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butylated hydroxytoluene

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https://www.readbyqxmd.com/read/28423872/potential-antioxidant-and-lipid-peroxidation-inhibition-of-phyllanthus-acidus-leaf-extract-in-minced-pork
#1
Tuyen Thi Kim Nguyen, Chamroon Laosinwattana, Montinee Teerarak, Komkhae Pilasombut
Objective: This study was to investigate the effect of extraction solvents on antioxidant bio-active compounds as well as potential antioxidant and lipid peroxidation inhibition of Phyllanthus acidus leaf extract in minced pork. Methods: The effect of various solvent systems of water, 25%, 50%, 75% (v/v) ethanol in water and absolute ethanol on the extraction crude yield, total phenolic content, total flavonoid content and in vitro antioxidant activities of P. acidus leaves was determined...
April 19, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28416215/stir-bar-sorptive-extraction-and-liquid-chromatography-tandem-mass-spectrometry-determination-of-polar-and-non-polar-emerging-and-priority-pollutants-in-environmental-waters
#2
Irene Aparicio, Julia Martín, Juan Luis Santos, José Luis Malvar, Esteban Alonso
An analytical method based on stir bar sorptive extraction (SBSE) was developed and validated for the determination of environmental concern pollutants in environmental waters by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Target compounds include six water and oil repellents (perfluorinated compounds), four preservatives (butylated hydroxytoluene and three parabens), two plasticizers (bisphenol A and di(2-ethylhexyl)phthalate), seven surfactants (four linear alkylbenzene sulfonates, nonylphenol and two nonylphenol ethoxylates), a flame retardant (hexabromocyclododecane), four hormones, fourteen pharmaceutical compounds, an UV-filter (2-ethylhexyl 4-methoxycinnamate) and nine pesticides...
April 7, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28408278/study-on-the-chemical-and-microbial-composition-and-probiotic-characteristics-of-dominant-lactic-acid-bacteria-in-fermented-poultry-slaughterhouse-waste
#3
O Ashayerizadeh, B Dastar, F Samadi, M Khomeiri, A Yamchi, S Zerehdaran
This study aimed to evaluate the quality of fermented poultry slaughterhouse waste and isolate and identify the probiotic bacteria present in it. Poultry slaughterhouse waste samples supplemented with 5% starter culture and 0.2% propionic acid received one of four experimental treatments, which consisted of further supplementation with: (1) 10% molasses (M10); (2) 15% molasses (M15); (3) 10% molasses with 200ppm butylated hydroxytoluene (MB10); and (4) 15% molasses with 200ppm butylated hydroxytoluene (MB15)...
April 10, 2017: Waste Management
https://www.readbyqxmd.com/read/28375185/aromatic-plants-antioxidant-capacity-and-polyphenol-characterisation
#4
Charalampos Proestos, Theo Varzakas
The antioxidant properties and polyphenol content of some selected aromatic plants grown in Greece were studied. Plants were refluxed with 60% methanol after acid hydrolysis. The phenolic substances were quantified by High Performance Liquid Chromatography-Diode Array Detector (HPLC-DAD). The antioxidant capacity of the extracts was determined with the Rancimat test using sunflower oil as substrate. Free radical scavenging activity was measured using the stable free radical 1, 1-diphenyl-2-picrylhydrazyl (DPPH)...
April 4, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28362473/the-effect-of-antioxidants-on-quantitative-changes-of-lysine-and-methionine-in-linoleic-acid-emulsions-at-different-ph-conditions
#5
Marzanna Hęś, Anna Gliszczyńska-Świgło, Anna Gramza-Michałowska
BACKGROUND: Plants are an important source of phenolic compounds. The antioxidant capacities of green tea, thyme and rosemary extracts that contain these compounds have been reported earlier. However, there is a lack of accessible information about their activity against lipid oxidation in emulsions and inhibit the interaction of lipid oxidation products with amino acids. Therefore, the influence of green tea, thyme and rosemary extracts and BHT (butylated hydroxytoluene) on quantitative changes in lysine and methionine in linoleic acid emulsions at a pH of isoelectric point and a pH lower than the isoelectric point of amino acids was investigated...
