Jodhpur, India

Jai Narain Vyas University also known as University of Jodhpur is situated in Jodhpur city in the Indian state of Rajasthan. Established in 1962 it took over the four colleges of Jodhpur run by the state government. Accredited with "B" grade by the NAAC, this is the only residential university in the state of Rajasthan, catering mainly to the needs of students of western Rajasthan . Since this university is in the great Indian Thar Desert, its R&D activities are centered on the heritage, society and challenges of the region. This is the western-most university of the country and imparts education and conducts research in border areas neighboring Pakistan. Wikipedia.

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Saxena I.,Banasthali University | Shekhawat G.S.,Banasthali University | Shekhawat G.S.,Jai Narain Vyas University
Nitric Oxide - Biology and Chemistry | Year: 2013

Nitric oxide (NO) is recognized as a biological messenger in various tissues to regulate diverse range of physiological process including growth, development and response to abiotic and biotic factors. The NO emission from plants is known since the 1970s, and there is copious information on the multiple effects of exogenously applied NO on different physiological and biochemical processes of plants. Heavy metal toxicity is one of the major abiotic stresses leading to hazardous effects in plants and its toxicity is based on chemical and physical property. A common consequence of heavy metal toxicity is the uncontrolled and excessive accumulation of reactive oxygen species (ROS) which leads to peroxidation of lipids, oxidation of protein, inactivation of enzymes, DNA damage and/or interact with other vital constituents of plant cells. Recently, an increasing number of articles have reported the effects of exogenous NO on alleviating heavy metal toxicity in plants but knowledge of physiological mechanisms of NO in alleviating heavy metal toxicity is quite limited, and some results contradict one another. Therefore, to help clarify the roles of NO in heavy metal tolerance, it is important to review and discuss the recent advances on this area of research. NO can provoke both beneficial and harmful effects, which depend on the concentration and location of NO in the plant cells. NO alleviates the harmfulness of the ROS, and reacts with other target molecules, and regulates the expression of stress responsive genes under various stress conditions. This manuscript includes, the latest advances in understanding the effects of endogenous NO on heavy metal toxicity and the mechanisms and role of NO as an antioxidant as well as in protein nitration are highlighted. © 2013 Elsevier Inc. All rights reserved.

Bhimwal M.K.,Jai Narain Vyas University | Gangotri K.M.,Jai Narain Vyas University
Energy | Year: 2011

The comparative performance of photogalvanic cells has been studied for solar energy conversion and storage by using Methyl Orange, Rose Bengal, Toluidine Blue and Brilliant Cresyl Blue as different photosensitizers with d-Xylose as reductant and Sodium Lauryl Sulphate (NaLS) as surfactant in the different systems. The photogeneration of photopotential are 890.0, 885.0, 945.0 and 940.0 mV whereas the maximum photocurrent is 625.0, 575.0, 510.0 and 480.0 μA, respectively. The short circuit current or photocurrent at equilibrium is 480.0, 460.0, 430.0 and 440.0 μA, respectively. The observed conversion efficiencies for Methyl Orange, Rose Bengal, Toluidine Blue and Brilliant Cresyl Blue with d-Xylose and Sodium Lauryl Sulphate systems are 1.6245, 1.5261, 1.4323 and 1.1057%, respectively. The fill factors 0.3244, 0.3151, 0.3120, and 0.2408 are experimentally determined at the power point of the cell where the absolute value is 1.0. The photogalvanic cells so developed can work for 160.0, 145.0, 130.0 and 140.0 min in dark if it is irradiated for 180.0, 165.0, 135.0 and 150.0 min, respectively where the percentage of storage capacity of photogalvanic cells are found 87.87%-96.29%. All observed results are the higher among the reported results so far in the literature. © 2010 Elsevier Ltd.

