Article
Medicine, Legal
Makenzie Kuehn, Kevin Bates, J. Tyler Davidson, Geraldine Monjardez
Summary: The detection of intact explosives in the field is a unique challenge, and handheld Raman instruments have become popular for their speed, reliability, and portability. However, there is limited research on the detection capabilities of these instruments for explosive compounds. This study evaluated the detection capabilities of two handheld Raman spectrometers and investigated interference from glass and plastic containers. The results showed reproducible spectra for all analytes across both instruments, with the Rigaku ResQ-CQL displaying better resolution.
FORENSIC SCIENCE INTERNATIONAL
(2023)
Article
Spectroscopy
F. M. Rufino, D. L. M. Vasconcelos, P. T. C. Freire, R. C. Oliveira, C. M. R. Remedios, J. H. da Silva, F. G. Alabarse, J. A. Lima
Summary: Maleic acid was studied under high pressure conditions using Raman spectroscopy and powder synchrotron XRD. The results showed a decrease in lattice parameters and a reduction in unit cell volume. Changes in compressibility were observed at specific pressure points.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
H. J. Ojeda-Galvan, A. C. Hernandez-Arteaga, M. C. Rodriguez-Aranda, J. F. Toro-Vazquez, N. Cruz-Gonzalez, S. Ortiz-Chavez, M. Comas-Garcia, A. G. Rodriguez, H. R. Navarro-Contreras
Summary: Raman spectroscopy was used to study the thermal denaturation of three different proteins and the decomposition temperature of three amino acids. The results obtained were compared with those measured by DSC and TGA, showing the applicability of Raman spectroscopy in studying the denaturation and decomposition temperatures of proteins and amino acids.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Hongzhi Liang, Aori Qileng, Haoran Shen, Yaowei Zhou, Weipeng Liu, Hongtao Lei, Yingju Liu
Summary: A time-based readout (TBR) device controlled by a smartphone was developed for the sensitive and selective immunoassay of rosiglitazone (RSG). The TBR device showed linear responses for the detection of RSG and has the potential for point-of-care monitoring of hazardous materials in food or the environment.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Yeran Bai, Zhongyue Guo, Fatima C. Pereira, Michael Wagner, Ji-Xin Cheng
Summary: A mid-infrared photothermal-fluorescence in situ hybridization (MIP-FISH) platform is developed for simultaneous identification and metabolic analysis of microbes with single-cell resolution and high throughput. By improving MIP imaging, isotopically labeled compounds incorporated into proteins of individual bacterial cells can be sensitively detected, while FISH labeling with rRNA-targeted probes enables the identification of the analyzed cells. In proof-of-concept experiments, MIP-FISH successfully discriminates and identifies labeled bacterial cells within a complex human gut microbiome sample based on the clear spectral red shift in the protein amide I region caused by incorporation of 13C atoms from 13C-labeled glucose. This study opens up new opportunities for single-cell structure-function analyses in microbiology.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
U. K. Adarsh, E. Bhoje Gowd, Aseefhali Bankapur, V. B. Kartha, Santhosh Chidangil, V. K. Unnikrishnan
Summary: Mounting plastic waste poses a serious threat to the environment and public health. Recycling is a practical solution, but it relies on accurate waste sorting techniques. This study proposes a multi-modal spectroscopic sensor that combines laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy to assist in plastic identification and sorting for recycling. The system shows promising results in classifying different types of plastics in both laboratory and real-world conditions.
Article
Biochemistry & Molecular Biology
Paz Arjonilla, Ana Dominguez-Vidal, Ramon Rubio Domene, Elena Correa Gomez, Maria Jose de la Torre-Lopez, Maria Jose Ayora-Canada
Summary: Non-invasive techniques were used to study Hispano Muslim wall paintings, revealing differences and similarities among measurement points and providing insights into past interventions and plaster deterioration. The study's representativeness was also validated.
