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Huansong Wang et al.
Free radical research, 41(4), 479-488 (2007-04-25)
Soy sauce is a traditional fermented seasoning in Asian countries, that has high antioxidant activity in vitro and some antioxidant activity in vivo. We attempted to identify the major antioxidants present, using the 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assay as a guide.
Katherine H Thompson et al.
Chemical Society reviews, 35(6), 545-556 (2006-05-27)
The family of hydroxypyrones and close congeners, the hydroxypyridinones, is a particularly versatile class of ligands. The most widely investigated for medicinal applications are the 3-hydroxy-4-pyrones and the 1,2- 3,2- and 3,4-hydroxypyridinones. Key features of these ligands are: a six-membered
Yuzhao Zhou et al.
Journal of inorganic biochemistry, 102(4), 798-808 (2008-01-22)
The objectives were to test the null hypotheses that (1) citrate, maltolate, and fluoride do not significantly influence oral Al bioavailability, C(max) or T(max) at an Al dose relevant to drinking water exposure; and (2) Al citrate and maltolate are
Wojciech Dabros et al.
Folia histochemica et cytobiologica, 45(3), 239-244 (2007-10-24)
The biochemical activity and morphology of control and streptozotocin-diabetic rat liver Golgi complexes were previously investigated by us under influence of some vanadium [V(IV)] compounds. The effectiveness of these derivatives depends on the kind of complexing ligands. This paper presents
Wolfgang Kandioller et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 15(45), 12283-12291 (2009-10-13)
Organometallic ruthenium-arene compounds bearing a maltol ligand have been shown to be nearly inactive in in vitro anticancer assays, presumably due to the formation of dimeric Ru(II) species in aqueous solutions. In an attempt to stabilize such complexes, [Ru(eta(6)-p-cymene)(XY)Cl] (XY=pyrones
Stefano Amatori et al.
The Journal of organic chemistry, 77(5), 2207-2218 (2012-02-03)
The N,N'-bis[(3-hydroxy-4-pyron-2-yl)methyl]-N,N'-dimethylethylendiamine (malten) and 4,10-bis[(3-hydroxy-4-pyron-2-yl)methyl]-1,7-dimethyl-1,4,7,10-tetraazacyclododecane (maltonis) were synthesized and characterized. The acid-base behavior, structural characterizations, and biochemical studies in aqueous solution were reported. Each compound contains two 3-hydroxy-2-methyl-4-pyrone units (maltol) symmetrically spaced by a polyamine fragment, the 1,4-dimethylethylendiamine (malten), or
Inthawoot Suppavorasatit et al.
Journal of agricultural and food chemistry, 60(32), 7817-7823 (2012-07-27)
The effect of the enzymatic deamidation by protein-glutaminase (PG) on flavor-binding properties of soy protein isolate (SPI) under aqueous conditions was evaluated by a modified equilibrium dialysis (ultrafiltration) technique. Binding parameters, such as number of binding sites (n) and binding
Archika Barve et al.
Inorganic chemistry, 48(19), 9120-9132 (2009-09-29)
The mixed-ligand complexes [Cu(L)(maltol)] where L = 2,2'-bipyridine (bpy; 1), 1,10-phenanthroline (phen; 2), 1,10-phenanthroline-5,6-dione (phendione; 3), dipyrido[3,2-a:2',3'-c]phenazine (dppz; 4), and 4b,5,7,7a-tetrahydro-4b,7a-epiminomethanoimino-6H-imidazo[4,5-f][1,10]-phenanthroline-6,13-dione (bipyridylglycoluril; bpg; 5) have been synthesized and characterized by structural, analytical, and spectral methods. The single-crystal X-ray structures of
Sílvia Chaves et al.
Journal of inorganic biochemistry, 114, 38-46 (2012-06-13)
The O,S-donor analogues of maltol and deferiprone (DMHP), respectively, thiomaltol and DMHTP, have been investigated in solution for their iron-complexation ability, as well as their electrochemical behaviors, in the presence and absence of iron, aimed at the rationalization of their
Christoph J Jocher et al.
Inorganic chemistry, 47(18), 7951-7953 (2008-08-19)
The synthesis, characterization, and photophysical properties are reported for several Ln(III) complexes of a tetradentate chelate, 5LIO-MAM, derived from the common flavor enhancer "maltol". Eu(III), Yb(III), and Nd(III) form stable ML2 complexes in aqueous solution that emit in the red
Éva A Enyedy et al.
