How to use ester in a sentence

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Sentence Examples The phosphoric or phosphonic acid ester formed with the enzyme is extremely stable and is hydrolyzed very slowly. An ester prodrug was shown to increase the bioavailability of MPA following oral administration. Cefuroxime axetil is the ester prodrug of cefuroxime sodium, suitable for oral administration. Inside is a solution of an oxalate ester and a fluorescent dye, as well as a smaller glass tube that contains hydrogen peroxide. The mixed ester, cellulose acetate butyrate, has better weatherabilitly and finds use as pipe and telephone housings. Important ester waxes include carnauba wax, lanolin, beeswax, and spermaceti. Instead, we started to look further afield at copper-based catalysts that had been rejected during the initial ester hydrogenation testwork. Previous studies have shown that ALA hexyl ester is more successful than ALA for photodetection of early malignant lesions in the bladder. The addition of this ester is recommended for consistently effective control. Among the other commonly encountered vinyl compounds are vinyl bromide, vinyl ester, vinyl acetate, and vinylbenzene. Cells were incubated in the presence of phorbol ester myristate to induce macrophage differentiation. Condensation of methanoic acid with ethanol will produce ethyl methanoate, an ester having the odor of rum. The footnote also stated that Hoffmann had arranged for several chemical derivatives of salicylic acid to be examined, not just its acetyl ester. This type of reaction gives as its product a beta ketonic ester, ketone, or nitrile and an alcohol. Thermolysis of such heterocyclic diethyl malonates results in the loss of one ester group by elimination of ethene and carbon dioxide. The ester functional group can also be split by ammonia to give amides and alcohols. Such hairs serve as a protective armor for plants because they secrete polyol ester chemicals that are deadly to certain insect pests. For example, the ester ethyl acetate is a very good solvent and is a major component in nail polish removers. Aspartame, a dipeptide of aspartic acid and a methyl ester of phenylalanine, is 200 times sweeter than sugar. An ester, methyl salicylate, familiar as oil of wintergreen, is also a phenolic compound. Show More Sentences This alcohol was then conjugated to one of the COOH groups of succinic acid, forming an ester linkage. The polymerization of an ester can produce a polyester, an artificial fiber that is used as a cotton substitute. The half-life of ecgonine methyl ester is four hours and benzoyl ecgonine is about 6 hours. The replacement of ethyl with phenyl in the sec-butyl ester group does not result in diastereoisomeric excess. The ester ethyl acetate can be produced using either an organic or inorganic acid. Geranylgeraniol is distributed as a pyrophosphate ester in the envelope and thylakoid membranes of chloroplasts. The members of this family hydrolyze sulfate ester bonds of a variety of compounds, including mucopolysaccharides, cerebrosides, and steroids. In this reaction, an ester joins with another ester, a ketone, or a nitrile. New case compositions ensure good combustibility and no residues even under extreme conditions while limiting migration of nitric ester from gun propellants. They are intermediates in such reactions as the change of a carboxylic acid to its next highest homologue or to a derivative of a homologous acid such as an ester or an amide. The saponification removes the methyl and phytol ester groups and may partially cleave the cyclopentenyl ring. Both types of reaction are reversible and produce an ester and water. The sealed bearings are filled with premium quality grease, with a polyurea thickener and synthetic ester base oil. Since benzonatate is chemically related to anesthetic agents of the para-amino benzoic acid class, the drug should not be used in patients allergic to ester type agents. The apo-carotenic ester content is determined by reference to an external standard. A retinoid compound of formula I or a nontoxic pharmaceutically acceptable salt, physiologically hydrolyzable ester or scivate thereof. Rosin acids are converted into ester gum by reaction with controlled amounts of glycerol or other polyhydric alcohols. It was moreover observed that the unavailability of oestradiol and its ester like derivates would have minimal economic effect. Based upon intravenous dosing of triamcinolone acetonide phosphate ester, the half-life of triamcinolone acetonide was reported to be 88 minutes. Use of a metal-filled, plateable structural adhesive for bonding cyanate ester composites together. Show More Sentences The reduced form is a thioether and is derived from cysteine, whereas the oxidized form is a sulphate ester and is derived from the sulphonation pathway. Chemical Principle: This test pad contains an indoxyl ester and diazonium salt. In mammalian peroxidases, the prosthetic group is deeply buried inside the bulk of the protein and is covalently linked to the apoprotein through ester bonds. In certain conditions, we found that the primary product formed when an alcohol was passed over these catalysts was the corresponding symmetrical ester. Temsirolimus was converted to sirolimus by a non-CYP450 dependent pathway, presumably via an esterase-mediated hydrolysis of the C42 ester bond. Nitrite is the univalent radical NO2 or a compound containing it, such as a salt or an ester of nitrous acid. Ethanol-free or alcohol-free