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Showing 1-30 of 37 results for "57939" within Papers
M P Purdon et al.
Journal of pharmacological and toxicological methods, 37(2), 67-73 (1997-03-01)
A reproducible, sensitive high-performance liquid chromatography (HPLC) method has been developed to quantify hydroxytestosterone metabolites. The method features a simple one-step linear gradient of methanol in water (10%-60% methanol) for separation of the testosterone metabolites on a Supelcosil LC-18 column;
Catrina L Dupard-Julien et al.
Analytical and bioanalytical chemistry, 387(3), 1027-1032 (2007-01-06)
A reversed-phase, high-performance liquid chromatography (RP-HPLC) method that allows quantitation of low levels of epoxides has been described. The method involved derivatization of epoxides using 100- to 1,000-fold excess N,N-diethyldithiocarbamate (DTC) at 60 degrees C for 20 min at neutral
V Stocchi et al.
Amino acids, 3(3), 303-309 (1992-10-01)
In this paper we report the complete separation of amino acids as DABS-derivatives using a 3µm Supelcosil LC-18 (25 cm × 2.1 mm I.D.) narrowbore column. The system described makes it possible to perform the analysis of DABS-amino acids with
Mert Ilhan et al.
Evidence-based complementary and alternative medicine : eCAM, 2014, 578103-578103 (2014-08-29)
The aim of the present research is to evaluate the antiurolithiatic effect of the various extracts prepared from the fruits of Viburnum opulus L., in regard to its ethnobotanical record. To induce urolithiasis, 70 mg/kg sodium oxalate was injected to the
L Marai et al.
Canadian journal of biochemistry and cell biology = Revue canadienne de biochimie et biologie cellulaire, 61(8), 840-849 (1983-08-01)
Natural triacylglycerols were resolved by high pressure liquid chromatography on Supelcosil LC-18 columns using a gradient of 30-90% propionitrile in acetonitrile as eluting solvent. The effluent was admitted to a quadrupole mass spectrometer via a direct liquid inlet interface. The
E Terjéki et al.
Journal of pharmaceutical and biomedical analysis, 24(5-6), 913-920 (2001-03-15)
RGH-1756 (1-(2-methoxy-phenyl)-4-(4-[4-(6-imidazo[2,1-b]-thiazolyl)-phenoxy]-butyl)-piperazine dimethansulphonate) is a novel atypical antipsychotic candidate of Gedeon Richter Ltd. A new HPLC method has been developed and validated for the quantitative determination of RGH-1756 in dog and rat plasma. The compound and the internal standard are
V Stocchi et al.
Analytical biochemistry, 146(1), 118-124 (1985-04-01)
A simple and rapid method for the determination of ATP, ADP, AMP, NADP+, NAD+, NADPH, and NADH in human erythrocytes is described. A single-step extraction procedure employing alkaline medium and CF 50A Amicon ultrafiltration membranes allows a simultaneous and total
J S Patrick et al.
Analytical biochemistry, 199(1), 125-131 (1991-11-15)
A rapid, isocratic method for the determination of tryptophan in Escherichia coli fermentation broths by reversed-phase HPLC is described. Tryptophan can be measured in fermentations containing either chemically defined media or media with hydrolyzed protein supplements. The procedure was rugged
Abad Khan et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 878(25), 2339-2347 (2010-08-11)
A novel, simple and fast reversed-phase HPLC/UV method was developed, optimized for various chromatographic conditions, and validated according to international guidelines for simultaneous determination of all-trans-retinol and alpha-tocopherol in human serum using retinyl acetate as internal standard in the concentration
K D Dotson et al.
Lipids, 27(11), 933-939 (1992-11-01)
Human milk triacylglycerols were separated by high-performance liquid chromatography. A 5-mu Supelcosil LC-18 column (Supelco, Inc., Bellefonte, PA) was used with acetone/acetonitrile (64:36, vol/vol) as mobile phase. Triacylglycerols were tentatively identified based on theoretical carbon number and relative retention time.