Journal of inorganic biochemistry, 117, 189-197 (2012-10-24)
The stoichiometry and stability constants of the Ga(III) complexes of 8-hydroxyquinoline (HQ), 8-hydroxyquinoline-5-sulfonate (HQS), maltol, thiomaltol, allomaltol and thioallomaltol were determined by means of pH-potentiometry, UV-vis spectrophotometry, spectrofluorometry and (1)H NMR spectroscopy in aqueous solution. Spectrofluorometry was used to determine
Ki Sung Kang et al.
The Journal of pharmacy and pharmacology, 60(4), 445-452 (2008-04-03)
Inhibitors of advanced glycation end products (AGEs) have potential as preventive agents against diabetic complications. In-vitro AGE inhibitory activity, transition metal chelating, and free radical scavenging activity tests have been used to screen for and identify effective AGE inhibitors. In
Xiao-Jie Mi et al.
Journal of agricultural and food chemistry, 67(5), 1392-1401 (2019-01-16)
Our previous study has confirmed that maltol can attenuate alcohol-induced acute hepatic damage and prevent oxidative stress in mice. Therefore, maltol might have the capacity to improve thioacetamide (TAA)-induced liver fibrosis. The purpose of this work was to explore the
Mei-Lin Yang et al.
Journal of natural products, 74(9), 1996-2000 (2011-08-19)
In order to explore the anti-inflammatory principles of the mycelia of Cordyceps sinensis, the crude extract and partially purified fractions were examined for their inhibition of superoxide anion generation and elastase release. Further chemical investigation of the bioactive fractions has
Christine M Mayr et al.
Journal of agricultural and food chemistry, 63(13), 3394-3401 (2015-03-31)
A quantitation method for 18 aroma compounds reported to contribute to "oxidative" flavor in wines was developed. The method allows quantitation of the (E)-2-alkenals ((E)-2-hexenal, (E)-2-heptenal, (E)-2-octenal, and (E)-2-nonenal), various Strecker aldehydes (methional, 2-phenylacetaldehyde, 3-methylbutanal, and 2-methylpropanal), aldehydes (furfural, 5-methylfurfural
Lee Fang Chin et al.
Journal of inorganic biochemistry, 105(3), 339-347 (2011-03-23)
The synthesis and characterization of two cobalt(II) complexes, Co(phen)(ma)Cl 1 and Co(ma)(2)(phen) 2, (phen=1,10-phenanthroline, ma(-)=maltolate or 2-methyl-4-oxo-4H-pyran-3-olate) are reported herein. The complexes have been characterized by FTIR, CHN analysis, fluorescence spectroscopy, UV-visible spectroscopy, conductivity measurement and X-ray crystallography. The number
S Amatori et al.
British journal of cancer, 103(2), 239-248 (2010-06-24)
Hydroxypyrones represent several classes of molecules known for their high synthetic versatility. This family of molecules shows several interesting pharmaceutical activities and is considered as a promising source of new antineoplastic compounds. In the quest to identify new potential anticancer
Sameena Mehtab et al.
Journal of inorganic biochemistry, 121, 187-195 (2013-02-16)
The interaction of V(IV)O-salts as well as of a few V(IV)O(carrier)n complexes with human serum transferrin (hTF) is studied focusing on the determination of the nature and stoichiometry of the binding of V(IV)O(2+) to hTF, as well as whether the
Anwar Anwar-Mohamed et al.
Toxicology in vitro : an international journal published in association with BIBRA, 21(4), 685-690 (2007-02-24)
Maltol is used extensively as a flavor-enhancing agent, food preservative, antioxidant, and also in cosmetic and pharmaceutical formulations. However, a number of studies have shown that maltol may induce carcinogenicity and toxicity but the mechanisms involved remain unknown. Therefore, we
Ana González Baró et al.
Dalton transactions (Cambridge, England : 2003), (8)(8), 1095-1102 (2008-02-16)
The speciation in the aqueous H(+)/H(2)VO(4)(-)/H(2)O(2)/maltol (Ma), H(+)/H(2)VO(4)(-)/uridine (Ur) and H(+)/H(2)VO(4)(-)/H(2)O(2)/Ur systems was determined in the physiological medium of 0.150 M Na(Cl) at 25 degrees C. A combination of quantitative (51)V NMR (Bruker AMX500) and potentiometric data (glass electrode) was
Malin Backlund et al.