January 2017: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28297743/a-simple-headspace-gc-ms-method-for-the-quantitative-determination-of-the-release-of-the-antioxidants-butylated-hydroxyanisole-and-butylated-hydroxytoluene-from-chewing-gum
#6
Enrico Davoli, Antonio Bastone, Giancarlo Bianchi, Mario Salmona, Luisa Diomede
RATIONALE: Butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) are widely used to prevent oxidation and rancidity in foodstuffs, pharmaceutical preparations and cosmetic formulations. Although their safety has been thoroughly investigated, possible endocrine side-effects have been suggested. A useful method for the determination of BHA and BHT in foods is needed to estimate their daily intake through the diet. METHODS: We selected commercial chewing gum as a model of complex food matrix and developed a new method based on gas chromatography/mass spectrometry...
March 15, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28283452/fractionation-of-enzymatic-hydrolysis-lignin-by-sequential-extraction-for-enhancing-antioxidant-performance
#7
Liangliang An, Guanhua Wang, Hongyu Jia, Cuiyun Liu, Wenjie Sui, Chuanling Si
The heterogeneity of lignin chemical structure and molecular weight results in the lignin inhomogeneous properties which also covers the antioxidant performance. In order to evaluate the effects of lignin heterogeneity on its antioxidant activity, four lignin fractions from enzymatic hydrolysis lignin were classified by sequential organic solvent extraction and further evaluated by DPPH (1,1-Diphenyl-2-Picrylhydrazyl) free radical scavenging capacity and reducing power analysis. The characterization including FTIR, (1)H NMR and GPC showed that the fractionation process could effectively separate lignin fractions with distinctly different molecular weight and weaken the heterogeneity of unfractionated lignin...
June 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28273584/antioxidant-activity-of-pomegranate-peel-extract-on-lipid-and-protein-oxidation-in-beef-meatballs-during-frozen-storage
#8
Sebahattin Serhat Turgut, Fatma Işıkçı, Ayla Soyer
Antioxidant effect of pomegranate peel extract (PE) to retard lipid and protein oxidation in beef meatballs was investigated during frozen storage at -18±1°C. Concentrated and freeze dried aqueous extract of pomegranate peel was incorporated into freshly prepared meatball mix at 0.5% and 1.0% concentrations, and compared with 0.01% butylated hydroxytoluene (BHT) and control (without any antioxidant). In PE treated samples, particularly in high PE concentration, peroxide, malondialdehyde and carbonyl formation, loss of total protein solubility and sulfhydryl groups were significantly lower than control after 6months of storage...
March 2, 2017: Meat Science
https://www.readbyqxmd.com/read/28272837/the-effect-of-buckwheat-hull-extract-on-lipid-oxidation-in-frozen-stored-meat-products
#9
Marzanna Hęś, Artur Szwengiel, Krzysztof Dziedzic, Joanna Le Thanh-Blicharz, Dominik Kmiecik, Danuta Górecka
This study investigated the effect of antioxidants on lipid stability of frozen-stored meat products. Buckwheat hull extract was used to enrich fried meatballs made from ground pork. During 180-d storage of meat products, lipid oxidation (peroxide and 2-thiobarbituric acid reactive substances [TBARS] value) was periodically monitored. The results were compared with butylated hydroxytoluene (BHT). The addition of antioxidants decreased lipid oxidation in stored meatballs. The highest ability to control peroxide and TBARS values was demonstrated for buckwheat hull extract...
April 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28257057/purification-and-identification-of-antioxidant-peptides-from-protein-hydrolysate-of-scalloped-hammerhead-sphyrna-lewini-cartilage
#10
Xue-Rong Li, Chang-Feng Chi, Li Li, Bin Wang
The aim of this study was to purify and identify peptides with antioxidant properties from protein hydrolysate of scalloped hammerhead (Sphyrna lewini) cartilage. Cartilaginous proteins of the scalloped hammerhead were extracted by guanidine hydrochloride, and three antioxidant peptides, named enzymolysis peptide of scalloped hammerhead cartilage A (SCPE-A), SCPE-B and SCPE-C, were subsequently isolated from the hydrolysate of the cartilaginous proteins using ultrafiltration and chromatography. The amino acid sequences of SCPE-A, SCPE-B and SCPE-C were identified as Gly-Pro-Glu (GPE), Gly-Ala-Arg-Gly-Pro-Gln (GARGPQ), and Gly-Phe-Thr-Gly-Pro-Pro-Gly-Phe-Asn-Gly (GFTGPPGFNG), with molecular weights of 301...
