Article
Chemistry, Analytical
Mehmet Gunes, Serkan Karakaya, Yusuf Dilgin
Summary: This work presents an effective electrochemical detection method for Sunset Yellow on a composite modified glassy carbon electrode. The modified electrode shows enhanced oxidation/reduction peaks for SSY and offers a linear response in the range of 0.50 to 256 mu M.
Article
Chemistry, Physical
Alan R. F. Lima, Ricardo C. Pereira, Joao Azevedo, Adelio Mendes, J. Sergio Seixas de Melo
Summary: An aqueous organic redox flow battery based on ARS and PF was studied in alkaline medium, revealing good electrochemical stability and performance. The system showed potential as an organic aqueous flow battery closely related to the electrochemical stability and efficiencies associated to ARS.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Aline Bernar, Jennifer Viktoria Gebetsberger, Monika Bauer, Werner Streif, Michael Schirmer
Summary: The alizarin red S assay is widely used for quantification of osteoblast mineralization. However, it has limitations in sensitivity for detecting slight effects of potentially clinically relevant substances. This study optimized the sensitivity of the staining method by increasing the mineralization ability of osteoblasts through the addition of calcium chloride or calcitonin. The results showed that only calcium chloride significantly increased mineralization, enhancing the sensitivity of the alizarin red S staining in a dose-dependent manner.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Pascal Rauthe, Kristina Sabljo, Maike Kristin Vogelbacher, Claus Feldmann, Andreas-Neil Unterreiner
Summary: This study compares the characteristics of water-soluble dye alizarin red S (ARS) nanoparticles, ARS in aqueous solution, and alizarin in DMSO using femtosecond technology. The results show slight differences in the stationary absorption spectra between nanoparticles and solution. Excitation at 530 nm leads to weak and noisy responses, and transient spectra of the nanoparticles at 267 nm were recorded. The [La(OH)(2)][ARS] nanoparticles in aqueous solution exhibit a fast relaxation process of 14 ps after excitation at 530 nm, similar to Na(ARS) solution (19 ps).
Article
Environmental Sciences
Yandi Rao, Yuxin Zhang, Aoqi Li, Tianhu Zhang, Tifeng Jiao
Summary: The composite photocatalyst G-TiO2@Fe3O4/PS, prepared with TiO2, graphite (G) and Fe3O4, showed excellent photocatalytic activity in degrading ARS under visible light, with superior efficiency and stability.
Article
Physics, Multidisciplinary
Silvia Innocenti, Marilena Ricci, Giancarlo Lanterna, Raffaella Fontana, Jana Striova, Maurizio Becucci
Summary: Identification of red lakes in painting layers by enhanced Raman spectroscopy is proposed in this study, utilizing the solubility and recrystallization of red lakes in hydrogel to isolate the lake from the painted matrix for identification purposes. This analytical method has been found effective in identifying cochineal and madder lakes, with results compared to experimental data and DFT calculations to define the organometallic complex present. The methodology is tested on aged mock-up panel paintings and historical paintings, supported by reflectance spectra and colorimetric measurements following micro-extraction.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Physical
Quanlu Wang, Huimin Song, Wenqing Li, Shuhao Wang, Lei Liu, Tingxi Li, Yongqin Han
Summary: The polypyrrole/graphene composite aerogel prepared by a one-step hydrothermal method demonstrates excellent specific capacitance and electrochemical performance, showcasing features of high flexibility and light-weight, making it suitable for wearable and portable electronics applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Gullit Deffo, Ranil Clement Tonleu Temgoua, Kevin Yemele Tajeu, Evangeline Njanja, Giscard Doungmo, Ignas Kenfack Tonle, Emmanuel Ngameni
Summary: An electrochemical sensor was prepared by modifying a glassy carbon electrode with an organoclay for the detection of diuron, with a detection limit of 0.48 μM. The sensor exhibited good sensitivity, stability, and reproducibility in detecting diuron in real samples.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Engineering, Environmental
Anjani R. K. Gollakota, Venkata Subbaiah Munagapati, Vikranth Volli, Sneha Gautam, Jet-Chau Wen, Chi-Min Shu
Summary: SSZ-13 zeolite synthesized from coal bottom ash showed optimal adsorption performance under acidic medium and room temperature conditions, with equilibrium data fitting well to Langmuir isotherm. Additionally, regeneration studies demonstrated the potential for multiple reuse cycles with sensitivity to specific eluent.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Giulia Rossella Delpiano, Davide Tocco, Luca Medda, Edmond Magner, Andrea Salis
Summary: Synthetic organic dyes are commonly used in various industrial sectors but are also harmful water pollutants. In recent years, research has focused on developing materials for the removal of dyes from water, particularly nanostructured adsorbent materials like Metal Organic Frameworks (MOFs). This study found that an iron-based Fe-BTC MOF showed good results in adsorbing alizarin red S and malachite green dyes, achieving rapid adsorption equilibrium.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Analytical
Jaime F. Martinez Suarez, Ana M. Gennaro, Maria V. Mirifico
Summary: This article aims to characterize and identify reaction intermediates and final products of cathodic electrolysis of alizarin in different solvents with supporting electrolytes, using various techniques such as CV, UV-Vis, FTIR, NMR, ESR, elemental analysis, and quantum chemical computations. The results confirm some aspects of the reaction mechanism previously published, modify some details, and provide new insights. The identification of intermediates and reaction products, such as AH-CH3 and AH-Na, supports the self-protonation reaction of AH2 center dot - and the occurrence of ion pair formation between AH2? and Na+.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Electrochemistry
Quanlu Wang, Yikun Wang, Tingting Zhang, Yanmin Wang, Qiang Zhang, Tingxi Li, Yongqin Han
Summary: Metal-organic frameworks (MOFs) are promising candidates for supercapacitors. In this study, carbon cloth/ZIF67/polypyrrole composites (CZPAs) were prepared and showed improved electrochemical performances. The synergistic effects of ZIF67 and ARS played a key role in enhancing the capacitive properties. The resulting composite exhibited high capacitance and flexibility under optimal doping conditions.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Chemical
Yan Liu, Yunfeng Guo, Manting Liu, Binbin Shan, Liangming Wang, Wei Yu, Changping Yang, Dianrong Sun
Summary: Two fluorescent dyes, ARS and CAL, were used to evaluate the marking effects on the juveniles of Acanthopagrus schlegelii. The total mortality rates of the experimental groups were significantly lower than those of control groups, and ARS showed better marking quality than CAL. Recommended marking conditions include immersion in 200 mg/L ARS dye for 24 hours.
