Browsing QFA_Articles by Title
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Investigating the presence of pesticide transformation products in water by using liquid chromatography-mass spectrometry with different mass analyzers
John Wiley & Sons (2008)Many pesticide transformation products (TPs) can reach environmental waters as a consequence of their normally having a higher polarity than their parent pesticides. This makes the development of analytical methodology ... -
Investigation of electronic structure, morphological features, optical, colorimetric, and supercapacitor electrode properties of CoWO4 crystals
Elsevier B.V. (2022-01-12)Cobalt tungstate (CoWO4) crystals were synthesized by the co-precipitation (CP) and polymeric precursor (PP) methods with posterior heat treatment at 800 °C for 4 h. The electronic structure, morphological features, optical, ... -
Investigation of pesticide metabolites in food and water by LC-TOF-MS
Elsevier (2008)We illustrate the potential of liquid chromatography with (quadrupole) time-of-flight mass spectrometry [LC-(Q)TOF-MS] in investigating the presence of pesticide metabolites in food and water samples. The higher polarity ... -
Investigation of pharmaceuticals and their metabolites in Brazilian hospital wastewater by LC-QTOF MS screening combined with a preliminary exposure and in silico risk assessment
Elsevier (2020)This work evaluates the occurrence of pharmaceuticals, with special emphasis on their metabolites, in raw hospital wastewater (HWW) using wide-scope screening based on liquid chromatography coupled to high resolution mass ... -
Investigation of pharmaceuticals in a conventional wastewater treatment plant: Removal efficiency, seasonal variation and impact of a nearby hospital
Elsevier (2021-04-23)Discharges from the wastewater treatment plants (WWTPs) are among the main sources of contamination to receiving surface water, therefore the quality of treated wastewater needs to be properly monitored. However, not only ... -
Investigation of pharmaceuticals in processed animal by-products by liquid chromatography coupled to high-resolution mass spectrometry
Elsevier (2016-07)There is an on-going trend for developing more sustainable salmon feed in which traditionally applied marine feed ingredients are replaced with alternatives. Processed animal products (PAPs) have been re-authorized as novel ... -
Investigation of the Hydroxylation Mechanism of Noncoupled Copper Oxygenases by Ab Initio Molecular Dynamics Simulations
Wiley (2013-11-20)In Nature, the family of copper monooxygenases comprised of peptidylglycine α-hydroxylating monooxygenase (PHM), dopamine β-monooxygenase (DβM), and tyramine β-monooxygenase (TβM) is known to perform dioxygen-dependent ... -
Ionic liquids in separation techniques
Elsevier (2008)The growing interest in ionic liquids (ILs) has resulted in an exponentially increasing production of analytical applications. The potential of ILs in chemistry is related to their unique properties as non-molecular solvents: ... -
Is it really necessary to validate an analytical method or not? That is the question
Elsevier (2012)Method validation is an important requirement in the practice of chemical analysis. However, awareness of its importance, why it should be done and when, and exactly what needs to be done, seems to be poor amongst analytical ... -
Is Promiscuous CALB a Good Scaffold for Designing New Epoxidases?
MDPI (2015)Candida Antarctica lipase B (CALB) is a well-known enzyme, especially because of its promiscuous activity. Due to its properties, CALB was widely used as a benchmark for designing new catalysts for important organic ... -
Isolation of a New Cs-Symmetrized Mo3(μ3-S)(μ-S)(μ-S2)2 Structural Type Through Complementary Association with a Cubane-Type Mo3NiS4 Cluster
Wiley (2012)A new cluster of formula {[Mo3(μ3-S)(μ-S)(μ-S2)2(dtp)3(μ-OAc)][Mo3NiS4(dtp)3(μ-OAc)(CH3CN)]} (1; dtp = diethyl dithiophosphate; OAc = acetate) comprising the novel Cs-symmetrized Mo3(μ3-S)(μ-S)(μ-S2)2 structural type ... -
Isolation, X-ray Crystal Structure and Theoretical Calculations of the New Compound 8-Epicordatin and Identification of others Terpenes and Steroids from the Bark and Leaves of Croton palanostigma Klotzsch
Sociedade Brasileira de Química (2010)Phytochemical studies of the bark and leaves of Croton palanostigma Klotzsch (Euphorbiaceae) led to the isolation of a new clerodane diterpene, 8-epicordatin (2), in addition to 12-oxohardwickiic acid methyl ester (3), ... -
Isospin phases of vertically coupled double quantum rings under the influence
American Physical Society (2008)Vertically coupled double quantum rings submitted to a perpendicular magnetic field B are addressed within the local spin-density-functional theory. We describe the structure of quantum ring molecules containing up to 40 ... -
Isostructural Second-Order Phase Transition of β-Bi2O3 at High Pressures: An Experimental and Theoretical Study
American Chemical Society (2014-09)We report a joint experimental and theoretical study of the structural and vibrational properties of synthetic sphaerobismoite (β-Bi2O3) at high pressures in which room-temperature angle-dispersive X-ray diffraction (XRD) ... -
Isotope Substitution of Promiscuous Alcohol Dehydrogenase Reveals the Origin of Substrate Preference in the Transition State
Wiley (2018-03-12)The origin of substrate preference in promiscuous enzymes was investigated by enzyme isotope labelling of the alcohol dehydrogenase from Geobacillus stearothermophilus (BsADH). At physiological temperature, protein dynamic ... -
Joint Theoretical and Experimental Study on the La Doping Process in In2O3: Phase Transition and Electrocatalytic Activity
American Chemical Society (2019-08)In2O3 and La3+-doped In2O3 nanostructures were synthesized through a facile and fast chemical route based on the microwave-assisted hydrothermal method combined with rapid thermal treatment in a microwave oven. The presence ... -
Joint Use of Bonding Evolution Theory and QM/MM Hybrid Method for Understanding the Hydrogen Abstraction Mechanism via Cytochrome P450 Aromatase
Copyright © 2015 American Chemical Society (2015-02)Bonding evolution theory (BET), as a combination of the electron localization function (ELF) and Thom’s catastrophe theory (CT), has been coupled with quantum mechanics/molecular mechanics (QM/MM) method in order to study ... -
Kinetics Aspects of the Reversible Assembly of Copper in Heterometallic Mo3CuS4 Clusters with 4,4′-Di-tert-butyl-2,2′-bipyridine
American Chemical Society (2016)Treatment of the triangular [Mo3S4Cl3(dbbpy)3]Cl cluster ([1]Cl) with CuCl produces a novel tetrametallic cuboidal cluster [Mo3(CuCl)S4Cl3(dbbpy)3][CuCl2] ([2][CuCl2]), whose crystal structure was determined by X-ray ... -
Large hole spin anticrossings in InAs/GaAs double quantum dots
AIP Publishing (2013-09-23)We show that hole states in InAs/GaAs double quantum dots can exhibit spin anticrossings of up to 1 meV, according to simulations with a three dimensional Burt-Foreman Hamiltonian including strain and piezoelectric fields. ... -
Laser and electron beam-induced formation of Ag/Cr structures on Ag2CrO4
Royal Society of Chemistry (2019)The interactions of silver chromate (Ag2CrO4) with a femtosecond (fs) laser and electron beam irradiations were investigated. For the first time, the growth and coalescence of metallic Ag nanoparticles (NPs) on an Ag2CrO4 ...