Inorganic chemistry, 47(7), 2864-2870 (2008-02-09)
Thione-substituted derivatives of maltol are of interest in several applications of metal-based drugs. In order to investigate the effect of the oxygenation on such thione chelates, Ru complexes of 3-hydroxy-2-methyl-4-thiopyrone (thiomaltol or Htma) and 3-hydroxy-2-methyl-4H-thiopyran-4-thione (dithiomaltol or Httma), [Ru(bpy)2(tma)](+), 1
Yunzi Feng et al.
Food chemistry, 187, 44-52 (2015-05-16)
Aroma extract dilution analysis (AEDA) is widely used for the screening of aroma-active compounds in gas chromatography-olfactometry (GC-O). In this study, three aroma dilution methods, (I) using different test sample volumes, (II) diluting samples, and (III) adjusting the GC injector
Cristiana M L Di Giuro et al.
Journal of inorganic biochemistry, 105(9), 1204-1211 (2011-07-02)
Mononuclear nonheme iron enzymes (MNHEs) catalyze a range of very diverse reactions in O(2) metabolism, but they share a common principle active-site organization. To investigate a putative catalytic promiscuity of these enzymatic metal centers, we studied the reactivity of the
Tamás Jakusch et al.
Dalton transactions (Cambridge, England : 2003), (13)(13), 2428-2437 (2009-03-18)
The interactions of various insulin mimetic oxovanadium(IV) compounds with serum proteins were studied in model systems and in ex vivo samples. For the modeling study, an earlier in situ method was extended and applied to the formation of ternary complexes
Martin Preininger et al.
Journal of agricultural and food chemistry, 57(21), 9902-9908 (2009-10-13)
Dihydromaltol (DHM; 2,3-dihydro-5-hydroxy-6-methyl-4H-pyran-4-one) was identified as a novel potent aroma compound in a dairy product, Ryazhenka kefir, using GC-olfactometry-MS. The flavor impact of the structurally related caramelized-smelling compounds DHM, 2,5-dimethyl-4-hydroxy-3(2H)-furanone (DMHF), 5-ethyl-4-hydroxy-2-methyl-3(2H)-furanone (EHMF) and maltol was assessed in various dairy
K S Kang et al.
Journal of medicinal food, 12(1), 124-130 (2009-03-21)
To ascertain the principal active peroxynitrite (ONOO(-)) scavenging components of heat-processed Panax ginseng C.A. Meyer (sun ginseng [SG]), the ONOO(-) scavenging activities of fractions and components of SG were compared. The results demonstrated that the ONOO(-) scavenging ability of SG
Ki Young Shin et al.
Journal of neuroscience research, 85(11), 2500-2511 (2007-06-30)
To develop a novel and effective drug that could enhance cognitive function and neuroprotection, we newly synthesized maltolyl p-coumarate by the esterification of maltol and p-coumaric acid. In the present study, we investigated whether maltolyl p-coumarate could improve cognitive decline
Sang-Jun Lee et al.
Journal of food science, 75(2), C147-C151 (2010-05-25)
The explosive puffing process may provide characteristic physicochemical properties in red ginseng. The effects of explosive puffing on the changes of volatiles in red ginseng were investigated using headspace-solid phase microextraction (HS-SPME)-gas chromatograph (GC) with a mass selective detector (MS).
Tomochika Ishiyama et al.
Organic letters, 15(17), 4488-4491 (2013-08-14)
The multiply oxygenated ABC-ring system of the dihydro-β-agarofurans was synthesized by employing two highly stereoselective reactions. The quinidine-catalyzed Diels-Alder reaction between a chiral dienophile and 3-hydroxy-4-methyl-2-pyrone simultaneously installed the C2-stereogenic center and two contiguous tetrasubstituted carbon centers (C5 and C10)
Jennifer A Jacobsen et al.
Journal of medicinal chemistry, 54(2), 591-602 (2010-12-30)
Fragment-based lead design (FBLD) has been used to identify new metal-binding groups for metalloenzyme inhibitors. When screened at 1 mM, a chelator fragment library (CFL-1.1) of 96 compounds produced hit rates ranging from 29% to 43% for five matrix metalloproteases
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