Article
Biochemical Research Methods
Yadi Wang, Huiping Liu, Feng Geng, Pan Yang, Junhong Lu, Xueling Li
Summary: We developed an infrared microspectroscopy-based method to quantitatively evaluate and describe biofilm phenotypic characteristics by calculating spectral similarity. This approach revealed phenotypic variation during biofilm formation and heterogeneity between two E. coli strains. Two-dimensional correlation spectroscopy was used to investigate biochemical component evolution during E. coli biofilm formation and identified trends in polysaccharide molecule changes, providing new opportunities for infrared microspectroscopy in studying biofilm formation.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Chemistry, Physical
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Muhammad Hadi, Emad H. Raslan, Rajesh Kumar, Muhammad Farzik Ijaz, Abdulaziz K. Assaifan
Summary: The synthesis of vanadium-doped BCZT ceramic oxides was reported in this paper, confirming the existence of a solubility limit of V in BCZT ceramics. Analysis revealed the influence of crystal structure and formation of oxygen vacancies on the luminescence and electrical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Biochemistry & Molecular Biology
Maria Teresa Caccamo, Salvatore Magazu
Summary: The aim of this study is to investigate the hydration properties of glucose and its hydrogen bond network in glucose-water mixtures. The temperature behavior of these mixtures was characterized using Fourier Transform InfraRed (FTIR) spectroscopy, specifically by analyzing the intramolecular OH stretching mode in the spectral range of 3000-3700 cm(-1) through the evaluation of Spectral Distance (SD). The results obtained were consistent with literature data, showing a maximum strength of the hydrogen bond network at a specific concentration value.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
William A. Maza, Daniel A. Steinhurst, Melissa D. McIntyre, Robert A. Walker, Jeffrey C. Owrutsky
Summary: This study investigated the behavior of solid oxide fuel cells (SOFCs) operating with simulated syngas, revealing that SOFCs using syngas with a higher H-2 concentration are more prone to heating compared to running on H-2 or CO alone, and that carbon is not observed on the anode surface at 800 degrees C although present in the electrochemically active region at the electrolyte-electrode interface.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Applied
Leandro da Rocha Novaes, Argimiro Resende Secchi, Vera Maria Martins Salim, Neuman Solange de Resende
Summary: This study explores the relationship between feed properties, operating conditions, and deactivation phenomenon during middle distillates hydroprocessing. An accelerated deactivation methodology was employed to study this phenomenon. The results show that 100 hours of operation is needed for the initial deactivation during the stabilization step. Easy and portable tools, such as Fourier Transform Infrared analysis and density measurements, were successfully used to monitor and evaluate the hydrotreating process. It was also found that feedstock properties can directly influence the deactivation phenomenon, and process modifications can be identified using Fourier Transform Infrared analysis.
Article
Environmental Sciences
Cristopher Dominguez-Hernandez, Cristina Villanova-Solano, Marta Sevillano-Gonzalez, Cintia Hernandez-Sanchez, Javier Gonzalez-Salamo, Cecilia Ortega-Zamora, Francisco Javier Diaz-Pena, Javier Hernandez-Borges
Summary: Partial evaporation and solidification of plastic materials, mainly microplastics, onto coastal rocks can form a new solid structure called plastitar. These formations have been found in several islands of the Canary Islands archipelago and can permanently attach to the rock, occupying a significant portion of the sampled area. The plastitar primarily consists of tar and polyethylene, with microplastics in the form of fragments, pellets, and lines. The increasing presence of plastics, particularly microplastics, in coastal environments may lead to the common occurrence of these new plastic formations, which require further investigation on their long-term effects on coastlines.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Optics
Chunlei Sun, Chuyu Zhong, Maoliang Wei, Hui Ma, Ye Luo, Zequn Chen, Renjie Tang, Jialing Jian, Hongtao Lin, Lan Li
Summary: An innovative optical filter with FSR-free operation capability, subnanometer optical bandwidth, and acceptable fabrication tolerance has been demonstrated, showing great potential for large-capacity optical transmission and multiparameter sensing applications. By appropriately designing a specific structure of filter unit, a single deep dip within a wide bandwidth can be observed, and multiple units can be cascaded to achieve a multichannel filter.
PHOTONICS RESEARCH
(2021)
Article
Environmental Sciences
Le Thi Thu Hien, Anne Gobin, Duong Thi Lim, Dang Tran Quan, Nguyen Thi Hue, Nguyen Ngoc Thang, Nguyen Thanh Binh, Vu Thi Kim Dung, Pham Ha Linh
Summary: Soil salinity has a significant impact on agricultural production, especially in low-lying coastal areas where saltwater intrusion is a growing concern. Monitoring salinity is challenging due to the influence of soil moisture on the soil's spectral signature. The study found that Fourier-transform infrared spectroscopy can be used to map salt-affected soils, particularly in inaccessible areas. Advancements in thermal satellite sensors may provide possibilities for monitoring soil salinity in the future.
