This document discusses a study on cassava starch production in Colombia and sedimentation processes used to separate particles of different sizes in slurry. It found that particles greater than 10 micrometers were efficiently retained, while particles between 6.7-8.8 micrometers were discharged into local bodies of water, causing environmental problems. It also summarizes a study on the relationship between age of first sexual intercourse and sexual behavior in Spanish adolescents. The study found that those who had sex earlier than 15 engaged in further masturbation, intercourse and oral sex with more partners compared to other groups. Condom use was also significantly lower in the early debut group, suggesting early debut is associated with increased risk of infections and less condom use.

1. WEB QUEST
Part Of An
Abstract

3. Cassava Production Starch mainly In
The northern Region Of The Cauca a
Colombian Departament, In Small
Agricultural Industrias Know As
“Rollanderías”.

4. Evaluate The Sedimentation Process
Performed In Rectangular Channels
(0.3m High; 0.4m Wide; 165m Long)
Which Are generally Used In The
Region.

5. Two Main Components Were Evaluated:
• Determination Of The Change In The
Concentration Of The Slurry Zone,
Entering The Settling Zone.
• Determination Of The Particle Size
Distribution In The Settling Zone.

6. Slurry Concentration During The Strainer Operation:
Between 0,1 to 6%.
Settling Process Variation During The Process:
It Varied Between 0,82 to 1.44 L/S.
With A Predominance Of Laminar Flow And A
Hydraulic Retention Time Greater Than 150 Mins.

7. In The First 104m Of The Channels, Particles
Greater Than 10 μm in size were efficiently
retained, particles between 6.7 to 8.8 μm were
not retained and were discharged into local
bodies of water, generating a great
environmental problem.

9. In Spain young people have their first sexual
intercourse at an earlier age than in other countries;
however, little is known about the relationship between
age of sexual debut and sexual behavior in this
population.

10. 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).

11. 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).

12. The early sexual debut group reported further mutual
masturbation, vaginal intercourse and oral sex with a
higher number of sexual partners 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.
Sexual debut before 15 years old was associated with
increased risk of sexual infections, deficit in condom
use and increased sexual exposure.

13. The findings of this study suggest that the age of
sexual debut has implications for the sexual
health in young people.