(n.) Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable.
Example Sentences:
(1) 10 aryl propylene oxides and 6 aryl butylene oxides were synthesized.
(2) We study the "suicide" phenomena as well as metabolic pathways of mixed acids (methyl red test, MR) and butylene glycol (Voges-Proskauer, VP), in 107 strains belonging to mesophilic Aeromonas group, isolated from stools.
(3) Several oligomers of poly(butylene tartrate)s were synthesized and their kinetic behavior was studied under acidic conditions.
(4) Three general test groups of volatile organic chemicals were identified by test data: chemicals which had boiling points below 63 degrees C, for which the vaporization technique was the most sensitive test procedure (ethylene, propylene, and butylene oxides and methylene chloride); chemicals which had boiling points from 107 degrees to 132 degrees C, for which the vaporization technique was still useful, but where sensitivity was only slightly increased over the preincubation technique (1-bromo-2-chloroethane, epichlorohydrin, and ethylene dibromide); and 3) a chemical which had a boiling point at 194 degrees C, where the preincubation technique was the most appropriate test method (styrene oxide).
(5) Thirty percent 1,3-butylene glycol and 30% propylene glycol were approximately as effective as 10% HG.
(6) This paper reports the identification of seven individual oligomers isolated from a poly(butylene adipate) plasticizer.
(7) The antimicrobial properties of three glycols, - propylene glycol, hexylene glycol, and 1,3-butylene glycol - against Candida albicans, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pyogenes A, Streptococcus mitis, and E. coli were studied in vitro.
(8) In contrast, 1,3-butylene glycol had no protective effects.
(9) Several oligomers of poly(butylene tartrate) were synthesized, and their kinetic behavior was studied under alkaline conditions.
(10) The concentration of butylene glycol obtained in the fermentation beer ranged from 2.3 to 4.4%.
(11) The film was made of polymer blends consisting of polypropylene, styrene ethylene butylene styrene-block copolymer, and ethylene ethylacrylate copolymer.
(12) The other short chain (C2 to C4) alkyldiols were separated by this method and did not interfere with the quantitation of 1,3-butylene glycol.
(13) A microanalytical method with direct on-column specimen injection for determination of 1,3-butylene glycol (1,3-butanediol) in whole blood or plasma using gas-liquid chromatography with flame ionization is described.
(14) However, all compounds were mutagenic in at least one system with the propylene oxides being more mutagenic than the corresponding butylene oxide derivatives.
(15) The biodegradability of three aliphatic adipic acid diesters and a 1,3-butylene glycol adipic acid polyester was determined in acclimated, activated sludge systems.
(16) GC analysis of epichlorohydrin and butylene oxide concentrations within Tedlar bags suggested that these two chemicals volatilized and were contained in the media after 1 hr of incubation at 37 degrees C. The mutagenic activity of six volatile liquid mutagens was similar in single and triple plate Tedlar bags.
(17) The results speak in favour of using hexylene glycol in cosmetic and dermatological vehicles instead of propylene glycol and 1,3-butylene glycol.
(18) The method described is suitable for the rapid detection of potentially toxic blood or plasma levels of 1,3-butylene glycol, as well as for the detection of other short chain glycols.
(19) Maximal production of butylene glycol with minimal residual sugar was obtained with a medium consisting of molasses, diluted to 20 degrees Brix, and 0.4% urea.
(20) Lard, medium chain triglycerides, or 1,3-butylene glycol comprised 43% of the diet fed to mice.
Polymer
Definition:
(n.) Any one of two or more substances related to each other by polymerism; specifically, a substance produced from another substance by chemical polymerization.
Example Sentences:
(1) Five days later, the animals were randomly assigned to one of four treatment groups: Group 1 received intracranial implantation of controlled-release polymers containing dexamethasone; Group 2 received intraperitoneal implantation of controlled-release polymers containing dexamethasone; Group 3 received serial intraperitoneal injections of dexamethasone; and Group 4 received sham treatment.
(2) In spite of important differences in size, chemical composition, polymer density, and configuration, biological macromolecules indeed manifest some of the essential physical-chemical properties of gels.
(3) The acetonitrile extract is concentrated and analyzed by HPLC, using a new polymer-based column, and detected by UV spectroscopy at 270 nm.
(4) These results suggest that glomerular IgA are IgA polymers and decreased hepatic clearance of hepatic IgA polymers may be responsible for the glomerular deposition of IgA.
(5) A method for the introduction of side chains containing isonitrile (isocyanide, functional group) on the backbone of polysaccharides and other hydroxylic polymers was developed.
(6) He knows polymer notes from travels in Australia, where they were first introduced in 1988, and he wants Britain to "move with the times" too.
(7) Poly(ortho ester) bioerodible polymers are suitable materials for the topical administration of a wide variety of therapeutic agents; varying the nature and amounts of excipients physically incorporated into the polymer will vary the erosion rates from a few hours to many months.
(8) By performing countercurrent distribution in the presence of a polymer-ligand, the protein that binds the polymer-ligand can be separated from a heterogenous mixture.
(9) Pulse labeling of the polymer with [2-3H]adenosine was also maximal at the same time points.
(10) Charged polymers, known to alter cell surface characteristics, reversibly inhibit the intercellular communication required in kidney tubule induction.
(11) A novel type of ion exchanger was prepared by multipoint covalent binding of polystyrene chains onto the surface of porous silica followed by polymer-analogous modification of the bonded layer.
(12) Another 52 received a 100-g (nonfasting) glucose polymer screening test followed by a 100-g glucose polymer tolerance test.
(13) The important role of the exocellular polymers for the structure, size and density of flocs can be well illustrated.
(14) A small number of children with protracted diarrhoea, who have severe mucosal injury may not be able to handle even starch and may require diets based on short chain glucose polymers.
(15) Rather, assembly of sIgM into polymers and their subsequent secretion are prevented in B lymphocytes by preceding targeting of monomeric sIgM to degradation.
(16) The neutral polymer was devoid of type 6 activity although it was serologically active.
(17) The tissue reaction was more severe for polymers having a higher rate of degradation.
(18) Control experiments with other constructs (e.g., allopurinol riboside linked to the mannose-free polymer) confirmed that the enhancement of activity was indeed achieved by means of the mannose homing device.
(19) Of the tested polymers, only polyvinyl methylacetamide and dextran inhibit a decrease in the level of mitochondrial enzyme activity which develops with administration of endotoxin.
(20) At different degrees of DNA damage, the average length of the poly-ADP-ribose chain did not practically alter, thus suggesting the increase in the number of polymer binding sites in the histones.