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En Han et al.
Analytical biochemistry, 486, 102-106 (2015-07-15)
A sensitive and simple amperometric biosensor for phenols was developed based on the immobilization of tyrosinase into CdS quantum dots/chitosan nanocomposite matrix. The nanocomposite film with porous nanostructure, excellent hydrophilicity and biocompatibility resulted in high enzyme loading, and the tyrosinase
Cuicui Sha et al.
Journal of separation science, 38(13), 2357-2362 (2015-04-22)
We developed a method for the direct identification of dopamine in single cultured rat pheochromocytoma cells by capillary electrophoresis using an end-channel carbon fiber nanoelectrode amperometric detector. The operation mode was designed to achieve single-cell injection and lysis in microfluidic
Jee-Heon Jeong et al.
Biochemical and biophysical research communications, 433(4), 513-518 (2013-03-26)
To investigate the inhibition effects of pancreatic islet transplantation on the progression of obese type 2 diabetes, we analyzed the effects of surface camouflaged islet transplantation on delaying the disease progression in a db/db diabetic mouse model. Surface camouflaged islets
Catechol-functionalized adhesive nanoparticles as a surface-releasing system.
Kinam Park
Journal of controlled release : official journal of the Controlled Release Society, 170(2), 306-306 (2013-07-17)
Y-A Bae et al.
Parasitology, 142(6), 807-815 (2015-01-27)
Trematode tyrosinases (TYRs) play a major role in the tanning process during eggshell formation. We investigated the molecular and biochemical features of Paragonimus westermani TYR (PwTYR). The PwTYR cDNA was composed of 1568-bp encompassing a 1422-bp-long open reading frame (474-amino
E Roemer et al.
Regulatory toxicology and pharmacology : RTP, 70 Suppl 1, S2-14 (2014-12-17)
This publication introduces a series of six other publications describing the toxicological assessment of kretek cigarettes, i.e., cigarettes characterized primarily by the use of a significant amount of cloves as an ingredient added to the tobacco. This paper presents background
Nanting Ni et al.
Bioorganic & medicinal chemistry letters, 18(5), 1567-1572 (2008-02-12)
Bacteria can coordinate community-wide behaviors through quorum sensing, that is, the secretion and sensing of autoinducer (AI) molecules. Bacterial quorum sensing is implicated in the regulation of pathologically relevant events such as biofilm formation, bacterial virulence, and drug resistance. Inhibitors
S G Carmella et al.
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 20(5), 587-590 (1982-10-01)
A method was developed for the quantitative analysis of catechol and 4-methylcatechol in human urine. [U-14C]Catechol was used as in internal standard. Urine was treated with beta-glucuronidase and sulphatase, acidified and extracted with ether. The ether extract was silylated and
Lorenzo Pesci et al.
The FEBS journal, 282(7), 1334-1345 (2015-02-06)
Microbial decarboxylases, which catalyse the reversible regioselective ortho-carboxylation of phenolic derivatives in anaerobic detoxification pathways, have been studied for their reverse carboxylation activities on electron-rich aromatic substrates. Ortho-hydroxybenzoic acids are important building blocks in the chemical and pharmaceutical industries and
E L Cavalieri et al.
Cellular and molecular life sciences : CMLS, 59(4), 665-681 (2002-05-23)
Exposure to estrogens is a risk factor for breast and other human cancers. Initiation of breast, prostate and other cancers has been hypothesized to result from reaction of specific estrogen metabolites, catechol estrogen-3,4-quinones, with DNA to form depurinating adducts at
M V Relling et al.
Molecular pharmacology, 45(2), 352-358 (1994-02-01)
We previously demonstrated that O-demethylation of the pendant dimethoxyphenol ring of epipodophyllotoxins to produce their respective catechol metabolites is catalyzed by cytochrome(s) P450 in human liver microsomes. Our objective was to identify the specific human cytochrome(s) P450 responsible for catechol
Yuhui Cheng et al.
Fish & shellfish immunology, 47(1), 117-121 (2015-09-01)
Three proteins with PO-like activities in the coelomocytes of sea urchin Strongylocentrotus nudus were identified using electrophoretic method and named as SnPO1, SnPO2 and SnPO3 according to their molecular mass from high to low. The SnPOs were characterized for substrate
Thierry Franck et al.
Chemico-biological interactions, 206(2), 194-203 (2013-09-26)
We investigated the antioxidant activities of some phenolic acid derivatives on a cell free system and on cellular and enzymatic models involved in inflammation. The stoichiometric antioxidant activities of phenolic acid derivatives were studied by measuring their capacity to scavenge
Myung-Hyun Ryou et al.
Advanced materials (Deerfield Beach, Fla.), 25(11), 1571-1576 (2013-01-03)
Conjugation of mussel-inspired catechol groups to various polymer backbones results in materials suitable as silicon anode binders. The unique wetness-resistant adhesion provided by the catechol groups allows the silicon nanoparticle electrodes to maintain their structure throughout the repeated volume expansion
Stefan Konieczny et al.
Chembiochem : a European journal of chemical biology, 16(1), 83-90 (2014-11-26)
Conjugates of enzymes and poly(2-methyloxazoline) were used as organosoluble amphiphilic polymer nanocontainers for dissolving osmate, thereby converting the enzymes into organosoluble artificial metalloenzymes. These were shown to catalyze the dihydroxylation of different alkenes with high enantioselectivity. The highest selectivities, found
Su Duy Nguyen et al.