March 1, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28216892/antioxidant-and-hepatoprotective-potential-of-phenol-rich-fraction-of-juniperus-communis-linn-leaves
#11
Akash Ved, Amresh Gupta, Ajay Kumar Singh Rawat
BACKGROUND: Juniperus communis Linn. is an important plant in India traditional system of medicine which is widely used by different tribes in many countries. OBJECTIVE: In the present study, the antioxidant, cytotoxic and hepatoprotective activities of Juniperus communis leaves were investigated against various models. MATERIALS AND METHODS: ethanolic extract (70% v/v) of J. communis leaves was successively extracted using hexane and ethyl acetate to prepare various fractions...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28211691/lipophilized-grape-seed-proanthocyanidin-derivatives-as-novel-antioxidants
#12
Mingshun Chen, Shujuan Yu
Grape seed proanthocyanidin (GSP) is a natural food antioxidant. Natural proanthocyanidins (PC) in grape seed are usually polyhydroxy derivatives which exhibit hydrophilic character. GSP was modified structurally to improve its lipophilicity, expand its application in lipophilic media, and enhance its cellular absorption in vivo. Esterification of the water-soluble GSP was prepared by immobilized lipase Lipozyme TL IM with lauric acid, and their enhanced lipophilicity was confirmed by the 1-octanol/water partition coefficient...
February 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28159281/comparative-study-of-the-antioxidant-activities-of-some-lipase-catalyzed-alkyl-dihydrocaffeates-synthesized-in-ionic-liquid
#13
COMPARATIVE STUDY
Somayeh Gholivand, Ola Lasekan, Chin Ping Tan, Faridah Abas, Leong Sze Wei
The solubility limitations of phenolic acids in many lipidic environments are now greatly improved by their enzymatic esterification in ionic liquids (ILs). Herein, four different ILs were tested for the esterification of dihydrocaffeic acid with hexanol and the best IL was selected for the synthesis of four other n-alkyl esters with different chain-lengths. The effect of alkyl chain length on the anti-oxidative properties of the resulted purified esters was investigated using β-carotene bleaching (BCB) and free radical scavenging method DPPH and compared with butylated hydroxytoluene (BHT) as reference compound...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28159244/preparation-of-steppogenin-and-ascorbic-acid-vitamin-e-butylated-hydroxytoluene-oil-in-water-microemulsions-characterization-stability-and-antibrowning-effects-for-fresh-apple-juice
#14
Jing Tao, Qin Zhu, Fang Qin, Mingfu Wang, Jie Chen, Zong-Ping Zheng
Oil-in-water microemulsions (O/W MEs) allow the preparation of insoluble compounds into liquid. In this study, we prepared O/W MEs to improve the solubility and stability of steppogenin (S) in aqueous liquid, and studied their ability to inhibit fresh apple juice browning. The ME technique greatly increased steppogenin solubility up to 3000-fold higher than that in water. All SMEs demonstrated good stability after acceleration and long-term storage. In particular, 0.01% SME was associated with dramatic inhibition of fresh apple juice browning after 24h at room temperature and 7days at 4°C, and its antibrowning effects were further improved when combined with 0...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28154487/evaluation-of-antioxidant-anti-cholinesterase-and-anti-inflammatory-effects-of-culinary-mushroom-pleurotus-pulmonarius
#15
Trung Kien Nguyen, Kyung Hoan Im, Jaehyuk Choi, Pyung Gyun Shin, Tae Soo Lee
Culinary mushroom Pleurotus pulmonarius has been popular in Asian countries. In this study, the anti-oxidant, cholinesterase, and inflammation inhibitory activities of methanol extract (ME) of fruiting bodies of P. pulmonarius were evaluted. The 1,1-diphenyl-2-picryl-hydrazy free radical scavenging activity of ME at 2.0 mg/mL was comparable to that of butylated hydroxytoluene, the standard reference. The ME exhibited significantly higher hydroxyl radical scavenging activity than butylated hydroxytoluene. ME showed slightly lower but moderate inhibitory activity against acetylcholinesterase (AChE) and butyrylcholinesterase than galantamine, a standard AChE inhibitor...
