Isolation, purification, and structural elucidation of polysaccharides with hypolipidemic effect.

is a widely grown edible mushroom with a high nutritional value. polysaccharides is one of the most important bioactive components of and has a wide range of activities. A polysaccharides, named SRF-3, was derived from the extraction by freeze-thaw combine with hot water extraction method, then prepareed with DEAE-cellulose column and Sephacryl S-200 HR gel column, and its hypolipidemic activity was determined.

Effects of vacancy defects on the magnetic properties of vanadium diselenide monolayers: a first principle investigation.

Long-range ferromagnetic (FM) order in vanadium diselenide (VSe) monolayers (MLs) remains a controversial subject. In this theoretical study, we examined the effect of vacancy defects on the magnetic properties of octahedrally coordinated 1T-VSe MLs using spin-polarized density functional theory (DFT). In total, 45 different kinds of defects with various concentrations were introduced, including two single vacancies (S), 27 double vacancies (D), nine triple vacancies (T), and seven quadruple vacancies (Q).

Current trends in smart mesoporous silica-based nanovehicles for photoactivated cancer therapy.

Photoactivated therapeutic strategies (photothermal therapy and photodynamic therapy), due to the adjusted therapeutic area, time and light dosage, have prevailed for the fight against tumors. Currently, the monotherapy with limited treatment effect and undesired side effects is gradually replaced by multimodal and multifunctional nanosystems. Mesoporous silica nanoparticles (MSNs) with unique physicochemical advantages, such as huge specific surface area, controllable pore size and morphology, functionalized modification, satisfying biocompatibility and biodegradability, are considered as promising candidates for multimodal photoactivated cancer therapy.

analytic calculation of point defects in AlGaN/GaN heterointerfaces.

One of the major challenges for the GaN-based high-electron-mobility transistors (HEMTs) used as high power devices is to understand the effect of defects, especially on the band alignment. Usingcalculation, herein we investigate the variations of band offsets with interfacial structure, defect position, interface states and Al content in AlGaN/GaN heterostructures (= 0.06, 0.

Two-Dimensional Metallic NiTe with Ultrahigh Environmental Stability, Conductivity, and Electrocatalytic Activity.

Two-dimensional (2D) metallic transition metal dichalcogenides (MTMDCs) supply a versatile platform for investigating newfangled physical issues and developing potential applications in electronics/spintronics/electrocatalysis. Among these, NiTe (a type-II Dirac semimetal) possesses a Dirac point near its Fermi level. However, as-prepared 2D MTMDCs are mostly environmentally unstable, and little attention has been paid to synthesizing such materials.

Giant Thickness-Tunable Bandgap and Robust Air Stability of 2D Palladium Diselenide.

Uncovering the thickness-dependent electronic property and environmental stability for 2D materials are crucial issues for promoting their applications in high-performance electronic and optoelectronic devices. Herein, the extrahigh air stability and giant tunable electronic bandgap of chemical vapor deposition (CVD)-derived few-layer PdSe on Au foils, by using scanning tunneling microscope/spectroscopy (STM/STS), are reported. The robust stability of 2D PdSe is uncovered by the observation of nearly defect/adsorption-free atomic lattices on long-time air-exposed samples.