Article
Chemistry, Multidisciplinary
Wen -Fang Song, Wei-Qin Yao, Qi-Wen Chen, Diwei Zheng, Zi-Yi Han, Xian-Zheng Zhang
Summary: This study developed a bioorthogonal-mediated bacterial delivery strategy to enhance the colonization of probiotics by modulating bacterial adhesion between probiotics and gut inhabitants, thereby improving the clinical treatment efficacy of oral bacterial therapy.
ACS CENTRAL SCIENCE
(2022)
Article
Multidisciplinary Sciences
Sunanda Sharma, Ryan D. Roppel, Ashley E. Murphy, Luther W. Beegle, Rohit Bhartia, Andrew Steele, Joseph Razzell Hollis, Sandra Siljestrom, Francis M. McCubbin, Sanford A. Asher, William J. Abbey, Abigail C. Allwood, Eve L. Berger, Benjamin L. Bleefeld, Aaron S. Burton, Sergei V. Bykov, Emily L. Cardarelli, Pamela G. Conrad, Andrea Corpolongo, Andrew D. Czaja, Lauren P. DeFlores, Kenneth Edgett, Kenneth A. Farley, Teresa Fornaro, Allison C. Fox, Marc D. Fries, David Harker, Keyron Hickman-Lewis, Joshua Huggett, Samara Imbeah, Ryan S. Jakubek, Linda C. Kah, Carina Lee, Yang Liu, Angela Magee, Michelle Minitti, Kelsey R. Moore, Alyssa Pascuzzo, Carolina Rodriguez Sanchez-Vahamonde, Eva L. Scheller, Svetlana Shkolyar, Kathryn M. Stack, Kim Steadman, Michael Tuite, Kyle Uckert, Alyssa Werynski, Roger C. Wiens, Amy J. Williams, Katherine Winchell, Megan R. Kennedy, Anastasia Yanchilina
Summary: Our findings on Mars suggest the presence of diverse aromatic organic molecules within the Maaz and Seitah formations in Jezero crater, indicating different fates of carbon across environments. These organic molecules, largely associated with minerals linked to aqueous processes, persist despite exposure to surface conditions, suggesting the key role of water processes in organic synthesis, transport, or preservation.
Review
Chemistry, Analytical
Arya Suresh Babu, Anjali Tomar, Shweta Sharma
Summary: This study explores the existing trends in examining the sequence of ink strokes using vibrational spectroscopic techniques (infrared and Raman spectroscopy) and proposes future research directions in this field. The findings suggest that factors like paper type and time gap between strokes do not affect the determination of stroke sequence. The use of multiple analytical techniques in combination with vibrational spectroscopic techniques can provide reliable results.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Vladimir Zholobenko, Frank Rutten, Aleksey Zholobenko, Amy Holmes
Summary: Near-infrared spectroscopy is potentially the most powerful method for asbestos identification in construction materials, allowing for efficient discrimination and identification of different types of asbestos by focusing on specific spectral regions and optimizing instrument sensitivity and resolution.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Plant Sciences
Muhammad Farooq, Yoon-Hee Jang, Eun-Gyeong Kim, Jae-Ryoung Park, Gyu-Hyeon Eom, Dan-Dan Zhao, Kyung-Min Kim
Summary: Amino acids are crucial for plant species, such as rice, as they serve as the fundamental units of protein building blocks. This study aimed to investigate the amino acid profiles of four rice genotypes under NaCl, CaCl2, and MgCl2 stress. The results showed that the content of essential and non-essential amino acids significantly increased in cultivar Cheongcheong under NaCl and MgCl2 application, while total amino acid content increased in cultivar Nagdong under all three salt types. Salt-sensitive cultivar IR28 and salt-tolerant Pokkali exhibited lower levels of total amino acid content under different salt stress conditions. The findings suggest that the amino acid profile of each rice cultivar is influenced by its origin, immune level, and genetic makeup.
