Abstract:
:A method was developed for the assay of benzoic acid, 2-chloro-5-[[(1-methylethoxyl)thioxomethyl]amino]-,1-meth yle thyl ester (NSC 629243) in hamster, mouse, human and, to a limited extent, dog plasma. Protein in 0.5 ml of plasma was precipitated with four volumes of methanol and the supernatant was analysed for NSC 629243 by LC. Liquid chromatography was carried out on a reversed-phase Nova-Pak C18 column, with a mobile phase of 60% acetonitrile in water at 1 ml min-1, and the compound was quantified with a UV detector set at 283 nm. Two standard curves of NSC 629243 were needed to cover a concentration range of 0.05-100 micrograms ml-1. All standard curves had correlation coefficients > 0.999. In practice, the minimum quantifiable concentration was approximately 0.05 microgram ml-1 in 0.5 ml of plasma. NSC 629243 appeared to have good stability at 37 degrees C in hamster, human and dog plasma at concentrations of 1 and 50 micrograms ml-1 (at least 80% remained in plasma after a 4 h incubation). Breakdown occurred in mouse plasma after 1 h at 37 degrees C, with extensive breakdown occurring after 24 h. NSC 629243 was extensively bound to plasma proteins of Syrian hamsters and humans. The extent of binding ranged from a minimum of 88.6% to a maximum of 99.9% over a concentration range of ca 1-100 micrograms ml-1.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Nomeir AA,McComish MF,Mongan AL,Covey JM,Ferrala NFdoi
10.1016/0731-7085(94)80037-5subject
Has Abstractpub_date
1994-05-01 00:00:00pages
693-8issue
5eissn
0731-7085issn
1873-264Xpii
0731-7085(94)80037-5journal_volume
12pub_type
杂志文章abstract::As new metabolic pathways of cocaine were recently identified, a high performance liquid chromatography tandem mass spectrometry (LC-MS/MS) method was developed to simultaneously determine cocaine and nine cocaine-related metabolites in whole blood samples. One-step solid phase extraction was used to extract all of th...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2016.11.024
更新日期:2017-02-05 00:00:00
abstract::Ziv-aflibercept (ziv-AFL) is a complex fusion protein which is widely used in hospitals for the treatment of colorectal metastatic cancer. Charge variants are critical attributes for assessing post-transitional modifications (PMTs) that have to be controlled during the development and manufacture of these proteins and...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2020.113233
更新日期:2020-06-05 00:00:00
abstract::Type 1 diabetes mellitus is a major endocrine disorder, affecting approximately 5% of the world's population. It not only leads to hyperglycaemia but also causes many complications, and numerous studies have demonstrated that oxidative stress contributes to these complications. As a new strategy to improve the oxidati...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jpba.2010.07.034
更新日期:2010-12-15 00:00:00
abstract::Nitrofurnation is an antibacterial drug. It is used in the treatment of initial or recurrent urinary tract infections caused by susceptible organisms. The cyclic voltammogram of the drug in Britton-Robinson buffers (pH 2-11) exhibited a single well-defined cathodic peak at the hanging mercury drop electrode, that due ...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/s0731-7085(02)00344-8
更新日期:2002-10-15 00:00:00
abstract::One of the major reasons for age-related cataract formation is an accumulation of insoluble lens proteins. In particular, higher-order α-crystallin aggregates, comprising αA and αB subunits, are insolubilized by the build up of various post-translational modifications over time. Although we previously found an excepti...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2015.06.017
更新日期:2015-12-10 00:00:00
abstract::Nanoformulations are complex systems where physicochemical properties determine their therapeutic efficacy and safety. In the case of nanovaccines, particle size and shape play a crucial role on the immune response generated. Furthermore, the antigen's integrity is also a key aspect to control when producing a nanovac...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2019.113017
更新日期:2020-02-05 00:00:00
abstract::A simple, specific and reliable 1H-NMR spectroscopic method for the quantitative determination of the optical purity of indacrinone is described. After conversion of the S(+)- and R(-)-enantiomers to their methyl ester derivatives, they were coordinated with chiral europium(III) or praseodymium(III) shift reagents in ...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/0731-7085(89)80016-0
更新日期:1989-01-01 00:00:00
abstract::A simple and rapid method was developed for measuring 10 organophosphorus pesticides (acephate, methidathion, dichlorvos, fenthion, EPN, diazinon, phenthoate, malathion, fenitrothion, and cyanophos) in the serum of acute poisoning patients by LC/MS. Following deproteinization by acetonitrile, an aliquot of the biologi...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2007.01.036
