Results 121 to 130 of about 60,124 (297)

Data Analysis and Chemometrics in X-Ray Fluorescence and Applications

open access: yes
Proper characterization of some environmental, agronomic and industrial samples is still an analytical challenge. New pollutants and sample matrices have put pressure in analytical laboratories for the development of reliable methods that may be used in ...
Melquiades, F. L.   +5 more
core   +1 more source

Determination of mechanical properties of historical paper based on NIR spectroscopy and chemometrics - a new instrument [PDF]

open access: yes, 2008
Due to sampling restrictions in the analysis of cultural heritage materials, non-destructive approaches are intensively sought for. While NIR spectrometry has rarely been used for this purpose due to the complexity of the spectra, chemometric methods can
Kolar, J.   +9 more
core   +1 more source

Geometrical isomerization of hydroxycinnamic acid under UV‐light: Structural plasticity as a driver of metabolite complexity

open access: yesPhotochemistry and Photobiology, EarlyView.
UV irradiation drives metabolite complexity through photoisomerization of hydroxycinnamic acid‐containing compounds in plants. The olefin functional group of hydroxycinnamic acid enables structural plasticity through trans/cis isomerization. Multiple chromophores within a molecule can amplify UV‐induced transformations.
Mailane Rose Sekgobela   +5 more
wiley   +1 more source

Electroreductive alkylations of (hetero)arenes with carboxylic acids

open access: yesNature Communications
Carboxylic acids are widely available and generally inexpensive from abundant biomass feedstocks, and they are suitable and generic coupling partners in synthetic chemistry.
Bing Wang   +3 more
doaj   +1 more source

Metabolomic Mapping of Greek Olive Leaves by Untargeted NMR‐Based Profiling and LC–HRMS Dereplication

open access: yesAnalytical Science Advances, Volume 7, Issue 2, December 2026.
ABSTRACT Olive tree leaves are phytochemically rich yet insufficiently valorised in terms of systematic cultivar‐based characterisation and exploitation, and are an abundant olive industry side‐product. This study represents the first large‐scale metabolome mapping based on 340 leaf extracts from five major Greek cultivars (Amfissis, Koroneiki, Manaki,
Mariacaterina Lianza   +5 more
wiley   +1 more source

Chemometrics

open access: yesIEEJ Transactions on Sensors and Micromachines, 1997
Tatsubayashi, Kenichi, Endo, Naoko
  +9 more sources

An Introduction to the 'Special Volume Spectroscopy and Chemometrics in R' [PDF]

open access: yes
This special volume collates ten issues under the rubric "Spectroscopy and Chemometrics in R". In so doing, it provides an overview of the breadth, depth and state of the art of R-based software projects for spectroscopy and chemometrics applications ...
Ivo H. M. van Stokkum   +1 more
core  

Non‐Destructive Analysis of Phenolic and Flavonoid Contents in Medicinal Plant Powders Using Hyperspectral Imaging and Variable Selection

open access: yesAnalytical Science Advances, Volume 7, Issue 2, December 2026.
ABSTRACT Phenolic and flavonoid contents in medicinal plants are essential to their growth and development and provide numerous health benefits, yet their quantification using traditional wet chemistry is labor‐intensive and time‐consuming. This study utilized the combination of two benchtop hyperspectral imaging (HSI) systems, namely short‐wave ...
Rahul Joshi   +9 more
wiley   +1 more source

A Plasma Biochemical Analysis of Acute Lead Poisoning in a Rat Model by Chemometrics-Based Fourier Transform Infrared Spectroscopy: An Exploratory Study

open access: yesFrontiers in Chemistry, 2018
In this work, we explored to use chemometrics-based Fourier transform infrared (FTIR) spectroscopy to investigate the plasma biochemical changes due to acute lead poisoning (ALP) in a rat model.
Wenli Tian   +4 more
doaj   +1 more source

N-Alkane profiles of lard and vegetable oils, and their chemometrics differentiation

open access: yes, 2023
This research aims to examine fat from various vegetable oils using n-alkane profiles, as well as chemometrics and machine learning. Unsaponifiable vegetable oils (coconut, peanut, palm and soybean oils) were separated and analysed using gas ...
Yusof, Mohd Termizi   +9 more
core  

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