5. The production of cassava
starch in Colombia comes
mainly from the northern region
of the Cauca Departament in
small agricultural industries
know as “rallanderías”, in which
the settling of the slurry occurs
in channels.
6. Due to the fact that the settling
process determines the capacity of
the starch industry, it is important to
evaluate the sedimentation process
performed in rectangular channels
(0.3m high; o.4m wide; 165m long),
which are generally used in the
region.
7. Two main components were
evaluated: determination of the
change in the concentration of the
slurry entering the settling zone
and determination of the particle
size distribution in the settling
zone.
8. During the settling process,
the flow varied between 0.82 to
1.44 L/S with a predominance
of laminar flow and a hydraulic,
retention time greater than 150
minutes.
9. In the first 104m of the channel,
particles greater than 10μm in size
were efficiently retained; particles
between 6.7 to 8.8μm were not
retained and were discharged into
local bodies of water, generating
environmental problems.
10.
11. In Spain young people have their
first sexual intercourse at an
earlier age than in other countries;
however, little is know about the
relationship between age of
sexual debut and sexual behavior
in this population.
12. Sexual practices and methods of
protection are analyzed
depending on the age of sexual
debut among Spanish
adolescents who are sexually
experienced (N-351). The mean
age was 15,9 years (SD=.75,
range: 14-18).
13. Three groups were formed
according to the age of sexual
debut reported: Early sexual debut
(Earlier than 15 years), average
(15 years) and late (Later than 15
years).
14. The early sexual debut group reported
further mutual masturbation, vaginal
intercourse and oral sex with a higher
number of sexual portners than the
rest. Condom use at first intercourse,
percentage of use and Consistent-
Condom use was significantly lower in
the early sexual debut group compared
to the others.
15. Sexual debut before 15 years old was
assocrated with increased risk of
sexual infections, deficit in condom
use and iincreased sexual exposure.
The findings of this study suggest that
the age of sexual debut has
implications for the sexual health in
young people.
