Abstract：
:DuP 747, a selective kappa agonist analgesic, was found to have at least two polymorphic forms, and this was confirmed by X-ray powder diffraction. DSC and thermomicroscopic studies indicated the polymorphic pair to be monotropic. Solubility studies suggested the relative stability of the two forms to be similar. The infrared (IR) and Raman spectra of the two crystal forms were significantly different, and their complementary nature was shown from the differences in peak intensities. Solid-state 13C-NMR data of the polymorphs showed only minor differences between the two forms. When viewed on the molecular level through the use of vibrational and NMR spectroscopies, the conformation of the molecule in the two polymorphs appears to be roughly equivalent. The magnitude of the spectral differences of the two polymorphs is, however, consistent with those that can be expected for two crystal forms that have resulted from different modes of packing, as caused by the solvent environment.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Raghavan K,Dwivedi A,Campbell GC Jr,Nemeth G,Hussain MAdoi
10.1016/0731-7085(94)e0002-isubject
Has Abstractpub_date
1994-06-01 00:00:00pages
777-85issue
6eissn
0731-7085issn
1873-264Xpii
0731-7085(94)E0002-Ijournal_volume
12pub_type
杂志文章abstract：:Omega-3 fatty acids are clinically useful and the two marine omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are prevalent in fish and fish oils. Omega-3 fatty acid formulations should undergo a rigorous regulatory step in order to obtain United States Food and Drug Administration (USFDA...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.04.002
更新日期：2017-07-15 00:00:00
abstract：:10 homeopathic remedies commercially available (each in 3 dilutions) as sugar granules, where half of them were of organic (and half inorganic) origin were subjected to solid-state infrared spectroscopy, both in middle infrared (ATR-FTIR) and near infrared (NIR) range. Measurements were repeated six times (six days, e...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2015.06.025
更新日期：2015-11-10 00:00:00
abstract：:A post-column LC detection system is described for the stereoselective detection of L- and D-amino acids. The effluent of the LC column passes an immobilized enzyme reactor (IMER) containing either L- or D-amino acid oxidase. The hydrogen peroxide formed in this reactor by the oxidation of the amino acids is then tran...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(90)80127-b
更新日期：1990-01-01 00:00:00
abstract：:A rapid, specific and very sensitive liquid chromatographic assay using standard ultraviolet detection has been developed to measure cefazolin (CFZ) or ceftriaxone (CFX) in small samples (200 microl) of plasma using either drug as the internal standard for measurement of the other. A rapid extraction was performed usi...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(99)00273-3
更新日期：2000-03-01 00:00:00
abstract：:The here described HPLC-method enables the determination of all major, currently known bioactive compounds in gentian roots. A separation of iridoids (loganic acid), secoiridoids (swertiamarin, gentiopicroside, amarogentin, sweroside), xanthones (gentisin, isogentisin) and two xanthone glycosides (gentiosides) was pos...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2007.07.001
更新日期：2007-11-05 00:00:00
abstract：:Management of the therapy of life-threatening bacterial infection is extremely based on an optimal antibiotic treatment. Achieving the correct vancomycin dosage in blood and target tissues can be complicated in special situations, e.g., where large fluid sequestration and/or acute renal failure occur. A UHPLC-MS/MS me...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.04.029
更新日期：2017-08-05 00:00:00
abstract：:Hydrates are of great pharmaceutical relevance and even though they have been characterized thoroughly by various analytical techniques, there is barely literature available on molecular mobility of the hydrate water studied by NMR relaxation in the time domain. The aim of this work was to examine the possibility of d...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.01.017
更新日期：2017-04-15 00:00:00
abstract：:A novel sensor based on a modification of glassy carbon electrode (GCE) with NH2-functionalized multi-walled carbon nano-tubes (NH2fMWCNTs) is reported and its applicability to the electrochemical sensing of Propafenone (PPF) demonstrated. The electrochemical catalytic activity was also utilized as a sensitive detecti...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2019.06.026
更新日期：2019-09-10 00:00:00
