Calibration transfer between near infrared (NIR) spectrometers is a subtle issue in the chemometrics and process industry. Similar instruments may generate strongly different spectral responses, regression models developed on first NIR system can rarely be used with spectra collected by second apparatus. In this work, two novel methods based Structural Equation Modeling (SEM), called Enhanced F...

The era of molecular medicine has ushered in the development of microscopic methods that can report molecular processes in thick tissues with high spatial resolution. A commonality in deep-tissue microscopy is the use of near-infrared (NIR) lasers with single- or multiphoton excitations. However, the relationship between different NIR excitation microscopic techniques and the imaging depths in ...

The work reported compares elastic scattering spectroscopy (ESS) for diagnosis of pigmented skin lesions in two spectral regions: UV-visible and near infrared (NIR). Given the known strong absorption by melanin in the near-UV to mid-visible range of the spectrum, such a comparison can help determine the optimum wavelength range of ESS for diagnosis of pigmented skin lesions. For this purpose, f...

Visible and near infrared spectroscopy (VIS-NIR) is increasingly being transferred from laboratory to industry for in-line portable applications in various domains. By intensively using VIS-NIR spectroscopy, some abnormal observations may certainly arise. It then important properly handle outliers elaborate effective prediction models. The objective of this study investigate the potential a rob...

Abstract Objectives Near-infrared (NIR) spectroscopy is a rapid technique able to assess meat quality even if its capability determine the shelf life of chicken fresh cuts still debated, especially for portable devices. The aim study was compare bench-top and NIR instruments in discriminating between four breast refrigeration times (RT), coupled with multivariate classifier models. Materials Me...

This research studied the authentication of hazelnut oil by portable FT-NIR, FT-MIR, and Raman spectrometers. Hazelnut oils were adulterated with vegetable at various concentrations (0-25%) (w/w). Collected spectra analyzed using Principal Component Analysis (PCA) Soft Independent Modelling Class Analogy (SIMCA) to generate classification models authenticate pure Partial Least Squares Regressio...

NIR spectroscopy has proven to be one of the most efficient and ready to transfer tools to monitor product's quality. Portable VIS/NIR instruments are particularly versatile and suitable for field use to monitor the ripening process or quality parameters. The aim of this work is to develop and evaluate a new simplified optoelectronic system for potential measurements on fruit and vegetables dir...

The use of near-infrared (NIR) light over 1000 nm (OTN-NIR or second NIR) is advantageous for bioimaging because it enables deep tissue penetration due to low scattering and autofluorescence. In this report, we describe the application of rare earth ion-doped ceramic nanoparticles to cancer-targeted NIR imaging using erbium and ytterbium ion-doped yttrium oxide nanoparticles (YNP) functionalize...

background: exposure to loud music from sources such as portable music players (pmp), especially among adolescents, can lead to noise-induced hearing loss. the aims of this study are as follows: 1) investigate the prevalence of headphone use in iranian university students by assessing their behavior, 2) determine the type of headphones used, and 3) ascertain the type of music player used. metho...