Tailoring conductive network Zn@NPC@MWCNTs nanocomposites derived from ZIF-8 as high-performance electromagnetic absorber for the whole X-Band

A porous 3D cross-linked conductive network pierced by multi-wall carbon nanotubes(MWCNTs) was successfully designed from zeolitic imidazolate framework-8(ZIF-8). Zn@NPC@MWCNTs composites were tailored by the facile regulating the mass ratios and thermal annealing treatment. Due to the combination of less eddy current loss and dielectric loss together with multiple reflection attenuation caused by a unique structure. With a 10 wt% filler loading, the Zn@NPC@MWCNTs composites carbonized at 800℃ show two high reflection loss(RL) values with different thicknesses. An RL value is-53.18 dB with 4.09 mm thickness in the C-Band(4-8 GHz), and a minimum RL can reach-74.83 d B(10.8 GHz)with a matching thickness of 2.749 mm. The effective absorption bandwidth is 4 GHz(from 8 to 12 GHz,RL ≤-10 d B), which just covers the full X-band. Low cost and easy preparation can also provide advantages to develop MOF-based materials as effective EMW absorbents.

Theory discussion on airway remodeling of bronchial asthma

According to modern research,the pathogenesis of asthma mainly includes airway inflammation,airway hyperresponsiveness,airway remodeling,etc.Airway remodeling is the key factor that leads to the progress of asthma,and it is also the main factor that leads to airway hyperresponsiveness and irreversible airflow restriction.Traditional Chinese medicine believes that"phlegm and blood stasis"block the airway and narrow the lumen is the most important factor in the treatment of asthma.

Experimental study on acute toxicity of Lucao Wenban granules

Background:To evaluate the acute toxicity of the experienced prescription Lucao Wenban granules on mice and provide a theoretical basis for clinical medication safety.Methods:The mice were not deprived of water for 16 h after fasting,and were intragastrically given the experienced prescription Lucao Wenban granules at the maximum mass concentration(0.55 g/mL)and the maximum volume(0.04 mL/g body weight)2 times within 24 hours.The toxicity was observed and recorded within 14 days after administration.At the end of the experiment,the biochemical indexes of mice were detected.The liver,heart,spleen,lung,and kidney were dissected and observed after executing mice to weigh the wet weight and calculate the coefficient of viscera.Results:There was no death after the mice were given 342.32 g/kg of crude medicine of the experienced prescription Lucao Wenban granules.No significant differences were detected in body weight,biochemical indexes,visceral index between the experiment group and the control group.Conclusion:There is no acute toxicity in mice.The maximum tolerable dose is 342.32 g/kg,which is 144 times of clinical dose.