Article
Green & Sustainable Science & Technology
Naipeng Tang, Chenyang Xue, Gengren Hao, Weidong Huang, Hongzhou Zhu, Rui Li
Summary: This study investigated the crosslinking mechanism between degraded rubber, styrene-butadiene-styrene (SBS) polymer, and crosslinking agent in terminal blend (TB) rubberized asphalt. The results showed that sulfur alone had a weak crosslinking reaction with TB rubberized asphalt, but the addition of SBS polymer enhanced the crosslinking reaction. The study also identified two types of crosslinking reactions involving conjugated olefins, with Type II reaction effectively improving the high temperature performance of TB rubberized asphalt.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Multidisciplinary
Benedikt Fischer, Andreas Lambertz, Maurice Nuys, Wolfhard Beyer, Weiyuan Duan, Karsten Bittkau, Kaining Ding, Uwe Rau
Summary: This study demonstrates that Raman spectroscopy is suitable for directly determining the microstructure of thin hydrogenated amorphous silicon layers on silicon heterojunction solar cells. A detailed comparison of FTIR and Raman spectroscopy shows significant differences in the microstructure parameter with decreasing a-Si:H film thickness.
ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Weiqian Jia, Aleksandra Karapetrova, Mengjun Zhang, Libo Xu, Kang Li, Muke Huang, Jie Wang, Yi Huang
Summary: This study combined laser direct in-frared (LDIR) and Fourier-transform infrared (FTIR) methods to investigate microplastics in agricultural soils. The results showed that microplastics were present in high abundance, with particles ranging from 10 to 500μm accounting for the majority. Polyethylene, polypropylene, and polyvinyl chloride were the dominant polymer types. Reclaimed water from sewage treatment plants, drip irrigation utilities, and residual plastic film were identified as potential sources. The study also highlighted the underestimation of microplastic contamination in agricultural soils using visual counting methods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Jeehye Yang, Myeongjae Lee, Se Young Park, Myoungjin Park, Jonghoon Kim, Niranjan Sitapure, Donghyo Hahm, Seunghyun Rhee, Daeyeon Lee, Hyunwoo Jo, Yong Hyun Jo, Jaemin Lim, Jungwook Kim, Tae Joo Shin, Doh C. Lee, Kyungwon Kwak, Joseph S. Kwon, BongSoo Kim, Wan Ki Bae, Moon Sung Kang
Summary: This paper reports a nondestructive direct photopatterning method for heavy-metal-free quantum dots (QDs) using branched light-driven ligand crosslinkers (LiXers). It demonstrates the ability to create multicolored QD patterns on a micrometer scale without compromising the intrinsic optoelectronic properties of the QDs, and extends the device lifetime.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Liang Liang, Quanchen Feng, Xingli Wang, Jessica Huebner, Ulrich Gernert, Marc Heggen, Longfei Wu, Tim Hellmann, Jan P. Hofmann, Peter Strasser
Summary: This study investigates the chemical selectivity and faradaic efficiency of high-index Cu facets for the CO2 reduction reaction (CO2RR). Shape-controlled nanoparticles with Cu {hk0} facets are fabricated using Cu multilayer deposition on Au truncated ditetragonal nanoprisms (Au DTPs). The high-index {hk0} facets of 7 nm Au@Cu DTPs exhibit a CH4 : CO product ratio of almost 10 : 1 compared to a 1 : 1 ratio for reference Au@Cu nanoparticles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Pharmacology & Pharmacy
Laura Catenacci, Milena Sorrenti, Chiara Milanese, Caterina Valentino, Alexios I. Vicatos, Mino R. Caira, Maria Cristina Bonferoni
Summary: The aim of this study was to provide a comprehensive and systematic characterization of the solid-state properties of the polyphenol pterostilbene (PTB) by accurately screening existing polymorphs. The study is relevant from the perspective of drug formulation due to the impact of crystal polymorphism on the physicochemical properties of biologically active compounds.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ievgeniia Topolniak, Vasile-Dan Hodoroaba, Dietmar Pfeifer, Ulrike Braun, Heinz Sturm
Article
Multidisciplinary Sciences
Daniel Dittmann, Paul Eisentraut, Caroline Goedecke, Yosri Wiesner, Martin Jekel, Aki Sebastian Ruhl, Ulrike Braun
SCIENTIFIC REPORTS
(2020)
Article
Environmental Sciences
Axel Mueller, Caroline Goedecke, Paul Eisentraut, Christian Piechotta, Ulrike Braun
ENVIRONMENTAL SCIENCES EUROPE
(2020)
Article
Engineering, Environmental
Philipp Kloeckner, Bettina Seiwert, Paul Eisentraut, Ulrike Braun, Thorsten Reemtsma, Stephan Wagner
Article
Chemistry, Multidisciplinary
Ajmal Zarinwall, Tassilo Waniek, Reza Saadat, Ulrike Braun, Heinz Sturm, Georg Garnweitner
Summary: The study demonstrates that adjusting the surface properties of nanofillers allows for selectively designing interactions to optimize the advantages of nanocomposites. By using specific process parameters, a monolayer can be formed on BNP, resulting in a maximal grafting density of 1.3 molecules/nm^2. Unsuspected multilayer formation is observed only under acidic conditions.
