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https://www.readbyqxmd.com/read/28631270/comparison-of-in-vivo-toxicity-antioxidant-and-immunomodulatory-activities-of-coconut-nipah-and-pineapple-juice-vinegars
#1
Nurul Elyani Mohamad, Swee KeongYeap, Boon Keen Beh, Muhammad Firdaus Romli, Hamidah Mohd Yusof, Ye Wen Kristeen-Teo, Shaiful Adzni Sharifuddin, Kamariah Long, Noorjahan Banu Alitheen
BACKGROUND: Vinegar is widely used as a food additive, in food preparation and as a food supplement. This study compared the phenolic acid profiles and in vivo toxicities, and antioxidant and immunomodulatory effects of coconut, nipah and pineapple juice vinegars, which were respectively prepared via a two-step fermentation using Saccharomyces cerevisiae 7013 INRA and Acetobacter aceti vat Europeans. RESULTS: Pineapple juice vinegar, which had the highest total phenolic acid content, also exhibited the greatest in vitro antioxidant capacity compared to coconut juice and nipah juice vinegars...
June 20, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28628838/validated-uplc-ms-ms-method-for-simultaneous-quantification-of-eight-saikosaponins-in-rat-plasma-application-to-a-comparative-pharmacokinetic-study-in-depression-rats-after-oral-administration-of-extracts-of-raw-and-vinegar-baked-bupleuri-radix
#2
Tianli Lei, Dandan Zhang, Kun Guo, Mingxiao Li, Chongning Lv, Jing Wang, Lingyun Jia, Jincai Lu
A sensitive and efficient UPLC-MS/MS method was developed and validated for simultaneous quantification of eight saikosaponins (SSa, SSb1, SSb2, SSb3, SSb4, SSc, SSd and SSf) in rat plasma. Furthermore, comparative pharmacokinetic profiles of these sakosaponins were investigated, following oral administration of extracts of raw and vinegar-baked Bupleuri Radix to depression rats. Biosamples were processed with liquid-liquid extraction technique using ethyl acetate. Chromatographic separation was accomplished on Waters BEH C18 UPLC column...
June 16, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28628837/the-influence-of-essential-oils-from-xiang-fu-si-wu-decoction-on-its-non-volatile-components-and-its-application-for-pharmacokinetics-in-normal-rats
#3
Ying Pan, Dawei Qian, Pei Liu, Yang Zhang, Zhenhua Zhu, Li Zhang, Jin-Ao Duan
Xiang-Fu-Si-Wu Decoction (XFSWD) has been used to treat gynecology diseases in clinical practice for hundreds of years in China, especially for primary dysmenorrheal of QiZhi Type. In previous researches, both essential oils (XEO) and non-volatile components (NXEO) extracted from XFSWD showed significant pharmacological activities, but the influence of XEO on NXEO was unclear. The purpose of this paper was to develop a validated analytical method for simultaneous determination of ten components including Vanillic acid, Ferulic acid, Caffeic acid, Gallic acid, Paeoniflorin, Albiflorin, Tetrahydropalmatine, Protopine, Berberine and Tetrahydrocolumbamine, and to compare the pharmacokinetic parameters of these components to illustrate the influences of XEO on NXEO in normal rats...
June 4, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28624131/studying-arterial-stiffness-using-high-frequency-ultrasound-in-mice-with-alzheimer-disease
#4
Chin-Chia Huang, Hsiang-Fan Cheng, Ben-Peng Zhu, Pei-Yu Chen, Suet Theng Beh, Yu-Min Kuo, Chih-Chung Huang
Alzheimer disease (AD) is an irreversible, progressive brain disorder that causes slow loss of memory and thinking skills, normally leading to death in 3-9 y. The etiology of AD is not fully understood but is widely believed to be induced by the production and deposition of amyloid-β peptide in the brain. Recently, a correlation was discovered between amyloid-β deposition and atherosclerosis in the cerebral arteries of postmortem brains, indicating that amyloid-β promotes atherogenesis and that in turn atherosclerosis promotes brain amyloid-β accumulation...
