Ch. 9 - Controlling Microbial Growth in the Environment

Bauman - Microbiology with Diseases by Taxonomy 6th Edition

Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook

Bauman 6th Edition

Ch. 9 - Controlling Microbial Growth in the Environment

Problem 14

Chapter 9, Problem 14

What are some advantages and disadvantages of using ionizing radiation to sterilize food?

Verified step by step guidance

Step 1: Understand what ionizing radiation is and how it works in food sterilization. Ionizing radiation involves high-energy rays (such as gamma rays, X-rays, or electron beams) that can penetrate food and kill microorganisms by damaging their DNA and cellular structures.

Step 2: Identify the advantages of using ionizing radiation for food sterilization. These include its ability to effectively kill bacteria, viruses, and parasites without raising the temperature of the food, thus preserving the food's texture, flavor, and nutritional value.

Step 3: Recognize that ionizing radiation can penetrate packaged foods, allowing sterilization after packaging, which reduces the risk of recontamination.

Step 4: Consider the disadvantages, such as the potential for changes in food chemistry that might affect taste or texture in some foods, and the public perception or consumer concerns about irradiated food safety.

Step 5: Note the regulatory and cost factors, including the need for specialized equipment, safety precautions for workers, and compliance with food safety regulations, which can limit widespread use.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.

Video duration:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Ionizing Radiation

Ionizing radiation refers to high-energy radiation, such as gamma rays, X-rays, or electron beams, that can remove tightly bound electrons from atoms, creating ions. It is used in food sterilization to kill microorganisms by damaging their DNA and cellular structures, effectively reducing spoilage and pathogens.

Advantages of Ionizing Radiation in Food Sterilization

Advantages include effective microbial inactivation without raising food temperature, preserving nutritional and sensory qualities. It extends shelf life, reduces the risk of foodborne illnesses, and can penetrate packaging, allowing sterilization after packaging.

Disadvantages of Ionizing Radiation in Food Sterilization

Disadvantages include potential changes in food texture or flavor, consumer concerns about safety, and the need for specialized equipment and regulatory approval. Some nutrients may degrade, and improper dosing can lead to incomplete sterilization or food damage.

Recommended video:

Guided course

06:18

Irradiation

Related Practice

Textbook Question

How can campers effectively treat stream water to remove pathogenic protozoa, bacteria, and viruses?

856

views

Textbook Question

Which of the following chemicals is active against bacterial endospores?

a. Copper ions

b. Ethylene oxide

c. Ethanol

d. Triclosan

824

views

Textbook Question

Which of the following substances is least toxic to humans?

a. Carbolic acid

b. Glutaraldehyde

c. Hydrogen peroxide

d. Formalin

765

views

Textbook Question

Biosafety Level 3 includes:

a. Double sets of entry doors

b. Pressurized suits

c. Showers in entryways

d. All of the above

672

views

Textbook Question

Contrast the structures and actions of soaps and quats.

732

views

Textbook Question

A sample of E. coli has been subjected to heat for a specified time, and 90% of the cells have been destroyed. Which of the following terms best describes this event?

a. Thermal death point

b. Thermal death time

c. Decimal reduction time

d. None of the above

824

views