Results 21 to 30 of about 525,362 (303)

Simultaneous determination of norfloxacin and sulfadiazine by first-derivative spectrophotometry [PDF]

Journal of Chemistry Letters, 2023
In the present study, the development and validation of a UV-Vis spectrophotometry technique are described, applying the first derivative for the simultaneous determination and quantification of norfloxacin (NF) and sulfadiazine (SDZ).
Cecilia Avila, Rosalía Ayala Gómez, María Mazzieri, Graciela Pinto Vitorino   +3 more
doaj   +1 more source

Optimization of limit of detection in Taylor dispersion analysis: Application to the size determination of vaccine antigens

Talanta Open, 2023
The development of a new vaccine requires the precise characterization of all the physicochemical parameters of the vaccine antigens, which are the molecules that induce the immune response.
Camille Malburet, Michel Martin, Laurent Leclercq, Jean-François Cotte, Jérôme Thiebaud, Jean-Philippe Biron, Joseph Chamieh, Hervé Cottet   +7 more
doaj   +1 more source

Linear calibrations in chromatography: the incorrect use of ordinary least squares for determinations at low levels, and the need to redefine the limit of quantification with this regression model.

Journal of Separation Science, 2020
Ordinary least squares is widely applied as the standard regression method for analytical calibrations, and it is usually accepted that this regression method can be used for quantification starting at the limit of quantification.
J. M. Sánchez
semanticscholar   +1 more source

Statement on the risk assessment of maximum residue levels (MRLs) for oxamyl in view of consumer protection

EFSA Journal, 2023
In accordance with Article 43 of Regulation (EC) No 396/2005, the European Commission requested EFSA to perform a risk assessment of the existing maximum residues levels (MRLs) for oxamyl considering the new toxicological reference values.
European Food Safety Authority (EFSA)
doaj   +1 more source

The quantification of midwifery research: Limiting midwifery knowledge

Birth, 2022
AbstractAs two academics researching in the area of maternal health, we are increasingly concerned with what we see as a positivist turn in midwifery research. In this paper, we examine this idea of the quantification of midwifery research, using as an example the current esteem given to the systematic literature review, and its creep into other ...
Elizabeth Newnham, Barbara Katz Rothman
openaire   +2 more sources

Species Quantification in Complex Herbal Formulas—Vector Control Quantitative Analysis as a New Method

Frontiers in Pharmacology, 2020
Product mislabeling and/or species fraud in Traditional Chinese Medicine (TCM) not only decrease TCM quality, but also pose a potential health issue to the end user.
Bo Zhao, Bo Zhao, Chao Xiong, Chao Xiong, Jingjian Li, Deng Zhang, Yancai Shi, Wei Sun, Xiaoqun Duan   +8 more
doaj   +1 more source

Theoretical limitations of quantification for noncompetitive sandwich immunoassays [PDF]

Analytical and Bioanalytical Chemistry, 2015
Immunoassays exploit the highly selective interaction between antibodies and antigens to provide a vital method for biomolecule detection at low concentrations. Developers and practitioners of immunoassays have long known that non-specific binding often restricts immunoassay limits of quantification (LOQs). Aside from non-specific binding, most efforts
Christine F, Woolley, Mark A, Hayes, Prasun, Mahanti, S, Douglass Gilman, Tom, Taylor   +4 more
openaire   +2 more sources

Shot noise sets the limit of quantification in electrochemical measurements

, 2020
Detection of single molecules, particles, and rapid redox events is a challenge of electrochemical investigations and requires either an amplification strategy or significant averaging in order to boost the electrochemical current above the noise level ...
Rui Gao, M. Edwards, J. Harris, H. White
semanticscholar   +1 more source

A Highly Sensitive CRISPR‐Empowered Surface Plasmon Resonance Sensor for Diagnosis of Inherited Diseases with Femtomolar‐Level Real‐Time Quantification

Advancement of science, 2022
The clustered regularly interspaced short palindromic repeats (CRISPR) molecular system has emerged as a promising technology for the detection of nucleic acids.
Fei Zheng, Zhi Chen, Jingfeng Li, Ruige Wu, Bin Zhang, Guohui Nie, Zhongjian Xie, Han Zhang   +7 more
semanticscholar   +1 more source

Measurement of methionine level with the LC-ESI-MS/MS method in schizophrenic patients [PDF]

The Ukrainian Biochemical Journal, 2016
The purpose of this study was to evaluate plasma methionine levels by using liquid chromatography electrospray ionization-tandem mass spectroscopy (LC-ESI-MS/MS) in schizophrenic patients.
S. Kulaksizoglu, B. Kulaksizoglu, H. Y. Ellidag, E. Eren, N. Yilmaz, A. Baykal   +5 more
doaj   +1 more source