Abstract：
:A set of nonionic cellulose ethers with varying hydrophobicity and molecular weight has been investigated by principal component analysis (PCA). Several experimental variables such as dynamic surface tension, diffusion coefficient, microviscosity as monitored by a fluorescence probe technique, and intrinsic viscosity are included in the analysis. The experimental variables and observations (polymer fractions) are analyzed in models with good predictive capacities. The apparent equilibrium surface tension correlates to the cloud point and to the critical aggregation concentration in the presence of surfactant. The microviscosity is shown to be a predictive parameter for the degree of hydrophobic substitution. The irreversible process of dynamic surface tension is dependent on the diffusion coefficient but to an even larger degree on the polymer concentration, which is well illustrated by the PCA models.
journal_name
J Pharm Scijournal_title
Journal of pharmaceutical sciencesauthors
Persson B,Evertsson H,Bergman R,Sundelöf LOdoi
10.1021/js9804922subject
Has Abstractpub_date
1999-08-01 00:00:00pages
767-74issue
8eissn
0022-3549issn
1520-6017pii
S0022-3549(15)50841-1journal_volume
88pub_type
杂志文章abstract：:We report a programed drug delivery system that can tailor the release of anesthetic bupivacaine in a spatiotemporally controlled manner. The drug delivery system was developed through the combination of a collagen-based injectable hydrogel and 2 types of poly(lactic-co-glycolic acid) (PLGA) particles. As a rapid-rele...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2016.09.020
更新日期：2016-12-01 00:00:00
abstract：:A kinetic dialysis technique together with a radiolabeled chenodeoxycholate (CDC) was used to determine the existence of a relationship between the monomer concentration of CDC and the total CDC concentration in different CDC solutions containing 1 or 5 mM sulfobutylether (SBE)-β-cyclodextrin. On the basis of the natu...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.23231
更新日期：2012-08-01 00:00:00
abstract：:The major route of degradation of tetrazepam (1) is oxidation to 7-chloro-5-(3-keto-cyclohexen-1-yl)-1,3-dihydro-1-methyl-2H-1, 4-benzodiazepin-2-one (3) via the stable 7-chloro-5-(3-hydroperoxy-cyclohexen-1-yl)-1,3-dihydro-1-methyl-2H -1, 4 benzodiazepin-2-one (2). Minor degradation products are 7-chloro-5-(1,2-epoxy...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600810216
更新日期：1992-02-01 00:00:00
abstract：:The metabolic disposition of 14C-labeled carprofen [(+/-)-6-chloro-alpha-methylcarbazole-2-acetic acid] was investigated in rats, dogs, and humans. Carprofen is eliminated predominantly by biotransformation in these three species. In dogs and rats, the direct conjugation of carprofen to form an ester glucuronide and o...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600691104
更新日期：1980-11-01 00:00:00
abstract：:A new method for determining a quaternary mixture of vitamins B6, B1, and B12 and uridine 5'-triphosphate (UPT) using second-derivative spectrophotometry is described. Calibration graphs were linear up to 30 micrograms/mL of vitamin B6 at 307 nm (r = 0.9999) and vitamin B1 at 282.7 nm (r = 0.9997) and up to 35 microgr...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600840109
更新日期：1995-01-01 00:00:00
abstract：:Anionic surfactants compromise skin's barrier function by damaging stratum corneum lipids and proteins. The objective of this study was to examine anionic surfactant-induced changes in the skin's polar and transcellular pathways and the resulting impact on surfactant penetration into the skin. Three anionic surfactant...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2019.06.030
更新日期：2019-11-01 00:00:00
abstract：:The dielectric constant of a solid substance in the dissolved state may be found by using a solvent with a dielectric constant that remains invariable when the solid substance is dissolved. The slope values obtained from dielectric constant versus concentration plots of the solid substance in two solvents with differe...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600680408
更新日期：1979-04-01 00:00:00
