2,848 results match your criteria near-infrared reflectance

Detection of apple proliferation disease in Malus × domestica by near infrared reflectance analysis of leaves.

Spectrochim Acta A Mol Biomol Spectrosc 2021 Jul 13;263:120178. Epub 2021 Jul 13.

Laimburg Research Centre, Laimburg 6, Pfatten (Vadena), IT-39040 Auer (Ora), South Tyrol, Italy. Electronic address:

In this study near infrared spectroscopical analysis of dried and ground leaves was performed and combined with a multivariate data analysis to distinguish 'Candidatus Phytoplasma mali' infected from non-infected apple trees (Malus × domestica). The bacterium is the causative agent of Apple Proliferation, one of the most threatening diseases in commercial apple growing regions. In a two-year study, leaves were sampled from three apple orchards, at different sampling events throughout the vegetation period. Read More

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Evaluation of non-invasive bioforensic techniques for determining the age of hot-iron brand burn scars in cattle.

Transl Anim Sci 2021 Jul 15;5(3):txab108. Epub 2021 Jun 15.

Agricultural Experiment Station, The University of Arizona, V Bar V Ranch, Rimrock, AZ 86335, USA.

Hot-iron branding is a traditional form of permanent cattle identification in the United States. There is a need for science-based determination of cattle brand age. Near infrared reflectance spectroscopy (NIRS) has been used to obtain information about animal tissues and healing processes. Read More

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Corrigendum: The near-infrared autofluorescence fingerprint of the brain.

J Biophotonics 2021 Jul 14:e202100170. Epub 2021 Jul 14.

Fluorescence Imaging Group, Universidad Autonoma de Madrid, Madrid, Spain.

In the article by J. Lifante et al (doi: 10.1002/jbio. Read More

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How trees thrive in a dry climate: Diurnal and seasonal hydrology and water relations in a riparian cottonwood grove.

Tree Physiol 2021 Jul 14. Epub 2021 Jul 14.

Department of Biological Sciences, University of Lethbridge, 4401 University Drive W., Lethbridge, Alberta T1K 3M4, Canada.

In semi-arid ecoregions trees are restricted to river valley floodplains where river water supplements the limited precipitation. To characterize the associated diurnal and seasonal dynamics in hydrology and water relations we studied narrowleaf cottonwoods (Populus angustifolia) along a prairie river in Canada. From June through August, the shallow soil moisture was depleted but moisture remained higher above the alluvial groundwater table, which dropped to 2. Read More

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Spectral and lifetime resolution of fundus autofluorescence in advanced age-related macular degeneration revealing different signal sources.

Acta Ophthalmol 2021 Jul 13. Epub 2021 Jul 13.

Department of Ophthalmology, University Hospital Jena, Jena, Germany.

Purpose: To determine the fundus autofluorescence (FAF) lifetimes and spectral characteristics of individual drusen and hyperpigmentation independent of those with retinal pigment epithelium (RPE) in geographic atrophy (GA) areas in late-stage age-related macular degeneration (AMD).

Methods: Three consecutive patients with complete RPE and outer retinal atrophy (cRORA) exhibiting drusen that were calcified or associated with hyperpigmentation were investigated with multimodal non-invasive ophthalmic imaging including colour fundus photography (CFP), optical coherence tomography (OCT), near-infrared reflectance (NIR), blue FAF and fluorescence lifetime imaging ophthalmoscopy (FLIO). Fluorescence lifetimes were measured in two spectral channels (short-wavelength spectral channel (SSC): 500-560 nm and long-wavelength spectral channel (LSC): 560-720 nm). Read More

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Trends in feed evaluation for poultry with emphasis on in vitro techniques.

Anim Nutr 2021 Jun 9;7(2):268-281. Epub 2021 Jan 9.

Monogastric Research Centre, School of Agriculture and Environment, Massey University, Palmerston North 4442, New Zealand.

Accurate knowledge of the actual nutritional value of individual feed ingredients and complete diets is critical for efficient and sustainable animal production. For this reason, feed evaluation has always been in the forefront of nutritional research. Feed evaluation for poultry involves several approaches that include chemical analysis, table values, prediction equations, near-infrared reflectance spectroscopy, in vivo data and in vitro digestion techniques. Read More

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Stokes and upconverted luminescence in Er/Yb-doped YGaO nano-garnets.

