Efficacy and safety of Yangxinshi tablet for chronic heart failure:A systematic review and meta-analysis

BACKGROUND The specific benefits of Yangxinshi tablet(YXST)in the treating chronic heart failure(CHF)remain uncertain.AIM To systematically evaluate the efficacy and safety of YXST in the treatment of CHF.METHODS Randomized controlled trials(RCTs)investigating YXST for CHF treatment were retrieved from eight public databases up to November 2023.Meta-analyses of the included clinical studies were conducted using Review Manager 5.3.RESULTS Twenty RCTs and 1845 patients were included.The meta-analysis results showed that the YXST combination group,compared to the conventional drug group,significantly increased the clinical efficacy rate by 23%[relative risk(RR)=1.23,95%CI:1.17-1.29],(P<0.00001),left ventricular ejection fraction by 6.69%[mean difference(MD)=6.69,95%CI:4.42-8.95,P<0.00001]and 6-min walk test by 49.82 m(MD=49.82,95%C:38.84-60.80,P<0.00001),and reduced N-terminal pro-Btype natriuretic peptide by 1.03 ng/L[standardized MD(SMD)=-1.03,95%CI:-1.32 to-0.74,P<0.00001],brain natriuretic peptide by 80.95 ng/L(MD=-80.95,95%CI:-143.31 to-18.59,P=0.01),left ventricular end-diastolic diameter by 3.92 mm(MD=-3.92,95%CI:-5.06 to-2.78,P<0.00001),and left ventricular endsystolic diameter by 4.34 mm(MD=-4.34,95%CI:-6.22 to-2.47,P<0.00001).Regarding safety,neither group reported any serious adverse events during treatment(RR=0.54,95%CI:0.15-1.90,P=0.33).In addition,Egger's test results indicated no significant publication bias(P=0.557).CONCLUSION YXST effectively improves clinical symptoms and cardiac function in patients with CHF while maintaining a favorable safety profile,suggesting its potential as a therapeutic strategy for CHF.

The Therapeutic Effect of Biling Weitong Granules Combined with Oryz-Aspergillus Enzyme and Pancreatin Tablet on Reflux Esophagitis with Functional Dyspepsia

Objective:To investigate the therapeutic effect of Biling Weitong Granules combined with oryz-aspergillus enzyme and pancreatin tablets on patients with reflux esophagitis with functional dyspepsia.Methods:Sixty patients diagnosed with reflux esophagitis with functional dyspepsia who were admitted to the Affiliated Hospital of Hebei University between June 2020 and June 2023 were selected and divided into two groups:the control group and the observation group,each consisting of 30 cases.The control group received oryz-aspergillus enzyme and pancreatin tablets only,while the observation group received Biling Weitong Granules in addition to the tablets.The clinical efficacy,Chinese medicine syndrome points,esophageal kinetic indexes,gastrointestinal hormone levels,and therapeutic safety of both groups were evaluated.Results:The total efficiency of the observation group reached 93.33%,significantly higher than the 73.33%of the control group(P<0.05).After treatment,patients in the observation group exhibited significantly lower scores for Chinese medicine symptoms such as early satiety,belching,abdominal distension,abdominal pain,and loss of appetite compared to the control group(P<0.05).Furthermore,the observation group showed significantly higher upper esophageal sphincter pressure,lower esophageal sphincter pressure,and distal esophageal contraction scores compared to the control group(P<0.05).Additionally,levels of gastric motility hormone,vasoactive intestinal peptide,and gastrin were significantly higher in the observation group compared to the control group(P<0.05).Throughout the treatment period,there was no significant difference in the incidence of adverse reactions between the two groups,indicating comparable safety of the two treatment modalities(P>0.05).Conclusion:The combination of Biling Weitong Granules with oryz-aspergillus enzyme and pancreatin tablets demonstrates significant efficacy in the treatment of reflux esophagitis with functional dyspepsia,with a better safety profile.This finding warrants further clinical promotion.