更新日期:2007-05-09 00:00:00
abstract::Nuclear magnetic resonance (NMR) spectroscopy has a unique capability to probe the primary and higher order molecular structure and the structural dynamics of biomolecules at an atomic resolution, and this capability has been greatly fortified over the last five decades by an astonishing NMR instrumental and methodolo...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章,评审
doi:10.1016/j.jpba.2017.07.004
更新日期:2018-01-05 00:00:00
abstract::Procedures to assess tobacco smoke exposure are reviewed and biomarkers used for determining the smoking status of an individual are compared. Methods used to extract these biomarkers from saliva, urine, and blood and the advantages and disadvantages of the assays are discussed. Finally, the procedures used to measure...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2004.01.009
更新日期:2004-04-01 00:00:00
abstract::CPZEN-45 is a new drug candidate being considered for the treatment of tuberculosis (TB). The aim of this study was to develop and validate a reverse-phase high-performance liquid chromatographic (HPLC) method suitable to determine CPZEN-45 concentrations in biological samples. CPZEN-45 was extracted from biological f...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2013.09.014
更新日期:2014-01-01 00:00:00
abstract::Species-specific acid-base and partition equilibrium constants were experimentally determined for the therapeutically important semisynthetic opioid receptor agonist hydromorphone, dihydromorphine, and mixed agonist-antagonist nalorphine and nalbuphine. The acid-base microequilibria were characterized by combining pH-...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2016.12.014
更新日期:2017-02-20 00:00:00
abstract::Eprinomectin is a potent anthelmintic compound that kills certain parasitic nematodes and arthropods of cattle. A sensitive and automated bioanalytical assay was developed for quantitation of eprinomectin in bovine plasma in support of clinical development of eprinomectin for use in all classes of cattle. This assay d...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/s0731-7085(97)00183-0
更新日期:1998-04-01 00:00:00
abstract::Understanding the origin and fate of organic impurities within the manufacturing process along with a good control strategy is an integral part of the quality control of drug substance. Following the underlying principles of quality by design (QbD), a systematic approach to analytical control of process impurities by ...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2010.01.043
更新日期:2010-08-01 00:00:00
abstract::The antigenic P64k protein from the pathogenic bacterium Neisseria meningitidis has been used as an immunological carrier in several conjugated vaccines. The aim of this report was to develop and validate a sensitive sandwich enzyme-linked immunosorbent assay (ELISA) for the quantification of recombinant p64k protein,...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2011.01.041
更新日期:2011-06-01 00:00:00
abstract::Botulinum type A toxin (BoNT/A) is defined by its specific endopeptidase cleavage of SNAP25 between Gln(197) and Arg(198) under reducing conditions. The neurotoxin is widely used for therapeutic or cosmetic purposes, but should not contain other toxin serotypes or unwanted protease activities. Using a neoepitope endop...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2010.08.013
更新日期:2011-01-05 00:00:00
abstract::The objective of current study was to develop a validated specific stability indicating reversed-phase liquid chromatographic method for the quantitative determination of levofloxacin as well as its related substances determination in bulk samples, pharmaceutical dosage forms in the presence of degradation products an...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2009.05.038
更新日期:2009-12-05 00:00:00
abstract::A fast liquid chromatography-tandem mass spectrometry method using polarity switching and timed selected reaction monitoring has been developed and validated to quantify eight antiepileptic drugs and an active drug metabolite in human plasma within a single analytical assay. The antiepileptic drugs include levetiracet...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2019.112816
更新日期:2019-11-30 00:00:00
abstract::Direct current and differential pulse polarography DPP were used for the determination of three penicillins, namely, ampicillin, benzylpenicillin and carbenicillin, in pure form and in their dosage forms. The method is based upon treatment of penicillins with nitrous acid followed by polarographic measurement of the p...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/s0731-7085(97)00197-0
