Niels Chr. Nielsen
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View article: Selective mineral recovery from seawater by ion-exchangeable metal-organic framework glasses
Selective mineral recovery from seawater by ion-exchangeable metal-organic framework glasses Open
The transition to clean energy and sustainable technologies necessitates securing precious metals, yet traditional land-based mining is increasingly unsustainable. Seawater holds immense potential as a mineral source, but its intricate ion…
View article: Selective mineral recovery from seawater by metal-organic framework glasses
Selective mineral recovery from seawater by metal-organic framework glasses Open
The transition to clean energy and sustainable technologies necessitates securing precious metals, yet traditional land-based mining is increasingly unsustainable. Seawater holds immense potential as a mineral source, but its intricate ion…
View article: Repurposing polyethylene terephthalate plastic waste to capture carbon dioxide
Repurposing polyethylene terephthalate plastic waste to capture carbon dioxide Open
Polyethylene terephthalate (PET) is a ubiquitous polymer with a lack of viable waste management solutions besides mechanical recycling, incineration, and landfilling. Herein, we demonstrate a chemical upcycling of PET waste into materials …
View article: Continuous structure modification of metal-organic framework glasses via halide salts
Continuous structure modification of metal-organic framework glasses via halide salts Open
View article: Noncanonical Rh(0)/Rh(I) catalysis enables redox-neutral epoxy depolymerisation in water
Noncanonical Rh(0)/Rh(I) catalysis enables redox-neutral epoxy depolymerisation in water Open
High performance epoxy composites are key materials for wind energy, aeronautical engineering, and other structurally demanding applications. The crosslinked epoxy polymers are highly durable with enclosed carbon or glass fibres defining t…
View article: Continuous structure modification of metal- organic framework glasses via halide salts
Continuous structure modification of metal- organic framework glasses via halide salts Open
Melting and glass formation of metal-organic frameworks (MOFs) allow them to be processed into bulk materials. However, two major challenges remain: only a small fraction of MOF crystals undergo melting and glass-formation, and no well-est…
View article: Bridging DNP and MAS NMR dipolar recoupling -- from static single crystal to spinning powders
Bridging DNP and MAS NMR dipolar recoupling -- from static single crystal to spinning powders Open
Spin engineering of advanced pulse sequences has had a transformative impact on the development of nuclear magnetic resonance (NMR) spectroscopy, to an extending degree also electron paramagnetic resonance (EPR), and the hybrid between the…
View article: Increased sensitivity in electron–nuclear double resonance spectroscopy with chirped radiofrequency pulses
Increased sensitivity in electron–nuclear double resonance spectroscopy with chirped radiofrequency pulses Open
Electron–nuclear double resonance (ENDOR) spectroscopy is an EPR technique to detect the nuclear frequency spectra of hyperfine coupled nuclei close to paramagnetic centers, which have interactions that are not resolved in continuous wave …
View article: CO2 capture with post-modified consumer acrylonitrile plastics
CO2 capture with post-modified consumer acrylonitrile plastics Open
Carbon capture and storage (CCS) is considered an indispensable tool for abating climate change caused by human activity. With annual CO2-emissions exceeding 37 gigatons, there is an urgent need for accessing sorbents on a million-ton prod…
View article: CO2 Capture with Post-Modified Nitrile- and Styrene Butadiene Rubbers
CO2 Capture with Post-Modified Nitrile- and Styrene Butadiene Rubbers Open
View article: Transition metal transporting P‐type <scp>ATPases</scp> : terminal metal‐binding domains serve as sensors for autoinhibitory tails
Transition metal transporting P‐type <span>ATPases</span> : terminal metal‐binding domains serve as sensors for autoinhibitory tails Open
Copper is an essential micronutrient and yet is highly toxic to cells at elevated concentrations. P 1B ‐ATPase proteins are critical for this regulation, providing active extrusion across cellular membranes. One unique molecular adaptation…
View article: Observation of dynamic nuclear polarization echoes
Observation of dynamic nuclear polarization echoes Open
It is demonstrated that the time evolution of the electron-nuclear polarization transfer process during pulsed dynamic nuclear polarization (DNP) can be reversed on a microsecond timescale, leading to the observation of DNP echoes. The DNP…
View article: Increased sensitivity in Electron Nuclear Double Resonance spectroscopy with chirped radiofrequency pulses
Increased sensitivity in Electron Nuclear Double Resonance spectroscopy with chirped radiofrequency pulses Open
Electron Nuclear Double Resonance (ENDOR) spectroscopy is an EPR technique to detect the nuclear frequency spectra of hyperfine coupled nuclei close to paramagnetic centres, which have interactions that are not resolved in continuous wave …
View article: Exploring the intensified catalytic role of biochar in facilitating advanced oxidation of tebuconazole
Exploring the intensified catalytic role of biochar in facilitating advanced oxidation of tebuconazole Open
View article: Dynamic Nuclear Polarization Pulse Sequence Engineering using Single-Spin Vector Effective Hamiltonians
Dynamic Nuclear Polarization Pulse Sequence Engineering using Single-Spin Vector Effective Hamiltonians Open
Dynamic nuclear polarization (DNP) has proven to be a powerful technique to enhance nuclear spin polarization by transferring the much higher electron spin polarization to the nuclear spins prior to detection. While major attention has bee…
View article: Dynamic Nuclear Polarization Pulse Sequence Engineering using Single-Spin Vector Effective Hamiltonians
Dynamic Nuclear Polarization Pulse Sequence Engineering using Single-Spin Vector Effective Hamiltonians Open
Dynamic nuclear polarization (DNP) has proven to be a powerful technique to enhance nuclear spin polarization by transferring the much higher electron spin polarization to the nuclear spins prior to detection. While major attention has bee…
