ObjectiveTo study the changing law of appearance color and physicochemical properties of Angelicae Sinensis Radix Carbonisata（ASRC） during the processing by color space method combined with statistical analysis， so as to provide reference for determining the processing endpoint and evaluating the quality of the decoction pieces. MethodsTaking processing time（4， 8， 12， 16 min） and temperature（180， 200， 220， 240 ℃） as factors， ASRC decoction pieces with different processing degrees were prepared in a completely randomized design. Then， the brightness value（L^*）， red-green value（a^*）， yellow-blue value（b^*）， and total chromaticity value （E^*ab） of the decoction pieces were determined by spectrophotometer， the color difference value（ΔE） was calculated， and the data of colorimetric values were analyzed by discriminant analysis. At the same time， the pH， charcoal adsorption， and contents of tannins， 5-hydroxymethylfurfural（5-HMF）， tryptophan， chlorogenic acid， ferulic acid， senkyunolide I， senkyunolide H and ligustilide of ASRC with different processing degrees were determined by pH meter， ultraviolet and visible spectrophotometry and ultra-high performance liquid chromatography（UPLC）. Principal component analysis（PCA） was used to analyze the data of physicochemical indexes， after determining the processing technology of ASRC， the canonical discriminant function was established to distinguish the decoction pieces with different processing degrees， and leave-one-out cross validation was conducted. Finally， Pearson correlation analysis was used to explore the correlation between various physicochemical indexes and chromaticity values. ResultsWith the prolongation of the processing time， L^*， a^*， b^* and E^*ab all showed a decreasing trend， and the established discriminant model based on color parameters was able to distinguish ASRC with different processing degrees. The pH showed an increasing trend with the prolongation of processing time， and the charcoal adsorption， and the contents of tannins， 5-HMF， and tryptophan all showed an increasing and then decreasing trend. Among them， the charcoal adsorption， contents of tannin and 5-HMF reached their maximum values successively after processing for 8-12 min. While the contents of chlorogenic acid， ferulic acid， senkyunolide I， senkyunolide H and ligustilide decreased with the increase of processing time， with a decrease of 60%-80% at 8 min of processing. Therefore， the optimal processing time should be determined to be 8-12 min. PCA could clearly distinguish ASRC with different processing degrees， while temperature had no significant effect on the processing degree. The 12 batches of process validation results（10 min， 180-240 ℃） showed that except for 3 batches identified as class Ⅱ light charcoal， all other batches were identified as class Ⅲ standard charcoal， and the chromaticity values of each batch of ASRC were within the reference range of class Ⅱ-Ⅲ sample chromaticity values. The correlation analysis showed that the chromaticity values were negatively correlated with pH and charcoal adsorption， and positively correlated with contents of tryptophan， chlorogenic acid， ferulic acid， senkyunolide I， senkyunolide H， and ligustilide. And both pH and charcoal adsorption were negatively correlated with the contents of the above components， but the charcoal adsorption was positively correlated with the content of 5-HMF. ConclusionThe chromaticity values and the contents of various physicochemical indicators of ASRC undergo significant changes with the prolongation of processing time， and there is a general correlation between chromaticity values and various physicochemical indicators. Based on the changes in color and physicochemical indicators， the optimal processing time for ASRC is determined to be 8-12 min. This study reveals the dynamic changes of the relevant indexes in the processing of ASRC， which can provide a reference for the discrimination of the processing degree and the quantitative study of the processing endpoint.

