Search results
Results from the WOW.Com Content Network
The process uses a mixture of nitric acid and sulfuric acid to convert cellulose into nitrocellulose. [2] [irrelevant citation] The quality of the cellulose is important. Hemicellulose, lignin, pentosans, and mineral salts give inferior nitrocelluloses. In precise chemical terms, nitrocellulose is not a nitro compound, but a nitrate ester.
The chemical structure is not well understood, but it is determined that it is one molecule of camphor for each unit of glucose. After the mixing, the mass is pressed into blocks at a high pressure and then is fabricated for its specific use. [18] Nitrating cellulose is an extremely flammable process in which even factory explosions are not ...
Cellulose is used to make water-soluble adhesives and binders such as methyl cellulose and carboxymethyl cellulose which are used in wallpaper paste. Cellulose is further used to make hydrophilic and highly absorbent sponges. Cellulose is the raw material in the manufacture of nitrocellulose (cellulose nitrate) which is used in smokeless gunpowder.
The straight shape allows the molecules to pack closely. Cellulose is very common in application due to its abundant supply, its biocompatibility, and is environmentally friendly. Cellulose is used vastly in the form of nano-fibrils called nano-cellulose. Nano-cellulose presented at low concentrations produces a transparent gel material.
Other cellulosome systems (such as those from Acetivibrio cellulolyticus and Ruminococcus flavefaciens) appear to be even more intricate. The cellulosome consists of a multi-functional, integrating scaffoldin subunit, responsible for organizing the various cellulolytic subunits (e.g., the enzymes) into the complex.
In 1846, Louis-Nicolas Ménard and Florès Domonte discovered that cellulose nitrate could be dissolved in ether. [1] They devised a mixture of ether as the solvent and ethanol as a diluent that rendered cellulose nitrate into a clear gelatinous liquid. Collodion was first used medically as a dressing in 1847 by the Boston physician John Parker ...
Nitrocellulose slides are used mainly in proteomics to do protein microarrays with automated systems that print the slides and record results. Microarrays of cell analytes, arrays of cell lysate, antibody microarrays, tissue printing, [1] [2] immunoarrays, etc. are also possible with the slide.
Nitric oxide is a cell signaling molecule produced by many cells of the body, and growing evidence suggests that the biological actions of the endocannabinoid system (ECS) may, in part, be mediated through its ability to regulate the production and/or release of nitric oxide. [82]