Raman and infrared spectra of starch samples of sweet potato and cassava

Abstract

Al~tnu:t. Raman and infrared spectra of starch samples from sweet potato and different varieties of cassava (tapioca) are reported. Three regions of the spectra, the OH stretching region (3560-3000 cra-~), the CH stretching region (3000-2800 cm-t) and the finger print region (1600-200cm-1), have been studied. The results are discussed in relation to the hydrogen bonding and the properties of starch samples.

Biodegradable starch-based films containing saturated fatty acids: thermal, infrared and raman spectroscopic characterization

“…The band at 480 cm -1 describes the degree of polymerization in polysaccharides and is one of the dominating and important skeletal vibration modes of the pyranose ring [20,21] . The Raman band at 1260 cm -1 attributed to CH 2 OH, which indicates the V-form amylase deformation [22,23] . The vibrations from the glycosidic linkage observed in the region of 920-960 cm -1 , in our study the band at 940 cm -1 [21,24] .…”

Formulation and investigation of crushed puffed rice-chitosan-HPMC based polymeric blends as carrier for sustained stomach specific drug delivery of piroxicam using 3(2) Taguchi mathematical design studies

“…Sharp and broad peak intensity at 2927.16 cm -1 represents to the CH2 deformation having medium absorption peak. Broad and sharp peak intensity at 1649.58 cm -1 represents to the alkene (C=C) having medium peak intensity and also represents the tightly bound water adsorbed in the region of starch which was reported by (Santha et al, 1990;Wilson et al, 1991). Absorption peak intensity at 1412.57 cm -1 corresponds the C-O-O stretching and CH2 bending.…”

“…These are very crispy in nature and are prepared by air frying preboiled dehusked rice in clay ovens at very high temperature. Chemically, it contains carbohydrates as a major constituent (Kizil et al, 2003;Huang et al, 2007;Santha et al, 1990). Since these are crispy in nature, they can be crushed into fine low-density powder which is not easily wetted by water and can float over the surface for a prolonged period of time.…”

Crushed Puffed Rice-HPMC-Chitosan based Single-Unit Hydro-dynamically Balanced System for the Sustained Stomach Specific Delivery of Metoprolol Succinate

“…A FTIR spectrum below 800 cm -1 represents complex vibrational modes due to the skeletal mode vibrations of the pyranose ring in the glucose ring (Kizil et al, 2002;Huang et al, 2007). All these peaks are present in the parent peaks of starch as investigated by authors (Kizil et al, 2002;Huang et al, 2007;Santha et al, 1990); since we are using CPR as a novel biodegradable polymer for drug delivery technology this puffed rice also contains starch as its main constituent. From this FTIR we can say that the basic constituent present in CPR is starch on the preliminary basis which is used as buoyancy imparting agent.…”

“…Sharp and broad peak intensity at 2927.16 cm -1 corresponds to the CH 2 deformation having medium absorption intensity. Broad and sharp peak intensity at 1649.58 cm -1 corresponds to the alkene (C=C) having medium peak intensity which represents the tightly bound water adsorbed in the region of starch (Santha et al, 1990;Wilson et al, 1991). The peak intensity at 1412.57 cm -1 represents the C-O-O stretch, CH2 bending.…”