authors
Affiliations
1 Alchemie Research Centre, P.O. Box 155, Thane-Belopur Road, Thane 400601, Maharashtra, IN
1 Alchemie Research Centre, P.O. Box 155, Thane-Belopur Road, Thane 400601, Maharashtra, IN
Source
Journal of Surface Science and Technology, Vol 5, No 2 (1989), Pagination: 187-189Abstract
A study has been made on the preparation and evaluation of alkanolamides from bodied linseed oil. The oligomeric fatty acids isolated from the bodied oils through saponification were reacted with diethanolamine. The surface active properties of the diethanolamides mixed with esters were investigated. The amide:ester ratio in the product was found to have a great bearing on the performance of the surfactants in making water-in-oil emulsion and gas bubble stabilization.Keywords
Bodied Oils, Surfactants, Emulsification, Gas Bubble Stabilization.
- Seasonality in Cocoa: Weather Influence on Pod Characters of Cocoa Clones
Abstract Views :332 |
PDF Views:1
Authors
Affiliations
1 Cocoa Research Centre, Kerala Agricultural University, THRISSUR (KERALA), IN
2 Centre, Kerala Agricultural University, THRISSUR (KERALA), IN
3 Centre for Climate Change Research, Kerala Agricultural University, THRISSUR (KERALA), IN
4 Department of Agricultural Statistics, College of Horticulture, Kerala Agricultural University, THRISSUR (KERALA), IN
1 Cocoa Research Centre, Kerala Agricultural University, THRISSUR (KERALA), IN
2 Centre, Kerala Agricultural University, THRISSUR (KERALA), IN
3 Centre for Climate Change Research, Kerala Agricultural University, THRISSUR (KERALA), IN
4 Department of Agricultural Statistics, College of Horticulture, Kerala Agricultural University, THRISSUR (KERALA), IN
Source
International Journal of Plant Sciences, Vol 10, No 2 (2015), Pagination: 102-107Abstract
Cocoa (Theobroma cacao L.) is the only source of chocolate and worldwide number of people depends upon cocoa for their lively hood. Now the crop is spreading to non-traditional area and it is very much necessary to study the impact of environment of crop production. The present study included seven released selections from Kerala Agricultural University and observations were taken for three years 2012, 13 and 14. From performance analysis CCRP IV and CCRP VI were found to be the best varieties with big pods (440.887 g and 419.0 g, respectively) and high wet bean weight (110.02 g and 107.95 g, respectively). Increase in morning humidity resulted in small pods. Wet bean weight showed a negative correlation with temperature and positive correlation with rainfall and number of rainy days. Almost all varieties showed maximum potential during post monsoon season. Increase in pod and bean characters during post monsoon period can be attributed to favourable condition prevailed during monsoon.Keywords
Cocoa, Theobroma cacao L., Seasonal Influence, Pod Weight, Wet Bean Weight, Weather.- Survival Capacity of Ceutorhynchus portulacae Marshall during Non-Availability of Food
Abstract Views :181 |
PDF Views:115
Authors
Affiliations
1 Indian Institute of Horticultural Research (lear) Hessarghatta Lake Post, Bangalore 560089, Karnataka, IN
2 Department of Zoology, Bangalore University, Bangalore, IN
1 Indian Institute of Horticultural Research (lear) Hessarghatta Lake Post, Bangalore 560089, Karnataka, IN
2 Department of Zoology, Bangalore University, Bangalore, IN
Source
Journal of Biological Control, Vol 17, No 1 (2003), Pagination: 95-96Abstract
Forty-five days old adults of Ceutorhynchus portulacae Marshall could survive up to 55 days, hiding In cracks and crevices in soil which reflects their survival capacity in the absence of food when Portulaca oleracea was completely removed by mechanical or chemical means and can be a probable candidate for the biological control of this deadly weed.Keywords
Ceutorhynchus portulacae, Portulaca oleracea, Survival, Unfavourable Periods.Full Text
- Quiescence Behaviour in Ceuthorhynchus portulacae Marshall, a Potential Biocontrol Agent of the Purslane Weed, Portulaca oleracea L.
