Enhancement of catalytic activity by homo-dispersing S_2O_8^(2–)-Fe_2O_3 nanoparticles on SBA-15 through ultrasonic adsorption

Mesoporous superacids S2O82–-Fe2O3/SBA-15(SFS)with active nanoparticles are prepared by ultrasonic adsorption method.This method is adopted to ensure a homo-dispersed nanoparticle active phase,large specific surface area and many acidic sites.Compared with bulk S2O82–-Fe2O3,Br?nsted acid catalysts and other reported catalysts,SFS with an Fe2O3 loading of 30%(SFS-30)exhibits an outstanding activity in the probe reaction of alcoholysis of styrene oxide by methanol with 100%yield.Moreover,SFS-30 also shows a more excellent catalytic performance than bulk S2O82–-Fe2O3 towards the alcoholysis of other ROHs(R=C2H5-C4H9).Lewis and Bronsted acid sites on the SFS-30 surfaces are confirmed by pyridine adsorbed infrared spectra.The highly efficient catalytic activity of SFS-30 may be attributed to the synergistic effect from the nano-effect of S2O82–-Fe2O3 nanoparticles and the mesostructure of SBA-15.Finally,SFS-30 shows a good catalytic reusability,providing an 84.1%yield after seven catalytic cycles.

An Intervention Study of Zhenwu Decoction in Taiyanghanshui Hypertension

[Objectives]To study the therapeutic effect and mechanism of Zhenwu decoction on Taiyanghanshui hypertension based on the theory of five movements and six qi.[Methods]First of all,under the guidance of the theory of five movements and six qi,Zhenwu decoction was used to clinically intervene in the hypertensive patients with deep and taut pulse and grade 1-2,and the clinical effect of Zhenwu decoction on hypertensive patients with Taiyanghanshui was observed.[Results]Zhenwu decoction can effectively reduce systolic blood pressure and diastolic blood pressure in patients with Taiyanghanshui hypertension.[Conclusions]Under the guidance of the theory of five movements and six qi in traditional Chinese medicine,Zhenwu decoction can effectively treat Taiyanghanshui hypertension.

Based on the Theory of Five Yun Six Qi to Study the Clinical Effect of Chaigui Decoction on Jueyin Type Hypertension

[Objectives]To study the clinical effect of Chaigui decoction(CGD)on Jueyin type hypertension based on the theory of Five Yun Six Qi.[Methods]52 patients with Jueyin type hypertension in Wuxi Hospital Affiliated to Nanjing University of Chinese Medicine from January,2020 to March,2021 were randomly divided into Western medicine control group(18 cases)and CGD group(34 cases).CGD group was treated with CGD,while the control group was treated with irbesartan or amlodipine.[Results]After treatment,the systolic blood pressure(SBP)of the two groups decreased significantly,the difference was statistically significant(P<0.05).After treatment,the diastolic blood pressure(DBP)of CGD group was significantly lower than that of the control group(P<0.05).[Conclusions]Based on the theory of Five Yun Six Qi,CGD has significant effect on Jueyin type hypertension,and the effect of reducing DBP is better than that of Western medicine control group.

Spatial effect and resonance energy transfer for the construction of carbon dots composites with long-lived multicolor afterglow for advanced anticounterfeiting

Carbon dots(CDs)with room-temperature phosphorescence(RTP)have attracted dramatically growing interest in optical functional materials.However,the photoluminescence mechanism of CDs is still a vital and challenging topic.In this work,we prepared CD-based RTP materials via melting boric acid with various lengths of alkyl amine compounds as precursors.The spatial effect on the structure and the RTP properties of CDs were systematically investigated.With the increase in carbon chain length,the interplanar spacing of the carbon core expands and crosslink-enhanced emission weakens,resulting in a decrease in the phosphorescence intensity and lifetimes.Meanwhile,based on triplet-to-singlet resonance energy transfer,we employed intense and long-lived phosphorescence CDs as the donor and short-lived fluorescent dyes as the acceptor to achieve long-lived multicolor afterglow.By the triplet-to-singlet resonance energy transfer,the afterglow color can change from green to orange.The afterglow lifetimes are more than 0.9 s.Thanks to the outstanding afterglow properties,the composites were used for timeresolved and multiple-color advanced anticounterfeiting.This work will promote the design of multicolor and long-lived afterglow materials and expand their applications.

Effect of Liandouqingmai Recipe on life quality and vascular endothelial injury in patients with coronary heart disease

OBJECTIVE:To observe the effects of Liandouqingmai Recipe on life quality and vascular endothelial injury in patients with coronary heart disease.METHODS:Capitalized 101 patients with coronary heart disease were randomly divided into a treatment group(n=45) treated with Liandouqingmai Recipe and a standard treatment group(control group,n=56).A normal group of 16 healthy persons was additionally set up.Changes in ET-1 and NO levels were measured and Seatle Angina Questionnaire(SAQ) was adopted in studying life quality before and after treatment for two weeks.The data were analyzed with SPSS 16.0 statistic software.RESULTS:The average level of ET-1 in the normal group was lower and NO higher than that of patients with coronary heart disease.There was no significant difference in the average level of ET-1 and NO and in the scores of SAQ [physical limitation(PL),pngina stability(AS),apngina frequency(AF),treatment satisfaction(TS) and disease perception(DP)] between the two groups before treatment(P>0.05).But after treatment,the scores of SAQ(PL,AS,AF,TS,DP) and NO level were higher than those in the control group,and ET-1 average level in the treatment group was lower than that in the control group.The negative relations between PL and ET-1 and between AF and ET-1 were found in this study.CONCLUSION:Liandouqingmai Recipe can raise scores of SAQ and NO level and decline ET level in patients with coronary heart disease on the basis of convertional standard treatment,thus improving vascular endothelial function and life quality.Life quality is related to vascular endothelial function.

