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  2. Formaldehyde - Wikipedia

    en.wikipedia.org/wiki/Formaldehyde

    Molecular formaldehyde. A colorless gas with a characteristic pungent, irritating odor. It is stable at about 150 °C, but it polymerizes when condensed to a liquid. 1,3,5-Trioxane, with the formula (CH 2 O) 3. It is a white solid that dissolves without degradation in organic solvents. It is a trimer of molecular formaldehyde.

  3. Embalming chemicals - Wikipedia

    en.wikipedia.org/wiki/Embalming_chemicals

    Formaldehyde or glutaraldehyde fixes tissue or cells by irreversibly connecting a primary amine group in a protein molecule with a nearby nitrogen in a protein or DNA molecule through a -CH 2 - linkage called a Schiff base. The end result also creates the simulation, via color changes, of the appearance of blood flowing under the skin.

  4. Methanediol - Wikipedia

    en.wikipedia.org/wiki/Methanediol

    Methanediol, also known as formaldehyde monohydrate or methylene glycol, is an organic compound with chemical formula CH 2 (OH) 2. It is the simplest geminal diol . In aqueous solutions it coexists with oligomers (short polymers).

  5. Intercalation (biochemistry) - Wikipedia

    en.wikipedia.org/wiki/Intercalation_(biochemistry)

    The degree of unwinding varies depending on the intercalator; for example, ethidium cation (the ionic form of ethidium bromide found in aqueous solution) unwinds DNA by about 26°, whereas proflavine unwinds it by about 17°. This unwinding causes the base pairs to separate, or "rise", creating an opening of about 0.34 nm (3.4 Å).

  6. Intramolecular force - Wikipedia

    en.wikipedia.org/wiki/Intramolecular_force

    This is a ball and stick model of a water molecule. It has a permanent dipole pointing to the bottom left hand side. In a true covalent bond, the electrons are shared evenly between the two atoms of the bond; there is little or no charge separation. Covalent bonds are generally formed between two nonmetals.

  7. Hi-C (genomic analysis technique) - Wikipedia

    en.wikipedia.org/wiki/Hi-C_(genomic_analysis...

    Formaldehyde can react with macromolecules in two steps: first it reacts with a nucleophilic group on a DNA base for example, and forms a methylol adduct, which is then converted to a Schiff base. [15] In the second step, the Schiff base, which can decompose rapidly, forms a methylene bridge with another functional group on another molecule. [15]

  8. DNA - Wikipedia

    en.wikipedia.org/wiki/DNA

    DNA nanotechnology is the field that seeks to design nanoscale structures using the molecular recognition properties of DNA molecules. [178] DNA nanotechnology uses the unique molecular recognition properties of DNA and other nucleic acids to create self-assembling branched DNA complexes with useful properties. [179]

  9. Nucleic acid double helix - Wikipedia

    en.wikipedia.org/wiki/Nucleic_acid_double_helix

    At least three DNA conformations are believed to be found in nature, A-DNA, B-DNA, and Z-DNA. The B form described by James Watson and Francis Crick is believed to predominate in cells. [27] It is 23.7 Å wide and extends 34 Å per 10 bp of sequence. The double helix makes one complete turn about its axis every 10.4–10.5 base pairs in solution.