Results 81 to 90 of about 9,700 (199)

THREE-WAY DATA ANALYSIS OF COPPER-PARACETAMOL COMPLEX FORMATION FOR THE QUANTIFICATION OF PARACETAMOL IN PHARMACEUTICAL MATRICES

Studia Universitatis Babes-Bolyai Chemia
We present a chemometric strategy to study complex formation reactions using parallel factor analysis (PARAFAC) of three-way spectral data.UV spectra of PAR, CuSO4, and their complex were recorded at five different pH levels.
İbrahim TEĞİN, Gurbet CANPOLAT, Zehra Ceren ERTEKİN, Nihat GÜÇLÜ, Erdal DİNÇ   +4 more
doaj   +1 more source

A Comparative Study of the Application of Fluorescence Excitation-Emission Matrices Combined with Parallel Factor Analysis and Nonnegative Matrix Factorization in the Analysis of Zn Complexation by Humic Acids

Sensors, 2016
The main aim of this study was the application of excitation-emission fluorescence matrices (EEMs) combined with two decomposition methods: parallel factor analysis (PARAFAC) and nonnegative matrix factorization (NMF) to study the interaction mechanisms ...
Patrycja Boguta, Piotr M. Pieczywek, Zofia Sokołowska   +2 more
doaj   +1 more source

Reversing Lanmodulin's Metal‐Binding Sequence in Short Peptides Surprisingly Increases the Lanthanide Affinity

Angewandte Chemie, Volume 137, Issue 46, November 10, 2025.
Accidentally reversing the lanthanide‐binding sequences of lanmodulin‐inspired short peptides lead to the serendipitous discovery of a set of peptides with a one order of magnitude higher lanthanide‐binding affinity than the uncapped peptides synthesised in the correct direction.
Sophie M. Gutenthaler‐Tietze, Jerome Kretzschmar, Satoru Tsushima, Robin Steudtner, Björn Drobot, Lena J. Daumann   +5 more
wiley   +1 more source

Seasonal hydrology and permafrost disturbance impacts on dissolved organic matter composition in High Arctic headwater catchments

Arctic Science, 2017
Arctic landscapes are experiencing intense warming and modification of precipitation regimes with climate change. Permafrost disturbances and climate change impacts on hydrology of Arctic watersheds are likely to modify the quantity and composition of ...
J. Fouché, M. J. Lafrenière, K. Rutherford, S. Lamoureux   +3 more
doaj   +1 more source

Three-Mode Factor Analysis by Means of Candecomp/Parafac

Psychometrika, 2014
A three-mode covariance matrix contains covariances of N observations (e.g., subject scores) on J variables for K different occasions or conditions. We model such an JK×JK covariance matrix as the sum of a (common) covariance matrix having Candecomp/Parafac form, and a diagonal matrix of unique variances.
Stegeman, Alwin, Lam, Tam T T
openaire   +4 more sources

Determination of carbendazim residues in various vegetable oils based on three-dimensional fluorescence spectroscopy

Shipin yu jixie
ObjectiveTo develop a rapid and accurate method for the determination of carbendazim residues in vegetable oils.MethodsThree-dimensional fluorescence spectroscopy combined with chemometrics was used for the quantitative analysis of carbendazim residues ...
XIAO Jian, XIA Alin, HUANG Wei
doaj   +1 more source

Joint 2-D DOA and Doppler Estimation for L-Shaped Array via Dual PARAFAC With Triple Matching Implementation

IEEE Access, 2019
A dual parallel factor (PARAFAC)-based approach to jointly estimating the two-dimensional direction of arrival (2-D DOA) and Doppler is proposed in this paper, where an L-shaped array consisting of acoustic vector-sensor is used.
Riheng Wu, Le Xu, Zhenhai Zhang, Yangyang Dong   +3 more
doaj   +1 more source

Insight into the dynamics of dissolved organic matter components under latitude change perturbation

Ecotoxicology and Environmental Safety
Dissolved organic matter (DOM) which can help the transportation of nutrients and pollutants plays essential role in the aquatic ecosystems. However, the dynamics of individual DOM component under the change of latitude have not been elucidated to date ...
Liming Jia, Qi Yang, Hongyang Cui
doaj   +1 more source

Supercritical Fluid Chromatography of Drugs: Parallel Factor Analysis for Column Testing in a Wide Range of Operational Conditions

Journal of Analytical Methods in Chemistry, 2017
Retention mechanisms involved in supercritical fluid chromatography (SFC) are influenced by interdependent parameters (temperature, pressure, chemistry of the mobile phase, and nature of the stationary phase), a complexity which makes the selection of a ...
Ramia Z. Al Bakain, Yahya Al-Degs, Bertyl Andri, Didier Thiébaut, Jérôme Vial, Isabelle Rivals   +5 more
doaj   +1 more source

A Novel PARAFAC Model for Processing the Nested Vector-Sensor Array

Sensors, 2018
In this paper, a novel parallel factor (PARAFAC) model for processing the nested vector-sensor array is proposed. It is first shown that a nested vector-sensor array can be divided into multiple nested scalar-sensor subarrays.
Wei Rao, Dan Li, Jian Qiu Zhang
doaj   +1 more source