This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How does the dipping pretreatment prevent browning? What will be an ideal ... (Read 63 times)

P68T

  • Hero Member
  • *****
  • Posts: 509
on: Aug 2, 2018
How does the dipping pretreatment prevent browning?
 
  What will be an ideal response?

Question 2

Explain why tomatoes and zucchini do not require a pretreatment.
 
  What will be an ideal response?

Question 3

What causes some fruits (like apples) to brown after they have been cut and exposed to the air? What is the reaction? Browning is call enzymatic browning. Apples contain an enzyme called polyphenol
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

al

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Aug 2, 2018
Answer to Question 1

The dipping pretreatment is an acid. It lowers the pH and thus prevents the action of the enzyme that causes browning.

Answer to Question 2

Tomatoes are acidic and do not brown when dehydrated. For zucchini the answers may vary but zucchini have lower amounts of phenolic compounds and/or less phenolase.

Answer to Question 3

oxidase or phenolase. In the presence of oxygen from the air, this enzyme catalyzes the formation in the biochemical conversion of plant phenolic compounds to brown pigments known as melanins.


P68T

  • Member
  • Posts: 509
Reply 2 on: Aug 2, 2018
Wow, this really help

T4T

  • Member
  • Posts: 348
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Cade and colleagues discovered a way to improve athletic performance and prevent salt and water imba Cade and colleagues discovered a way to improve athletic performance and prevent salt and water imba
Jane Goodall first observed Gombe chimpanzees chewing leaves, then dipping the chewed-up “wadge” int Jane Goodall first observed Gombe chimpanzees chewing leaves, then dipping the chewed-up “wadge” int
Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b
PPE used to prevent exposure to bloodborne pathogens. PPE used to prevent exposure to bloodborne pathogens.
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
Can gene therapy be used to cure patients with HIV infections or to prevent HIV infections? Can gene therapy be used to cure patients with HIV infections or to prevent HIV infections?
Video: Mendel's Principles of Dominance, Segregation and Independent Assortment

For a complete list of videos, visit our video library