Polysaccharides - Pectin: Gelling properties
3 important questions on Polysaccharides - Pectin: Gelling properties
How does the pH influence the pectin?
The pectin has galacturonic acid groups. At neutral pH (7), the carboxyl groups are negatively charged. At acidic pH (2-3) the carboxyl groups are neutral.
How and what kind of gel can be made with LM-pectin?
A calcium gel. The unsubstituted negative carboxyl groups (pH is high) can form ionic bonds with Ca2+ between 2 polysaccharides. An egg-box model is formed.
How and what kind of gel can be made with HM-pectin?
A sugar-acid gel. The formation of junction zones is stimulated by:
- High concentration of sugar --> hold water, so lowers water activity --> molecules move closer
- Low pH (neutral charge of polysaccharides) --> less repulsion
Try our study magic for free
a PDF, study it super fast
- No sign up, email or credit card needed!
- AI makes unlimited flashcards
- Get unlimited quizzes and tests
- Ask AI anything
Create a notebook
- No sign up, email or credit card needed!
- Have and keep perfect overview
- Make flashcards, notes and mind maps
- Review, test and score!
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
