نتایج جستجو برای: near infrared

تعداد نتایج: 330839  

Journal: :Investigative ophthalmology & visual science 2006
Andreas W A Weinberger Alexandra Lappas Thomas Kirschkamp Babac A E Mazinani Julia K Huth Babak Mohammadi Peter Walter

PURPOSE To analyze the occurrence of near infrared (NIR) fluorescence in relation to NIR reflectance, blue-light-excited autofluorescence, angiograms, and funduscopy. METHODS Observational consecutive case series in patients with macular diseases. Imaging was performed with a confocal scanning laser ophthalmoscope for NIR reflectance, blue-light-excited autofluorescence, NIR fluorescence, and...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
saeed masoum ali reza alishahi hamid farahmand maryam shekarchi nuria prieto

the potential of near infrared reflectance spectroscopy (nirs) as a fast method to predict the crude protein (cp) and moisture (m) content in fishmeal by scanning spectra between 1000 and 2500 nm using multivariate regression technique based on partial least squares (pls) was evaluated. the coefficient of determination in calibration (r2c) and standard error of calibration (sec) were 0.95 and 1...

1998
A. Schröder

Roughly 25% of the optical extragalactic sky is obscured by the dust and stars of our Milky Way. Dynamically important structures might still lie hidden in this zone. Various surveys are presently being employed to uncover the galaxy distribution in the Zone of Avoidance (ZOA) but all suffer from (different) limitations and selection effects. We illustrate the promise of using a multi-wavelengt...

امام, یحیی, بذرافشان, محسن, فلاح شمسی, سید رشید,

Remote sensing technology is widely used in environmental and agricultural research, and nowadays it has become a valuable and reliable source of information for the management of crop production and assessment of global supply and demands for these products. The objective of this study was to investigate the feasibility of using MODIS data and vegetation indices based on sugar beet growth moni...

2010
Sukneet Basuta Doyle

Measuring brain activity is at task generally left for EEG or fMRI. However, there is a lesser known imaging technique known as near infrared spectrophotometry, in which near infrared light is shown into the patients head to measure changes in oxygenation that directly relate to brain activity. This paper describes a low-cost, wireless, portable near infrared spectrophotometry system that is ab...

2014
Rubén Usamentiaga Pablo Venegas Jon Guerediaga Laura Vega Julio Molleda Francisco G. Bulnes

The intensity of the infrared radiation emitted by objects is mainly a function of their temperature. In infrared thermography, this feature is used for multiple purposes: as a health indicator in medical applications, as a sign of malfunction in mechanical and electrical maintenance or as an indicator of heat loss in buildings. This paper presents a review of infrared thermography especially f...

Journal: :Clinical chemistry 1996
P Franck J L Sallerin H Schroeder M A Gelot P Nabet

Fecal lipid content is usually determined by titrimetric or gravimetric methods, but these methods are time consuming and involve dangerous solvents. We have developed a new method of measuring fecal lipids by Fourier transform infrared spectrometry (FTIR) with an attenuated total reflectance accessory that is fast and requires no solvents. The spectra of stools from 4000 to 750 cm-1 were analy...

Journal: :Chemical communications 2015
T-A Meier R J Beulig E Klinge M Fuss S Ohla D Belder

Conducting organic syntheses in microfluidic chips allows studying and optimising chemical reactions at minimal time-scales and resource consumption. Herein, we describe a multi-channel microdroplet chip, which allows fast and directed dispensing of reactants into individual droplets in a segmented flow. This gives access to study the reaction progress in situ via surface-enhanced Raman spectro...

2018
Megumi Kobayashi Viola Macchi Cassia So Kanazawa Masami K. Yamaguchi Ryusuke Kakigi

Recent data showed that, in Caucasian infants, perceptual narrowing occurs for own-race adult faces between 3 and 9 months of age, possibly as a consequence of the extensive amount of social and perceptual experience accumulated with caregivers and/or other adult individuals of the same race of the caregiver. The neural correlates of this developmental process remain unexplored, and it is curre...

Journal: :Analytica chimica acta 2007
Roberto Kawakami Harrop Galvão Heronides Adonias Dantas Filho Marcelo Nascimento Martins Mário César Ugulino Araújo Celio Pasquini

This paper proposes a novel wavelet denoising method, which exploits the statistics of individual scans acquired in the course of a coaveraging process. The proposed method consists of shrinking the wavelet coefficients of the noisy signal by a factor that minimizes the expected square error with respect to the true signal. Since the true signal is not known, a sub-optimal estimate of the shrin...

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