fn Partíal Fulfillnent - MSpace

will be excreted as such in the faeces. part will undergo
proteol¡'sis during autodegradation of ihe micro_organi srns .
Ðegradation, as opposed to synthesis, will take over as lhe
micro-organisms move down the large intestine. This is
probably partly due to a decrease ín nutrients available
for the nicro-organisrns. The major end product of proteolysis
of bacterj-al protein is am¡nonia. ËLood draining the co1on,
especially that of the disral part, contains very high revels
of ar¡nonia (trichel , 1966).
The level of bacterial fermentation in the large
intestine has been shown to be affected by the nature of the
carbohydrate portj.on of the diet. i;iason and palmer (192¡ ) fe¿
a diet 'r,o rats that contained egg albumin as the protein
source (r4/" ) an¿ rice starch as the carbohyd:"ate source (soll).
Replacement of rice starch by cornstarch did not increase the
faecar nitrogen excreti-on but a significant i-ncrease was found
when rice starch was replaced by raw potato starch. The
authors suggested that raw potâto starc¡r was digested -,, o a
lesser extent in the small int,estine than corn or rice starch.
Therefore, more carbohydrate l:as available from potato starch
than fron rice or cornstarch to the flora of the large intestine
for fernentation of undigested exogeneous or endogeneous protein
residues. T'he increase in faecal nitrogen excretion due to
dietary inclusion of raw potato starch was associ_ated viith a
pararlel i-ncrease in diaminopi¡¡leli c acid (ÐApÀ) excretion.
20