Significantly Enhanced Mechanical, Thermal, and Ablative Properties of the Lightweight Carbon Fabric/Phenol-Formaldehyde Resin/Siloxane Aerogels Ternary Interpenetrating Network.

Lightweight ablative thermal protection materials (TPMs), which can resist long-term ablation in an oxidizing atmosphere, are urgently required for aerospace vehicles. Herein, carbon fabric/phenol-formaldehyde resin/siloxane aerogels (CF/PFA/SiA) nanocomposite with interpenetrating network multiscale structure was developed via simple and efficient sol-gel followed by atmospheric pressure drying. The ternary networks structurally interpenetrating in macro-, micron-, and the nanoscales, chemically cross-linking at the molecular scale, and silica layer generated by in situ heating synergistically bring about low density (∼0.

One-Dimensional Copper-Doped RbAgI with Efficient Sky-Blue Emission as a High-Performance X-ray Scintillator.

Scintillators have garnered heightened attention for their diverse applications in medical imaging and security inspection. Nonetheless, commercial scintillators encounter challenges with costly rare-earth metals and toxic elements like thallium (Tl), driving the need for sustainable, cost-effective, and eco-friendly alternatives to meet contemporary X-ray detection demands. This study focuses on exploring the potential of Cu-doped RbAgI as an effective metal halide (MH) scintillator.

Novel green/red oxyfluoride phosphors with excellent optical properties for near-UV excited white light emitting diode.

Novel eye-sensitive BaNbOF(HO):Tb green and BaNbOF(HO):Mn red oxyfluoride phosphors with extremely strong absorption in the UV region were designed and synthesized by simple co-precipitation strategy. Particularly, Tb ions were doped in this matrix for the first time, which greatly improves their absorption efficiency in the near ultraviolet region (367 nm) and emits sharp green light (544 nm). In addition, the BaNbOF(HO):Mn red phosphors have strong zero phonon line (ZPL) emission at 625 nm, which is conducive to improving the sensitivity of human eye and color purity.

Sn(II)-doped one-dimensional hybrid metal halide [CHNO]CdCl single crystals with broadband greenish-yellow light emission.

Low-dimensional organic-inorganic hybrid halides, as an important branch of metal halide materials, have attracted much attention due to their excellent photoelectric properties. Herein, we designed one new hybrid cadmium chloride [CHNO]CdCl based on combinations of the d metal cation (Cd) and choline chloride molecules. [CHNO]CdCl single crystals belong to the orthorhombic 2 space group and show a one-dimensional (1D) structure with distorted [CdClO] octahedra.

Thermally Induced Reversible Fluorescence Switching of Lead Chloride Hybrids for Anticounterfeiting and Encryption.

Metal halide hybrids with thermally induced fluorescence transition have the potential to be utilized as the next generation of smart materials in optoelectronic devices. However, the fabrication of thermochromic materials with simultaneously reversible and lower transition temperatures is still a challenge. Herein, we present a novel one-dimensional (1D) organic-inorganic lead chloride hybrid (TPA)PbCl-Green (TPA = tetrapropylammonium) single crystal that exhibits green emission and up to 30% photoluminescence quantum yield (PLQY).

Ion-imprinted guanidine-functionalized zeolite molecular sieves enhance the adsorption selectivity and antibacterial properties for uranium extraction.

The important properties in the development of adsorbents for uranium extraction from seawater include specific selectivity to uranium ions and anti-biofouling ability in the ocean environment. In this paper, we report a novel strategy for efficient selective extraction of uranium from aqueous solutions and good anti-bacterial properties by surface ion-imprinted zeolite molecular sieves. Guanidine-modified zeolite molecular sieves 13X (ZMS-G) were synthesized and used as the support for the preparation of uranium(vi) ion-imprinted adsorbents (IIZMS-G) by ligands with phosphonic groups.

Preparation of dynamic covalently crosslinking keratin hydrogels based on thiol/disulfide bonds exchange strategy.

Dynamic covalently crosslinking (DCC) hydrogels can mimic extracellular matrix and have the functions such as self-healing, self-adapting, and shape memory. The DCC keratin hydrogels based on thiol group-disulfide bonds exchange strategy have no reports so far as we know. Herein, inspired by the rich content of the intramolecular disulfide bonds and free thiol groups in the keratins extracted by reducing agents, we report a simple thiol-disulfide bonds exchange strategy for preparing the DCC keratin hydrogels.

Ion-imprinted modified molecular sieves show the efficient selective adsorption of chromium(vi) from aqueous solutions.

Molecular sieve 5A was modified with (3-aminopropyl) triethoxysilane (APTES) as the support matrix, on which 4-VP was used as the ionic imprinting group. The as-prepared IIZMS-APTES was applied as the adsorbent for the recovery of chromium(vi) from aqueous solutions. The adsorbent was characterized Fourier transform infrared spectroscopy (FT-IR), scanning electronic microscopy (SEM), and X-ray diffraction (XRD).

The interaction of sodium dodecyl sulfate with trypsin: Multi-spectroscopic analysis, molecular docking, and molecular dynamics simulation.

The bioactivity of enzymes is sensitive to certain factors in their application environment, such as the pH, temperature, ionic strength, and additives, which can alter the native conformation of enzymes. To determine the mechanism by which the interaction of SDS influences the structure and activity of trypsin, molecular docking, molecular dynamics simulations, DSC, and multi-spectroscopic measures including UV absorption, fluorescence, and circular dichroism were used. The results show that the hydrolytic activity towards casein could be dramatically restrained by SDS.

Preparation of ZnO nanoparticle loaded amidoximated wool fibers as a promising antibiofouling adsorbent for uranium(vi) recovery.

