Synthesis and application of biopolymer hydrogels for seed germination in Calendula

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dc.contributor.advisorRamandeep Kaur
dc.contributor.authorSharma, Rupali
dc.date.accessioned2022-11-11T15:22:31Z
dc.date.available2022-11-11T15:22:31Z
dc.date.issued2021
dc.description.abstractRice straw is renewable, non-edible, cost effective and abundantly available feedstock, burning of which leads to emission of hazardous gases, therefore its utilisation is important to reduce extensive atmospheric pollution. The percent composition of rice straw was determined by detergent system method and was found to contain 20.00, 41.00, 24.00, 9.00 and 6.00% extractives, cellulose, hemicellulose, lignin and acid-insoluble ash (silica), respectively. Lignin was extracted by using the dilute acid pretreatment method of rice straw, in which rice straw was treated with 1% H₂SO₄ followed by its alkaline hydrolysis. Lignin was structurally characterized by FT-IR, ¹H and ¹³C NMR spectra. Lignin hydrogels were synthesized using lignin as raw material, poly vinyl alcohol as a matrix template and epichlorohydrin as a crosslinker followed by their characterization using FT-IR and SEM analysis. Different concentrations of lignin hydrogels (0.2%, 0.5%, 0.8% and 1%) were synthesized out of which 0.5% lignin hydrogels proved to be the most efficient due to their high swelling ratio i.e. 130.34 and high reswelling capacity. The dye adsorption capacity of lignin hydrogels came out to be more than that of neat PVA hydrogels. This was followed by evaluation of lignin hydrogels as culture media for seed germination of Calendula. Further, root length, shoot length, root:shoot length, seed vigour index, germination percentage and germination index were noted. It was concluded that 0.5% and 0.8% lignin hydrogels have proved to be efficient as culture media for seed germination of flowering plant Calendula.en_US
dc.identifier.citationSharma, Rupali (2021) Synthesis and application of biopolymer hydrogels for seed germination in Calendula (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810189804
dc.keywordsRice straw, lignin, hydrogels poly vinyl alcohol, epichlorohydrin, swelling ratio, seed germination and Calendulaen_US
dc.language.isoEnglishen_US
dc.pages63en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemSynthesis and application of biopolymer hydrogels for seed germination in Calendulaen_US
dc.subChemistryen_US
dc.themeSynthesis and application of biopolymer hydrogels for seed germination in Calendulaen_US
dc.these.typeM.Scen_US
dc.titleSynthesis and application of biopolymer hydrogels for seed germination in Calendulaen_US
dc.typeThesisen_US
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