Abstract Views :207 |
PDF Views:116
Authors
Affiliations
1 Division of Entomology and Nematology Indian Institute of Horticultural Research Hessarghatta Lake Post, Bangalore, 560089, Karnataka, IN
2 Department of Zoology, Bangalore University, Bangalore, IN
1 Division of Entomology and Nematology Indian Institute of Horticultural Research Hessarghatta Lake Post, Bangalore, 560089, Karnataka, IN
2 Department of Zoology, Bangalore University, Bangalore, IN
Source
Journal of Biological Control, Vol 15, No 1 (2001), Pagination: 27-30Abstract
Portulaca oleracea L. is considered as a serious problematic weed of vegetables, vineyards and banana orchards in many parts of India. Ceutorhynchus portulacae Marshall (Coleoptera: Curculionidae) was identified as a potential indigenous biocontrol agent, which could be utilised for the effective suppression of the purslane weed. Field and laboratory studies in Bangalore revealed that the adults cease to feed and multiply during the cold winter months of November-January, indicating the possibility of diapause in the adult stage. A study was carried out to determine whether adults undergo diapause and the factors governing it. Behavioural and physiological observations showed that the adults were not capable of undergoing any diapause. But, they remain inactive during the cold winter period and become active with the advent of favourable environmental conditions.Keywords
Biocontrol Agent, Ceutorhynchus portulacae, Diapause, Portulaca oleracea.Full Text
- Molecular Genetic Diversity of Landraces, Cultivars and Wild Relatives of Rice of Goa
Abstract Views :214 |
PDF Views:73
Authors
Affiliations
1 Department of Botany, Goa University, Goa 403 206, IN
1 Department of Botany, Goa University, Goa 403 206, IN
Source
Current Science, Vol 111, No 10 (2016), Pagination: 1675-1679Abstract
We studied 51 rice varieties to understand their genetic diversity. Out of 19 ISSR primers, 15 primers produced reproducible bands. Out of 110 ISSR bands, 104 were polymorphic bands with an average of 6.93 bands per primer. The amount of polymorphism varied from 50% to 100%, with an average of 92%. Genetic identity value ranged from 0.5091 to 0.9727, with an average of 0.740. Dendrogram revealed the formation of four major clusters. Wild rice Oryza rufipogon formed a separate clade, indicating its uniqueness. Our study opens up avenues for use of traditional rice varieties for rice breeding, genome-wide association mapping and conservation of rice germplasm.Keywords
Genetic Diversity, ISSR Markers, Landraces, Oryza sativa, Oryza rufipogon.Full Text
References
- Yu, S. B., Xu, W. J., Vijayakumar, C. H. M., Ali, J., Fu, B. Y. and Xu, J. L., Molecular diversity and multilocus organization of the parental lines used in the International Rice Molecular Breeding Program. Theor. Appl. Genet, 2003, 108, 131–140.
- Garris, A. J., Tai, T. H., Coburn, J., Kresovich, S. and McCouch, S., Genetic structure and diversity in Oryza sativa L. Genetics, 2005, 169, 1631–1638.
- Caicedo, A. L., Williamson, S. H., Hernandez, R. D., Boyko, A., Fledel-Alon, A. and York, T. L., Genome-wide patterns of nucleotide polymorphism in domesticated rice. PLoS Genetics, 2007, 163(3), 1754–1756.
- Jain, S., Jain, R. and McCouch, S., Genetic analysis of Indian aromatic and quality rice (Oryza sativa L.) germplasm using panels of fluorescently labelled microsatellite markers. Theor. Appl. Genet, 2004, 109(5), 965–977.
- Gao, L. Z., ChiHong, Z., LiPing, C., JiZeng, J., ZongEn, Q. and YuShen, D., Microsatellite diversity within Oryza sativa with emphasis on indica-japonica divergence. Genet. Res., 2005, 85, 1–14.
