Results 21 to 30 of about 19,946 (260)

Optical Nerve Detection by Diffuse Reflectance Spectroscopy for Feedback Controlled Oral and Maxillofacial Laser Surgery

Journal of Translational Medicine, 2011
Background Laser surgery lacks haptic feedback, which is accompanied by the risk of iatrogenic nerve damage. It was the aim of this study to investigate diffuse reflectance spectroscopy for tissue differentiation as the base of a feedback control system ...
Douplik Alexandre, Tangermann-Gerk Katja, Adler Werner, Zam Azhar, Stelzle Florian, Nkenke Emeka, Schmidt Michael   +6 more
doaj   +1 more source

Analytical model for diffuse reflectance in single fiber reflectance spectroscopy

Optics Letters, 2020
Cancer progression leads to changing scattering properties of affected tissues. Single fiber reflectance (SFR) spectroscopy detects these changes at small spatial scales, making it a promising tool for early in situ detection. Despite its simplicity and versatility, SFR signal modeling is hugely complicated so that, presently, only approximate models ...
Faber, Dirk J., Post, Anouk L., Sterenborg, Henricus J. C. M., van Leeuwen, Ton G.   +3 more
openaire   +3 more sources

Determination of ambroxol in syrups using diffuse reflectance spectroscopy

Química Nova, 2009
This paper reports an analytical method for the determination of ambroxol in micellar medium by spot test-diffuse reflectance spectroscopy. The reflectance measurements were performed analyzing the colored compound (λ= 520 nm) produced from the ...
José L. Rufino, Joel M. Santos, Mayra A. Rodrigues, Helena R. Pezza, Leonardo Pezza   +4 more
doaj   +1 more source

Effect of the Fuels Glycine, Urea and Citric Acid on Synthesis of the Ceramic Pigment ZnCr2O4 by Solution Combustion [PDF]

Materials Research, 2015
In this study, ceramic nanopigment ZnCr2O4was prepared by solution combustion using glycine, urea and citric acid as fuels. The objective is to study the influence of fuel on the morphology and the diffuse reflectance spectrum.
Edgar Andrés Chavarriaga Miranda, Juan Fernando Montoya Carvajal, Oscar Jaime Restrepo Baena   +2 more
doaj   +1 more source

Near-Infrared Spectroscopy for Growth Estimation of Spirulina platensis Cultures

Methods and Protocols
The present study proposes the use of Near-Infrared (NIR) spectroscopy as a rapid method for estimating the growth of Spirulina platensis cultures, avoiding any sample manipulation or pretreatment. NIR spectroscopy in diffuse reflectance mode was used on
Lamprini Malletzidou, Eleni Kyratzopoulou, Nikoletta Kyzaki, Evangelos Nerantzis, Nikolaos A. Kazakis   +4 more
doaj   +1 more source

Assessing the amount of the anatase and rutile phases of TiO2 by optical reflectance measurements

Results in Physics, 2021
The anatase (A) and rutile (R) phases of a series of titanium dioxide (TiO2) samples were investigated by optical diffuse reflectance spectroscopy. The samples consisted of commercial A and R high-purity TiO2 powders mixed together according to the Rmass/
A.R. Zanatta
doaj   +1 more source

Determination of Copper(II) Ions by Diffuse Reflectance Spectroscopy Method

Тонкие химические технологии, 2019
A method for copper(II) determination based on copper(II) ions interaction with the organic reagent picramine-ε, concentrating the formed complex on a solid-phase matrix and recording diffuse reflectance spectroscopy spectra by a portable combined LED ...
I. I. Kuzmin, T. Kh. Chyong, Ya. I. Simakina, A. V. Mikhailova, Yu. I. Fabelinsky   +4 more
doaj   +1 more source

Artificial neural networks based estimation of optical parameters by diffuse reflectance imaging under in vitro conditions [PDF]

Journal of Innovative Optical Health Sciences, 2017
Optical parameters (properties) of tissue-mimicking phantoms are determined through noninvasive optical imaging. Objective of this study is to decompose obtained diffuse reflectance into these optical properties such as absorption and scattering ...
Mahmut Ozan Gökkan, Mehmet Engin
doaj   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

FEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace, Alyssa Borges, Charles Arnaud, Tove Karlsson, Nina K. Bröker, Stefanie Barbirz, Marta Bally   +6 more
wiley   +1 more source

Light distribution modulated diffuse reflectance spectroscopy

Biomedical Optics Express, 2016
Typically, a diffuse reflectance spectroscopy (DRS) system employing a continuous wave light source would need to acquire diffuse reflectances measured at multiple source-detector separations for determining the absorption and reduced scattering coefficients of turbid samples.
Pin-Yuan, Huang, Chun-Yu, Chien, Chia-Rong, Sheu, Yu-Wen, Chen, Sheng-Hao, Tseng   +4 more
openaire   +2 more sources