Results 11 to 20 of about 132,397 (310)

Classification of Various Marijuana Varieties by Raman Microscopy and Chemometrics

Toxics, 2022
The Raman analysis of marijuana is challenging because of the sample’s easy photo-degradation caused by the laser intensity. In this study, optimization of collection parameters and laser focusing on marijuana trichome heads allowed collecting Raman ...
Luis Ramos-Guerrero, Gemma Montalvo, Marzia Cosmi, Carmen García-Ruiz, Fernando E. Ortega-Ojeda   +4 more
doaj   +1 more source

A new Raman technique of superior spectral resolution [PDF]

, 1982
Raman-active vibrational modes are coherently excited by the transient stimulated Raman process. A subsequent delayed probe of relatively long duration interacts with the freely relaxing vibrations.
Zinth, Wolfgang, W. Kaiser, Kaiser, Wolfgang, Nuss, M. C., M. C. Nuss, W. Zinth   +5 more
core   +1 more source

Morphology-based automated baseline removal for raman spectra of artistic pigments [PDF]

, 2010
The interpretation of a Raman spectrum is based on the identification of its characteristic molecular bands. However, the assignment of the vibrational modes is often compromised by the presence in the spectrum of an intense fluorescence background that ...
Pérez Pueyo, Rosanna, Soneira Ferrando, M. José, Ruiz Moreno, Sergio, Sergio Ruiz-Moreno, Maria Jose Soneira, Rosanna Perez-Pueyo   +5 more
core   +2 more sources

RAMAN SPECTRA FROM ACETONE [PDF]

Proceedings of the National Academy of Sciences, 1929
Measurements of Raman spectra from acetone have been published in a recent paper [1]. These measurements were so interpreted that out of thirteen modified lines, twelve corresponded to frequencies of observed infra-red absorptions, the thirteenth lying outside the range of the infrared measurements.
R T, Dillon, R G, Dickinson
openaire   +2 more sources

Modulated Raman spectroscopy for enhanced identification of bladder tumor cells in urine samples [PDF]

, 2011
Standard Raman spectroscopy (SRS) is a noninvasive technique that is used in the biomedical field to discriminate between normal and cancer cells.
Herrington, C Simon, Briscoe, Tina, Andrew C. Riches, Sargeant, Harry, Canetta, Elisabetta, Riches, Andrew C., Sam Neilson, Dholakia, Kishan, Carruthers, Antonia Erika, Anna Chiara De Luca, Kishan Dholakia, Herrington, C. Simon, C. Simon Herrington, Elisabetta Canetta, Antonia E. Carruthers, De Luca, Anna Chiara, Carruthers, Antonia E., Neilson, Sam, Michael Mazilu, Harry Sargeant, Mazilu, Michael, Tina Briscoe, Riches, Andrew Clive   +22 more
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Differentiation of Lipsticks by Raman Spectroscopy [PDF]

, 2012
Dispersive Raman spectra have been obtained using a Raman microscope and an excitation wavelength of 632.8 nm from 69 lipsticks of various colours and from a range of manufacturers without any pre-treatment of the samples.
Salahioglu, Fatma, Went, Michael J.
core   +1 more source

A Comparison of Phycocyanins from Three Different Species of Cyanobacteria Employing Resonance-Enhanced Coherent Anti-Stokes Raman Spectroscopy [PDF]

, 1993
Resonance-enhanced coherent anti-Stokes Raman spectra are recorded for monomers and trimers of phycocyanin from three different cyanobacteria: Westiellopsis prolifica, Mastigocladus laminosus and Spirulina platensis.
L. Gottschalk, G. Brehm, Gedeck, P., P. Gedeck, S. Schneider, Scheer, Hugo, Schneider, Siegfried, P. S. Maruthi Sai, H. Scheer, Brehm, G., Gottschalk, Lothar, Maruthi Sai, P. S., Prenzel, C. J., C.‐J. Prenzel   +13 more
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Use of Handheld Raman Spectroscopy for Intraoperative Differentiation of Normal Brain Tissue From Intracranial Neoplasms in Dogs

Frontiers in Veterinary Science, 2022
The aim of this study was to assess feasibility and accuracy of a hand-held, intraoperative Raman spectroscopy device as a neuronavigation aid to accurately detect neoplastic tissue from adjacent normal gray and white matter.
Caitlin E. Doran, Chad B. Frank, Stephanie McGrath, Rebecca A. Packer   +3 more
doaj   +1 more source

Raman spectroscopic evaluation of human serum using metal plate and 785- and 1064-nm excitation lasers.

PLoS ONE, 2019
In this study, we utilized a stainless steel (SUS304) plate for measuring the Raman scattering spectra of body fluid samples. Using this stainless steel plate, we recorded the Raman scattering spectra of 99.5% ethanol and human serum samples by ...
Hiroaki Ito, Naoyuki Uragami, Tomokazu Miyazaki, Noboru Yokoyama, Haruhiro Inoue   +4 more
doaj   +1 more source

Raman Imaging of Plant Cell Walls in Sections of Cucumis sativus

Plants, 2018
Raman microspectra combine information on chemical composition of plant tissues with spatial information. The contributions from the building blocks of the cell walls in the Raman spectra of plant tissues can vary in the microscopic sub-structures of the
Ingrid Zeise, Zsuzsanna Heiner, Sabine Holz, Maike Joester, Carmen Büttner, Janina Kneipp   +5 more
doaj   +1 more source