Food Loss and Cold Chains Impact

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Questions and Answers

What percentage of food is lost before reaching consumers?

  • 25%
  • 17%
  • 42%
  • 14% (correct)

High risk foods must be kept below 5 degrees Celsius or above 65 degrees Celsius to avoid the danger zone.

True (A)

What protocol was signed in 1987 to help save the ozone layer?

Montreal Protocol

The term for the temperature supply chain for food is called the _____ chain.

<p>cold</p> Signup and view all the answers

What is one reason cooling technologies can be problematic?

<p>They consume a lot of electricity. (D)</p> Signup and view all the answers

Breaking the cold chain increases the risk of _____ contamination.

<p>food</p> Signup and view all the answers

Match the following temperatures with their corresponding safety categories:

<p>Below 5°C = Safe for high risk foods Above 65°C = Safe for high risk foods Between 5°C and 65°C = Danger zone</p> Signup and view all the answers

Keeping food at temperatures above 5 degrees Celsius is desirable for preventing bacteria multiplication.

<p>False (B)</p> Signup and view all the answers

What is the recommended storage temperature for frozen foods?

<p>-18 degree Celsius (A)</p> Signup and view all the answers

Raw whole fruits and vegetables require refrigeration to minimize spoilage.

<p>False (B)</p> Signup and view all the answers

What happens to ice crystals during a slow freezing process?

<p>They grow larger.</p> Signup and view all the answers

The process of rapidly freezing food to keep ice crystals small is called _____ freezing.

<p>blast</p> Signup and view all the answers

Match the food type with its storage requirement:

<p>Cheese = Requires refrigeration after ripening Raw whole fruits = Can be stored at room temperature Frozen chicken = Stored at -18 degree Celsius Blast freezer = Temperature set up to -40 degree Celsius</p> Signup and view all the answers

What is the purpose of using a tip sensitive thermometer?

<p>To accurately measure the core temperature of food.</p> Signup and view all the answers

Why is it important to clean and disinfect the thermometer before use?

<p>To prevent inserting forbidden bacteria (A)</p> Signup and view all the answers

Blast freezing takes between 30 to 90 minutes to lower the temperature to -18 degree Celsius.

<p>True (A)</p> Signup and view all the answers

What is the main purpose of canning food?

<p>To kill germs and remove air from foods (C)</p> Signup and view all the answers

Dried milk is made by adding moisture to fresh milk.

<p>False (B)</p> Signup and view all the answers

What are the conditions necessary for storing dried foods like flour and rice?

<p>Tight fitting lids in containers</p> Signup and view all the answers

Foods like fish and meat should be kept covered in the __________.

<p>refrigerator</p> Signup and view all the answers

Match the following methods of preserving meat with their descriptions:

<p>Cold storage = Halts the activity of microorganisms Canning = Packaging and sealing under high temperature Smoking = Kills bacteria and slows down growth Salting = Creates a too salty environment for bacteria</p> Signup and view all the answers

Which of the following is NOT a method of preserving milk?

<p>Canning (C)</p> Signup and view all the answers

The best way to store maize and beans is in glass containers.

<p>False (B)</p> Signup and view all the answers

What effect does boiling have on meat during preservation?

<p>It kills most bacteria and reduces multiplication.</p> Signup and view all the answers

What is the primary component of the environmentally friendly material mentioned?

<p>70% clay particles (A), Water (D)</p> Signup and view all the answers

Anti-microbial packaging only prevents bacteria from spreading to food.

<p>False (B)</p> Signup and view all the answers

Name one traditional method of food preservation.

<p>Smoking</p> Signup and view all the answers

Food preservation is the process of storing food properly for a certain period of time to avoid being ___.

<p>spoiled</p> Signup and view all the answers

Which of the following is a modern method of food preservation?

<p>Refrigeration (B)</p> Signup and view all the answers

Match the preservation methods to their descriptions:

<p>Smoking = Keeps bacteria and fungi away from meats Salting = Preserves fish and meat Drying = Removes most of the water from food Freezing = Stores foods below 0 degrees Celsius</p> Signup and view all the answers

What is the purpose of using super sensors in intelligent packaging?