- Pessoa-Filho, M., Belo, A., Alcochete, A., Rangel, P. and Ferreira, M., A set of multiplex panels of microsatellite markers for rapid molecular characterization of rice accessions. BMC Plant Biol., 2007, 7–23.
- Thomson, M., Septiningsih, E., Suwardjo, F., Santoso, T., Silitonga, T. and McCouch, S., Genetic diversity analysis of traditional and improved Indonesian rice (Oryza sativa L.) germplasm using microsatellite markers. Theor. Appl. Genet., 2007, 114, 559–568.
- Thomson, M. J., Polato, N. R., Prasetiyono, J., Trijatmiko, K. R., Silitonga, T. S. and McCouch, S. R., Genetic diversity of isolated populations of Indonesian landraces of rice (Oryza sativa L.) collected in East Kalimantan on the island of Borneo. Rice, 2009, 2, 80–92.
- Datta, S. K., Lina, B., Jumin, T., Norman, T., Olive, P. and Datta, K., Production and Molecular Evaluation of Transgenic Rice Plants, International Rice Research Institute (IRRI), Philippines, 1997, pp. 35–36.
- Parab, G. V. and Krishnan, S., Assessment of genetic variation among populations of Rhynchostylis retusa, an epiphytic orchid from Goa, India using ISSR and RAPD markers. Indian J. Biotechnol., 2008, 7, 313–319.
- Rohlf, F. J., NTSYS-PC: Numerical Taxonomy and Multivariate Analysis System Version 2.0. State University of New York, Stony Brook, New York, USA, 1992.
- Tesfaye, K., Genetic diversity of wild Cofea arabica populations in Ethiopia as a contribution to conservation and use planning. ecology and development series (Ph D thesis), University of Bonn, Germany, 2006.
- Hou, X. L. et al., Regulation of the expression of OsIPS1 and OsIPS2 in rice via systemic and local Pi signalling and hormones. Plant Cell Environ., 2005, 28(3), 353–365.
- Parab, G. V., Krishnan, S., Janarthanam, M. K., Sivaprakash, K. R. and Parida, A., ISSR and RAPD markers assessed genetic variation of Aerides maculosum – an epiphytic orchid from Goa, India. J. Plant Biochem. Biot., 2008, 17(1), 107–109.
- Ge, S., Oliveira, G. C. X., Schaal, B. A., Gao, L. Z. and Hong, D. Y., RAPD variation within and between natural populations of the wild rice Oryza rufipogon from China and Brazil. Heredity, 1999, 82, 638–644.
- Qian, W., Ge, S. and Hong, D. Y., Genetic variation within and among populations of a wild rice Oryza granulata from China detected by RAPD and ISSR markers. Theor. Appl. Genet, 2001, 102, 440–449.
- Joshi, S. P., Gupta, V. S., Aggarwal, R. K., Ranjekar, P. K. and Brar, D. S., Genetic diversity and phylogenetic relationship as revealed by inter-simple sequence repeat (ISSR) polymorphism in the genus Oryza. Theor. Appl. Genet., 2000, 100, 1311–1320.
- Reddy, M. P., Sarla, N., Neeraja, C. N. and Siddiq, E. A., Assessing genetic variation among Asian A-genome Oryza species using inter simple sequence repeat (ISSR) polymorphism. In Fourth International Rice Genetics Symposium, IRRI, Philippines, 22–27 October 2000.
- Vanniarajan, C., Vinod, K. K. and Pereira, A., Molecular evaluation of genetic diversity and association studies in rice (Oryza sativa L.). J. Genet., 2012, 91(1), 9–19.
- Tateoka, T., Taxonomic studies of Oryza. III, Key to the species and their enumeration. Botanical Magazine Tokyo, 1963, 76, 165–173.
- Sharma, S. D. and Shastry, S. V. S., Taxonomic studies in genus Oryza L. III. O. rufipogon Griff. sensu stricto and O. nivara Sharma et Shastry nom. nov. Indian J. Genet. Pl. Br., 1965, 25, 157–167.