Article
Chemistry, Applied
Ulrike Braun, Korinna Altmann, Dominik Herper, Markus Knefel, Marius Bednarz, Claus G. Bannick
Summary: The study proposes a new method for analyzing microplastics in food products using a smart filter crucible, allowing for direct determination of their mass content. It was found that the type of beverage bottle can affect the microplastic content, especially related to the quality of plastic material in the screw cap, and particle formation increases during use phase operations.
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
(2021)
Article
Polymer Science
Tassilo Waniek, Ulrike Braun, Dorothee Silbernagl, Heinz Sturm
Summary: This study investigates the interactions of boehmite nanoparticles with the epoxy polymer matrix during the curing process, revealing that water released from the nanoparticles strongly influences the curing process by hydrolysis or protonation. These changes provide new explanations for the altered material properties discussed in recent research.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Axel Mueller, Birgit Kocher, Korinna Altmann, Ulrike Braun
Summary: Tire wear is a significant source of microplastic in terrestrial ecosystems. In this study, TED-GC/MS was used for the first time to detect tire wear in soil samples, and the results showed that the majority of tire wear particles ended up in the topsoil within a 2 meter distance from the road.
Article
Engineering, Multidisciplinary
L. Wander, L. Lommel, K. Meyer, U. Braun, A. Paul
Summary: This study demonstrates a method for the low-level mass quantification of microplastics using near-infrared spectroscopy combined with a simple and rapid microplastic enrichment protocol. The method was optimized and successfully used to identify and quantify microplastics in the mass range of 1-10 mg.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Water Resources
Daniel Dittmann, Leon Saal, Frederik Zietzschmann, Maike Mai, Korinna Altmann, Dominik Al-Sabbagh, Pia Schumann, Aki Sebastian Ruhl, Martin Jekel, Ulrike Braun
Summary: Water treatment with activated carbon is a reliable method for removing organic micropollutants and natural organic matter. This study investigates the material properties of different commercially available activated carbons and suggests that proper material characterization can help predict the removal efficiency of specific pollutants.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Maria Kittner, Alexander Kerndorff, Mathias Ricking, Marius Bednarz, Nathan Obermaier, Marcus Lukas, Mina Asenova, Gabor Bordos, Paul Eisentraut, Philipp Hohenblum, Hana Hudcova, Franko Humer, Toth Gyorgy Istvan, Michal Kirchner, Olena Marushevska, Denisa Nemejcova, Peter Oswald, Momir Paunovic, Manfred Sengl, Jaroslav Slobodnik, Karl Spanowsky, Madalina Tudorache, Helmut Wagensonner, Igor Liska, Ulrike Braun, Claus G. Bannick
Summary: In this study, a comprehensive microplastic screening was conducted in a large European river basin, covering the water column from source to estuary. Microplastics were detected in all samples, with polyethylene being the predominant polymer. The chosen approach of integrative sampling and determination of total plastic content was proven to be successful.
Article
Environmental Sciences
Maria Kittner, Alexander Kerndor, Mathias Ricking, Marius Bednarz, Nathan Obermaier, Marcus Lukas, Mina Asenova, Gabor Bordos, Paul Eisentraut, Philipp Hohenblum, Hana Hudcova, Franko Humer, Toth Gyoergy Istvan, Michal Kirchner, Olena Marushevska, Denisa Nemejcova, Peter Oswald, Momir Paunovic, Manfred Sengl, Jaroslav Slobodnik, Karl Spanowsky, Madalina Tudorache, Helmut Wagensonner, Igor Liska, Ulrike Braun, Claus G. Bannick
Summary: In this study, a comprehensive microplastic screening was conducted in a large European river basin. Microplastics were detected in all samples, with polyethylene being the predominant polymer.
Proceedings Paper
Green & Sustainable Science & Technology
Jan Bauer, Paul-Tiberiu Miclea, Ulrike Braun, Korinna Altmann, Marko Turek, Christian Hagendorf
Summary: Microplastic detection in water samples is crucial for tracing their sources, as they can cause harm to desalination facilities and disrupt the marine food chain. Thermoanalytical methods and spectroscopic methods are commonly used for analyzing microplastics, providing fast and accurate results on their size and composition. Machine learning algorithms ensure reliable classification of different plastic materials.
SUSTAINABLE ENERGY-WATER-ENVIRONMENT NEXUS IN DESERTS
(2022)
Article
Chemistry, Analytical
C. Goedecke, D. Dittmann, P. Eisentraut, Y. Wiesner, B. Schartel, P. Klack, U. Braun
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2020)
Article
Chemistry, Analytical
Lukas Wander, Alvise Vianello, Jes Vollertsen, Frank Westad, Ulrike Braun, Andrea Paul
ANALYTICAL METHODS
(2020)