M J Magera et al.
Clinical chemistry, 46(11), 1804-1810 (2000-11-09)
Liquid chromatography-tandem mass spectrometry (LC-MS/MS) with electrospray ionization is robust and allows accurate measurement of both low- and high-molecular weight components of complex mixtures. We developed a LC-MS/MS method for the analysis of methylmalonic acid (MMA), a biochemical marker for
Thadikamala Sathish et al.
Pakistan journal of pharmaceutical sciences, 22(1), 68-73 (2009-01-27)
An accurate, simple, reproducible and sensitive RP-HPLC method for the determination of bharangin has been developed and validated. The separation of bharangin and 2-nitroaniline (internal standard) was achieved on Supelcosil LC-18 (3micro, 150 x 4.6 mm i.d.) column using UV
P K Kunicki
Journal of chromatography. B, Biomedical sciences and applications, 755(1-2), 331-335 (2001-06-08)
A HPLC-UV determination of loratadine in human plasma is presented. After simple liquid-liquid extraction with 2-methylbutane-hexane (2:1) and evaporation of organic phase the compounds were re-dissolved in 0.01 M HCl, evaporated again and finally separated on a Supelcosil LC-18-DB column.
O C Ingebretsen et al.
Clinica chimica acta; international journal of clinical chemistry, 126(3), 307-313 (1982-12-23)
The amounts of coenzyme A (CoASH) and acetyl-CoA in the acid-soluble extract of human blood platelets were quantitated by an isocratic reversed-phase liquid-chromatographic system. The analytical column was Supelcosil LC-18, and the solvent was 220 mmol/l potassium phosphate, pH 4.0
O Majid et al.
Therapeutic drug monitoring, 23(2), 163-168 (2001-04-11)
Recipients of organ transplants remain particularly dependent on prednisolone as part of their maintenance immunosuppression. Despite this, the pharmacokinetics of prednisolone have never been fully characterized in these patients, and consequently dosing remains empirical. Accurate monitoring of prednisolone, its primary
S L Bramer et al.
Journal of pharmaceutical and biomedical analysis, 26(4), 637-650 (2001-08-23)
An LC/MS/MS method for the simultaneous determination of cilostazol, a quinolinone derivative, and three active metabolites, OPC-13015, OPC-13213, and OPC-13217, in human plasma was developed and validated. Cilostazol, its metabolites, and the internal standard, OPC-3930 were extracted from human plasma
K M Matar et al.
Therapeutic drug monitoring, 21(5), 559-566 (1999-10-16)
A simple, rapid, sensitive, and reproducible high-performance liquid chromatographic (HPLC) method for simultaneous determination of the antiepileptic drugs (ethosuximide, primidone, lamotrigine, phenobarbital, phenytoin, and carbamazepine) and two metabolites (carbamazepine-diol and carbamazepine-epoxide) in human plasma is described. The procedure involves extraction
Khaled S Abdelkawy et al.
Biomedical chromatography : BMC, 31(3) (2016-08-25)
A simple, accurate, and reproducible high-performance liquid chromatography (HPLC) method has been developed and validated for the quantification of quercetin (QR) in rat plasma. The method involves a simple protein precipitation procedure to extract both QR and thymoquinone (TQ), the
Chao-yun Wang et al.
Se pu = Chinese journal of chromatography, 20(4), 348-349 (2003-01-25)
The base contents of liver deoxyribonucleic acid (DNA) of rats living at an altitude of 2.3 km were determined by reversed-phase high performance liquid chromatography. At first, 0.05 mol/L KH2PO4(pH 4.0) was used to dissolve the DNA acid hydrolysis products
Michael Koll et al.
Biomedical chromatography : BMC, 19(2), 119-122 (2004-09-17)
A validated high performance liquid chromatographic method was developed for the determination of chromium picolinate in pharmaceutical dosage forms. The analysis was performed at room temperature using a reversed-phase Supelcosil LC-18 (250 x 4.6 mm, 5 microm) column. The mobile
N K Karamanos et al.
