• Characterization and analysis across the scales is by X-ray computed topography (CT), mercury intrusion porosimetry (MIP), N2 adsorption/desorption [Brunauer-Emmett-Teller (BET)], and nuclear magnetic resonance (NMR). (acs.org)
  • Because arsenate concentration in the mud fluids was found to be independent from geochemical factors, it was considered that organic matter may induce arsenic mobilization through an adsorption/desorption mechanism with humic substances under reducing conditions. (edu.au)
  • Living systems are full of interfaces and they have adopted to regulate adsorption/ desorption processes. (lu.se)
  • Chromatography allows for the separation of a mixture of compounds by diluting the mixture into a mobile phase which then passes through or over a stationary phase to create separation by the interaction and affinity of individual compounds for one of the phases of the chromatography system ( Figure 1a ). (cannabissciencetech.com)
  • HILIC has advantages over conventional reversed phase or normal phase liquid chromatography as retention and separation of many polar analytes has proven to be a challenge as often unretained or poorly retained on most conventional reversed-phase stationary phases. (chromatographytoday.com)
  • A method of gel filtration chromatography using agarose, the non-ionic component of agar, for the separation of compounds with molecular weights up to several million. (lookformedical.com)
  • Various aspects are discussed thoroughly, such as the mechanism of lactic acid production through fermentation, the crucial factors that influence the fermentation process, and the separation and recovery process of conventional and advanced lactic acid separation methods. (springeropen.com)
  • This review's highlight is the recovery of lactic acid by adsorption technique using ion-exchange resins with a brief focus on the potential of in-site separation strategies alongside the important factors that influenced the lactic acid recovery process by ion exchange. (springeropen.com)
  • T c {\displaystyle T_{c}} +10 Isotherms in the first region will show the feature of subcritical adsorption. (wikipedia.org)
  • Isotherms in the second region will show the feature of mechanism transition. (wikipedia.org)
  • Isotherms in the third region will show the feature of supercritical adsorption. (wikipedia.org)
  • The transition will take a continuous way if the isotherms in both sides of the critical temperature belong to the same type, such as adsorption on microporous activated carbon. (wikipedia.org)
  • However, discontinuous transition could be observed on isotherms in the second region if there is a transformation of isotherm types, such as adsorption on mesoporous silica gel. (wikipedia.org)
  • In Paper I , surface excess adsorption isotherms of the co-solvent methanol on a diol silica adsorbent was investigated. (fssg.se)
  • Adsorption kinetics, isotherms, and simulation calculations studies further reveal the presence of monolayer adsorption, chemical adsorption process, and multiple interactions. (bvsalud.org)
  • Two different underlying mechanisms for solute peak distortions were revealed: (i) deformations generated by the perturbation peak and (ii) deformation due to multilayer formation promoted by the additive. (fssg.se)
  • Chromatography on non-ionic gels without regard to the mechanism of solute discrimination. (lookformedical.com)
  • Herein, a simple, sensitive and reproducible method for the simultaneous stereoselective analysis of metalaxyl and its metabolite metalaxyl acid in animal-derived foods has been established based on mixed-mode anion exchange solid phase extraction and chiral liquid chromatography-tandem mass spectrometry. (bvsalud.org)
  • Lead Surprisingly, chiral chromatography could not be performed in 1980 because there was no single chiral stationary phase on the market. (chiralpedia.com)
  • But as the 1980s came to a close, chiral chromatography began to get more and more attention, thanks in large part to the efforts of Okamoto's institute in Japan, Pirkle and Armstrong's teams in the US, Schurig and König in Germany, Lindner in Austria, and Francotte in Switzerland. (chiralpedia.com)
  • Lead A wide range of chiral compounds have been examined as chiral selectors with regard to their ability to separate enantiomers using chromatography as part of the development of CSPs. (chiralpedia.com)
  • For this September issue of The Application Notebook should be reaching our audience of analytical chemists, lab managers, and other industry professionals just as the busiest time of the year ramps up in the world of chromatography. (chromatographyonline.com)
  • Since the initial discoveries of the early to mid-20th century the science of chromatography has seen rapid growth and expansion into an important and fundamental tool of many analytical laboratories. (cannabissciencetech.com)
  • Analytical chromatography is used in quantitative and qualitative analysis of complex mixtures. (cannabissciencetech.com)
  • Gas chromatography is predominately used for analytical methods, rather than preparatory methods. (cannabissciencetech.com)
  • This mechanism has been scrutinised in detail by an analytical evaluation with many different stationary phases in a comprehensive analysis [2], the conclusion being that HILIC retention is a combination of electrostatic adsorption and hydrogen bonding interactions [2]. (chromatographytoday.com)
