Homework Answers
From the graph shown above it can be said that-
- These could be the data points from the 'control' tubes.
For absorbance experiments, it is always recommended to have standards. Thus this graph can be of standards. Data points may correspond to the progression of experiment of different concentrations of reagens in increasing or decreasing order.
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absorbance These could be the data points from the "control" tubes. These could be the "E"...
From Hung et al., (2017) “Purification,characterization and biological effect of lectin from the marine sponge Stylissa...
From Hung et al., (2017) “Purification,characterization and biological effect of lectin from the marine sponge Stylissa flexibilis (Lévi, 1961)” Specimens were cut into small pieces, ground with a mixer machine and extracted (1:2, w/v) with 50 mM Tris–HCl, 150 mM NaCl buffer (pH 7.5) for 6 h at 4 °C. After filtration through a cheese cloth, the filtrate was centrifuged at 3500 × g for 30 min at 4 °C. To the supernatant, cold absolute ethanol (− 20 °C) was...
Procedure: 1. 10 Test tubes were labelled (0C,0E,15C,15E,30C,30E,45C,45E,60C, and 60E.) 2. 2 mL cathecol-buffer at pH...
Procedure:
1. 10 Test tubes were labelled
(0C,0E,15C,15E,30C,30E,45C,45E,60C, and 60E.)
2. 2 mL cathecol-buffer at pH 6 was added into each test
tubes.
3. 3.5 mL of water was added into all of the C tubes
(0C,15C,30C,45C, and 60C.)
4. 3 mL of water was added into the remaining tubes.
5.The two tubes were put into an ice bath.
6. 0.5 mL of enzyme polyphenoloxidase was added into tube E when
the mixture had reached certain T (O°C)
7.The transmittance...
The following data points were obtained from an experimental test
The following data points were obtained from an experimental testIf it is known that the relationship between s and t is of the form t = C1ec2s determine the constants C1 and C2 by curve fitting the above function to the data. Note: First, you will need to write the equation in a linear form.
What control elements regulate expression of the mPGES-1 gene? The promoter of a gene includes the...
What control elements regulate expression of the mPGES-1 gene? The promoter of a gene includes the DNA immediately upstream of the transcription start site, but expression of the gene can also be affected by control elements. These can be thousands of base pairs upstream of the promoter, grouped in an enhancer. Because the distance and spacing of these control elements make them difficult to identify, scientists begin by deleting sections of DNA that contain possible control elements and measuring the...
. Determination of an equilibrium constant Use the calculated absorbance values from Table 4 in Part...
. Determination of an equilibrium constant Use the calculated absorbance values from Table 4 in Part II (y values and the best-fit line equation from Part I to calculate the [FeSCN2"), at equilibrium. Show two sets of calculations and complete Table 6 below. Sample Calculation with hypothetical values of Absorbance from Table 4 & fitted egn. from Table 3 y = mx + b (y is absorbance) 0.0620 - 2000x -0.0250 x-0.0620+ 0.0250 2000 = 4.35 x 10 с D...
If you worked in a group of 3, you will only have 3 pennies in this table. If you did not work in a group of 3, you will have up to 5 samples from sharing data with another group. Either way, inc...
If you worked in a group of 3, you will only have 3 pennies in this table. If you did not work in a group of 3, you will have up to 5 samples from sharing data with another group. Either way, include all pennies here (do not use a Q-test to discard any values), Table 11-2. Experimental and calculated values from penny samples. (5 points) : Sample Absorbance (AU) | Amount of Copper (g) % Copper o.14 0.32 0.4s...
Table 1; of absorbance vs. concentration on a graph sheet (use pencil, properly amylase from two...
Table 1; of absorbance vs. concentration on a graph sheet (use pencil, properly amylase from two sources as samples (unknowns) were also treated in d. The experimental set-up of Table 1, indicate whether it was derived using serial e. In Table 2, considering the original salivary amylase samples, which one of the b. Plot curve labeled graph will be noted or generate an excel-sheet): Use graph to extrapo late the unknowns and determine their concentrations; e. Salivary the same protocol...