- An Investigation on Effect of Process Parameters on Weld Bead Profile of Modified 9Cr-1Mo Steel by Pulsed GMAW
Abstract Views :243 |
PDF Views:4
Authors
Affiliations
1 Larsen & Toubro Limited, Heavy Engineering IC, Powai Campus, Mumbai 400072, IN
2 Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai 400072, IN
1 Larsen & Toubro Limited, Heavy Engineering IC, Powai Campus, Mumbai 400072, IN
2 Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai 400072, IN
Source
Indian Welding Journal, Vol 47, No 4 (2014), Pagination: 23-23Abstract
Environmental regulations requiring reduced C02 emissions coupled with demand for greater efficiency are demanding greater use of advanced creep resisting steels such as modified 9Cr-lMo (P91) for high temperature components in the power generation industry. Traditionally, modified 9Cr-lMo steels are welded using gas tungsten arc welding, shielded metal arc welding and submerged arc welding processes. In order to reduce costs and downtime, particularly for site repairs, recently there is much interest in the use of high productivity welding processes; particularly gas shielded welding processes such as Gas Metal Arc Welding (GMAW). However, the situation with GMAW, particularly with active gas mixtures, is more complex because of the variable recovery of key elements such as Mn, Si, and Nb/Cb. It has been reported that the solid wire Gas Metal Arc Welding (GMAW) process has not found widespread use in the industry mainly due to concerns over lack-of-fusion, sensitivity to welder error and demands for more sophisticated power sources. However, in recent past, as a process of potentially high productivity, interest in GMAW for welding P91 materials is increasing for Industrial applications.
In the present investigation, bead-in-groove trials are performed on a 12mm thick modified 9Cr-lMo material by pulsed current gas metal arc welding (GMAW-P) process. Two primary parameters like current and weld travel speed are considered in the present experiment and their effect on weld bead geometry, weld metal toughness and weld metal microstructure are discussed. The samples are also subjected to chemical analysis, oxygen content measurement, and inclusion level&hardness survey after PWHT. Response surface methodology (RSM) design approach is used to develop a mathematical relation between the input variables (current and speed) and responses. The developed model is then compared with the experimental results; it is found that the deviation falls within the limit of a 95% confidence level. The direct and interactive effects of the process parameters are also discussed in the present paper.
- Synthesis, Optical, Mechanical and Thermal Studies on Novel Nonlinear Optical Bisthiourea Potassium Nitrate Crystal By Solution Growth Technique
Abstract Views :112 |
PDF Views:0
Authors
Affiliations
1 Department of Physics, Arasu Engineering College, Kumbakonam, IN
2 Department of Physics, Jamal Mohamed College, Tiruchirappalli, IN
3 Department of Physics, B.S Abdur Rahman University, Vandaloor, Chennai, IN
4 Research Centre Physics, Dhanalakshmi College of Engineering, Tambaram, Chennai, IN
1 Department of Physics, Arasu Engineering College, Kumbakonam, IN
2 Department of Physics, Jamal Mohamed College, Tiruchirappalli, IN
3 Department of Physics, B.S Abdur Rahman University, Vandaloor, Chennai, IN
4 Research Centre Physics, Dhanalakshmi College of Engineering, Tambaram, Chennai, IN
Source
International Journal of Scientific Engineering and Technology, Vol 2, No 7 (2013), Pagination: 710-712Abstract
Bisthiourea Potassium nitrate, a new semiorganic nonlinear optical crystal, has been grown by solution growth slow evaporation technique for the first time. The grown crystal were characterised by single XRD to conform lattice parameter. The presence of functional groups was confirmed by using fourier transform infrared (FTIR) analysis. Optical behaviour such as UV – Vis – NIR absorption spectrum was carried and the UV cut-off wavelength for the grown crystal is at 270 nm. Thermal analysis was carried out to determine the thermal stability and the melting point of the grown crystal using TG/DTA. The mechanical properties of the grown crystals have been studied using Vickers micro hardness tester for different loads. Second - Harmonic generation were investigated to explore nonlinear optical characteristics of the materials using Kurtz powder technique.Keywords
