Results 111 to 120 of about 56,277 (295)
Química Nova, 2011 Analysis of seven pesticides in sediments was successfully achieved using comprehensive two-dimensional gas chromatography with micro-electron capture detection, as it provided higher sensitivity and less matrix interference.
Juliana Macedo da Silva +2 more
doaj +1 more source
ELECTROPHORESIS, EarlyView.Human serum albumin‐based high‐performance liquid chromatography and cyclodextrin‐based capillary electrokinetic chromatography were used for the chiral separation of azoles. Although only two of the five tested azoles could be enantioseparated by liquid chromatography, all of them were separated by capillary electrokinetic chromatography using single ...
Sarah Moreau +3 more
wiley +1 more source
Detection and Quantification Challenges in Microplastics Research: A Statistical Overview
MicroplasticsDetection and quantification of microplastics are undermined by the absence of appropriate methods in some contexts—such as a statistically principled LOD for particle-count data—but more pervasively by the uncritical application of ostensibly simple ...
Fabio D’Ottaviano, Kyle Hart
doaj +1 more source
Derivative spectrophotometric method for determination of acyclovir in polymeric nanoparticles
Química Nova, 2012 A derivative spectrophotometric method was validated for quantification of acyclovir in poly (n-butylcyanoacrylate) (PBCA) nanoparticles. Specificity, linearity, precision, accuracy, recovery, detection (LOD) and quantification (LOQ) limits were ...
Guilherme Diniz Tavares +6 more
doaj +1 more source
Environmental Progress &Sustainable Energy, EarlyView.Abstract This study evaluates the potential of a new organic fertilizer derived from porcine intestinal mucosa (designated BHE), a by‐product of the heparin extraction process, as a sustainable nitrogen (N) source for agriculture. The work was conducted in two stages: (i) chemical and spectroscopic characterization of BHE compared with poultry litter ...
Aline Zanquetti +3 more
wiley +1 more source
Intentional Learning Theory: Validating Its Measurement
SAGE OpenThe purpose of this article is to describe and analyze the psychometric properties of the Learning Orientation Questionnaire (LOQ), which have not been previously published.
Sarah Mollman +2 more
doaj +1 more source
Química Nova, 2012 This paper describes selective molecularly imprinted solid-phase extraction of ttMA from urine samples followed by derivatization and analysis by gas chromatography/mass spectrometry (GC/MS). The analytical calibration curve ranged from 0.3 to 7.0 mg L-1
Lidiane Silva Franqui +3 more
doaj +1 more source
Food Chemistry International, EarlyView.Sanguinarine, a toxic alkaloid present in argemone, can lead to epidemic dropsy or chronic diseases through DNA intercalation and immune system suppression. Regulatory efforts face challenges due to economic motivations for adulteration as well as technical, social, and infrastructure barriers.
Gururaj Pejavara Narayana +4 more
wiley +1 more source
Food Chemistry International, EarlyView.ABSTRACT Rice (Oryza sativa L.) is a vital staple crop for nearly half the world's population. This study investigates the levels of aflatoxins (AFB1, AFB2, AFG1, and AFG2) and selected heavy metals (Cd, Pb, and Cr) and essential elements (Mn, Fe, Mg, Cu, and Zn) in rice varieties cultivated in Fogera, Amhara Region, Ethiopia.
Melese Tilahun +3 more
wiley +1 more source
Q-LOQ: A Unified Approach to AI Fraud Detection and Post-Quantum Consumer Security
Presents Q-LOQ, a unified platform architecture addressing both the AI fraud crisis and the quantum security transition. Analyzes the convergent threat landscape of deepfake video, voice cloning, AI phishing, and synthetic identity fraud alongside the quantum computing threat.
Moosbrugger, Michael V. +1 more
openaire +3 more sources