In this study, nano-ZnO loaded amidoxime-functionalized wool fibers (wool-AO@ZnO) were synthesized by radiation-induced copolymerization and co-precipitation as a novel adsorbent with good antibiofouling properties for uranium recovery. The prepared adsorbent was characterized by SEM-EDS and FT-IR spectroscopy. Batch adsorption experiments showed that the prepared wool-AO@ZnO have a good uranium adsorption property at pH 6.

The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2.

P,P-bis (2-oxooxazolidin-3-yl)--(3-(triethoxysilyl)propyl)phosphinic amide (APTES-BOP)-modified SBA-15 (SBA-15-BOP) was prepared by a post-synthesis grafting method for the removal of anionic azo dyes from aqueous solutions. The properties of the prepared adsorbent were characterized by PXRD, FT-IR, SEM, TEM, nitrogen sorption, and elemental analysis. Adsorption equilibrium and adsorption kinetic studies demonstrated that the experimental data fitted well with the Langmuir isotherm model and pseudo-second-order model.

Novel polygonal structure Mn activated In-based Elpasolite-type hexafluorides red phosphor for warm white light-emitting diodes (WLEDs).

A novel type polygonal structure red emission Elpasolite-type hexafluorides (NH4)2NaInF6:Mn4+ phosphor is successfully synthesized by hydrothermal and coprecipitation methods. The samples exhibit two typical absorption bands located at the ultraviolet-visible (369 nm) and the blue light area (470 nm) and emit bright red light centered at 633 nm with high color purity. Powder X-ray diffraction (XRD) has been used to demonstrate the phase purity and crystal structure of the samples synthesized.

Controlled Morphology, Improved Photoluminescent Properties, and Application of an Efficient Non-rare Earth Deep Red-Emitting Phosphor.

Transition-metal tetravalent manganese ions (Mn) as luminescence center of red phosphors have drawn much attention owing to their broad-band absorption extended from UV to blue regions and narrow red-emissive band. In the present work, a series of Mn-doped BaGeF red phosphors were obtained via hydrothermal method. X-ray powder diffraction, energy-dispersive X-ray spectrometer, scanning electron microscope, and photoluminescence spectra were employed to determine the crystal structure, composition, morphology, and photoluminescence properties of all samples.

Collagen-Immobilized Lipases Show Good Activity and Reusability for Butyl Butyrate Synthesis.

Candida rugosa lipases were immobilized onto collagen fibers through glutaraldehyde cross-linking method. The immobilization process has been optimized. Under the optimal immobilization conditions, the activity of the collagen-immobilized lipase reached 340 U/g.

Super flame-retardant lightweight rime-like carbon-phenolic nanofoam.

The desire for lightweight nanoporous materials with high-performance thermal insulation and efficient anti-ablation resistance for energy conservation and thermal protection/insulation has greatly motivated research and development recently. The main challenge to synthesize such lightweight materials is how to balance the relationship of low thermal conductivity and flame retardancy. Herein, we propose a new concept of lightweight "rime-like" structured carbon-phenolic nanocomposites to solve this problem, where the 3D chopped network-structured carbon fiber (NCF) monoliths are incorporated with nanoporous phenolic aerogel to retain structural and functional integrity.

Osteogenesis imperfecta missense mutations in collagen: structural consequences of a glycine to alanine replacement at a highly charged site.

Glycine is required as every third residue in the collagen triple helix, and a missense mutation leading to the replacement of even one Gly in the repeating (Gly-Xaa-Yaa)(n) sequence with a larger residue leads to a pathological condition. Gly to Ala missense mutations are highly underrepresented in osteogenesis imperfecta (OI) and other collagen diseases, suggesting that the smallest replacement residue, Ala, might cause the least structural perturbation and mildest clinical consequences. The relatively small number of Gly to Ala mutation sites that do lead to OI must have some unusual features, such as greater structural disruption because of local sequence environment or location at a biologically important site.

Location of glycine mutations within a bacterial collagen protein affects degree of disruption of triple-helix folding and conformation.

The hereditary bone disorder osteogenesis imperfecta is often caused by missense mutations in type I collagen that change one Gly residue to a larger residue and that break the typical (Gly-Xaa-Yaa)(n) sequence pattern. Site-directed mutagenesis in a recombinant bacterial collagen system was used to explore the effects of the Gly mutation position and of the identity of the residue replacing Gly in a homogeneous collagen molecular population. Homotrimeric bacterial collagen proteins with a Gly-to-Arg or Gly-to-Ser replacement formed stable triple-helix molecules with a reproducible 2 °C decrease in stability.

Sequence environment of mutation affects stability and folding in collagen model peptides of osteogenesis imperfecta.

Osteogenesis imperfecta (OI), a disorder characterized by fragile bones, is often a consequence of missense mutations in type I collagen, which change one Gly in the repeating (Gly-Xaa-Yaa)(n) sequence to a larger amino acid. The impact of local environment and the identity of the residue replacing Gly were investigated using two sets of triple-helical peptides. Gly mutations in the highly stable (Pro-Hyp-Gly)(10) system are compared with mutations in T1-865 peptides where the mutation is located within a less stable natural collagen sequence.

[Quantity of released nickel ion from Ni-Cr alloy of compound galvano-ceramic bridge].

Objective: To evaluate the biological safety of compound galvano-ceramic bridge by measuring the consistency of released nickel ion of the galvano-form slices cohered with Ni-Cr alloy slice specimens which were immersed in artificial saliva.

Methods: Specimens were divided into five groups with four tests and one control. Test specimens were made into the structure like rectangle sandwich that one side of Ni-Cr alloy was cohered to the center surface of galvano golden base of 0.