abstract：:Mixture response-surface methodology can be used as a technique to predict solubility in mixed solvent systems. The present report shows that if the intent is to predict solubility in nonideal solutions, mixture response-surface methodology is a better technique than one which assumes a particular mechanism to hold tr...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600740206
更新日期：1985-02-01 00:00:00
abstract：:The bioavailability of single lots of 250-mg ampicillin capsules, available from 17 distributors and/or manufactures, was determined. Each product was evaluated in terms of the serum ampicillin levels achieved at 1, 2, 3, 4, 6, and 8 hr postadministration, the peak serum levels, the time of peak serum level, and the a...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600650505
更新日期：1976-05-01 00:00:00
abstract：:The results of this study show that pentamidine isethionate (PI) can exist in at least four crystalline forms-three anhydrates designated as forms A, B, and C, and a trihydrate. Form C is the high-temperature modification, produced by heating forms A, B, and the trihydrate above 130 degrees C and cannot be produced un...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1021/js970342b
更新日期：1998-09-01 00:00:00
abstract：:Recent studies have clearly demonstrated that Fourier transform IR spectroscopy can be a powerful tool for the study of protein stabilization during freeze-drying and for optimizing approaches to prevent lyophilization-induced protein aggregation. The purpose of the current review is to provide an overview of these to...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600840407
更新日期：1995-04-01 00:00:00
abstract：:A novel drug-deliver device based on a self-setting bioactive cement formed from tetracalcium phosphate and dicalcium phosphate has been developed and tested in vitro using bovine insulin and bovine albumin as model polypeptide drugs. Equimolar mixtures of the calcium phosphate powders containing bovine insulin and bo...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600830229
更新日期：1994-02-01 00:00:00
abstract：:The development of order during the aging of aluminum hydroxide gel prepared by the reaction of aluminum chloride and ammonium hydroxide to a final pH of 7.0 can be monitored by differential thermal analysis. The loss fo acid reactivity upon aging is accompanied by an increase in the temperature and intensity of the d...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600650931
更新日期：1976-09-01 00:00:00
abstract：:A number of biopharmaceuticals are available as lyophilized formulations along with a prefilled syringe (PFS) containing water for injection (WFI). Submicron- and micron-size droplets of lubricating silicone oil (SO) applied to the inner surface of the PFS barrel might migrate into the WFI, to which protein pharmaceut...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2019.02.002
更新日期：2019-07-01 00:00:00
abstract：:Blends of polymers with complementary properties hold promise for addressing the diverse, demanding polymer performance requirements in amorphous solid dispersions (ASDs), but we lack comprehensive property understanding for blends of important ASD polymers. Herein, we prepare pairwise blends of commercially available...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.23991
更新日期：2014-09-01 00:00:00
abstract：:The standard free energy change (delta G0) for equilibrium dissolution in binary solvent mixtures is written as a sum of effects arising from solvent-solvent interactions (the general medium effect), solvent-solute interactions (the solvation effect), and solute-solute interactions (the intersolute effect). The genera...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600810418
更新日期：1992-04-01 00:00:00
abstract：:The purpose of this study was to develop quantitative structure-activity/pharmacokinetic relationships (QSAR/QSPKR) for 11 selected corticosteroids in man. Multiple linear regression analysis with an automatic forward step-wise inclusion algorithm was used to construct QSAR/QSPKR models from molecular and submolecular...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.10231
更新日期：2002-11-01 00:00:00
abstract：:Colonic drug delivery is intended for local or systemic therapies. The lack of predictive in vitro or animal model leads to considerable time delays in colonic product development. The objective of this scintigraphic study was to provide "proof of concept" for a novel capsule-type colonic delivery system (Colon-Target...