Objective To explore the correlation between central venous oxygen saturation(ScvO2)-re-lated indexes at different time points and the occurrence of low cardiac output syndrome(LCOS)after con-genital heart disease(CHD)correction surgery.Methods A total of 73 children who underwent CHD correc-tion surgery in this hospital from July 1st,2021 to July 1st,2024 were selected as the research subjects.The clinical data,preoperative conditions,and postoperative conditions of the children were collected.The ScvO2 and arterial lactate(Lac)levels of the children at different time points(the 1st,6th,12th,and 24th hours after surgery)were monitored,and the ScvO2/Lac at different time points and the change rate of ScvO2 in different time periods were calculated.The correlation between ScvO2-related indexes and LCOS after CHD correction surgery was analyzed.Results ScvO2 at the 6th hour after surgery,ScvO2 at the 12th hour after surgery,Sc-vO2/Lac at the 12th hour after surgery,the change rate of ScvO2 from the 1st to the 24th hour after surgery,the change rate of ScvO2 from the 6th to the 12th hour after surgery,and the change rate of ScvO2 from the 12th to the 24th hour after surgery were independent influencing factors of LCOS occurrence after CHD cor-rection surgery(P＜0.05).There was a negative correlation between ScvO2 at the 12th hour after surgery,ScvO2/Lac and LCOS occurrence after CHD correction surgery(r=-0.543,-0.523,P＜0.05).The area under the curve(AUC)of ScvO2 at the 12th hour after surgery for predicting LCOS occurrence after CHD correction surgery was 0.938(95％CI:0.865-1.000);the AUC of ScvO2/Lac at the 12th hour after surgery for predicting LCOS occurrence after CHD correction surgery was 0.922(95％CI:0.851-0.994).Conclusion ScvO2 and ScvO2/Lac at the 12th hour after surgery have good predictive potential for LCOS occurrence af-ter CHD correction surgery.

Objective:To investigate the effect of microwave on human adenovirus type 2 (HAdV-2) capsid protein in simulated infectious wastes.Methods:Droplets of HAdV-2 virus suspension were added to medical disposable gloves to simulate infectious waste, irradiated under different microwave conditions, the temperature change was recorded, and the irradiated viral supernatant was treated with Dnase I and detected by PCR and qPCR to determine the effect of microwave on the integrity of the viral capsid. ELISA was used to detect the effect of microwave irradiation on the structure of viral hexon protein. The virus was treated alone at the highest temperature during microwave irradiation to investigate whether there were non-thermal effects during microwave disinfection.Results:The maximum temperature during microwave irradiation was 76 ℃, and the PCR and qPCR result showed that Dnase I could significantly damage the viral nucleic acid after microwave irradiation, while the virus control group and heat treatment group were not significantly affected, indicating that microwave irradiation could destroy the integrity of the viral capsid. The result of ELISA showed that microwave irradiation could significantly weaken the binding ability of Hexon protein and antibody, and the result of heat treatment group were similar.Conclusions:Microwave irradiation can destroy the integrity of the HAdV-2 capsid and the structure of Hexon protein, in which the damage to the integrity of the capsid is mainly due to non-thermal effects, and the structural changes of hexon protein are mainly due to thermal effects.

Objective:To optimize the different salt preparation processes of salt-processed Psoraleae Fructus and compare the differences among different salt products.Methods:Ultra-high performance liquid chromatography (UPLC) characteristic chromatogram of Psoraleae Fructus was established. By using the comprehensive scoring method, the total content of psoralen and isopsoralen and the peak area of the characteristic chromatogram were used as the evaluation index to optimize the four different processing technologies, including "stir-frying with salt-water", "steaming with salt-water", "spraying with salt-water" and "microwaving with salt-water". Meanwhile, entropy weight TOPSIS method, clustering analysis (HCA), principal component analysis (PCA) and other chemical pattern recognition methods were used to compare the quality difference of different salt-processed Psoraleae Fructus.Results:The optimized "stir-frying with salt-water" process of salt-processed Psoralea Fructus was 170 ℃ for 13 min, "steaming with salt-water" process for 1 h, "spraying with salt-water" process for 110 ℃ for 13 min and "microwaving with salt-water" process for 105 s microwave heating. TOPSIS comprehensive evaluation results of entropy weight showed that the quality of different salt products of Psoraleae Fructus ranked as product of stir-frying with salt-water > product of stir-frying with green salt-water > product of spraying with salt-water > product of microwaving with salt-water > product of steaming with salt-water; HCA results showed that different salt products of Psoraleae Fructus could be polymerized into two categories, between which product of stir-frying with salt-water and product of stir-frying with green salt-water were polymerized into one category; product of spraying with salt-water, product of microwaving with salt-water and product of steaming with salt-water were another category; the results of PCA showed that different salt products of Psoraleae Fructus could be clustered into 4 categories, among which product of stir-frying with salt-water, product of stir-frying with green salt-water and product of spraying with salt-water were clustered into the same category respectively, and product of microwaving with salt-water and product of steaming with salt-water were clustered into the same category.Conclusion:The chemical composition of Psoraleae Fructus processed by different salting methods is different. The results of this study can provide reference for processing optimization of salt-processed Psoraleae Fructus and identification of different salt products.