<p>To determine if food is tainted (D)</p> Signup and view all the answers

A charcoal cooler is used to preserve food in areas that have no ___.

<p>electricity</p> Signup and view all the answers

What is the purpose of pasteurization in milk processing?

<p>To kill harmful bacteria and ensure safety for human consumption (A)</p> Signup and view all the answers

HTST pasteurization involves heating milk to 70 degrees Celsius for 30 seconds.

<p>False (B)</p> Signup and view all the answers

Name one of the top consumers of milk powder.

<p>China</p> Signup and view all the answers

During the concentration process, water is removed to enhance milk powder's _________.

<p>shelf-life</p> Signup and view all the answers

Match the types of fish with their descriptions:

<p>Live fish = Fish sold in its living state Fillets = Common cut available from any fish Dressed fish = Fish with scales, organs, fins, head, and tail removed Steaks = Chop cut from larger fish like tuna or tanigue</p> Signup and view all the answers

What is added to milk powder to ensure it dissolves easily in water?

<p>Soy lecithin (D)</p> Signup and view all the answers

Proper packaging of milk powder protects it from air, humidity, and light.

<p>True (A)</p> Signup and view all the answers

What temperature is milk preheated to during processing?

<p>Approximately 60 degrees Celsius</p> Signup and view all the answers

Which type of fillet is created by cutting a flat fish fillet in half lengthways?

<p>Quarter cut fillet (B)</p> Signup and view all the answers

Bleeding is not necessary for most species of fish.

<p>False (B)</p> Signup and view all the answers

What is the purpose of salting fish during the preservation process?

<p>To force out water from the flesh and enhance flavor.</p> Signup and view all the answers

___ involves treating fish with vinegar, garlic, and ginger.

<p>Kilaw</p> Signup and view all the answers

Match the following preservation methods with their descriptions:

<p>Salting = Adding salt to fish until it seeps through the flesh Drying = Exposing fish to heat or sun to remove moisture Smoking = Exposing fish to wood smoke for flavor Pickling = Treating fish with vinegar &amp; spices</p> Signup and view all the answers

Which of the following tools is used to remove the scales of fish?

<p>Fish scaler (A)</p> Signup and view all the answers

What is one method of artificial drying?

<p>Using an oven or constructed drier.</p> Signup and view all the answers

Sun drying involves using a mechanical kiln to dry fish.

<p>False (B)</p> Signup and view all the answers

Flashcards

Food Cold Chain

A temperature-controlled system for transporting, storing, and handling perishable food throughout the entire supply chain, maintaining suitable temperatures.

Breaking the Cold Chain

Allowing perishable food to reach temperatures above 5°C, increasing the risk of bacterial growth and food spoilage.

High-Risk Foods

Foods that need to be kept at temperatures below 5°C or above 65°C to prevent bacterial growth and food poisoning.

Temperature Control

Maintaining the right temperature for food storage, handling, and transportation to minimize bacterial growth, spoilage and food poisoning risk.

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Food Loss

Food lost before reaching consumers

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Food Waste

Food lost after reaching consumers

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Montreal Protocol

An international agreement to phase out ozone-depleting substances.

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Danger Zone

Temperature range (approximately 5°C - 65°C) where bacteria multiply rapidly in food.

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Food Temperature Control

Different foods require different storage temperatures to maintain quality and safety. Some foods can be stored at room temperature, while others need refrigeration or freezing.

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Refrigerated Foods

Foods that need to be stored at temperatures below room temperature to prevent bacterial growth and spoilage.

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Room Temperature Foods

Foods that can be safely stored at about 20°C, including some raw fruits and vegetables. Storage at this temperature greatly affects how long the product lasts, so it also minimizes spoilage.

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Frozen Food Storage

Foods that need to be stored at -18°C to prevent bacterial growth and maintain freshness.

