Phenolic Compounds - Case 2: potato - Reaction with proteins
9 important questions on Phenolic Compounds - Case 2: potato - Reaction with proteins
Why dont you wand to have enzymatic browning?
- You get an off-colour
- Due to the reaction with proteins the digestibility of the proteins goes down
How did they analyse the major phenolics in patato juice?
The peaks were then analysed by wave length and mass spectrometry.
Why do they add acetic acid to the freeze-dried potato in the HPLC?
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
For my 1st exam I got a C. Then, I started looking for ways to learn better and I came across Study Smart. Since then I have scored a A+, A, A- and another A. I highly recommend it to everyone who wants to hear it. I am so happy with it!!
I was struggling to finish all my first-year subjects for 3 years. Then I discovered Study Smart, which helped me to finish all of them within 3 months.
Because of StudySmart, things are going well in many ways. Before, I always had study stress and no time for anything. Now I feel calm and confident (because of the program). I used to score a B, now I usually score an A or A+.
Hey Chris, I really want to thank you very much for developing the platform, I usually got around C for my exams, now I scored an A+, an A and a A- !!
Since using Study Smart, my average has increased significantly. I even completed a statistics course with a A+ while I'm bad at statistics. I took on extra courses this year, because of Study Smart. Thanks so much!
Ever since I started studying with StudySmart I passed all my exams !!! No more re-sits!! At first, I was happy with a pass and now I only get good grades. Many thanks!
I aced all the courses I studied with Study Smart. For law, I first scored a D, and now an A! I’m 100% sure that I’ll pass all the courses I study with Study Smart.
I always thought I studied well. My grades were fine. I could never have imagined that applying these study skills would have such a huge and direct impact on my grades, my speed and the pleasure I have in learning.
For the first time, I finally feel totally confident about the way I learn. I have the perfect overview and make great progress in terms of speed and the grades I get. Thanks, Chris!
I immediately started to enjoy learning again, and my grades soared. All of a sudden, everything went better. I highly recommend Study Smart to all students..
Being able to create my materials online made the process of studying so much smoother and quicker. I no longer have to spend a huge amount of my time on creating my summaries.
At first, my notes were a mess. Now I use Study Smart to take my notes in a perfectly structured way. It helps me to save a lot of time and do other things I enjoy.
Students that study with Study Smart get better grades. The system applies all the learning methods in such a way that both well-performing students and students who struggle perform much better.
Hi Chris, I would like to thank you very much. Last year I scored C on a course, and this year I got an A+ thanks to your method! Thank you very much!
The largest effect is that my child is more enthusiastic about school! Every parent wants their children to be happy at school, Study Smart made it happen.
In high school, I failed several exams, and that has really changed now. I actually needed this tool very much back then. Since I started studying with StudySmart, I haven't had any D's. My average score is now an A and those are results I would have never had in the past
With my old method, I passed only 3 out of 8 courses. Since I started taking my notes digitally in Study Smart, I have passed all my courses on the first try. For me, StudySmart takes away the stress of wondering if I will pass or not.
Thanks to StudySmart, I passed all my exams, and with better grades than before! On top of that, I have mastered a very good study method now, which I am confident will help me earn my degree.
What are the isomers of this compound?
- There are 2 other hydroxyl groups, the caffeic acid can also bind to the other.
- Now it has a trans configuration but it can also be a cis configuration.
- So in total 6 isomers
Which part of the molecule is the black and which part is the blue?
- black is the quinic acid
- Blue is the caffeic acid
How can you determon which compound you have if they have the same molar mass?
Why do you get brown colored potato juice?
- polypenol oxidase (tyrosinase) converts orto-dipehnols into ortho-quinones by using oxygen.
- These ortho-quinones are highly reactive an can for brown pigments or bind to proteins that also form brown pigments.
- So chlorogenic acid reacts into brown pigments.
How did they measure how much chlorogenic acids reacted with proteins?
One with MeOH and one that is Oxidised (without treatment).
- You centrifuge to get the bigger particles out.
- Then you ultrafiltrate the supernatant.
- It will be saparated in 2 groups, smaller then 10KDa and biggerd then 10KDa.
- The chloroginic acid that did not react will be in the smalller then 10KDa
- The cloroginic acid that did react will be in the bigger then 10KDa.
How can you find out how much chloronic acid is bound to proteins?
- You do a alkaline hydrolysis to get break the ester bonds and get the quinic acid off.
- Then you do a UHLC to see how much quinic acid you have.
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
- 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
