Article
Multidisciplinary Sciences
Phillip Barden, Christine E. Sosiak, Jonpierre Grajales, John Hawkins, Louis Rizzo, Alexander Clark, Samuel Gatley, Ian Gatley, John Federici
Summary: Amber, as a unique material for paleontological research, can be analyzed using terahertz spectroscopy. This study evaluated the terahertz optical properties of amber samples from different ages and found variations in permittivity among samples. By comparing multiple permittivity models, the model with a distribution of dielectric relaxation times was determined to best describe the spectral permittivity of amber.
Article
Spectroscopy
Li Ying-ying, Zhang Zhi-qing, Wu Xiao-hong, Andy Hsitien Shen
Summary: This study investigates the fluorescence and phosphorescence properties of Indonesian fossil resins. They have at least two fluorophores contributing to visible-range fluorescence, while phosphorescence is influenced by the degree of aromatization in different parts.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2022)
Article
Engineering, Environmental
Debora Sorolla-Rosario, Julio Llorca-Porcel, Monica Perez-Martinez, Dolores Lozano-Castello, Agustin Bueno-Lopez
Summary: The potential of thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) for identifying and quantifying microplastics has been studied, but distinguishing between LDPE and PS poses a challenge due to overlapping melting and glass transition temperatures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Coatings & Films
Atilla C. Varga, Sean T. Barry
Summary: 3D printed ABS and PVA structures were infiltrated with Al2O3 using an ALD process, resulting in a change in their physical properties. The glass transition temperature (T-g) of the polymers was determined using DSC, showing a change of about 9 and 27 degrees C for ABS and PVA, respectively. The amount of infiltration and T-g were affected by growing patterns, polymer composition, and surface coatings.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Thermodynamics
Alexander Klyushnikov, Roza Gulyaeva, Sergey Pikalov
Summary: The cold crystallization kinetics of a glass-crystal composition made from slag of joint smelting of oxidized nickel and sulfide copper ores was studied in an inert atmosphere. XRD and DSC data were used to analyze the crystalline phases released in the glass matrix and determine kinetic parameters.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
J. K. Bansiwal, Ajit Shankar Singh, T. U. Patro, D. S. Bag
Summary: Silicon-containing bis-phthalonitrile (SiPN) resin was synthesized via multi-step synthetic route and characterized using spectroscopic and thermal methods. The curing behavior of the resin was studied using DSC, which showed specific temperature ranges for melting, curing onset, curing exotherm peak, and curing end-set. The thermal stability of the cured resin was assessed using TGA, and the resin exhibited a char yield of 68% at 1073 K.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Crystallography
Ting Zheng, Haibo Li, Taijin Lu, Xiaoming Chen, Bowen Li, Yingying Liu
Summary: Copal resins can be modified to simulate the appearance and spectral characteristics of ambers through different temperature and pressure treatment methods. However, treated copal resins can still be distinguished from natural ambers through spectroscopic methods.
Article
Engineering, Electrical & Electronic
Mulan Mu, Alun Vaughan
Summary: The study demonstrates that bio-derived epoxy systems have temperature-dependent properties, with glass transition temperature, electrical conductivity, and dielectric characteristics showing significant variations with temperature. These systems exhibit good response at higher temperatures and frequencies, making them suitable for specific insulation applications.
Article
Polymer Science
Moritz Stuck, Irina Krenz, Benedikt Schulze Koekelsum, Susanne Boye, Brigitte Voit, Reinhard Lorenz
Summary: The study focused on the influence of different curing conditions and styrene concentrations on the resin properties, demonstrating that the Tg of the network can be increased by applying new thermal curing profiles and increasing the styrene content. Additionally, the partial substitution of problematic styrene with substances like maleic anhydride was found to significantly improve the reactivity and mechanical properties of the resin.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Jan Panczak, Pawel Kosakowski, Adam Zakrzewski
Summary: Fossil resins are composed of organic compounds, predominantly terpenes, which can provide information about the ancestors and paleoenvironmental conditions. Specific compounds serve as biomarkers to identify the source and classify the ancient plants. Environmental biomarkers can also offer insights into the paleoenvironment during resin deposition.
