PLANT BIOPHYSICS - Y. I. Posudin - 2004

Symbol

Name

Value and units

с

Speed of light in vacuum

2,99792458·10⁸ м·с^-1

N_a

Avogadro constant

6,0221367(36)·10²³ (моль)^-1

R = N_A·k

Universal gas constant

8,3145510(70) Дж·моль^-1·К^-1;

8,314·10^-3 л·МПа·моль^-1·К^-1

k = R/N_a

Boltzmann constant

1,380658(12)·10^-23 Дж·К^-1

кТ

Boltzmann constant · Temperature

0,0235 еВ at 0 °С

0,0253 еВ at 20 °С

RT

Universal gas constant · temperature

2,271·10³ Дж·моль^-1 at 0 °С;

2,437·10³ Дж·моль^-1 at 20 °С.

е

Elementary charge

1,60217733(49))·10^-19 Кл

ε₀

Electric constant

8 8541878(17)·10^-12Кл²·Н^-1·м^-2

μ₀

Magnetic constant

12,56637614·10^-7 Н·А^-2

F = N_A·e

Faraday constant

9,64846·10⁴ Кл·моль^-1

RT/F

25,3 мВ at 20 °С

2,303RT/F

58.2 мВ at 20 °С

h

Planck constant

6,626075(40)·10^-34 Дж·с

h = h/2π

Planck constant

1,05457266(63)·10^-34 Дж·с

σ

Stefan-Boltzmann constant

5,67051(19)·10^-8 Вт·м^-2·К^-4

В

Wien displacement law constant

0,002897756 м·К

Multiplier

Prefix

Symbol

Multiplier

Prefix

Symbol

10¹⁸

exa

E

10^-1

deci

d

10¹⁵

peta

P

10^-2

centi

c

10¹²

tera

T

10^-3

milli

m

10⁹

giga

G

10^-6

micro

μ

10^б

mega

M

10^-9

nano

n

10³

kilo

k

10^-12

pico

p

10²

hecto

h

10^-15

femto

f

10¹

deca

da

10^-18

atto

a

Quantity

Unit of measurement

Dimension

Relationship between units in different systems

Work A, energy E

Joule (J)

кг·м²·с^-2

1 J = 10⁷ erg

Power N

Watt (W)

кг·м²·с^-3

1 W = 1 J·с^-1;

Force F

Newton (N)

кг·м·с^-2

1 hp = 735.5 W

1 N = 1 J·м^-1;

Pressure p

Pascal (Pa)

кг·м^-1·с^-2

1 N = 10⁵ dyn

1 Pa = 1 N·м^-2;

1 Pa = 9,87·10^-6 atm;

1 Pa = 7,5·10^-3 mmHg;

1 atm = 1,013·10⁵ Pa;

1 mmHg = 133 Pa;

1 Pa = 10^-5 bar;

1 bar = 10⁵ Pa;

1 mbar = 100 Pa;

1 Torr = 133 Pa;

1 hPa = 100 Pa;

1 N·м^-2 = 1,02·10^-7 кг·мм^-2;

1 кг·мм^-2 = 0,98·10⁷ N·м^-2;

1 кг·мм^-2 = 10² кг·см^-2;

1 кг·см^-2 = 0,98·10⁵ N·м^-2;

1 atm = 14.696 psi;

1 psi = 1 lb/in²;

1 N/m² = 0.145·1 lb/in²;

1 кг·м^-3 = 10^-3 г·см^-3;

1 г·см^-3 = 10³ кг·м^-3

Density ρ

кг·м^-3

кг·м^-3

Quantity

Unit of measurement

Dimension

Relationship between units in different systems

Temperature t°

Degrees Celsius °C

°C = K - 273.15

K = °C + 273.15

°C = (°F - 32) × 5/9

°F = 9/5 × °C + 32

K = (°F - 32) × 5/9 + 273.15

°F = (K - 273.15) × 9/5 + 32

Heat Q

Joule (J)

кг·м²·с^-2

1 J = 0.2389 cal;

1 cal = 4.186 J;

1 J = 10⁷ erg;

1 erg = 10^-7 J

Enthalpy H

kJ·mol^-1

10³·кг·м²·с^-2·моль^-1

Entropy S

J·K^-1

кг·м²·с^-2·К^-1

Heat capacity C

J·K^-1

кг·м²·с^-2·К^-1

Specific heat capacity c

J·kg^-1·K^-1

м²·с^-2·К^-1

Molar specific heat capacity C/p

J·mol^-1·K^-1

Thermal conductivity coefficient λ

W·m^-1·K^-1

кг·м·с^-3·К^-1

Thermal diffusivity coefficient X

м²·с^-1

Viscosity η

Pa·s

кг·м^-1·с^-1

1 poise = 0.1 Pa·s

Quantity

Unit of measurement

Dimension

Relationship between units in different systems

Electric charge q

Coulomb (C)