Dalton Trans 2021 Jul;50(27):9512-9518

Departamento de Física, MALTA Consolider Team, IMN and IUdEA, Universidad de La Laguna, Apdo. Correos 456, 38200 San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain.

The green, red, near-infrared and near-infrared-to-visible upconverted luminescence properties of Er3+/Yb3+ codoped Y3Ga5O12 nanocrystalline powders have been studied using laser spectroscopy. A diffuse reflectance and luminescence spectra confirm that Er3+ and Yb3+ ions occupy the Y3+ sites of the single-phase cubic nano-garnet. Very bright green and red luminescence of the Er3+ ions are detected by the naked eyes, even for a laser power as low as 15 mW, when the Yb3+ ions are excited at 970 nm. Read More

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Using Landsat 8 imagery for remote monitoring of total phosphorus as a water quality parameter of irrigation ponds in Taiwan.

Environ Sci Pollut Res Int 2021 Jul 7. Epub 2021 Jul 7.

Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd, Taipei, 10673, Taiwan.

Monitoring water body quality parameters with high spatial and temporal resolutions is crucial because mitigation of pollution is usually costlier than early prevention/intervention. The existing monitoring methods for irrigation ponds in Taoyuan, Taiwan, are based on field measurements that have low spatial and temporal resolutions. In this study, using Landsat 8 satellite imagery, a multiple regression-derived relationship between the satellite band reflectance and the concentration of total phosphorus (TP) was established. Read More

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Optical coherence tomography angiography of choroidal nodules in neurofibromatosis type-1: A case series.

Eur J Ophthalmol 2021 Jul 7:11206721211030781. Epub 2021 Jul 7.

Ophthalmology Department and Health Research Institute (IdISSC), Hospital Clinico San Carlos, Madrid, Spain.

Purpose: To describe optical coherence tomography angiography (OCTA) findings in the retina and choroid of patients with neurofibromatosis type 1 (NF1).

Methods: We describe a series of four patients diagnosed with NF1 and choroidal nodules who underwent a comprehensive ophthalmic evaluation including a retinal multimodal imaging study based on retinography, near-infrared reflectance imaging (NIR), enhanced depth imaging (EDI) optical coherence tomography (OCT) and OCTA.

Results: Patients were three women and one man aged 36-47 years. Read More

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Multimodal imaging as optical biopsy system for gastritis diagnosis in humans, and input of the mouse model.

EBioMedicine 2021 Jul 2;69:103462. Epub 2021 Jul 2.

Université Paris Saclay/UVSQ, INSERM, Infection and Inflammation, UMR 1173, AP-HP, Hôpital Ambroise Paré, Department of Gastroenterology, F92100, Boulogne-Billancourt, France.

Background: Gastric inflammation is a major risk factor for gastric cancer. Current endoscopic methods are not able to efficiently detect and characterize gastric inflammation, leading to a sub-optimal patients' care. New non-invasive methods are needed. Read More

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High-speed label-free confocal microscopy of with near infrared spectrally encoded confocal microscopy.

Biomed Opt Express 2021 Jun 25;12(6):3607-3618. Epub 2021 May 25.

Mechanical Engineering Department, Lassonde School of Engineering, York University, Toronto, Canada.

() is an optically transparent nematode that shares many gene orthologs and homologs with humans. are widely used in large populations for genetic studies relevant to human biology and disease. Success of such studies frequently relies on the ability to image structure at high-resolution and high-speed. Read More

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Genome-Wide Association Studies Identifying Multiple Loci Associated With Alfalfa Forage Quality.

Front Plant Sci 2021 18;12:648192. Epub 2021 Jun 18.

Plant Germplasm Introduction Testing and Research, Agricultural Research Service, United States Department of Agriculture, Prosser, WA, United States.

Autotetraploid alfalfa is a major hay crop planted all over the world due to its adaptation in different environments and high quality for animal feed. However, the genetic basis of alfalfa quality is not fully understood. In this study, a diverse panel of 200 alfalfa accessions were planted in field trials using augmented experimental design at three locations in 2018 and 2019. Read More

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High Q-Factor Hybrid Metamaterial Waveguide Multi-Fano Resonance Sensor in the Visible Wavelength Range.