EARTH-SCIENCE REVIEWS
(2023)
Article
Materials Science, Ceramics
Maria Chromcikova, Roman Svoboda, Beata Pecusova, Branislav Hruska, Miroslava Hujova, Aleksandra Nowicka, Marek Liska
Summary: Differential scanning calorimetry, thermomechanical analysis and Raman spectroscopy were used to investigate the structural relaxation phenomena in Li-doped 45S5 Bioglass with the presence of Li2O and P2O5 oxides. The study revealed similar glass transition behavior for the enthalpy and volume manifestations of relaxation motions. The Tool-Narayanaswamy-Moynihan (TNM) model was applied and the simulation-comparative methodology was used to determine the model relaxation parameters. The results showed no significant correlation between the TNM model parameters and the synthesized glass composition. However, a strong correlation was found between various physico-chemical properties related to glass transition kinetics and the content of Q(Si)(2) species responsible for chain-like structure formation in the glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Pharmacology & Pharmacy
Tigran Kharatyan, Shunya Igawa, Srikanth R. Gopireddy, Toru Ogawa, Tatsuhiro Kodama, Regina Scherlie, Nora A. Urbanetz
Summary: This study investigates the impact of post-freeze annealing on the volume of lyophilisates. Sucrose and trehalose solutions were freeze-dried with different annealing conditions and the resulting lyophilisates were analyzed. The external structure of the lyophilisates was found to be dependent on the bulk materials and choice of vials, while the volume was influenced by the annealing time and temperature. Understanding the volume change of lyophilisates, in combination with material properties such as glass transition temperature, forms the basis for relating physicochemical properties to process parameters in lyophilization.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Multidisciplinary Sciences
Tiffany S. Slater, Shosuke Ito, Kazumasa Wakamatsu, Fucheng Zhang, Peter Sjovall, Martin Jarenmark, Johan Lindgren, Maria E. McNamara
Summary: The authors present a chemical taphonomy model for fossil melanins based on experimental data obtained from extant bird feathers, which predicts the composition of fossil melanins and provides evidence for the molecular preservation of phaeomelanin in 10 million year old frogs.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Yuan-Zheng Zhao, Yan Chu, Ying-Jun Xu, Ping Zhu, Yu-Zhong Wang
Summary: In this study, a liquid phosphorus-containing 1-vinylimidazole salt (VC) was synthesized and used as a flame-retardant crosslinking agent for vinyl ester resins (VER). The addition of 15% VC significantly improved the flame retardancy of the resin, achieving UL 94 V0 rating and a limiting oxygen index of 32.7%. VC15/VER also showed reduced heat release rate, total heat release rate, and total smoke release rate compared to VER. It exhibited good thermal stability and high mechanical performance comparable to VER, making it suitable for various applications such as coatings, composites, and laminates.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Chunliang Li, Mats Johansson, Paul Buijsen, Gert Dijkstra, Rafael J. Sablong, Cor E. Koning
Summary: The evaluation of poly(limonene carbonate)s derived from orange oils and carbon dioxide as UV-curable coating binders showed fast curing and quick thiol-ene network formation. The UV-cured powder coating employing these PLCs exhibited outstanding properties such as high transparency, good acetone resistance, high pencil hardness and high Konig hardness, indicating their potential as promising biobased alternatives to conventional powder coating resins.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Multidisciplinary
Joanna Pagacz, Beata Naglik, Pawel Stach, Przemyslaw Drzewicz, Lucyna Natkaniec-Nowak
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Biochemistry & Molecular Biology
Dawid Kucharski, Przemyslaw Drzewicz, Grzegorz Nalecz-Jawecki, Kamila Mianowicz, Artur Skowronek, Joanna Giebultowicz
Correction
Materials Science, Multidisciplinary
Joanna Pagacz, Beata Naglik, Pawel Stach, Przemyslaw Drzewicz, Lucyna Natkaniec-Nowak
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Geochemistry & Geophysics
Pawel Stach, Lucyna Natkaniec-Nowak, Marian Wagner, Magdalena Dumanska-Slowik, Maja Mroczkowska-Szerszen, Aleksandra Weselucha-Birczynska, Przemyslaw Drzewicz, Carlos George, Edwin Garcia
Article
Environmental Sciences
Maciej Thomas, Przemyslaw Drzewicz, Angelika Wieckol-Ryk, Balamurugan Panneerselvam
Summary: Treatment of carwash wastewater with potassium ferrate (VI) under optimized conditions (pH 3.5, 0.328 g/L K2FeO4, 48 min) resulted in significant reduction of chemical oxygen demand (70.3%), total organic carbon (58.9%), total nitrogen (73.3%), total phosphorus (82.0%), as well as improvement in odor. Compared to FeCl3, potassium ferrate (VI) was more effective in reducing bacterial counts and proteolytic bacteria.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Multidisciplinary Sciences
Pawel Stach, Lucyna Natkaniec-Nowak, Magdalena Dumanska-Slowik, Pawel Kosakowski, Beata Naglik, Przemyslaw Drzewicz, Jacek Misiak, Jaroslav Prsek, Carlos George, Ramon Elias Ramirez Gomez
