Results 11 to 20 of about 57,386 (255)

CARTESIAN AXIS AND PLANE CONVENTIONS IN Cnv SYMMETRY GROUPS

open access: yesQuĂ­mica Nova, 2021
In this work, we call the attention to the ambiguity found in the literature when labeling vibrations and molecular orbitals as B1 and B2 for molecules belonging to the C2v point group as, for example, the water molecule.
Lucas A. L. Dias, Roberto B. Faria
doaj   +1 more source

Raman and fourier transform infrared spectroscopy techniques for detection of coronavirus (COVID-19): a mini review

open access: yesFrontiers in Chemistry, 2023
Coronavirus pandemic has been a huge jeopardy to human health in various systems since it outbroke, early detection and prevention of further escalation has become a priority.
Qiuqi Zhang   +4 more
doaj   +1 more source

Porcelain shards from Portuguese wrecks: Raman spectroscopic analysis of marine archaeological ceramics

open access: yesHeritage Science, 2017
Raman spectroscopic analysis of shards recovered from two Portuguese shipwrecks, the Santo Espirito (1608) and the Santa Maria Madre de Deus (1643), believed to be carrying porcelains of the Ming period have revealed some interesting and novel results ...
Elizabeth A. Carter   +3 more
doaj   +1 more source

Vibrational spectroscopy of stichtite

open access: yesSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004
Raman spectroscopy complimented with infrared spectroscopy has been used to study the mineral stitchtite, a hydrotalcite of formula Mg6Cr2(CO3)(OH)16.4H2O. Two bands are observed at 1087 and 1067 cm(-1) with an intensity ratio of approximately 2.5/1 and are attributed to the symmetric stretching vibrations of the carbonate anion. The observation of two
Frost, Raymond, Erickson, Kristy
openaire   +3 more sources

An FT-Raman, FT-IR, and Quantum Chemical Investigation of Stanozolol and Oxandrolone

open access: yesBiosensors, 2017
We have studied the Fourier Transform Infrared (FT-IR) and the Fourier transform Raman (FT-Raman) spectra of stanozolol and oxandrolone, and we have performed quantum chemical calculations based on the density functional theory (DFT) with a B3LYP/6-31G ...
Tibebe Lemma   +3 more
doaj   +1 more source

Biomedical Vibrational Spectroscopy in the Era of Artificial Intelligence

open access: yesMolecules, 2021
Biomedical vibrational spectroscopy has come of age. The past twenty years have brought many advancements and new developments and now its practitioners face a new challenge: artificial intelligence.
Henry Horst Mantsch
doaj   +1 more source

Human and Bovine Dentin Composition and Its Hybridization Mechanism Assessed by FT-Raman Spectroscopy

open access: yesJournal of Spectroscopy, 2013
FT-Raman spectroscopy was used to study the human and bovine dentin and their interactions with adhesive systems. Ten human (H) molars and ten bovine (B) teeth were prepared exposing the dentin and then each specimen was divided into two parts.
L. E. S. Soares   +2 more
doaj   +1 more source

Time-Resolved Chiral Vibrational Spectroscopy

open access: yesCHIMIA, 2009
Advances in infrared laser technology and detection sensitivity have made time-resolved chiral vibrational spectroscopy experimentally feasible. Here we describe our recent efforts in detecting, for the first time, transient vibrational circular
Jan Helbing, Mathias Bonmarin
doaj   +1 more source

An Overview of the Successful Application of Vibrational Spectroscopy Techniques to Quantify Nutraceuticals in Fruits and Plants

open access: yesFoods, 2022
Vibrational spectroscopy techniques are the most used techniques in the routine analysis of foods. This technique is widely utilised to measure and monitor the proximate chemical composition (e.g., protein, dry matter, fat and fibre) in an array of ...
Daniel Cozzolino
doaj   +1 more source

Vibrational Spectroscopy: Disease Diagnostics and Beyond [PDF]

open access: yes, 2013
This chapter outlines some developments in the applications of vibrational spectroscopy for disease diagnostics and demonstrates how the applications of the spectroscopic techniques can be extended to the analysis and evaluation of disease aetiology and the mechanisms of interaction with and the cellular and subcellular responses to, for example ...
Byrne, Hugh   +6 more
openaire   +2 more sources

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