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What indication do the experimental results give regarding the purity of the samples used?
Wiki User
∙ 8y ago
After a detailed chemical analysis the purity is correctly evaluated.
Wiki User
∙ 8y ago
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Why do you need a molecular weight ruler alongside your samples during electrophoresis?
A molecular weight ruler uses a sample of fragments of a known size (known as a molecular weight marker) to be placed alongside the experimental and control samples. It helps compare the migration distance of the experimental fragments to the migrating distance of the fragments of a known size that make up the molecular weight marker. Then the scientist can calculate an approx. size of their experimental samples.
Why is it important to determine the melting ranges for the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
What is the purpose of test tubes in the lab?
To carry out specific reactions as in a chemistry lab. But these are also used in collecting blood samples for more research regarding the same.
Why might the results you obtain from your soil show low amounts of nitrite and high amounts of nitrate?
It is possible to have differing results over several areas. Several samples should be taken, especially if the area is large (like a farm field or very large garden).
Why do you assay your samples in triplicate?
assaying in triplicate is a measure of control, to highlight anomalous results. You are more likely to have a reliable result if you have three conclusive sets of data rather than one set.
What indication do the experimental result give regarding the purity of the samples used?
After a detailed chemical analysis the purity is correctly evaluated.
What is the difference between experimental replicates and experimental controls?
Replicates are "repeat" samples under a given condition.
The procedure designed to ensure that the experimental and control groups do not differ in any way that might affect thee experiment's results is called?
random assignment Random assignment ensures that bias does not cause differences in representative samples divided into experimental and control groups.
What is the difference between control samples and test experimental samples?
It calculates the difference between each set of pairs, and analyzes that list of differences. The P value answersthis question: If the median difference in the ... If your samples are small and there are no tied ranks, Prism calculates an ... The whole point of using a paired test is to control for experimental.
Why do you need a molecular weight ruler alongside your samples during electrophoresis?
A molecular weight ruler uses a sample of fragments of a known size (known as a molecular weight marker) to be placed alongside the experimental and control samples. It helps compare the migration distance of the experimental fragments to the migrating distance of the fragments of a known size that make up the molecular weight marker. Then the scientist can calculate an approx. size of their experimental samples.
Why is it important to determine the melting ranges of the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
Why is it important to determine the melting ranges for the impure and recrystallized samples of vanillin?
The melting point is an indication of purity.
What is the use of bioassay test panels?
Bioassay test panels includes a tested series of frequently requested samples or disease state samples with healthy controls to do comparitive experimental research.
Why do too densely coloured samples fail to give proper results using spectrophotometer?
Because we measure transmittance in spectrophotometer and for densely coloured samples transmittance will be very less. So we will not get proper results for absorbance.
What is the color changed for positive results in every samples in millon test?
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Why are controls necessary when performing biochemical test?
Control samples are samples that someone has specifically created to have know concentrations of the compound(s) of interest. This includes blank samples with zero concentration. The Controls are mixed in with the real samples so the analyst does not know which are which. The analyses are conducted by standard methods and the results reviewed. If the work is done properly the values for the controls will be the same or within an expected range of variance as the known concentrations. The values of the real samples are then likely to be correct. This is a quality control or quality assurance procedure. Alternately the same samples can be sent out to a number of labs (Real and control samples). The results should be consistent. This procedure would identify labs that have consistently higher results for all samples. This process is called Round Robin testing
What does control as an experiment means?
A control sample or control group is used to compare with the experimental group or sample. The control sample ideally, should be exactly the same as the experimental sample except that you don't give your experimental treatment to the control sample. Afterwards you compare the 2 samples to see if your experimental treatment had any kind of effect. The control is like a reference point.