Objective:To study the inactivation effects of microwave on human adenovirus 2 (HAdV-2) in simulated infectied wastes, and to explore its molecular mechanism.Methods:25 μl of HAdV-2 virus suspension was dripped with medical disposable gloves, masks and cotton swabs to simulate infectied wastes, and irradiated under different microwave conditions: gloves and masks were irradiated for 30 s, 60 s, and 90 s at 300 W, 500 W, and 700 W, respectively. Cotton swabs irradiate 60 s, 90 s, 120 s at 500 W and 700 W respectively. Temperature changes were recorded, and the inactivation logarithmic values were calculated by the 50% endpoint method to evaluate the microwave inactivation effects, and the proliferation ability of the virus was detected by qPCR. The damage of Penton, Fiber, Hexon and E2 B genes was detected by PCR. The virus was treated with the highest temperature of 76 ℃ during microwave irradiation to study whether there was non-thermal effect during microwave disinfection. Results:After microwave irradiation of infectied waste, the temperature of masks and gloves carriers rises rapidly, with the highest temperature of 76 ℃. The temperature of the cotton swab carriers rose slowly, and the highest temperature is 65 ℃. The inactivation effect of microwave on HAdV-2 was positively correlated with microwave power and irradiation time. In the mask and glove group, microwave power of 700 W irradiated for 60 seconds, and the inactivation logarithm value could reach 3.0, In the cotton swab group, microwave power of 700 W irradiated for 120 seconds, and the inactivation logarithm value was still less than 3.0. This indicated that there were differences in the conditions for microwave inactivation of the virus in different carriers. The qPCR result showed that microwave irradiation could weak the proliferation ability of the virus. Microwave irradiation had no effect on the virus's Penton and Fiber genes, but caused some damage to the Hexon and E2 B genes. The inactivation effect of individual heat treatment on HAdV-2 was weaker than that of microwave irradiation, and there was no damage to the Hexon, Penton, Fiber, and E2 B genes. This indicated the presence of non thermal effects during the microwave inactivation process. Conclusions:Microwave irradiation can inactivate HAdV-2 in simulated infectied wastes through thermal and non-thermal effects, and its damage to viral DNA is one of the mechanisms of virus inactivation.

Objective:To compare the differences of chemical components between single decoction and mixed decoction with different compatibility ratio of Inulae Flos- Haematitum medicinal pair. Methods:UPLC method was used to determine the contents of 5-caffeoylquinic acid, chlorogenic acid, 4-dicaffeoylquinic acid, caffeic acid, isoquercitrin, isochlorogenic acid B, 1,5- dicaffeoyl quinic acid, isochlorogenic acid C and the fingerprints of the single decoctions and mixed decoctions of Inulae Flos- Haematitum medicinal pair in four groups of proportions. The "peak area/sample weight" value of each common peak in the fingerprints was calculated, and the SPSS 26.0 was used for independent-sample t-test analysis. Results:There are significant differences in the "peak area/weight" values of peak 1, peak 2, peak 4, peak 6 , peak 9, peak 10, peak 12, peak 13, peak 15 between mixed decoction and single decoction of Inulae Flos - Haematitum medicinal pair with different compatibility ratios ( P<0.05), with statistical significance; when the compatibility ratio of Inulae Flos- Haematitum medicinal pair was 3:1, the difference of fingerprints and index components content between single decoction and combined decoction was the largest. Except for peak 7 and peak 14, the difference of "peak area/sample weight" value of other characteristic peaks was statistically significant ( P<0.05), and the content difference of 8 index components was statistically significant ( P<0.05). Conclusion:There are differences in the chemical components of Inulae Flos - Haematitum medicinal pair for single decoction and mixed decoction.