Nanomaterials (Basel) 2021 Jun 16;11(6). Epub 2021 Jun 16.

School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China.

We propose a high quality-factor (Q-factor) multi-Fano resonance hybrid metamaterial waveguide (HMW) sensor. By ingeniously designing a metal/dielectric hybrid waveguide structure, we can effectively tailor multi-Fano resonance peaks' reflectance spectrum appearing in the visible wavelength range. In order to balance the high Q-factor and the best Fano resonance modulation depth, numerical calculation results demonstrated that the ultra-narrow linewidth resolution, the single-side quality factor, and Figure of Merit (FOM) can reach 1. Read More

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Thermal and Photocatalytic Performance of Unsaturated Polyester Resins Modified with TiO Nanoparticles as Panel Bodies for Vehicles.

Polymers (Basel) 2021 Jun 22;13(13). Epub 2021 Jun 22.

Tecnove, Avenida de Alcazar 6, Herencia, 13640 Ciudad Real, Spain.

The transport sector is the fastest growing contributor to climate emissions and experiences the highest growth in energy use. This study explores the use of TiO nanoparticles for obtaining photocatalytic nanocomposites with improved infrared reflectance properties. The nanocomposites were prepared by dispersing 0-20 wt% of TiO nanoparticles in an unsaturated polyester resin. Read More

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Near-Infrared Reflectance Spectroscopy for Predicting the Phospholipid Fraction and the Total Fatty Acid Composition of Freeze-Dried Beef.

Sensors (Basel) 2021 Jun 20;21(12). Epub 2021 Jun 20.

Davies Research Centre, School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, SA 5371, Australia.

Research on fatty acids (FA) is important because their intake is related to human health. NIRS can be a useful tool to estimate the FA of beef but due to the high moisture and the high absorbance of water makes it difficult to calibrate the analyses. This work evaluated near-infrared reflectance spectroscopy as a tool to assess the total fatty acid composition and the phospholipid fraction of fatty acids of beef using freeze-dried meat. Read More

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Appraisal of Low-Cost Pushbroom Hyper-Spectral Sensor Systems for Material Classification in Reflectance.

Sensors (Basel) 2021 Jun 27;21(13). Epub 2021 Jun 27.

Mars Society Australis, Clifton Hill, VIC 3068, Australia.

Near infrared (NIR) remote sensing has applications in vegetation analysis as well as geological investigations. For extra-terrestrial applications, this is particularly relevant to Moon, Mars and asteroid exploration, where minerals exhibiting spectral phenomenology between 600 and 800 nm have been identified. Recent progress in the availability of processors and sensors has created the possibility of development of low-cost instruments able to return useful scientific results. Read More

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Comparison of two in situ reference methods to estimate indigestible NDF by near infrared reflectance spectroscopy in alfalfa.

Heliyon 2021 Jun 14;7(6):e07313. Epub 2021 Jun 14.

Department of Dairy Science, University of Wisconsin, Madison, WI, USA.

Undigested forage neutral detergent fiber (uNDF) from long-term ruminal in situ incubations are used to estimate indigestible neutral detergent fiber (iNDF). Measurement of iNDF is important in forage evaluation because it defines the potentially digestible pool of neutral detergent fiber (NDF). Near-infrared reflectance spectroscopy (NIRS) can be calibrated to in situ reference sets to rapidly predict uNDF. Read More

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Contrasting responses of major and minor volatile compounds to warming and gall-infestation in the Arctic willow Salix myrsinites.

Sci Total Environ 2021 Jun 19;793:148516. Epub 2021 Jun 19.

Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark; Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark.

Climate change is altering high-latitude ecosystems in multiple facets, including increased insect herbivory pressure and enhanced emissions of volatile organic compounds (VOC) from vegetation. Yet, joint impacts of climatic drivers and insect herbivory on VOC emissions from the Arctic remain largely unknown. We examined how one-month warming by open-top plastic tents, yielding a 3-4 °C air temperature increase, and the natural presence of gall-forming eriophyoid mites, Aculus tetanothrix, individually and in combination, affect VOC emissions from whortle leaved willow, Salix myrsinites, at two elevations in an Arctic heath tundra of Abisko, Northern Sweden. Read More

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Photonic Multilayer Structure Induced High Near-Infrared (NIR) Blockage as Energy-Saving Window.

