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Theses

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2000 - 2009152010 - 201810
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Subject: Agricultural Chemicals × End date: 2019 × Thesis Type: Ph.D ×
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Now showing 1 - 9 of 25
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    ThesisItemOpen Access
    Synthesis of potent herbicidal organic compounds using ionic liquid and heterogeneous catalytic systems
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-01) Verma, Shivani; Kasana, Virendra
    Synthesis of five series of compounds namely _-phosphonomalonates using tetrabutylammonium bromide (TBAB) catalyst, naphthopyrans using novel nano-SiO2@Si(CH2)3@[tetrabutylammonium][valinate] catalyst, octahydroquinazolinone-1,3-dicarbaldehydes using novel tetrabutylammonium prolinate catalyst, small organic acid ionic liquids and cinnamic acid ionic liquids by acid-base neutralization method were carried out and screened for their herbicidal activity against Raphanus sativus (raddish) seeds at different concentrations (0.005M, 0.01M and 0.02M). Mild reaction conditions was applied for synthesis of _-phosphonomalonate, naphthopyran and octahydroquinazolinone-1,3-dicarbaldehyde derivatives affording these compounds in good to excellent yields. All the synthesized derivatives were docked with acetohydroxy acid synthase (AHAS) protein available on RSPDB data bank via molecular docking studies. The prepared catalyst was confirmed by 1HNMR, FT-IR, SEM, TEM and XRD techniques. The structure of compounds was elucidated using FT-IR, 1HNMR, 13CNMR and HR-MS spectral techniques.
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    ThesisItemOpen Access
    Equilibrium modeling and kinetic studies on the biosorption of Chromium (III) from synthetic waste water using Cupressus torulosa and Taxus baccata”
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-08) Verma, Anil; Viveka Nand
    In recent times, Heavy metals in general and chromium in particular has received a great deal of attention because of their toxicity. Studies were undertaken to examine the biosorptive ability of Gymnosperm plant species, Cupressus torulosa, and baccata, , collected from high altitude of Uttrakhand hills, to remove the Chromium (III) metal ions from aqueous solution. Batch mode experiments were conducted at cold and hot temperatures (25˚±5˚C and 40˚±5˚C) to study the effects of initial Cr (III) metal ion concentrations, pH, time and amount of biomass. Thus a removal of chromium is essential from the environment by cheap and ecofriendly process. The maximum percentage removal (%removal) and biosorption capacity (Qe value) were recorded at equilibrium conditions. The maximum removal of Cr (III), at cold and hot temperature condition by by C. torulosa and T. baccata, leaves were 97.83 and 93.66, 97.83 and 93.66 while by barks were 90.53 and 93.66% , 90.33 and 93.23% respectively. Langmuir, Freundlich and Temkin adsorption isotherm models were used to explain adsorption phenomenon of Cr (III) removal. Equilibrium data agreed well for biosorption of Cr (III). The kinetic data have been analyzed using Pseudo first order, Pseudo-second order and Elovich kinetic models. The experimental data fitted very well the Pseudo second order and Elovich kinetic models. The FT-IR spectra of dried unloaded and Cr-loaded plants biomass were obtained to understand the nature of possible interactions between the chromium metal ions and the functional groups of biosorbents. The FT-IR analysis revealed that the main functional groups involved in biosorption were carboxyl, carbonyl, amino, alcoholic and phenol. Significant morphological changes were observed using SEM analysis, which support the binding of metal with leaves and bark surfaces. Thus, it can be concluded that gymnosperms can be utilized as cost-effective and environment friendly alternative over commercial methods of treatment for removal of toxic metals and contaminants of water because these plants consists high metal binding properties at different environmental conditions.
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    ThesisItemOpen Access
    Chemical fractions and desorption of phosphorus and zinc in a fertilized mollisol
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2006) Kavidayal, Chandra Shekhar; Bali Ram
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    ThesisItemOpen Access
    Persistence And Trapping Efficiency Of Pheromone Of Helicoverpa Armigera (Hubner)
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2003) Dixil, Sonal; Kanaujia, Sudha
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    ThesisItemOpen Access
    Desorption Pattern And Efficacy Of Different Pheromonal Blends Of Helicoverpa Armigera (Hubner) Under Field Conditions
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2003) Gupta, Shweta; Kanaujia, Sudha
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    ThesisItemOpen Access
    Effect of some state variables on adsorption-desorptioon of sulfosulfuron in different soils
    (G.B.Pant University Of Agriculture And Technology Pantnagar : Uttaranchal, 2005) Awasthi, Priyanka; Bali Ram
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    ThesisItemOpen Access
    Phytochemical analysis and biological activity of Trichilia connaroides Wight and Arn. (meliaceae) and Ajuga sp. (lamiaceae)
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2006) Agarwal, Garima; Pant, A. K
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    ThesisItemOpen Access
    Phytochemical Examinations And Biocidal Activity Of Some Plant Species Of Family Lamiaceae
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2002) Tandon, Shishir; Pant, A. K.
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    ThesisItemOpen Access
    Phytochemical Evaluation Of In Situ And In Vitro Propagated Plants - Alpinia Calcarata Rosc. And Valerlana Wallichil Dc
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2004) Pandey, Siddharth; Pant, A K