June 14, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28617033/a-uplc-ms-ms-method-for-quantification-of-5%C3%AE-androst-3%C3%AE-5-6%C3%AE-triol-in-human-plasma-development-validation-and-its-application-in-clinical-pharmacokinetic-study
#5
Zhenlei Wang, Huanhuan Wang, Pei Hu, Ji Jiang, Qian Zhao
AIM: 5α-androst-3β,5,6β-triol is a novel ischemic stroke drug under clinical development. The objective of this study was to develop and validate a simple ultraperformance liquid chromatography tandem mass spectrometry method for 5α-androst-3β,5,6β-triol in human plasma and its application in clinical pharmacokinetic study. Methodology & results: After being pretreated using an automatized solid-phase extraction procedure, plasma sample was separated on a Waters(®) Acquity™ BEH C18 column (2...
June 15, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28610798/ideal-versus-real-automated-twin-column-recycling-chromatography-process
#6
Fabrice Gritti, Mike Leal, Thomas McDonald, Martin Gilar
The full baseline separation of two compounds (selectivity factors α<1.03) is either impractical (too long analysis times) or even impossible when using a single column of any length given the pressure limitations of current LC instruments. The maximum efficiency is that of an infinitely long column operated at infinitely small flow rates. It is determined by the maximum allowable system pressure, the column permeability (particle size), the viscosity of the eluent, and the intensity of the effective diffusivity of the analytes along the column...
June 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28600961/uplc-ms-ms-assay-for-identification-and-quantification-of-brivaracetam-in-plasma-sample-application-to-pharmacokinetic-study-in-rats
#7
Muzaffar Iqbal, Essam Ezzeldin, Khalid A Al-Rashood
Brivaracetam (BVR) is a novel antiepileptic drug (AED), approved clinically for the treatment of partial onset seizures in adults and adolescents. It has some abuse potential and assigned to Schedule V category under the Controlled Substance Act by the Drug Enforcement Administration. Being an AED and drug of abuse, a sensitive and robust assay is necessary for determination of BVR in biological fluids. Herein, we report a sensitive and validated UPLC-MS/MS assay for identification and quantification of BVR in plasma samples...
June 4, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28592165/self-concealment-mediates-the-relationship-between-perfectionism-and-attitudes-toward-seeking-psychological-help-among-adolescents
#8
Abbas Abdollahi, Simin Hosseinian, Ahmad Beh-Pajooh, Per Carlbring
One of the biggest barriers in treating adolescents with mental health problems is their refusing to seek psychological help. This study was designed to examine the relationships between two forms of perfectionism, self-concealment and attitudes toward seeking psychological help and to test the mediating role of self-concealment in the relationship between perfectionism and attitudes toward seeking psychological help among Malaysian high school students. The participants were 475 Malaysian high school students from four high schools in Kuala Lumpur, Malaysia...
January 1, 2017: Psychological Reports
https://www.readbyqxmd.com/read/28578813/multiclass-method-for-the-determination-of-pharmaceuticals-and-personal-care-products-in-compost-from-sewage-sludge-using-ultrasound-and-salt-assisted-liquid-liquid-extraction-followed-by-ultrahigh-performance-liquid-chromatography-tandem-mass-spectrometry
#9
A Luque-Muñoz, J L Vílchez, A Zafra-Gómez
An analytical method for the analysis of 16 pharmaceuticals and personal care products in compost from sewage sludge is successfully validated. Ultrasound assisted extraction with a mixture of acetonitrile:ethyl acetate (1:1, v/v) containing 10% (v/v) of acetic acid was carried out. Two cycles of extraction of 10min were applied. A clean-up of the extracts using salt-assisted liquid-liquid extraction (SALLE) was also included. Experimental design was used for the optimization of the main parameters involved in the extraction and cleaned-up steps...
May 26, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28559101/bovine-enzootic-haematuria-from-consumption-of-pteris-deflexa-and-pteris-plumula-in-northwestern-argentina
#10
Juan Francisco Micheloud, Luis Adrián Colque-Caro, Olga Gladys Martinez, Eduardo Juan Gimeno, Debora da Silva Freitas Ribeiro, Benito Soto Blanco
Bovine enzootic haematuria (BEH) is caused by prolonged ingestion of toxic principles of bracken fern, essentially by Pteridium spp. In northwestern Argentina, this disease has a great economic impact ant it is attributed a chronic consumption to Pteridium arachnoideum. This paper describes two endemic areas for enzootic hematuria due to the consumption of Pteris deflexa and Pteris plumula. Two areas where P. deflexa and P. plumula are endemic, but free of Pteridium species, were devised and seven farms were visited...
