TY - JOUR A1 - Adorjan, I. A1 - Rosenau, Th. A1 - Potthast, A. A1 - Kosma, P. A1 - Mereiter, K. A1 - Pauli, Jutta A1 - Jäger, Christian T1 - Crystal and molecular structure of methyl 4-O-methyl-beta-D-ribo-hex-3-ulopyranoside JF - Carbohydrate research N2 - Methyl 4-O-methyl-?-Image-ribo-hex-3-ulopyranoside (2), a model compound for partially oxidized anhydroglucose units in cellulose, was crystallized from CHCl3/n-hexane by vapor diffusion to give colorless plates. Crystal structure determination revealed the monoclinic space group P21 with Z=2C8H14O6 and unit cell parameters of a=8.404(2), b=4.5716(10), c=13.916(3) Å, and ?=107.467(4)°. The structure was solved by direct methods and refined to R=0.0476 for 1655 reflections and 135 parameters. The hexulopyranoside occurs in a distorted chair conformation. Both hydroxyls are involved in hydrogen bonding and form zigzag bond chains along the b-axis. One of the two hydrogen bonds is bifurcated. The solid-state 13C NMR spectrum of 2 exhibits eight carbon resonances, with well-separated signals for the two methoxyls (1-OMe: 55.72 ppm, 4-OMe: 61.25 ppm) and a keto resonance with relatively large downfield shift (206.90 ppm). Differences in the C-4 and the methoxyls’ chemical shifts in the solid and liquid states were found KW - Crystal structure KW - Solid-state NMR KW - Cellulose KW - Carbonyl groups PY - 2004 DO - https://doi.org/10.1016/j.carres.2004.01.006 SN - 0008-6215 SN - 1873-426X VL - 339 IS - 4 SP - 795 EP - 799 PB - Elsevier CY - Amsterdam AN - OPUS4-5341 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Berger, Anka A1 - Krause, Ulrich T1 - Investigations on the self-ignition of deposits containing combustibles JF - Fire and materials N2 - Self-ignition of deposited combustibles is a possible reason for excessive fires occurring on deposits for recycling materials or on waste dumps. Two series of experiments were performed to assess the hazard of self-ignition: hot storage tests with different homogeneous mixtures of combustible material and inert material and tests with pockets of combustible material embedded in inert matter. In the first test series considerable exothermicity (ΔT>60K) was observed for mass fractions of combustible material as low as 2.5%. In the second series it could be shown that the heat transfer from a pocket of burning material through the inert matter can ignite a second pocket of combustible matter. Based on the experimental data, numerical simulations were performed to predict self-ignition on real-scale waste deposits. For a deposit of specific size and shape, the influence of the ambient temperature on the occurrence of self-ignition has been investigated. KW - Self-ignition KW - Hot storage tests KW - Cellulose KW - Municipal solid waste KW - Numerical simulations PY - 2008 DO - https://doi.org/10.1002/fam.966 SN - 0308-0501 SN - 1099-1018 VL - 32 IS - 4 SP - 231 EP - 248 PB - Heyden CY - London AN - OPUS4-17577 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gotor, Raúl A1 - Bell, Jérémy A1 - Rurack, Knut T1 - Tailored fluorescent solvatochromic test strips for quantitative on-site detection of gasoline fuel adulteration JF - Journal of Materials Chemistry C N2 - Gasoline adulteration is a frequent problem world-wide, because of the chance of quick, maximized profits. However, addition of cheaper ethanol or hydrocarbons like kerosene does not only result in economic damage but also poses problems for vehicles and the environment. To enable law enforcement forces, customers or enterprises to uncover such a fraudulent activity directly upon suspicion and without the need to organize for sampling and laboratory analysis, we developed a simple strip-based chemical test. Key to the favorable performance was the dedicated materials tailoring, which led to test strips that consisted of a cellulose support coated with silica, passivated with hexamethyldisilazane and functionalized covalently with a molecular probe. The probe fluoresces brightly across a broad solvent polarity range, enabling reliable quantitative measurements and data analysis with a conventional smartphone. The assays showed high reproducibility and accuracy, allowing not only for the detection of gasoline adulteration but also for the