(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.
Preservative
Definition:
(a.) Having the power or quality of preserving; tending to preserve, or to keep from injury, decay, etc.
(n.) That which preserves, or has the power of preserving; a presevative agent.
Example Sentences:
(1) "As the investigation remains live and in order to preserve the integrity of that investigation, it would not be appropriate to offer further comment."
(2) Under blood preservation conditions the difference of the rates of ATP-production and -consumption is the most important factor for a high ATP-level over long periods.
(3) In hypophysectomized rats the activity of alanine aminotransferase was increased, but its normal zonation (predominance in the periportal zone) was preserved.
(4) In this study, a potassium nitrate-polycarboxylate cement was used as a liner and was found clinically to tend to preserve pulpal vitality and significantly eliminate or decrease postoperative pain.
(5) Using serial section electron microscopic reconstructions as a reference, we have chosen as our standard procedure a method that maximizes both the preservation of the cytoskeleton and the proportion of cells staining, while minimizing the degree of nonspecific staining.
(6) A conduit of a diameter of 23 mm was made by hand with a glutaraldehyde preserved xenopericardial graft.
(7) Preservation of dopaminergic and H1 neurotransmission, probably within the blood barrier, is needed to allow the neuroendocrine transduction of cholinergic inputs, whereas the role of 5-HT neurotransmission remains uncertain.
(8) The combination vaccine consisted of 12 Lf tetanus toxoid and 10 TCID50 vaccinia virus "MVA" preserved with gelatine and glucosamine.
(9) Coup leader Captain Amadou Sanogo on Friday pleaded for foreign help to preserve the territorial integrity of the former French colony, a major gold and cotton producer.
(10) During the last 10 years 94% of patients have been normocalcaemic postoperatively, thanks mainly to the re-implantation of autologous parathyroid tissue, preserved by low-temperature storage.
(11) This study demonstrated that significant global and regional ventricular dysfunction develops immediately after removal of the papillary muscles, whereas myocardial contractility is preserved in patients undergoing mitral valve repair.
(12) Formation of the functional contour plaster bandage within the limits of the foot along the border of the fissure of the ankle joint with preservation of the contours of the ankles 4-8 weeks after the treatment was started in accordance with the severity of the fractures of the ankles in 95 patients both without (6) and with (89) dislocation of the bone fragments allowed to achieve the bone consolidation of the ankle fragments with recovery of the supportive ability of the extremity in 85 (89.5%) of the patients, after 6-8 weeks (7.2%) in the patients without displacement and after 10-13 weeks (11.3%) with displacement of the bone fragments of the ankles.
(13) 27% of the neurons revealed high sensitivity to the temperature stimulus with coefficient Q10 from 2.4 to 30; 6% of the neurons reacted by the on-response type; 5% of the neurons changed their activity and preserved the new level.
(14) Because isosmolar albumin solution is easier to prepare than hyperosmolar cryoprecipitated plasma and gives comparable results, it remains our perfusate of choice for continuous perfusion preservation.
(15) The advantages of the incision through the pars plana ciliaris are (1) easier approach to the vitreous cavity, (2) preservation of the crystalline lens and an intact iris, and (3) circumvention of the corneal and chamber angle complications sometimes associated with the transcorneal approach.
(16) In this material the ultrastructural details are very poorly preserved.
(17) Knee preservation is an important factor for better rehabilitation.
(18) The results of our utilization review were conveyed to local hospitals and the blood supplier in an effort to preserved donor blood.
(19) An effective gonadal shield should reduce the gonadal dose to a level low enough to preserve spermatogenesis in most patients.
(20) Osteomalacia is characterized by large osteoid seams and a preserved volume of bone trabeculae.