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Utilization of Fruit Processing Wastes in the Diet of Labeo rohita Fingerling
Deka, Abani,Sahu, N.P.,Jain, K.K. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.11
A feeding trial was conducted for 60 days to study the utilization of fruits processing wastes as feed ingredient in the diet of Labeo rohita fingerlings. One hundred and sixty fingerlings (av. body weight, $1.65g{\pm}0.03$) were equally distributed in four experimental groups having 4 replicates each. Four different experimental diets were prepared by replacing wheat flour and rice bran with either orange (T2) (Cirtus qurantium), pineapple (T3) (Ananas spp. and Pseudananas spp.) or sweet lime (T4) (Citrus sinensis) wastes to the basal diet along with the control (T1, without any fruit wastes) keeping the CP level at around 40%. The water quality parameters like DO, $CO_2$, pH, total alkalinity, total hardness, ammonia and water temperature were recorded within the optimum range. The diet containing 25% pineapple wastes (T3) showed significantly higher growth in terms of SGR (1.50), FCR (2.09) and PER (1.19) than the other groups. However, growth of T4 and T2 groups were not significantly different than the control group (T1). Protease activity (17.17 unit/mg protein), protein digestibility (91.57%) and carbohydrate digestibility (41.62%) were not significantly different among the different groups. Survival of the fingerlings were not significantly different among the experimental groups. It concludes that waste of orange, pineapple and sweet lime can be used at 25% level as a substitute of wheat flour and rice bran in the diet of Labeo rohita.
Role of ion-acoustic wave energy in enhanced X-mode radiation phenomena in magnetospheric plasma
Saikia Banashree,Deka P. N. 한국물리학회 2024 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.84 No.3
Most of the energy in magnetospheric plasma is available in the form of low-frequency turbulence. In this paper, we have explored the possibility of pumping such low-frequency turbulence wave energy into high-frequency X-mode in the magnetosphere. We have considered the wave energy up-conversion process through the nonlinear wave-particle interaction of the ion-acoustic wave and the X-mode wave. In this model of wave energy up-conversion, we have considered a particle distribution of modifed Maxwellian with the involvement of a gradient parameter associated with the spatial gradient and temperature gradient of magnetospheric plasma. When considering the Vlasov–Maxwell system of equations to describe the wave interaction process, we have evaluated the fuctuating parts of the particle distribution function due to the ion-acoustic wave feld for the modulated feld and the nonlinear fuctuating parts of the distribution function due to X-mode. The nonlinear dispersion relation for X-mode enables us to estimate the growth of X-mode at the expense of the ion-acoustic wave energy of the magnetospheric plasma. We have also demonstrated that how this growth process is infuenced by gradient parameters associated with this system.
Behaviour of dust ion-acoustic solitary wave structures in a magnetised superthermal plasma
Ozah Jintu,Deka P. N. 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.12
The purpose of this study is to investigate the dust ion-acoustic soliton (DIAS) structures in a magnetised plasma with superthermal components in the presence of trapped electrons, positive (negative) ions and opposite charged dust particles. Using the well-known reductive perturbation technique and a hydrodynamic model for ions, we have constructed both the Schamel Zakharov–Kuznetsov (S-ZK) and Schamel Korteweg–de Vries (S-KdV) equations. An energy integral equation involving Sagdeev’s pseudopotential is derived and the fundamental properties of small-amplitude solitary waves are investigated. The implications of relevant plasma parameters, such as the spectral index parameter, trapped electron parameter, positive (negative) dust number density and ion cyclotron frequency, on the profle of the Sagdeev’s pseudopotential and the corresponding solitary waves are shown graphically.
Dehingia Hirak Jyoti,Deka P. N. 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.5
In this paper, we have presented a study on the propagation of nonlinear Dust-Acoustic Solitary Waves (DASWs) in inhomogeneous magnetized dusty plasma. In this model, we have considered a system of collisional, magnetized dusty plasma, consisting of nonextensive electrons, Boltzmannean ions, and negatively charged dust grains in the plasma. We have also considered variable number density for the diferent dusty plasma components. Using the Reductive Perturbation Theory (RPT), the modifed Zakharov-Kuznetsov (m-ZK) equation is derived with the help of governing equations in the plasma. The solutions of m-ZK equation indicate the propagation of nonlinear DASWs. This study also shows how the inhomogeneity parameters and nonextensive electrons impact on the phase velocity, width and amplitude of the soliton propagating in inhomogeneous plasmas. In this investigation, we have also predicted some relations among the amplitude, width, and phase velocity of the DASWs which is relevant to Earth’s magnetospheric plasma environment for the system.