College aantekeningen
food additives
- Vak
- Instelling
- Boek
Lecture notes study book Understanding Nutrition of Eleanor Noss Whitney, Sharon Rady Rolfes - ISBN: 9781305537620 (nutrient content)
[Meer zien]Voorbeeld 2 van de 9 pagina's
Voorbeeld 2 van de 9 pagina's
In winkelwagen
In winkelwagen
Gekoppeld boek
Titel boek:
Auteur(s):
- Uitgave:
- ISBN:
- Druk:
Verkoper
Volgen
cholukhozoamahle99
Ontvangen beoordelingen
Voorbeeld van de inhoud
MODULE 6: VARIABLE AFFECTING THE NUTRIENT CONTENT OF FOODCOURSE OUTLINE
6.1 Effects of agricultural practices and technology
6.2 Genetics and growing conditions
6.3 Industrial contaminations
6.4 Toxic metals
6.5 Hormones and antibiotics in animal productions
6.6 Effects of processing on the nutrient content of food
COURSE OUTCOME
The student should be able to have an insight into the knowledge of the agricultural,
processing and technological factors which influence the nutrient content
1
, Genetics and growing conditions
Food futurists who gaze ahead see a world with a growing population which substantially
increases the requirements for food, while less land is available for use to produce the food.
Fewer people are willing to undertake food production. Food will be easy to grow and be able
to be produced in abundance. Many are hopeful that new technology will increase more crop
yields and reduce waste. The production of food must support growers economically and must
have an as little environmental impact as possible.
The world is witnessing the revolution of new technology in food science and agriculture. Some
people feel uneasy about such rapid changes and its possible risk. The controversy focuses on
two major food technology issues that hold vast potential for changing the food supply, i.e.
genetic engineering and radiation.
Genetic and growing conditions
For centuries farmers have been adaptation the genetic makeup of their animals and plants.
Season after season they have selectively bred plants or animals’ possession desirable traits in
the hope of obtaining offspring that reliable display these traits. Today’s lush. Healthy
vegetable crops and animals demonstrate the results. This process is termed selective breeding.
Among successes of selective breeding are mealies. Its large ears with full sweet kernels and
high yield bear little resemblance to the original wild native mealies with its sparse two or three
kernels per stalk. Breeders have even trained mealies to stay sweet, i.e. sweet corn by breeding
to an enzyme that naturally turns sugar to starch within days after harvest. Selective breeding
works slowly (can take centuries) and sometimes imprecisely (as a result of genetic drift,
mutation, selection etc.)
Genetic engineering (GE) could accomplish the same results in a few years. GE is defined as
the direct intentional manipulating of the genetic material of living things to obtain the
same desirable trait not present in the original organism. Also called recombined DNA
technology.
Genes are passed from one generation to the next to determine all inherited characteristics.
Genes are made from DNA, most of which is packaged into chromosomes within the nucleus
of the cell. Some genes are also found outside the nucleus in the mitochondria (release energy
for cellular activities) and in the chloroplast (site of photosynthesis) in plant cells.
Genes determine the structure of all part of a specific protein. Also encoded in the DNA are
instructions to regulate the protein production. DNA has an identical structure in all living
things. Because the genetic code is universal. Possibility is that they can be transferred between
complete different species. The process of transferring, removing or altering genetic
information by modification of the DNA is called Genetic engineering (GE) or genetic
modification (GM).
2
Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:
Bewezen kwaliteit door reviews
Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!
In een paar klikken geregeld
Geen gedoe — betaal gewoon eenmalig met iDeal, creditcard of je Stuvia-tegoed en je bent klaar. Geen abonnement nodig.
Direct to-the-point
Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper cholukhozoamahle99. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor $5.45. Je zit daarna nergens aan vast.
Is Stuvia te vertrouwen?
4,6 sterren op Google & Trustpilot (+1000 reviews)
Afgelopen 30 dagen zijn er 65646 samenvattingen verkocht
Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen
Laatst bekeken door jou
Samenvatting ·
CHAPTER 4
Study guide ·
Intensiewe Vorm
Samenvatting ·
Strategy
Samenvatting ·
Rechtsfilosofie
Overig ·
Leadership ATI.
