The diffusion coefficient of a large protein molecule is found
to be 2.2×10-13 m2/s in the...
The diffusion coefficient of a large protein molecule is found
to be 2.2×10-13 m2/s in the water at 20∘C.
Assuming it is spherical with a density of 1.3×103
kg/m3, compute its molar mass.
1) The diffusion coefficient of the protein BSA in water at 25°C
is 6.7 10-11 m2s-1. Calculate the
hydrodynamic volume of this protein assuming it can be regarded as
a sphere
Vh =
2) The molecular weight of BSA is 66,430 g/mol, and its partial
specific volume (the inverse of the density) is 0.734
cm3/g. What is the volume of one “dry” molecule of BSA?
(i.e. the unhydrated protein)
V =
1. If the oxygen diffusion coefficient in tissue is assumed to
be 1.1x10-5 cm2/s and fluid velocity is 1 mm/s, how large a
distance between capillaries is required for convection to play an
equally significant role as diffusion? Assuming an average distance
between capillaries of 100 mm, does convection play a significant
role? Use Peclet number to justify answers.
Given: M1= 75kg; M2 = 50kg; V (M1) = 10 m/s North; V (M2) = 10
m/s West
Action: Collision, two masses stick together, move at
unspecified angle in M2's initial direction
Question: Find magnitude of their speed together after
collision.
A liquid (ρ = 1000 kg/m3; μ = 2 × 10–2 N ∙ s/m2; v = 2 × 10–5 m2/s) flows tangentially past a flat plate with total length of 4 m (parallel to the flow direction), a velocity of 1 m/s, and a width of 1.5 m. What is the skin friction drag (shear force) on one side of the plate?
The steady-state diffusion flux through a metal plate is 5.4 x 10-10 kg/m2 s at a temperature of 827 °C (1100 K) and when the concentration gradient is -350 kg/m4 . Calculate the diffusion flux at 1027 °C (1300 K) for the same concentration gradient and assuming an activation energy for diffusion of 150,000 J/mol.
Calculate the heat-removal factor for a collector having an
overall heat loss coefficient of 10 W/m2 K and constructed of
copper fins and tubes (k = 390 W/m?K). Tube-to-tube center distance
is 12 cm, fin thickness is 0.05 cm, tube diameter is 1.5 cm, and
fluid-tube heat transfer coefficient is 1000 W/m2K. The cover
transmittance to solar radiation is 0.8 and is independent of
direction. The solar absorptance of the absorber plate is 0.9, the
collector is 1 m wide...
What is the Spike protein found in the SARS-CoV-2 virus?
Describe the structure of the S protein (quaternary, tertiary,
secondary and primary protein layers). Also highlight key domains
and features of the structure of the S-protein that are important
for its function.
Analyze the assertions and principles of Scripture found in
Ecclesiastes 5:10-11, Luke 3:13-14, Philippians 4:10-13, and 1
Timothy 6:1-16. How do these passages apply to economics? How do
they affect and impact a Christian understanding of economics? 250
words or more
Naphthalic acid, a large organic molecule, is found to have the
following composition: C, 66.67%;H, 3.73%;O, 29.60% by mass.
Determine the empirical formula of this compound.
B. Given that the molar mass of naphthalic acid is 216g/mol,
what is the compound's molecular formula?