abstract：:A spectrodensitometric assay was developed for propranolol based on measurement of the absorbance of the drug on silica gel plates irradiated at 822 nm. Quantities as low as 0.10 microgram can be detected, and a linear relationship was obtained between 0.010 and 0.400 microgram. The percent recovery from plasma spiked...

journal_title：Journal of pharmaceutical sciences

authors： Hadzija BW,Mattocks AM

更新日期：1978-09-01 00:00:00

abstract：:A high-pressure liquid chromatographic method for the sensitive, rapid, and specific determination of sulfapyridine and its N-acetyl derivative in plasma and saliva was developed. A cyano-bonded, reversed-phase, high efficiency column was used. The system detected these sulfonamides in serum to 0.25 mg/liter and withi...

journal_title：Journal of pharmaceutical sciences

authors： Owerbach J,Johnson NF,Bates TR,Pieniaszek HJ Jr,Jusko WJ

更新日期：1978-09-01 00:00:00

abstract：:To prepare (+)-tubocurine and O,O-dimethyl-(+)-tubocurine, the commonly used dequaternization procedures with sodium theophenoxide and ethanolamine were investigated. The quaternary compounds were (+)-tubocurarine chloride and the chloride and iodide salts of O,O-dimethyl-(+)-chondocurarine. The results obtained with ...

journal_title：Journal of pharmaceutical sciences

authors： Naghaway JA,Soine TO

更新日期：1978-09-01 00:00:00

abstract：:An automated potentiometric procedure was used for studying in vitro dissolution kinetics of acidic drugs. Theoretical considerations indicated that the pH-stat method could be used to establish approximate sink conditions or, possibly, a perfect sink. Data obtained from dissolution studies using the pH-stat method we...

journal_title：Journal of pharmaceutical sciences

authors： Underwood FL,Cadwallader DE

更新日期：1978-08-01 00:00:00

abstract：:The extent of formation of solasodiene from solasodine upon treatment with hydrochloric acid under various conditions was determined. The diene formed was assayed by using the characteristic extinction at 236 nm. Diene formation was effected by the acid concentration and the boiling point of the solvent used. Optimal ...

journal_title：Journal of pharmaceutical sciences

authors： Segal R,Breuer A,Milo-Goldzweig I

更新日期：1978-08-01 00:00:00

abstract：:Methods for monitoring mechanical events occurring within particulate solids systems in a dynamic state are described. The electrical conductance and capacitance characteristics of such systems, as they relate to the degree of bed dilation or expansion, extent of interparticulate contact, and intensity of particle mot...

journal_title：Journal of pharmaceutical sciences

authors： Rippie EG,Kriesel DC,Rettig H

更新日期：1978-08-01 00:00:00

abstract：:A highly sensitive and specific electron-capture GLC assay capable of detecting picogram quantities of metoclopramide, a procaine derivative, in biological fluids was developed. This assay consisted of extracting metoclopramide from an alkalinized aqueous layer into benzene. A portion of the organic phase was derivati...

journal_title：Journal of pharmaceutical sciences

authors： Tam YK,Axelson JE

更新日期：1978-08-01 00:00:00

abstract：:Nadolol was extracted from tablet excipients with an acidic potassium chloride solution. The drug was oxidized with periodic acid, and the resulting aldehyde was reacted with 2,4-dinitrophenylhydrazine to form the corresponding hydrazone. Excess reagent was removed with a cupric chloride solution. The hydrazone was ex...

journal_title：Journal of pharmaceutical sciences

authors： Ivashikiv E

更新日期：1978-07-01 00:00:00

abstract：:Samples of ethacrynic acid were treated with methanol-hydrochloric acid or with diazomethane. GLC and mass spectrometric analysis indicated that the methanol-hydrochloric acid reaction gave the expected methyl ester, whereas diazomethane treatment gave a compound containing an additional 14 mass units. Accurate mass m...

journal_title：Journal of pharmaceutical sciences

authors： Midha KK,Hubbard JW,Charette C,Jun HW

更新日期：1978-07-01 00:00:00

abstract：:The reaction kinetics of blue tetrazolium with selected arylhydrazines were investigated under pseudo-first-order conditions. The reaction rate constants were obtained at various temperatures, and the enthalpy (8.4-11.2 kcal/mole) and entropy (-38--45 eu) of activations were calculated. A Hammett plot yielded a straig...

