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1
Content available Time and temperature dependent sorption behaviour of dimethoate pesticide in various Indian soils
100%
Rani S. , Sud D.
International Agrophysics
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2014
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tom 28
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nr 4
EN
Experiments were conducted to study the sorption behaviour of dimethoate in three Indian soils at different temperatures. A kinetic study showed that adsorption equilibrium was reached within 15 h at different initial levels of pesticide concentration. Applicability of the pseudo second order kinetic model suggested that the adsorption process was complex and several mechanisms were involved. The Freundlich model explained the adsorption behaviour adequately and the isotherms were of S-type. The adsorption process was found to be strongly affected by temperature. The Gibbs free energy change, ΔGº values (from -15.81 to -16.60 kJ mol-1) indicated that the process was spontaneous and exothermic in nature. The change in enthalpy of adsorption, ΔH° values (from -17.729 to -21.539 kJ mol-1) suggested that relatively weak H-bond forces were the main driving forces for adsorption. Desorption was found to be concentration- and temperature-depen- dent with higher desorption occurring at higher temperature and concentration levels. The results signify the importance of temperature in controlling the mobility of dimethoate in water bodies.
2
Content available Marketing costs and price spread for selected fruit crops in Haryana state: a stydy of selected districts
80%
Rani S. , Lal C. , Kait R.
Economic and Regional Studies
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2022
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tom 15
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nr 4
3
Content available Loan repayment behavior of beneficiary farmers in primary agricultural cooperative societies in Haryana (India)
80%
Singh S. , Singh A. , Rani S. , Rani M.
Economic and Regional Studies
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2024
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tom 17
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nr 2
4
Content available remote Enhancement of photovoltaic performance of quasi-solid state dye sensitized solar cell with dispersion of a hole conducting agent
80%
Rani S. , Shishodia P. K. , Mehra R. M.
Materials Science Poland
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2010
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tom Vol. 28, No. 1
281--294
EN
The presence of a hole conducting agent in a quasi-solid state dye sensitized solar cell (DSSC) may improve cell parameters. The paper reports on the photovoltaic properties of two types of cells, one containing a layer of CuI on a dye coated ZnO electrode (cell A) and the other with CuI dispersed in a gel electrolyte (cell B). The cell A generated a short circuit current density of 7.45 mAocm-2, an open-circuit voltage of 0.56 V, a fill factor of 0.54 and an overall power conversion efficiency of 2.26% under 100 mWocm-2 (air mass: 1.5). In cell B, an enhancement in its performance was observed. The cell showed 2.67% efficiency with a short circuit current density of 8.75 mAocm-2, an open-circuit voltage of 0.59 V and a fill factor of 0.52. The increase in the performance is attributed to the improvement in the hole transport in the electrolyte. The efficiency of cell B was further increased to 3.38% by introducing a compact layer of ZnO 106 nm thick.
5
Content available GA based optimal planning of VAR sources using Fast Voltage Stability Index method
80%
Bhattacharyya B. , Rani S. , Vais I. R. , Bharti P. I.
Archives of Electrical Engineering
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2016
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tom Vol. 65, nr 4
789--802
EN
This paper presents a novel approach for reactive power planning of a connected power network. Reactive power planning is nothing but the optimal usage of all reactive power sources i.e., transformer tap setting arrangements, reactive generations of generators and shunt VAR compensators installed at weak nodes. Shunt VAR compensator placement positions are determined by a FVSI (Fast Voltage Stability Index) method. Optimal setting of all reactive power reserves are determined by a GA (genetic algorithm) based optimization method. The effectiveness of the detection of the weak nodes by the FVSI method is validated by comparing the result with two other wellknown methods of weak node detection like Modal analysis and the L-index method. Finally, FVSI based allocation of VAR sources emerges as the most suitable method for reactive power planning.
6
Earthworms: ecofriendly environmental engineers
80%
Rani S. , Bansal N. , Shukla V.
Journal of Biology and Earth Sciences
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2013
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tom 03
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nr 1
7
Content available remote Result Analysis Suite: A Completely Automated Result Analysis Solution
70%
Sambya P. , Rustagi A. , Rani S. , Bhudhiraja C. , Sharma B.
Annals of Computer Science and Information Systems
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2018
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tom Vol. 14
121--123
EN
"What gets measured, gets managed". The present paper intends to describe a one stop solution to analyze the student result data collected from the University Website automatically using the web automation technology, organize it into an efficient fashion and make it available for all stakeholders in a beautiful and intuitive way, therefore, reducing the manual task to a bare minimum. The whole system is divided into three phases - Data Collection, Re-Organization and Presentation. An automation system has been developed for raw result data collection, re-organization of the collected data and applying efficient analysis algorithms on the data locally, and in the last phase, presenting the result information to the user in an intuitive manner so as to make it easy and quick to understand and interact. Keeping the user in mind, the last phase is the most crucial one. A set of highly efficient open-source graph rendering libraries has been employed to generate interactive result infographics which are portable and can be exported for external use.
8
Content available Meiotic studies in some members of Caryophyllaceae Juss. from the Western Himalayas
70%
Jeelani S. M. , Rani S. , Kumar S. , Kumari S. , Gupta R. C.
Acta Biologica Cracoviensia. Series Botanica
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2011
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tom 53
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nr 1
EN
The paper reports meiotic studies on 50 populations comprising 12 species belonging to 5 genera of Caryophyllaceae from the Western Himalayas. The chromosome numbers in Arenaria kashmirica (n=20), Silene conoidea (n=20), S. edgeworthii (n=12 and n=24), S. moorcroftiana (n=24), S. nepalensis (n=12), Stellaria media (n=13), S. monosperma (n=13) and S. semivestita (n=13) are reported for the first time. The chromosome numbers in Lychnis coronaria (n=12) and Silene vulgaris (n=24) are given for the first time from India, along with Gypsophilla ceratioides (n=15) from the Western Himalayas. The course of meiosis varies from normal to abnormal in different populations of Silene conoidea, S. edgeworthii, S. vulgaris, Stellaria media, S. monosperma and S. semivestita. The course of meiosis was abnormal in all studied populations of Lychnis coronaria. Abnormal microsporogenesis (cytomixis, chromosomal stickiness, unoriented bivalents, formation of laggards and bridges) led to reduced pollen fertility and differences in pollen grain size.
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