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Search Results: 1 - 10 of 747 matches for " Parthasarathi Panda "
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Physicochemical, Thermal and Spectroscopic Characterization of Sodium Selenate Using XRD, PSD, DSC, TGA/DTG, UV-vis, and FT-IR
Mahendra Kumar Trivedi, Kalyan Kumar Sethi, Parthasarathi Panda, Snehasis Jana
Marmara Pharmaceutical Journal , 2017, DOI: 10.12991/marupj.300796
Abstract: Sodium selenate is an important inorganic compound but lacks reliable and accurate physico-chemical and spectral characterization information. The study was carried out for the in-depth physicochemical, thermal, and spectroscopic characterization of sodium selenate using various analytical techniques. The powder X-ray diffraction spectroscopy analysis showed well-defined and sharp peaks indicated sodium selenate is crystalline in nature. The crystallite size was found to be in the range of 28.75 to 49.97 nm. The average particle size was found to be of 3.93 (d10), 14.44 (d50), and 40.648 (d90) μm with an average surface area of 0.676 m2/g. The differential scanning calorimetry showed the endothermic inflation at 588.81 °C with the latent heat of fusion 103 J/g. The thermogravimetric analysis revealed two steps of the thermal degradation process. Similarly, the differential thermogravimetric analysis exhibited the major peaks in the thermogram and disclosed Tmax at 852.65 °C. The UV-visible spectrum showed maximum absorbance at 205.1 nm (λmax). The Fourier transform infrared spectrum showed a peak at 888 cm-1 due to the Se-O stretching. This information would be very much useful in the field of nutraceuticals/ pharmaceuticals and other industries using sodium selenate as an ingredient.
Gas Chromatography-Mass Spectrometric Analysis of Isotopic Abundance of 13C, 2H, and 18O in Biofield Energy Treated p-tertiary Butylphenol (PTBP)
Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak, Parthasarathi Panda, Snehasis Jana
American Journal of Chemical Engineering , 2016, DOI: 10.11648/j.ajche.20160404.11
Abstract: P-tert-Butyphenol (PTBP) is a phenolic monomer used in the synthesis of numerous industrially useful chemicals. The current research work aimed to evaluate the effect of the biofield energy treatment on the isotopic abundance ratios of PM 1/PM and PM 2/PM in PTBP using gas chromatography - mass spectrometry (GC-MS). The sample, PTBP was distributed into two parts - one part was designated as control PTBP and another part was considered as biofield energy treated PTBP. The biofield energy treatment was achieved through unique biofield energy transmission process by Mr. Trivedi (also known as The Trivedi Effect). T1, T2, T3, and T4 were indicated to the different time interval analysis of the biofield treated PTBP. The GC-MS spectra of the both control and biofield treated PTBP showed the presence of molecular ion peak [M ] at m/z 150 (calculated 150.10 for C10H14O) along with eight major fragmented peaks at m/z 135, 107, 95, 91, 77, 65, 41, and 39, which might be due to C10H15 , C7H7O or C8H11 , C6H7O , C7H7 , C6H5 , C5H5 , C3H5 , and C3H3? ? ions, respectively. The relative intensities of the parent molecule and other fragmented ions of the biofield treated PTBP were altered as compared to the control PTBP. The percentage in the isotopic abundance ratio of PM 1/PM was enhanced in the biofield treated PTBP at T2, T3 and T4 by 1.60%, 3.57%, and 120.13%, respectively while it was decreased by 4.14% in the treated sample at T1 with respect to the control PTBP. Consequently, the isotopic abundance ratio of PM 2/PM was increased in the biofield treated PTBP at T1, T3, and T4 by 1.28%, 2.56%, and 123.08%, respectively with respect to the control sample. On the other hand, it was reduced in the biofield treated sample at T2 by 1.28% as compared to the control PTBP. Concisely, 13C, 2H, and 17O contributions from (C10H14O) to m/z 151 and 18O contribution from (C10H14O) to m/z 152 in the biofield treated PTBP were changed with respect to the control sample and was found to have time dependent effect. The biofield energy treated PTBP might display isotope effects such as different physicochemical and thermal properties, rate of the reaction, selectivity and binding energy due to the changed isotopic abundance ratio as compared to the control sample. Biofield treated PTBP could be valuable for the designing new chemicals and pharmaceuticals through using its kinetic isotope effects.
