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In this experiment, degreased kidney bean protein was used as raw material. The effects of different ultrasonic conditions on the physicochemical properties and antioxidant capacity of kidney bean protein were analyzed by solubility, emulsification and total antioxidant capacity. The results showed that compared with the untreated group, when the ultrasonic time was 20 min and the power was 400 W, the hydrolysis degree and solubility of kidney bean protein reached the maximum value, which increased from 3.34% to 20.10% and 56.83% to 79.63%, respectively. Foamability and foamability stability of kidney bean protein were significantly enhanced after ultrasonic treatment (P

Using defatted adzuki bean protein as raw material, the effects of different ultrasonic power and time on the physical and chemical properties and antioxidant function of adzuki bean protein were studied by using hydrolysis degree, foaming ability and total antioxidant capacity. After treatment with ultrasonic power of 400 W for 20 min, the hydrolysis degree and solubility of adzuki bean protein reached the maximum value, which increased from 3.39% to 21.30% and 46.77% to 79.63%, respectively. Emulsification and emulsification stability were significantly enhanced (P

In order to optimize the extraction conditions of anthocyanins from Rosa davurica Pall. and investigate its antioxidant activity, single-factor experiment, Placket-Bumrman design, Box-Behnken analysis associated with ultrasonic extraction method were adopted. The antioxidant activity of anthocyanins from Rosa davurica Pall. were investigated by various methods, such as removal DPPH radical, \begin{document}${\rm{O}}_2^-\cdot $\end{document} radical, ABTS+ racial. The results showed that the optimum extraction conditions were as follows: Solid-liquid ratio was 1:15 g·mL−1, ultrasonic temperature was 50 ℃, ethanol volume was 60%, ultrasonic time was 30 min, pH was 2, and extraction times was 2. The content anthocyanins of Rosa davurica Pall. was 185.033 mg·100 g−1. The antioxidant activity was measured with IC50 and the results showed that the removal ability to DPPH free radical, superoxide anion free radical, ABTS+ free racial of the anthocyanins was 2.299, 1.902, 8.993 mg·mL−1, respectively. The technology in the current study was easy and feasible. The content of anthocyanins was considerable. Furthermore, it showed that the anthocyanins had certain antioxidant activity in various antioxidant experiments.

A quasi-linear convection system (QLCS) in the stratiform region on 6 July 2008 has been investigated using dual-Doppler radar data collected from Guangzhou and Shenzhen. Three dimensional wind field, kinematic and thermodynamic structure are analysed and the maintenance mechanism of QLCS is discussed. The results are as follows. (1) The QLCS was formed in stratiform cloud precipitation region and has a moderate vertical wind shear with a weak unstable synoptic environment. The surface existed obvious meso-β-scale shear line during the QLCS development and the QLCS formed along the shear line.During the system passaged, water vapor was close to saturation without cold pool. (2) When the QLCS was in mature phase, the areas of vertical ascending motion and positive vorticity had banded structure, convections developed almost vertically, most of the strong radar (>4 dBz) echo developed to a height of about 5 km, and there was no tilting to the front of the system. The kinematic structures of the QLCS at the mature stage showed that their inside convective updrafts were smaller and the maximum value (6 m·s-1) appeared at middle and high levels. Deep convergence formed by the relative influxes in the front low level (2 km or less) and the deep rear inflow (8 km) existed in the convection. (3) Inside the QLCS convections, there was a perturbation high with pressure decreasing from low to high levels. Very small perturbation potential temperature indicated that the buoyancy effect was weak. The vertical momentum budget calculation indicated that the vertical pressure gradient force produced by the perturbation pressure formed by convergence was the main mechanism for the convection maintenance.

Objective To investigate the application effect of transcutaneous electrical acupoint stimulation (TEAS) combined with propofol in painless gastrointestinal endoscopy. Methods A total of 105 patients who underwent gastrointestinal endoscopy were randomly divided into propofol+fentanyl group (P+F group), propofol+TEAS group (P+T group), and propofol+placebo-TEAS group (P+P group), with 35 patients in each group. All patients were induced to deep sedation by the anesthesiologist using propofol before gastroscopy; the patients in the P+F group were given intravenously injected fentanyl 50 μg before gastroscopy, those in the P+T group received placement of electrodes at the acupoints at 30 minutes before examination and were given electrical stimulation till the end of the examination, and those in the P+P group received placement of electrodes at the acupoints alone without electrical stimulation. The patients were recorded in terms of pain score and the amount of propofol used du-ring examination, the time to recovery from anesthesia after examination, and the incidence rate of adverse reactions during or after examination, as well as the degree of satisfaction among patients and physicians. Results Compared with the P+P group, the P+F and P+T groups had a significant reduction in pain score (H=23.16,P0.05), while the P+F group had significantly higher degrees of vertigo, nausea, and vomiting than the other two groups (H=40.97-44.79,P