abstract：:Capillary electromigration techniques have become important tools for the analysis of pharmaceutical drugs. The present review updates on recent developments of the analysis of small molecule drugs, excipients and counter ions dating between January 2014 and May 2017. Capillary electrophoresis (CE) continues to be a v...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2017.06.063
更新日期：2018-01-05 00:00:00
abstract：:This research presents the results obtained from analysis by thin layer chromatography (TLC) of some free amino acids from sanguine plasma samples in the different degree progress in maladies: diabetes, renal syndrome and hepatic cirrhosis. The chromatograms were evaluated with a Shimadzu CS-9000 dual-wavelength flyin...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00479-4
更新日期：2001-11-01 00:00:00
abstract：:A simple, rapid and reproducible method for identification and quantification of iodopropynyl butylcarbamate (IPBC) in different cosmetic formulations is presented. The determination was carried out using a high-performance liquid chromatography (HPLC) procedure on a reversed phase column coupled to a single quadrupol...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00356-9
更新日期：2001-07-01 00:00:00
abstract：:A reversed-phase HPLC method is described for the simultaneous determination of nifedipine and its primary pyridine metabolite dehydronifedipine in blood and plasma, that involves UV detection and neutral (blood) or alkaline (plasma) extraction. The limit of reliable determination is found to be 3 ng ml-1 with an inte...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/0731-7085(91)80249-9
更新日期：1991-01-01 00:00:00
abstract：:We have developed an optical sensor for determining and quantifying naphazoline (NPZ) based on its inherent fluorescence property. We have placed a non-ionic-exchanger solid support (Amberlite XAD-7) in a flow cell in the light path of the excitation beam and the fluorescence signal for NPZ is continuously monitored a...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2005.02.018
更新日期：2005-07-15 00:00:00
abstract：:Sweat is a biofluid with present scant use as clinical sample. This review tries to demonstrate the advantages of sweat over other biofluids such as blood or urine for routine clinical analyses and the potential when related to metabolomics. With this aim, critical discussion of sweat samplers and equipment for analys...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2013.10.048
更新日期：2014-03-01 00:00:00
abstract：:Vaccines manufactured following "classical" methods contain inactivated or infectious but attenuated viruses or bacteria. In some instances, the inactivated agents are purified. In other cases, the vaccines contain protein subunits or practically pure polysaccharides. It is generally accepted that the final product ca...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/0731-7085(89)80087-1
更新日期：1989-01-01 00:00:00
abstract：:The pathophysiological mechanism of depression is complex and its etiology remains unclear. Metabolomics can be used to monitor multiple metabolic pathways simultaneously, thereby investigating the mechanisms of depression onset and its regulation. Therefore, we studied the metabolic profile of urine samples from a ra...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2018.11.058
更新日期：2019-02-20 00:00:00
abstract：:A bead injection spectroscopy-flow injection analysis (BIS-FIA) system for the spectrophotometric detection of promethazine and trifluoperazine is developed. The sensor is based in the oxidation of the phenothiazines by Fe(III) which is later determined by formation of the complex between Fe(II) and Ferrozine, [FeFz(3...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2004.03.010
更新日期：2004-09-03 00:00:00
abstract：:An LC procedure was developed to separate diatrizoate sodium from three known impurities. These impurities are 2,4- and 2,6-diiodo-3,5-diacetamidobenzoic acid (DDZA), and the free amine (5-acetamido-3-amino-2,4,6-triiodobenzoic acid). The separation was achieved using a Hamilton, PRP-X100, anion exchange column. The r...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(97)00007-1
更新日期：1997-09-01 00:00:00
abstract：:While capillary electrophoresis has been established as a major enantioseparation technique within the last decade, the potential of capillary electrochromatography is still studied extensively. This review summarizes recent applications of electromigration techniques with regard to the enantioseparation of chiral dru...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/s0731-7085(01)00653-7
