Food traceability and authentication - DNA
10 important questions on Food traceability and authentication - DNA
Why can you use DNA for species traceability and food authentication?
What approche is used to link DNA to species authentication?
Why can it be hard to extract DNA from food?
- Very lipophilic matrices (fats and oils) in which very little amount of DNA is present
- Very complex matrices with surfactants and emulsifier which hamper extraction
- Presence of specific interferents able to inhibit PCR, mostly polyphenols
- 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.
If you have a negative result in DNA analysis is this really a negative result?
What is DNA barcoding?
The gene order is put together like a barcode
What are the advantages of DNA barcoding?
- Conventional and inexpensive protocals for DNA extraction, amplification and sequencing. Thus reference library increases, enabling the rapid identification with specific short-DNA sequences.
- New Sequencing techniques such as prysoquencing enable rapid and representative analysis of mixed samples.
Can you also use DNA barcoding for plans?
Is a negative result prove that no other DNA is present?
A negative results in to sufficient to tell that a DNA is absent, because usually the limit of detection is not known, so they should be uses only as a positive confirmation, since not detected DNA can only be, actually, not detectable, which does not mean absent.
What is the advantage of using DNA to authenticate food stuffs?
- Strong rationale providing clear cut results (if the method applied is well developed in order to avoid ambiguities and DNA is extractable and can be amplified)
- Can be applied to almost every foodstuff, since DNA is everywhere
What is the disadvantage of using DNA to authenticate food stuffs?
- Authentication only of species/varieties/breeds, so whatever is genetically different. Can not authenticate place of production, technology, processing
- Accurate quantitation might be difficult, the technique is better suited to present/not present answers
- In heavily processed food DNA can be difficult to amplify, giving false negative results
- Mixure of many different species might complicate the analysis
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