  • Analytical results suggested that the anoxic mud volcanic fluids are highly saline, implying connate water as the probable source. (edu.au)
  • Samples of spent catalysts were dumped out from the reactor and investigated with physic and chemical analytical methods (elemental CHNS-analysis, simultaneous thermal analysis (STA), low-temperature nitrogen adsorption, X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HR-TEM). (tmweb.ru)
  • The developed polymer has high surface area, large conjugate system, and abundant functional groups (e.g., π-π stacking, hydrogen bonding, hydrophobic and electrostatic attraction interactions), which endow it with superior affinity and high adsorption capacity for sulfonamides (16.16-59.29 mg g-1). (bvsalud.org)
  • Gas chromatography (GC) uses a carrier gas, such as hydrogen or helium, to separate compounds based on their interaction with a stationary phase or based on their boiling points. (cannabissciencetech.com)
  • This is because a fluid cannot undergo a transition to a liquid phase at above-critical temperature, regardless of the pressure applied. (wikipedia.org)
  • Adsorbate in the adsorbed phase is largely in liquid state, based on which different adsorption and thermodynamic theories as well as their applications were developed. (wikipedia.org)
  • The interest in SFC has recently increased due to several advantages compared to traditional liquid chromatography (LC) such as faster sample throughput and lower environmental impact. (fssg.se)
  • Three critical aspects were tested: (i) Solid-Phase Extraction - Ultra-Performance Liquid Chromatography and Tandem Mass Spectrometry (SPE-UHPLC-MS/MS) method performance, (ii) biomarker stability under variable storage conditions (during sampling and long-term storage) and (iii) accounting for human metabolism in WBE back-calculations. (bvsalud.org)
  • From simple separations to detailed wavelength analysis, we examine the important concepts and techniques needed to make liquid chromatography work its best in the laboratory. (cannabissciencetech.com)
  • In this column, we will examine an important branch of chromatography essential to the cannabis industry-liquid chromatography. (cannabissciencetech.com)
  • Their work established a form of chromatography called partition chemistry and was the basis for methods we now know as paper, gas, and liquid chromatography. (cannabissciencetech.com)
  • Stationary phase is a liquid or solid material that is fixed in a chromatography system. (cannabissciencetech.com)
  • Chromatography processes are further divided into two major categories (liquid or gas chromatography) based on the composition of their mobile phase component. (cannabissciencetech.com)
  • In liquid chromatography (LC), compounds are separated by dissolving a sample into a liquid mobile phase which is then passed over a solid stationary phase. (cannabissciencetech.com)
  • Liquid Chromatography as a Game-Changer in Measuring. (chromatographytoday.com)
  • One recent article describes the use of hydrophilic solid phase extraction of glycyrrhizin (GA) in liquorice coupled with reversed-phase liquid chromatography purification, and although this method improved enrichment of GA, HILIC was only employed as a crude extraction procedure [9]. (chromatographytoday.com)
  • Simultaneous determination of four plant hormones in bananas by molecularly imprinted solid-phase extraction coupled with high performance liquid chromatography. (mipdatabase.com)
  • Miniaturized molecularly imprinted matrix solid-phase dispersion coupled with high performance liquid chromatography for rapid determination of auxins in orange samples. (mipdatabase.com)
  • New polymeric sorbent for the solid-phase extraction of indole-3-acetic acid from plants followed by liquid chromatography - Fluorescence detector. (mipdatabase.com)
  • Multipoint recognition of domoic acid from seawater by dummy template molecularly imprinted solid-phase extraction coupled with high-performance liquid chromatography. (mipdatabase.com)
  • Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix. (lookformedical.com)
  • A mobile phase (fluid or gas) passes through a column containing a stationary phase of porous solid or liquid coated on a solid support. (lookformedical.com)
  • This thesis work aims at a deeper understanding of the functions of the mobile phase components used in SFC through systematic adsorption studies. (fssg.se)
  • The mechanism being that polar analytes interact with a hydrophilic stationary phase and the elution generated by mixing a predominantly aprotic solvent (usually acetonitrile) with a strong eluting solvent (usually water). (chromatographytoday.com)
  • It is commonly used as a desiccating agent and as a stationary phase for CHROMATOGRAPHY. (lookformedical.com)
  • Considerable progress has been made in both adsorption measurement techniques and molecular simulation of adsorption on computers, rendering new insights into the nature of supercritical adsorption. (wikipedia.org)
  • Molecular modeling and docking technology, which is efficient, accurate and simple to use, can reproduce the true interaction process between drug and targets that some of the current laboratory techniques are unable to detect, and is a method for predicting the mechanism of action of a drug ( 19 ). (spandidos-publications.com)
