CHEMICAL ANALYSIS AND ASSESS OF THE NUTRITIONAL VALUE OF THE SEED OF TETRACAPIDIUM CONOPHORUM
CHEMICAL ANALYSIS AND ASSESS OF THE NUTRITIONAL VALUE OF THE SEED OF TETRACAPIDIUM CONOPHORUM
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Date
1989-07
Authors
M. S. Sallau,
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Abstract
The evaluation of the n u t r i t i o n a l value of the seeds of
Tetracarpidium conophorum (Mull, Arg,) Hutch & Dalza, which belongs
to the family of Euphorbiaceae, was carried out on four d i f f e r e nt
samples which include the raw, the cooked, the raw cotyledon and the
raw cotyledon-removed kernels of the seed.
The analysis shows that the raw seed kernel contains 35.49%
moisture ( a t 60 C), 40.30% moisture ( a t 105 C) both of which were on
fresh weight b a s i s . The dry raw sample contains 40.3% ash, 95.54%
t o t a l organic matter, 49.16% crude f a t , 20,62% crude p r o t e i n (Kjeldahls
method), 21.06% crude protein (Nesslers reagent method), 25.76% t o t al
carbohydrate, 5.78% soluble carbohydrate and a c a l o r i f i c value of
627.96 k i l o c a l o r i e s per 100g of dry sample. The amino acid composition
showed some of the e s s e n t i a l amino acids l i k e isoleucine, phenylalanine
plus t y r o s i n e and methionine to be above the values recommended by
FAO/WHO (1973). Tryptophan was destroyed on hydrolysis and threonine
was no detected.
The mineral elements determined in the raw seed sample were
Cd: 2..26 ugg- 1 , Ca: 0.725%c, Cu: 20.11 Ugg , Fe: 0.030%, Ng: 0.106%,
Mn: 0.010%, P: 0.86%, K: 1.6)4%, Nai 0.076% and Zn: 62.17 ugg-1
Cobalt was however not detected at the working concentration range employed.
Cooking was found to have led to the d e s t r u c t i o n of Valine and a
decrease in the concentration of other amino acids detected (with the
exception of aspartic acid). It has also decreased the crude f a t , the
soluble carbohydrate and the t o t a l c a l o r i f i c value in addition to a
decrease in the concentration of a number of e s s e n t i a l n u t r i e n t elements.
In p a r t i c u l a r , it decreased the concentrations of a number of
antinutritional elements "by increasing the potassium to sodium and
zinc to cadmium ratios from 21.58 to 33.78 and from 21.50 to 74.25
respectively.
The cotyledon sample has proven to have a higher concentration
of most of the nutrients than the other samples analysed. These
findings were discussed in terms of the value of the nut as food for
man and animals.
Description
A THESIS SUBMITTED IN PARTIAL FULFILLMENT
OF THE REQUIREMENTS FOR THE DEGREE OF
MASTER OF SCIENCE,
DEPARTMENT OF CHEMISTRY
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY
ZARIA
Keywords
CHEMICAL,, ANALYSIS,, ASSESS,, NUTRITIONAL,, VALUE,, SEED,, TETRACAPIDIUM,, CONOPHORUM