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Chemical FractionationCell FractionationFractionation, Field FlowSubcellular FractionsAbstracting and Indexing as TopicMolecular Sequence DataChemical PhenomenaMolecular WeightModels, ChemicalKineticsAmino Acid SequenceMagnetic Resonance SpectroscopyChemistry Techniques, AnalyticalMolecular StructureChromatographyElectrophoresis, Polyacrylamide GelCongresses as TopicMultiple Chemical SensitivityChromatography, GelCell MembraneChromatography, Ion ExchangeChromatography, High Pressure Liquid
Crystal fractionationFlow field-flow fractionIsotope fractionationCharacterizationChromatographyIsotopic characteristicsAdsorptionLignocelluloseConstituentsBiomassMagmasExperimentsSequentialCrustalProcessesEquilibriumMagmaKineticCharacteristicsReactiveOxygenIsolationExperimentalSelectiveInvestigationInvestigateStabilization mechanismsMineralHydrocarbonsTraceMembraneBoundaryBiologicalExtractParticlesBulletin of the Korean Chemical SocietyPAHsPartialOrganic chemicalsEngineeringMethodGeologyFuelsDataLiquorResultsLarge
Crystal fractionation2
  • Although there is abundant petrographic evidence for magma mingling in the petrogenesis of this granitoid suite, the curvilinear nature of many of the chemical trends indicates an additional contribution from crystal fractionation. (edu.au)
  • The chemical and mineralogical variability of the evolved rocks is due to crystal fractionation in the crust and to contamination by crustal minerals and partial melts of crustal rocks. (geoscienceworld.org)
Flow field-flow fraction2
  • Hollow Fiber flow field-flow fractionation (HF-F1FFF) has been tested in polyacrylonitrile (PAN) membrane channel in order to compare it with polysulfone (PSf) membrane channel. (elsevierpure.com)
  • This article gives an overview of a recently developed channel system, frit-inlet asymmetrical flow field-flow fractionation (FI-AFIFFF), which can be applied for the separation of nanoparticles, proteins, and water soluble polymers. (elsevierpure.com)
Isotope fractionation5
  • Friedman I, O'Neil JR (1977) Compilation of stable isotope fractionation factors of geochemical interest. (springer.com)
  • Grossman EL, Ku TL (1986) Oxygen and carbon isotope fractionation in biogenic aragonite: temperature effects. (springer.com)
  • There are large discrepancies existing in equilibrium Mg isotope fractionation calculations and experimental investigations for cases related to mineral vs. solution. (gyig.ac.cn)
  • To clarify this confusing issue, a newly designed clustermodel- based quantum chemistry method, i.e., volume variable cluster model (VVCM), is used to provide equilibrium Mg isotope fractionation factors between Mg-bearing carbonates (calcite, aragonite, dolomite and magnesite), amorphous calcium carbonates (ACCs), brucite and aqueous species (i.e. (gyig.ac.cn)
  • Equilibrium Mg isotope fractionation factors between brucite and solutions are also predicted. (gyig.ac.cn)
Characterization2
  • Fractionation and chemical characterization studies on Micropolyspora faeni antigens. (cdc.gov)
  • Chemical fractionation is a widely used tool for the chemical and toxicological characterization of complex mixtures. (tamu.edu)
Chromatography1
  • Gas chromatography and mass spectrometry were used to quantify the chemical components in all fractions. (tamu.edu)
Isotopic characteristics1
  • Mixing of 5% highly enriched lithospheric melt with 95% asthenospheric melt will generate basalts with the chemical and isotopic characteristics observed. (confex.com)
Adsorption2
  • The aims of the present study were to investigate the effects of mariculture activities on inorganic mercury (Hg 2+ ) adsorption/desorption on sediments and the distributions of newly adsorbed Hg 2+ on different chemical fractionations. (eduhk.hk)
  • It has been suggested that this isotopic fractionation is controlled by the kinetic isotope effect of Si adsorption to Aluminum hydroxides, which takes place in early stages of weathering. (wikipedia.org)
Lignocellulose1
  • Noble metal-based catalysts are widely used to intensify the processes of reductive fractionation of lignocellulose biomass. (catalysis.ru)
Constituents2
  • Antimicrobial activities of chemical constituents from the flowers of Hypericum lanceolatum Lam. (bluepenjournals.org)
  • Hence, the aim of this study was to investigate the antibacterial and antifungal properties of the chemical constituents from the flowers of Hypericum lanceolatum Lam (Hypericaceae). (bluepenjournals.org)
Biomass1
  • The main aim of this work was to assess the possibility of using biomass ashes as substitutes for cement and natural aggregates in concretes without compromising their mechanical and chemical properties. (unl.pt)
Magmas1
  • Preliminary geochemical and petrological analysis of the Keiths Dome Pluton and intrusive dikes in the Tuttle Lake Formation shows evidence for low pressure fractionation of magmas from multiple magmatic systems. (confex.com)
Experiments4
  • First, supercritical CO2 fractionation experiments were carried out at pressures (10-12) MPa, and temperatures (313-338) K. Secondly, the modeling of the raffinate and extract compositions for 12 selected compounds including sclareol was performed using the group method. (hal.science)
  • In order to facilitate interpretation of those data, we investigated the fractionation of Ni stable isotopes during sorption to synthetic ferrihydrite, which was likely the primary precipitating phase during BIF deposition, via bench-top experiments. (nau.edu)
