NANO TECHNOLOGY AND GM FOODS Lesson 25

Starter Activity

How big do you think a nanometre is?

ANSWER - one millionth of a millimetre.

Learning outcomes

KNOWHow Nanotechnology and Genetic modification(GM) are being

used in Food technology UNDERSTANDThe benefits and risks to the consumer and agriculture from

these. BE ABLE TO… DESCRIBE what nano technology and GM foods are Give at least 3 examples of Nanotechnology and GM in foods EXPLAIN the role of the EU in the development and

understanding of Nanotechnology and GM in foods

Lesson 1 Dips

Lesson 2 PRACTICAL

Dips

Lesson 3 Dips

Lesson 4 & 5 Safe storage

Lesson 6 Standard

components

Lesson 7 PRACTICAL Bread sticks

Lesson 8 & 9 Design exam

Questions

Lesson 10 Research

Techniques

Lesson 11 & 12Functions of

foods

Lesson 13 PRACTICAL Bread and

share

Lesson 14 Manufacturing

quality and CAD/CAM

Lesson 15 Equipment

Lesson 16 PRACTICAL

Cultural breads

Lesson 17 Prototypes and sensory testing

Lesson 18 Nutrition and healthy Eating

Lesson 19 Nutrition and healthy Eating

Lesson 20 PRACTICAL Pastry twist

development

Lesson 21 Combining

ingredients and structures

Lesson 22 Acids, alkaline and additives

Lesson 23 Labelling and

packagingLesson 24 SECE

Lesson 25 Technological

Developments - NANO

Lesson 26 & 27 PRACTICE

EXAM

BIG PICTUREOF EXAM

PREP SHEET

LESSONS

What does the spec say?

Have an awareness of the reasons why food may be packaged in different forms to extend shelf life, including the use of new technologies such as nanotechnology

Have an awareness of how new technologies are used to produce new foods and ingredients, including nano foods and be aware of consumer concerns around these developments, including the views of the European Union.

Understand the advantages and disadvantages of Genetically Modified Foods to food producers and consumers;

•Working with nanoparticles is called nanotechnology.•Nanotechnology is the manufacture and use of materials and structures at the nanometre scale (a nanometre is one millionth of a millimetre)

Nanotechnology

Nanoparticples

NANOPARTICPLES are being developed that will deliver vitamins or other nutrients in food and beverages without affecting the taste or appearance.

These nanoparticles actually ENCAPSULATE the NUTRIENTS and carry them through the stomach into the bloodstream

Nanocapsules

Research is also being conducted to develop nanocapsules containing nutrients that would be released when nanosensors detect a vitamin deficiency in your body.

Basically this research could result in a super vitamin storage system in your body that delivers the nutrients you need, when you need them.

Nanosensors for bacteria detection

Nanosensors are being developed that can detect bacteria and other contaminates, such as salmonella, at a packaging plant.

This will allow for frequent testing at a much lower cost than sending samples to a lab for analysis.

This point-of-packaging testing, if conducted properly, has the potential to dramatically reduce the chance of contaminated food reaching grocery store shelves.

Packaging examples

Researchers are using silicate nanoparticles to provide a barrier to gasses (for example oxygen), or moisture in a plastic film used for packaging. This could reduce the possibly of food spoiling or drying out.

Zinc oxide nanoparticles can be incorporated into plastic packaging to block UV rays and provide anti bacterial protection, while improving the strength and stability of the plastic film.

Hygiene examples

Storage bins are being produced with silver nanoparticles embedded in the plastic.

The silver nanoparticles kill bacteria from any material that was previously stored in the bins, minimising health risks from harmful bacteria.

Agriculture example

Another development being pursued is a network of nanosensors and dispensers used throughout a farm field.

The sensors recognise when a plant needs nutrients or water, before there is any sign that the plant is deficient.

The dispensers then release fertiliser, nutrients, or water as needed, optimizing the growth of each plant in the field one by one.

Pesticides

Researchers are also working on pesticides encapsulated in nanoparticles; that only release pesticide within an insect's stomach, minimising the contamination of plants themselves.

Future projects

"Interactive" foods are being developed that would allow you to choose the desired flavour and colour.

Nanocapsules that contain flavour or colour enhancers are embedded in the food; inert (dormant) until a hungry consumer triggers them.

NOTE- The method hasn't been published, so it will be interesting to see how this particular trick is accomplished.