更新日期：2002-01-15 00:00:00
abstract：:A simple, rapid and sensitive isocratic reversed phase HPLC method with UV detection using internal standard has been developed and validated for simultaneous determination of amoxicillin and clavulanic acid in human plasma. The assay enables the measurement of amoxicillin and clavulanic acid for therapeutic drug moni...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2007.06.019
更新日期：2007-11-05 00:00:00
abstract：:Topiroxostat is a recently identified safe and selective xanthine oxidoreductase inhibitor and has been used as a urate-lowing agent for the treatment of hyperuricemia and gout in Japan. In this study, we developed a sensitive, selective and high-throughput method that determines topiroxostat in human plasma using hig...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113470
更新日期：2020-09-10 00:00:00
abstract：:Capillary electrophoresis (CE) was applied to the study of several inhibitors of the angiotensin-converting enzyme. Separation of the compounds was performed by means of two phosphate buffers (each 100 mM) at pH 7.0 and 6.25, respectively [S. Hillaert, W. Van den Bossche, J. Chromatogr. A, 895 (2000) 33-42.]. Due to t...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00366-1
更新日期：2001-07-01 00:00:00
abstract：:Several methods are reported for the simultaneous determination of diazepam and pyridoxine: two graphical methods (zero-crossing and derivative quotient spectra); and two numerical methods (multiple linear regression and partial least-squares regression). The methods have been applied in the concentration ranges 1.4-4...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(96)01844-4
更新日期：1996-11-01 00:00:00
abstract：:In this article the merits of current liquid chromatography (LC) columns and techniques are reviewed, to include the following topics: (1) a brief introduction to rational therapeutic drug monitoring (TDM) to justify drug measurements; (2) selected recent survey results from the College of American Pathologists (CAP) ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/0731-7085(89)80041-x
更新日期：1989-01-01 00:00:00
abstract：:A new tadalafil analogue was detected and isolated from a dietary supplement, the structure was elucidated by means of nuclear magnetic resonance (NMR) and mass spectroscopy. The compound was determined to be diethylaminopretadalafil, which might be derived from a precursor in the synthesis of tadalafil. ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2014.01.043
更新日期：2014-06-01 00:00:00
abstract：:A rapid analytical procedure for routine identification and quantification of amoxicillin in premixes by high performance liquid chromatography was developed and tested. The ground premix samples were extracted for 10 min using 100ml extraction mixture water-methanol (800:200, v/v). The extract was analyzed by reverse...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2004.10.010
更新日期：2005-02-23 00:00:00
abstract：:Two HPLC-UV methods are described for the separate determination of artemether (AM) and the combined preservatives, methylparaben and propylparaben in a pharmaceutical dosage form. These analytes are contained in a dry suspension with a high amount of non-soluble excipients, some of which can interfere with the analys...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2006.07.053
更新日期：2007-01-17 00:00:00
abstract：:The objective of the present study was to develop a rapid and sensitive method for the determination of zabofloxacin, a novel, broad-spectrum fluoroquinolone antibiotic, in rat plasma. Rat plasma samples were deproteinized with methanol, and then were injected into an LC-MS system for quantification. Zabofloxacin and ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.11.001
更新日期：2011-03-25 00:00:00
abstract：:MB07133 is an intravenously administered cytarabine mononucleotide (araCMP) prodrug, for the treatment of hepatocellular carcinoma (HCC). A simple, selective and sensitive HPLC-MS/MS method using high pressure liquid chromatography (HPLC) coupled to triple-quadrupole mass spectrometer, was developed and validated for ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2015.12.049
更新日期：2016-02-20 00:00:00
abstract：:Two high performance chromatographic methods were developed and validated for the simultaneous determination of Ambroxol, Guaifenesin and Theophylline in pharmaceutical dosage forms and in the presence of Guaiacol and Caffeine as the officially stated impurities. These were a reversed phase liquid and a thin layer chr...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2019.112821
更新日期：2020-01-05 00:00:00
