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Showing 1-30 of 126 results for "273031" within Papers
Evelyn B Rodriguez et al.
Journal of food science, 74(9), C674-C682 (2010-05-25)
To gain a better understanding of the reactions and the underlying mechanisms of the oxidative degradation of lycopene, the products formed by epoxidation with m-chloroperbenzoic acid (MCPBA), oxidative cleavage with KMnO(4), and autoxidation in low-moisture and aqueous model systems, under
Maurus Biedermann et al.
Journal of chromatography. A, 1624, 461236-461236 (2020-06-17)
On-line coupled high performance liquid chromatography-gas chromatography-flame ionization detection (HPLC-GC-FID) used for determining mineral oil aromatic hydrocarbons (MOAH) in foods, particularly in certain oils and fats, may be disturbed by interfering olefins present as natural food components or resulting from
Shin Kamijo et al.
Organic letters, 12(18), 4195-4197 (2010-08-26)
The direct oxidation of ether sp(3) C-H bonds using the new reagent system mCPBA/CCl(3)CN/MeCN has been developed. CCl(3)CN in MeCN drastically alters the reactivity of m-chloroperbenzoic acid (mCPBA), and chemoselective transformation of methyl ethers to ketones was realized under mild
Anja Fux et al.
Cell chemical biology, 26(1), 48-59 (2018-11-13)
Detection of dynamic protein-protein interactions within complexes and networks remains a challenging task. Here, we show by the example of the proteolytic ClpXP complex the utility of combined chemical cross-linking and mass spectrometry (XL-MS) to map interactions within ClpP and
Xiaoyao Wei et al.
ChemistryOpen, 8(8), 1076-1083 (2019-08-14)
P450 119 peroxygenase was found to catalyze the sulfoxidation of thioanisole and the sulfonation of sulfoxide in the presence of tert-butyl hydroperoxide (TBHP) for the first time with turnover rates of 1549 min-1 and 196 min-1 respectively. Several mutants were designed to
Ana Luísa Almeida Lage et al.
Chemosphere, 268, 129334-129334 (2020-12-29)
Synthetic manganese porphyrins (MnPs), in the presence of oxidants, were employed for the degradation of fluoroquinolone antibiotics. Ciprofloxacin (CIP) and levofloxacin (LEV) degradation by iodosylbenzene, iodobenzene diacetate, H2O2 and meta-chloroperbenzoic acid using water-soluble MnP catalysts yielded thirteen and nine products
Mostafa Isbera et al.
Molecules (Basel, Switzerland), 25(10) (2020-05-28)
Organophosphorus compounds occupy a significant position among the plethora of organic compounds, but a limited number of paramagnetic phosphorus compounds have been reported, including paramagnetic phosphonates. This paper describes the syntheses and further transformations of pyrroline and piperidine nitroxide phosphonates
Jean-Baptiste Aholia Adépo et al.
Drug and chemical toxicology, 42(3), 243-251 (2018-01-18)
The toxicity of aflatoxins results in cancer and liver disease. Several natural substances such as plants exhibited their ability to inhibit the initiation of aflatoxin carcinogenesis. The aim of this study was to evaluate the effect of Alchornea cordifolia on
Savita K Sharma et al.
Journal of the American Chemical Society, 139(48), 17421-17430 (2017-11-02)
Peroxynitrite (
Elizabeth L Onderko et al.
Nature chemistry, 9(7), 623-628 (2017-06-24)
Strong electron-donation from the axial thiolate ligand of cytochrome P450 has been proposed to increase the reactivity of compound I with respect to C-H bond activation. However, it has proven difficult to test this hypothesis, and a direct link between
Muthupandian Ganesan et al.
Analytical methods : advancing methods and applications, 12(35), 4254-4275 (2020-09-18)
Great advances have been made in sensor-based methods for chemical analysis owing to their high sensitivity, selectivity, less testing time, and minimal usage of chemical reagents. Quantum Dots (QDs) having excellent optical properties have been thoroughly explored for variety of
Tianyu He et al.
Analytical chemistry, 90(21), 12802-12809 (2018-09-18)
Several plants of agricultural and medicinal importance utilize defense chemistry that involves deployment of highly labile, reactive, and lachrymatory organosulfur molecules. However, this chemistry is difficult to investigate because the compounds are often short-lived and prone to degradation under the
Nicolas Kratena et al.
Steroids, 164, 108716-108716 (2020-08-30)
We herein report the synthesis of the long-term metabolites "M4" (IUPAC: 4-chloro-17-hydroxymethyl-17-methyl-18-norandrosta-4,13-dien-3-ol) of dehydrochloromethyl-testosterone (DHCMT, Oral Turinabol) and "Oxy M9" (4-hydroxy-17β-hydroxymethyl-17α-methyl-18-norandrosta-4,13-dien-3-one) of oxymesterone (Oranabol). Both compounds were derived from a common synthetic route starting from dehydroepiandrosterone acetate. Four different stereoisomers
Bapurao Surnar et al.
Nanoscale, 7(42), 17964-17979 (2015-10-16)
Platinum drug delivery against the detoxification of cytoplasmic thiols is urgently required for achieving efficacy in breast cancer treatment that is over expressed by glutathione (GSH, thiol-oligopeptide). GSH-resistant polymer-cisplatin core-shell nanoparticles were custom designed based on biodegradable carboxylic functional polycaprolactone
Xiuhong Wu et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 989, 98-103 (2015-03-31)
We investigated the metabolic fate of gentianine after oral administration to Wistar rats for the first time. Liquid chromatography/ion trap mass spectrometry detected four metabolites secogentianoxide, gentiandiol, gentianepoxide and gentianoxide in rat plasma together with the original compound gentianine. The
Ana Luísa Almeida Lage et al.