May 27, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28558340/dynamic-changes-of-flavonoids-in-abelmoschus-manihot-different-organs-at-different-growth-periods-by-uplc-ms-ms
#11
Xinxin Pan, Leyue Du, Jinhua Tao, Shu Jiang, Dawei Qian, Jinao Duan
Abelmoschus manihot (Linn.) Medicus has been clinically used to treat chronic kidney disease, oral ulcers, burns, and dysmenorrhea in China for many centuries. The major pharmacologically-active components of A. manihot are flavonoids. In this study, a rapid and highly sensitive UPLC-MS/MS analysis method was established and successfully applied to the simultaneous determination of five major flavonoids (rutin, hyperoside, isoquercitrin, quercetin, and myricetin) in different parts of A. manihot harvested at ten growth periods...
August 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28556266/identification-of-stress-degradation-products-of-iloperidone-using-liquid-chromatography-coupled-with-orbitrap-mass-spectrometer
#12
Sukanya Pandeti, Tofan Kumar Rout, T Narender, Thota Jagadeshwar Reddy
RATIONALE: Iloperidone (ILOP) is atypical antipsychotic drug used for the treatment of schizophrenia and related psychotic disorders. Comprehensive stress testing of ILOP drug was carried out as per ICH guidelines to understand the degradation profile of the drug. The presence of degradation products in a drug affects not only the quality, but also the safety and efficacy of drug formulation. Thus, it is essential to develop an efficient analytical method which could be useful for the separation, identification and characterization of all possible degradation products of ILOP...
May 26, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28553515/molecular-catalysis-at-polarized-interfaces-created-by-ferroelectric-batio3
#13
Eugene S Beh, Sergey A Basun, Xiaofeng Feng, Ighodalo U Idehenre, Dean R Evans, Matthew W Kanan
The local environment at polarized solid-liquid interfaces provides a unique medium for chemical reactions that could be exploited to control the selectivity of non-faradaic reactions. Polarized interfaces are commonly prepared by applying a voltage to an electrode in an electrolyte solution, but it is challenging to achieve high surface charge densities while suppressing faradaic reactions. Ferroelectric materials have permanent surface charge densities that arise from the dipole moments of ferroelectric domains and can be used to create polarized solid-liquid interfaces without applying a voltage...
April 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28541672/impacts-of-unregulated-novel-brominated-flame-retardants-on-human-liver-thyroid-deiodination-and-sulfotransferation
#14
Tristan A Smythe, Craig M Butt, Heather M Stapleton, Kerri Pleskach, Geemitha Ratnayake, Chae Yoon Song, Nicole Riddell, Alex Konstantinov, Gregg T Tomy
The inhibitory effects of five novel brominated flame retardants, 1,2-bis(2,4,5-tribromophenoxy)ethane (BTBPE), decabromodiphenylethane (DBDPE), 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB), bis(2-ethylhexyl)tetrabromophthalate (BEH-TEBP), and β-tetrabromoethylcyclohexane (β-TBECH), on thyroid hormone deiodinase (DIO) and sulfotransferase (SULT) activity were investigated using human in vitro liver microsomal and cytosolic bioassays. Enzymatic activity was measured by incubating active human liver subcellular fractions with thyroid hormones (T4 and rT3 separately) and measuring changes in thyroid hormone (T4, T3, rT3, and 3,3'-T2) concentrations...
June 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28535452/highly-sensitive-uhplc-ms-ms-method-for-the-simultaneous-estimation-of-propafenone-and-its-metabolites-5-hydroxypropafenone-and-n-depropylpropafenone-on-human-dried-blood-spots-technique-and-application-to-a-pharmacokinetic-study
#15
Adinarayana Andy, Raja Reddy Kallem, Ramesh Mullangi, Divya Andy, J V L N Seshagiri Rao
A highly sensitive, rapid and selective UHPLC-MS/MS method has been developed and validated for quantification of the propafenone (PF), 5-hydroxypropafenone (5-OHPF) and N-depropylpropafenone (N-DPF) on human dried blood spot (DBS). The assay procedure involves a solid-liquid extraction of PF, 5-OHPF and N-DPF and amlodipine (internal standard, I.S.) from dried human DBS cards using water and acetonitrile. The chromatographic resolution was achieved on a BEH C18 column using a gradient mobile phase consisting of 0...