Small 2021 Jul 26;17(29):e2100654. Epub 2021 Jun 26.

Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea.

Energy-saving window that selectively blocks near-infrared (NIR) is a promising technology to save energy consumption. However, it is hard to achieve both high transmittance in visible light and high reflectance in NIR for the energy-saving windows. Here, a TiO /Ag/TiO /SiO /TiO multilayer is demonstrated on a glass substrate to selectively block NIR while maintaining high transmittance to visible light. Read More

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Climate predicts both visible and near-infrared reflectance in butterflies.

Ecol Lett 2021 Jun 26. Epub 2021 Jun 26.

Department of Life Sciences, Natural History Museum London, London, UK.

Climatic gradients frequently predict large-scale ecogeographical patterns in animal coloration, but the underlying causes are often difficult to disentangle. We examined ecogeographical patterns of reflectance among 343 European butterfly species and isolated the role of selection for thermal benefits by comparing animal-visible and near-infrared (NIR) wavebands. NIR light accounts for ~50% of solar energy but cannot be seen by animals so functions primarily in thermal control. Read More

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Diagnostic ability of confocal near-infrared reflectance fundus imaging to detect retrograde microcystic maculopathy from chiasm compression. A comparative study with OCT findings.

PLoS One 2021 24;16(6):e0253323. Epub 2021 Jun 24.

Byers Eye Institute, Stanford University, Palo Alto, California, United States of America.

Purpose: To evaluate the ability of confocal near-infrared reflectance (NIR) to diagnose retrograde microcystic maculopathy (RMM) in eyes with temporal visual field (VF) loss and optic atrophy from chiasmal compression. To compare NIR findings with optical coherence tomography (OCT) findings in the same group of patients.

Methods: Thirty-four eyes (26 patients) with temporal VF loss from chiasmal compression and 41 healthy eyes (22 controls) underwent NIR fundus photography, and macular OCT scanning. Read More

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Design and fabrication of a semi-transparent solar cell considering the effect of the layer thickness of MoO/Ag/MoO transparent top contact on optical and electrical properties.

Sci Rep 2021 Jun 22;11(1):13079. Epub 2021 Jun 22.

Photonics Application and Research Center, Gazi University, 06500, Ankara, Turkey.

We conducted the present study to design and manufacture a semi-transparent organic solar cell (ST-OSC). First, we formed a transparent top contact as MoO/Ag/MoO in a dielectric/metal/dielectric (DMD) structure. We performed the production of an FTO/ZnO/P3HT:PCBM/MoO/Ag/MoO ST-OSC by integrating MoO/Ag/MoO (10/[Formula: see text]/[Formula: see text] nm) instead of an Ag electrode in an opaque FTO/ZnO/P3HT:PCBM/MoO/Ag (-/40/130/10/100 nm) OSC, after theoretically achieving optimal values of optical and electrical parameters depending on Ag layer thickness. Read More

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Spectro-temporal analysis of the Paraopeba River water after the tailings dam burst of the Córrego do Feijão mine, in Brumadinho, Brazil.

Environ Monit Assess 2021 Jun 21;193(7):435. Epub 2021 Jun 21.

Department of Forest Engineering, Federal University of Viçosa (UFV), Vicosa, MG, Brazil.

Remote sensing is an important tool for environmental assessment, especially in the event of disasters such as the tailings dam burst at the Córrego do Feijão mine, located in the Paraopeba River basin, Brazil. Thus, this study aimed to carry out a spectro-temporal analysis of the Paraopeba River water given the dam burst, using multispectral images from the MSI sensor onboard Sentinel-2 satellites. For this analysis, sections along the river were defined by the creation of buffers, with 10-km intervals each, starting from the origin of the burst. Read More

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Foveal Displacement following Temporal Inverted Internal Limiting Membrane Technique for Full Thickness Macular Holes: 12 Months Results.

Curr Eye Res 2021 Jul 12:1-8. Epub 2021 Jul 12.

Retina Department, Bursa Retina Eye Hospital, Bursa, Turkey.

