نتایج جستجو برای: iinfrared reflectance spectroscopy nirs

تعداد نتایج: 187969  

2003
Grady L. Miller

Application of nutrients to correct nutrient deficiencies in turfgrasses are often based on tissue analysis. Previous research has indicated that near infrared reflectance spectroscopy (NIRS) may be useful in tissue nutrient concentration determination since it requires minimum sample preparation and has been a reliable predictor of N concentration. The objective of this study was to evaluate t...

2014
María-José De la Haba Mar Arias Pilar Ramírez María-Isabel López María-Teresa Sánchez

This study assessed the potential of near infrared (NIR) spectroscopy as a non-destructive method for characterizing Protected Designation of Origin (PDO) "Vinagres de Montilla-Moriles" wine vinegars and for classifying them as a function of the manufacturing process used. Three spectrophotometers were evaluated for this purpose: two monochromator instruments (Foss NIRSystems 6500 SY-I and Foss...

2010
Peyman Zirak Raquel Delgado-Mederos Joan Martí-Fàbregas Turgut Durduran

Acetazolamide (ACZ) was used to stimulate the cerebral vasculature on ten healthy volunteers to assess the cerebral vasomotor reactivity (CVR). We have combined near infrared spectroscopy (NIRS), diffuse correlation spectroscopy (DCS) and transcranial Doppler (TCD) technologies to non-invasively assess CVR in real-time by measuring oxy- and deoxy-hemoglobin concentrations, using NIRS, local cer...

Journal: :IOP conference series 2022

Abstract Near Infrared Reflectance Spectroscopy (NIRS) is an alternative method that can be applied in the evaluation of feed ingredients. The purpose this study was to evaluate vitro digestibility value fermented cocoa pods using NIRS analysis. This used 18 samples shell waste, where material pod skin (KBK) then analysis carried out. Samples were acquired spectrum by Thermo Integrative. Chemic...

1998
R. J. Kohel

The status of ongoing research to use near infrared reflectance spectroscopy (NIRS) to measure cottonseed oil content is summarized. A data set of 36 seed samples consisting of a single replication of six entries grown at two locations for 3 yr was used to generate prediction equations for oil content of cottonseed (Gossypium hirsutum L.). The equations were generated with NIRS based on seed-oi...

2014
M. Rinne L. Nyholm A. Sairanen T. Pitkänen E. A. Mäntysaari M. H. Lidauer

Near infrared reflectance spectroscopy (NIRS) provides an opportunity to measure cowspecific organic matter digestibility (OMD) from fecal samples. In this study individual digestibility measurements from a trial with 47 cows were investigated. Digestibility increased when lactation progressed. The repeatability estimates between different lactation stages were low which suggests that several f...

Journal: :Poultry science 2004
Y Liu B G Lyon W R Windham C E Lyon E M Savage

The feasibility of predicting pH, color, shear force, and sensory characteristics of chicken breasts deboned at 2, 4, 6, and 24 h postmortem by visible/near infrared reflectance spectroscopy (NIRS) in the 400 to 1850 nm region was determined. Prediction of physical attributes of Commission Internationale de l'Eclairage (CIE) color values (L*, a*, and b*), pH, and shear force had better accuraci...

Journal: :Optics letters 2017
Dawid Borycki Oybek Kholiqov Vivek J Srinivasan

Interferometric near-infrared spectroscopy (iNIRS) is a new technique that measures time-of-flight- (TOF-) resolved autocorrelations in turbid media, enabling simultaneous estimation of optical and dynamical properties. Here, we demonstrate reflectance-mode iNIRS for noninvasive monitoring of a mouse brain in vivo. A method for more precise quantification with less static interference from supe...

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