基于改进DLT算法的单目标识别跟踪研究

为了提高DLT算法在视频中运动目标物体的跟踪鲁棒性、稳定性、实时性,对DLT算法进行改进。通过中值光流法计算初始位置和预测位置像素点灰度值的欧氏距离;运用一种新的在线学习机制P-N学习,用标记样本训练分类器,修改错误的正负样本,然后通过分类器对未被标注的数据进行标注,依次进行迭代训练;利用误差法和NCC法筛选出跟踪点,根据跟踪点的位置和距离的变化计算出目标框的大小和位置,实现目标跟踪。结果表明,改进后的DLT算法的目标跟踪的鲁棒性增强,能够根据目标框的实际情况获取有效的特征点,减少视频流中的目标过大或过小导致跟丢的情况。

Baseline metabolites could predict responders with hepatitis B virus-related liver fibrosis for entecavir or combined with FuzhengHuayu tablet

BACKGROUND After receiving entecavir or combined with FuzhengHuayu tablet(FZHY)treatment,some sufferers with hepatitis B virus(HBV)-related liver fibrosis could achieve a histological improvement while the others may fail to improve even worsen.Serum metabolomics at baseline in these patients who were effective in treatment remain unclear.AIM To explore baseline serum metabolites characteristics in responders.METHODS A total of 132 patients with HBV-related liver fibrosis and 18 volunteers as healthy controls were recruited.First,all subjects were divided into training set and validation set.Second,the included patients were subdivided into entecavir responders(E-R),entecavir no-responders(E-N),FZHY+entecavir responders(FR),and FZHY+entecavir no-responders(F-N)following the pathological histological changes after 48 wk’treatments.Then,Serum samples of all subjects before treatment were tested by high performance liquid chromatographytandem mass spectrometry(LC-MS)high-performance LC-MS.Data processing was conducted using multivariate principal component analysis and orthogonal partial least squares discriminant analysis.Diagnostic tests of selected differential metabolites were used for Boruta analyses and logistic regression.RESULTS As for the intersection about differential metabolic pathways between the groups E-R vs E-N and F-R vs F-N,results showed that 4 pathways including linoleic acid metabolism,aminoacyl-tRNA biosynthesis,cyanoamino acid metabolism,alanine,aspartate and glutamate metabolism were screened out.As for the differential metabolites,these 7 intersected metabolites including hydroxypropionic acid,tyrosine,citric acid,taurochenodeoxycholic acid,benzoic acid,2-Furoic acid,and propionic acid were selected.CONCLUSION Our findings showed that 4 metabolic pathways and 7 differential metabolites had potential usefulness in clinical prediction of the response of entecavir or combined with FZHY on HBV fibrotic liver.

MPC-DLT法校正锥形束CT几何参数

为解决几何标记物放置准确性的问题,探讨了一种利用MPC-DLT算法校正锥形束CT几何参数的方法。该方法通过迭代方式更新几何标记物的空间坐标并进行直接线性变换构造代价函数,最小化代价函数即为标记物坐标最优解。实验结果表明,相比传统方法,MPC-DLT可显著降低扫描过程中几何参数的震荡幅度,提高几何校正的精度,降低重建图像的几何畸变,同时保持图像空间分辨率不变。

Investigation of Tablet Defects by AI Based Terahertz Technology

Recently a lot of medical tablets with special packets in the global market are available. For the safety and purity of the tablet, we need to scan it by developed scanner technology, which should be not more expensive and easily available in the market. The THz technology is one of them. In the proposed work, we have tasted tablet images with the help of the THz super-resolution scanner, which is already available in our lab. The AI machine learning data concept has been investigated. Good resolution of images has been obtained. Furthermore, the challenging research problems are discussed. Finally, it summarizes the recent updates in terahertz technology for drug inspection and medical applications with potential research challenges.