December 2016: Mycobiology
https://www.readbyqxmd.com/read/28133943/reversed-phase-single-drop-microextraction-followed-by-high-performance-liquid-chromatography-with-fluorescence-detection-for-the-quantification-of-synthetic-phenolic-antioxidants-in-edible-oil-samples
#16
Bahman Farajmand, Mahnaz Esteki, Elham Koohpour, Vahid Salmani
The reversed-phase mode of single drop microextraction has been used as a preparation method for the extraction of some phenolic antioxidants from edible oil samples. Butylated hydroxyl anisole, tert-butylhydroquinone and butylated hydroxytoluene were employed as target compounds for this study. High-performance liquid chromatography followed by fluorescence detection was applied for final determination of target compounds. The most interesting feature of this study is the application of a disposable insulin syringe with some modification for microextraction procedure that efficiently improved the volume and stability of the solvent microdrop...
January 30, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28105861/a-novel-benzimidazole-and-other-constituents-with-antiproliferative-and-antioxidant-properties-from-thymelaea-microphylla-coss-et-dur
#17
Labib Noman, Feyza Oke-Altuntas, Amar Zellagui, Ayse Sahin Yaglioglu, Ibrahim Demirtas, Susana M Cardoso, Salah Akkal, Noureddine Gherraf, Salah Rhouati
A new compound (microphybenzimidazole, 7) along with the six known compounds matairesinol (1), prestegane B (2), umbelliferone (3), daphnoretin (4), microphynolide A (5) and microphynolide B (6) were isolated from Thymelaea microphylla. The structures of the pure compounds were elucidated by spectroscopic and mass-spectrometric analyses, including 1D-, 2D-NMR, and HPLC-TOF/MS. Compounds 2 and 4, as well as three fractions (F6, F6-C5, and F6-W42) obtained from a 50% (v:v) CH2Cl2:MeOH extract exhibited a selective activity against rat brain glioma cells (C6)...
January 20, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28100884/stabilization-of-neem-oil-biodiesel-with-corn-silk-extract-during-long-term-storage
#18
Rehab Farouk M Ali, Ayman M El-Anany
The current study aimed to evaluate the antioxidant efficiency of different extracts of corn silk. In addition, the impact of corn silk extract on oxidative stability of neem biodiesel during storage was studied. The highest phenolics, DPPH radical scavenging and reducing power activities were recorded for methanol-water extract. The longest oxidation stability (10 h) was observed for biodiesel samples blended with 1000 ppm of corn silk extract (CSE). At the end of storage period the induction time of biodiesel samples mixed with 1000 ppm of CSE or butylated hydroxytoluene (BHT) were about 6...
February 1, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28067055/chemical-composition-and-antioxidant-activity-of-essential-oil-from-leaves-and-rhizomes-of-curcuma-angustifolia-roxb
#19
Sudipta Jena, Asit Ray, Anwesha Banerjee, Ambika Sahoo, Noohi Nasim, Suprava Sahoo, Basudeba Kar, Jeetendranath Patnaik, Pratap Chandra Panda, Sanghamitra Nayak
The essential oil extracted from rhizome and leaf of Curcuma angustifolia Roxb. (Zingiberaceae) was characterised by gas chromatography-mass spectrometry (GC-MS). The GC-MS analysis revealed the presence of 32 and 35 identified constituents, comprising 92.6% and 92% of total leaf and rhizome oil, respectively. Curzerenone (33.2%), 14-hydroxy-δ-cadinene (18.6%) and γ-eudesmol acetate (7.3%) were the main components in leaf oil. In rhizome oil, curzerenone (72.6%), camphor (3.3%) and germacrone (3.3%) were found to be the major constituents...
January 9, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28052192/fish-in-vitro-digestion-influence-of-fish-salting-on-the-extent-of-lipolysis-oxidation-and-other-reactions
#20
Bárbara Nieva-Echevarría, Encarnación Goicoechea, María J Manzanos, María D Guillén
A study of the various chemical reactions which take place during fish in vitro digestion and the potential effect of fish salting on their extent is addressed for the first time. Farmed European sea bass fillets, raw, brine-salted or dry-salted, were digested using a gastrointestinal in vitro model. Fish lipid extracts before and after digestion were analyzed by (1)H NMR, and the headspace composition of the digestates was investigated by SPME-GC/MS. During digestion, not only lipolysis, but also fish lipid oxidation took place...
February 1, 2017: Journal of Agricultural and Food Chemistry
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