View article: Continuous structure modification of metal- organic framework glasses via halide salts
Continuous structure modification of metal- organic framework glasses via halide salts Open
Melting and glass formation of metal-organic frameworks (MOFs) allow them to be processed into bulk materials. However, two major challenges remain: only a small fraction of MOF crystals undergo melting and glass-formation, and no well-est…
View article: Observation of Dynamic Nuclear Polarization Echoes
Observation of Dynamic Nuclear Polarization Echoes Open
It is demonstrated that the time evolution of the electron-nuclear polarization transfer process during pulsed dynamic nuclear polarization (DNP) can be reversed on a microsecond timescale, leading to the observation of DNP echoes. The DNP…
View article: Poly(Sitosterol)‐Based Hydrophobic Blocks in Amphiphilic Block Copolymers for the Assembly of Hybrid Vesicles
Poly(Sitosterol)‐Based Hydrophobic Blocks in Amphiphilic Block Copolymers for the Assembly of Hybrid Vesicles Open
Amphiphilic block copolymer and lipids can be assembled into hybrid vesicles (HVs), which are an alternative to liposomes and polymersomes. Block copolymers that have either poly(sitostryl methacrylate) or statistical copolymers of sitoste…
View article: <scp>Light‐activated 3D</scp> printed <scp>fish‐like</scp> actuator
<span>Light‐activated 3D</span> printed <span>fish‐like</span> actuator Open
Hydrogel‐based actuators are innovative materials that exhibit responsive and dynamic behavior in response to external stimuli, making them promising candidates for a wide range of applications in fields such as soft robotics. We employ 3D…
View article: Water Promotes Melting of a Metal–Organic Framework
Water Promotes Melting of a Metal–Organic Framework Open
Water is one of the most reactive and abundant molecules on Earth, and it is thus crucial to understand its reactivity with various material families. One of the big unknown questions is how water in liquid and vapor forms impact the fast-…
View article: Leder: Geografisk information og uddannelse
Leder: Geografisk information og uddannelse Open
Hvordan lærte vi at arbejde med geografiske data, og hvordan kom vi i gang med og igennem en uddannelse, der satte os i stand til at skabe, strukturere, analysere og formidle geografisk information? Var det skoleatlasset eller spejdernes b…
View article: Designing broadband pulsed dynamic nuclear polarization sequences in static solids
Designing broadband pulsed dynamic nuclear polarization sequences in static solids Open
Dynamic nuclear polarization (DNP) is a nuclear magnetic resonance (NMR) hyperpolarization technique that mediates polarization transfer from unpaired electrons with large thermal polarization to NMR-active nuclei via microwave (mw) irradi…
View article: Hydropower and Fish - a Roadmap for Best Practice Management
Hydropower and Fish - a Roadmap for Best Practice Management Open
The development of a hydropower facility has, in nearly all cases, some impact on natural river flows and the wider environment. This impact often includes the effect on fish, most notably curtailment of migration routes and changes to the…
View article: Accurate analysis and perspectives for systematic design of magnetic resonance experiments using single-spin vector and exact effective Hamiltonian theory
Accurate analysis and perspectives for systematic design of magnetic resonance experiments using single-spin vector and exact effective Hamiltonian theory Open
Aimed at fundamental understanding and design of advanced magnetic resonance experiments on basis of Hamiltonians, we describe highly convergent and exact effective Hamiltonian methods which alleviate important deficits of current less acc…
View article: Chemical shielding and electric field gradient tensors of disodium 5′-adenosine triphosphate trihydrate determined by solid-state NMR spectroscopy and ab initio calculations
Chemical shielding and electric field gradient tensors of disodium 5′-adenosine triphosphate trihydrate determined by solid-state NMR spectroscopy and ab initio calculations Open
The tri-phosphate and sodium ion environments in well crystallized disodium 5′adenosine triphosphate trihydrate (ATP•3H 2O) are investigated using high-resolution solid-state NMR spectroscopy and ab initio calculations. The six …
View article: Quantification of protein and phosphorus in livestock feed using mobile NMR sensor technology
Quantification of protein and phosphorus in livestock feed using mobile NMR sensor technology Open
Low-field NMR sensor technology is proposed for accurate and operationally simple on-farm or laboratory determination of protein and phosphorus constituents in livestock feed. The total phosphorus content is determined directly on the nati…
View article: On-Site Measurement of Fat and Protein Contents in Milk Using Mobile NMR Technology
On-Site Measurement of Fat and Protein Contents in Milk Using Mobile NMR Technology Open
Robust and easy-to-use NMR sensor technology is proposed for accurate, on-site determination of fat and protein contents in milk. The two parameters are determined using fast consecutive 1H and 35Cl low-field NMR experiments on milk sample…
View article: Fast and Accurate Quantification of Nitrogen and Phosphorus Constituents in Animal Slurries Using NMR Sensor Technology
Fast and Accurate Quantification of Nitrogen and Phosphorus Constituents in Animal Slurries Using NMR Sensor Technology Open
The optimal processing of animal slurry with a minimal environmental impact either as an organic fertilizer or as an energy source for biogas production fundamentally requires accurate, fast, cost-effective, and mobile analytical technique…
View article: Imaging Rheumatoid Arthritis in Mice Using Combined Near Infrared and 19F Magnetic Resonance Modalities
Imaging Rheumatoid Arthritis in Mice Using Combined Near Infrared and 19F Magnetic Resonance Modalities Open
Rheumatoid arthritis (RA) is an autoimmune disease that causes pain and tissue destruction in people worldwide. An accurate diagnosis is paramount in order to develop an effective treatment plan. This study demonstrates that combining near…