In this paper, for the first time, we show in chloraminated systems, the chloramine decaying proteins (CDP) play an important role in bulk water and biomass (biofilm) in resisting disinfectant. Extracellular polymeric substances in biofilm/biomass are known to protect microbes from disinfectants...
In a medium containing tryptophan, Ceratocystis fagacearum synthesized an auxin characterized as indole-3-acetic acid (IAA) by chromatography, bioassay, mass spectrometry and chemical derivatization. This synthesis paralleled fungal growth during 15 days in still culture, about 0·3% of the avai...
To understand the contradictory results on the structure of the lipopolysaccharide isolated from a Yersinia enterocolitica O:3, both anomers of methyl 2-acetamido-2,6-dideoxy-d-xylo-hexopyranosid-4-ulose were prepared. The key steps of the synthetic pathway were the selective acetylation of the ...
Diazabicyclo[5.4.0]undecene (DBU) reacts with carbon dioxide and N-subsititued-2-chloroacetoamides in a very simple one-step procedure, to give the corresponding 3-substituted oxazolidin-2,4-diones in excellent yields.
An analytical methodology including pressurized liquid extraction (PLE) as sample treatment to isolate retinyl acetate and tocopherols from infant formulas has been developed. The milk extracts were kept at −18 °C for 30 min and after filtration could be injected directly into the chromatograph...
Enzymatic cleavage of the nonsymmetric provitamin A carotenoid α-carotene results in one molecule of retinal (vitamin A), and one molecule of α-retinal, a biologically inactive analog of true vitamin A. Due to structural similarities, α-retinyl esters and vitamin A esters typically coelute, r...
Submicron peanut oil-in-water emulsion stabilised with whey proteins, was processed by ultra-high-pressure homogenisation at 200 MPa (first-stage, 2-pass homogenisation) and an initial emulsion temperature (Tin) of 24 °C. Retinyl acetate (RAC) was selected as a model of a lipophilic biomolecule...
Hepatic stellate cells (HSC) store vitamin A as retinyl esters and control circulating retinol levels. Upon liver injury, quiescent (q)HSC lose their vitamin A and transdifferentiate to myofibroblasts, e.g. activated (a)HSC, which promote fibrosis by producing excessive extracellular matrix. Adi...
A whey protein isolate (WPI) and native phosphocaseins (PC) at pH 6.5–6.6 were processed with retinyl acetate (RAC) using pressure-assisted technological tools to improve RAC embedding through processing-induced protein structural changes. To this end, protein-RAC dispersions were submitted to ...
Vitamin A deficiency is one of the major nutritional deficiencies affecting population in developing regions. In Pakistan, 60% of the child deaths are due to diarrhea and respiratory infection, which are associated with vitamin A deficiency. This study was to assess the bioavailability and stabi...
Retinyl acetate (RA) loaded polymeric nanoparticle (NP) carriers were prepared using two different single polymers, ethyl cellulose (EC) and poly (ethylene glycol)-4-methoxycinnamoylphthaloylchitosan (PCPLC). The stability of RA to aqueous solution and UVA light was significantly improved when e...
IntroductionA credible animal overactive bladder model used in basic research is an indispensable harbinger of safe and ethical clinical trials on human subjects. Our objective was to develop a new animal model of a hyperactive bladder that will be void of inflammatory urothelium lesions and dis...
ObjectiveThe purpose of this study is to elucidate the behavior of retinyl acetate in penetrating human skin without the presence of enhancers by using confocal Raman spectroscopy and molecular dynamics simulation.
β-Ionone, a precursor of carotenoids, possesses a variety of biological properties such as anti-cancerous, anti-mutagenic and anti-microbial activity. Nevertheless, anti-inflammatory effects of β-ionone remain unknown. In this study, we investigated whether ION attenuates the expression of lip...
The use of this material under current use conditions is supported by the existing information.This material was evaluated for genotoxicity, repeated dose toxicity, developmental toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity, skin sensitization potential, as well as,...
A simple and convenient synthesis of α-ionone, an important component of flowers and fragrances, is reported. The key step in the formation of the α,β-unsaturated ketone moiety involves an NHC-AuI catalyzed Meyer–Schuster-like rearrangement of readily prepared propargylic esters. The complex...
A toxicologic and dermatologic review of methyl-α-ionone when used as a fragrance ingredient is presented.
Suspension cultures of Caragana chamlagu (Leguminosae) convert (±)-α-ionone (1) into (±)-3-oxo-α-ionone (3) as the major product and β-ionone (2) into 5,6-epoxy-β-ionone (6) as the sole product. It is interesting to note that the cultured cells of C. chamlagu convert regioselectively the c...
A toxicologic and dermatologic review of dihydro-α-ionone when used as a fragrance ingredient is presented.
A toxicologic and dermatologic review of allyl α-ionone when used as a fragrance ingredient is presented.
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View