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butylated hydroxytoluene

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https://www.readbyqxmd.com/read/27886663/organic-impurity-profiling-of-methylone-and-intermediate-compounds-synthesized-from-catechol
#1
Erin Heather, Adam Bortz, Ronald Shimmon, Andrew M McDonagh
This work examined the synthesis and organic impurity profile of methylone prepared from catechol. The primary aim of this work was to determine whether the synthetic pathway used to prepare 3,4-methylenedioxypropiophenone could be ascertained through analysis of the synthesized methylone. The secondary aim was the structural elucidation and origin determination of the organic impurities detected in methylone and the intermediate compounds. The organic impurities present in the reaction products were identified using GC-MS and NMR spectroscopy...
November 25, 2016: Drug Testing and Analysis
https://www.readbyqxmd.com/read/27874826/optimization-and-validation-of-a-fast-uplc-method-for-simultaneous-determination-of-hydroquinone-kojic-acid-octinoxate-avobenzone-bha-and-bht
#2
Fanny Galimany-Rovira, Montse Miñarro-Carmona, Pilar Pérez-Lozano, Encarna García-Montoya, Josep R Ticó-Grau, Josep M Suñé-Negre
A previously published HPLC method for the simultaneous determination of six major components (hydroquinone, kojic acid, octinoxate, avobenzone, butylated hydroxyanisole, and butylated hydroxytoluene) in a skin-whitening cream was transferred and optimized to an ultra-performance LC system. Separation was achieved in a ZORBAX SB-Phenyl Rapid-Resolution High Throughput column (2.1 × 100 mm, 1.8 μm), using a mobile phase consisting of water with 0.1% acetic acid and acetonitrile at a flow rate of 0.7 mL/min...
September 29, 2016: Journal of AOAC International
https://www.readbyqxmd.com/read/27859283/impact-of-pecan-nut-shell-aqueous-extract-on-the-oxidative-properties-of-margarines-during-storage
#3
Paula Cristina Engler Ribeiro, Priscila de Britto Policarpi, Andrea Dal Bo, Pedro Alberto Barbetta, Jane Mara Block
BACKGROUND: The oxidative properties of margarines supplemented with pecan nut shell extracts, rosemary extract and butylated hydroxytoluene (BHT) were investigated RESULTS: The extracts of pecan nut shell and rosemary showed a high content of total phenolics and condensed tannins (93 and 102.9 mg GAE g(-1) and 46 and 38.9 mg CE g(-1) , respectively) as well as a high antioxidant activity (1257 and 2306 µmol TEAC g(-1) , and 293 and 856 mg TEAC g(-1) for ABTS and DPPH methods, respectively)...
November 17, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27835835/effect-of-natural-antioxidants-in-spanish-salchich%C3%A3-n-elaborated-with-encapsulated-n-3-long-chain-fatty-acids-in-konjac-glucomannan-matrix
#4
P E S Munekata, R Domínguez, D Franco, R Bermúdez, M A Trindade, Jose M Lorenzo
The effect of natural antioxidants on physicochemical properties, lipid and protein oxidation, volatile compounds and free fatty acids (FFA) were determined in Spanish salchichón enriched with n-3 fatty acids encapsulated and stabilized in konjac matrix. Phenolic compounds of beer residue extract (BRE), chestnut leaves extract (CLE) and peanut skin extract (PSE) were also identified and quantified. Five batches of salchichón were prepared: control (CON, without antioxidants), butylated hydroxytoluene (BHT), BRE, CLE and PSE...
November 5, 2016: Meat Science
https://www.readbyqxmd.com/read/27804907/effect-of-dietary-supplementation-of-grape-seed-extract-on-the-growth-performance-lipid-profile-antioxidant-status-and-immune-response-of-broiler-chickens
#5
M H Farahat, F M Abdallah, H A Ali, A Hernandez-Santana
Grape seed extracts (GSE) contain several beneficial bioactive constituents; therefore, can be utilized as a potential feed additive in broiler chickens. An experiment was conducted to investigate the effect of supplementation of broiler chicken diets with GSE as a natural antioxidant at levels of 125, 250, 500, 1000 and 2000 ppm on the growth performance, serum lipid profile, liver glutathione-reduced, thigh muscle malondialdehyde and humoral immune response against Newcastle disease virus vaccines. This experiment was performed during the life-span of chickens from 0 to 42 days of age...