Choudhary R.P.,Jai Narain Vyas University | Sheoran A.S.,Jai Narain Vyas University
Bioresource Technology | Year: 2011

The biodegradability and comparative effectiveness in treatment of acid mine drainage of ten locally available organic waste materials were examined. pH of AMD increased from 2.70 to 6.25, 7.10 and 7.50 with buffalo, cow and goat manures whereas cellulosic wastes increased the pH within the range of 4.83-5.32 in laboratory scale single substrate bioreactors. Significant reduction was observed in Eh, acidity and sulfate with manures in treated AMD. Maximum metal removal efficiency was 99.3%, 99.9%, 99.8%, 99.1%, 99.1%, and 73.8% for Fe, Cu, Zn, Ni, Co and Mn in maximum retention period of 10. days. The highest efficiency of metal removal was observed in bioreactors with manures as single substrate. The effectiveness of substrate depends on its biodegradation ability, the results with cellulosic waste indicates it may need more than 10. days to biodegrade. Biodegradability of organic waste was evaluated according to COD/. SO42- and C/N ratio and the ratios of 0.48-0.57 and 22.22-23.00 respectively were adequate parameters for activity of sulfate reducing bacteria and pollutant removal efficiency. © 2010 Elsevier Ltd.

Rai M.K.,Jai Narain Vyas University | Shekhawat N.S.,Jai Narain Vyas University
Plant Cell, Tissue and Organ Culture | Year: 2014

Fruits are one of the major sources of vitamins, essential nutrients, antioxidants and fibers in human diet. During the last two-three decades, genetic engineering methods based on the use of transgenes have been successfully adopted to improve fruit plants and focused mainly on enhanced tolerance to biotic and abiotic stresses, increased fruit yield, improved post harvest shelf life of fruit, reduced generation time and production of fruit with higher nutritional value. However, the development of transgenic fruit plants and their commercialization are hindered by many regulatory and social hurdles. Nowadays, new genetic engineering approaches i.e. cisgenesis or intragenesis receive increasing interest for genetic modification of plants. The absence of selectable marker gene in the final product and the introduced gene(s) derived from the same plant or plants sexually compatible with the target crop should increase consumer's acceptance. In this article, we attempt to summarize the recent progress achieved on the genetic engineering in fruit plants and their applications in crop improvement. Challenges and opportunities for the deployment of genetic engineering in crop improvement programs of fruit plants are also discussed. © 2013 Springer Science+Business Media Dordrecht.

Koli P.,Jai Narain Vyas University
Applied Energy | Year: 2014

Photogalvanic cells are photoelectrochemical devices involving ions as mobile charges moving in solution through diffusion process. These cells are capable of solar power generation at low cost with inherent storage capacity. This property of photogalvanic cell needs to be exploited as this technology is cleaner and promising for application in daily life. Therefore, a photogalvanic cell consisting of Fast Green FCF as photosensitizer, Fructose as reductant and NaOH as alkaline medium has been studied with observed value of maximum potential 1083. mV, maximum photocurrent 431. μA, short-circuit current 380. μA, power at power point 138.60. μW, efficiency 1.33%, and storage capacity (as half change time) 70. min. The observed results are higher and encouraging enough for ultimate aim of development of applicable and affordable photogalvanic cells in future. © 2013 Elsevier Ltd.

Genwa K.R.,Jai Narain Vyas University | Sagar C.P.,Jai Narain Vyas University
Energy Conversion and Management | Year: 2013

Solar generating photogalvanic cell collect the energy from the sun for conversion to electricity. In the present work photogalvanic effect was studied in photogalvanic cell consisting Tween 60-Biebrich scarlet-Ascorbic acid system. The photopotential, photocurrent and power generated in cell were 919.0 mV, 210.0 μA and 93.15 μW respectively. The conversion efficiency and storage capacity reported in this article as 0.8967% and 75.0 min. respectively. The effects of other parameters on the cell electrical output were investigated and a cell photoreaction mechanism for the generation of the photocurrent has also been proposed. The results also shown the efficiency along with storage performance of a photogalvanic cell based on Tween 60-Bibrich scarlet-Ascorbic acid system. © 2012 Elsevier Ltd. All rights reserved.

