• Further contributions of Gil-Av and associates are concerned with the use of chiral mobile phase additives (CMPAs) in liquid chromatography (LC), enantiomeric separation of helicenes by supramolecular LC, the temperature-dependent reversal of enantioselectivity by enthalpy-entropy compensation and non-linear effects leading to enantiomeric enrichment during chromatography on achiral stationary phases. (wikipedia.org)
  • E. Gil-Av, B. Feibush, R. Charles-Sigler: Separation of Enantiomers by Gas Liquid Chromatography With an Optically Active Stationary Phase, Tetrahedron Lett. (wikipedia.org)
  • P. E. Hare, E. Gil-Av: Separation of D and L Amino Acids by Liquid Chromatography: Use of Chiral Eluants, Science 204 (1979) 1226-1228. (wikipedia.org)
  • 1984. Application of high-performance liquid chromatography with synchronized accumulating radioisotope detector to analysis of glyceryl trinitrate and its metabolites in rat plasma. (cdc.gov)
  • Therefore, the present work is focus on isolating target sesquiterpenes rapidly via the strategy of high-pressure liquid chromatography coupled with electrospray ionization-quadrupole time-of-flight mass spectrometry (HPLC-ESI-Q-TOF-MS/MS) combined with high-speed counter-current chromatography (HSCCC). (researchsquare.com)
  • Detergent extraction of herpes simplex virus type 1 glycoprotein D by zwitterionic and non-ionic detergents and purification by ion-exchange high-performance liquid chromatography. (sigmaaldrich.com)
  • Eleven fractions of IC 70 BA isomers were separated by high-performance liquid chromatography. (beilstein-journals.org)
  • The main emphasis of his work constituted chiral chromatography for the analytical separation of enantiomers. (wikipedia.org)
  • 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)
  • Precoated silica gel 60 F 254 plates (Merck) for thin layer chromatography (TLC) were used. (hindawi.com)
  • The method employed HPTLC aluminium plates precoated with silica gel 60 F 254 as the stationary phase. (hindawi.com)
  • In order to isolated the active compounds quickly, the strategy of HPLC-ESI-Q-TOF-MS/MS combined with high-speed counter-current chromatography (HSCCC) was implemented. (researchsquare.com)
  • Three sesquiterpene lactone compounds, 2 α ,5 α -dihydroxy-11 α H-eudesma-4(15)-en-12,8 β -olide ( 1 ), telekin ( 2 ), oxoeudesm-11(13)-eno-12,8 α -lactone ( 3 ) were obtained. (researchsquare.com)
  • Although plant derivatives have shown promise in reducing enteric methane (CH 4 ) emissions from ruminants in short-term studies, investigation on possible rumen microbial adaptation to these compounds is still limited. (annexpublishers.co)
  • Organochlorine pesticides are very persistent liposoluble compounds with high half-life times in human organism. (scialert.net)
  • The high temperatures of roasting also produce transformation of part of CGA into quinolactones and, along with other compounds, melanoidins. (scielo.br)
  • An analytical technique for resolution of a chemical mixture into its component compounds. (lookformedical.com)
  • In co-operation with the centre of peptide chemistry at the Weizmann Institute of Science, he developed methods of the gas-chromatographic resolution of racemic α-amino acids. (wikipedia.org)
  • carried out in 1966 the first gas-chromatographic enantioseparation of racemic amino acids as N-trifluoroacetyl-O-alkyl derivatives. (wikipedia.org)
  • The advancement of TLC is High-Performance Thin Layer Chromatography (HPTLC) which provide an electronic image of chromatographic fingerprint and densitogram to detect the presence of a marker compound in the plant sample 1 . (ijpsr.com)
  • A specific stability indicating high-performance thin-layer chromatographic method for analysis of rifaximin both as a bulk drug and in formulations was developed and validated. (hindawi.com)
  • However, none of the articles related to the stability indicating high-performance thin-layer chromatographic (HPTLC) method for the determination of rifaximin in pharmaceutical formulation has ever been mentioned in literature up to our knowledge. (hindawi.com)
  • Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. (lookformedical.com)
  • 7 In this article, we present our results on the synthesis, crystal structure and anti-ischaemic activity of new cinnamide derivative of (E)-1-{4-[bis(4-methoxyphenyl)methyl]piperazin-1- yl}-3-(4-chlorophenyl)prop-2- en-1-one (5). (scielo.org.za)
  • We herein report the synthesis of a derivative of the natural compound celastrol linked to the antimalarial drug primaquine through an amide obtained by the activation of the carboxylic acid with HOBt/EDC. (mdpi.com)