FTIR, XRD, NIR, BTPN.Full Text
- Synthesis, Optical and Thermal Studies on Novel Nonlinear Optical L–Histidine Sodium Thiosulphate Crystal by Solution growth Technique
Abstract Views :106 |
PDF Views:0
Authors
Affiliations
1 Department of Physics, Arasu Engineering College, Kumbakonam, IN
2 Department of Physics, Jamal Mohamed College, Tiruchirappalli, IN
3 Department of Physics, B.S Abdur Rahman University, Vandaloor, Chennai, IN
4 Research Centre Physics, Dhanalakshmi College of engineering, Tambaram, Chennai, IN
1 Department of Physics, Arasu Engineering College, Kumbakonam, IN
2 Department of Physics, Jamal Mohamed College, Tiruchirappalli, IN
3 Department of Physics, B.S Abdur Rahman University, Vandaloor, Chennai, IN
4 Research Centre Physics, Dhanalakshmi College of engineering, Tambaram, Chennai, IN
Source
International Journal of Scientific Engineering and Technology, Vol 2, No 6 (2013), Pagination: 485-487Abstract
A semi-organic non-linear optical single crystal of L–Histidine Sodium Thiosulphate has been grown from aqueous solution by slow evaporation technique. The lattice parameters of the grown crystals were identified using single crystal X-ray analysis. The functional groups present in the crystal were identified using FTIR analysis. Optical absorption studies have confirmed that the grown crystal possesses less absorption in the entire visible region and UV cut-off is found to be at 230 nm. Thermal stability of the grown crystal was identified from TG-DTA analysis. The mechanical properties of the grown crystals have been studied using Vickers microhardness tester for different loads. The presence of second harmonic generation (SHG) for the grown crystal was confirmed by Kurtz powder technique.Keywords
FTIR, SHG, NLO, LHSTSP.Full Text
- Ultrasonic, XRD and Micro-Hardness Studies on Single Crystal of Aluminum Ammonium Sulfate (AAS)
Abstract Views :245 |
PDF Views:2
Authors
Affiliations
1 Department of Physics, RKM Vivekananda College, Mylapore, Chennai-600004, IN
2 Department of Physics, D.G. Vaishnav College, Chennai-600106, IN
3 Department of Physics, Urumu Dhanalakshmi College, Trichy, Tiruchirappalli-620019, IN
1 Department of Physics, RKM Vivekananda College, Mylapore, Chennai-600004, IN
2 Department of Physics, D.G. Vaishnav College, Chennai-600106, IN
3 Department of Physics, Urumu Dhanalakshmi College, Trichy, Tiruchirappalli-620019, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 42, No 1 (2020), Pagination: 16-20Abstract
Single crystal of aluminum ammonium sulfate has been grown. Crystals are subjected to X-ray diffraction analysis and Acoustical studies. Acoustical studies are made before and after crystal growth formation. Acoustical parameters like acoustical impedance (Z), free length (Lf), compressibility (β), relaxation time (τ), attenuation (α), coefficient of absorption (α/f2) are determined from velocity, density and viscosity measurements. The crystal is formed at 0.453 gm/ml and interesting changes in physical and chemical properties takes place. The smaller value of Hardness refers to soft crystal. Surface morphology of the crystal grown was studied by scanning electron microscope (SEM). From the observation of fluorescence spectra the luminescence properties of planar single crystal of AAS is studied. XRD studies confirm crystal belongs to cubic system. The cell parameters are a = 24.56A°, b = 24.56A°, c = 24.56A°, α = β = γ = 90°°, volume 14815A03.Keywords
Crystal Growth, XRD, Micro Hardness Studies, Ultrasonic Studie, Aluminum Ammonium Sulfate.Full Text
References
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- He X.H., Yong Y.M., Yu G.Z., Zhang G.J., Yang C. and Jin X. Adsorption of ceprolectam on surface of ammonium sulfate crystal. J. Chem. Indust. Engg. 61(11) (2010) 2849-2854.
