How do you solve ET50?

Contents

1 How do you solve ET50?
2 How is CO2 used to measure photosynthesis?
3 How do you calculate photosynthetic rate?
4 What is the relationship between sodium bicarbonate and photosynthesis rate?
5 How CO2 affects the rate of photosynthesis?
6 What is the meaning of the abbreviation ET50?
7 What’s the difference between EC 50 and E Max?
8 What does the C stand for in an IC50?

To determine the ET50-light for this trial, plot the percent leaf disk floating as a function of time: From the above graph, we can interpolate that 50% of the leaf disks floated at 5.5 minutes. Therefore, the ET50-light is 5.5 minutes.

How is CO2 used to measure photosynthesis?

Count the number of oxygen bubbles given off by the plant in a one -minute period. This is the rate of photosynthesis at that particular concentration of CO2. The gas should be checked to prove that it is indeed oxygen – relights a glowing splint.

What is the purpose of the floating leaf disk lab?

In the floating leaf disk procedure, a vacuum is used to remove trapped air and infiltrate the interior of plant (leaf) disk samples with a solution containing bicarbonate ions that serve as a carbon source for photosynthesis.

How do you calculate photosynthetic rate?

Photosynthesis measured is usually “Net” (i.e., net amount of CO 2 taken up or O 2 released by total plant metabolism) Net Primary Production (NPP) = Gross Primary Production (GPP) – Plant Respiration (R p) GPP does not all go to plant growth, herbivores, litterfall etc.

What is the relationship between sodium bicarbonate and photosynthesis rate?

The rate of photosynthesis steadily increased as the concentration of carbon dioxide present (sodium bicarbonate solution concentration) increased (directly proportional relationship).

At what concentration of CO2 photosynthesis reaches at highest rate?

Photosynthesis increases as CO2 increases until some saturating concentration, which is typically around 1,000 ppm. Enriching the air with CO2 enables plants to more effectively utilize light, resulting in an increase in the light saturation point.

How CO2 affects the rate of photosynthesis?

Carbon dioxide concentration Carbon dioxide – with water – is one of the reactants in photosynthesis. If the concentration of carbon dioxide is increased, the rate of photosynthesis will therefore increase.

What is the meaning of the abbreviation ET50?

ET50 This abbreviation is used for the exposure time required to produce a defined effect when a test population is exposed to a fixed concentration or specified dose of a toxicant.

How to do ET50 value determination in photosynthesis?

What’s the difference between EC 50 and E Max?

The [A] at which E is 50% of E max is termed the half maximal effective concentration and is abbreviated EC 50, or rarely [A] 50. The term “potency” refers to the EC 50 value. The lower the EC 50, the less the concentration of a drug is required to produce 50% of maximum effect and the higher the potency.

What does the C stand for in an IC50?

“IC” means inhibitory concentration, so is used for dose-response curves that go downhill, because the drug inhibits a response. In both cases, “C” stands for concentration. In some experiments, you vary the administered dose, but don’t know the effective concentration. In these cases, the midpoint is called the ED50.