Materials Literature
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Understanding the factors that govern the thermodynamic stability of metal–organic frameworks (MOFs) is critical to the development of these materials. In this work we present the first theoretical investigation of the stability of MOF polymorphs under solvothermal conditions. We combine thermodynamic integration (TI)…
In this communication we report the first homopolymerization of a variety of methacrylates by an NMP process at moderate temperature (40–50 °C), using an easily accessible and inexpensive nitroxide precursor. The combination of a low temperature azo-initiator with a hindered nitroso-compound produces a mixture of hind…
BACKGROUND/AIMS: This study was designed to investigate whether urinary kidney injury molecule-1 (KIM-1), interleukin-18 (IL-18) and cystatin C (Cys-C) are early predictive biomarkers for gadolinium-based contrast-induced nephropathy (Gd-CIN) in the elderly patients undergoing gadolinium-enhanced magnetic resonance im…
Presented here are three imidazole-linked tetrahedral zinc phosphonate frameworks based on a special ligand 2-(1-imidazole)-1-hydroxyl-1,1'-ethylidenediphosphonic acid (= ImhedpH4) with both an organic imidazole linker and inorganic phosphonate groups. Three new compounds, namely, [Zn2(ImhedpH2)2(ox)](H2ppz) (1), Zn3(…
Metal-organic framework catalysis: MIL-101 crystallites have been synthesized in different sizes and infiltrated with the Pd precursor complex [Pd(C5 H5 )(C3 H5 )]. Reduction of the Pd precursor complex gave rise to Pd nanoparticles inside the cavities of MIL-101 crystallites. Catalytic studies showed a clear dependen…
Phytochemical investigation of the leaves of Pittosporum angustifolium resulted in the isolation and structural elucidation of nine new triterpene saponins, named pittangretosides A-I (1-9), together with a known compound (10). Mainly by NMR and HRESIMS experiments, eight compounds were identified as A1-barrigenol gly…
Here we have synthesized an organic-inorganic hybrid mesoporous tin phosphonate monolith (MLSnP-1) with crystalline pore walls by a template-free sol-gel route. N2 sorption analysis shows Brunauer-Emmett-Teller (BET) surface area of 347 m2 g(-1). Wide-angle powder X-ray diffraction (PXRD) pattern shows few broad diffr…
Whether vitamin C from wholefoods has equivalent bioavailability to a purified supplement remains unclear. We have previously showed that kiwifruit provided significantly higher serum and tissue ascorbate levels than synthetic vitamin C in a genetically vitamin C-deficient mouse model, suggesting a synergistic activit…
An andic soil, akadama clay, was modified with nickel oxide and tested for its potential application in the removal of cesium from aqueous solution. Scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), and powder X-ray diffraction (XRD) results revealed the nickel oxide was successfully graf…
A continuous flow oxidative photocyclization of stilbene derivatives has been developed which allows the scalable synthesis of backbone functionalized phenanthrenes and helicenes of various sizes in good yields.
A series of three thiophene-naphthalene-based asymmetric oligomers-5-decyl-2,2':5',2'':5'',2'''-quaterthiophene (DtT), 5-decyl-5''-(naphthalen-2-yl)-2,2':5',2''-terthiophene (D3TN), and 5-(4-decylphenyl)-5'-(naphthalen-2-yl)-2,2'-bithiophene (DP2TN)-was synthesized by Suzuki cross-coupling reactions. The long alkyl si…
The dynamical and rheological properties of ultrasoft colloids and star polymers are investigated in dilute and semidilute solutions under linear shear flow. We apply a hybrid mesoscale hydrodynamics simulation approach, which combines molecular dynamics simulations for the solute with the multiparticle collision dyna…
By means of ab initio random structure search, we have revealed the crystal structure of Cu2Te, which is in agreement with the experimentally proposed Nowotny’s model. We have then performed extensive calculations based on density functional theories (DFT) on this Cu2Te structure. We have shown that the strong on-site…
Chronic wounds in previously radiated tissue are challenging to treat. In this article, the authors describe 3 such wounds that failed to heal despite multiple treatments with traditional wound healing methods. Treatment with porcine urinary bladder matrix, an extracellular matrix material, was initiated to facilitate…
Ocular dominance plasticity (ODP) in the cat primary visual cortex (V1) is induced during waking by monocular deprivation (MD) and consolidated during subsequent sleep. The mechanisms underlying this process are incompletely understood. Extracellular signal-regulated kinase (ERK) is activated in V1 during sleep after…
A simple roadmap is established for the construction of the smallest three-dimensional (3D) isotropic focal spots. It is achieved in a 4Pi configuration by imposing a restriction/condition of equal transverse and longitudinal spot sizes to determine the position of an annular aperture and then optimize its size. The c…
A strong anti-ice property of nanohairs over micro-ratchet surfaces is observed. A long freezing delay of more than 185 min is achieved for a droplet on the nanohairs over ratchet structure with a period of ∼290 μm under -10 °C, which is attributed to the effective cooperation of the nano- and microstructures.
High-frequency double electron-electron resonance (DEER) distance measurements using different Gd3+ tags (Gd-DOTA and Gd-C1) were carried out on transmembrane helical peptides (ca. 0.15 nmol; WALP peptides) in a model membrane. The ability to pick up small distance variations, the chemical flexibility of the tags, and…
Two new donor–acceptor (D–A) copolymers based on 1,2,5,6-naphthalenediimides (iso-NDI) and thiophene units, iso-P(NDI2OD-T2) and iso-P(NDI2OD-TT), were designed from isomer chemistry and compared with the reported isomeric copolymers P(NDI2OD-T2) and P(NDI2DT-TT) to investigate the influence of isomeric structure on t…
We have developed a model for the prediction of cell attachment to engineered microtopographies based on two previous models: the attachment point theory and the engineered roughness index (ERI) model. The new surface energetic attachment (SEA) model is based on both the properties of the cell-material interface and t…