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249467

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E Patricia Owen et al.
Pediatric nephrology (Berlin, Germany), 30(4), 595-601 (2014-10-19)
The mutations responsible for cystinosis in South African patients are currently unknown. A pertinent question is whether they are similar to those described elsewhere in the world. Children who were being managed for cystinosis in the Western Cape Province of...
Nađa Kostić et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 962, 102-108 (2014-06-09)
This paper presents a LC-MS/MS method for the determination of antiepileptic drug vigabatrin in dried plasma spots (DPS). Due to its zwitterionic chemical structure, a pre-column derivatization procedure was performed, aiming to yield enhanced ionization efficiency and improved chromatographic behaviour....
Nađa Kostić et al.
Journal of pharmaceutical and biomedical analysis, 109, 79-84 (2015-03-15)
In this paper, novel LC-MS/MS methods for the determination of antiepileptic drug pregabalin in dried matrix spots (DMS) are presented. This attractive technique of sample collection in micro amount was utilized in the form of dried blood spots (DBS) and...
Nur Cebi et al.
Food chemistry, 248, 8-13 (2018-01-14)
An effective and simultaneous liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was used with the aim of quantifying monosodium glutamate (MSG) in foodstuffs, such as chips, taste cubes, sauces and soups. The results were linear (R
Douglas R Bolster et al.
The Journal of nutrition (2018-06-14)
Higher-protein meals (>25 g protein/meal) have been associated with enhanced satiety but the role of amino acids is unclear. Leucine has been proposed to stimulate satiety in rodents but has not been assessed in humans. We assessed the acute effects...
Marcello Monteleone et al.
Analytica chimica acta, 759, 66-73 (2012-12-25)
Homovanillic acid (HVA), vanylmandelic acid (VMA), and 5-hydroxyindoleacetic acid (5-HIAA) are the metabolites of some catecholamines such as epinephrine, nor-epinephrine, dopamine and serotonin and their quantification is used in the diagnosis and management of patients with neurocrine tumors. A novel...
Laura Louise Scott et al.
Neurotoxicity research, 33(1), 6-14 (2017-05-05)
Chronic inhalation of aerosolized β-N-methylamino-L-alanine (BMAA) could serve as potenital route for exposure to this cyanobacterial neurotoxin implicated in the development of neurodegenerative disease. We investigated environmental aerosol BMAA loads and the fate of inhaled isotopically labeled aerosolized BMAA in...
Nikolaos Kritikos et al.
Journal of chromatography. A, 1403, 70-80 (2015-06-06)
In the current study, quantitative structure-retention relationships (QSRR) were constructed based on data obtained by a LC-(ESI)-QTOF-MS/MS method for the determination of amino acid analogues, following their derivatization via chloroformate esters. Molecules were derivatized via n-propyl chloroformate/n-propanol mediated reaction. Derivatives...
Brendan J Main et al.
Harmful algae, 74, 10-18 (2018-05-05)
The emerging toxin β-methylamino-l-alanine (BMAA) has been linked to the development of a number of neurodegenerative diseases in humans including amyotrophic lateral sclerosis (ALS), Alzheimer's disease, and Parkinson's disease. BMAA has been found to be produced by a range of...
Juqing Huang et al.
International journal of biological macromolecules, 125, 27-34 (2018-12-07)
BSH-1 is an O‑acetyl-arabinoxylan obtained from bamboo shavings. This study investigated its fermentation behavior by human colonic microbiota in vitro. Results showed that BSH-1 remarkably modulated the composition of human colonic microbiota, mainly by increasing the growth of potential beneficial...
T Brooijmans et al.
Journal of chromatography. A, 1560, 63-70 (2018-05-19)
Pyrolysis - gas chromatography - (PyGC) is a common method to analyse the composition of natural and synthetic resins. The analysis of acid functionality in, for example, waterborne polyacrylates and polyurethanes polymers has proven to be difficult due to solubility...
Yiping Zhang et al.
Food & function, 12(2), 587-601 (2020-12-23)
Gut microbiota (GM) is considered to play an important role in obesity. Additionally, the impact of dietary fiber (DF) consumption on GM has been well established. Brown seaweeds are known to be a rich source of DF. However, the effect...
Jake P Violi et al.
Ecotoxicology and environmental safety, 172, 72-81 (2019-01-27)
Environmental exposure to the amino acid β-methylamino-L-alanine (BMAA) was linked to the high incidence of neurodegenerative disease first reported on the island of Guam in the 1940s and has more recently been implicated in an increased incidence of amyotrophic lateral...