journal_title：Journal of pharmaceutical sciences

authors： Biehl ER,Wooten R,Kenner CT,Graham RE

更新日期：1978-07-01 00:00:00

abstract：:Plasma levels were determined frequently after single doses of perfluorooctyl bromide were administered to beagle dogs at doses of either 30.8 g/kg po or 3.9 g/kg intratracheally. The apparent first-order half-life during the terminal elimination phase was about 1 day after oral medication and about 7 days after intra...

journal_title：Journal of pharmaceutical sciences

authors： Lee FH,Scrime M,Edelson J

更新日期：1978-07-01 00:00:00

abstract：:The affinity chromatographic technique was used to study the interaction of bovine serum albumin and salicylic acid at 3.3 +/- 1.1 degrees. Beaded agarose gel, on which the albumin was immobilized by covalent linkage, was packed in a column as an affinity adsorbent. Frontal analysis was performed on this column to eva...

journal_title：Journal of pharmaceutical sciences

authors： Nakano NI,Oshio T,Fujimoto Y,Amiya T

更新日期：1978-07-01 00:00:00

abstract：:A single method for the quantitative determinations of three active ingredients, phenylephrine hydrochloride, phenylpropanolamine hydrochloride, and brompheniramine maleate, and one inactive ingredient (sodium benzoate) in a commercial product for colds is reported. The method is based on paired ion high-pressure liqu...

journal_title：Journal of pharmaceutical sciences

authors： Ghanekar AG,Das Gupta V

更新日期：1978-06-01 00:00:00

abstract：:The area under the plasma concentration-time curve (AUC) was measured after an intravenous injection of sodium salicylate and after intragastric administration of aspirin, using either an intermittent sampling and the trapezoid rule (AUC-trapezoid) or the recently introduced constant blood withdrawal method (AUC-integ...

journal_title：Journal of pharmaceutical sciences

authors： Kowarski CR,Kowarski AA

更新日期：1978-06-01 00:00:00

abstract：:A difference spectrophotometric analytical method was developed for the selective determination of p-hydroxybenzoic acid in the presence of its alkyl esters without prior separation. Based on the spectral shift to a shorter wavelength accompanyint carboxyl dissociation, the procedure measures as little as 2% of this a...

journal_title：Journal of pharmaceutical sciences

authors： Fink DW,Fink HC,Tolan JW,Blodinger J

更新日期：1978-06-01 00:00:00

abstract：:The hypothermic response following intraperitoneal doses (6.25, 12.5, and 25 mg/kg) of cobaltous chloride was investigated in Swiss albino mice. The magnitude and duration of rectal temperature depression were dose related. In each case, maximal hypothermia was evident within 30 min after injection. Body temperature d...

journal_title：Journal of pharmaceutical sciences

authors： Burke DH

更新日期：1978-06-01 00:00:00

abstract：:The influence of various test meals and coadministered water volumes on erythromycin stearate bioavailability from orally dosed film-coated tablets was studied in healthy human subjects. Serum erythromycin levels were uniformly reduced by all test meals, with the reduction in mean peak serum levels varying from 47 to ...

journal_title：Journal of pharmaceutical sciences

authors： Welling PG,Huang H,Hewitt PF,Lyons LL

更新日期：1978-06-01 00:00:00

abstract：:A modified NF method for the quantitative determination of pentaerythritol tetranitrate is reported. A solution of powder is made directly from the dosage form in glacial acetic acid and is then reacted with phenoldisulfonic acid TS. The proposed method saves approximately 75% of the time required with the NF method. ...

journal_title：Journal of pharmaceutical sciences

authors： Gupta VD

更新日期：1978-05-01 00:00:00

abstract：:Melphalan (30 microgram/ml) is completely hydrolyzed in water at 37 degrees after 8 hr. At lower temperatures, hydrolysis proceeds at slower rates. The presence of bovine serum albumin retards hydrolysis of melphalan (30 microgram/ml) in water. The melphalan hydrolysis rate is directely releated to the bovine serum al...

journal_title：Journal of pharmaceutical sciences

authors： Chang SY,Alberts DS,Farquhar D,Melnick LR,Walson PD,Salmon SE

更新日期：1978-05-01 00:00:00

abstract：:The synthesis of diazoketone analogs of amino acids and associated problems were investigated with N-phthaloyl-DL-alanine serving as a model. The carboxyl was activated by conversion to the acid chloride or, under mild conditions, to the mixed anhydride obtained with ethyl chloroformate or dicyclohexylcarbodiimide; th...

