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Sudan University of Science and Technology (SUST) 2018

Characterization and Functional Properties of Azadirachta indica GUM From Sudan

Manssor, Mawahib Elmahi Moniem

Titre : Characterization and Functional Properties of Azadirachta indica GUM From Sudan

Auteur : Manssor, Mawahib Elmahi Moniem

Université de soutenance : Sudan University of Science and Technology (SUST)

Grade : Doctor of Philosophy (PhD) in Chemistry 2018

Résumé partiel
Forty five samples of the gum from Azdirachta indica gum were collected from three locations (15 samples from each location) Khartoum, White Nile and Northern Kordofan states. from Sudan, during seasons 2014-2016 ; Three composite samples were prepared form the fifteen samples of each location by mixing. Chemical and Physicochemical properties were studies amino acids profile, molecular weight and molecular weight distribution, rheological behavior and emulsification properties of Azadirachta indica gum. The results show the ranges for moisture content 11.2 - 12.2%, Ash content 3.0 – 3.30%, pH 4.2 – 4.8, Specific optical rotation -65.5 – -67, color Gardena (0.1 - 0.9), nitrogen content 4.8– 5.2%, hence protein% 30.2– 31.3%, tannin .04 –.010%, acid equivalent weight 1543 – 1708, total uronic acid% 11.3 – 12.5% and intrinsic viscosity 24 – 36 cm3g-1 .The calorific value was 4.3 kJ/mole. Acid hydrolysis revealed a sugar content Arabinose 14–22%, Galactose 17– 24%, Xylose 3 –4% and Rhammnose 2 –4%. The Cationic composition showed that Mg 57.1–38.9, Na 24.5–13.9, Ca12.6–9.6, K11.9–6.2, Cu 0.11–0.16, Zn 0.06–0.08, and P0.0.2–0.04mg/g. The amino acid results shows the presence of seventeen amino acids namely, Asparagine, Threnine, Serine, Glutamine, Proline, Glysine, Cysteine, Alanine, Valine, Methionine, Isoleucine, Leucine, Tyrosine, Phenylalanine, Histidine, Lysine, and Araginine. Number average molecular weight (Mn) was range in the 6.4×105 –12 ×105 g/mol . The molecular weight determined by gel permeation chromatography (GPC-MALLS) for the three location composite (Khartoum, White Nile and Northern Kordofan states) respectively.

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