November 2, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27775656/rp-hplc-ms-ms-analysis-of-the-phenolic-compounds-antioxidant-and-antimicrobial-activities-of-salvia-l-species
#6
Hatice Tohma, Ekrem Köksal, Ömer Kılıç, Yusuf Alan, Mustafa Abdullah Yılmaz, İlhami Gülçin, Ercan Bursal, Saleh H Alwasel
The identification and quantification of the phenolic contents of methanolic extracts of three Salvia L. species namely S. brachyantha (Bordz.) Pobed, S. aethiopis L., and S. microstegia Boiss. and Bal. were evaluated using reverse phase high performance liquid chromatography, UV adsorption, and mass spectrometry (RP-HPLC/MS). In order to determine the antioxidant capacity of these species, cupric ions (Cu(2+)) reducing assay (CUPRAC) and ferric ions (Fe(3+)) reducing assay (FRAP) were performed to screen the reducing capacity and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay was employed for evaluation of the radical scavenging activity for both solvents...
October 21, 2016: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/27725206/comparative-analysis-of-antioxidant-and-antiproliferative-activities-of-rhodomyrtus-tomentosa-extracts-prepared-with-various-solvents
#7
Hazrulrizawati Abd Hamid, Roziasyahira Mutazah, Mashitah M Yusoff, Nurul Ashikin Abd Karim, Ahmad Faizal Abdull Razis
Rhodomyrtus tomentosa (Aiton) Hassk. has a wide spectrum of pharmacological effects and has been used to treat wounds, colic diarrhoea, heartburns, abscesses and gynaecopathy. The potential antiproliferative activities of R. tomentosa extracts from different solvents were evaluated in vitro on HepG2, MCF-7 and HT 29 cell lines while antioxidant activity was monitored by radical scavenging assay (DPPH), copper reducing antioxidant capacity (CUPRAC) and β-carotene bleaching assay. Extracts from R. tomentosa show the viability of the cells in concentration-dependent manner...
October 7, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27719940/mechanisms-and-kinetics-of-tryptophan-n-nitrosation-in-a-gastro-intestinal-model
#8
Diane de La Pomélie, Véronique Santé-Lhoutellier, Philippe Gatellier
The reaction of nitrite with different amino acids containing secondary amino groups was tested under simulated in-vitro conditions of the digestive tract. After treatment, tryptophan was the only amino acid that exhibited specific UV absorbance of nitrosamines at 335nm, supporting the assumption that it is the main source of endogenous nitrosamines. The combined effect of pH (from 2 to 6.5) and nitrite (from 0.1 to 20mM) was analyzed and the mechanisms and kinetic laws of tryptophan N-nitrosation were determined...
March 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27699449/analysis-of-pesticides-and-toxic-heavy-metals-contained-in-mosquito-coils
#9
John Kasumba, Bryan Hettick, Amanda French, Jeffrey K Wickliffe, Maureen Y Lichtveld, William B Hawkins, Alies van Sauers-Muller, David Klein
In this study, 10 mosquito coils manufactured in China were obtained in Suriname, South America, where they are used extensively. The coils were analyzed for organics (allethrin, permethrin, and butylated hydroxytoluene) and heavy metals (Cr, Co, As, Cd, and Pb) by GC-MS and ICP-MS, respectively. Allethrin was the only target organic compound detected in all mosquito coils with concentrations ranging from ~1900 to ~4500 µg/g. The concentrations of heavy metals varied as follows (in µg/g): Cr: 2.9-9.4, Co: 0...
November 2016: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27695265/in-vitro-antioxidant-activities-and-polyphenol-contents-of-seven-commercially-available-fruits
#10
Paramita Basu, Camelia Maier
BACKGROUND: Fruits are considered one of the richest sources of natural antioxidants. Their consumption has been linked to the prevention of oxidative stress-induced diseases. OBJECTIVE: In this study, in vitro antioxidant activities of blueberry, jackfruit, blackberry, black raspberry, red raspberry, strawberry, and California table grape extracts were evaluated. MATERIALS AND METHODS: Antioxidant activities were determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant potential (FRAP), 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), nitric oxide (NO), superoxide anion (O2(-)) scavenging assays, and ferric reducing power...