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Core Temperature Measurement

Taking the temperature of the food's innermost part (the core) for accurate measurements since the outside temperature might not reflect the true temperature inside.

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Blast Freezing

A process of rapidly freezing food using a blast of cold air, usually to approximately -18 degrees Celsius, to minimize ice crystal size, and to preserve quality and nutrients.

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Blast Freezer Temperature

Blast freezers are set to very low temperatures (around -40°C) to quickly reduce the temperature of the food within 30-90 minutes to prevent ice crystals from damaging cellular structures.

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Ice Crystal Size and Freezing

Rapid freezing produces smaller ice crystals, which is better for food quality than slower freezing, as it minimizes the cell bursting impact of ice crystal expansion.

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Canning

A method of preserving food by heating it to a high temperature to kill germs and remove air, then sealing it in airtight containers.

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Cold Storage

Storing food at low temperatures to slow down the growth of microorganisms, extending its shelf life.

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Smoking Meat

A method of preserving meat by exposing it to smoke, which kills bacteria and slows down the growth of others.

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Drying Food

Removing moisture from food to create an unfavorable environment for bacteria, extending the shelf life.

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Salting Meat

Covering meat with salt to create an environment too salty for bacteria to survive, effectively preserving it.

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Boiling Meat

Regularly boiling meat to kill bacteria and reduce their multiplication, extending its shelf life.

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Drying Milk

Removing moisture from milk to create a powder form, making it impossible for bacteria to survive.

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Pasteurization

Partially sterilizing milk by heating it to kill off harmful bacteria, extending the shelf life.

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Food Preservation

The process of storing food properly to prevent spoilage and extend its shelf life.

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Traditional Food Preservation Methods

Older methods of preserving food using natural techniques like smoking, salting, drying, and using honey.

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Smoking (food preservation)

A method of preserving meat and fish by exposing it to smoke from burning materials. This process reduces bacteria and fungi growth.

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Salting (food preservation)

Preserving food by using salt to draw out moisture from microorganisms and inhibit their growth.

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Drying (food preservation)

Removing water from food to reduce spoilage-causing microorganisms and thus extend its shelf life.

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Modern Food Preservation Methods

Methods of food preservation involving technology like refrigeration and freezing.

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Freezing (food preservation)

Preserving food under very low temperatures below 0 degrees Celsius using deep freezers.

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Refrigeration (food preservation)

Preserving food at low temperatures (0-8 degrees Celsius) using refrigerators, limiting microbial growth.

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Milk Quality Checks

Milk is tested for purity and quality, including checks for contaminants, bacteria levels, butterfat, and protein content.

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HTST Pasteurization

A common pasteurization method that heats milk to 70 degrees Celsius for 15 seconds, killing most harmful bacteria.

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Milk Concentration

The process of removing water from milk to increase its shelf life and create a more concentrated product.

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Milk Powder Drying

Milk is sprayed into a hot chamber where it dries and transforms into milk powder.

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Soy Lecithin in Milk Powder

Soy lecithin is added to milk powder to improve its solubility in water, making it easy to reconstitute.

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Milk Powder Packaging

The process of packaging milk powder in a way that protects it from light, air, and humidity, ensuring quality and shelf life.

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Top Milk Powder Consumers

China, India, Indonesia, Vietnam, and Mexico are the leading consumers of milk powder.

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Butterfly Fillet

A whole fish, usually smaller, with its head removed and cut open along the back or belly to lie flat.

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Quarter Cut Fillet

A single flat fillet cut lengthwise in half, creating two smaller fillets.

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Fish Sticks

Small, rectangular pieces of fish, usually minced, breaded, and frozen, made from fillets or steaks.

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Beheading a Fish

Removing the fish's head by making a slanted cut along the gills.

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Gutting a Fish

Removing the internal organs of a fish by making a cut from the gill cavity to the anal vent.

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Dry Salting

Preserving fish by directly covering it with salt granules.

