1. The document discusses the settling process of cassava starch slurry in channels used by small agricultural industries called "rallanderías" in Colombia. 2. It evaluates the sedimentation process in rectangular channels that are commonly used, which are 0.3m high, 0.4m wide and 165m long. 3. Two main components were evaluated: the change in concentration of the slurry and the particle size distribution within the settling zone.

1. PARTS OF THE ABSTRACT
ANDRÉS FELIPE LOZADA CHINCHILLA
LIC: MARINA VIANA
INSTITUCIÓN EDUCATIVA NACIONAL
(AGUSTÍN CODAZZI)
INGLES
2014

4. 1. 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.

5. 2. 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.

6. 3. 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.

7. 4. 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.

8. 5. 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. 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.

11. 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).

12. 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).

13. 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.

14. 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.