  • thus the fractionations in all of our experiments are the same within uncertainties. (nau.edu)
  • The method can be used for automated detection of chemical/post- translational modifications, quality control of experiments and labelling approaches, and to control the modification settings of protein identification tools. (lu.se)
Sequential2
  • In order to assess the environmental pollution status, 2 environmental factors were established, while for the determination of chemical fractionation of toxic metals a sequential extraction procedure was carried out. (tubitak.gov.tr)
  • Here, we applied a sequential chemical fractionation method integrated with network analysis to investigate MAOM stabilization mechanisms across five alpine ecosystems alpine desert , alpine steppe , alpine meadow , alpine wetland, and alpine forest . (bvsalud.org)
Crustal1
  • La/Lu increases with fractionation, suggesting crustal or lithospheric assimilation. (confex.com)
Processes3
  • As the relative abundance of Si stable isotopes varies among different natural materials, the differences in abundance can be used to trace the source of Si, and to study biological, geological, and chemical processes. (wikipedia.org)
  • The physico-chemical properties of TPO confirm the use of TPO as furnace oil in various industrial processes. (banglajol.info)
  • Oxygen isotopologues are useful tools for understanding biogeochemical processes and chemical budgets in the ocean. (rice.edu)
Equilibrium1
  • Theoretical calculation of equilibrium Mg isotope fractionations between minerals and aqueous solutions[J]. Chemical Geology,2018,488:62-75. (gyig.ac.cn)
Magma2
  • The second trend may result from the fractionation of large batches of primitive magma that were stored in the crust, while the third trend represents increased melt fractions or repeated melting of a refractory source (possibly due to continued melting of a single source region). (confex.com)
  • Contrary to this, trace element systematics suggests fractionation of a single magma system is unlikely. (confex.com)
Kinetic2
  • kinetic fractionation across the air-water boundary is therefore expected to be important. (rice.edu)
  • These kinetic fractionation effects may provide additional constraints on O 2 cycling in the surface and deep ocean. (rice.edu)
Characteristics2
  • The olivine basalts are remarkably similar in chemical, mineralogical, and textural characteristics. (geoscienceworld.org)
  • Due to the different physic and chemical characteristics of the studied matrices, the uncertainty of precision was evaluated using R-charts of data obtained from the analysis of duplicates for the majority of samples. (unl.pt)
Reactive1
  • Nevertheless, it was observed that the reactivity estimated by chemical fractionation could not be solely interpreted as tendency of the elements to volatilize on FBC system, as reaction in bed zone of boiler may also occur retaining reactive elements. (unl.pt)
Oxygen1
  • Ozonation was tested on selected streams of cotton finishing textile plant wastewater for optimizing chemical oxygen demand (COD) removal. (itu.edu.tr)
Isolation1
  • In search of new natural products with respect to pharmaceutical lead discovery of antifungal and anticancer agents, bioassay-guided fractionation and chemical investigation of the methanol extract of the dried fruit of Piper retrofractum led to the isolation of three new amides, namely (2 E ,14 Z )-N-isobutyleicosa-2,14-dienamide ( 1 ), dipiperamides F and G ( 2 and 3 ), together with 30 known compounds. (thieme-connect.com)
Experimental3
  • No isotopic fractionation of boron was observed in the diffusion zone at the experimental conditions. (uni-muenchen.de)
  • The aim of this study was to model experimental results obtained for the supercritical CO2 fractionation of a liquid mixture containing 24% of sclareol in order to recover a raffinate with increased sclareol content. (hal.science)
  • Results obtained showed that for FBC the relation between the chemical fractionation and the experimental partitioning is strongly affected by elutriation of particles. (unl.pt)
Selective2
  • This paper presents the results of standard fuel analyses of 112 different fuels, along with the results from chemical fractionation through selective leaching. (abo.fi)
  • The study demonstrates the value of chemical fractionation through selective leaching as a tool for explaining ash behavior in FBC. (abo.fi)
Investigation2
  • Chemical investigation of the steam-volatile oil of the shrub Rubus rosifolius yielded pregeijerene (2), β-caryophyllene (3), humulene (4), dihydroagarofuran (5), an unidentified sesquiterpene ether, hedycaryol (6) and the novel epieudesmol rosifoliol for which structure (1) is proposed. (researchgate.net)
  • In the present investigation, we proposed for the first time using the inexpensive NiCuMo/SiO2 catalyst to replace Ru-, Pt-, and Pd-containing catalysts in the process of reductive fractionation of abies wood into bioliquids and cellulose products. (catalysis.ru)
Investigate2
  • Three different approaches to investigate the ash behaviour were employed: (1) chemical fractionation analysis to evaluate the association/reactivity of ash forming elements in the fuels as a prediction tool, (2) establishment of elements partitioning in ash streams produced in the combustion and co-combustion trials, and (3) evaluation of enrichment factors of elements in the ash streams. (unl.pt)