Effect of Liandouqingmai recipe on quality of life and inflammatory reactions of patients with coronary heart disease

OBJECTIVE: To observe the effect of Liandouqingmai recipe(Chinese herbal medicine compound preparation) on the quality of life(QOL) and inflammatory reaction of patients with coronary heart disease(CHD).METHODS: A total of 101 CHD patients were randomized into two groups: treatment group(n=45)receiving standard treatment for CHD plus Liandouqingmai recipe, and control group(n=56) receiving standard treatment only. The control group contained 16 normal healthy subjects. Changes in hs-C-reactive protein(CRP), peripheral blood leucocytes(PBL), and interleukin(IL)-6 and IL-10 levels were measured. The Seattle Angina Questionnaire(SAQ) was used to determine patient QOL before and after treatment for 2 weeks.RESULTS: Before treatment, SAQ scores [physical limitation(PL), angina stability(AS), angina frequen-cy(AF), treatment satisfaction(TS), and disease perception(DP)] were not statistically different between groups. After treatment, AS and DP levels of controls were significantly increased compared with the other groups, while PL, AS, AF, TS, and DP levels of the treatment group were significantly increased compared with controls. Treatment group SAQ scores(PL, AS, AF, TS, and DP) were significantly higher than for controls. CHD patient IL-6 and IL-10 levels were significantly higher than controls.Before treatment, mean levels of IL-6, hs-CRP and PBL of the two groups were not statistically different. After treatment, mean levels of IL-6, IL-10,hs-CRP and PBL of the two groups were significantly decreased compared with their before treatment values, and levels of IL-6, hs-CRP, and PBL of the treatment group were lower than controls. Although mean IL-10 levels of both groups decreased, there was no significant difference in between-group and in-group comparisons before and after treatment. Mean levels of IL-6 and IL-10 in the normal group were lower than in CHD patients.SAQ scores of QOL were negatively associated with the inflammatory index(IL-6/IL-10), and there was a significant negative association of IL-10 with AS(r=﹣0.15, P<0.05).CONCLUSION: Inflammatory reactions in CHD patients are related to angina status. Coadministration of CHD standard treatment and Liandouqingmai recipe increased patient SAQ scores by decreasing IL-6, IL-10, hs-CRP, and PBL levels in CHD patients, which might inhibit endothelial inflammation to improve patient QOL.

Information environment,market-wide sentiment and IPO initial returns:Evidence from analyst forecasts before listing

Measuring the information environment of firms using analyst(price)forecast bias and forecast dispersion before listing,we empirically examine the interactive influence of the information environment and market-wide sentiment on the initial returns of initial public offerings(IPOs).We find the smaller the analyst forecast bias/dispersion,the lower the effect market-wide sentiment has on IPO initial returns.This finding indicates that information asymmetry is a basic reason for noise trading occurs and demonstrates the positive effect of financial analysts during IPOs.In addition,the effect of analyst forecasts is more pronounced during periods of rising markets and when IPO prices are not regulated.

Numerical simulation for erosion effects of three-phase flow containing sulfur particles on elbows in high sour gas fields

Sulfur particles carried by high-speed flow impact pipelines,which may cause equipment malfunctions and even failure.This paper investigates the scouring effect of mist gas containing sulfur particles on elbows in highly sour gas fields.The multiphase-flow hydrodynamic model of the 90
elbow was established by using the computational fluid dynamics(CFD)method.The scouring effects of the gasliquid mist fluid with the water-liquid fraction of 20%and particles with the diameter of 0.01 e0.05mm on elbows were explored within the flow velocity range of 0e20 m/s.In addition,the influences of secondary collision,mean curvature radius to diameter(R/D)ratio,inertial force,drag force,and Stokes number on trajectories of sulfur particles were studied.Moreover,the influences of hydrodynamic parameters of multiphase flow on corrosion inhibitor film were analyzed with the wall shear stress as the reference value.Serious erosion mainly occurred in the extrados of elbow as well as the junction between downstream pipeline and the intrados of elbow,the maximum erosion area occurs at 61.9
.When the incident position of the particle was far away from the top of the inlet plane,the probability of secondary collision became smaller.Furthermore,the erosion rate decreased with the rise in the R/D radio.The maximum erosion rate of elbow increased with the increase in the Stoke number.The maximum erosion rate reached 0.428 mm/a at 0.05mm particle diameter and 20 m/s fluid velocity.The wall shear stress increased with the increase in fluid velocity and mass flow rate of particle,the fitting function of the wall shear stress curve was the Fourier type.The results indicated that highvelocity particles had a serious erosion effect on elbows and affected the stability of the corrosion inhibitor film.The erosion effect could be retarded by controlling the velocity and diameter of particles.The results provided technical supports for the safe production in highly sour gas fields.