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  2. Dalton (unit) - Wikipedia

    en.wikipedia.org/wiki/Dalton_(unit)

    As a consequence, the molar mass constant remains close to but no longer exactly 1 g/mol, meaning that the mass in grams of one mole of any substance remains nearly but no longer exactly numerically equal to its average molecular mass in daltons, [30] although the relative standard uncertainty of 4.5 × 10 −10 at the time of the redefinition ...

  3. Damköhler numbers - Wikipedia

    en.wikipedia.org/wiki/Damköhler_numbers

    The residence time scale can take the form of a convection time scale, such as volumetric flow rate through the reactor for continuous (plug flow or stirred tank) or semibatch chemical processes: D a I = reaction rate convective mass transport rate {\displaystyle \mathrm {Da_{\mathrm {I} }} ={\frac {\text{reaction rate}}{\text{convective mass ...

  4. Molecular mass - Wikipedia

    en.wikipedia.org/wiki/Molecular_mass

    The molar mass is defined as the mass of a given substance divided by the amount of the substance, and is expressed in grams per mol (g/mol). That makes the molar mass an average of many particles or molecules (potentially containing different isotopes), and the molecular mass the mass of one specific particle or molecule. The molar mass is ...

  5. Molecular weight cut-off - Wikipedia

    en.wikipedia.org/wiki/Molecular_weight_cut-off

    In ultrafiltration, the molecular weight cut-off or MWCO of a membrane refers to the lowest molecular weight of the solute (in daltons) for which 90% of the solute is retained by (prevented from passing through) the membrane, [1] or the molecular weight of the molecule (e.g. globular protein) that is 90% retained by the membrane.

  6. World’s oldest person Tomiko Itooka dies; Brazilian nun now ...

    www.aol.com/world-oldest-person-tomiko-itooka...

    Tomiko Itooka, a 116-year-old Japanese woman who became the oldest living person in August 2024, died on Dec. 29, 2024, according to Guinness World Records.

  7. Affibody molecule - Wikipedia

    en.wikipedia.org/wiki/Affibody_molecule

    A monoclonal antibody, for comparison, is 150 kDa, and a single-domain antibody, the smallest type of antigen-binding antibody fragment, 12–15 kDa. Affibody molecules have been shown to withstand high temperatures (90 °C (194 °F)) or acidic and alkaline conditions ( pH 2.5 or pH 11, respectively).

  8. Telltale Signs You Need to See a Doctor for Your Cough - AOL

    www.aol.com/telltale-signs-see-doctor-cough...

    Medical providers break down when to see a doctor for a cough.

  9. Elle a 'perfect addition' at new forever home after 1,000 ...

    www.aol.com/elle-perfect-addition-forever-home...

    Elle, a six-year-old boxer mix, finally found a loving home after being at an animal shelter in Texas for 1,400 days.