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Side 1 fra 18 resultater
The organic solvents acetone, ethanol and dimethylformamide potentiate the mutagenic activity of N-methyl-N'-nitro-N-nitrosoguanidine, but have no effect on the mutagenic potential of N-methyl-N-nitrosourea.
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The frequency of recessive chlorophyll and embryonic lethals included by N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) in Arabidopsis thaliana was markedly increased when exposure of the seeds to MNNG (3 h) was carried out in the presence of 4-12% acetone, 4-16% ethanol or 8-32% dimethylformamide. The
Simple extraction methods that prevent the artifactual conversion of chlorophyll to chlorophyllide during pigment isolation from leaf samples.
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BACKGROUND
When conducting plant research, the measurement of photosynthetic pigments can provide basic information on the physiological status of a plant. High-pressure liquid chromatography (HPLC) is becoming widely used for this purpose because it provides an accurate determination of a variety
Antimicrobial peptide (AMP) from Zingiber zerumbet rhizomes with inhibitory effect on Pythium myriotylum secretory proteases and zoospore viability.
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Protease mediated proteolysis has been widely implicated in virulence of necrotrophic fungal pathogens. This is counteracted in plants by evolving new and effective antimicrobial peptides (AMP) that constitute important components of innate immune system. Peptide extraction from rhizome of Zingiber
An Efficient One-Pot Synthesis of 2-(Aryloxyacetyl)cyclohexane-1,3-diones as Herbicidal 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors.
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4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is an important target for new bleaching herbicides discovery. As a continuous work to discover novel crop selective HPPD inhibitor, a series of 2-(aryloxyacetyl)cyclohexane-1,3-diones were rationally designed and synthesized by an efficient
Plant nucleoside 5'-phosphoramidate hydrolase; simple purification from yellow lupin (Lupinus luteus) seeds and properties of homogeneous enzyme.
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Adenosine 5'-phosphoramidate (NH₂-pA) is an uncommon natural nucleotide of poorly understood biochemistry and function. We studied a plant enzyme potentially involved in the catabolism of NH₂-pA. A fast and simple method comprising extraction of yellow lupin (Lupinus luteus) seed-meal with a low
High-level expression and characterization of a novel phospholipase C from Thielavia terrestris suitable for oil degumming.
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A novel phospholipase C gene (TtPLC) from Thielavia terrestris CAU709 was cloned and efficiently expressed in Pichia pastoris. The deduced protein sequence of TtPLC shared the highest identity of 33% with the characterized phospholipase C from Arabidopsis thaliana. The highest phospholipase C yield
Organic solvents inhibit the mutagenicity of promutagens dimethylnitrosamine and methylbutylnitrosamine in a higher plant Arabidopsis thaliana.
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The organic solvents dimethylsulphoxide (DMSO), acetone, ethanol and dimethylformamide inhibited the mutagenic activity of the promutagens dimethylnitrosamine and methylbutylnitrosamine in a higher plant Arabidopsis thaliana. In contrast, the direct-acting mutagens
Evaluation of three different protocols of protein extraction for Arabidopsis thaliana leaf proteome analysis by two-dimensional electrophoresis.
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This work was performed to compare three precipitation protocols of protein extraction for 2-DE proteomic analysis using Arabidopsis leaf tissue: TCA-acetone, phenol, and TCA-acetone-phenol. There were no statistically significant differences in protein yield between the three methods. Samples were
A rapid method for analysis of abscisic acid (ABA) in crude extracts of water stressed Arabidopsis thaliana plants by liquid chromatography--mass spectrometry in tandem mode.
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We describe a quick, simple method for the extraction and quantification of the phytohormone (+)-abscisic acid (ABA) in samples of plants subjected to different water deficit treatments. The method includes an extraction with acetone/water/acetic acid (80:19:1, v/v), evaporation of the extracts and
Construction of synthetic pathways for raspberry ketone production in engineered Escherichia coli.
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Raspberry ketone is an important ingredient in the flavor and fragrance industries. Due to its low content in fruits and vegetables, the production of natural raspberry ketone using heterologous synthesis in microbial strains is recently attracting increased attention. In this work, a heterologous
Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers.
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The rhythmic opening/closing and volatile emissions of flowers are known to attract pollinators at specific times. That these rhythms are maintained under constant light or dark conditions suggests a circadian clock involvement. Although a forward and reverse genetic approach has led to the
Proton-transfer-reaction mass spectrometry as a new tool for real time analysis of root-secreted volatile organic compounds in Arabidopsis.
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Plant roots release about 5% to 20% of all photosynthetically-fixed carbon, and as a result create a carbon-rich environment for numerous rhizosphere organisms, including plant pathogens and symbiotic microbes. Although some characterization of root exudates has been achieved, especially of
Phenolic compounds from Merremia umbellata subsp. orientalis and their allelopathic effects on Arabidopsis seed germination.
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A bioassay-directed phytochemical study was carried out to investigate potential allelochemicals of the invasive plant Merremia umbellata subsp. orientalis (Hall. f.). Eight phenolic compounds, including a salicylic acid (SA)-derived new natural product, SA 2-O-β-D-(3',6'-dicaffeoyl)-glucopyranoside
Proteomic Approaches to Identify Proteins Responsive to Cold Stress
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Changing environmental conditions greatly affect the accumulation of many proteins; therefore, the analysis of alterations in the proteome is essential to understand the plant response to abiotic stress. Proteomics provides a platform for the identification and quantification of plant proteins
Deriving metabolic engineering strategies from genome-scale modeling with flux ratio constraints.
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Optimized production of bio-based fuels and chemicals from microbial cell factories is a central goal of systems metabolic engineering. To achieve this goal, a new computational method of using flux balance analysis with flux ratios (FBrAtio) was further developed in this research and applied to
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