Ultrasonic assisted synthesis of activated carbon for electromagnetic shielding material from rice husk fibre

911-917Synthesis of any biomaterials/biocomposites for different applications like in electromagnetic wave communication, radar, satellite system needs the processing of its raw material. The suitability of raw material is a challenging task for fabrication technology depending on its type of work performed and efficiency. The surface modification/surface bleaching is performed to facilitate the fillers and matrix for good interlocking between them for improvement in mechanical strength. The material used for microwave absorption or energy storage device in low observable technology (LOT) needs good mechanical strength. The present paper encloses the treatment of raw materials like rice husk with suitable blended chemicals maleic acid with different alcohols. The optimized blended chemicals are determined by computation of different acoustic parameters with the propagation of ultrasonic wave in low frequency range. The rice husk are treated with the optimized blended solution which results in increase of porosity of the material and hence for the fabrication of composites. The element dispersion study images of untreated and treated rice husk signify the suitability of the material for synthesis of microwave absorbing materials

Ultrasonic assisted synthesis of activated carbon for electromagnetic shielding material from rice husk fibre

Synthesis of any biomaterials/biocomposites for different applications like in electromagnetic wave communication, radar, satellite system needs the processing of its raw material. The suitability of raw material is a challenging task for fabrication technology depending on its type of work performed and efficiency. The surface modification/surface bleaching is performed to facilitate the fillers and matrix for good interlocking between them for improvement in mechanical strength. The material used for microwave absorption or energy storage device in low observable technology (LOT) needs good mechanical strength. The present paper encloses the treatment of raw materials like rice husk with suitable blended chemicals maleic acid with different alcohols. The optimized blended chemicals are determined by computation of different acoustic parameters with the propagation of ultrasonic wave in low frequency range. The rice husk are treated with the optimized blended solution which results in increase of porosity of the material and hence for the fabrication of composites. The element dispersion study images of untreated and treated rice husk signify the suitability of the material for synthesis of microwave absorbing materials

Effect of ultrasonication in treatment of crude oil

The demand of petroleum oil has proven its importance in energy sector as well as in the streamlining the economic scenario of the country. In production sector of crude oil, the problem has been observed when the ambient temperature is lower than the wax appearance temperature (WAT), which results the oil become cool leading to deposition of wax. The present paper focuses effect of ultrasonic energy on crude oil sample to reduce the deposition of wax. The propagation of ultrasonic wave in waxy crude oil in presence of suitable blend makes it possible to proper analyse the reduction of wax by suitable mathematical theory. The treatment of ultrasonic energy in wax reduction process involves experimentation and computation of some basic parameter which are explaining the basic mechanism of reduction of wax deposition. The variation of acoustic parameters, their excess values have been discussed in terms of molecular interactions present in the solvent mixture, which explains the physio- chemical behaviour of the crude oil at WAT due to complex formation. The treatment of crude oil with the optimum suitable blend makes it possible to reduce the wax percentage

Integrated nutrient management module to improve productivity and economics of short grain aromatic rice (Oryza sativa)- greengram (Vigna radiata) sequence

The present field study was carried out during 2017–18 and 2018–19 rainy (kharif) and winter (rabi) seasons in order to examine the impact caused by integrated nutrient management (INM) on the yield and quality of the short grain aromatic rice (Oryza sativa L.)-greengram (Vigna radiata L.) combination. Two years experimental data concluded that integration of 50% recommended dose (RD) as fertilizer + 50% RD of nitrogen via farm yield manure (FYM) resulted in considerably higher economic yield (3837.1 and 3917.7 kg/ha) of short grain aromatic rice cv. Nua Acharamati which were at par with 75% RD as fertilizer + green manuring of dhaincha (3438.5 and 3539.1 kg/ha). Pooled data revealed that, residual effect of 50% RD as fertilizer + 50% RD of nitrogen (FYM) and 75% RD as fertilizer + Rhizobium + PSB in greengram recorded the highest number of pods/plant (18.2), seeds/pod (11.3), pod length (9.3 cm), test weight (32.7 g), seed yield (925.7 kg/ha) and stover yield (2240.7 kg/ha) in greengram cv. IPM-02-03. Application of 50% RD as fertilizer + 50% RD of nitrogen (FYM) to aromatic rice recorded the highest hulling recovery (75.8 and 75.5%), milling recovery (68.0 and 68.3%), head rice recovery (60.0, 59.7%) and crude protein content (8.75 and 9.11%) during both of the years experiment being at par with application of 75% RD as fertilizer + green manuring. Economics of the system revealed the highest gross return, net return and B:C ratio by application of 50% RD as chemical fertilizer + 50% RD of nitrogen (FYM) in rice followed by 75% RD as chemical fertilizer + Rhizobium + PSB in greengram

Study of acoustic parameters of binary mixtures of a nonpolar liquid with polar liquid at different frequencies

