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  2. Molecular biology - Wikipedia

    en.wikipedia.org/wiki/Molecular_biology

    The term 'molecular biology' was first used in 1945 by the English physicist William Astbury, who described it as an approach focused on discerning the underpinnings of biological phenomena—i.e. uncovering the physical and chemical structures and properties of biological molecules, as well as their interactions with other molecules and how ...

  3. Kilocalorie per mole - Wikipedia

    en.wikipedia.org/wiki/Kilocalorie_per_mole

    The kilocalorie per mole is a unit to measure an amount of energy per number of molecules, atoms, or other similar particles. It is defined as one kilocalorie of energy (1000 thermochemical gram calories) per one mole of substance. The unit symbol is written kcal/mol or kcal⋅mol −1. As typically measured, one kcal/mol represents a ...

  4. List of unsolved problems in biology - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    RNA folding problem: Is it possible to accurately predict the secondary, tertiary and quaternary structure of a polyribonucleic acid sequence based on its sequence and environment? Protein design : Is it possible to design highly active enzymes de novo for any desired reaction?

  5. Molecule - Wikipedia

    en.wikipedia.org/wiki/Molecule

    Their valence bond treatment of this problem, in their joint paper, [18] was a landmark in that it brought chemistry under quantum mechanics. Their work was an influence on Pauling, who had just received his doctorate and visited Heitler and London in Zürich on a Guggenheim Fellowship .

  6. Mole (unit) - Wikipedia

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

    The International Bureau of Weights and Measures defined the mole as "the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon-12." Thus, by that definition, one mole of pure 12 C had a mass of exactly 12 g. [15] [5] The four different definitions were equivalent to within 1%.

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    help.aol.com/products/aol-webmail

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  8. Woman Scores Surprise Kitten at Taco Bell & Gives Him Most ...

    www.aol.com/lifestyle/woman-scores-surprise...

    It can be really heartbreaking to find a stray. Anything could happen to them! And while you might not be able to save every stray you find, sometimes the only thing you can do is make sure they ...

  9. Mole fraction - Wikipedia

    en.wikipedia.org/wiki/Mole_fraction

    It is a dimensionless quantity with dimension of / and dimensionless unit of moles per mole (mol/mol or mol ⋅ mol-1) or simply 1; metric prefixes may also be used (e.g., nmol/mol for 10-9). [5] When expressed in percent , it is known as the mole percent or molar percentage (unit symbol %, sometimes "mol%", equivalent to cmol/mol for 10 -2 ).

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