Review
Biochemistry & Molecular Biology
Tomasz Blachowicz, Andrea Ehrmann
Summary: Electrospun nanofiber mats are commonly used in biotechnology or filtration due to their high specific surface area and small pore sizes. While they are typically white, their optical properties can be modified and become highly important in various applications such as sensing devices or solar cells.
Article
Environmental Sciences
Carl J. Legleiter, Brandon J. Sansom, Robert B. Jacobson
Summary: This study demonstrates the potential of remote sensing technology to assess tracer dye concentrations in complex river environments. Through spectral analysis and image processing techniques, detailed information on dye dispersion processes can be provided at a large scale.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Chenyang Zhang, Xuze Han, Gregory Korshin, Andrey M. Kuznetsov, Mingquan Yan
Summary: In this study, the UV-visible absorbance spectra of metal-esculetin systems were calculated to investigate the nature of characteristic bands in the differential UV-visible absorbance spectra associated with the formation of metal-NOM complexes. The results demonstrated that electron transitions between the molecular orbitals near HOMO and LUMO in the metal-esculetin complex are primarily responsible for the prominent features in the DAS of esculetin. The covalent indexes of the metal ions were found to be correlated with the features of the DAS, indicating the strength of metal-esculetin interactions.
Article
Optics
Ayaka Mori, Kyohei Yamashita, Eiji Tokunaga
Summary: To avoid overestimating absorption when using absorption spectroscopy to measure scattering samples, we placed the sample inside an integrating sphere (IS) to collect scattered light at all solid angles. However, determining the absorption coefficient from the absorbance became challenging due to the various paths the light took inside the IS and the sample. Therefore, we used Monte Carlo simulations to trace rays inside the IS and the sample and estimated the relationship between the absorption, scattering, anisotropy coefficients, and the measured absorbance.
Article
Chemistry, Analytical
Meng Wang, Ravi Varma, Dean S. Venables, Wu Zhou, Jun Chen
Summary: This study demonstrates the first detection of benzene, toluene, and xylene using incoherent broadband cavity-enhanced absorption spectroscopy. By calibrating the mirror reflectivity and measuring absorption cross sections, the study provides sensitivity and concentration measurement methods, and demonstrates the instrument's ability to quantify complex mixtures.
ANALYTICAL CHEMISTRY
(2022)
Article
Optics
Vladyslav Bozhynov, Zoltan Kovacs, Petr Cisar, Jan Urban
Summary: This paper introduces a novel research method in aquaphotomics that extends the study of water-light interactions to the visible spectral range. The visible spectral range was used to quantify NaCl concentration in aqueous samples through multivariate analysis, with successful evaluation of concentration changes in visible light. The approach has the potential to reduce costs and increase speed of spectral measurements while providing additional information by extending the useful range in spectrophotometry.
Article
Electrochemistry
Yuqi Li
Summary: A simple deposition technique was utilized to synthesize CuO/TiO2 nanocomposites, revealing a reduction in bandgap with increasing CuO concentration. The CuO-TiO2 nanocomposites efficiently degraded BBF under UV and visible light irradiation, with complete degradation achieved in 60 and 50 minutes respectively.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Domenico Longo, Gaetano Giudice, Giuseppe D'Arrigo, Antonella Sciuto
Summary: This work presents a compact, portable, and remotely operable apparatus for optical absorbance measurements in the ultraviolet region. The system, which utilizes a commercial LED as the light source and a specially designed photo-detector, demonstrates good sensitivity and reliability. It is particularly suitable for measuring low-level concentrations of SO2 in volcanic environments. The laboratory tests and calibration for SO2 monitoring are discussed in detail.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Environmental
Timur Tongur, Erol Ayranci
Summary: The study found that removal of high polarity herbicides through adsorption and electrosorption onto activated carbon cloth was effective, with better results achieved through electrosorption. Adsorption isotherms analysis showed that the Freundlich model was more suitable for describing the adsorption process of herbicides.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Ajaya Bhattarai, Malik Abdul Rub, Dileep Kumar
Summary: The influence of surfactants on the rate constant of valine and ninhydrin was investigated, along with other experimental parameters. The absorbance of different solutions was recorded using UV-visible method, and the rate constant was estimated using a computer-based procedure. The results showed unconventional behavior of the rate constant at different concentrations of surfactants. The critical micelle concentration of the surfactants was determined using conductometric analysis. A model of micellar activity was used for quantitative treatment of the results, and a reasonable reaction mechanism was provided.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Instruments & Instrumentation
Tu Phuong Pham Le, Pakorn Opaprakasit
Summary: This study utilized two-dimensional correlation UV-Vis spectroscopy to investigate the conversion mechanisms among TEMPO, TEMPO+, and TEMPOH, revealing that the conversion between TEMPO and TEMPOH in acidic solution is reversible but becomes irreversible over time. The addition of sodium hypochlorite can accelerate the conversion of TEMPO to TEMPO+.
APPLIED SPECTROSCOPY
(2021)
Article
Multidisciplinary Sciences
Xinyi Zhao, Peiqin Sun, Ke Zhao
Summary: The study investigates the characteristics of average photon energy during the aggregation dynamics of conjugated polymer solutions, as well as its relationship with time. It also analyzes the application of the Hansen Solubility Parameter of the solvent in predicting 'Eave and concludes that 'Eave is effective in describing the aggregation process of conjugated polymer solutions.
Article
Biotechnology & Applied Microbiology
Michael Brandt, Nathan Hau, Bethany F. Laatsch, Aka Torti, Anna R. Berthiaume, Gillian M. Kaat, Eric M. Marcotte, Madison L. Shepler, Lucille S. Smith, Karissa L. Snyder, Jocelyn M. Stepanek, Saige K. Tichy, Scott C. Bailey-Hartsel
Summary: In this study, a novel integrating cavity spectrometer (ICS) was employed to accurately measure the color of beer. Compared to conventional scanning spectrophotometer (CSS), ICS was able to accurately quantify the color of hazy and unconventional beers. The results showed that ICS could successfully eliminate the effects of turbidity and accurately determine the color of unfiltered and centrifuged hazy beers.
JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Monu Malik, Ka Ho Chan, Gisele Azimi
Summary: The study investigates the feasibility of real-time quantification of nickel, cobalt, manganese, and lithium concentration using Ultraviolet-Visible spectroscopy as an alternative method. The technique is effective, flexible, inexpensive, and simple, with a wide range of applications in industries such as wastewater treatment and colloidal nanoparticle characterization.
TMS 2022 151ST ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
R. M. Ohol, B. Vasuki
Summary: This study presents a minifluidic active mixer for liquid mixing with different properties. The mixer utilizes a piezoelectric vibrating beam to circulate and mix the liquid in a tank.
MATERIALS TODAY-PROCEEDINGS
(2022)