Single-cell transcriptome analysis uncovers underlying mechanisms of acute liver injury induced by tripterygium glycosides tablet in mice

Tripterygium glycosides tablet(TGT),the classical commercial drug of Tripterygium wilfordii Hook.F.has been effectively used in the treatment of rheumatoid arthritis,nephrotic syndrome,leprosy,Behcet's syndrome,leprosy reaction and autoimmune hepatitis.However,due to its narrow and limited treatment window,TGT-induced organ toxicity(among which liver injury accounts for about 40%of clinical reports)has gained increasing attention.The present study aimed to clarify the cellular and molecular events underlying TGT-induced acute liver injury using single-cell RNA sequencing(scRNA-seq)technology.The TGT-induced acute liver injury mouse model was constructed through short-term TGT exposure and further verified by hematoxylin-eosin staining and liver function-related serum indicators,including alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase and total bilirubin.Using the mouse model,we identified 15 specific subtypes of cells in the liver tissue,including endothelial cells,hepatocytes,cholangiocytes,and hepatic stellate cells.Further analysis indicated that TGT caused a significant inflammatory response in liver endothelial cells at different spatial locations;led to marked inflammatory response,apoptosis and fatty acid metabolism dysfunction in hepatocytes;activated hepatic stellate cells;brought about the activation,inflammation,and phagocytosis of liver capsular macrophages cells;resulted in immune dysfunction of liver lymphocytes;disturbed the intercellular crosstalk in liver microenvironment by regulating various signaling pathways.Thus,these findings elaborate the mechanism underlying TGT-induced acute liver injury,provide new insights into the safe and rational applications in the clinic,and complement the identification of new biomarkers and therapeutic targets for liver protection.

Formulation and Antioxidant Activity Evaluation of Theaflavin Effervescent Tablet

Theaflavins(TFs),as the major polyphenolic components of fermented tea,possess beneficial effects on human health.In this study,the effervescent tablets based on theaflavins were developed.The optimal formulation of TF effervescent tablets was obtained by response surface methodology with the Box-Behnken design.Then,the physiochemical properties were evaluated,including hardness,friability,effervescent time and pH of the solution.At last,the antioxidant ability of TF effervescent tablets was studied through DPPH and ABTS radical scavenging assay.According to the results,the optimal formulation of the tablets contained TF powder 9.09%,disintegrating agent 43.80%(the weight ratio of citric acid and sodium bicarbonate was 1:1),aspartame 1.86%,PEG-6003%,and mannitol in balance.With the wet granulation method,the TF effervescent tablets displayed suitable hardness,fast disintegration time,good color,pleasant taste and high antioxidant activity.This study demonstrated that the TF effervescent tablets could be a valuable product for the supplement market and contribute to promoting practical application of TFs.

Integration of network pharmacology with experimental verification reveals the hypoglycemic mechanism of coptisine in Jinqi Jiangtang tablets:inhibition of the FoxO1 signaling pathway and hepatic gluconeogenesis

Background:Jinqi Jiangtang tablets(JQJT)have been approved for the treatment of type 2 diabetes mellitus(T2DM)in China for many years.Exploring the effective substances and mechanisms of JQJT is important for its clinical application and further drug research and development.This study aimed to explore the chemical basis and mechanisms of JQJT in the treatment of T2DM.Methods:With network pharmacology,we screened substances in JQJT and their possible targets,then constructed the action network and enriched the biological functions and pathways associated with the active components,and identified the potential targets and mechanisms of JQJT in the treatment of T2DM.Based on the network pharmacology data,we explored the hypoglycemic mechanisms of coptisine in JQJT through western blot and quantitative real-time polymerase chain reaction.Results:Forty-three compounds with good pharmacokinetic properties were identified in JQJT,together with 146 potential biological targets.Among these potential targets,74 were associated with treatment of T2DM.A compound-target network of the 43 compounds against T2DM was constructed.Biological process and signal pathway enrichment analysis of the network highlighted the FoxO signaling pathway.Western blot and quantitative real-time polymerase chain reaction results showed that coptisine,but not epiberberine,significantly inhibited expression of key genes involved in hepatocyte gluconeogenesis by regulating the FoxO1 signaling pathway.Conclusion:Network pharmacology analysis and cell experiments showed that coptisine regulated glucose homeostasis by inhibiting the FoxO1 signaling pathway and hepatic gluconeogenesis,which may be one of the mechanisms of JQJT in the treatment of T2DM.