October 2016: Pharmacognosy Research
https://www.readbyqxmd.com/read/27692573/new-specific-and-sensitive-biomonitoring-methods-for-chemicals-of-emerging-health-relevance
#11
Gabriele Leng, Wolfgang Gries
In this publication the challenges to cope for the aim to obtain innovative biomonitoring methods in our laboratory are visualized for di(2-propylheptyl)phthalate, 2-mercaptobenzothiazole, 3,5-di-tert-butyl-4-hydroxytoluene, 4-nonylphenol, 4-tert-octylphenol, 3-(4-methylbenzylidene)camphor, 4,4'-methylene diphenyl diisocyanate, and Hexabromocyclododecane. For these substances new specific markers were explored based on animal or human kinetic data with urine being the preferred matrix compared to blood. The determination of these markers was complex in all cases, because the sample preparation as well as the detection by high performance liquid chromatography, capillary gas chromatography coupled to tandem mass spectrometers or high resolution mass spectrometry should enable the lowest possible detection limit by use of minimal biological sample volumes...
September 20, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27627183/unprecedented-antioxidative-cyclic-ether-from-the-red-seaweed-kappaphycus-alvarezii-with-anti-cyclooxygenase-and-lipoxidase-activities
#12
Fasina Makkar, Kajal Chakraborty
An unprecedented non-isoprenoid oxocine carboxylate cyclic ether characterised as (3S, 4R, 5S, 6Z)-3-((R)-hexan-2'-yl)-3,4,5,8-tetrahydro-4-methyl-2H-oxocin-5-yl acetate was isolated from the ethyl acetate-methanol extract of the red seaweed Kappaphycus alvarezii. The structure, as well as its relative stereochemistry, was proposed on the basis of extensive spectral data. The antioxidative activity of the isolated metabolite was found to have significantly greater as determined by 1, 1-diphenyl-2-picrylhydrazyl and 2,2'-azino-bis-3-ethylbenzothiozoline-6-sulfonic acid radical scavenging activities (IC50 ~ 0...
September 14, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27625117/determination-of-selected-fatty-acids-in-dried-sweat-spot-using-gas-chromatography-with-flame-ionization-detection
#13
Roman Kanďár, Petra Drábková, Lenka Andrlová, Adam Kostelník, Alexander Čegan
A method is described for the determination of fatty acids in dried sweat spot and plasma samples using gas chromatography with flame ionization detection. Plasma and dried sweat spot samples were obtained from a group of blood donors. The sweat was collected from each volunteer during exercise. Sweat was spotted onto collection paper containing butylated hydroxytoluene. Fatty acids were derivatized with acetyl chloride in methanol to form methyl esters of fatty acids. The fatty acids in dried sweat spot samples treated with butylated hydroxytoluene and stored at -20°C were stable for 3 months...
September 13, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27589711/chemical-composition-antioxidant-and-antibacterial-activity-of-wood-vinegar-from-litchi-chinensis
#14
Jyh-Ferng Yang, Cheng-Hong Yang, Ming-Tsai Liang, Zi-Jie Gao, Yuh-Wern Wu, Li-Yeh Chuang
The antioxidant and antibacterial activities of wood vinegar from Litchi chinensis, and its components have been studied. The chemical compositions of wood vinegar were analyzed by gas chromatography-mass spectrometry (GC-MS). A total of 17 chemical compounds were identified, representing 83.96% of the compositions in the wood vinegar. Three major components, included 2,6-dimethoxyphenol (syringol, 29.54%), 2-methoxyphenol (guaiacol, 12.36%), and 3,5-dimethoxy-4-hydroxytoluene (11.07%), were found in the wood vinegar...
2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27567600/anti-adenovirus-activity-antioxidant-potential-and-phenolic-content-of-black-tea-camellia-sinensis-kuntze-extract
#15
Ali Karimi, Mohammad-Taghi Moradi, Somayeh Alidadi, Leila Hashemi
BackgroundAdenovirus (ADV) causes a number of diseases in human, and to date, no specific antiviral therapy is approved against this virus. Thus, searching for effective anti-ADV agents seems to be an urgent requirement. Many studies have shown that components derived from medicinal plants have antiviral activity. Therefore, the present study was aimed to evaluate in vitro anti-ADV activity and also antioxidant potential and total phenolic compounds of black tea (Camellia sinensis) crude extract. MethodsIn this study, the hydroalchoholic extract of black tea was prepared and its anti-ADV activity was evaluated on HEp2 cell line using MTT [3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide] assay...