journal_title：Journal of pharmaceutical sciences

authors： Paul B,Korytnyk W

更新日期：1978-05-01 00:00:00

abstract：:A pharmacokinetic model that permits prediction of aqueous humor pilocarpine levels following topical application to rabbit eyes was developed. The model is able to account for changes in both instilled solution volume and drug concentration. The model, although simplified, relies mainly on experimentally verifiable a...

journal_title：Journal of pharmaceutical sciences

authors： Himmelstein KJ,Guvenir I,Patton TF

更新日期：1978-05-01 00:00:00

abstract：:4-Fluoroisoleucine was produced by ammonolysis of 2-bromo-4-fluoro-3-methylpentanoic acid, which resulted from the bromofluorination of 4-methyl-2-pentenoic acid. It did not inhibit Plasmodium berghei in mice at 640 mg/kg and was not toxic to the animals. The fluoroamino acid inhibited Aspergillus niger, Trichoderma v...

journal_title：Journal of pharmaceutical sciences

authors： Gershon H,Shanks L,Clarke DD

更新日期：1978-05-01 00:00:00

abstract：:The synthesis, hydrolysis rate, and bioavailability of 1-(p-acetaminophenoxy)-1-ethoxyethane, an acetaminophen prodrug, are described. The prodrug is less soluble than acetaminophen and stable at neutral pH. However, in an acidic environment, the compound cleaves rapidly, generating acetaminophen. When both the prodru...

journal_title：Journal of pharmaceutical sciences

authors： Hussain A,Kulkarni P,Perrier D

更新日期：1978-04-01 00:00:00

abstract：:Alkyl esters (C1--C4) of the four halofumaric acids were tested for antifungal activity against Candida albicans, Aspergillus niger, Mucor mucedo, and Trichophyton mentagrophytes at pH 5.6 and 7.0 in the absence and presence of 10% beef serum in Sabouraud dextrose agar. The most toxic compound to each organism was: C....

journal_title：Journal of pharmaceutical sciences

authors： Gershon H,Shanks L

更新日期：1978-04-01 00:00:00

abstract：:Chlortetracycline was successfully separated from its degradation products and from other tetracyclines on a paper chromatogram previously impregnated with a mixture of edetate disodium and urea solution in pH 5.0 McIlvaine buffer. Chlortetracycline separation from its degradation products and from both tetracycline a...

journal_title：Journal of pharmaceutical sciences

authors： Youssef MK,Attia IA,Safwat S

更新日期：1978-04-01 00:00:00

abstract：:The correlation of log P (in octanol--water) with the nonempirical, topologically dependent, calculated molecular connectivity index (1chiv) delineates substituted hydroxyureas into two families of linearly related groups of compounds. The first group, composed of the 3-substituted ethyl, n-propyl, and n-butyl analogs...

journal_title：Journal of pharmaceutical sciences

authors： Parker GR

更新日期：1978-04-01 00:00:00

abstract：:Previously available GLC methods for ethambutol may only be used to measure quantities of drugs much greater than those found in biological fluids such as plasma and dialysate. A previously published GLC method for plasma samples is extended to measure ethambutol in dialysate. A second GLC method, involving derivatiza...

journal_title：Journal of pharmaceutical sciences

authors： Lee CS,Benet LZ

更新日期：1978-04-01 00:00:00

abstract：:The plasma nitroglycerin levels obtained after intracardial (0.7 mg/kg), oral (7 mg/kg), and topical (7--14 mg/kg) doses of nitroglycerin in rats are reported. Nitroglycerin followed essentially one-compartment kinetics after intracardial administration, showing a mean half-life of about 4 min and a mean apparent volu...

journal_title：Journal of pharmaceutical sciences

authors： Yap PS,Fung HL

更新日期：1978-04-01 00:00:00

abstract：:4,5-Dimethoxykynuramine was synthesized in a three-step sequence originating with veratrole. Indirect evidence indicates that the drug was converted in vivo to the hypotensive agent 6,7-dimethoxy-4-quinolinol by the action of monoamine oxidase. ...

journal_title：Journal of pharmaceutical sciences

authors： Schwan TJ,Honkomp LJ,Snyder HR Jr,Watson EJ

更新日期：1978-03-01 00:00:00

abstract：:The dissolution rates of a number of drug-urethan solid-state dispersion systems were studied. A marked enhancement of the initial dissolution rates of several poorly water-soluble drugs was found when they were incorporated into a urethan matrix by heat fusion. These differences were considerable when pure substances...

