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Страница 1 от 20 полученные результаты
DDT and benzene hexachloride for potato flea beetle control.
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Benzene hexachloride, DDT, and chlordane for Colorado potato beetle control.
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[Methodological hints on the gas chromatographic determination of kelevan and kepone in potatoes, potato foliage and soil].
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The gas chromatographic determination of Kelevan, an ethyllaevulinic acid derivative of Kepone, requires its conversion to Kepone. Thermal decomposition in the injection block of the gas chromatograph at 45 degrees C. has proved to be well suited for routine work. The sample is extracted with
Modification of substrate specificity resulting in an epoxide hydrolase with shifted enantiopreference for (2,3-epoxypropyl)benzene.
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Random mutagenesis targeted at hotspots of noncatalytic active-site residues of potato epoxide hydrolase StEH1 combined with an enzyme-activity screen allowed the isolation of enzyme variants displaying altered enantiopreference in the catalyzed hydrolysis of (2,3-epoxypropyl)benzene. The wild-type
[Determination of furanoterpenoid toxins from sweet potato by thin-layer chromatography].
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Sweet potato root tissue, when infected with different pathogens, invaded by insects, or irritated by certain chemicals, turns black-brown and produces and accumulates a large amount of furanoterpenoids such as ipomeamarone, ipomeamaronol, ipomeanine and 4-ipomeanol, which are toxic to animals. The
Partial purification and characterization of UDPG:t-cinnamate glucosyltransferase in the root of sweet potato, Ipomoea batatas Lam.
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Previously, we isolated t-cinnamoyl-D-glucose as a possible intermediate in chlorogenic acid biosynthesis from sweet potato root. The enzyme which catalyzes the formation of t-cinnamoyl-D-glucose has been purified 539-fold from sweet potato root (Ipomoea batatas Lam.) and characterized. It required
Effects of aqueous phase recirculation in hydrothermal carbonization of sweet potato waste.
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Aqueous phase recirculation was investigated in hydrothermal carbonization of sweet potato waste at 220 °C for 60 min. The result showed that the aqueous phase reuse significantly increased the hydrochar yield. The lower H/C and O/C ratios indicated that decarboxylation reaction was promoted. The CC
Oxidative degradation of bisphenol a by crude enzyme prepared from potato.
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When crude enzymes prepared from some vegetables and fruits were incubated with bisphenol A (2,2-bis(4-hydroxyphenyl)propane, BPA) at 37 degrees C, BPA was oxidized by crude enzymes from potato, eggplant, and lettuce. The crude enzyme prepared from potato (Solanum tuberosum) had the strongest
Insecticidal metabolites from the rhizomes of Veratrum album against adults of Colorado potato beetle, Leptinotarsa decemlineata.
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The dried rhizomes of Veratrum album were individually extracted with CHCl3 , acetone, and NH4 OH/benzene to test the toxic effects against the Colorado potato beetle, Leptinotarsa decemlineata, which is an important agricultural pest. Fifteen compounds in various amounts were isolated from the
Different pathways for 4-n-nonylphenol biodegradation by two Aspergillus strains derived from estuary sediment: Evidence from metabolites determination and key-gene identification.
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Nonylphenols (NPs) are known as Endocrine Disputing Chemicals (ECDs) and Persistent Organic Pollutants (POPs) and have attracted continuous attention. Biodegradation is one of the effective ways for pollutant removal in aquatic, sedimentary and soil environments. In this study, two estuarine derived
Polyphenol oxidase inhibitor from blue mussel (Mytilus edulis) extract.
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Enzymatic browning remains a problem for the fruit and vegetable industry, especially new emerging markets like pre-cuts. A crude inhibitor from blue mussel (Mytilus edulis) showed broad inhibition for apple (58%), mushroom (32%), and potato (44%) polyphenol oxidase (PPO) and was further
Anion uniport in plant mitochondria is mediated by a Mg(2+)-insensitive inner membrane anion channel.
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It has long been established that the inner membrane of plant mitochondria is permeable to Cl-. Evidence has also accumulated which suggests that a number of other anions such as Pi and dicarboxylates can also be transported electrophoretically. In this paper, we present evidence that anion uniport
Electrochemical detection combined with machine learning for intelligent sensing of maleic hydrazide by using carboxylated PEDOT modified with copper nanoparticles.
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A method for intelligent data analysis was designed by combining electrochemical sensing with machine learning (ML). Specifically, a voltammetric sensor is described for determination of the phytoinhibitor maleic hydrazide in crop samples. Carboxyl-functionalized poly(3,4-ethylenedioxythiophene)
Single-laboratory validation of a method for the determination of select volatile organic compounds in foods by using vacuum distillation with gas chromatography/mass spectrometry.
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Recent studies showed that headspace and purge and trap methods have limitations when used to determine volatile organic compounds (VOCs) in foods, including matrix effects and artifact formation from precursors present in the sample matrix or from thermal decomposition. U.S. Environmental
Establishment of Residue Analysis of Propanil (Dichloropropionanilide), Linuron and Diphenamide in Agricultural Commodities.
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A method for simultaneous determination of residues of three herbicides containing nitrogen, propanil (3',4'-dichloropropionanilide), linuron and diphenamide, in agricultural commodites was established. The herbicides were extracted by acetone from samples, transferred into dichloromethane, then the
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