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    ABSTRACT: The aim of this work is the production of Parthenin toxin (sesquiterpene lactone) free vermicompost from Parthenium hysterophorus L. Five different concentration of P. hysterophorus and cow dung mixtures were vermicomposted using Eudrilus eugeniae. Parthenium mediated vermicompost showed an increase in plant nutrition, but decrease in organic carbon and phenol contents when it was compared to initial feed mixtures. The 30-35% of organic carbon and 32-48% of phenol contents were reduced during vermicomposting, which was achieved after 45 days of earthworm's activity. FT-IR spectra revealed the absence of Parthenin (sesquiterpene lactone) and phenols in vermicompost which was obtained at high concentration of cow dung. Earthworm's biomass gain was in low level in high concentration of P. hysterophorus (without cow dung). The results indicated that Parthenin toxin and phenols can be eradicated via vermicomposting if P. hysterophorus is mixed with appropriate quantity of cow dung.
    No preview · Article · Sep 2013 · Journal of hazardous materials
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    ABSTRACT: Fourier transform infrared spectroscopy (FT-IR) and Gas chromatography-mass spectroscopy have been carried out to investigate the chemical composition of Parthenium mediated vermicompost. Four different concentrations of Parthenium and cow dung mixtures were vermicomposted using the earthworms (Eudrilus eugeniae). FT-IR spectra reveal the absence of Parthenin toxin (sesquiterpene lactone) and phenols in vermicompost which was obtained from high concentration of cow dung mixed treatments. GC-MS analysis shows no phenolic compounds and predominant level of intermediate metabolites such as 4,8,12,16-Tetramethylheptadecan-4-olide (7.61%), 2-Pentadecanone, 6,10,14-trimethyl- (5.29%) and Methyl 16-methyl-heptadecanoate (4.69%) during the vermicomposting process. Spectral results indicated that Parthenin toxin and phenols can be eradicated via vermicomposting if mixed with appropriate quantity of cow dung.
    No preview · Article · Aug 2013 · Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy
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    ABSTRACT: The study reports the synthesis and characterization of zinc oxide nanoparticles from weed plant by a novel method. The aim of this work is to synthesize zinc oxide nanoparticles from Parthenium hysterophorus L. by inexpensive, ecofriendly and simple method. Highly stable, spherical and hexagonal zinc oxide nanoparticles were synthesized by using different concentrations of 50% and 25% parthenium leaf extracts. Both the concentrations of the leaf extract act as reducing and capping agent for conversion of nanoparticles. Formation of zinc oxide nanoparticles have been confirmed by UV-Vis absorption spectroscopy, X-ray diffraction (XRD), Fourier trans-form infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis with energy dispersive X-ray analysis (EDX). SEM, TEM and EDX analysis reveals that spherical and hexagonal zinc oxide nanoparticle sizes were 27±5nm and 84±2nm respectively and chemical composition of zinc oxide were present. We synthesized different sized zinc oxide nanoparticles and explored the size-dependent antifungal activity against plant fungal pathogens. Highest zone of inhibition was observed in 25μg/ml of 27±5nm size zinc oxide nanoparticles against Aspergillus flavus and Aspergillus niger. Parthenium mediated zinc oxide nanoparticles were synthesized and proved to be good antifungal agents and environment friendly.
    No preview · Article · Apr 2013 · Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy
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