  • The synthesis and evaluation of a new detergent that is a zwitterionic derivative of cholic acid is presented. (sigmaaldrich.com)
  • In his study of oil shale deposits, Gil-Av developed complex-forming stationary phases employing silver(I) ions for selective olefin separations by gas chromatography (GC). (wikipedia.org)
  • Derivatives of the benzimidazole lead compound were previously investigated for these purposes [2]. (vanderbilt.edu)
  • A derivative of this benzimidazole compound, ML398, displays promising qualities such as high selectivity and a slightly improved binding affinity. (vanderbilt.edu)
  • Rifaximin, a benzimidazole derivative, is a structural analogue of rifampicin. (hindawi.com)
  • MALDI analysis of proteins after extraction from dissolvable ethylene glycol diacrylate cross-linked polyacrylamide gels. (uni-frankfurt.de)
  • Our polymers with a high electron affinity display long wavelength NIR absorption with air stable electron transport in solution processed organic thin film transistors. (nature.com)
  • In addition, a high electron affinity is also required for ambient stability, as it prevents common redox reactions involving water and oxygen which can occur under device operation, and lead to degradation. (nature.com)
  • Buspirone binds to D3 and D4 receptors with a high affinity [1]. (vanderbilt.edu)
  • The goal of this project is to synthesize a highly selective D4 antagonist with high binding affinity for PET tracing and useful in vivo properties to test in animal models. (vanderbilt.edu)
  • 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)
  • R. Charles, E. Gil-Av: Self-Amplification of Optical Activity by Chromatography on an Achiral Adsorbent, J. Chromatogr. (wikipedia.org)
  • Most importantly, a qualified cancer NIR sensor should have high specificity for cancer-selective detection. (dovepress.com)
  • In the non-fullerene PSCs, medium bandgap polymer donor-low bandgap n-OS acceptor pairs are particular interesting due to their complementary absorption in the visible-near infrared region, providing an effective approch for getting a high J sc . (nature.com)
  • 1 In particular, much attention has been paid to near-infrared (NIR) fluorescence imaging within the wavelength range of 700-900 nm due to its low absorption and autofluorescence from organisms and tissues in the NIR spectral range, rendering minimal background interference, deep tissue penetration, and high sensitivity for cancer imaging. (dovepress.com)
  • 2 , 3 The heart of NIR imaging lies in the development of fulfilling fluorochromes, which must have a high molar absorption coefficient for intense fluorescence, good biocompatibility with low toxicity, and sufficient stability and water solubility in the complex biological environment. (dovepress.com)
  • In order to probe the capability of the photosensitizer for PDT, the singlet oxygen production of both ZnPR-IONP and the free ligand ZnPR-COOH have been quantified by measuring the decay in absorption of the anthracene derivative 9,10-anthracenedipropionic acid (ADPA), showing an important increase on singlet oxygen production when the porphyrin is incorporated onto the IONP (ZnPR-IONP). (docksci.com)
  • A system of Gas Chromatography with an Electron Capture Detector (CG-ECD) was used for the qualitative and quantitative analysis of the samples. (scialert.net)
  • Qualitative analysis of water showed a high level of chloride, calcium, potassium and sodium in TDW and low in FDW of Djamaa region as compared to mineral water. (ajrconline.org)
  • K. Watabe, R. Charles, E. Gil-Av: Temperature Dependent Inversion of Elution Sequence in the Resolution of α-Amino Acid Enantiomers on Chiral Diamide Selectors, Angew. (wikipedia.org)
  • Conjugated polymers have the potential for solution processability, compatibility with flexible substrates, and can be fabricated in large areas at high throughput. (nature.com)
  • Fullerenes and their derivatives are widely used in BHJ OSC devices as the electron acceptor material. (beilstein-journals.org)
  • Using the same technical approach we have measured the decrease in Bohr hydrogen ions in hemoglobin derivatives in which either one or both Bohr groups of the ␣ and ␤ subunits of deoxy hemoglobin and of the deoxy/cyanomet intermediates were chemically modified by carbamoylation (8) and by the NEM 1 reaction of cysteine F␤93 (9). (archive.org)
  • In recent studies, the solar cell devices achieved power conversion efficiency as high as 7.5% for IC 60 BA [5] and 7.4% for IC 70 BA [6] . (beilstein-journals.org)