on-site monitoring of the quality of commercial E10 gasoline. KW - Gasoline KW - Adulteration KW - Test strips KW - Benzin KW - Teststreifen KW - Fluorescence KW - Cellulose KW - Zellulose KW - Fluoreszenz PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-479231 UR - https://pubs.rsc.org/en/content/articlelanding/2019/tc/c8tc04818e DO - https://doi.org/10.1039/C8TC04818E SN - 2050-7526 VL - 7 IS - 8 SP - 2250 EP - 2256 PB - Royal Society of Chemistry CY - London, UK AN - OPUS4-47923 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Juntaro, J. A1 - Pommet, M. A1 - Kalinka, Gerhard A1 - Mantalaris, A. A1 - Shaffer, M.S.P. A1 - Bismarck, A. T1 - Creating Hierarchical Structures in Renewable Composites by Attaching Bacterial Cellulose onto Sisal Fibers JF - Advanced materials KW - Nanotubes KW - Cellulose KW - Polymer KW - Interface KW - Hierarchical Structures PY - 2008 DO - https://doi.org/10.1002/adma.200703176 SN - 0935-9648 SN - 1521-4095 VL - 20 IS - 16 SP - 3122 EP - 3126 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-18258 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mackie, I.D. A1 - Röhrling, J. A1 - Gould, R.O. A1 - Pauli, Jutta A1 - Jäger, Christian A1 - Walkinshaw, M. A1 - Potthast, A. A1 - Rosenau, Th. A1 - Kosma, P. T1 - Crystal and molecular structure of methyl 4-O-methyl-beta-D-glucopyranosyl-(1->4)-beta-D-glucopyranoside JF - Carbohydrate research N2 - The cellulose model compound methyl 4-O-methyl-?-Image-glucopyranosyl-(1?4)-?-Image-glucopyranoside (6) was synthesised in high overall yield from methyl ?-Image-cellobioside. The compound was crystallised from methanol to give colourless prisms, and the crystal structure was determined. The monoclinic space group is P21 with Z=2 and unit cell parameters a=6.6060 (13), b=14.074 (3), c=9.3180 (19) Å, ?=108.95(3)°. The structure was solved by direct methods and refined to R=0.0286 for 2528 reflections. Both glucopyranoses occur in the 4C1 chair conformation with endocyclic bond angles in the range of standard values. The relative orientation of both units described by the interglycosidic torsional angles [? (O-5?---C-1?---O-4---C-4) -89.1°, phi (C-1?---O-4---C-4---C-5) -152.0°] is responsible for the very flat shape of the molecule and is similar to those found in other cellodextrins. Different rotamers at the exocyclic hydroxymethyl group for both units are present. The hydroxymethyl group of the terminal glucose moiety displays a gauche–trans orientation, whereas the side chain of the reducing unit occurs in a gauche–gauche conformation. The solid state 13C NMR spectrum of compound 6 exhibits all 14 carbon resonances. By using different cross polarisation times, the resonances of the two methyl groups and C-6 carbons can easily be distinguished. Distinct differences of the C-1 and C-4 chemical shifts in the solid and liquid states are found. KW - Crystal structure KW - Cellulose KW - Methyl cellobioside KW - Solid state NMR PY - 2002 DO - https://doi.org/10.1016/S0008-6215(01)00299-3 SN - 0008-6215 SN - 1873-426X VL - 337 IS - 2 SP - 161 EP - 166 PB - Elsevier CY - Amsterdam AN - OPUS4-11023 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Malz, Frank A1 - Yoneda, Y. A1 - Kawada, T. A1 - Mereiter, K. A1 - Kosma, P. A1 - Rosenau, T. A1 - Jäger, Christian T1 - Synthesis of methyl 4'-O-methyl-beta-D-cellobioside-13C12 from D-glucose-13C6. Part 2: Solid-state NMR studies JF - Carbohydrate research KW - Cellodextrins KW - Cellulose KW - Model compounds KW - Solid-state NMR KW - Glycosidic bond KW - C-13 isotopic labeling PY - 2007 SN - 0008-6215 SN - 1873-426X VL - 342 IS - 1 SP - 65 EP - 70 PB - Elsevier CY - Amsterdam AN - OPUS4-14450 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nerger, Tino A1 - Neumann, Patrick P. A1 - Weller, Michael G. T1 - Passive Smart Dust zur Erkennung gefährlicher Stoffe N2 - Einsatz/Verteilung kostengünstiger und umweltfreundlicher Partikel als passive Sensoren und optische Detektion per Kamerasystem. Die einfache Modifikation chemischen Farbstoffe auf der Partikeloberfläche liefert eine optisch quantifizierbare Reaktion und Rückschlüsse auf die Zielsubstanzen. T2 - Lange Nacht der Wissenschaften @ BAM 2023 CY - Berlin, Germany DA - 17.06.2023 KW - Passive Smart Dust KW - Drohne