Sam Gorman

Estimate pI for an amino acid or sequence, then check net charge at your chosen pH with clear assumptions and pKa options.

Convert assay data to enzyme activity, U/mL, specific activity, kat, and nkat using product or absorbance data.

Fit a linear calibration curve from standards, calculate an unknown concentration, and check residuals and extrapolation.

Estimate uncalibrated radiocarbon age from carbon-14 left, percent modern carbon, or activity ratio, with BP and year display.

Find liquid ethylene density from temperature and pressure or from mass and volume, with state checks and unit conversions.

Calculate double bond equivalent from a molecular formula or atom counts, with steps and plain-English meaning.

Calculate degree of unsaturation from a molecular formula or atom counts. See atom counts, shown work, and formula checks.

Convert nitrogen to crude protein or switch crude protein between as-fed and dry matter basis for feed and forage analysis.

Balance complete combustion equations and find O2, air, CO2, H2O, and heat from fuel moles or grams.

Calculate stoichiometric air, actual air, lambda, and dry or wet flue-gas composition from fuel analysis and excess air.