(n.) A white crystalline substance obtained by oxidation of piperic acid, and regarded as a complex aldehyde.
Example Sentences:
(1) The procedure has been adapted to the analysis of other products including domestic vanilla extracts and imitation vanilla flavorings for vanillin, ethyl vanillin, 4-hydroxybenzaldehyde and piperonal.
(2) piperonylic acid, piperonyl alcohol, piperonal and vanillic acid were identified in the free form in 0-96 h urine whereas only piperic acid was detected in 0-6 h bile.
(3) 8-Butyl-8-azabicyclo[3.2.1]octan-3-one was condensed with selected tolualdehydes, methoxybenzaldehydes and chlorobenzaldehydes, as well as with piperonal, furfural, dimethylaminobenzaldehyde, 3-pyridine-carboxaldehyde and 4-pyridine-carboxaldehyde.
(4) Piperonal was used to verify the method and to show that precision and accuracy were not affected by the volatility of the cyclohexane.
Powder
Definition:
(n.) The fine particles to which any dry substance is reduced by pounding, grinding, or triturating, or into which it falls by decay; dust.
(n.) An explosive mixture used in gunnery, blasting, etc.; gunpowder. See Gunpowder.
(v. t.) To reduce to fine particles; to pound, grind, or rub into a powder; to comminute; to pulverize; to triturate.
(v. t.) To sprinkle with powder, or as with powder; to be sprinkle; as, to powder the hair.
(v. t.) To sprinkle with salt; to corn, as meat.
(v. i.) To be reduced to powder; to become like powder; as, some salts powder easily.
(v. i.) To use powder on the hair or skin; as, she paints and powders.
Example Sentences:
(1) Sift the cocoa powder over the top and lightly but thoroughly fold it in with the metal spoon.
(2) Thus, enhancers are required to obtain significant nasal absorption of glucagon and calcitonin and powders and spray solutions did not differ in terms of systemic availability.
(3) On the other hand, immunofluorescence in anterior pituitary cells was faint and detected in only 2 of 28 patients with Graves' disease (7.1%) after absorption of their sera with rat liver aceton powder.
(4) High intensity ultrasound also enhances the heterogeneous catalysis of alkene hydrogenation by Ni powders.
(5) Rat heart acid acetone powder was subjected to ion exchange chromatography on CM-cellulose.
(6) The conformational similarity between tubules, sheets, and the dry powder is corroborated by calorimetry, which reveals a cooling exotherm at the same temperature where tubules form upon cooling hydrated sheets.
(7) Eight patients were seen within 15 minutes of intranasal self-administration of large amounts of pure D-lysergic acid diethylamide (LSD) tartrate powder.
(8) As soon as the component with the lower mechanical stability is percolating the powder system, tablet hardness is controlled entirely by this component.
(9) During powder compaction on a Manesty Betapress, peak pressures, Pmax, are reached before the punches are vertically aligned with the centres of the upper and lower compression roll support pins.
(10) Plasma cholesterol concentrations in F1b-generation rats were elevated, but cocoa powder did not affect this parameter consistently across multiple generations.
(11) In a trial with rams, application of polyethylene powder (PE) as a marker for determination of feed passage rate through the digestive tract and three methods of its determination in feed and feces were tested.
(12) Physical and technological parameters of carfecillin powder and carfecillin with auxiliary substances in the form of the powder mixture and granulate were studied comparatively.
(13) Treatment animals had the anastomoses and graft sealed with a suspension of N-butyl-2-cyanoacrylate and 1.2 g tobramycin powder (antibiotic glue, ANGL) after contamination.
(14) A suspension of 0.6 mg polyvinyl alcohol foam powder per milliliter of normal saline was found to be optimum.
(15) The allogenic implantation of demineralized bone powder induces the formation of new bone tissue or osteoneogenesis.
(16) The ICSAs were significantly absorbed with mouse islet cells but hardly absorbed with spleen cells or liver powder.
(17) Thus, with elution by either ATP or pyrophosphate, actin has been purified in one step from extracts of acetone-dried muscle powder.
(18) An analysis of variance of saliva levels and urinary excretion as well as an analysis of variance of peak concentration and the area under the curve from 0 to 24 hr for the saliva levels showed no significant difference between the powder and products, but a significant difference between subjects.
(19) In contact toxicity tests with water dispersible powder deposits on plywood, propoxur was highly active initially but lost its effectiveness after only a few weeks, whereas tetrachlorvinphos was less active initially but more persistent.
(20) Completely demineralized root powder was subjected to solutions of varying pH and ionic strength: (a) 0.1 M acetic acid, pH 4.0, (b) 0.1 M acetic acid + 0.15 M KCl, pH 4.0, (c) 0.1 M Hepes, pH 7.0 or to (d) 0.1 M Hepes + 0.15 M KCl, pH 7.0 at 37 degrees C. The surfaces of intact root specimens were exposed to 0.1 M acetic acid, pH 4.0 (which resulted in erosive lesions) or to 0.1 M lactic acid, 0.2 mM methane hydroxy diphosphonate, pH 5.0 (which produced subsurface lesions) at 37 degrees C. After incubation, the extracts were analysed for soluble collagen and the insoluble matrices were treated with trypsin at 15 degrees C to determine the denatured collagen.