title: Structural, thermal and rheological characterization of modified Dalbergia sissoo gum--A medicinal gum.
abstract: Dalbergia sissoo gum was purified by ethanol precipitation. The purified gum was modified and hydrolyzed. Gum was modified by performing polyacrylamide grafting and carboxymethylation methods. The hydrolysis was carried out by using mannanase, barium hydroxide and trifluoroacetic acid. The modified and hydrolyzed gums were characterized using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The decrease in viscosity was studied by performing the flow test. The modified and hydrolyzed gums were thermally stable as compared to crude gum. There was increase in crystallinity after modification and hydrolysis, determined through XRD. FTIR analysis exhibits no major transformation of functional group, only there was change in the intensity of transmittance. It is concluded that the modified and hydrolyzed gum can be used for pharmaceutical and food industry.
authors.affiliation: Department of Biochemistry, Bahauddin Zakariya University, Multan, Pakistan; Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan.
authors.forename: Hira
authors.initials: H
authors.lastname: Munir
authors.affiliation: Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Shahid
authors.affiliation: Department of Chemistry, Government College University, Faisalabad, Pakistan.
authors.forename: Fozia
authors.initials: F
authors.lastname: Anjum
authors.affiliation: Department of Dairy & Food Technology, Mansinhbhai Institute of Dairy & Food Technology, Mehsana 384002, India. Electronic address: dsmudgil@yahoo.com.
authors.forename: Deepak
authors.initials: D
authors.lastname: Mudgil
mesh_terms: D002152:Calorimetry, Differential Scanning; D035782:Dalbergia / Q000737:chemistry*; D006868:Hydrolysis; D015394:Molecular Structure; D053149:Plant Gums / Q000737:chemistry*; D012212:Rheology; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014783:Viscosity; D014961:X-Ray Diffraction
chemical_list: D053149:Plant Gums
keywords: DSC; Dalbergia sissoo; FTIR; Gum; Hydrolysis; TGA; XRD