2K2Cr2O7 + 8H2SO4 + 3C2H5OH = 2Cr2(SO4)3 + 2K2SO4 + 3CH3COOH + 11H2O A=ebc A=absorbance e=molar...
2K2Cr2O7 + 8H2SO4 + 3C2H5OH = 2Cr2(SO4)3 + 2K2SO4 + 3CH3COOH + 11H2O A=ebc A=absorbance e=molar absorptivity b=path length of light through the cell c=concentration of solution in moles per liter A1/A2=C1/C2 A1= absorbance of known solution c1=concentration of known solution A2=absorbance of unknown solution C2=concentration of unknown. 0.25MG ethanol = 0.10%BAC Operating wavelength : 441 nm Absorbance of solution 1 - Standard Dichromate-H2O : 0.533 a.u. Absorbance of solution 2 - Standard Dichromate-Ethanol (Standard) : 0.422 a.u. Absorbance of...
2. A common situation that arises when we collect experimental data is that a simple curve can be fitted through a selection of data points when we only have a small data sample, but as we continue to...
2. A common situation that arises when we collect experimental data is that a simple curve can be fitted through a selection of data points when we only have a small data sample, but as we continue to collect further data, we can no longer fit the data exactly and must instead look for a curve of best fit. Consider, for instance, the equation y = 6 − 9x + 3x 2 and the data points (0, 6), (1, 0)...
Requirement d. For each control, list a specific misstatement that could result from the absence of...
Requirement d. For each control, list a specific misstatement that could result from the absence of the control. (Use each letter corresponding to a specific misstatement only once.) (Click the icon to view the misstatements likely to result from the absence of the controls.) i Misstatements due to absence of the control A fictitious payroll check could be processed for a fictitious employee if invalid employee numbers J. are included in the employee master file. A fictitious payroll check could...
Procedure:
1. 10 Test tubes were labelled
(0C,0E,15C,15E,30C,30E,45C,45E,60C, and 60E.)
2. 2 mL cathecol-buffer at pH 6 was added into each test
tubes.
3. 3.5 mL of water was added into all of the C tubes
(0C,15C,30C,45C, and 60C.)
4. 3 mL of water was added into the remaining tubes.
5.The two tubes were put into an ice bath.
6. 0.5 mL of enzyme polyphenoloxidase was added into tube E when
the mixture had reached certain T (O°C)
7.The transmittance...
. Determination of an equilibrium constant Use the calculated absorbance values from Table 4 in Part II (y values and the best-fit line equation from Part I to calculate the [FeSCN2"), at equilibrium. Show two sets of calculations and complete Table 6 below. Sample Calculation with hypothetical values of Absorbance from Table 4 & fitted egn. from Table 3 y = mx + b (y is absorbance) 0.0620 - 2000x -0.0250 x-0.0620+ 0.0250 2000 = 4.35 x 10 с D...
If you worked in a group of 3, you will only have 3 pennies in this table. If you did not work in a group of 3, you will have up to 5 samples from sharing data with another group. Either way, include all pennies here (do not use a Q-test to discard any values), Table 11-2. Experimental and calculated values from penny samples. (5 points) : Sample Absorbance (AU) | Amount of Copper (g) % Copper o.14 0.32 0.4s...
Table 1; of absorbance vs. concentration on a graph sheet (use pencil, properly amylase from two sources as samples (unknowns) were also treated in d. The experimental set-up of Table 1, indicate whether it was derived using serial e. In Table 2, considering the original salivary amylase samples, which one of the b. Plot curve labeled graph will be noted or generate an excel-sheet): Use graph to extrapo late the unknowns and determine their concentrations; e. Salivary the same protocol...
Requirement d. For each control, list a specific misstatement that could result from the absence of the control. (Use each letter corresponding to a specific misstatement only once.) (Click the icon to view the misstatements likely to result from the absence of the controls.) i Misstatements due to absence of the control A fictitious payroll check could be processed for a fictitious employee if invalid employee numbers J. are included in the employee master file. A fictitious payroll check could...
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