- Mullin J.W., Chakroborty M. and Mehta K. Nucleation and growth of ammonium sulfate crystal from aqueous solution. J. Appl. Chem. 20 (1970) 367-371.
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- Davey R.J. and Mulli J.W. Growth of the {100} face of ammonium dihydrogen Phosphate Crystal in the presence of Ionic Species. J. Crystal growth 26 (1974) 203-208.
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- Su G., Zhuang X., He Y., Li Z. and Wang G. Ammonium nickel sulfate crystal: a new ultraviolet light filter. J. Physics D. 35 (2002) 2652-2655.
- Baviskar S.J. and Bhavsar D.S. Growth and characterization ofammonium nickel sulfate crystal grown by gel technique. Arch Appl Sci Res. 3 (2011) 279-284.
- Vasudevan G., Anbusrinivasan P., Madhurambal G. and Mojumdar S.C. Thermal analysis effect of dopants spectral characterization and growth aspect of KAP crystals. Therm Anal Calorim. 96 (2009) 99-102.
- Chemla D.S. and Zyss J. Optical properties of Organic Molecules and Crystal, New York, 1991.
- Jordes J., Appermont T., Gielen B., Van Gerven T. and Breaken L. Sono fragmentation: Effect of ultrasound frequency and power on particle breakage . Cryst .Growth Des. 16 (2016) 6167-6177.
- Su C.S., Liao C.Y. and Jheng W.D. Particle size control and crystal habit modification of phenacetin using ultrasonic crystallization. Chem. Eng. Technol 38 (2015) 181-186.
- Growth and Studies on Aluminium Ammonium Sulphate and Thiourea
Abstract Views :177 |
PDF Views:2
Authors
G. M. Rajesh
1,
S. Jayakumar
1,
N. Dharani Rajan
1,
S. Krishnan
1,
Sylaja
2,
R. Sambasivam
3,
Subhash Kondowar
4,
Vilas A. Tabhane
5
Affiliations
1 Department of Physics, RKM Vivekananda College, University of Madras, Chennai-600 004, IN
2 Department of Physics, D.G. Vaishnav College, Chennai-600 106, IN
3 Department of Physics, Urumu Dhanalakshmi College, Trichy-620 019, IN
4 Department of Physics, RTM Nagpur University, Nagpur-440 033, IN
5 Department of Physics, Savitribai Phule Pune University, Pune-411 007, IN
1 Department of Physics, RKM Vivekananda College, University of Madras, Chennai-600 004, IN
2 Department of Physics, D.G. Vaishnav College, Chennai-600 106, IN
3 Department of Physics, Urumu Dhanalakshmi College, Trichy-620 019, IN
4 Department of Physics, RTM Nagpur University, Nagpur-440 033, IN
5 Department of Physics, Savitribai Phule Pune University, Pune-411 007, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 42, No 4 (2020), Pagination: 100-103Abstract
Ultrasonic velocity has been estimated in crystals namely aluminum ammonium sulfate and thiourea in water. XRD analysis were carried out at the temperature 303K. Acoustical parameters, stability constant had been obtained for the single crystal aluminum ammonium sulfate and thiourea. Internal pressure, free volume and molar cohesive energy had been obtained for the crystal. From the XRD studies the crystal belongs to cubic structure.Keywords
Ultrasonic Velocity, Aluminum Ammonium Sulfate, Thiourea.Full Text
References
- Rajesh G.M., Jayakumar S., Krishan, Rajan N.D., Sylaja, Sambasivam R. and Gayathri G.S., Growth and studies on thiowea in aluminium ammonium solvent, Journal of Engineering Sciences, 11 (2020) 564-569.
- Helmboldt O., Keith Hudson L., Misra C., Wefers K., Heck W., Stark H., Danner M. and Rösch N., Aluminium Compounds inorganic” in Ullmann’s Encyclopedia of Industrial Chemistry, (2007), Wiley VCH.