491
number flux [Equation 10.3 on page 367]
jqcharge flux, (charge per time per area) [Equation 11.8 on page 418].jq,irepresents
that part of the flux carried by ions of typei. jq,r(x), total charge flux across an
axon’s membrane (radial direction) at locationx[Section 12.1.3], considered to be
positive when positive ions move outward.
jQflux of thermal energy [Section 4.6.4 on page 127]
jvvolume flux [Equation 7.15 on page 229]
KMMichaelis constant for an enzyme [Equation 10.20 on page 381]
Kthe constant 1/ln 2 [Equation 6.1 on page 175]
Keqdimensionless equilibrium constant of some chemical reaction [Section 8.2.2 on page
265];Kˆeq,dimensional form [Section 8.4.2 on page 279]
Kw,ion product of water [Equation 8.24 on page 272]
kBBoltzmann constant;kBTthermal energy at temperatureT;kBTrthermal energy at
room temperature [Equation 1.12 on page 23]
kspring constant [Equation 9.11 on page 310];kttorsional spring constant [Problem 9.9]
krate constant (probability per time) for a chemical reaction [Section 6.6.2 on page 194]
LsegEffective (Kuhn) segment length of a polymer modeled as a freely-jointed chain
[Equation 9.34 on page 340]
Lpfiltration coefficient [Section 7.3.2 on page 228]
BBjerrum length in water [Equation 7.21 on page 234]
Nornnumber of things
Nmole,the dimensionless number 6. 0 · 1023 (Avogadro’s number) [Section 1.5.1 on page
20]
Pprobability
Ppermeability [Equation 4.20 on page 121];Pw,towater;Ps,tosome solute
Pmembrane permeability matrix [Section 7.3.1′on page 249]
ppressure
pmomentum
Qvolume flow rate [Equation 5.17 on page 160]
Qheat (transfer of thermal energy) [Section 6.5.3 on page 189];Qvapheat of vaporization
of water [Problem 1.6]
qelectric charge [Equation 1.9 on page 18]
Relectrical resistance
RGradius of gyration of a polymer [Section 4.3.1 on page 110]
RReynolds number [Equation 5.11 on page 150]
Sentropy [Section 6.2.2 on page 177]
ssedimentation time scale [Equation 5.3 on page 143]
Tabsolute (Kelvin) temperature (unless otherwise specified). In illustrative calculations
weoften use the valueTr≡ 295 K(“room temperature”).
Ttransfer matrix [Section 9.4.1 on page 313]
Upotential energy, for example gravitational
uspeed of a molecule, also written|v|
ustretch (extensional deformation) of a rod [Section 9.1.2 on page 302]
V,vvolume
V(x), electric potential atx[Equation 1.9 on page 18];V 1 ,potential outside a cell;