Determination of Isotopic Abundance of 13C/12C or 2H/1H and 18O/16O in Biofield Energy Treated 1-Chloro-3-Nitrobenzene (3-CNB) Using Gas Chromatography-Mass Spectrometry
Mahendra Kumar Trivedi, Alice Branton, Dahryn Trivedi, Gopal Nayak, Parthasarathi Panda, Snehasis Jana
Science Journal of Analytical Chemistry , 2016, DOI: 10.11648/j.sjac.20160404.11
Abstract: 1-Chloro-3-nitrobenzene (3-CNB) is an aromatic halo-amine compound used as chemical intermediate for the production of several fine chemicals like pharmaceuticals, dyes, agricultural chemicals, etc. The stable isotope ratio analysis has drawn attention in numerous fields such as agricultural, food authenticity, biochemistry, etc. The objective of the current research was to investigate the impact of the biofield energy treatment on the isotopic abundance ratios of PM 1/PM, PM 2/PM and PM 3/PM in 3-CNB using gas chromatography - mass spectrometry (GC-MS). The sample, 3-CNB was divided into two parts - one part was denoted as control and another part was referred as biofield energy treated sample that was treated with biofield energy (The Trivedi Effect). T1, T2, T3, and T4 were represented to different time interval analysis of the biofield treated 3-CNB. The GC-MS spectra of the both control and biofield treated 3-CNB indicated the presence of molecular ion peak [M ] at m/z 157 (calculated 156.99 for C6H4ClNO2) along with same pattern of fragmentation. The relative intensities of the parent molecule and other fragmented ions of the biofield treated 3-CNB were improved as compared to the control 3-CNB. The percentage change of the isotopic abundance ratio of PM 1/PM was significantly increased in the biofield treated 3-CNB at T1, T2 and T3 by 11.62, 18.50, and 29.82%, respectively with respect to the control 3-CNB. Accordingly, the isotopic abundance ratio of PM 2/PM in the biofield treated 3-CNB at T2 and T3 was significantly improved by 15.22 and 35.09%, respectively as compared to the control sample. The isotopic abundance ratios of PM 1/PM and PM 2/PM in the biofield treated 3-CNB at T1 and T4 were changed as compared to the control sample. The percentage change of the isotopic abundance ratio ofPM 3/PM was enhanced in the biofield treated 3-CNB at T1, T2, T3, and T4 by 4.67, 18.69, 31.31 and 6.08%, respectively as compared to the control 3-CNB. The isotopic abundance ratios of PM 1/PM, PM 2/PM and PM 3/PM in the biofield treated 3-CNB changed with the time. So, the biofield energy treated 3-CNB might exhibit the altered isotope effects such as altered physicochemical and thermal properties, binding energy, and the rate of the chemical reaction as compared to the control sample. The biofield energy treated 3-CNB might assist in designing for the synthesis of pharmaceuticals, agricultural chemicals, dyes, corrosion inhibitors and other several useful industrial chemicals.
Improvement of High Temperature Wear Resistance of AISI 316 ASS through NiCrBSiCFe Plasma Spray Coating  [PDF]
N. L . Parthasarathi, Muthukannan Duraiselvam
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2010, DOI: 10.4236/jmmce.2010.97047
Abstract: In this work, the microstructural description, mechanical properties and dry sliding wear features of NiCrBSiCFe plasma sprayed on AISI 316 austenitic stainless steel (ASS) substrate were examined. Defect-free metallurgically bonded coatings were obtained. Wear tests were carried out at 2 m/s sliding velocity under the load of 20N for 2000 m sliding distance at various conditions like room temperature (35°C), 150°C, 250°C and 350°C using a EN-8 medium carbon steel pin as a counterface material. The properties namely coating density, micro hardness, coefficient of friction (CoF) and wear resistance of the coating were studied. NiCrBSiCFe plasma spray coated steel substrate showed superior wear resistance properties than the uncoated steel substrate in all the temperatures. The sliding wear resistance was improved up to 4.5 times than that of the uncoated material. In wear test carried out at 350oC, the coated substrates showed relatively lesser wear than in other temperatures due to the oxide formation, which acted as a protective layer. In addition, the shallow ploughing mode of wear reduced the severity of material removal at 350°C. Using scanning electron microscope (SEM) pictures, the wear properties of the coated steel substrate were evaluated in terms of plastic deformation, material transfer and abrasion.
INFLUENCE OF MOISTURE ON THE ACTIVITY OF PERIONYX EXCAVATUS (PERRIER) AND MICROBIAL-NUTRIENT DYNAMICS OF PRESSMUD VERMICOMPOST
K. Parthasarathi
Iranian Journal of Environmental Health Science & Engineering , 2007,
Abstract: Moisture play a crucial role in vermicomposting of pressmud (filter cake) (P). Five levels of moisture contents of pressmud (55-57%, 60-62%, 65-67%, 70-72% and 75-77%) at 31±2°C on earthworm activities (growth, reproduction and recovery rate of vermicompost) of Perionyx excavatus (Perrier)-an indigenous species and total microbial population, activity and nitrogen, phosphorous, potassium contents in the P vermicompost, over 60 days at an interval of 15, 30, 45 and 60 days have been studied. More and better worm biomass, cocoon production, hatchling number and rate of compost recovery were found in the 65-67% moisture. Besides this level, 70-72% and 60-62% moisture were adequate. On the other hand, 55-57% and 75-77% moisture did not have the desired effects on the growth and reproduction of earthworms and on vermicompost production. Enhanced microbial population and activity and nitrogen, phosphorous, potassium contents were found in fresh vermicomposts from 65-67% moisture than other moisture levels due to the ideal moisture of P for better multiplication of microbial population while passing through the worm gut with more activity, thereby enhancing the mineralization process resulting enhancement of nitrogen, phosphorous, potassium contents, whereas these decreased with decline in moisture content, immobilization and inactivation of microorganisms and/or increase in time (aging).
On how to create motivation in AIDS eye care
Roy Parthasarathi
Indian Journal of Ophthalmology , 2002,
Abstract:
Comments on: Central serous chorioretinopathy after dacryocystorhinostomy operation on the same side
Roy Parthasarathi
Indian Journal of Ophthalmology , 2010,
Abstract:
Is skipping child population an indication of unreliability of APEDS data on hyperopia?
Roy Parthasarathi
Indian Journal of Ophthalmology , 2003,
Abstract:
Awareness of diabetic retinopathy among diabetics
Roy Parthasarathi
Indian Journal of Ophthalmology , 2003,
Abstract:
Transpupillary thermotherapy for choroidal neovascular membrane in age related macular degeneration.
Roy Parthasarathi
Indian Journal of Ophthalmology , 2004,
Abstract:
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