Article
Chemistry, Analytical
Soohyeon Rho, Hyelim Kim, Daeyoung Lim, Wonyoung Jeong
Summary: This study produced moss sEMG electrodes with embroidery electrodes of various shapes and loop lengths, and optimized the electrodes based on tactile comfort and sensing performance. As the loop length of the electrode increased, MIU and Qmax increased, but SMD decreased. Impedance and sEMG detection performance showed different trends depending on the electrode type.
Article
Chemistry, Analytical
Nahida Tanjila, Mohebul Ahsan, Sami Ben Aoun, Iqbal Ahmed Siddiquey, Syed Shamsul Alam, Mohammad A. Hasnat
Summary: The electrochemically inactive As(V) was detected by estimating the interactions between Alizarin Red S (ARS) and AsO43- ions in aqueous medium. Cyclic voltammetry confirmed that the addition of As(V) reduces the diffusion coefficient of the ARS molecule. The developed method for As(V) detection showed excellent sensitivity, low detection limit, and remarkable repeatability.
JOURNAL OF ANALYTICAL CHEMISTRY
(2021)
Review
Polymer Science
Carolin Gleissner, Justus Landsiedel, Thomas Bechtold, Tung Pham
Summary: This review provides an overview of the activation and functionalization techniques for high performance polymer fibers, discussing their effects on fiber properties and potential applications. A comparison of different techniques is included to provide a better understanding of their versatility and limitations.
Article
Materials Science, Characterization & Testing
Madita Buchacher, Thomas Bechtold, Tung Pham
Summary: This study introduces an advanced method for detecting thiol content in intact keratin fibers, with the heterogeneous potentiometric back titration method being able to reliably quantify thiol concentration in the range of 6.83 to 26.17 µmol/g.
Article
Chemistry, Physical
Christian Biermaier, Phillip Petz, Thomas Bechtold, Tung Pham
Summary: Conductive textiles are important in electronics development, but their machine-washing durability is a major challenge. In this study, copper-plated polyamide 66 and cellulose fabrics were used to investigate wash ageing mechanisms. A flex tester with online resistance recording was developed and various tests were conducted. The results showed that the contribution of mechanical and chemical ageing varies depending on the substrate material. The delamination of the copper layer was found to be the main cause of fatigue, facilitated by the washing solution. A cumulative fatigue model was developed and the determination of the end of lifetime by intended use was discussed.
Article
Polymer Science
Florian Wurm, Felix Netzer, Uwe Schaeffner, Jorg Leukel, Julia Schweiss, Pham Tung, Thomas Bechtold
Summary: The aim of this study was to investigate the interface between cellulose acetate (CA) and viscose (CV) in an all-cellulosic compound and to evaluate the feasibility of hydrophobic CA-coatings on viscose fibers. The mechanical strengths of cellulose foil-CA compounds were compared to pure CA samples. The effects of CA coating on CV fibers were investigated by pretreating the fibers and determining their properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Avinash P. Manian, Felix E. Kraegeloh, Doris E. Braun, Amalid Mahmud-Ali, Thomas Bechtold, Tung Pham
Summary: The investigation focused on the selective dissolution of polyamide 66 (PA 66) from mixtures with cellulose fibers using calcium chloride-ethanol-water (CEW). The dissolved PA 66 was reprecipitated with water. The cellulose fibers were undamaged by the treatment and could effectively remove a substantial proportion of the PA 66 residues. About 80-90% of the original PA 66 in the mixtures could be recovered. Effective removal of calcium residues from the recovered PA 66 is critical to prevent changes in its melt behavior.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Electrochemistry
Noemi Aguilo-Aguayo, Jacqueline Tschannett, Avinash P. Manian, Thomas Bechtold, Manuel Scheiderbauer
Summary: This paper investigates the use of three-dimensional continuous carbon filament electrodes in a redox flow cell. The findings show that these embroidered electrodes have advantages such as low pressure drop and high mass transfer coefficient, and provide avenues for further development of 3D carbon fiber electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Christian Biermaier, Thomas Bechtold, Tung Pham
Summary: This study investigates the electroless copper deposition performance on woven cellulose fabrics. Silver seeds were printed on the fabrics, followed by electroless copper deposition. The layer formation and conductivity of coated fabrics were studied by varying the deposition time. It was found that the electrical resistance initially decreased rapidly with increasing deposition time, and then reached a plateau after 120 min. The strain sensitivity and percolation efficiency of the coated fabrics decreased as the deposition time increased. The substrate construction, such as yarn crossings, had a strong influence on the conductive performance and percolation efficiency.
