do not answer with ai Derive the Gibbs-Thomson relation (Equation 1) between vapor pressure and the size of aspherical nanodroplet (pictorially, assume the nanodroplet is adhered to a solid surface).Equation 1: In (P)=2yvmRTrThe following will be helpful: AP = Pin - Pext = 2 and dGin = Vin dPin; dGext =Vext dPext

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Answered: Derive the Gibbs-Thomson relation…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Guanosine (C10H13N5O5) in solution has a maximum absorbance at a wavelength of 275 nm. The molar extinction co-efficient at this wavelength is 84M−1cm−1and the path length is 24.7 cm. Through the use of a spectrophotometer, it is found that the that A275= 1.48. What is the concentration of the guanosine solution in grams/litre? Molecular weights (g/mol): C-12, H-1, N-14, O-16 Select one: A. 0.201869 g/L B. 0.435188 g/L C. 0.059919 g/L D. 0.294046 g/L E. 0.000713 g/L
The protein calcineurin binds to the protein calmodulin with an association rate of 8.9 × 103 M−1 s −1 and an overall dissociation constant, Kd, of 10 nM. Calculate the dissociation rate, kd , including appropriate units.
Calculate the percentage of stated content in paracetamol tablets using the calbration curve given above and the following data: Data • Weight of 20 tablets¼12.2243 g • Weight of tablet powder taken¼152.5 mg • Stated content per tablet¼500 mg • Initial extraction volume¼200 ml. Dilution steps • 20 ml into 100 ml • 10 ml into 100 ml • Area of chromatographic peak for paracetamol extracted from the tablets¼44 519.
i) Write down the equation derived from your Excel generated standard curve and describe its components; ii) provide the values of the absorbance data of the unknown sample (do NOT show the absorbance data of the glycine standards). Show all details of the working out of your calculation. Indicate all units! Provide the answer with two decimals precision iii) state the answer in a full sentence. (note: avoid mathematical symbols [=, +, -, etc] in your answer sentence).
Predict the diffusivity of human serum albumin at 293 K in water as a dilute solution and compare it with experimental data. Assume the following: The molecular weight of human serum albumin, MA= 72,300 kg/kmol The viscosity of water at 293 K is 0.897 x 10-3 Pa∙s The experimental data value is 5.93 x 10-11 m2/s.
What is the chemistry principle behind when (treatment: heavy cream) is subjected to CHILLED TEMPERATURE? What is the effect in beating time, stability (%drain) and volume foam (specific gravity) is important? see the data below Treatment (Heavy Cream) Beating Time (min) Stability (%drain) Volume of Foam (Specific Gravity) (Room Temperature) 20 No drain 0.94 Heavy Cream (chilled) 20 No drain 0.76 Heavy Cream with sugar and vanilla 20 No drain 0.88 Heavy Cream (over-whipped) 25 No drain 0.83
The standard curve to determine the amount of betacyanin is shown below. You extracted a red pigment from a beet disc (the mass of a disc is 2 g) using 10 ml of 20% ethanol solution. You measured absorbance of the solution above the beet disc every minute for a total time of 20 minutes. The increase in absorbance was linear during a period of time from 1 min to 10 min. The absorbance at 10 min was 0.8. Calculate the amount of betacyanin extracted from 1g of a beet tissue per minute. Explain your calculations. You can use Excel or a calculator.
The isoelectric point of eIF4a is 5.02. Students are given a sample of cell lysate containing eIF4A at pH 7.4. They are also provided with two buffers of pH 7.4 to use for ion exchange chromatography. One buffer has a very high salt concentration (1 M), the other has a low salt concentration (0.1 M). Mariela decides to use an anion exchange column, while Ashok chooses a cation exchange column. Who made the better decision? Provide a detailed explanation of why one student will end up with a purer sample of eIF4A. Which buffer will you use while washing away impurities (high or low salt), and which would you use to remove eIF4A from the column? Explain your choice.
The material to be heated is in a long, cylindrical tube, and is viscous enough that any flow inside the tube can be ignored, i.e. the heating is by conduction alone). Also, consider the glass of the tube to be very thin so its thermal resistance can be ignored. The tube diameter is 1 cm and the properties of the material are the same those of water, given by 0.64 W/m*K, 1000 kg/m3, and 4180 J/kg*K, for thermal conductivity, density, and specific heat, respectively. The water bath temperature is 65 °C, and the initial temperature of the material is 27 °C. Without the agitation of the water bath, the heat transfer coefficient can be considered to be 128 W/m2*K. Considering the tube to be a long cylinder, how long does it take for the coldest point to heat up to a temperature corresponding to 99% of the total possible temperature increase? If the surrounding how water is agitated using a stirrer, leading to a considerably large surface heat transfer coefficient, how long does it…
at 257 nm) is dissolved in 2.5 mL of buffer. A 250 microliter aliquot is removed and placed in a 1.0 cm A sample of adenosine triphosphate (ATP) (MW 507, ɛ = 14,700 M'cm cuvette with sufficient buffer to give a total volume of 2.0 mL. The absorbance of the sample at 257 nm is 2.0. Calculate the weight of ATP in the original 2.5 mL sample. (Choose the correct value from the drop-down list provided. The values of weight are listed in units of milligrams.) Weight of ATP: v mg
What is the chemistry principle behind when (treatment: heavy cream) is subjected to room temperature? Why does beating time, stability (%drain) and volume foam (specific gravity) is important? see the data below Treatment (Heavy Cream) Beating Time (min) Stability (%drain) Volume of Foam (Specific Gravity) (Room Temperature) 20 No drain 0.94 Heavy Cream (chilled) 20 No drain 0.76 Heavy Cream with sugar and vanilla 20 No drain 0.88 Heavy Cream (over-whipped) 25 No drain 0.83
Calculate the extinction coeficcient where the concentration is in mg/ml and the path length is in cm. The molecular weight of A is 290 g/mol. Re calculate the extinction coefficient with the concentration in nM. Note the unit of the newly calculated extinction coefficient will contain a mM-1 term. Given: Concentration: 5 microgram path length: 1cm absorbance: 0.055

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Derive the Gibbs-Thomson relation (Equation 1) between vapor pressure and the size of a spherical nanodroplet (pictorially, assume the nanodroplet is adhered to a solid surface). Equation 1: In (P) = 2yvm RTr The following will be helpful: AP = Pin - Pext = 2 and dGin = Vin dPin; dGext = Vext dPext