KW - Kolorimetrische Sensoren KW - Cellulose PY - 2023 AN - OPUS4-58140 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nerger, Tino A1 - Neumann, Patrick P. A1 - Weller, Michael G. T1 - Passive Smart Dust Localization of Hazardous Chemicals N2 - Use/distribution of cost-effective and biocompatible pieces of cellulose paper as passive optical chemosensors and readout by the camera system. Modification of the paper surface using various chemically sensitive dyes (indicators) provides an optically detectable reaction and conclusions about the target substances and precise location. T2 - 2024 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN) CY - Grapevine, Texas, USA DA - 12.05.2024 KW - Indicator KW - Passive Smart Dust KW - Drone KW - Colorimetric Sensor KW - Cellulose KW - Confetti PY - 2024 AN - OPUS4-60175 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nerger, Tino A1 - Neumann, Patrick P. A1 - Weller, Michael G. T1 - Drone-based Localization of Hazardous Chemicals by Passive Smart Dust T2 - 2024 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN) Proceedings N2 - We introduce a passive smart dust concept as a novel solution for environmental monitoring. Utilizing chemical reagents like colorimetric indicators and other chemosensors, these particles detect varying environmental conditions. We developed paper-based sensors that are both cost-effective and eco-friendly. In practical tests, these sensors, dispersed over a designated area, successfully identified hazardous substances by changing their color when exposed to acids or bases. This color change was remotely detectable using a drone-mounted color camera. The data thus obtained was processed through specialized software, accurately pinpointing areas of contamination. This method proves the efficacy and scalability of passive smart dust technology for real-time, environmentally sustainable remote sensing of hazardous materials T2 - 2024 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN) CY - Grapevine, Texas, USA DA - 12.05.2024 KW - Indicator KW - Passive Smart Dust KW - Colorimetric Sensor KW - Drone KW - Cellulose KW - Environmental Monitoring KW - Confetti KW - Hazard Detection PY - 2024 SN - 979-8-3503-7053-9 VL - 1 SP - 1 EP - 3 PB - IEEE CY - Piscataway, NJ 08855-1331 USA AN - OPUS4-60176 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Palantöken, Sinam A1 - Bethke, K. A1 - Zivanovic, V. A1 - Kneipp, Janina A1 - Rademann, Klaus A1 - Kalinka, Gerhard T1 - Cellulose hydrogels physically crosslinked by glycine: Synthesis, characterization, thermal and mechanical properties JF - Journal of Applied Polymer Science N2 - Biopolymers are very efficient for significant applications ranging from tissue engineering, biological devices to water purification. There is a tremendous potential value of cellulose because of ist being the most abundant biopolymer on earth, swellability, and functional groups to be modified. A novel, highly efficient route for the fabrication of mechanically stable and natural hydrogels is described in which cellulose and glycine are dissolved in an alkaline solution of NaOH and neutralized in an acidic solution. The dissolving temperature and the glycine amount are essential parameters for the self-assembly of cellulose chains and for Tuning the morphology and the aggregate structures of the resulting hydrogels. Glycine plays the role of a physical crosslinker based on the Information obtained from FTIR and Raman spectra. Among the prepared set of hydrogels, CL5Gly30 hydrogels have the highest capacity to absorb water. The prepared CL5Gly30 gels can absorb up to seven times their dry weight due to its porous 3-D network structure. CL5Gly10 hydrogel exhibits 80% deformation under 21 N force executed. The method developed in this article can contribute to the application of heavy metal adsorption in aqueous solutions for water purification and waste management. KW - Biopolymer KW - Cellulose KW - Hydrogel KW - Natural KW - Synthesis PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-486845 DO - https://doi.org/10.1002/APP.48380 SN - 1097-4628 SN - 0021-8995 VL - 136 SP - 48380, 1 EP - 11 PB - Wiley CY - USA AN - OPUS4-48684 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -