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The effect of molecular weight on the rate of diffusion lab
Diffusion lab
Diffusion lab
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More handpicked essays just for you.
The effect of molecular weight on the rate of diffusion lab
Diffusion lab
Diffusion lab
Don’t take our word for it - see why 10 million students trust us with their essay needs.
These difficulties might have caused me to make mistakes on the amount needed to pipette or the type of substance. Overall, next time I would have made sure to pay closer attention to the pipetting portion of the procedure. Furthermore, we could extend this experiment by trying different kinds of
This experiment was created to contrast the effects of osmosis between three gummy bears in tap, sugar, and salt water. To compare the gummy bears, three cups were gathered and filled with twenty-five milliliters of the particular water solution. Then the mass and volume of each gummy bear was recorded into a chart. To find the mass, zero a balance once a strip of wax paper is placed over, and then place your gummy bear and record the mass. To find the volume of the bear, multiply the length, width, and height of the bear in centimeters with the help of a ruler.
The results for my organism Escherichia coli consist of performing several tests to determine the organism’s characteristics. One of the tests I chose to perform is a starch hydrolysis test this is a differential test to help determine if the organism can produce enzymes amylase used absorb starch. This test helps to determine if E. coli can break down starch, and if it can we know that it has the ability of producing coenzymes called Amylase use in breaking down glucose bonds. If the organism can break down glucose then it produces a necessary enzyme called amylase used in breaking sugar bonds apart because they are to large to enter the cells. To determine the results in this test iodine is used after the medium has been inoculated and incubated so that the organism has time to absorb the starch in the plate.
This experiment is extremely beneficial to biochemists because determining the amount of protein in a solution is crucial. Also, because spectrophotometers are useful for determining the substances that
For example, the potato pieces were measured and cut using a standard ruler. As a result the length of the potato pieces were inaccurate by 0.1-0.2 cm. This could have caused misinterpretations and inconsistency in the data. Another limitation while conducting this experiment was that our working station and storage stations were different. As a result, once we finished working, we had to move the beakers containing the sugar solution and potato pieces to a secluded and secure location to avoid disturbance.
First, it was hypothesized that test tube "A", the control, would not show any red concentration, test tube "B" which contains supernatant II would show the most red concentration and test tube "C" which contains sediment II would only show a little red concentration. The second hypothesis states that the raw corn kernels would have mitochondrial activity while the boiled corn kernels would not. The last hypothesis interprets that the "gunk" and sediment I will both contain starch granules. It was only expected to find mitochondrial activity in Supernatant II. Unfortunately, after performing this experiment, we were not able to support this hypothesis and come up with a conclusion.
Results and Observations for Organic Macromolecule Presence Tests Test for Lipids Test for Proteins Test for Glucose Test for Starch Observations: Observations: Observations: Observations: Paper-bag has a translucent spot The stomach contents became purple The stomach remained blue The stomach contents became black Present? Yes Present? Yes Present? ___ Present?
In this practical agar jelly cubes will be used to represent a cell. AIM: To model diffusion in a practical form and investigate the effect of surface area to volume ratio. HYPOTHESIS: It is hypothesised the smaller the cube the quicker and bigger the rate of diffusion will be and with a larger cube there will be a smaller percentage of diffusion due to its bigger volume.
Also, although this likely served no contribution in disheveling the results, using a stirrer of the same material to ensure the separate testing of each substance will be as uniform as
5 water bath were set up each to10 °C. (5 were used do the experiment faster) 5 cm3 of starch solution were added into the 5 test tubes that were labeled test tubes. Then 5 cm3 of amylase enzyme was added into the other 5 test tubes that were labeled. Put one of the starch solution test tube (preferably the one labeled 1) and one of the test tube containing amylase into the water bath (10 °C).
The hypothesis we came up with for this project was that in the distilled water there wouldn't be no change in the potato, we wouldn’t see a gain or loss with the water sitting in the beaker. The beaker with the 30% Sucrose and Distilled water we predicted that there was going to be weight gain to the potato. And for the distilled water with the 30% sucrose and we predicted weight loss. But the results came out to be the first bag content being isotonic the second bag came out to be hypotonic and lastly the result came out to be
The iodine test determines the presence of starch in biological materials. It is predicted that, if starch is not present, the solution with iodine remains yellow. However, if starch is present the solution with iodine becomes a blue-black colour. Plants have starch as the storage polysaccharide (glucose units held together by glycosidic bonds) while animals have the equivalent of glycogen. In this experiment, the dark blue colour is visible because of the helical amylose and amylopectin reacting with iodine (Travers et al., 2002).
5. Approaches to model cytoplasmic compartmentalization Cytoplasmic viscosity and hinderance to free diffusion has been modelled in three different ways: 5.1 Concentrated Macromolecular solution Early models assumed the cytosol to be an unstructured dense bag of macromolecules. In these cases, the tracer can essentially diffuse only within the space present between the macromolecules. The DCR (Diffusion Coefficient Ratio, η/ηο) for a tracer particle in a crowded solution will decrease with the tracer radius and will level off at the inverse of relative bulk viscosity (Graph I, Macromolecule Solution) (Luby-Phelps et al., 1988a).
The color of the beaker, which had the iodine didn’t have a purple/black color in the beaker indicating the starch didn’t diffuse through the membrane. The test strip changed color after gently swirling it in the beaker for 1 minute. This means that the glucose can diffuse through the membrane Reasoning: Diffusion is the transport of small particles
Membrane separation technologies are among the most promising processes in water purification regarding their low energy consumptions. Membrane distillation (MD) is a thermally driven separation process in which liquid feed is evaporated at the feed/membrane interface and is transported through a hydrophobic microporous membrane[1–4]. The hydrophobic character of the membrane allows only volatile components to enter the pores. The differences of the vapour pressures across the membrane is the driving force of the process[5,6].