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Clinical Pharmacology & Biopharmaceutics | ISSN : 2167-065X
Volume 7
September 18-19, 2018 | Amsterdam, Netherlands
6
th
European Biopharma Congress
Euro Biopharma 2018
Physicochemical characterization of the starch fromEthiopian potato
(Plectranthus edulis)
: a potential pharmaceutical
excipient
Anteneh Assefa
1
, Anteneh Belete
2
and
Tsige Gebre-Mariam
2
1
Wachemo University, Ethiopia
2
Addis Ababa University, Ethiopia
S
tarch from the tubers of Ethiopian potato
(Plectranthus edulis) (Fam. Lamiaceae)
has been isolated and examined for its chemical
composition, amylose content and physicochemical properties. The yield of starch was about 80.4% on dry weight basis. The proximate
composition of the starch on dry weight basis was found to be 0.14% ash, 0.21% lipid, 0.43% protein, and 99.22% starch. The amylose
content was 30.6%. Its true density and moisture content values were 1.47 g/ml and 11.2%, respectively. Scanning electron microscopy
(SEM) of the starch granules showed characteristic morphology that was by large oblong (elliptical) with some oval-shaped granules. The
starch has normal granule size distribution with a mean particle size of 36.20 µm. The DSC thermograms of P.
edulis
starch obtained from
starch-water mixtures (1:1), exhibited higher T
o
(69.2°C), T
p
(74.3°C) and T
e
(83.3°C) values than those of potato starch. X-ray diffraction
pattern of the starch was typical B-type with a distinctive maximum peak at 17.5o2θ. The starch possesses higher swelling power and
moisture sorption pattern, but lower solubility values than those of potato starch at all temperatures studied. Considering the high yield
value and some similar physico-chemical properties to those of potato starch, P.
edulis
(Ethiopian potato) can be explored as an alternative
source of starch for various applications.
ante2011@gmail.comClin Pharmacol Biopharm 2018, Volume:7
DOI: 10.4172/2167-065X-C1-029