The densities (.) and ultrasonic velocities (C) of binary mixture of diisopropyl ether (DIPE) and bromobenzene (BB) have been measured at different frequencies (1 MHz, 3 MHz and 5 MHz) over the entire range of mole fraction of diisopropyl ether (DIPE) at temperature 303 K. The intermolecular free length (Lf), isentropic compressibility (ß), acoustic impedance (Z) and excess values of isentropic compressibility (ßE) and acoustic impedance (ZE) have been computed using values of ultrasonic velocity (C) and density (.). The ultrasonic velocity, intermolecular free length are positive whereas the excess values of isentropic compressibility and acoustic impedance are negative over the entire composition range of DIPE which indicates presence of specific interactions between unlike molecules. The results are discussed in the light of intermolecular interactions occurring in the mixtures. Keywords : Binary mixture, ultrasonic velocity, isentropic compressibility, acoustic impedance, intermolecular free length.Study of acoustic parameters ofbinary mixtures of a non­polar liquid with polar liquid at different frequencies G Nath*, S Sahu and R Paikaray Department of Engg. Physics, Dhaneswar Rath Institute of Engg. and Management Studies (D.R.I.E.M.S.), Tangi, Cuttack-754 022, Orissa, India Post Graduate Department of Physics, Ravenshaw University, Cuttack-753 001, Orissa, India E-mail : [email protected] of Engg. Physics, Dhaneswar Rath Institute of Engg. and Management Studies (D.R.I.E.M.S.), Tangi, Cuttack-754 022, Orissa, India Post Graduate Department of Physics, Ravenshaw University, Cuttack-753 001, Orissa, Indi

Study of effect of ultrasonication on benzoylation of cellulose in synthesis of activated carbon for microwave absorbing material

567-571The efficiency of all microwave absorbing materials (MAM) /radar absorbing material (RAM) purely depends on their composition, particularly carbon and oxygen. Most of the biowaste being rich in cellulose contains carbon as the main component. The treatment of different biowaste like residues of agricultural products is a vital step before fabrication of biomaterial for different application. The present work describes the ultrasonic analysis of treatment of benzoyl chloride with aqueous cellulose. The variation of ultrasonic velocity and other acoustic parameters like compressibility and intermolecular free length with increasing concentration of benzoyl chloride suggests possible intermolecular interactions. The presences of such interactions have been well explained in terms of morphological changes in waste biomaterials like sugarcane bagasse. The presence of many reaction sites on the treated sugarcane bagasse increases its suitability for the synthesis of biomaterials. The SEM of treated sugarcane bagasse presents significant explanation for the absorption of incident microwave radiation on the prepared biomaterial

Effect of ultrasonication in treatment of crude oil

914-919The demand of petroleum oil has proven its importance in energy sector as well as in the streamlining the economic scenario of the country. In production sector of crude oil, the problem has been observed when the ambient temperature is lower than the wax appearance temperature (WAT), which results the oil become cool leading to deposition of wax. The present paper focuses effect of ultrasonic energy on crude oil sample to reduce the deposition of wax. The propagation of ultrasonic wave in waxy crude oil in presence of suitable blend makes it possible to proper analyse the reduction of wax by suitable mathematical theory. The treatment of ultrasonic energy in wax reduction process involves experimentation and computation of some basic parameter which are explaining the basic mechanism of reduction of wax deposition. The variation of acoustic parameters, their excess values have been discussed in terms of molecular interactions present in the solvent mixture, which explains the physio- chemical behaviour of the crude oil at WAT due to complex formation. The treatment of crude oil with the optimum suitable blend makes it possible to reduce the wax percentage

Recombination and Decay of Plasma Produced by Washer Stacked Plasma Gun inside a Curved Vacuum Chamber

This paper presents the recombination coefficient of the plasma blob is calculated by measuring the electron density ne of the order of 1018m-3 and time (~μs) to move a particular distance.A washer stacked plasma gun is designed to produce high density plasma blob which is moving with speed~104 m/s. As the blob moves radially outward the particle density as well as drift velocity of the blob decreases. Since both charged and neutral components are present in the blob, the recombination may play a dominant role for the blob motion. It has been observed that the recombination co-efficient α (~ 10 -12 m3s-1) is almost constant across radial distance from gun mouth and in that spatial length the electron-excited molecular collisional ionization is negligible, so two body recombination is dominant

Projection of Futuristic Climatic Scenario of Cuttack District of Odisha using CMIP5

The Changing climatic scenario is found as the most challenging issue to be faced by the farmers in future for attaining sustainable farm income. This study aimed to explore the projected climate change for Cuttack district of East and South Eastern Coastal plain agro-climatic zone of Odisha using four global climate change Representative Concentration Pathways (RCP) scenarios 2.6, 4.5, 6.0 and 8.5 for four future years 2030, 2050, 2070 and 2090. CMIP5 (Coupled Model Inter comparison Project Phase 5) was employed using bilinear interpolation for downscaling to generate these climate projections with included weather parameters i.e temperature, rainfall and solar radiation for the study area. The model results revealed that the RCP projections of climate change showed an increase in seasonal maximum temperature, minimum temperature and solar radiation and a decrease in the rainfall condition in future for Cuttack district of Odisha for the years 2030, 2050, 2070 and 2090 and there will be an maximum increase in seasonal maximum temperature by 2.56 o C and by 3.96 o C in seasonal minimum temperature in the year 2090 under RCP 8.5 scenario. Hence through the findings of the present investigation it is found that there is a need for farmers of Cuttack district of Odisha to follow necessary adaptation strategies in future to avoid the major risk caused to the agriculture production potential under the changing scenario of climate