What's the difference between hexamine and preservative?
Hexamine
Definition:
Example Sentences:
(1) Actinomycin inhibits Mbo I activity in the presence of cobalt hexamine but not in the absence.
(2) At temperatures of 200-300 degrees C hexamine decomposition is reported to produce mainly ammonia and formaldehyde.
(3) Knee joint menisci from osteoarthritic and rheumatoid knees were analyzed for nitrogen, collagen, non-collagenous proteins (NCP) and hexamine content.
(4) BZ-IV is equally digestible in the presence and absence of cobalt hexamine by Hha I, further indicating that the structure of BZ-IV is fully B-like under these conditions.
(5) The available literature on hexamethylenetetramine (hexamine) was reviewed with emphasis on its toxicology and epidemiology, its thermal decomposition and regulatory concerns related to its uses.
(6) Hexamine was also found in biological samples taken from victims of the Damascus attacks, and soil samples taken from the scene.
(7) In order to preserve and enhance the visibility of negatively charged tissue components, particularly the glycosaminoglycan-containing proteoglycans, the cationic stains ruthenium red (RR) and ruthenium hexamine trichloride (RHT) were used.
(8) At neutral pH in the presence of Co hexamine, both strands of the insert have modification maxima situated at one-third of the distance from both ends.
(9) Globule leucocytes in two goats were positive for argentaffin reaction with Gomori hexamine silver stain.
(10) Hexamine cobalt chloride (HCC) increases the efficiency of blunt end ligation by T4 DNA ligase about 50 fold.
(11) The kinetics of electron transfer between cytochrome-c oxidase and ruthenium hexamine has been characterized using the native enzyme or its cyanide complex either solubilized by detergent (soluble cytochrome oxidase) or reconstituted into artificial phospholipid vesicles (cytochrome oxidase-containing vesicles).
(12) Morphological examination of incubated tissue after fixation in the presence of ruthenium hexamine trichloride (RHT) (included to preserve PG in situ) revealed, however, that the PG staining profiles across cartilage matrix varied with the composition of the incubation medium used.
(13) Fixation with ruthenium hexamine trichloride (RHT) and embedding in LR White served to preserve chondrocytes in the expanded state and matrix proteoglycans were observed as a reticular network of filaments.
(14) The effect of the simultaneous administration of hexamine mandelate and methionine on the urinary excretion of calcium, magnesium and phosphate is reported in 3 groups of paraplegic patients.
(15) Although hexamine produces a positive Ames test, most animal studies have shown hexamine to be of very low genetic risk even in very high doses.
(16) A new method for morphological diagnosis of various forms of amyloidosis based on the use of a hot buffered hexamine-silver solution is suggested.
(17) The results of gel mobility studies in the absence and presence of cobalt hexamine indicate that a B-Z junction corresponds to a stiff bend of the helix axis, with two or more conformers accessible at the junction site.
(18) The studies reviewed are in general agreement that hexamine thermal decomposition in the temperature range of 300-800 degrees C is characterized by an increase in HCN and a decrease in NH3 emissions with increasing temperature.
(19) With pentaethylene hexamine, when used alone, it is possible to create a linear pH 4-10 interval, provided the molarity ratios are altered in the two chambers of the gradient mixer.
(20) The effectiveness of hexamine as an antibacterial agent has been attributed to its slow hydrolysis to ammonia and formaldehyde.
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.