Journal of hazardous materials, 360, 445-451 (2018-08-25)
A range of hydrophobic first-, second-, and third-generation manganese porphyrins (MnPs) was investigated as cytochrome P450 models for degradation of the antibiotic ciprofloxacin (CIP). The experiments were carried out under mild conditions; oxidants such as iodosylbenzene (PhIO), H2O2, and meta-chloroperbenzoic
Ana M Jiménez-Carvelo et al.
Talanta, 195, 69-76 (2019-01-11)
Second-order data acquired using liquid chromatography coupled to a diode array detector were used to classify extra virgin olive oils samples according to their cultivars. The chromatographic fingerprints from the epoxidised fraction were obtained using normal-phase liquid chromatography. To reduce
Alexandre Baralle et al.
Macromolecular rapid communications, 41(6), e1900644-e1900644 (2020-02-06)
In a significant breakthrough from classical molecular (i.e., nonpolymeric) iodonium salts in light-induced photochemistry, the synthesis and use of new safer polymeric iodonium salts are reported here. They are shown to be involved in charge transfer complexes (CTCs) while in
Stefan Oelmann et al.
Biomacromolecules, 20(1), 90-101 (2018-06-06)
A Passerini three-component polymerization was performed for the synthesis of amphiphilic star-shaped block copolymers with hydrophobic cores and hydrophilic coronae. The degree of polymerization of the hydrophobic core was varied from 5 to 10 repeating units, and the side chain
Gurmit Singh et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 28(6), 731-739 (2011-05-31)
Malachite green (MG), a member of the N-methylated triphenylmethane class of dyes, has long been used to control fungal and protozoan infections in fish. MG is easily absorbed by fish during waterborne exposure and is rapidly metabolized into leucomalachite green
Evgeny V Kudrik et al.
Nature chemistry, 4(12), 1024-1029 (2012-11-24)
High-valent oxo-metal complexes are involved in key biochemical processes of selective oxidation and removal of xenobiotics. The catalytic properties of cytochrome P-450 and soluble methane monooxygenase enzymes are associated with oxo species on mononuclear iron haem and diiron non-haem platforms
Which oxidant is really responsible for P450 model oxygenation reactions? A kinetic approach.
Alicja Franke et al.
Angewandte Chemie (International ed. in English), 47(28), 5238-5242 (2008-06-04)
Xiaoyan Tang et al.
Nature communications, 9(1), 2345-2345 (2018-06-13)
Bacterial poly(3-hydroxybutyrate) (P3HB) is a perfectly isotactic, crystalline material possessing properties suitable for substituting petroleum plastics, but high costs and low volumes of its production are impractical for commodity applications. The chemical synthesis of P3HB via ring-opening polymerization (ROP) of
Yvan Ecochard et al.
Molecules (Basel, Switzerland), 24(9) (2019-05-15)
Epoxy materials have attracted attention for many applications that require fireproof performance; however, the utilization of hazardous reagents brings about potential damage to human health. Eugenol and cardanol are renewable, harmless resources (according to ECHA) that allow the achievement of
Sagarika Bhattacharya et al.
ACS nano, 13(2), 1433-1442 (2019-01-08)
Multicolor, fluorescent self-healing gels were constructed through reacting carbon dots produced from different aldehyde precursors with branched polyethylenimine. The self-healing gels were formed through Schiff base reaction between the aldehyde units displayed upon the carbon dots' surface and primary amine
Alicja Franke et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 15(39), 10182-10198 (2009-08-29)
The present study focuses on the oxidation of the water-soluble and water-insoluble iron(III)-porphyrin complexes [Fe(III)(TMPS)] and [Fe(III)(TMP)] (TMPS = meso-tetrakis(2,4,6-trimethyl-3-sulfonatophenyl)porphyrinato, TMP = meso-tetrakis(2,4,6-trimethylphenyl)porphyrinato), respectively, by meta-chloroperoxybenzoic acid (m-CPBA) in aqueous methanol and aqueous acetonitrile solutions of varying acidity. With the
Ming-Liang Chen et al.
Nanoscale research letters, 6(1), 398-398 (2011-06-30)
Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material. The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy
Yihong Jia et al.
Materials (Basel, Switzerland), 13(21) (2020-11-04)
A series of oligomeric (salen)Mn(III) complexes featuring tartrate linkers were prepared and immobilized over layered double hydroxide, and then used as catalysts for asymmetric epoxidation of unfunctionalized olefins. Comprehensive characterizations including 1H NMR, FT-IR, UV-Vis, elemental analysis, GPC, and ICP-AES
Lingling Liu et al.
Food chemistry, 333, 127488-127488 (2020-07-19)
A mild mixed-solvent of n-hexane/isopropanol is proposed for extracting total mineral oil hydrocarbons (MOH) from commercial milk powder products. Unlike acid-hydrolysis, the mixed-solvent extraction was performed at ambient temperature and the low-boiling-point hydrocarbons were retained to the greatest extent. After
Chiral Mn (III) salen complexes covalently bonded on modified MCM-41 and SBA-15 as efficient catalysts for enantioselective epoxidation of nonfunctionalized alkenes.
Kureshy R
J. Catal., 238(1), 134-141 (2006)
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