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Brine Solution

A mixture of salt and water used to preserve fish by soaking them in it.

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Sun Drying Fish

Drying out fish by spreading it on a tray and exposing it to sunlight.

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Study Notes

Food Loss & Waste

  • 14% of food is lost before reaching consumers, and 17% is wasted annually.
  • Ineffective cold chains are a major cause.
  • Perishable food needs controlled temperature throughout production, storage, processing, marketing, and distribution.
  • Cooling technologies consume a significant amount of electricity, often from fossil fuels.
  • Ozone-depleting substances (ODS) and hydrofluorocarbons (HFCs) are powerful greenhouse gases.
  • Cold chains contribute about 4% of global GHG emissions, impacting climate change and food production.
  • Lack of access to cold chains affects food security, livelihoods, and market access.

Improving Food Cold Chains

  • The Montreal Protocol (1987) aims to protect the ozone layer by phasing out ODS in cooling technologies.
  • Phasing down HFCs addresses energy efficiency.
  • Sustainable food cold chains support the SDGs and benefit farmers, fishers, and communities.
  • Better access to nutritious foods is a key goal.

Temperature Control

  • Temperature control minimizes bacterial multiplication and reduces food spoilage risk.
  • Keeping food outside safe temperature zones increases spoilage risk.
  • The "cold chain" is a key principle in temperature control.

Food that Doesn't Need Temperature Control

  • Some foods, like raw, whole fruits and vegetables, can be stored at room temperature (about 20°C) to maintain quality.
  • Storing them properly prevents spoilage and maximizes shelf life.

Frozen Foods

  • Frozen foods must be kept below -18°C, both during storage and transport.
  • Maintaining this temperature is crucial for quality.
  • Different food types should be stored separately (dairy, meat, poultry, and fish).

Measuring Food Temperatures

  • Core temperature (middle of the food) should be measured, as the outside might be different.
  • A sensitive thermometer or probe is necessary for accurate measurements.
  • Cleaning and disinfection of the thermometer before use is essential to avoid contamination.

Blast Freezing

  • A process that quickly reduces food temperature.
  • High-velocity cold air lowers the temperature rapidly, reducing ice crystal size and maintaining food quality.
  • Helps protect nutrients and flavor in foods like chicken.
  • Important for preserving texture and flavor

Food Packaging Technologies

  • Packaging keeps food safe and increases its shelf life.
  • Various packaging materials exist: paper/paperboard, plastic, glass, and metal.
  • Each material has advantages and disadvantages in terms of cost, properties, and environmental impact.

Edible Packaging

  • Innovative packaging created using edible materials.
  • Examples include containers for pumpkin soup, spinach membrane, lemon juice in lemon membrane, and melting chocolate in cherry membrane.

Micro-Packaging

  • A nanotechnology-based material that is 70% water and clay.
  • It's a thin film-like substance, offering preservation capabilities compared to other food packaging options.

Intelligent Packaging

  • Innovative packaging for food.
  • The packaging has sensors that determine whether the food is contaminated.
  • Designed to preserve the viability of food more effectively.

Antimicrobial Packaging

  • Packaging that inhibits the growth and spread of bacteria, beyond just preventing bacteria from contacting the food.
  • This type of antimicrobial protection offers a long shelf-life for food.

Food Preservation

  • Methods for storing food for prolonged periods, preventing spoilage.
  • Includes traditional (e.g., smoking, salting, drying, and low-temperature storage) and modern methods (e.g., canning, freezing).
  • Each method addresses issues like bacterial, pest, and fungal contamination to ensure food safety.

Milk Preservation

  • Pasteurization is a critical step in milk preservation to achieve safety standards.
  • Temperature and time parameters are essential in the process.
  • Milk powder preservation is beneficial for storage.
  • Proper packaging is essential to maintain quality and safety during storage.

Fish Preservation

  • Methods for Fish Preservation include drying, salting, and smoking to maintain freshness and inhibit bacterial growth.
  • Different sizes and preparation methods for fish are used for preservation.

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