Article
Chemistry, Analytical
Bin Yuan, Zhiming Zhou, Bin Jiang, Ghulam Mustafa Kamal, Xu Zhang, Conggang Li, Xin Zhou, Maili Liu
Summary: CORDY is a novel approach for NMR spectroscopy that utilizes concentration order to separate and quantify components in complex samples, by utilizing prior information of chemical shift distribution and line shape characteristics to shrink the solution space, it generates a pseudo-two-dimensional spectrum. The combination of CORDY and DOSY (CORDY-DOSY) has been found to be more efficient in resolving molecules with similar concentrations or self-diffusion coefficients.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Katarzyna Dziubinska-Kuehn, Jared Croese, Marion Pupier, Joerg Matysik, Jasmine Viger-Gravel, Beatrice Karg, Magdalena Kowalska
Summary: Recent research has shown the direct impact of water molecules on the self-structuring of imidazolium-based ionic liquid nano-domains, as well as the influence of different water impurities on the IL network and its vacuum stability. Selective purification of targeted cavities through vacuum extraction is proposed as a novel tool to control the structural rearrangement of ionic liquid networks in the presence of water.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Sijian Zheng, Yanbin Yao, Dameng Liu, Shuxun Sang, Shiqi Liu, Meng Wang, Xiaozhi Zhou, Ran Wang, Sijie Han, Tong Liu
Summary: This article proposed an innovative methodology to quantitatively characterize the multiphase water in coals, applicable to both water-saturated and sub-saturated coals, by combining theory and experiment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sofia Marchesini, Keith R. Paton, Barry Brennan, Piers Turner, Andrew J. Pollard
Summary: Nanomaterials have a high surface-area-to-mass ratio, making surface properties crucial for product performance optimization. Characterizing nanoscale surfaces is challenging, especially in liquid dispersions, but nuclear magnetic resonance proton relaxation can quickly characterize the surface chemistry of graphitic materials.
Article
Geosciences, Multidisciplinary
D. Grombacher, L. Liu, M. P. Griffiths, M. O. Vang, J. J. Larsen
Summary: Groundwater, a critical freshwater source for billions, is increasingly stressed by climate change, pollution, and overexploitation. Surface nuclear magnetic resonance (NMR), with recent advancements, shows great promise in locating and monitoring groundwater sources efficiently and accurately, even in previously inaccessible areas. The new technique, enabled by breakthroughs in transmitter capabilities and numerical modeling, delivers significant signal enhancements for high-fidelity groundwater measurements.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Physics, Applied
Moriyoshi Haruyama, Yuki Okigawa, Mitsuhiro Okada, Hideaki Nakajima, Toshiya Okazaki, Hiromitsu Kato, Toshiharu Makino, Takatoshi Yamada
Summary: We investigated the charge-state stabilization of shallow nitrogen-vacancy (NV) centers in (111) diamond using graphene/diamond junctions. Fluorescence stability and charge-state stability were measured on NV centers in both the graphene and graphene-free regions. The results showed that about half of the NV centers in the graphene-free region were unstable, while over 90% of the measured NV centers in the graphene region were stabilized as NV- centers. Graphene/diamond junctions significantly contribute to the charge-state stabilization of shallow NV- centers in (111) diamond.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Naoki Tanifuji, Takeshi Shimizu, Hirofumi Yoshikawa, Miki Tanaka, Kosuke Nishio, Kentaro Ida, Akihiro Shimizu, Yukio Hasebe
Summary: This study explores the application of eggshell membranes in polymer electrolyte fuel cells, aiming to develop cheaper and more eco-friendly options. The findings demonstrate that by using eggshell membranes as proton-conductive material, electricity can be generated, leading to cost reduction and further improvement of fuel cells.
Article
Chemistry, Physical
Ana T. F. Batista, Thomas Pigeon, Jordan Meyet, Dorothea Wisser, Mickael Rivallan, David Gajan, Leonor Catita, Fabrice Diehl, Anne-Sophie Gay, Anne Lesage, Pascal Raybaud, Celine Chizallet
Summary: We use DFT calculations and proton solid-state NMR experiments to determine the exact location and spatial proximity of hydroxyl groups on gamma-alumina crystallites. We find that the hydroxyl groups are predominantly located on edges, free from the H-bond network. Chlorination selectively occurs on edges and lateral facets, resulting in the disappearance of the hydroxyl groups and disruption of the H-bond network.