Photogalvanic cells (PG) are dye sensitized solution based solar power generation and storage devices. The photogalvanics of various synthetic dyes (single/mixed) and natural photo sensitizers (present in crude spinach extract) has been studied to obtain some new insights with the aim of finding relatively cheaper, cleaner and environmentally friendly photo sensitizers for further improvement in the electrical performance of PG cells. In this study, at illumination intensity 10.4 mW cm-2, the observed value of electrical output for single as well as mixed photo sensitizers is of the same order, and surprisingly very high with respect to earlier reported results. Therefore, it may be concluded that mixed photo sensitizers do not offer any significant advantage over single photo sensitizers. Therefore, I suggest a focus on single photo sensitizers, and more on natural photo sensitizers like chlorophyll present in crude spinach extract for cost-effective, eco-friendly and renewable cells. © 2014 The Royal Society of Chemistry.

Choudhary S.,Jai Narain Vyas University | Sengwa R.J.,Jai Narain Vyas University
Materials Chemistry and Physics | Year: 2013

The solid polymer electrolytes (SPEs) consisted of poly(ethylene oxide) (PEO) and lithium perchlorate (LiClO4) (PEO20-LiClO 4 and PEO8-LiClO4 electrolytes of composition stoichiometric ratios EO:Li+ = 20:1 and 8:1) have been prepared by various blending methods. The simple solution casting, solution-cast hot pressed, dry blended melt pressed, high intensity ultrasonic assisted, microwave irradiated, and both the ultrasonicated and microwave irradiated solution-cast followed by their remelt with hot pressed methods have been used for preparation of the SPEs films. The complex formation between etheric oxygen (EO) of PEO and cation (Li+) of LiClO4 is confirmed by relative changes in amorphous phase of these electrolytes which is investigated by X-ray diffraction measurements. It is found that the amount of amorphous phase of these SPEs is strongly influenced by their preparation methods and the salt concentration. The complex dielectric function, ac electric conductivity, electric modulus and impedance spectra of the electrolytes are studied over the frequency range of 20 Hz to 1 MHz by dielectric relaxation spectroscopy at ambient temperature. The dc ionic conductivity of PEO8-LiClO 4 electrolytes is found two to three orders of magnitude higher than that of the PEO20-LiClO4 electrolytes, which is significantly affected by their preparation methods. The cations coupled PEO chain segmental dynamics and its correlation with the ionic conductivity of these electrolytes has been explored by considering the values of relaxation times and dielectric relaxation strength. Results reveal that the ionic conductivity of PEO8-LiClO4 electrolytes can be tuned over two orders of magnitude by adopting different blending methods with a state-of-the-art engineering. © 2013 Elsevier B.V. All rights reserved.

Karwa R.,National School of Technology | Chitoshiya G.,Jai Narain Vyas University
Energy | Year: 2013

The paper presents results of an experimental study of thermo-hydraulic performance of a solar air heater with 60° v-down discrete rib roughness on the airflow side of the absorber plate along with that for a smooth duct air heater. The enhancement in the thermal efficiency due to the roughness on the absorber plate is found to be 12.5-20% depending on the airflow rate; higher enhancement is at the lower flow rate. The experimental data have been generated and utilized to validate a mathematical model, which can be utilized for design and prediction of performance of both smooth and roughened air heaters under different operating conditions. The results of a detailed thermo-hydraulic performance study of solar air heater with v-down discrete rib roughness using the mathematical model are also presented along with the effect of variation of various parameters on the performance. © 2013 Elsevier Ltd.

Gangotri K.M.,Jai Narain Vyas University | Indora V.,Jai Narain Vyas University
Solar Energy | Year: 2010

A mixture of two reductants (Dextrose and ethylenediamine tetraacetic acid) is used as a mixed reductants with Azur A as photosensitizer in the photogalvanic cell for solar energy conversion and storage with the aim to reduce the cost of construction for commercial viability. The photogeneration of photopotential and photocurrent were 778.0 mV and 55.0 μA, respectively, whereas maximum power of the cell was 42.79 μW. The observed power at power point of the cell was 10.87 μW and conversion efficiency was 0.1045%.The determined fill factor was 0.1942. The photogalvanic cell so developed can work for 115.0 min in dark where it was irradiated for 175.0 min. A mechanism for the photogeneration of electricity has also been proposed. © 2009 Elsevier Ltd. All rights reserved.

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