def example_dilute_to_required_mass_concentration() -> None:
"""Dilute a given amount of source material to solution of the required size
10mg to 120ug/ul"""
original_mass = parse("10mg")
target_conventration_by_mass = parse("120ug/ul")
required_volume = original_mass / target_conventration_by_mass
print(f"Required diluting agent volume is {required_volume}")
def example_dilute_to_required_molar_concentration() -> None:
"""5mg powder to 20mM"""
powder_mass = parse("5mg")
target_dilution = parse("20mM")
powder_molecular_weight = parse("544.43g/mol")
powder_mols = powder_mass / powder_molecular_weight
diluting_agent_volume = powder_mols / target_dilution
print(
f"The required diluting agent volume is {diluting_agent_volume.as_units('ul')}"
)
def example_compare_solutions_strength() -> None:
"""Convert 5 ug/ul to mM and compare with a 20mM solution"""
solution1_concentraion_by_mass = parse("5ug/ul")
solution2_molar_concentration = parse("20mM")
molecular_weight = parse("544.43g/mol")
solution1_molar_concentration = solution1_concentraion_by_mass / molecular_weight
sol2_to_sol1_concentraion_ratio = (solution2_molar_concentration /
solution1_molar_concentration)
if solution1_molar_concentration > solution2_molar_concentration:
print("Solution 1 is stronger!")
else:
print("Solution 2 is stronger!")
print(
f"Solution 2 is {solution2_molar_concentration - solution1_molar_concentration} mM over solution 1"
)
print(
f"Solution 2 [20mM] is {sol2_to_sol1_concentraion_ratio} as strong as solution 1 [5ug/ul]"
)
def test_parse_complex_units() -> None:
_jA = parse("jA")
assert repr(_jA) == "1jA"
_3p2jA = parse("(3+2.5j)A")
assert repr(_3p2jA) == "(3+2.5j)A"
def test_parse_vloat_units() -> None:
_2500ms = parse("2.5s")
assert _2500ms == Milliseconds(2500)
def test_prase_int_units() -> None:
_5m = parse("5m")
_25m2 = parse("25m^2")
assert repr(_5m) == "5.0m"
assert _5m * _5m == _25m2