journal_title：Journal of pharmaceutical sciences

authors： Maulding HV

更新日期：1978-03-01 00:00:00

abstract：:The germacranolide sesquiterpene lactones costunolide, parthenolide, and costunolide diepoxide were isolated from the leaves of Magnolia grandiflora L. Costunolide diepoxide might be, at least in part, an artifact derived from air oxidation of parthenolide. The root bark yielded only costunolide together with the two ...

journal_title：Journal of pharmaceutical sciences

authors： el-Feraly FS,Chan YM

更新日期：1978-03-01 00:00:00

abstract：:The synthesis and antibacterial evaluation of a number of 2-(substituted phenylureido)-4-thiocyanatobenzothiazoles are described. The more active compounds against the test organisms in vitro generally were those substituted with halogens on the phenyl and benzothiazole rings. ...

journal_title：Journal of pharmaceutical sciences

authors： Alaimo RJ,Pelosi SS,Freedman R

更新日期：1978-02-01 00:00:00

abstract：:The intense blue color formed in the official assay of menadione injection by treatment of the sample with 2,4-dinitrophenylhydrazine and ammonia is shown by data from visible light spectra and mass spectra and by comparison of the pKa value with that of the corresponding reaction product of acetone to be due to proto...

journal_title：Journal of pharmaceutical sciences

authors： Burns LB,Stedman RJ,Tuckerman MM

更新日期：1978-02-01 00:00:00

abstract：:Electron donor-acceptor complexes for a group of quinolines and naphthalenes with 9-(dicyanomethylene)-2,4,7-trinitrofluorene in 1,2-dichloroethane were studied by optical absorption methods. Association constants, molar absorptivities, and charge-transfer transition energies were evaluated for each system, together w...

journal_title：Journal of pharmaceutical sciences

authors： Webb NE,Thompson CC

更新日期：1978-02-01 00:00:00

abstract：:The equilibrium constants, kinetics, and mechanism of promazine and promethazine oxidation by ferric perchlorate were investigated at different temperatures and acidities using a stopped-flow spectrophotometric technique. The overall reaction can be represented as follows: (formula: see text) where P+ represents the r...

journal_title：Journal of pharmaceutical sciences

authors： Gasco MR,Carlotti ME

更新日期：1978-02-01 00:00:00

abstract：:An analysis of the disintegration-dissolution sequence of drug release from a tablet leads to a mathematical expression relating disintegration to the dissolution profile of the tablet and the dissolution rate of the primary drug particles in the tablet. The equation describing the disintegration of an acetaminophen t...

journal_title：Journal of pharmaceutical sciences

authors： Nelson KG,Wang LY

更新日期：1978-01-01 00:00:00

abstract：:A method is described for the analysis of amitriptyline, doxepin, imipramine, nortriptyline, desmethyldoxepin, desipramine, and protriptyline in human plasma utlizing GLC-chemical-ionization mass spectrometry with selected ion monitoring. The assay is highly specific and is quantitative to at least 1 ng/ml with a stan...

journal_title：Journal of pharmaceutical sciences

authors： Jenkins RG,Friedel RO

更新日期：1978-01-01 00:00:00

abstract：:A new three-step synthesis of 4-amino-3-hydroxybutyric acid from an inexpensive starting material and under mild reaction conditions is described. Crotonic acid was brominated by the Wohl-Ziegler reaction to 4-bromocrotonic acid, which, in turn, was converted with ammonium hydroxide into 4-aminocrotonic acid. This com...

journal_title：Journal of pharmaceutical sciences

authors： Pinza M,Pifferi G

更新日期：1978-01-01 00:00:00

abstract：:The biphasic degradation of delta9-tetrahydrocannabinol (I), as monitored by flame-ionization GLC, produced delta8-tetrahydrocannabinol (II), cannabidiol (X), 9-hydroxyhexahydrocannabinol (VI), 9,10-dihydro-9-hydroxyisocannabidiol (VI), and and 6,12-dihydro-6-hydroxycannabidiol (VIII) in acidic solutions. Further iden...

journal_title：Journal of pharmaceutical sciences

authors： Garrett ER,Gouyette AJ,Roseboom H

更新日期：1978-01-01 00:00:00

abstract：:A method of depicting dimensional illustrations of molecules in vacuo that are sensitive to small electronic perturbations was attempted. This method would be useful in determining the effects of either perturbing groups from other molecules or changes produced by the addition or modification of an existing atom or ch...

journal_title：Journal of pharmaceutical sciences

authors： Breon TL,Petersen H Jr,Paruta AN

更新日期：1978-01-01 00:00:00