Guo-Wu Rao et al.
Acta crystallographica. Section C, Crystal structure communications, 59(Pt 5), o281-o282 (2003-05-14)
The title compound, C(22)H(24)N(4)O(4), was prepared from propyl chloroformate and 3,6-diphenyl-1,2-dihydro-s-tetrazine. This reaction yields the title compound rather than dipropyl 3,6-diphenyl-1,4-dihydro-s-tetrazine-1,4-dicarboxylate. The 2,3-diazabutadiene group in the central six-membered ring is not planar; the C=N double-bond length is 1.285 (2) A...
Gao Chen et al.
The ISME journal, 14(4), 959-970 (2020-01-08)
Dichloromethane (DCM) is an anthropogenic pollutant with ozone destruction potential that is also formed naturally. Under anoxic conditions, fermentation of DCM to acetate and formate has been reported in axenic culture Dehalobacterium formicoaceticum, and to acetate, H2 and CO2 in...
Rosangela Elliani et al.
Journal of separation science, 43(15), 3061-3073 (2020-05-14)
In the following work, a new method for the analysis of the phthalate monoesters in human urine was reported. Phthalate monoesters are metabolites generated as a result of phthalate exposure. In compliance with the dictates of Green Analytical Chemistry, a...
Kristiane de Cássia Mariotti et al.
Journal of analytical toxicology, 38(7), 432-437 (2014-07-21)
Brazil is considered one of the countries with the highest number of amphetamine-type stimulant (ATS) users worldwide, mainly diethylpropion (DIE) and fenproporex (FEN). The use of ATS is mostly linked to diverted prescription stimulants and this misuse is widely associated...
Silvio Chericoni et al.
Journal of forensic sciences, 60(5), 1355-1359 (2015-08-25)
A sensitive and reliable method for extraction and quantification of benzoylecgonine (BZE) and cocaine (COC) in urine is presented. Propyl-chloroformate was used as derivatizing agent, and it was directly added to the urine sample: the propyl derivative and COC were...
Attilio Naccarato et al.
Analytica chimica acta, 810, 17-24 (2014-01-21)
The work aims at developing a simple and rapid method for the quantification of dopamine (DA), serotonin (5-HT) and norepinephrine (NE) in human urine. The urinary levels of these biogenic amines can be correlated with several pathological conditions concerning heart...
Ina Nemet et al.
Cell, 180(5), 862-877 (2020-03-07)
Using untargeted metabolomics (n = 1,162 subjects), the plasma metabolite (m/z = 265.1188) phenylacetylglutamine (PAGln) was discovered and then shown in an independent cohort (n = 4,000 subjects) to be associated with cardiovascular disease (CVD) and incident major adverse cardiovascular events (myocardial infarction...
Yingmei Dong et al.
Frontiers in pharmacology, 11, 549-549 (2020-05-21)
Dysbiosis of gut microbiota is a critical factor in the pathogenesis of asthma. Manipulating gut microbiota is a promising therapeutic intervention in asthma, and is being extensively studied. Gu-Ben-Fang-Xiao Decoction (GBFXD), derived from traditional Chinese medicine, is an effective and...
Yixing Sui et al.
Bioresource technology, 275, 145-152 (2018-12-26)
The microalga Dunaliella salina has been widely studied for carotenogenesis, yet its protein production for human nutrition has rarely been reported. This study unveils the effects of growth phase and light regime on protein and essential amino acid (EAA) levels...
Mark S Sisterson et al.
Environmental entomology, 46(2), 299-310 (2017-03-24)
Glassy-winged sharpshooters must feed as adults to produce mature eggs. Cowpea and sunflower are both readily accepted by the glassy-winged sharpshooter for feeding, but egg production on sunflower was reported to be lower than egg production on cowpea. To better...
Qiang Fei et al.
Analytical chemistry, 91(6), 4055-4062 (2019-02-26)
Absolute quantitation is a major challenge in metabolomics. Previously, we [ Nagana Gowda et al. Anal. Chem. 2018 , 90 , 2001 - 2009 ] showed that nuclear magnetic resonance (NMR) spectroscopy can guide absolute quantitation using mass spectrometry (MS);...
Min-Zhi Peng et al.
Clinica chimica acta; international journal of clinical chemistry, 495, 406-416 (2019-05-17)
Urea cycle disorders (UCD) are inborn errors of ammonia detoxification in which early diagnosis and treatment are critical to prevent metabolic emergencies. Unfortunately, the diagnosis was often and pronounced delayed. To improve diagnosis, we developed herein a liquid chromatography-tandem mass...