composition comprising a hydrofluoro ether, characterized in that it comprises at least one polyacid ester. The activity of three formulations of MCPA, the acid form, the dimethylamine salt and the 2-ethyl hexyl ester have been investigated in several studies described herein. The complex combination of diglycerides of fatty acids linked to the choline ester of phosphoric acid. Oracle Dicamba Agricultural Herbicide can be used alone or in a tank-mix with 2,4 D amine or 2,4 D L. V. ester herbicide. So the ester formulation tends to be more volatile than the amine formulation. Triclopyr butoxyethyl ester, the active ingredient in Garlon 4, hydrolyzes to the herbicidallyactive product, triclopyr acid. In this conjugate, the free alcoholic hydroxy group on the vinca alkaloid-based antineoplastic drug was generated by hydrolysis of the original acetate ester. Trim Angles are manufactured of quality vinyl ester resin for use in highly corrosive conditions. Rescue boat 1815 is made of vinyl ester resin with fibreglass and a foam core. By placing hyaluronan ester film as Internal support, the predetermined shape of the chondrocyte macroaggregate can be well maintained. Glucono-delta-lactone is the cyclic 1,5-intramolecular ester of Dgluconic acid. Water, hydrate of white lime, titanium dioxide, mineral fillers, colophony glycerol ester as potassium soap, cellulose ether. It reacts with many metals and metalloids to form phosphides. Phosphorus atoms can bond with oxygen atoms to form ester groups. The resulting mixture was transferred into a separating funnel for glycerol and methyl ester separation. Show More Sentences Use of the isopropyl ester of GM1 ganglioside for the manufacture of a medicament for the treatment of the inflammatory and exudative components of nerve pathologies. Ethyleneglycol ester of montanic acid supplied by Hoechst Japan was used as a release agent. The ester oil used with the working fluid is biodegradable. In the indirect method, the alkene is converted to the sulfate ester, which is subsequently hydrolyzed. The obtained hyaluronic acid-cysteine ethyl ester was characterized in terms of degree of substitution, stability, mucoadhesive as well as mucoprotective and lubricative properties. The three classes of major phosphate ester plasticizers of importance in the rubber industry include triaryl, alkyl diaryl and trialkyl. Quantum chemical, spectroscopic and structural study of hydrochlorides, hydrogens squarates and ester amides of squaric acid of amina. May also contain aliphatic acyclic or alicyclic ester or acetal component. Hot distilled water is sprayed over the ester and stirred gently and allowed to settle in the separating funnel. Plasma cholesteryl ester transfer protein is lowered by treatment of hypercholesterolemia with cholestyramine. Hexabromocyclodecane and tetrabromobisphenol A-bis allyl ester and tribromophenol allyl ether recommended for expanded PS foam. However, the high viscosity of the conjugated environment and the depolymerisation reaction leading to the formation of the cyclic ester prevents the production of PLAs with high molecular weights. These are epoxy resins, bismaleimides, cyanate ester resins, and phenolic resins, then polybenzoxazines themselves. Water soluble algin fiber wherein the water soluble algin is one or two or more of sodium, lithium, potassium, magnesium and ammonium alginates, algin organic amine salts, and water soluble algin ester derivatives. Degradability can therefore be engineered into polymers by the addition of chemical linkages such as anhydride, ester, or amide bonds. The Accuprobe? system uses a chemiluminescent acridinium ester labelled, single-stranded DNA probe, that is complementary to the ribosomal RNA of the target organism. Process for the biocatalytic production of a peptide from an amino acid ester or a peptide ester and a C-terminally derivatised amino acid or a peptide fragment, characterised in that a zymogen is used as the biocatalyst. A sprayable dispersion containing an acrylic acid ester copolymer and a colloidal chloroprene polymerizate, characterized in that it contains boric acid. Its formula is composed of an extra gentle cleansing base of natural origin, disodium cocoyl glutamate is an amino acid ester derived from the coconut and sugar. Veterinarians predict an insignificant impact of future unavailability of oestradiol 17ß and its ester like derivates on farmers and on animal welfare. Show More Sentences A polymerizable composition of matter comprising a cycloaliphatic epoxy resin, a cyanate ester resin, and as a single initiator, a Bronsted acid, including a compound capable of generating a Bronsted acid. More than 1,000 compounds have been synthesized following the discovery that l-aspartyl-l-phenylalanine methyl ester, which subsequently became known as aspartame, was found to taste sweet. The resin can be a vinyl ester, epoxy, or polyester, while the reinforcement might be any one of a variety of fibres, ranging from glass through carbon, boron, and a number of proprietary types. The most common are known as polyester, vinyl ester, epoxy, phenolic, polyimide, polyamide, polypropylene, PEEK, and others. The thermosettable polymer compositions include a vinyl ester resin or an unsaturated polyester or blends and mixtures of those two materials. The substituted of octatomic ring was primarily ester in C-6, 9 positions, including angeloyl, benzoyl, acetyl, butanoyl, caproyl and so on. A newly published study furthers the exploration of caffeic acid phenethyl