Review
Biochemistry & Molecular Biology
Amir Handelman
Summary: This article presents the characterization of self-assembled peptides' and amino acids' (SAPA) micro- and nanostructures using polarization-based optical measurement methods. The discussed methods include polarized Raman spectroscopy, polarized imaging microscopy, birefringence imaging, and fluorescence polarization. The article also discusses an example of linear polarized waveguiding in an amino acid Histidine microstructure and describes the implementation of a polarization-based measurement method for monitoring peptide self-assembly processes and deriving molecular orientation.
Article
Chemistry, Analytical
Abdelali Boukaoud, Younes Chiba, Djamel Sebbar
Summary: Efforts to decrypt the vibrational spectra of amino acids in the high wavenumber region remain a challenge. Through the investigation of five amino acid crystals, discrepancies in band assignments for O-H and N-H stretching modes were clarified and the importance of structural and vibrational properties in H-bonding networks was emphasized. Previous theoretical studies using non-periodic approaches failed to accurately describe vibrational behaviors in certain regions.
VIBRATIONAL SPECTROSCOPY
(2021)
Article
Physics, Multidisciplinary
J. L. Allen, T. J. Sanders, J. Horvat, R. A. Lewis, K. C. Rule
Summary: Density-functional theory is used to predict the frequency and dipole moment of molecular crystals' fundamental oscillations. However, previous studies have had shortcomings, such as the use of impure and diluted materials and the inability to distinguish different vibrational modes. This study overcomes these obstacles by analyzing the low-temperature polarized THz spectra of single-crystal L-alanine and comparing them with density-functional theory calculations, resulting in corrected mode assignments and the discovery of unreported modes.
PHYSICAL REVIEW LETTERS
(2023)
Review
Chemistry, Analytical
Jan Jehlicka, Adam Culka
Summary: This article focuses on the progress and recent developments in the use of portable Raman spectrometric devices in geosciences and scientific testing of cultural heritage objects. Different types of Raman spectrometric devices are described and evaluated, demonstrating their potential in various applications such as art characterization, indoor environments, outdoor investigations, and extreme Earth environments.
ANALYTICA CHIMICA ACTA
(2022)
Article
Spectroscopy
Katerina Nemeckova, Adam Culka, Jan Jehlicka
Summary: Microbial colonisations of gypsum from different sites from Southern Sicily and Eastern Poland were investigated using laboratory-based Raman microspectrometers and portable Raman spectrometric devices. Common microbial pigments were detected in majority of the samples and Raman microspectrometric investigations of colonisations allow to gather detailed information about pigment distribution in micrometric zones of gypsum samples. Portable instrumentation permits also detection of carotenoids and discussed the shifts of positions of Raman features of carotenoids between gypsum samples.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Oncology
Teodora Oltean, Lien Lippens, Kelly Lemeire, Caroline De Tender, Marnik Vuylsteke, Hannelore Denys, Katrien Vandecasteele, Peter Vandenabeele, Sandy Adjemian
Summary: Irradiation can trigger different cellular responses, including immunogenic cell death. This study aims to determine whether intra-tumoral immunogenic cell death markers can predict the outcomes of patients with cervical cancer.
FRONTIERS IN ONCOLOGY
(2022)
Article
Spectroscopy
Peter Vandenabeele, Catarina Pereira Miguel, Anastasia Rousaki, Silvia Bottura Scardina, Mathilda Larsson-Coutinho, Miriam Pressato, Antonio Candeias
Summary: Raman spectroscopy is widely used in the analysis of art objects due to its non-destructive nature and the availability of mobile instruments. However, the stable positioning required by Raman spectroscopy limits its accessibility to every spot of large artifacts. Therefore, exploring the use of zoom lenses for Raman investigation at different working distances is valuable.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Archaeology
Christopher J. Brooke, Howell G. M. Edwards, Filip Kosek, Jan Jehlicka, Caroline Stanford, Matthew J. Champion
Summary: Coade stone has been a significant material in architecture and design since the 18th century. This paper presents a new spectroscopic analysis of Coade stone and a newly discovered sample from Oxnead Hall, revealing that the two variants can be differentiated by the raw materials and production processes.