May 11, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28531844/development-of-an-uplc-ms-ms-method-for-simultaneous-quantitation-of-11-d-amino-acids-in-different-regions-of-rat-brain-application-to-a-study-on-the-associations-of-d-amino-acid-concentration-changes-and-alzheimer-s-disease
#16
Zhe Li, Yuping Xing, Xingjie Guo, Yan Cui
There are significant differences in d-amino acid concentrations between healthy people and Alzheimer's disease patients. In order to investigate the potential correlation between d-amino acids and Alzheimer's disease, a simple and sensitive ultra high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method has been developed. The method was applied to simultaneous determination of 11 d-amino acids in different regions of rat brain. Rat brain homogenates were firstly pretreated with protein precipitation procedure and then derivatized with (S)-N-(4-nitrophenoxycarbonyl) phenylalanine methoxyethyl ester [(S)-NIFE]...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28528664/enhanced-lc-ms-ms-analysis-of-alogliptin-and-pioglitazone-in-human-plasma-applied-to-a-preliminary-pharmacokinetic-study
#17
Maha F Abdel-Ghany, Miriam F Ayad, Mariam M Tadros
A new fast LC-MS/MS method was developed for determination of alogliptin and pioglitazone in human plasma. Linearity ranges of 10-400ngmL(-1) for alogliptin and 25-2000ngmL(-1) for pioglitazone, were found to be suitable for their bioanalysis covering the Cmin and Cmax values of the drugs. Direct precipitation technique was used for simultaneous extraction of the drugs successfully from human plasma samples. Chromatographic separation was achieved on a BEH C18 column (50mm×2.1mm, 1.7μm) with 0.1% aqueous formic acid: acetonitrile (40:60, v/v) at a flow rate of 0...
July 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28522842/cryo-electron-microscopy-structure-of-the-macrobrachium-rosenbergii-nodavirus-capsid-at-7-angstroms-resolution
#18
Kok Lian Ho, Chare Li Kueh, Poay Ling Beh, Wen Siang Tan, David Bhella
White tail disease in the giant freshwater prawn Macrobrachium rosenbergii causes significant economic losses in shrimp farms and hatcheries and poses a threat to food-security in many developing countries. Outbreaks of Macrobrachium rosenbergii nodavirus (MrNV), the causative agent of white tail disease (WTD) are associated with up to 100% mortality rates. There are no interventions available to treat or prevent MrNV disease however. Here we show the structure of MrNV virus-like particles (VLPs) produced by recombinant expression of the capsid protein, using cryogenic electron microscopy...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28494351/development-and-validation-of-a-sensitive-uplc-ms-ms-instrumentation-and-alkaline-nitrobenzene-oxidation-method-for-the-determination-of-lignin-monomers-in-wheat-straw
#19
Mengjing Zheng, Shubo Gu, Jin Chen, Yongli Luo, Wenqian Li, Jun Ni, Yong Li, Zhenlin Wang
A method to determine the lignin monomers (p-hydroxybenzaldehyde, vanillin and syringaldehyde) in plant cell wall of wheat internode was developed and validated using a high-throughput nitrobenzene oxidation step and ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) for quantification. UPLC analyses were carried out using an reversed phase C18 column (ACQUITY UPLC BEH, 1.7μm, 2.1×100mm) and gradient elution with water and acetonitrile. This method was completely validated in terms of analyzing speed, linearity, sensitivity, limits of detection (LODs) and limits of quantification (LOQs)...
June 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28486433/human-indoor-exposure-to-airborne-halogenated-flame-retardants-influence-of-airborne-particle-size
#20
Mark J La Guardia, Erika D Schreder, Nancy Uding, Robert C Hale
Inhalation of halogenated flame-retardants (HFRs) released from consumer products is an important route of exposure. However, not all airborne HFRs are respirable, and thus interact with vascular membranes within the gas exchange (alveolar) region of the lung. HFRs associated with large (>4 µm), inhalable airborne particulates are trapped on the mucosal lining of the respiratory tract and then are expelled or swallowed. The latter may contribute to internal exposure via desorption from particles in the digestive tract...
May 9, 2017: International Journal of Environmental Research and Public Health
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