更新日期:1998-06-01 00:00:00
abstract::A reversed-phase high-performance liquid chromatography (RP-HPLC) method with UV-detection at room temperature has been developed for the analysis of insulin and its main degradation product, A21-desamido insulin. Octadecylsilica was used as stationary phase and a mixture of water and acetonitrile containing tetramety...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/s0731-7085(03)00336-4
更新日期:2003-09-15 00:00:00
abstract::Cyto-architectural diversity of brain structures emphasizes need for analytical tools for discriminative investigation of distinctive neural structures. Glycogen is the major energy reserve in the brain. There is speculation that brain utilization of this fuel source may affect detection of hypoglycemia. To evaluate s...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2019.112884
更新日期:2020-01-30 00:00:00
abstract::Besifloxacin is a fourth-generation broad-spectrum fluoroquinolone registered for the topical treatment of bacterial conjunctivitis. In this study, a rapid, sensitive and selective liquid chromatography tandem mass spectrometry (LC-MS/MS) method was developed for quantification of besifloxacin in rabbit plasma and ocu...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2015.08.023
更新日期:2016-01-05 00:00:00
abstract::A variety of hallucinogens of the lysergamide type has emerged on the drug market in recent years and one such uncontrolled derivative of lysergic acid diethylamide (LSD) is 1-propionyl-LSD (1P-LSD). Due to the high potency of LSD and some of its derivatives (common doses: 50-200 μg), sensitive methods are required fo...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2019.05.062
更新日期:2019-09-10 00:00:00
abstract::Protandim is an over-the-counter herbal dietary supplement. The key components of Protandim, i.e., epigallocatechin-3-gallate (EGCG), silibinin (SIL), and curcumin (CUR) were simultaneously analyzed through a liquid chromatography-tandem mass spectrometric (LC-MS/MS) method in plasma and different tissues after admini...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2019.03.024
更新日期:2019-06-05 00:00:00
abstract::Despite significant analytical improvements during this last decade, characterizing the whole integrity of monoclonal antibodies during their bioproduction remains a challenge. In this study, we report a new analytical approach to evaluate the overall heterogeneity/integrity of mAbs by LC-MS after combined proteolysis...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2017.11.046
更新日期:2018-02-05 00:00:00
abstract::A procedure based on liquid chromatography-mass spectrometry (LC-MS) is described for determination of caffeine, theobromine, theophylline, taurine in different dietary supplements. After addition of tryptophan as internal standard, both solid and liquid specimens were extracted with 4 ml of hexane/isopropanol (9:1). ...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2004.11.013
更新日期:2005-03-09 00:00:00
abstract::X-ray powder diffraction (XRPD) analysis of intact multi-component consolidated mixtures has significant potential owing to the ability to non-destructively quantify and discriminate between solid phases in composite bodies with minimal sample preparation. There are, however, limitations to the quantitative power usin...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2007.12.042
更新日期:2008-06-09 00:00:00
abstract::Results gained from in vivo metabolism could be more authentic to reflect the biotransformation of drugs than in vitro metabolism. This paper discusses the development and characterization of an analytical method for controlling tiamulin (TIA) and doxycycline (DOX) residues in pig plasma and urine, as well as their in...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2020.113428
更新日期:2020-10-25 00:00:00
abstract::The hydroxide-catalyzed non-enzymatic hydrolysis of cocaine is quantified in terms of ten site- and species-specific rate constants in connection with also ten site- and species-specific acid-base equilibrium constants, comprising all the twelve coexisting species in solution. This characterization involves the major ...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/j.jpba.2017.07.005
更新日期:2017-10-25 00:00:00
abstract::The five active drug substances and two of the excipients present in Frenadol, a cold medication, were separated. The active drug components dextromethorphan HBr monohydrate, ascorbic acid, caffeine, paracetamol and chlorpheniramine maleate were quantitatively assayed by a mixed ion pair LC method. The excipients sepa...
journal_title:Journal of pharmaceutical and biomedical analysis
pub_type: 杂志文章
doi:10.1016/0731-7085(94)80014-6
更新日期:1994-01-01 00:00:00