Food Science: Nanotechnology Company Directory

COMPANY PRODUCT

NancorBottles, cartons and films containing clay nanocomposite that act as a barrier to the passage of gasses or odors

Bayer Polymers Plastic film containing silicate nanoparticles that provides a barrier to gasses or moisture

AquaNovaNanoparticles for delivery of vitamins or other nutrients in food and beverages without affecting the taste or appearance.

Nano Science Diagnostics

Rapid testing for contaminates in food

Issues and concerns

Concerned about the safety of the consumer . They might speed up reactions in living things in

unpredictable ways, perhaps causing illness or death Since the properties of a given nanoparticle are not

easily predicted by studying the substance from which it is made, there are worries that nanoparticles may have undiscovered side-effects

Nano technology and the EU

The European Commission aims at reinforcing nanotechnology

At the same time making sure research and development of the technique occurs

Investigating the potential impact of nanotechnology on 1. Human health2. The environment via

Toxicological studies (The study of the nature, effects and detection of poisons and the treatment of poisoning)

ecotoxicological studies (the study of the effects of toxic chemicals on biological organisms) .

GM foods

What is a Genetically Modified (GM) Food?

1. Foods that contain an added gene sequence

2. Foods that have a deleted gene sequence3. Animal products from animals fed GM

feed4. Products produced by GM organisms

Who makes sure GM foods are safe?

GOVERNMENT AGENCIES REGULATE GM FOODS1. Department of the Environment, Food & Rural

Affairs 2. Food Standards Agency3. The Health & Safety Executive

NOTE • No genetically modified fruit or vegetables are on

the market in the EU; • None of the GM plants currently authorised in the

EU are intended for direct consumption.

The European Union grants approvals for GM foods to be sold in Europe and the UK.

This is done under the Novel Foods Regulation, which came into force in 1997

In the EU, if a food contains or consists of genetically modified organisms (GMOs), or contains ingredients produced from GMOs, this must be indicated on the label.

For GM products sold 'loose', information must be displayed immediately next to the food to indicate that it is GM.

Products such as meat, milk and eggs from animals fed on GM animal feed also don't need labelling.

Common GM Foods Vegetables Tomatoes Potatoes Rice Cheese - cheese produced with GM enzymes Meat

Products such as flour, oils and glucose syrups have to be labelled as GM if they are from a GM source.

GM food: A crop, such as a fruit or vegetable, or an animal can be genetically modified. (However, no animal or human genes, or GM animals, have been approved for use in GM food in the EU.)

GM ingredients: Food that comes from a GM crop, such as maize, can be processed, for example into flour, and the GM DNA is still present in the food and can be identified.

Scientists have genetically modified sweet corn so that it produces a poison which kills harmful insects. This means the farmer no longer needs to fight insects with insecticides. (sold in US)

Golden rice is genetically modified rice that now contains a large amount of A-vitamins. Or more correctly, the rice contains the element beta-carotene which is converted in the body into Vitamin-A. So when you eat golden rice, you get more vitamin A. (sold in US)

The genetically modified Tomato produces less of the substance that causes tomatoes to rot, so remains firm and fresh for a long time.

GM papayas are not approved for sale in EU, but are in the United States. Papayas are genetically modified to fight a particular virus that can infect and kill crops quickly.

A genetically-engineered version of the milk-clotting enzyme chymosin is also used in cheese-making.

Possible Benefits of GM Foods

Easing of world hunger Development of crops that can be

grown in marginal soil Reduced strain on nonrenewable

resources Development of drought resistant

crops Development of salt-tolerant

crops Development of crops that make

more efficient use of nitrogen and other nutrients

Possible Benefits of GM Foods

REDUCED USE OF PESTICIDES AND HERBICIDES►Development of pest resistant crops ►Reduced herbicide use is better for the

environment and reduces costs for farmers

Possible Benefits of GM Foods

IMPROVED CROP QUALITY Development of frost resistant

crops Development of disease resistant

crops Development of flood resistant

crops IMPROVED NUTRITIONAL QUALITY

Development of foods designed to meet specific nutritional goals

Possible Risks of GM Foods

Insects might develop resistance to pesticide-producing GM crops

Herbicide-tolerant crops may cross-pollinate weeds, resulting in "superweeds"

Possible Risks for GM Foods

Certain gene products may be allergens, thus causing harm to human health

There may be unintended harm to wildlife and beneficial insects

Review

RECALL 5 facts about Nanotechnology and 5 facts about GM foods.