Journal of chromatography. A, 765(2), 169-179 (1997-03-28)
In this report we describe a convenient and sensitive HPLC method for separating and determining the non- and variously sulphated delta-disaccharides derived from heparan sulphate, heparin and Fragmin, using heparin- and heparan sulphate lyases. This method is superior to others
G R Granneman et al.
Clinical pharmacokinetics, 29 Suppl 2, 1-8 (1995-01-01)
A rapid and sensitive assay was developed for the measurement of plasma concentrations of zileuton racemate, a potent inhibitor of 5-lipoxygenase. Zileuton and its inactive N-dehydroxylated metabolite were extracted from human, monkey, and rat plasma by use of a solid-phase
V Stocchi et al.
Analytical biochemistry, 167(1), 181-190 (1987-11-15)
A simple and fast ion pair reversed-phase high-performance liquid chromatographic method has been developed for the simultaneous determination of ATP, ADP, AMP, GTP, GDP, IMP, NADP+, NADPH+, NAD+, NADH, ADP-ribose, inosine, adenosine, hypoxanthine, and xanthine. This method allows us to
Carola F Ferreyra et al.
Journal of AOAC International, 88(6), 1649-1654 (2006-03-11)
The aim of this research was to develop and validate a sensitive, rapid, easy, and precise reversed-phase liquid chromatography (LC) method for stability studies of bifonazole (I) formulated with tinctures of calendula flower (II). The method was especially developed for
D C Holland et al.
Journal of AOAC International, 78(4), 1067-1071 (1995-07-01)
A liquid chromatographic (LC) method is described for the simultaneous determination of the triazine herbicides, simazine (SIM), atrazine (ATZ), and propazine (PRO) in the 12.5-100 ppb range in catfish. The herbicides are extracted from catfish homogenates with ethyl acetate, followed
C Ferreyra et al.
Journal of pharmaceutical and biomedical analysis, 25(3-4), 493-499 (2001-05-30)
A reverse phase high performance liquid chromatography assay was carried out for the simultaneous determination of three active principles present in tablets of different origin and wide commercial use in the Province of Córdoba (Argentina). Prescriptions, commercially available as appetite
W A Moats
Journal of AOAC International, 76(3), 535-540 (1993-05-01)
A simple and sensitive method was developed for determination of cephapirin and its metabolite, desacetylcephapirin, in milk. For extraction/deproteinization, 2 mL 0.2M tetraethylammonium chloride and 28 mL acetonitrile are added to 10 mL milk, and 20 mL clear filtrate (=
Andréa Granada et al.
Journal of AOAC International, 91(3), 551-556 (2008-06-24)
A simple, rapid, and sensitive reversed-phase column high-performance liquid chromatographic method was developed and validated to quantify camptothecin (CPT) in polymeric nanocapsule suspensions. The chromatographic separation was performed on a Supelcosil LC-18 column (15 cm x 4.6 mm id, 5
P A Hynning et al.
Clinical chemistry, 34(12), 2502-2503 (1988-12-01)
A high-performance liquid chromatographic (HPLC) method for determining verapamil and norverapamil in plasma is presented and compared with gas chromatography/mass spectrometry (GC-MS). The plasma samples were extracted at alkaline pH with hexane containing 2-butanol (20 mL/L) and then back-extracted into
N F Zelenkova et al.
Prikladnaia biokhimiia i mikrobiologiia, 39(1), 52-62 (2003-03-11)
Combinations of various regimens of thin-layer chromatography and high-performance liquid chromatography (HPLC) was efficient in analyzing 39 nitrogen-containing secondary metabolites (alkaloids) produced by 12 strains of microscopic fungi of the genus Penicillium. Chromatographic mobility of alkaloids on Silufol plates was
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