ester and its potential anticarcinogen and antioxidant properties. Look for ingredients like helichrysum italicum extract, teprenone, acetyl dipeptide-1 cetyl ester, and sea whip extract. Sulfate-free surfactants include the salts of methyl ester sulfonates and salts of sulfonated fatty acids. Pyropheophorbide a and pyropheophorbide methyl ester were photobleached in dimethylformamide upon illumination. Succinobucol, a potent lipophilic antioxidant, is the monosuccinic acid ester of probucol. Ethyl pyruvate, a simple aliphatic ester derived from pyruvic acid, is safer and more stable than pyruvate. Then the samples were treated with coating solutions consisting of chitosan, allyl isothiocyanate or lauric arginate ester. The monosaccharides are pre-column derivatized with 4-aminobenzoic acid ethyl ester by reductive amination to a secondary amine which absorbs at 306 nm. Indeed, as acid, ester, alcohol, and carbonate functions are available, transesterifications, alcoholysis, acidolysis, and carbonate-ester functions can happen. However, the ester bonds can be attacked by some nucleophiles. In ester compounds, positive response was found in males at 75 ppm and in nymphs at 200 ppm towards methyl octadecanoate and isopropyl myristate respectively. A releasing agent comprises a montanic acid complex acid ester. The basic C C bond-forming step involves the reaction of a lithiated carbamate with a boronic ester to give a homologated boronic ester with complete stereocontrol. New biocontrol coatings for fruit are being made of reformulated shellac and sucrose ester, a compound derived by combining sugar with a fatty acid. Show More Sentences Acetic Acid is an organic chemical mainly used for the production of Vinyl Acetate Monomer, Purified Terephthalic Acid, acetic anhydride, acetic ester and chloroacetic acid. Plenlizer ST-210, a polyol ester costabilizer for PVC resins, is used in conjunction with zinc stabilizer for improved heat stability and weatherability. Methyl ester sulfonate exhibits properties similar to linear alkylbenzene sulfonate, and is proving to be a fine replacement in a variety of formulations. Another competitor, methyl ester sulfonates, hasn't been able to maintain the threat level that was once feared, despite the start-up of several new units in Southeast Asia. Crocin is a digentibiosyl ester of the polyene dicarboxylic acid crocetin. Plenlizer ST-210 polyol ester costabilizer for PVC resins used in conjunction with zinc stabilizer for improved heat stability and weatherability. This radical is delocalized over the pentadiene structure and reacts with oxygen to produce the peroxy radical and conjugation in the fatty acid ester chain. Navy aircraft in 1978 was attributed to a silicate ester fire. After two dayes folowed ester, and the dayes of swete breed. Although the Longview site is its largest Texanol-producing facility, Eastman also manufactures ester alcohol at its locations In Jurong Island, Singapore, and Zibo, China. Ester and Edna spent some time in the dark grove gathering wood, and Rachel sparked a flint over dried leaves before the altar, and soon they created a bright little fire. Mrs Ester did not worry about gold. The quartz crushers were already more important. Ester linkages are much more chemically labile than the ether linkages. She uses the work of Cherrie Moraga, Ester Hernandez, and Marcia Ochoa to talk about cultural productions and the lesbianization of the heterosexual icons of popular culture. Examples from Classical Literature Caffeine, it will be remembered, is the methyl ester of theobromine, and can be prepared from it. The ether, on evaporation, left the ester which was crystallized from water and dried in a desiccator over sulphuric acid. The doctor checked her by a gesture, and motioned to ester to pause in her work. An action suitable for the purpose is the saponification of an ester, such as ethyl acetate. On the other hand, Harden and Young regard the acid as a diphosphoric ester of a hexose. Linalyl acetate, or artificial bergamot oil, is the ester formed when linalol is treated with acetic anhydride. It forms an addition product with acrylic ester, which on heating loses nitrogen and leaves trimethylene dicarboxylic ester. By heating with phosphorus pentachloride an alkyl group is eliminated and a chlorcarbonic ester formed. Its meythl ester, which can be formed from it, is codeine, one of the accompanying alkaloids of opium. The derivative is approximately a diacetate, and on the assumption of a simple ester reaction the yield should be 127 p.ct. These statistics confirm the evidence that the ester reaction is not simple. Luisa went back to the hall, where she found ester, the Professor, and Maria. It was the morning after you had told me that about ester Ried. It is one of the best suggestions that that dear ester has given us. Benzyl Acetate, the ester obtained from benzyl alcohol and acetic acid. In the example quoted, the ester corresponds to 17.6 per cent. Formic ester yields a secondary alcohol under similar conditions. Newcastle University history student Ester Pink discovered that pasties, a staple of the likes of North East bakers Greggs, are thriving thousands of miles away. Find more words! 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What is the adjective for ester? What is the noun for ester? Use our Sentence Generator Nearby Words Estelle Estella esteems esteeming esteemed esteem Ester esterase esterification esters Estes Esther 5-letter Words Starting With e es est este