Results 221 to 230 of about 124,934 (265)
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2009
The π π* transition of conjugated double bonds is above ≈200 nm with typical intensities of the order of log e ≈ 4. Its position can be estimated with the Woodward– Fieser rule.
Ernö Pretsch +2 more
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The π π* transition of conjugated double bonds is above ≈200 nm with typical intensities of the order of log e ≈ 4. Its position can be estimated with the Woodward– Fieser rule.
Ernö Pretsch +2 more
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2017
This chapter describes ultraviolet-visible (UV–Vis) spectroscopy because it is one of the most important analytical techniques used for a wide range of applications including food and beverage analysis, life sciences, clinical diagnostics, drug discovery, and environmental science.
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This chapter describes ultraviolet-visible (UV–Vis) spectroscopy because it is one of the most important analytical techniques used for a wide range of applications including food and beverage analysis, life sciences, clinical diagnostics, drug discovery, and environmental science.
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Multivariate calibration in UV-vis spectroscopy
Journal of Chemometrics, 2005A multivariate calibration procedure based on principal component analysis is proposed. UV–vis spectra of ternary mixtures have been used to check the applicability of the procedure.
C. Pizarro +2 more
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UV–Vis Spectroscopy for Food Analysis
2021Detection of food quality, authenticity, and adulteration is a great concern among consumers in the current market. Given the inherent complexity of food products, most instrumental techniques employed for quality and authenticity evaluation are time-consuming, expensive, and labor-intensive.
Farah Haque +2 more
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Time-Resolved UV-VIS Spectroscopy of Microbial Rhodopsins
2022Absorption of light quanta by microbial rhodopsins (or more generally by retinal proteins) leads to conversion of the light energy to the generation of transmembrane anion or cation gradients, optically gated channels, or signal states in photoreception.
Dmytro, Soloviov +2 more
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UV–VIS absorption spectroscopy: Lambert-Beer reloaded
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2017UV-VIS absorption spectroscopy is used in almost every spectroscopy laboratory for routine analysis or research. All spectroscopists rely on the Lambert-Beer Law but many of them are less aware of its limitations. This tutorial discusses typical problems in routine spectroscopy that come along with technical limitations or careless selection of ...
Werner, Mäntele, Erhan, Deniz
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Ultraviolet-Visible (UV-VIS) Spectroscopy
2019UV-VIS spectroscopy is considered as the most important spectrophotometric technique that is most widely used for the analysis of variety of compounds. This technique works on the basis of the measurement of interaction of electromagnetic radiations (EMR) with matter at particular wavelength.
Muhammad Sajid Hamid Akash +1 more
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Characterisation of red mud by UV–vis–NIR spectroscopy
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2009The characterisation of red mud has been studied by diffuse reflectance spectroscopy in the UV-vis-NIR region (DRS). For the first time the ferric ion responsible for the bands has been identified from electronic spectroscopy. It contains valuable amounts of oxidised iron (Fe(3+)) and aluminium hydroxide.
Palmer, Sara +2 more
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Synthesis, UV-VIS Spectroscopy and Conductivity of Silver Nanowires
2014In this work, we report on the synthesis of silver nanowires (AgNW) by a modified polyole process. Conductive thin films were prepared from synthesized nanowires; then their basic properties were characterized. The influence of the raw materials, solvents, washing and centrifugal separation of these synthesized AgNWs was studied.
Kostova, Irena +3 more
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Size Evaluation of Gold Nanoparticles by UV−vis Spectroscopy
The Journal of Physical Chemistry C, 2009We present a method for the evaluation of the average size of gold nanoparticles based on the fitting of their UV-vis spectra by the Mie model for spheres. The method gives good results using a calibration of the dumping frequency of the surface plasmon resonance and accounting for the presence of nonspherical AuNP in solution by the Gans model for ...
AMENDOLA, VINCENZO, MENEGHETTI, MORENO
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