Free radical research, 38(9), 969-976 (2004-12-29)
Paraoxonasel (PON1), one of HDL-asssociated antioxidant proteins, is known to be sensitive to oxidative stress. Here, the effect of endogenous reducing compounds on Cu(2+)-mediated inactivation of PON1 was examined. Cu(2+)-mediated inactivation of PON1 was enhanced remarkably by catecholamines, but not
Mei-Chi Chang et al.
PloS one, 9(7), e101959-e101959 (2014-07-23)
Chewing of betel quid (BQ) increases the risk of oral cancer and oral submucous fibrosis (OSF), possibly by BQ-induced toxicity and induction of inflammatory response in oral mucosa. Primary gingival keratinocytes (GK cells) were exposed to areca nut (AN) components
Mahboobeh Sharifi et al.
Insect science, 22(5), 639-650 (2014-07-06)
Insecticidal effects of 4-hexylresorcinol, a phenoloxidase (PO) inhibitor, were determined on Hyphantria cunea (Drury) under laboratory conditions. The LC50 for the 15-d-old larvae was estimated to be 2.95 g/L after 96 h exposure. The activities of glutathione S-transferase (GST) and
Fate of microbial metabolites of dietary polyphenols in rats: is the brain their target destination?
Mattia Gasperotti et al.
ACS chemical neuroscience, 6(8), 1341-1352 (2015-04-22)
Different polyphenol compounds are ingested when consuming a serving of fruits rich in polyphenols, spanning from one-phenol hydroxybenzoic acid to more complex polymeric compounds. Only a minor quantity of the polyphenols (5-10%) is absorbed. The remainder reaches the colon and
R D Irons
Journal of toxicology and environmental health, 16(5), 673-678 (1985-01-01)
Occupational exposure to benzene has long been associated with toxicity to the blood and bone marrow, including lymphocytopenia, pancytopenia, aplastic anemia, acute myelogenous leukemia, and possibly lymphoma. A variety of studies have established that benzene itself is not the toxic
Yuta Saito et al.
Macromolecular rapid communications, 34(8), 630-634 (2013-03-20)
Porous surface patterns are used in a wide variety of practical applications. Honeycomb-patterned porous polymer films are good templates for preparing porous surfaces due to their simple fabrication and the arrangement of pores on the surface. Catechol groups include in
Rohini Karandikar et al.
Applied biochemistry and biotechnology, 177(2), 318-333 (2015-07-24)
The first step involved in the degradation of phthalate isomers (phthalate, isophthalate and terephthalate) is the double hydroxylation by respective aromatic-ring hydroxylating dioxygenases. These are two component enzymes consisting of 'oxygenase' and 'reductase' components. Soil isolate Pseudomonas aeruginosa strain PP4
Shengnan Shi et al.
Bioresource technology, 193, 281-287 (2015-07-06)
Arthrobacter sp. W1 was used to characterize the pathways involved in cometabolic degradation of carbazole (CA) with phenol as the primary substrate. To clarify the upper pathway of cometabolic degradation CA, Escherichia coli strain BL21 expressing phenol hydroxylase from strain
Hélène Marie et al.
PloS one, 7(11), e50326-e50326 (2012-12-12)
This study deals with the anchorage of polyelectrolyte films onto titanium surfaces via a cathecol-based linker for biomedical applications. The following study uses a molecule functionalized with a catechol and a carboxylic acid: 3-(3,4-dihydroxyphenyl)propanoic acid. This molecule is anchored to
Delgerbat Boldbaatar et al.
Journal of ethnopharmacology, 155(1), 599-606 (2014-06-15)
Leptopyrum fumarioides has been used in the traditional medicine of Mongolia for the treatment of various diseases, including drug intoxications. However, since there is only sparse information about its chemistry, active components, and pharmacological and toxicological effects, the major aim
Ruth A Livingstone et al.
The Journal of chemical physics, 137(18), 184304-184304 (2012-11-21)
Time-resolved photoelectron imaging was used to investigate the dynamical evolution of the initially prepared S(1) (ππ*) excited state of phenol (hydroxybenzene), catechol (1,2-dihydroxybenzene), resorcinol (1,3-dihydroxybenzene), and hydroquinone (1,4-dihydroxybenzene) following excitation at 267 nm. Our analysis was supported by ab initio
Daniel P Poole et al.
American journal of physiology. Gastrointestinal and liver physiology, 309(4), G248-G259 (2015-07-04)
Activated G protein-coupled receptors traffic to endosomes and are sorted to recycling or degradative pathways. Endosomes are also a site of receptor signaling of sustained and pathophysiologically important processes, including inflammation. However, the mechanisms of endosomal sorting of receptors and
Hakki Mevlut Ozcan et al.
Artificial cells, nanomedicine, and biotechnology, 42(4), 256-261 (2013-02-01)
In this study, a novel fresh broad (Vicia faba) tissue homogenate-based biosensor for determination of phenolic compounds was developed. The biosensor was constructed by immobilizing tissue homogenate of fresh broad (Vicia faba) on to glassy carbon electrode. For the stability
Anna Proschak et al.
Chembiochem : a European journal of chemical biology, 14(5), 633-638 (2013-03-05)
Novel chatechol/hydroxamate siderophores (named "fimsbactins") were identified in Acinetobacter baumannii ATCC 17978 and Acinetobacter baylyi ADP1. The major compound, fimsbactin A, was isolated from low-iron cultures of A. baylyi ADP1, and its chemical structure was elucidated by mass spectrometry, and
Massimo Moretti et al.
Toxicology letters, 157(2), 119-128 (2005-04-20)
In the present study, we investigated in vitro the possible genotoxic and/or co-genotoxic activity of 50 Hz (power frequency) magnetic fields (MF) by using the alkaline single-cell microgel-electrophoresis (comet) assay. Sets of experiments were performed to evaluate the possible interaction
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