Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR.

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Abstract Text:

Anja Heins,Tobias Sokolowski,Heiko ,Karin Schwarz,Anja Heins,Tobias Sokolowski,Heiko ,Karin Schwarz,

The location and the resulting chemical microenvironment of the antioxidant propyl gallate (PG) was studied in micellar solutions using the cationic emulsifier cetyl trimethyl ammonium bromide (CTAB), the anionic emulsifier sodium dodecyl sulphate (SDS) and the non-ionic emulsifier Brij 58 (polyoxyethylene-20-cetyl ester). T (1) relaxation time of the aromatic protons of PG was investigated in micellar solutions and compared with that in aqueous solution in the absence of emulsifier. The relaxation time of the PG portion that is solubilized in the micelle (T (1,eff)) was calculated from the partition behavior of PG in micellar solution. From the 1D-(1)H spectrum, the alteration in the electron density of the aromatic protons and the alteration in the peak shape of the emulsifier headgroup and alkyl chain proton signals were indicative of the location of propyl gallate in the different micelles. Nuclear Overhauser effects (NOE) made it possible to deduce the exact location of PG by calculation of the relative NOEs. Marked differences were found for the location of PG in CTAB, SDS and Brij 58 micelles. PG was found to be located in the palisade layer of CTAB micelles, in the region of the polyoxyethylene chain of Brij micelles and in the Stern layer of SDS micelles. For careful study of the location of antioxidants and therefore to be able to characterize the chemical microenvironment of the antioxidants is crucial for understanding differences in antioxidant activities as a function of lipid surfaces. The application of spectroscopic methods may help to optimize the antioxidant activity to inhibit lipid oxidation at surfaces that are formed in a wide range of foods (emulsions), cosmetics, pharmaceuticals (emulsions and carrier systems) and of biological membranes (LDL-particles).

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Publishing Authors By Initials

A Heins,T Sokolowski,H ,K Schwarz,A Heins,T Sokolowski,H ,K Schwarz,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Lipids

VOLUME: 42

Page Numbers: 561-72

Journal Abbreviation: Lipids

ISSN: 0024-4201

DAY: 20

MONTH: 04

YEAR: 2007

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 60450

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR.

AFFILIATION: Institute of Human Nutrition and Food Science, University of Kiel, Heinrich-Hecht-Platz 10, 24118 Kiel, Germany. info@foodtech.uni-kiel.de

Country: United States

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Lipids

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Investigating the location of propyl gallate at surfaces and its chemical microenvironment by 1H NMR Related Publications

• A Drosophila kinesin required for synaptic bouton formation and synaptic vesicle transport.
• Activation of TLR2 and TLR4 by glycosylphosphatidylinositols derived from Toxoplasma gondii.
• Activity of alkaline phosphatase in uterine flushings of dairy cows affected with ovarian cysts or endometritis.
• Airway management and anesthesia in neonates, infants and children during endolaryngotracheal surgery.
• Aminoglycoside resistance in members of the Staphylococcus sciuri group.
• Biofuels from microbes.
• Complete nucleotide sequence of a small qnrS1-carrying plasmid from Salmonella enterica subsp. enterica Typhimurium DT193.
• Correlates of behavioral care management strategies used by primary care pediatric providers.
• Current treatment options in uterine endometrial stromal sarcoma: report of a case and review of the literature.
• Degradation of heterocyclic aromatic amines in oil under storage and frying conditions and reduction of their mutagenic potential.
• Dislocated epitaxial islands.
• Does current knowledge explain the pathogenesis of idiopathic pulmonary fibrosis? A perspective.
• Dopamine D2/D3 receptor stimulation fails to promote dopaminergic neurogenesis of murine and human midbrain-derived neural precursor cells in vitro.
• Erectile dysfunction: risk factor or manifestation of cardiovascular disease?
• Exploring the mental number line: evidence from a dual-task paradigm.
• Identification of flavonoids and hydroxycinnamic acids in pak choi varieties (Brassica campestris L. ssp. chinensis var. communis) by HPLC-ESI-MSn and NMR and their quantification by HPLC-DAD.
• Investigating the location of propyl gallate at surfaces and its chemical microenvironment by (1)H NMR.
• Management of hypertension complicated by psychiatric comorbidity.
• Menstrual irregularity from hormonal contraception: a cause of reproductive health concerns in minority adolescent young women.
• Molecular mechanisms of decreased susceptibility to fluoroquinolones in avian Salmonella serovars and their mutants selected during the determination of mutant prevention concentrations.
• Nondecoupling of maximal supergravity from the superstring.
• Preparation and execution of saccades: the problem of limited capacity of computational resources.
• Proteome analysis of chemically induced mouse liver tumors with different genotype.
• Rapid separation of four main taxoids in Taxus species by a combined LLP-SPE-HPLC (PAD) procedure.
• Recent advances in gene delivery for structural bone allografts.
• Recent developments in superstring theory.
• Serum components and activated Ha-ras antagonize expression of perivenous marker genes stimulated by beta-catenin signaling in mouse hepatocytes.
• The location of phenolic antioxidants and radicals at interfaces determines their activity.
• The nature of the stimulatory role of the supernatant fraction on triglyceride synthesis by the alpha-Glycerophosphate pathway.
• [In Process Citation]