December 1, 2016: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/27563225/assessment-of-the-polyphenolic-content-free-radical-scavenging-anti-inflammatory-and-antimicrobial-activities-of-acetone-and-aqueous-extracts-of-lippia-javanica-burm-f-spreng
#16
Abiola M Asowata-Ayodele, Gloria A Otunola, Anthony J Afolayan
BACKGROUND: Lippia javanica (Burm.F.) Spreng is one of the spice plants commonly found in almost every part of South Africa. Apart from its culinary uses, it is also traditionally used as an insect repellant and infusion for fever, flu, kidney stone treatment, cough, common cold, and chest pain. MATERIALS AND METHODS: The antioxidant activities of the aqueous and acetone extracts were determined by measuring their effects against 1,1-Diphenyl-2-picryl-hydrazyl, 2,2'azino-bis (3-ethylbenzthiazoline-6-sulfonic acid), nitric oxide, phosphomolybdate, lipid peroxidation, hydrogen peroxide, and reducing power...
May 2016: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/27545020/cosmetics-use-and-age-at-menopause-is-there-a-connection
#17
REVIEW
Erika T Chow, Shruthi Mahalingaiah
Cosmetics contain a vast number of chemicals, most of which are not under the regulatory purview of the Food and Drug Administration. Only a few of these chemicals have been evaluated for potential deleterious health impact: parabens, phthalates, polycyclic aromatic hydrocarbons, and siloxanes. A review of the ingredients in the best-selling and top-rated products of the top beauty brands in the world, as well as a review of highlighted chemicals by nonprofit environmental organizations, reveals 11 chemicals and chemical families of concern: butylated hydroxyanisole/butylated hydroxytoluene, coal tar dyes, diethanolamine, formaldehyde-releasing preservatives, parabens, phthalates, 1,4-dioxane, polycyclic aromatic hydrocarbons, siloxanes, talc/asbestos, and triclosan...
September 15, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27536381/effects-of-injection-of-hydrolysis-plasma-protein-solution-on-the-antioxidant-properties-in-porcine-m-longissimus-lumborum
#18
Hyun-Woo Seo, Jin-Kyu Seo, Han-Sul Yang
BACKGROUND: Plasma protein hydrolysates have been shown to possess antioxidant activity. However, no report has yet to examine the antioxidant effects of injection of plasma protein hydrolysates on meat quality. Therefore, in this study, the effects of injection of hydrolysis plasma protein solution on meat quality and storability were investigated in porcine M. longissimus lumborum. METHODS: Twelve pigs were randomly selected at a commercial slaughter plant and harvested...
2016: Journal of Animal Science and Technology
https://www.readbyqxmd.com/read/27522571/synthetic-phenolic-antioxidants-including-butylated-hydroxytoluene-bht-in-resin-based-dental-sealants
#19
Wei Wang, Pranav Kannan, Jingchuan Xue, Kurunthachalam Kannan
Resin-based dental sealants (also referred to as pit-and-fissure sealants) have been studied for their contribution to bisphenol A (BPA) exposure in children. Nevertheless, little attention has been paid to the occurrence of other potentially toxic chemicals in dental sealants. In this study, the occurrence of six synthetic phenolic antioxidants (SPAs), including 2,6-di-tert-butyl-4-hydroxytoluene (BHT), 2,6-di-tert-butyl-4-(hydroxyethyl)phenol (BHT-OH), 3,5-di-tert-butyl-4-hydroxy-benzaldehyde (BHT-CHO), 2,6-di-tert-butylcyclohexa-2,5-diene-1,4-dione (BHT-Q), 3,5-di-tert-butyl-4-hydroxybenzoic acid (BHT-COOH) and 2-tert-butyl-4-methoxyphenol (BHA), was examined in 63 dental sealant products purchased from the U...
August 11, 2016: Environmental Research
https://www.readbyqxmd.com/read/27499701/dried-blood-spot-omega-3-and-omega-6-long-chain-polyunsaturated-fatty-acid-levels-in-7-9-year-old-zimbabwean-children-a-cross-sectional-study
#20
Grace Mashavave, Patience Kuona, Willard Tinago, Babill Stray-Pedersen, Marshall Munjoma, Cuthbert Musarurwa
BACKGROUND: Omega-3 long chain-polyunsaturated fatty acids (LC-PUFAs)-docosahexaenoic acid (DHA), docosapentaenoic acid (DPA) and eicosapentaenoic acid (EPA)- and omega-6 LC-PUFA arachidonic acid (ARA), are essential for optimum physical and mental development in children. Prior to this study, the blood omega-3 LC-PUFA levels were unknown in Zimbabwean children, particularly in those aged 7-9 years, despite the documented benefits of LC-PUFAs. Documentation of the LC-PUFA levels in this age group would help determine whether interventions, such as fortification, are necessary...
2016: BMC Clinical Pathology
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