Optimization of the Formulation Process of Glucosamine Chondroitin Sulfate Tablets

[Objectives]This study was conducted to optimize the Formulation Process of glucosamine chondroitin sulfate tablets. [Methods] The orthogonal design with three levels was carried out with microcrystalline cellulose, calcium hydrophosphate and cross-linked polyvinylpyrrolidone as three factors to optimize the preparation process. [Results] When microcrystalline cellulose 200 mg/tablet, calcium hydrophosphate 150 mg/tablet, and cross-linked polyvinylpyrrolidone 80 mg/tablet were added, the angle of repose could meet the requirements of tablet pressing, and the dissolution could reach more than 95% in 30 min. The results of the orthogonal test showed that the dissolution effect of self-made tablets was faster than that of commercial products. [Conclusions] The glucosamine hydrochloride chondroitin sulfate tablets prepared by this prescription have better quality.

Clinical efficacy and safety of Guipi decoction combined with escitalopram oxalate tablets in patients with depression

BACKGROUND Depression is a widespread mental health condition that requires effective treatment.In the treatment of depression,traditional Chinese medicine(TCM)offers obvious advantages,fewer adverse reactions,and a lower recurrence rate.AIM To evaluate the clinical benefits of Guipi decoction combined with escitalopram oxalate tablets for individuals with depression.METHODS In total,80 patients diagnosed as having depression were enrolled in the study and divided into either an experimental group or a control group.All of the patients were orally administered escitalopram oxalate tablets.Additionally,the experimental group received Jiajian Guipi decoction and reduced Governor vessel fumigation over 4 wk.TCM syndrome scores,Hamilton depression rating scale(HAM-D)scores,self-rating depression scale(SDS)scores,and Pittsburgh sleep quality index scores were measured for the two groups and compared before and after the treatment.The two groups were monitored for any adverse reactions.RESULTS After 4 wk of treatment,both groups exhibited a significant reduction in TCM syndrome scores compared with their pre-treatment scores(P<0.05).However,the experimental group exhibited significantly lower TCM syndrome scores than the control group(P<0.05).Similarly,the post-treatment SDS and HAM-D-24 scores were significantly lower in both groups than the pre-treatment scores(P<0.05),with the experimental group exhibiting lower scores than the control group(P<0.05).The total treatment efficiency was significantly better in the experimental group(97.14%)than in the control group(77.78%)(P<0.05).Furthermore,after 4 wk of treatment,the Pittsburgh sleep quality index scores for both groups were significantly lower than those before the treatment(P<0.05),with the experimental group exhibiting lower scores than the control group(P<0.05).The incidence of adverse reactions was significantly lower in the experimental group than in the control group(P<0.05).CONCLUSION The combination of Guipi decoction and escitalopram oxalate tablets was found to be an effective and safe treatment for depression.This combination could reduce TCM syndrome scores,improve depressive symptoms,and enhance sleep quality.

