A5005498732- Advanced NMR Techniques and Applications
- NMR spectroscopy and applications
- Advanced MRI Techniques and Applications
- Atomic and Subatomic Physics Research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Concrete and Cement Materials Research
- Quantum, superfluid, helium dynamics
- Advanced Neuroimaging Techniques and Applications
- Wood Treatment and Properties
- Solid-state spectroscopy and crystallography
- Lignin and Wood Chemistry
- Magnesium Oxide Properties and Applications
- Aerogels and thermal insulation
- Building materials and conservation
- Advanced Cellulose Research Studies
- Zeolite Catalysis and Synthesis
- Recycling and utilization of industrial and municipal waste in materials production
- Magnetism in coordination complexes
- Fermentation and Sensory Analysis
- Microfluidic and Capillary Electrophoresis Applications
- Material Dynamics and Properties
- Enzyme-mediated dye degradation
- Hydrocarbon exploration and reservoir analysis
- Cultural Heritage Materials Analysis
University of Oulu
2016-2025
University of California, Berkeley
2008
University of Helsinki
2002
KTH Royal Institute of Technology
2002
Abstract Distributions of nuclear magnetic resonance (NMR) relaxation times provide detailed information about the moisture absorbed in wood. In this work, T 2 *, , and 1 distributions were recorded from fresh sapwood heartwood samples pine ( Pinus sylvestris ) spruce Picea abies at various temperatures. Below melting point bulk water, free water is frozen its signal disappears distributions. Then, low-temperature unfrozen bound contain more components, because large peaks hiding some...
Abstract Traditional nuclear magnetic resonance (NMR) spectroscopy relies on the versatile chemical information conveyed by spectra. To complement conventional NMR, Laplace NMR explores diffusion and relaxation phenomena to reveal details molecular motions. Under a broad concept of ultrafast multidimensional here we introduce an diffusion-relaxation correlation experiment enhancing resolution content corresponding 1D experiments as well reducing time one two orders magnitude or more compared...
We report 129Xe NMR experiments showing that a Fe4L6 metallosupramolecular cage can encapsulate xenon in water with binding constant of 16 M–1. The observations pave the way for exploiting cages as economical means to extract rare gases well NMR-based bio-, pH, and temperature sensors. Xe has an unusual chemical shift downfield from free water. exchange rate between encapsulated was determined be about 10 Hz, potentially allowing signal amplification via saturation transfer. Computational...
The next generation of green insulation materials is being developed to provide safer and more sustainable alternatives conventional materials. Bio-based cellulose nanofiber (CNF) aerogels offer excellent thermal properties; however, their high flammability restricts application. In this study, the design concept for development a multifunctional non-toxic material inspired by natural composition seaweed, comprising both alginate cellulose. approach includes three steps: first, CNFs were...
Progress in new sustainable technologies depends on the development of battery materials, specifically safer, low-cost, and higher energy density batteries. One type materials are halide solid electrolytes (HSEs), which have been shown to exhibit high ionic conductivity, deformability, oxidative stability. Here, synthesis Li3InCl6 (LIC) HSEs by ball-milling followed dry room annealing is investigated. Crystal structure, particle size, conductivity analyzed using a combination X-ray...
Converting industrial residual lignin into monophenolic compounds remains a formidable challenge within biorefinery processes, especially when dealing with highly polymerized lignin. This study focuses on the depolymerization of softwood enzyme hydrolysis (SEHL), by-product bioethanol production, which possesses substantial molar mass (M̅w ˃ 10000 g/mol), The approach involves utilizing acidic or alkaline deep eutectic solvent (DES) for pre-depolymerization, followed by rapid pyrolysis,...
Protein–ligand interactions can be detected by observing changes in the transverse relaxation rates of ligand upon binding. The ultrafast NMR technique, which correlates chemical shift with rate, allows for simultaneous acquisition R2 carbon spins at different positions. In combination dissolution dynamic nuclear polarization (D-DNP), where signal intensity is enhanced thousands times, values several signals from unlabeled benzylamine are observable within a single scan. hyperpolarized...
Thermal modification is an environmentally friendly method to increase the lifetime and improve properties of timber. In this work, we investigate absorption moisture in thermally modified pine wood (Pinus sylvestris) immersed water using various nuclear magnetic resonance (NMR) methods. Magnetic images (MRI) visualize spatial distribution absorbed free water. Spin–echo spectra measured both below above 0 °C reveal that thermal partially blocks access cell walls; even at 180 slightly reduces...
