Article
Chemistry, Physical
Shuxian Li, Yan Zhao, Fuqiang Hu, Yuechun Jiao, Jianming Zhao, Changyong Li
Summary: This study calculated the potential energy surface (PES) of 2-ethoxybenzonitrile and found five different conformers. The most stable conformer I (trans) was observed in experiments. Theoretical results and experimental measurements were in good agreement. Vibrational structures and transition energies were analyzed.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Applied
Diego Tamburini, Chika Mori Shimada, Blythe McCarthy
Summary: This study analyzed 61 wool fabric samples from the appendix of a dyeing manual published in England in 1893. High performance liquid chromatography was used for molecular characterization. The results showed discrepancies between the dyes described in the manual and the actual dyes used in the samples, with mixtures of different categories of dyes often being used.
Article
Chemistry, Multidisciplinary
Ori Licht, Dario Barreiro-Lage, Patrick Rousseau, Alexandre Giuliani, Aleksandar R. R. Milosavljevic, Avinoam Isaak, Yitzhak Mastai, Amnon Albeck, Raj Singh, Vy T. T. Nguyen, Laurent Nahon, Lara Martinez-Fernandez, Sergio Diaz-Tendero, Yoni Toker
Summary: Possible routes for intra-cluster bond formation (ICBF) in protonated serine dimers have been investigated. Low energy collision-induced dissociation did not show evidence of ICBF, but clear evidence was observed following photon absorption in the 4.6-14 eV range. The comparison of protonated serine dimer and dipeptide provides evidence for peptide bond formation (PBF) in this case of ICBF.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemical Research Methods
Teresa M. Seifried, Paul Bieber, Victor U. Weiss, Ernst Pittenauer, Gunter Allmaier, Martina Marchetti-Deschmann, Hinrich Grothe
Summary: The properties of biogenic aerosol are strongly influenced by the particle's proteinaceous compounds, which have significant impacts on human health and climate. Fluorescence-based techniques are commonly used to detect biogenic aerosol, but some of them exhibit weak fluorescence signals. This study suggests that the fluorescence signal of proteins in birch pollen might be distorted within its native matrix due to the presence of specific quenching components. Therefore, it is crucial to critically analyze the obtained spectra when applying fluorescence spectroscopy to analyze and detect biogenic aerosol in the laboratory or the atmosphere.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Beirong Zhang, Hang Gao, Zhou Gong, Lili Zhao, Bowen Zhong, Zhigang Sui, Zhen Liang, Yukui Zhang, Qun Zhao, Lihua Zhang
Summary: Chemical cross-linking coupled with mass spectrometry (XL-MS) is a crucial technique for the structural analysis of protein complexes. Photo-cross-linking, although heterogenous, is valuable for this analysis. In this study, a photo-cross-linking method using alkynyl-succinimidyl-diazirine (ASD) was demonstrated to enhance structure elucidation for proteins with less lysine and high flexibility. Additionally, enrichment approaches improved cross-link identification coverage. This method can be used for membrane proteome-wide complex analysis and significantly improves XL-MS in functional structure analysis.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Jean-Valery Guillaubez, Delphine Pitrat, Yann Bretonniere, Jerome Lemoine, Marion Girod
Summary: This study developed a method combining mass spectrometry with visible laser induced dissociation (LID) to detect Cys-SOH, improving the specificity of detection in large populations. Through differential tagging, the relative quantification of Cys oxidation was achieved in a cohort of Alzheimer's disease patients' plasma samples.