Article
Chemistry, Applied
Avinash P. Manian, Sophia Mueller, Thomas Bechtold, Tung Pham
Summary: Circularity of post-consumer textile wastes should take into account the presence of dyes. Denim textiles, which are predominantly dyed with indigo, can be recycled fiber-to-fiber to reuse the dye. An analytical method using alkaline Fe(II)-complex with triethanolamine as ligand is developed to quantify the indigo content. The method allows for measurement of dye concentration, regardless of the uneven dye distribution in denim, making it suitable for indigo quantification in denim waste.
Article
Polymer Science
Michael Cordin, Avinash P. Manian, Thomas Bechtold, Tung Pham
Summary: Thermoplastic all-polymer composites, made from the same material for reinforcing fibers and matrix material, have become increasingly popular due to their potential for recycling compared to traditional composites with inorganic reinforcements. This study proposes a new preparation concept for all-polyamide composites using a hybrid yarn of polyamide-6 and polyamide-66 fibers. By embroidering the hybrid yarn in the desired direction on a polyamide-6 fabric, composites with desired reinforcing fiber orientation can be prepared, maintaining the integrity of the reinforcing and unmelted PA66 fibers embedded in a molten PA6 matrix during thermoforming at 230 degrees C. The mechanical properties of these composites, including different matrix-to-reinforcement ratios and reinforcing fiber orientations, are characterized using quasi-static and high-speed tensile tests as well as penetration tests.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Biomedical
Florian Wurm, Margit Lenninger, Astrid Mayr, Cornelia Lass-Floerl, Tung Pham, Thomas Bechtold
Summary: This study focuses on the development of a moist, adaptive and anti-microbial wound dressing using bio-based and degradable materials. The dressing demonstrates pH-dependent release of an active agent, and the size of the dressing can be adjusted to minimize exposure of healthy tissue to the active agent.
JOURNAL OF BIOMATERIALS APPLICATIONS
(2023)
Article
Acoustics
Margit Lenninger, Thomas Bechtold, Tung Pham
Summary: C.I. Sulphur Black 1 is an important dye for cellulose textiles due to its maximum colour depth at reasonable costs. In this study, pad-steam dyeing with C.I. Sulphur Black 1 was used, and the effects of an intensified washing process with ultrasonification on rub fastness were investigated. The results showed that ultrasound washing can improve the wet rub fastness of the dye.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Christian Biermaier, Carolin Gleissner, Thomas Bechtold, Tung Pham
Summary: Researchers investigated the basic mechanism of using citrate anion to fix silver species and form metal catalyst directly on textile substrates. During the particle formation process and subsequent electroless copper deposition, silver undergoes multiple oxidation state changes. Under reducing conditions, silver ions are converted to silver metal. Additionally, the thermal decomposition of silver citrate generates CO2 and hexane-2,5-dione.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Thomas Bechtold, Noemi Aguilo-Aguayo, Tung Pham
Summary: Disperse dyes are important colorants for dyeing polyester fibers, but their wastewater discharge poses an environmental burden. This study explores an alternative method of electrochemical dye reduction, and successfully demonstrates the cathodic reduction of dispersed organic dyes.
Article
Chemistry, Physical
Justus Landsiedel, Jacqueline Tschannett, Margit Lenninger, Sandra Stroj, Matthias Domke, Thomas Bechtold, Tung Pham, Noemi Aguilo-Aguayo
Summary: The study introduces the use of a siloxane interlayer as a strategy to modify the surface properties of polyamide 6.6 fabrics and improve the uniformity of copper surface coating. The application of the siloxane intermediate coating significantly enhances electrical conductivity and improves the appearance and properties of the fabrics.
SURFACES AND INTERFACES
(2023)
Article
Construction & Building Technology
Julian Konzilia, Jonas Wachter, Matthias Egger, Christoph Waltl, Thomas Froeis, Thomas Bechtold, Juergen Feix
Summary: This research investigates the manufacturing process and mechanical properties of textile reinforcements fabricated using embroidery technology. It compares the advantages of embroidery technology with other manufacturing methods and presents comprehensive test results. The study reveals that the mechanical properties of the reinforcements are influenced by the manufacturing process and demonstrates the sufficient bonding behavior of the embroidered reinforcements.