To compare conventional 360° internal limiting membrane (ILM) peeling and temporal inverted ILM flap technique with regard to postoperative foveal displacement. Patients who underwent 23 G vitrectomy with either 360° ILM peeling (Group 1) or temporal inverted ILM technique (Group 2) for idiopathic macular hole with a minimum follow up of 12 months were included. The metamorphopsia rates and distances between fovea and 3 retinal landmarks: the first retinal vascular bifurcation or crossover located superonasal and inferonasal to the fovea and ciliary vessel at the temporal margin of the disc, were compared on MultiColor SLO and near-infrared reflectance images. Read More

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On-site substrate characterization in the anaerobic digestion context: A dataset of near infrared spectra acquired with four different optical systems on freeze-dried and ground organic waste.

Data Brief 2021 Jun 11;36:107126. Epub 2021 May 11.

INRAE, UMR ITAP, Montpellier University, Montpellier F-34000, France.

The near infrared spectra of thirty-three freeze-dried and ground organic waste samples of various biochemical composition were collected on four different optical systems, including a laboratory spectrometer, a transportable spectrometer with two measurement configurations (an immersed probe, and a polarized light system) and a micro-spectrometer. The provided data contains one file per spectroscopic system including the reflectance or absorbance spectra with the corresponding sample name and wavelengths. A reference data file containing carbohydrates, lipid and nitrogen content, biochemical methane potential (BMP) and chemical oxygen demand (COD) for each sample is also provided. Read More

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Near Infrared Reflectance Spectroscopy Analysis to Predict Diet Composition of a Mountain Ungulate Species.

Animals (Basel) 2021 May 18;11(5). Epub 2021 May 18.

Ruminant Research Group, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain.

The diet composition of ungulates is important to understand not only their impact on vegetation, but also to understand the consequences of natural and human-driven environmental changes on the foraging behavior of these mammals. In this work, we evaluated the use of near infrared reflectance spectroscopy analysis (NIRS), a quick, economic and non-destructive method, to assess the diet composition of the Pyrenean chamois . Fecal samples ( = 192) were collected from two chamois populations in the French and Spanish Pyrenees. Read More

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Artificial Intelligence Empowered Multispectral Vision Based System for Non-Contact Monitoring of Large Yellow Croaker () Fillets.

Foods 2021 May 21;10(6). Epub 2021 May 21.

College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

A non-contact method was proposed to monitor the freshness (based on TVB-N and TBA values) of large yellow croaker fillets () by using a visible and near-infrared hyperspectral imaging system (400-1000 nm). In this work, the quantitative calibration models were built by using feed-forward neural networks (FNN) and partial least squares regression (PLSR). In addition, it was established that using a regression coefficient on the data can be further compressed by selecting optimal wavelengths (35 for TVB-N and 18 for TBA). Read More

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Fast quantification of total volatile basic nitrogen (TVB-N) content in beef and pork by near-infrared spectroscopy: Comparison of SVR and PLS model.

Meat Sci 2021 Oct 21;180:108559. Epub 2021 May 21.

State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China.

With application of PLS regression and SVR, quantitation models of near infrared diffuse reflectance spectroscopy were established for the first time to predict the content of volatile basic nitrogen (TVB-N) content in beef and pork. Results indicated that the best PLS model based on the raw spectra showed an excellent prediction performance with a high value of correlation coefficient at 0.9366 and a low root-mean-square error of prediction value of 3. Read More

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October 2021

Exploring the Influence of Different Albumin Binders on Molecular Imaging Probe Distribution.

Mol Pharm 2021 Jul 28;18(7):2574-2585. Epub 2021 May 28.

Clinic for Radiology, University Hospital Münster, 48149 Münster, Germany.

The biodistribution of molecular imaging probes or tracers mainly depends on the chemical nature of the probe and the preferred metabolization and excretion routes. Small molecules have rather short half-lives while antibodies reside inside the organism for a longer period of time. An excretion via kidneys and bladder is faster than a mainly hepatobiliary elimination. Read More

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Concurrent starch accumulation in stump and high fruit production in coffee (Coffea arabica).

Tree Physiol 2021 May 27. Epub 2021 May 27.

Eco&Sols, Univ Montpellier, CIRAD, INRAE, IRD, Institut Agro, Montpellier, France.

In coffee, fruit production on a given shoot drops after some years of high yield, triggering pruning to induce re-sprouting. The timing of pruning is a crucial farmer's decision affecting yield and labour. A reason explaining fruit production drop could be the exhaustion of resources, particularly the non-structural carbohydrates (NSC). Read More

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