from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white solid polymer of formaldehyde, (HCHO)n, where n is at least 6, used as a disinfectant, fumigant, and fungicide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A solid oligomer of formaldehyde that is used as a fumigant, and as a fixative in histology
from the GNU version of the Collaborative International Dictionary of English
- n. A polymer of formaldehyde obtained as a white crystalline substance by concentration of a formaldehyde solution. Formula (CH20)n. It dissolves in hot water with the release of formaldehyde, and is used as a disinfectant.
from The Century Dictionary and Cyclopedia
- n. A polymerized formaldehyde, (CH2O)n + H2O, formed by evaporation of an aqueous solution of formaldehyde. It is an amorphous solid that dissolves gradually in water. By heating with water at 130° C. it is reconverted to formaldehyde. It is used as an antiseptic.
Sorry, no etymologies found.
- a 24-hour process called paraformaldehyde decontamination that involves locking down the lab.
Researchers at The University of Hong Kong found that disinfectants like bleach, ethanol, phenol, formaldehyde and paraformaldehyde can kill the virus, the W.H.O. said.
In addition to formaldehyde, paraformaldehyde, trioxymethylene, methylal, hexamethylene-tetramine, and other substances containing a reactive methylene group, as well as acetaldehyde, benzaldehyde and other aldehydes may be employed to induce reaction.
The slurry was subjected to paraformaldehyde (1%) for microbial inactivation.
Slices were incubated in oxygenated ACSF for one hr and were then fixed in a solution containing 4% (wt/vol) paraformaldehyde in 100 mM phosphate buffer (pH 7.5) overnight at 4°C.
The eyes were then removed, immersed in 2% paraformaldehyde for one hour, infiltrated with sucrose, embedded in OCT and cut in sequence 10 µm horizontal sections apart on a cryostat.
Differences were considered to be significant at Animals were perfused with PBS first, followed by 2% paraformaldehyde.
Samples were then fixed with paraformaldehyde in 100 mM phosphate buffer pH 7.4 for 20 min, washed with PBS and blocked with PBS 3% (w/v) BSA, 1%
Eyes were fixed in 2% paraformaldehyde for 30 minutes, and then retinal whole mount was prepared as above and examined under a confocal microscope.
Mixtures of paraformaldehyde + glutaraldehyde reduced average centroid sizes by 2-3%.