Afficher la notice abrégée

dc.creatorLiyanage, Sumedha
dc.date.accessioned2022-04-06T16:57:20Z
dc.date.available2022-04-06T16:57:20Z
dc.date.created2013-12
dc.date.issued2013-12
dc.date.submittedDecember 2013
dc.identifier.urihttps://hdl.handle.net/2346/88999
dc.description.abstractGuar is becoming a highly valuable crop for West Texas due to its drought tolerance and potential use in hydraulic fracturing in shale gas and oil harvesting. Guar gum is chemically known as galactomannan, a heteropolysaccharide of galactose and mannose. Galactomannan is concentrated in the endosperm of the guar seed and is a storage polysaccharide which reserves energy for seed germination. It is mainly used in hydraulic fracturing, paper, textile, pharmaceutical and food industries. Full characterization of guar gum (Galactomannan) using different analytical tools is very important to understand the chemistry of the gum to optimize the industrial applications. However, limited number of studies has been conducted to characterize the gum extracted from currently available guar germplasm. Therefore, galactomannan extracted from two leading guar cultivars in West Texas was characterized using different analytical tools to elucidate physical and chemical differences. Pure guar galactomannan and food grade guar gum were also used as reference materials for the characterization. Extraction of the gum from guar seeds is critical because impurities in the gum have great impact on the behavior of guar solutions. Therefore, gum was extracted with minimal contamination with continuous sample assessment using Fourier Transform Infrared Spectroscopy (FTIR) to determine the level of contamination. Then, the gum was characterized by High Performance Liquid Chromatography (HPLC), Thermogravimetric Analysis (TGA), X-Ray Diffractometer (XRD) and FTIR to determine mannose and galactose contents, thermal stability, level of crystallinity and chemical composition of the gum respectively. Scanning Electron Microscope (SEM) was employed to visualize the morphology of guar seeds.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.subjectGuar gum
dc.subjectGalactomannan
dc.titleChemical and physical characterization of guar galactomannan extracted from guar seeds
dc.typeThesis
dc.date.updated2022-04-06T16:57:21Z
dc.type.materialtext
thesis.degree.nameMaster of Science
thesis.degree.levelMasters
thesis.degree.disciplineCrop Science
thesis.degree.grantorTexas Tech University
thesis.degree.departmentPlant and Soil Science
dc.contributor.committeeMemberHequet, Eric
dc.contributor.committeeMemberAuld, Dick L.
dc.contributor.committeeMemberWilliams, Ryan
dc.contributor.committeeChairAbidi, Noureddine
dc.rights.availabilityAccess is not restricted.


Fichier(s) constituant ce document

Thumbnail

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée