ZnO-decorated SiC@C hybrids with strong electromagnetic absorption.

A novel strategy is provided to improve the absorption of SiC nanomaterials through surface carbonization of SiC nanowires and hydrolysis. SiC@C-ZnO composites were synthesized with different dosages of ZnNO·6HO. Composition, microstructure, and electromagnetic properties of the composites were characterized and analyzed.

Controllable Fabrication of SiC@C-FeO Hybrids and Their Excellent Electromagnetic Absorption Properties.

In this work, a batch of novel ternary hybrids (SiC@C-FeO), characterized by SiC nanowires core, carbon shell, and adhered FeO nanoparticles were controllably synthesized via surface carbonization of SiC followed by hydrothermal reaction. Carbon, which was derived from SiC with nanometer thickness, possesses an amorphous structure, while FeO nanoparticles are in a crystalline state. Simultaneously, the inducement of FeO nanoparticles can provide significant magnetic loss, which is well-tuned by changing the molar content of iron precursors (FeCl·6HO and FeCl·4HO).

[Determination of higenamine in Chinese herbal medicine, condiments, and topical medicine by QuEChERS combined with liquid chromatography-tandem mass spectrometry].

A method combining QuEChERS with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for the determination of higenamine in Chinese herbal medicine, condiments, and topical medicine. The sample was subjected to extraction using a formic acid-ethanol mixture, followed by purification of the QuEChERS sorbents; then, the extraction solution was introduced into the LC-MS/MS system for detection in multiple reaction monitoring (MRM) mode. Under the optimal conditions, the detection limit of the developed method was 0.

An induction heating device using planar coil with high amplitude alternating magnetic fields for magnetic hyperthermia.

Background: Induction heating devices using the induction coil and magnetic nanoparticles (MNPs) are the way that the magnetic hyperthermia is heading.

Objective: To facilitate the induction heating of in vivo magnetic nanoparticles in hyperthermia experiments on large animals.

Methods: An induction heating device using a planar coil was designed with a magnetic field frequency of 328 kHz.

[Plot analysis in the dark coniferous ecosystem using GPS and GIS techniques].

It is generally difficult to survey in primary forests located on high-altitude region. However, it is convenient to identify and to recognize plots accompanied by GPS and GIS techniques, which can also display the spatial pattern of arbors precisely. Using the method of rapid-static positioning cooperated with tape-measure, it is concluded that except some points, the positioning was relatively precise, the average value of RMS was 2.

[Fractal structure of Abies fabri, dominant tree species in dark coniferous forest at the upper reach of Yangtze River].

Based on the theory of fractal geometry, branching patterns of primitive Abies fabri in the dark coniferous forest ecosystem at the upper reach of Yangtze River were studied. The results showed that the maximum crown width was appeared at inferior 20% of the crown height, and its volume could be simulated by the combination of a round table and a cone. The surface of the crown and their branching patterns of Abies fabri had the common typical fractal characters, the fractal dimensions (FD) were 2.