  • We have observed the DNC (J=1-0) and HN 13 C (J=1-0) lines toward 29 nearby dark cloud cores to investigate a variation of deuterium fractionation. (unistra.fr)
Stabilization mechanisms1
  • Methodologically, recalcitrance is difficult to assess, since the persistence of certain SOM fractions or specific compounds may also be caused by other stabilization mechanisms, such as physical protection or chemical interactions with mineral surfaces. (uni-bayreuth.de)
Mineral1
  • We find that local configuration sampling of aqueous species is essential to provide precise fractionations between mineral and solution. (gyig.ac.cn)
Hydrocarbons1
  • CBs can entrap a wide range of chemical compounds, such as PAHs, hydrocarbons, trace elements and nicotine, produced both by tobacco combustion and treatment during cultivation and manufacture. (easychair.org)
Trace3
  • Moderate changes in major elements coupled with large variations in trace elements in vitrophyres from the Thomas Range are generally consistent with fractionation of observed phenocrysts. (geoscienceworld.org)
  • Nonetheless, disagreement between major and trace element models regarding the degree of crystallization as well as improbably high D Ta and D Th suggest that some diffusive differentiation involving the migration of trace elements complexed with volatiles also occurred or that monazite, titanite or samarskite fractionation was important. (geoscienceworld.org)
  • Brand U, Veizer J (1980) Chemical diagenesis of a multicomponent carbonate system-1: trace elements. (springer.com)
Membrane1
  • After receiving his PhD in 2005 he continued as a researched in the lignin fractionation field working with membrane filtration and with the Lignoboost process in cooperation with Inventia. (lu.se)
Boundary1
  • The phonon-based periodic boundary method is also used for several minerals and it obtains very similar fractionations with VVCM results. (gyig.ac.cn)
Biological1
  • The most comprehensive collection of chemical and biological modi- fications being relevant to mass spectrometry can be found in UniMod [12]. (lu.se)
Extract1
  • Chromatographic fractionation of the alcoholic extract of leaves of Punica granatum L. var. (phytojournal.com)
Particles1
  • The element enrichment factor estimated for each ash stream, using Al as a reference element, revealed better correlations with the elements reactivity obtained by chemical fractionation because it overcomes particles elutriation effects. (unl.pt)
Bulletin of the Korean Chemical Society2
PAHs2
  • Overall, the results of these bioassays suggest that PCP genotoxicity was expressed in the acid fraction, whereas the cumulative genotoxicity of genotoxic PAHs appeared to be masked in the isolates from either fractionation method. (tamu.edu)
  • The optimal fractionation method for a mixture of chlorophenols and PAHs may involve a refined hybrid method. (tamu.edu)
Partial1
  • They were derived by partial melting of the lithospheric mantle at 45 to 60 km, and they have been little affected by fractionation or contamination. (geoscienceworld.org)
Organic chemicals1
  • 1974. The industrially significant organic chemicals -- Part 2. (cdc.gov)
Engineering3
  • Chemical Engineering Communication 4:721-727. (cdc.gov)
  • Masters thesis, Universiti Teknologi Malaysia, Faculty of Chemical Engineering. (utm.my)
  • Ola Wallberg, PhD, is an associate Professor at the department of Chemical Engineering at Lund University. (lu.se)
Method2
  • Mechanochemical method is an efficient processing method that uses mechanical means to change the structure and physical and chemical properties of objects. (researchgate.net)
  • The first method involved fractionation of the WPW into acid, base, and neutral fractions using a liquid-liquid acid/base/neutral (A/B/N) technique. (tamu.edu)
Geology2
Fuels1
  • The chemical fractionation analysis was applied to all fuels used to evaluate how the association/reactivity of elements making up ash may influence their behaviour during combustion. (unl.pt)
Data3
  • The chemical data on the 3 components fractionated with ammonium- sulfate are given (percent dryweight, percent amino acids, percent carbohydrate). (cdc.gov)
  • Although there is less available data on the isotopic fractionation during biomineralization by radiolarians, it has been suggested that radiolarians also discriminate against the heavy isotope (30Si), and that the magnitude of isotopic fractionation is of a similar range as biomineralization by diatoms. (wikipedia.org)
  • The data obtained show that the catalyst NiCuMo/SiO2 can successfully replace noble metal catalysts in the process of abies wood reductive fractionation into bioliquids and cellulose. (catalysis.ru)
Liquor1
  • The main achievement was the development of operating procedures for ultrafiltration of kraft black liquor at temperatures above the normal boiling point and in achieving fractionation between hemicelluloses and lignin in the liquor. (lu.se)
Results1
  • Although our simple system differs from Archaean seawater, our results suggest that ferrihydrite precipitating to form BIFs may always have been offset by a constant fractionation from coexisting dissolved Ni in seawater. (nau.edu)
Large1
  • The reason for this relatively large isotopic fractionation remains unclear, mainly because the mechanisms of Si uptake by plants are yet to be understood. (wikipedia.org)