  • Therefore, molecular docking was also used in the present study to simulate the binding of cordycepin with different antibacterial targets, such as β-ketoacyl-(acyl-carrier-protein) synthase III (FabH), DNA gyrase B and thymidylate kinase, in order to identify the most likely antimicrobial mechanism of cordycepin. (spandidos-publications.com)
  • and on the study of secondary metabolites in plant foods, exploring the molecular mechanisms that explain their activity. (researchgate.net)
  • It basically comprises a gas expansion process from a storage vessel (reference cell) to an adsorption chamber including adsorbent (adsorption cell) through a controlling valve C, as schematically shown in Figure 1. (wikipedia.org)
  • A dry and degassed adsorbent sample of known weight was enclosed in the adsorption cell. (wikipedia.org)
  • The disadvantage of volumetric measurements is the considerable amount of adsorbent sample needed to overcome adsorption effects on the walls of the vessels. (wikipedia.org)
  • Chemical constituents (cations, anions, trace elements, organic carbon, humic acid, and stable isotopes) in both fluids and mud were analyzed to investigate the geochemical processes and spatial variability among the mud volcanoes under consideration. (edu.au)
  • Considerable amounts of arsenic in mud irrespective of fluid composition suggested possible release through biogeochemical processes in the subsurface environment. (edu.au)
  • In the studies of supercritical extraction, however, "supercritical fluid" is applied for a narrow temperature region of 1-1.2 T c {\displaystyle T_{c}} or T c {\displaystyle T_{c}} to T c {\displaystyle T_{c}} +10 K, which is called the supercritical region. (wikipedia.org)
  • The present study deals with geochemical characterization of mud fluids and sediments collected from Kunshuiping (KSP), Liyushan (LYS), Wushanting (WST), Sinyangnyuhu (SYNH), Hsiaokunshui (HKS) and Yenshuikeng (YSK) mud volcanoes in southwestern Taiwan. (edu.au)
  • Volcanic mud and fluids are rich in organic matter (in terms of organic carbon), and the presence of humic acid in mud has implications for the binding of arsenic. (edu.au)
  • In Paper II , severe peak deformation effects due to this adsorption were revealed, and it was demonstrated under which conditions these deformations appear and how the co-solvent fraction can tune the shape of the eluted peak. (fssg.se)
  • Substrate-Assisted Mechanism for the Degradation of N-glycans by a Gut Bacterial Mannoside Phosphorylase. (toulouse-biotechnology-institute.fr)
  • First-principles approximations of the intrinsic catalytic reaction mechanisms towards different agents in Zr-MOFs are summarized, and developments in the structure-property relationships governing Zr-MOF design rules for efficient degradation in the aqueous and solid phases are discussed. (preprints.org)
  • Due to their exceptional porosities and large surface areas, MOFs possess superior adsorption, reactivity, and catalytic abilities, making them structurally ideal candidates for the capture and decomposition of target species. (preprints.org)
  • Categorize Biological Membranes And Various Mechanisms Of Transport Of Molecules Through Membranes. (uaeu.ac.ae)
  • Milk, Human is a complex biological fluid produced by the mammary glands of human females to nourish and support the growth and development of their infants. (lookformedical.com)
  • T c {\displaystyle T_{c}} is the critical temperature) Observations of supercritical adsorption reported before 1930 was covered in studies by McBain and Britton. (wikipedia.org)
  • An adsorption isotherm depicts the relation between the quantity adsorbate and the bulk phase pressure (or density) at equilibrium for a constant temperature. (wikipedia.org)
  • The volume of the connecting tube between the adsorption cell and valve is divided into two parts: one part with volume V t {\displaystyle V_{t}} with same temperature as the reference cell. (wikipedia.org)
  • A total of 14 samples are classified into three types of mercury intrusion/extrusion curves, indicative of pores with a well-developed adsorption-seepage structure, with poor connection, and alternately those that are adsorption-dominated. (acs.org)
  • Volumetric method was used in the early days of adsorption studies by Langmuir, Dubinin and others. (wikipedia.org)
  • This fundamental law determines the different adsorption mechanism for the subcritical and supercritical regions. (wikipedia.org)
  • Such equilibrium data are required for optimal design of process relying on adsorption and are considered fundamental information for theoretical studies. (wikipedia.org)
  • Although studies have shown that cordycepin is a broad-spectrum antibiotic ( 18 ), studies focusing on the mechanism of the antibacterial activity and the possible targets are lacking. (spandidos-publications.com)
  • A comprehensive insight into apoptotic signaling pathways and an understanding of the mechanisms of apoptosis resistance are crucial to unveil new drug targets. (researchgate.net)
  • 3. Multivariate linear regression analysis of the adsorptions of bensulfuron-methyl by each soils shows that were interrelated to the physical and chemical characteristics of the soils. (tymago.com)
  • The interplay between ecological, physiological, and human health effects underscores the need for a comprehensive understanding of mercury's underlying mechanisms. (preprints.org)