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Screening of plant extracts for antioxidant activity: a comparative study on three testing methods.
Three methods widely employed in the evaluation of antioxidant activity, namely 2,2'-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method, static headspace gas chromatography (HS-GC) andExpand
Chemical analysis and quality control of Ginkgo biloba leaves, extracts, and phytopharmaceuticals.
The chemical analysis and quality control of Ginkgo leaves, extracts, phytopharmaceuticals and some herbal supplements is comprehensively reviewed and the growing literature on pharmacokinetic and fingerprinting studies of Ginkinggo is briefly summarised. Expand
Qualitative and Quantitative Variation Among Volatile Profiles Induced by Tetranychus urticae Feeding on Plants from Various Families
It is hypothesized that plant species with a low degree of direct defense would produce more novel compounds, and almost all of the investigated plant species produced novel compounds that dominated the volatile blend, such as methyl salicylate, terpenes, oximes, and nitriles. Expand
Massetolide A Biosynthesis in Pseudomonas fluorescens
Cloning, sequencing, site-directed mutagenesis, and complementation showed that massetolide A biosynthesis in P. fluorescens SS101 is governed by three nonribosomal peptide synthetase (NRPS) genes, designated massA, massB, and massC, spanning approximately 30 kb, suggesting that these two genes function in an operon. Expand
Genome‐based discovery, structure prediction and functional analysis of cyclic lipopeptide antibiotics in Pseudomonas species
The genome‐based identification of previously unknown CLP gene clusters in plant pathogenic Pseudomonas syringae strains B728a and DC3000 and in plant beneficial Pseudomoas fluorescens Pf0‐1 and SBW25 are reported, indicating that genome mining may enable the discovery of unknown gene clusters and traits that are highly relevant in the lifestyle of plant beneficial and plant pathogen bacteria. Expand
Identification of Olfactory Stimulants for Anopheles gambiae from Human Sweat Samples
The behavioral and electroantennogram responses of female Anopheles gambiae mosquitoes to pooled samples of freshly collected human sweat and human sweat incubated for 42–52 hr were tested and responses were observed in response to indole, 6-methyl-5-hepten-2-one, and geranyl acetone. Expand
Application of ABTS radical cation for selective on-line detection of radical scavengers in HPLC eluates.
The radical cation 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonate), (ABTS*+) was utilized in an on-line HPLC method for the detection of radical scavengers in complex matrixes and can be applied to perform kinetic studies. Expand
Antioxidant activity assays on-line with liquid chromatography.
In this paper both electrochemical and chemistry-based assays are reviewed and discussed and the focus is on the mechanisms involved and differences between the assays, rather than on the matrix or analytes. Expand
Chemical analysis of Ginkgo biloba leaves and extracts.
The chemical analysis and quality control of Ginkgo leaves and extracts is reviewed and there is a lot of interest in the analysis of the undesired alkylphenols and a few validated procedures have been published. Expand
A Liquid Chromatography-Mass Spectrometry-Based Metabolome Database for Tomato1
Unbiased metabolic profiling and comparison of peel and flesh tissues from tomato fruits validated the applicability of the MoTo DB, revealing that all flavonoids and α-tomatine were specifically present in the peel, while several other alkaloids and some particular phenylpropanoids were mainly present inThe flesh tissue. Expand