This study aims to examine the characteristics of two solid lignin fractions isolated from wheat straw using alkaline and acidic deep eutectic solvents (DESs). The chemical properties morphological were evaluated by measuring their purity, elemental composition, molecular weight particle size distributions, microstructure. Their structure was DRIFT (diffuse reflectance infrared Fourier transform) spectroscopy, GPC (gel permeation chromatography), TGA (thermogravimetric analysis), 13C NMR...
This paper focuses on the development of high-strength and eco-friendly one-part (i.e., dry-mix) alkali-activated mortar with ground granulated blast furnace slag as main precursor. In addition to slag, phyllite dust silica fume were used co-binders in binary ternary blends improve mechanical properties. Particle packing optimization was employed for mix proportioning achieve a compact matrix skeleton. The results revealed that 10% increase strength gained after adjusting particle an...
Geopolymers are emerging construction materials with lower carbon dioxide emissions compared to the conventional cementitious materials. The knowledge of curing process and related pore structures important for optimizing properties these different applications. final structure sensitive amount used water, however specifics unclear. metakaolin-based geopolymers a narrow water-to-solid (w/s) ratio (0.59–0.66) were monitored by nuclear magnetic resonance (NMR) relaxometry cryoporometry. 14-day...
The retardant effects of citric acid on the properties ettringite binders are not yet fully understood. This investigation provides insights into both fresh and hardened state binder produced from hydration between ladle slag gypsum (LSG). results revealed that LSG's initial setting time could be controlled via different contents range 20 min to 2 h. Citric is effective at relatively high dosages; in its absence, formed almost immediately directly following exposure water. presence alters...
Abstract Thermally modified wood (TMW) is widely used in outdoor applications due to its advanced properties towards weathering stresses. Although the structure changes of TMW from weather factors have been reported, investigation quantitative analysis water states and cell wall after limited. In this work, amount bound water, fiber saturation point (FSP), pores, free distribution thermally Scots pine, Norway spruce, European ash were measured before a 2-year natural via NMR relaxometry,...
Aluminosilicate glasses are materials with a wide range of technological applications. The field strength non-frameworknetwork-modifying cations strongly influences the structure aluminosilicate and their suitability for various In this work, we study influence on ((Na2O)1-x(MgO)x(Al2O3)0.25(SiO2)1.25) glasses. Due to higher cation magnesium than sodium, prefers role network modifier, while sodium preferentially acts as charge compensator. When replaces Q3 silicon species converted into Q2...
Abstract The exchange of molecules between different physical or chemical environments due to diffusion transformations has a crucial role in plethora fundamental processes such as breathing, protein folding, reactions and catalysis. Here, we introduce method for single-scan, ultrafast NMR analysis molecular based on the coefficient contrast. shortens experiment time by one four orders magnitude. Consequently, it opens way high sensitivity quantification important transient cellular...
Guest capture and release are important properties of self-assembling nanostructures. Over time, a significant fraction guests might engage in short-lived states with different symmetry stereoselectivity transit frequently between multiple environments, thereby escaping common spectroscopy techniques. Here, we investigate the cavity an iron-based metal organic polyhedron (Fe-MOP) using spin-hyperpolarized
Abstract One-part alkali-activated materials prepared with solid-form alkali activator are gaining attention in the construction industry, as they an easier and safer approach for cast-in-situ applications comparison two-part (i.e., involving use of alkali-activator solutions). The present study compares one-part conventional mixing methods two aluminosilicate precursors, metakaolin ground granulated blast-furnace slag, using identical mix designs (in terms molar ratios SiO 2 , Al O 3 Na O)...
This paper reports on the synthesis and characteristics of a novel aluminosilicate glass-based cementitious binder. We investigated hydration kinetics, degree reaction, phase assemblage glass via XRD, DTG, 27Al 29Si MAS NMR, FTIR, SEM/EDS thermodynamic modelling. The exhibits hydraulic properties in which binder developed impressive compressive strength at early age. main products are an intermixed Na and/or Al incorporated C–S–H gel. Hydrotalcite precipitated with slower rate thus may...
Characterizing and understanding the mechanisms underlying geopolymerization are critical in achieving use of sustainable construction material, geopolymer, for widespread commercial production. Non-destructive 1H NMR relaxometry can provide novel information about as it allows simultaneous detection where water goes how pore structure changes. Coupled with development single-sided devices, measurements not limited by specimen size therefore able to observe in-situ conditions geopolymer...
Various amorphous multi-oxide silicates can be used as a precursor for cementitious binders. However, their dissolution kinetics are often slow and further inhibited by ions adsorbed on surfaces. Organic ligands complexing agents could enhance extent of dissolution. Here, the effect 3,4-dihydroxybenzoic acid (DHBA) with 1 mM concentration early-stage blast furnace slag basaltic glass was investigated at pH 12–14. DHBA impacted depending composition raw material. Liquid-state 13C 1H NMR...