Article
Chemistry, Multidisciplinary
Daniele Rosa-Gastaldo, Marion Pupier, Giorgi Meshvildishvili, Jasmine Viger-Gravel, Thomas Burgi
Summary: Ligand and metal exchange reactions are important for shaping the properties of metal nanoclusters, and understanding the dynamics of the ligand monolayer is crucial for functionalization. Through experiments and simulations, we determined the activation parameters for an intracluster ligand rearrangement in specific clusters, revealing that the process does not involve metal-sulfur bond breaking and follows a first-order rate law, different from collisional ligand exchange.
Article
Pharmacology & Pharmacy
Jelena R. Mitrovic, Branka Divovic-Matovic, Daniel E. Knutson, Milos Petkovic, Djordje Djorovic, Danijela V. Randjelovic, Vladimir D. Dobricic, Jelena B. Dokovic, Dominique J. Lunter, James M. Cook, Miroslav M. Savic, Snezana D. Savic
Summary: The low solubility of deuterated pyrazoloquinolinone ligands has been a challenge in their preclinical development for treating neuropsychiatric disorders. However, through the use of nanocrystal formulations and lipid nanoparticles, the oral bioavailability of these ligands has been significantly improved. The lipid nanoparticles, with a high concentration of lecithin, showed stable properties and high encapsulation efficacy, leading to an increase in the pharmacokinetic behavior of DK-I-60-3.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Geochemistry & Geophysics
Matthew P. Griffiths, Denys Grombacher, Lichao Liu, Mathias O. Vang, Jakob Juul Larsen
Summary: This study investigates the effects of relaxation during pulse (RDP) on the dynamic equilibrium of SSFP measurement and incorporates it into the surface NMR forward model. The model is validated by jointly inverting multiple SSFP measurements, demonstrating its validity.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Fan Li, Kai Lu, Zhenyu Li
Summary: This study presents an application framework for directional gradient constraint on 2D unstructured triangular meshes. By properly meshing the underground space and imposing appropriate constraints, the accuracy of groundwater location and water content determination can be effectively improved. Field studies demonstrate that this method significantly enhances the identification of water table, soil interfaces, and abnormal groundwater locations.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Nutrition & Dietetics
Kate M. Bermingham, Mohsen Mazidi, Paul W. Franks, Tyler Maher, Ana M. Valdes, Inbar Linenberg, Jonathan Wolf, George Hadjigeorgiou, Tim D. Spector, Cristina Menni, Jose M. Ordovas, Sarah E. Berry, Wendy L. Hall
Summary: This study characterized the variability and correlations of postprandial metabolite changes in a large cohort. The majority of metabolites showed significant changes after a meal, particularly in very large lipoprotein particles and ketone bodies. Strong correlations were observed between fasting and postprandial metabolites, although some metabolites showed weak correlations.
Article
Chemistry, Physical
Michio Niwano, Teng Ma, Kazuki Iwata, Daisuke Tadaki, Hideaki Yamamoto, Yasuo Kimura, Ayumi Hirano-Iwata
Summary: The interfacial layer structure of bulk nanobubbles was determined, revealing the presence of three-, four-, and five-membered ring clusters of water molecules. It was hypothesized that a specific interfacial layer with a hydrogen bond network stabilizes the nanobubbles. The hardness of the interfacial layer was found to be dependent on the encapsulated gas species.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Plant Sciences
Ying Gu, Yi Chen, Xia Yue, Peng Xiong, Dayu Pan, Ping Song, Bin Luo
Summary: This study investigated the distribution and dynamics of water in the Xudou 20 soybean cultivar post-germination after culturing plants with different concentrations of 6-benzylaminopurine (6-BA) using low-field nuclear magnetic resonance and magnetic resonance imaging. Results showed that low concentrations of 6-BA promoted soybean germination, while higher concentrations inhibited germination, with 5 mg/l of 6-BA being the most optimal for growth. The determination of weakly bound water increased with increasing 6-BA concentration, and principal component analysis effectively distinguished soybeans cultured at different 6-BA concentrations. This study provides a method for the rapid detection of 6-BA concentration in bean sprouts and theoretical support for bean sprout quality assessment.
FRONTIERS IN PLANT SCIENCE
(2022)