Article
Chemistry, Multidisciplinary
Corinne A. Lutomski, Tarick J. El-Baba, Joshua D. Hinkle, Idlir Liko, Jack L. Bennett, Neha V. Kalmankar, Andrew Dolan, Carla Kirschbaum, Kim Greis, Leonhard H. Urner, Parth Kapoor, Hsin-Yung Yen, Kevin Pagel, Christopher Mullen, John E. P. Syka, Carol V. Robinson
Summary: By using an infrared laser in a high-pressure linear ion trap, researchers were able to remove detergent micelles and obtain good sequence coverage for membrane proteins and their complexes through top-down mass spectrometry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Maria Misovich, Anusha Priyadarshani Silva Hettiyadura, Wenqing Jiang, Qi Zhang, Alexander Laskin
Summary: This study investigated the impact of simulated solar irradiation on atmospheric aqueous secondary organic aerosol (aqSOA) formed from the oxidation of guaiacyl acetone (GA) by carbon-3 (C-3*) generated by the photoexcitation of 3,4-dimethoxybenzaldehyde (DMB). The results showed the formation of three generations of products and significant changes in the compounds' properties over time due to irradiation. Prior to irradiation, the BrC absorbance is dominated by monomeric species, but it shifts to pyrolytic-like products as the monomeric and dimeric products begin to photodegrade.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Review
Chemistry, Physical
Camilo A. Mesa, Ernest Pastor, Laia Francas
Summary: Electrocatalytic and photoelectrocatalytic technologies play crucial roles in the transition to a circular economy. UV-Vis spectroelectrochemistry is a versatile and simple experimental technique that allows for detailed mechanistic and kinetic understanding of catalytic transformations, facilitating the rational design of efficient (photo)electrocatalysts.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Abdullah Taner Bisgin
Summary: A green, speedy, and handy method for separation and determination of four commonly used food colorants was established using vortex assisted sequential-simultaneous liquid phase micro-extraction (VA-SS-LPME). The method does not require any instrumental chromatographic techniques. The procedure includes sequential separation steps using different extractants and simultaneous UV-vis spectrophotometric determination steps. The method is environmentally friendly and applicable for determination of colorants in food and pharmaceuticals.
MICROCHEMICAL JOURNAL
(2024)
Article
Environmental Sciences
Joslaine Kosman, Joao Frederico Haas Leandro Monteiro, Vinicius Mariani Lenart, Patricia Los Weinert, Elaine Regina Lopes Tiburtius
Summary: This study optimized the mineralization of losartan and hydrochlorothiazide using the photo-Fenton process with UV-Vis LED. The experimental design enabled high rates of mineralization for both pharmaceuticals. The UV-Vis LED was proven to be an effective light source for the photo-Fenton process and provided a useful tool for finding optimal experimental conditions for effluent treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Yaroslav Bazel', Vasyl Sidey, Maksym Fizer, Orest Fedyshyn, Viera Vojtekova, Katarina Reiffova, Yurii Ost, Oleksandr Tymoshuk
Summary: A new method for determining palladium by dispersive liquid-liquid microextraction preconcentration with UV-VIS spectrometry detection has been developed. The method utilizes PNBTAN as a chelating agent and traditional organic solvents, achieving a low limit of detection and good linearity under optimal conditions.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Crystallography
Wen-Ching Hsieh, Bing-Mau Chen, Mu-Chun Wang, Yih-Shing Lee, Chien-Chung Tsai
Summary: This study focuses on enhancing the tunable sensitivity of a photo irradiance sensor (PIS) operating in the NUV-VIS-NIR spectrum using an IAZAOS design. The IAZAOS PIS offers high sensitivity, weak bias dependence, low power consumption, and other advantages.
Article
Chemistry, Analytical
Kaoru Karasawa, Eva Duchoslav, Takashi Baba
Summary: Plasma electron detachment dissociation (EDD) is a novel electron-activated dissociation (EAD) method for the fast sequencing of oligonucleotides with a high sequence coverage. Phosphorothioate (PS) positions showed extremely high dissociation efficiency, while locked nucleotides were not suitable for EDD.
ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Konstantinos Tsiantas, Thalia Tsiaka, Georgios Koutrotsios, Eleni Siapi, Georgios I. Zervakis, Nick Kalogeropoulos, Panagiotis Zoumpoulakis
Summary: In this study, LC-MS methods were found to be more suitable for detecting ergothioneine and lovastatin in mushrooms compared to UV-Vis methods. P. citrinopileatus mushrooms contained the highest amount of ergothioneine, while A. bisporus mushrooms had the highest levels of lovastatin. Mushrooms produced on olive oil and wheat straw substrates had the highest ergothioneine content, while mushrooms from grape marc-based substrates had the highest lovastatin content.