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R
H
mass transport resistance at the interface on F side (s
m
-1
)
R
K
thermodynamical mass transport resistance (s
m
-1
)
t
time (s)
u
dimensionless concentration (-)
V
molar volume (m
3
)

Greek Letters
equivalent transport property (defined in eq. 22)
activity coefficient
density (kg
m
-3
)

Special Symbols
a, b
statistical parameters related to the distribution of q (table 4)
BC
boundary condition
cdf
cumulative density function
eq
equilibrium
F
food product
f
q
density of probability of q
i
index
j
layer index
m
coordinates index (0=cartesian, 1=cylindrical and 2=spherical)
P
packaging material
pdf
probability density function
q
any physical quantity
q*
dimensionless value of q
q
likely estimate of q
q
estimated value of q
q
max
maximum value of q
q
min
minimum value of q
SML specific migration limit
s
q
shape distribution parameter of q