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A prominent example is the bacterial mesosome, which was thought to be an organelle in gram-positive bacteria in the 1970s, but was later shown by new techniques developed for electron microscopy to be simply an artifact of chemical fixation. [2] [3] Standardization of fixation and other tissue processing procedures takes this introduction of ...
Paraformaldehyde can be depolymerized to formaldehyde gas by dry heating [2] and to formaldehyde solution by water in the presence of a base, an acid or heat. The high purity formaldehyde solutions obtained in this way are used as a fixative for microscopy and histology. The resulting formaldehyde gas from dry heating paraformaldehyde is flammable.
A saturated water solution, of about 40% formaldehyde by volume or 37% by mass, is called "100% formalin". A small amount of stabilizer, such as methanol, is usually added to suppress oxidation and polymerization. A typical commercial-grade formalin may contain 10–12% methanol in addition to various metallic impurities.
C 5 H 6 O 2: furfuryl alcohol: 98-00-0 C 3 H 8 O 3: glycerol: 56-81-5 CH 3 OH: methanol: 67-56-1 CH 3 N(C 2 H 4 OH) 2: methyl diethanolamine: 105-59-9 CH 3 NC: methyl isocyanide: 593-75-9 C 5 H 9 NO: N-Methyl-2-pyrrolidone: 872-50-4 CH 3 CH 2 CH 2 OH: 1-Propanol: 71-23-8 CH 2 (CH 2 OH) 2: 1,3-Propanediol: 504-63-2 HOCH 2 CH 2 CH 2 CH 2 CH 2 OH ...
This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.
Cooling baths are generally one of two types: (a) a cold fluid (particularly liquid nitrogen, water, or even air) — but most commonly the term refers to (b) a mixture of 3 components: (1) a cooling agent (such as dry ice or ice); (2) a liquid "carrier" (such as liquid water, ethylene glycol, acetone, etc.), which transfers heat between the ...
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
2,2-Dimethoxypropane (DMP) is an organic compound with the formula (CH 3) 2 C(OCH 3) 2. A colorless liquid, it is the product of the condensation of acetone and methanol. DMP is used as a water scavenger in water-sensitive reactions. Upon acid-catalyzed reaction, DMP reacts quantitatively with water to form acetone and methanol. [2]