кг^-2·м^-2·с^-1

1 C = 1 A·s

Electric displacement D

C·m

А·с·м^-2

Potential φ, voltage U

Volt (V)

кг·м²·A^-1·с^-3

1 V = 1 J·C^-1

EMF ε, current I

Ampere (A)

A

1 A = 1 C·s^-1

Current density j

A·m^-2

А·м^-2

Capacitance C

Farad (F)

кг^-1·м^-2·A²·с⁴

1 F = 1 C·V^-1

Electric dipole moment p

C·m

А·с·м

Electric field strength E

V·m^-1

кг·м·A^-1·с^-3

Resistance R

Ohm (Ω)

кг·м²·A^-2·с^-3

1 V·m^-1 = 1 N·C^-1

Electrical resistivity ρ

Ohm·m

кг·м³·A^-2·с^-3

Magnetic flux Φ

Weber (Wb)

кг·м²·A^-1·с^-2

Magnetic induction B

Tesla (T)

кг·A^-1·с^-2

1 T = 1 Wb·m^-2

1 T = 10⁴ Gs

1 Gs = 10^-4 T

Magnetic field strength H

A·m^-1

А·м^-1

Inductance L

Henry (H)

кг·м²·A^-2·с^-2

Quantity

Unit of measurement

Dimension

Relationship between units in different systems

Wavelength of light λ

m

м

1 m = 10⁶ μm;

1 μm = 10^-6 m;

1 m = 10⁹ nm;

1 nm = 10^-9 m;

1 m = 10¹⁰ Å;

1 Å = 10^-10 m

Wavenumber σ

m^-1

м^-1

1 m^-1 = 10^-2 cm^-1;

1 cm^-1 = 10² м^-1

Energy of a single quantum E

(1.240/λ) eV

1 eV = 1.60210·10^-19 J

Energy of a mole of quanta E

einstein

ейнштейн

1 einstein = 12·10⁷ J

Radiometric quantity

Unit of measurement

Photometric quantity

Unit of measurement

Radiant flux Φ_е

Watt (W)

Luminous flux Φ_с

Lumen (lm)

Radiant intensity І_е

Watt per steradian (W·sr^-1)

Luminous intensity І_с

Candela (cd) = (lm·sr^-1)

Radiance L_e

Watt per steradian square meter (W·sr^-1·m^-2)

Luminance L_с

Candela per square meter (cd·m^-2)

Irradiance Е_е

Watt per square meter (W·m^-2)

Illuminance Е_с

Lux (lx) = (lm·m^-2)

Radiant exitance М_е

Watt per square meter (W·m^-2)

Luminous exitance М_с

Lumen per square meter (lm·m^-2)

Incident photon flux density, І_ф

μmol·m^-2·s^-1

Radiant flux

Luminous flux

1 W = 0.27 lm (λ = 400 nm)

1 lm = 1.464·10^-3 W (λ = 555 nm)

= 25.9 lm (λ = 450 nm)

= 220.0 lm (λ = 500 nm)

= 679.0 lm (λ = 550 nm)

= 683.0 lm (λ = 555 nm)

= 430.0 lm (λ = 600 nm)

= 73.0 lm (λ = 650 nm)

= 2.78 lm (λ = 700 nm)

1 lm·s = 1.464·10^-3 J (λ = 555 nm)

Irradiance

Luminance

1 W·cm^-2 = 1·10⁴ W·m^-2 = 6.83·10⁶ lx (λ = 555 nm)

1 lm·sr^-1·m^-2 = 1·10^-4 lm·sr^-1·cm^-2

Radiant intensity

Luminous intensity

1 W·sr^-1 = 683 cd (λ = 555 nm)

1 lm·sr^-1 = 1.464·10^-3 W·sr^-1 (λ = 555 nm)

A α

alpha

I ι

iota

P ρ

rho

B β

beta

К κ

kappa

Σ σ

sigma

Г γ

gamma

Λ λ

lambda

Т т

tau

Δ δ

delta

М μ

mu

Y v

upsilon

E ε

epsilon

N v

nu

Ω ω

omega

Ф φ

phi

O о

omicron

Ξ ξ

xi

X χ

chi

П п

pi

Ψ ψ

psi

H η

eta

Θ θ

theta

Z ς

zeta

A a

a

J j

jodh

S S

es

В b

be

К k

ka

Т t

te

C c

ce

L l

el

U u

u

D d

de

М m

em

V v

ve

E e

e

N n

en

W w

double u

F f

ef

O о

o

X х

ex

G g

ge

Р р

pe

Y у

ipsilateral

H h

aitch

Q q

cu

Z z

zed

I і

i

R r

er