Summary: This study provides a comprehensive analysis of the mineralogical and geochemical characteristics of Dominican amber-bearing sediments. The research utilized various analytical techniques to investigate the rock characteristics and organic matter sources in the study area, highlighting the influence of local geological conditions on sedimentation processes.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Maciej Thomas, Przemyslaw Drzewicz, Angelika Wieckol-Ryk, Balamurugan Panneerselvam
Summary: The study examined the impact of increased pressure and temperature on reducing COD values in landfill leachate, determining optimal treatment parameters using the Taguchi method, resulting in a reduction of color, COD, TOC, and TP by over 91%.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Geochemistry & Geophysics
Dorota Kaczor-Kurzawa, Irena Wysocka, Adam Porowski, Przemyslaw Drzewicz, Emilia Vassileva
Summary: This study describes the occurrence and distribution of rare earth elements (REEs) in mineral and thermal waters in the Quaternary, Mesozoic, and Permian aquifers of the Polish Lowlands. The study found that the groundwater samples had low concentrations of REEs and showed different patterns of REE distribution. This provides insights into the fractionation of REEs between water and rocks and the basic hydrogeochemical processes shaping the chemistry of waters.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Biochemistry & Molecular Biology
Dawid Kucharski, Robert Stasiuk, Przemyslaw Drzewicz, Artur Skowronek, Agnieszka Strzelecka, Kamila Mianowicz, Joanna Giebultowicz
Summary: Organotin compounds (OTCs) are hazardous substances in the marine environment, and can be determined by different methods. The ISO 23161 method and the QuEChERS LC-MS/MS method have not been compared for the determination of OTCs in bottom sediments. The QuEChERS LC-MS/MS method is more environmentally friendly and less prone to interferences compared to ISO 23161, and it is suitable for fast and reliable monitoring of OTCs in bottom sediments, but further development is needed for the determination of di- and monobutyltin.
Article
Environmental Sciences
Dawid Kucharski, Grzegorz Nalecz-Jawecki, Przemyslaw Drzewicz, Artur Skowronek, Kamila Mianowicz, Agnieszka Strzelecka, Joanna Giebultowicz
Summary: The occurrence of 130 pharmaceutically active compounds (PhACs) in sediments collected from the Odra River estuary was investigated. The compounds had the highest concentration levels near two main wastewater treatment plants and the seaport and shipyard. Pseudoephedrine, clindamycin, nalidixic acid, carbamazepine, fexofenadine, propranolol, and thiabendazole posed the highest environmental risks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biochemistry & Molecular Biology
Miroslaw Kasprzak, Agnieszka Szablowska, Agata Kurzyk, Paulina Tymowicz-Grzyb, Adrian Najmrodzki, Anna Wozniak, Agnieszka Antosik, Joanna Pagacz, Piotr Szterner, Andrzej Plichta, Piotr Wiecinski, Paulina Rusek-Wala, Agnieszka Krupa, Przemyslaw Plocinski, Karolina Rudnicka, Monika Biernat
Summary: Composites based on PLA and HA were prepared using a thermally induced phase separation method. The degradation and pore size distribution of the composites were affected by the preparation, sterilization, and incubation processes, as well as the addition of HA. The inclusion of HA reduced the degradation of PLA and showed no cytotoxicity, indicating its potential for biomedical applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Dawid Kucharski, Joanna Giebultowicz, Agata Drobniewska, Grzegorz Nalecz-Jawecki, Artur Skowronek, Agnieszka Strzelecka, Kamila Mianowicz, Przemys Law Drzewicz
Summary: This is the first comprehensive study on the occurrence of tributyltin (TBT) in the Odra River estuary. The results show that TBT is still present in the bottom sediments and the main source of contamination is likely related to the maritime industry. Environmentally friendly methods are needed for ship maintenance and management of sediment pollutants.
Article
Biochemistry & Molecular Biology
Monika Biernat, Aleksandra Szwed-Georgiou, Karolina Rudnicka, Przemyslaw Plocinski, Joanna Pagacz, Paulina Tymowicz-Grzyb, Anna Wozniak, Marcin Wlodarczyk, Mateusz M. Urbaniak, Agnieszka Krupa, Paulina Rusek-Wala, Natalia Karska, Sylwia Rodziewicz-Motowidlo
Summary: This study investigates a novel two-step modification strategy to improve the compatibility and mechanical strength of composite materials for bone regeneration. The modified composite shows promising potential for biomedical engineering applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Crystallography
Piotr Szterner, Agnieszka Antosik, Joanna Pagacz, Paulina Tymowicz-Grzyb
Summary: Different morphologies of hydroxyapatite (HAp) were synthesized by decomposing calcium lactate pentahydrate chelates with dipotassium hydrogen phosphate under hydrothermal conditions. The technique allows for precise control of HAp crystals morphology and product purity, which are essential for biomedical applications. By optimizing the synthesis parameters, hydroxyapatite with whiskers, hexagonal rods, nanoparticles, flowers, and cylinders shapes were obtained.