journal_title：Journal of pharmaceutical sciences
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1021/js9704588
更新日期：1998-05-01 00:00:00
abstract：:The stereochemistries of geometric isomers of 4-(2-bromo-1,2-diphenylvinyl)phenol, 4-(2-bromo-1,2-diphenylvinyl)anisole, and 2-[p-(2-bromo-1,2-diphenylvinyl)phenoxy]triethylamine were determined by conversion of the phenolic analog to the ethers and subsequent comparison of physical properties with those of 2-[p-(2-ch...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600651036
更新日期：1976-10-01 00:00:00
abstract：:The α-keto carboxylic acid, pyruvic acid (1) was found to be a very effective peroxide scavenger but is subject to an aldol-like self-condensation/polymerization reaction. The purpose of this study was to evaluate the hydrogen peroxide, H2O2, scavenging ability of 3-methyl-2-oxobutanoic acid (2), 4-methyl-2-oxopentano...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2016.03.041
更新日期：2016-09-01 00:00:00
abstract：:Heckel analysis, tablet tensile strength, and indentation hardness were determined for a series of sieved and roller compacted microcrystalline cellulose mixtures under both unlubricated and lubricated conditions with magnesium stearate. These results have been used to evaluate the loss of reworkability following roll...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.20938
更新日期：2007-05-01 00:00:00
abstract：:A mathematical model based on convective diffusion was developed to describe the rate of dissolution form the surface of a compressed compact. Experimental studies were carried out to test the model. The basic experimental apparatus consisted of a modified rotating-filter-stationary basket dissolution test apparatus. ...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600640407
更新日期：1975-04-01 00:00:00
abstract：:The recently developed hydrogen-bonding propensity tool in the Cambridge Structural Database software package (Mercury) was tested to predict polymorphs. The compounds for the study were chosen from a list of approximately 300 pharmaceutically important compounds, for which multiple crystal forms had not been previous...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.24449
更新日期：2015-06-01 00:00:00
abstract：:Magnetic resonance imaging (MRI) with chemical shift resolution is a recent extension of MRI and it provides information about species resolved molecular transport on the macroscopic scale in complex systems. In this contribution, we show that by using this novel method, one can predict the behavior of drug and food m...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.20749
更新日期：2007-02-01 00:00:00
abstract：:An automated two-phase method for the simultaneous fluorometric determination of the spironolactone metabolites canrenone (II) and canrenoic acid (III) in serum is described. The determination is performed by two dichloroethane extractions of the same serum sample at different pH values. The fluorescence developed in ...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600660820
更新日期：1977-08-01 00:00:00
abstract：:The present study describes the development of an orally disintegrating tablet containing a non-water-soluble drug delivery system. A model system was applied to evaluate the effect of different-sized particles on tablet characteristics. Cellets were incorporated into tablets prepared by freeze-drying from a 100 mg/mL...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.23517
更新日期：2013-06-01 00:00:00
abstract：:Unlike most organic compounds, both digoxin and digitoxin melted over a wide temperature range, with the widest range being 88 and 33 degrees for both compounds, respectively. Furthermore, the melting ranges varied markedly among several untriturated powders obtained from commercial sources and after recrystallization...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600681008
更新日期：1979-10-01 00:00:00
abstract：:A sensitive, simple, and rapid method for the quantitation of ibuprofen in plasma, using 1-(p-fluorobenzoyl)-5-methoxy-2-methylindole acetic acid as the internal standard, was developed. The method is based on reversed-phase high-pressure liquid chromatography with a mobile phase containing acetonitrile--0.1 M acetic ...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600700829
更新日期：1981-08-01 00:00:00
abstract：:Crystallization of polymorphs still has a touch of art, as even prior observations of polymorphs do not guarantee their crystallization. However, once crystals of various polymorphs have been obtained, their relative stabilities can be established with a straightforward thermodynamic approach even if the conclusion wi...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.24626
更新日期：2015-12-01 00:00:00
abstract：:SPRYCEL® (Dasatinib) is a Biopharmaceutical Classification System II weakly basic drug that exhibits strong pH-dependent solubility. Dasatinib is currently presented in 2 drug product formulations as an adult immediate release tablet and a pediatric powder for oral suspension. A bioequivalence study comparing the form...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2018.11.005
更新日期：2019-01-01 00:00:00