Article
Spectroscopy
Filip Kosek, Ivan Nemec, Jan Jehlicka
Summary: Pabellon de Pica, Tarapaca, Chile, is a former guano mine where unique Cu-bearing minerals have been formed as a result of supergene processes. The Raman spectroscopic investigation of these minerals revealed specific characteristic vibrations and substantial proliferation and shifting of numerous bands. These findings provide valuable structural and spectroscopic data for further understanding of these minerals.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Spectroscopy
Adam Culka, Jan Jehlicka, Stanislav Oplustil
Summary: This study investigates the estimation of carbonification degree of coals using Raman microspectroscopy. The analysis is performed on maceral grains and the miniaturized Raman spectrometers offer fast analysis and in situ analysis capabilities. The study shows that portable Raman spectrometers with appropriate excitation can discriminate different types of carbonaceous matter.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Spectroscopy
Jan Jehlicka, Adam Culka, Katerina Nemeckova, Jan Mares
Summary: In this study, Raman spectra were used to investigate the presence and distribution of scytonemin and carotenoids in epilithic and endolithic colonisations in temperate areas of Central Europe and Sicily. The results showed that scytonemin was commonly found in cyanobacterial epiliths dominated by cyanobacteria such as Scytonema, Stigonema, Hassallia, Gloeocapsopsis and Gloeocapsa. Additionally, scytonemin was also detected in endolithic colonisations in gypsum. The findings suggest that scytonemin is present in both endoliths and epiliths from areas that are not considered climatically extreme.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Spectroscopy
Eva Vermeersch, Filip Kosek, Johan De Grave, Jan Jehlicka, Peter Vandenabeele, Anastasia Rousaki
Summary: Manganese oxides are widely studied due to their diverse applications in industry, such as steel production, catalysis, and toxin removal. They are also used as pigments in archaeological artifacts. However, identifying different types of manganese oxides using Raman spectroscopy is challenging due to their weak scattering and vulnerability to lasers. In this research, seven natural mineral samples were characterized using micro-Raman spectroscopy with two different laser wavelengths, resulting in well-defined Raman spectra for each manganese oxide phase.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Spectroscopy
Howell G. M. Edwards, Jan Jehlic, Katerina Nemeckova, Adam Culka
Summary: Microbial colonisations of gypsum from Eastern Poland were investigated using Raman microspectrometry with 445 nm excitation. The presence of scytonin in cyanobacterial colonisation of gypsum was observed for the first time, adding a new biomolecular signature to the library of biological pigments for the detection of traces of life in planetary missions.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Cell Biology
Benjamin Cappe, Mike Vadi, Eliza Sack, Ludivine Wacheul, Bruno Verstraeten, Sara Dufour, Julien Franck, Wei Xie, Francis Impens, An Hendrix, Denis L. J. Lafontaine, Peter Vandenabeele, Franck B. Riquet
Summary: Formation of extracellular vesicles (EVs) plays a crucial role in cell-to-cell communication, and there are differences in the biogenesis and composition of EVs during different types of cell death processes.
JOURNAL OF EXTRACELLULAR VESICLES
(2023)
Article
Art
Andrea Acevedo-Mejia, Mafalda Costa, Peter Vandenabeele, Luis Dias, Jose C. Frade, Milene Gil
Summary: This study analyzes the deteriorated green paint layers from mural paintings at the Maritime Station of Alcantara in Lisbon, Portugal. The analysis identifies the composition of the green pigments and the decay agents causing the visible degradation. The main cause of the deterioration is believed to be calcium sulphates, which are found to be widespread in all the analyzed samples.
INTERNATIONAL JOURNAL OF CONSERVATION SCIENCE
(2023)