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

Author Question: Do any of the pigments change color when heated for a long period of time? Which? Explain the ... (Read 74 times)

chads108

  • Hero Member
  • *****
  • Posts: 507
on: Aug 19, 2018
Do any of the pigments change color when heated for a long period of time? Which? Explain the reaction.

Question 2

Compare the colors of the vegetables used when cooked in acid and alkaline cooking water. Which are the predominant pigments in these vegetables?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ApricotDream

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Aug 19, 2018
Answer to Question 1

Red cabbage changed to a dark blue after being cooked for about 25 minutes. Also, cooking the cauliflower for a long time turned it a pink color.

Answer to Question 2

When acid was added to broccoli, it turned brown. When a base was added, the broccoli turned bright green, but became mushy in texture. The predominant pigment in broccoli is chlorophyll. When acid was added to carrots, they turned a bright orange, but when a base was added, they turned a dark orange; the pigment in carrots is beta-carotene. When acid was added to red cabbage, it turned a purple shade, and when a base was added it turned a green/blue shade; the pigment in red cabbage is anthocyanin. When an acid was added to cauliflower, it stayed white, and it turned yellow when a base was added; the predominant pigment in cauliflower is anthoxanthin.


chads108

  • Hero Member
  • *****
  • Posts: 507
Reply #2 on: Aug 19, 2018
Both answers were spot on, thank you once again


ApricotDream

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Aug 19, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Greenstick Only one side of the shaft is broken, and the other is bent (like a greenstick); usually Greenstick Only one side of the shaft is broken, and the other is bent (like a greenstick); usually
Meal Time Meal Time
If you want to show differences between items at the same time, a bar graph is more effective than a If you want to show differences between items at the same time, a bar graph is more effective than a
Some photosynthetic pigments Some photosynthetic pigments
Embryonic Period Embryonic Period
Part of a Semantic Network in Long-Term Memory Part of a Semantic Network in Long-Term Memory
Video: Methods that regulate pH

For a complete list of videos, visit our video library