  • To achieve this purpose, a zinc porphyrin derivative, ZnPR-COOH, has been synthesized, characterized at the molecular level and immobilized onto previously synthesized iron oxide nanoparticles covered with oleylamine. (docksci.com)
  • In this study, we examined the interaction between silica (SiO2) nanoparticles and collagen in its fiber, microfibril, and monomer forms through high-resolution scanning electron microscopy, circular dichroism, Fourier-transform infrared spectroscopy, fluorescence analysis, zeta potential measurements, and turbidity assays. (bvsalud.org)
  • Fe3O4@SiO2 nanoparticles were synthesized through the sol-gel and hydrothermal methods. (bvsalud.org)
  • 9. Derouiche S, Degachi O, Gharbi K. Phytochemistry analysis and modulatory activity of Portulacae oleracea and Aquilaria malaccensis extracts against High-fructose and high-fat diet induced immune cells alteration and heart lipid peroxidation in Rats. (ajrconline.org)
  • These extracts showed a high antioxidant capacity by the method of DPPH, -carotene, and nitric oxide. (bvsalud.org)
  • The title compound (E)-1-{4-[bis(4-methoxyphenyl)methyl]piperazin-1-yl}-3-(4-chloro- phenyl)prop-2-en-1-one (C 28 H 29 ClN 2 O 3 , Mr = 476.98) (5) was synthesized and studied by the single crystal X-ray diffraction method. (scielo.org.za)
  • 13 The title compound (E)-1-{4-[bis(4-methoxyphenyl)methyl]piperazin-1-yl}-3-(4-chlorophenyl)prop-2-en-1-one 5 was obtained as follows:thionylchloride (2mL) and piperadine (1 drop) were added to a stirred solution of (E)-3-(4-chlorophenyl)acrylic acid (4,4 mmol) in dichloromethane (15 mL) at room temperature. (scielo.org.za)
  • Editor's Choice articles are based on recommendations by the scientific editors of MDPI journals from around the world. (mdpi.com)
  • Open access peer-reviewed scientific and medical journals. (dovepress.com)
  • The chemical characterization of oleanolic acid was done by High-Performance Thin Layer Chromatography (HPTLC) in a mixture of toluene: methanol (9:1) as a mobile phase which developed in anisaldehyde sulphuric acid reagent. (ijpsr.com)
  • The HPTLC fingerprint has better resolution and estimation of active constituent in shorter time 2 . (ijpsr.com)
  • The reaction of cinnamic acid chloride with 1-[bis(4-methoxyphenyl)methyl]piperazine in the presence of triethylamine in dichloromethane at room temperature afforded the corresponding new cinnamide derivative with a total yield of 73.5 % ( Scheme 1 ), which was expected to be a potent neuroprotective agent. (scielo.org.za)
  • Journal of Agricultural and Environmental Ethics. (psu.edu)
  • Such studies are difficult because of the high rates of the dissociation and association reactions of the physiological ligand, the com-plexity of the intermediate ligation states Fig. 1 , and the instability of tetrameric hemoglobin. (archive.org)
  • Hence, they are of high interest for supporting bone regeneration and wound healing. (degruyter.com)
  • Find out who is on the editorial and advisory boards for the ChemComm journal. (rsc.org)
  • and are formed at high concentrations within capitate stalked trichomes on the floral tissues of female inflorescences. (frontiersin.org)
  • The RSC's most cited journal, we have been one of the most trusted venues for rapid publication of short communications for more than 50 years. (rsc.org)
  • Furthermore, these collaborative research efforts span the widest possible range in terms of company size, from small-size high-tech companies, over mid-size companies with a strong local base, to large, multinational enterprises. (lu.se)
  • However, the underlying mechanisms and cellular functions triggered by internalized sGAG-derivatives are still not well understood. (degruyter.com)
  • Topical microbicides that have antiviral properties, such as tenofovir gel, may prevent the spread of herpes virus. (lifeextension.com)
  • The fully hydrated form of silica gel has distinct properties and is referred to as SILICIC ACID. (lookformedical.com)
  • Column chromatography (CC) was carried out using silica gel (Si) 60 mesh of 35-60 and 60-120 (E. Merck, Darmstadt, Germany). (hindawi.com)
  • Volker Schurig: On the Centenary of Emanuel Gil-Av, Former Professor of the Weizmann Institute of Science and Pioneer of Enantioselective Chromatography, Isr. (wikipedia.org)
  • Feature papers represent the most advanced research with significant potential for high impact in the field. (mdpi.com)
  • Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. (mdpi.com)