What's the difference between dimethoxymethane and formaldehyde?
Dimethoxymethane
Definition:
Example Sentences:
(1) The compounds are N-methoxymethylated or N-ethoxymethylated using phosphorus pentoxide and dimethoxymethane or diethoxymethane, respectively, in a chlorinated solvent.
(2) It consists of extraction of aflatoxins from the sample with methanol, treatment of the residue with a mixture of dimethoxymethane-methanol (4+1) to further precipitate proteins, evaporation of dimethoxymethane followed by a liquid-liquid defatting with hexane and heating of the methanol-water mixture before the transfer of aflatoxins into chloroform.
Formaldehyde
Definition:
(n.) A colorless, volatile liquid, H2CO, resembling acetic or ethyl aldehyde, and chemically intermediate between methyl alcohol and formic acid.
Example Sentences:
(1) At the light-microscopic level, adrenergic fibres were identified due to their formaldehyde-induced fluorescence.
(2) Alcohol oxidase and catalase, which catalyse the oxidation of methanol to formaldehyde in Candida boidinii, could be localized within the peroxisomes.
(3) These results suggest that formaldehyde has tumor-promoting activity in carcinogenesis in the glandular stomach.
(4) Colitis was induced in the distal colon by rectal infusion of formaldehyde solution, followed by an intravenous bolus of soluble immune complexes.
(5) The variables tested were: formaldehyde concentration, pH, time, and temperature.
(6) In the scope of our research about the antimicrobial activity of aldehyde-amin-condensates a number of partly new unsymmetrically substituted animals was synthesized by reaction of formaldehyde with different secondary amines.
(7) The fluorescence anisotropy changes observed in A-1 (H1N1) influenza and Sendai parainfluenza viruses in aqueous suspensions when formaldehyde (0.1 to 1.0 p.c.)
(8) Similar results were obtained when hybrid-selected RNA, which had been labeled for 3 h with [3H]uridine, was analyzed on formaldehyde-agarose gels, suggesting that the observed differences were due to splicing rather than RNA stability.
(9) The relative toxicities of formaldehyde and glutaraldehyde to the rat nasal epithelium were determined following intra-nasal instillation of aqueous solutions of these compounds into one nostril of male Fischer 344 (F-344) rats.
(10) When tissue metabolism was irreversibly inhibited by exposure to formaldehyde, hydrogen ion concentration and pCO2 were significantly decreased in the mucosal side of the chamber compared with the viable gall bladder.
(11) Whereas the diagnosis unequivocally could be established by semithin sections the diagnosis was doubtful using material fixed with Bouin's solution and overlooked when the material was fixed with 4% formaldehyde solution.
(12) Key intermediate of the synthesis was 2-formyl-estradiol (2) which was prepared in quantitative yield through reaction of the phenoxymagnesium bromide of estradiol with formaldehyde in the presence of HMPA.
(13) In 139 persons occupationally exposed to compounds of chromium, formaldehyde and p-phenylenediamine lymphocytic transformation test (ltt) was performed to detect a delayed-type hypersensitivity.
(14) Microwave fixation in dilute aldehyde solution has been reported to be superior to fixation in formaldehyde for the preservation of antigens.
(15) Isolated nuclei from green leaf tissue of tomato plants infected with potato spindle tuber viroid (PSTVd) were bound to microscope slides, fixed with formaldehyde and hybridized with biotinylated transcripts of cloned PSTVd cDNA.
(16) Adverse reactions to phenol-formaldehyde resins include depigmentation, irritant dermatitis, chemical burns and allergic contact dermatitis.
(17) The merits of formaldehyde, formaldehyde-glutaraldehyde combinations, and glutaraldehyde in phosphate buffers have been compared as fixatives that will give easy and satisfactory preservation of tissues for routine automated histologic processing and yet keep them suitable for electron microscopical studies after prolonged storage at room temperature.
(18) The optimum hybridization procedure was found to be incubation of serum samples with salt, NaOH, formaldehyde and detergent, followed by spot application of the samples.
(19) A mixture of 4% formaldehyde and 0.5% glutaraldehyde gave the best combination of ultrastructural preservation and retention of enzyme activity.
(20) In second group after thoracotomy the lungs were stabilized with gelatin-resorcin-formaldehyde glue.