Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
Daphnia |
5 different concs Count heart beat 20 sec x 3 |
|
|
What factors need to be Controlled in daphnia experiment |
Temperature , caffeine solution , try and choose similar size daphnia |
|
|
How would you test for vitamin c in food |
6 solutions , DCPIP until colourless, calibration curve |
|
|
Investigate cell membrane stricture |
Beetroot , five samples . Rinse, water , water baths at different temp, remove beetroot, colourimeter |
|
|
Tensile strwngth |
Clamp stand, attach fibre , keep adding weights measuring each time until breaks , higher mass higher tensile strength |
|
|
What to keep constant in tensile strength practical |
Fibres same length Humidity Temperature Safety |
|
|
How to test for anti microbial properties in planfs |
Agar plate of bacteria , spread using plastic spreader Prepare extracts , grind and soak in ethanol , filter off so you have liquid Add sterile paper to each liquid and control disk, place paper on plate 25° incubation to stop unwanted human pathogens 24-48 hours Zone of inhibition |
|
|
In antimicrobial Experiment why do you soak in ethanol |
Because it will remove the anti microbial properties as it is soluble |
|
|
What to be carful when looking at antimicrobial properties |
Insulate in 27° so deadly bacteria cannot form Oxygen needed Nutrient |