To explore the mechanism of Naodesheng tablets in the treatment of atherosclerosis based on network pharmacology and bioinformatics

Background:Naodesheng tablets(NDST)was widely used in clinical treatment as a drug for cardiovascular diseases,but the mechanism for treating atherosclerosis was unknown.On the basis of network pharmacology and bioinformatics,predict the relevant targets and signalling pathways for NDST in the treatment of atherosclerosis.Methods:First,the targets of NDST and the targets for treating atherosclerosis were looked for in different databases.Next,Venny 2.1.0 was used to find the genes that overlapped between NDST and targets for treating atherosclerosis.Subsequently,the herb-active ingredient-target-disease were obtained to explore the hub compound.Furthermore,the Metascape database was used for Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis.And we constructed the“active ingredient-intersection target-pathway”network by Cytoscape software to gain the hub genes and pathways.Finally,molecular docking was used to verify the affinity of hub ingredients and hub genes.Results:In the results,67 active ingredients and 322 targets of NDST were selected in ingredients-targets network.154 overlapping targets of NDST(322)and atherosclerosis(1330)were obtained.Then,the herb-active ingredient-target-disease showed that quercetin,apigenin and luteolin were the hub ingredients to treat atherosclerosis.Further,the hub genes(PTGS2,RXRA,CASP3)and pathways(lipid and atherosclerosis)were accessed in active ingredient-intersection target-pathway.Finally,the results indicated that quercetin,apigenin and luteolin were better binding the PTGS2,RXRA,CASP3,especially PTGS2 and luteolin in molecular docking.Conclusion:In conclusion,quercetin,apigenin and luteolin,as the main ingredients of NDST could play a important role in PTGS2,RXRA,and CASP3 for treating atherosclerosis via the lipid and atherosclerosis(TNF signaling pathway).

Study on the Effect of Bifidobacterium Quadruple Viable Tablets in the Treatment of Ulcerative Colitis

Objective:To study the therapeutic efficacy of patients with ulcerative colitis receiving Bifidobacterium quadruple viable tablets.Methods:49 cases were selected from ulcerative colitis patients who attended the clinic from February 2021 to November 2022,and were randomly grouped into group A for addition of Bifidobacterium quadruple viable tablets treatment,and group B for conventional medication.The efficacy,inflammatory factors,nutritional indexes,and adverse reactions were compared between the groups.Results:The efficacy of UC patients in group A was higher than that in group B(P<0.05);the inflammatory factors in group A were lower than that in group B(P<0.05);nutritional indicators in group A were higher than that in group B(P<0.05);and the adverse reactions of medication in UC patients in group A were lower than that in group B(P<0.05).Conclusion:The treatment of UC patients with the addition of Bifidobacterium quadruple viable tablets can improve the nutritional status of the organism,inhibit the progression of inflammation,and is safe and efficient in treating ulcerative colitis.

Study on the Clinical Efficacy of Megestrol Acetate Dispersible Tablets in Adjuvant Treatment of Acute Leukemia

Objective:To analyze the clinical efficacy of megestrol acetate dispersible tablets in the adjuvant treatment of acute leukemia.Methods:80 patients with acute leukemia admitted from December 2021 to December 2022 were randomly divided into two groups.The control group underwent chemotherapy,and the observation group took megestrol acetate dispersible tablets and underwent chemotherapy.The effect of the treatments were evaluated by analyzing the albumin(Alb)and prealbumin(Palb)indicators,and the adverse reactions were observed.Results:There was no significant difference in Alb and Palb indexes between the two groups before treatment(P>0.05).After treatment,Alb and Palb indexes in the observation group were greater than those in the control group(P<0.05).The incidence of adverse reactions in the control group was 20.00%,which was significantly higher than the observation group(5.00%),with P<0.05.Conclusion:The combination of megestrol acetate dispersible tablets and chemotherapy is more effective in treating patients with acute leukemia,and the Alb and Palb indexes can be optimized.Besides,there are fewer adverse reactions,which means that the treatment is relatively safe.

Clinical Study on Treatment of Chronic Prostatitis with Lingze Tablets Combined with TCM Herbal Acupoint Plasters

Objective:To study the therapeutic effect of Lingze tablets combined with traditional Chinese medicine herbal acupoint plasters on chronic prostatitis.Methods:A total of 64 patients with chronic prostatitis who were admitted to the Andrology Clinic of Shuyang County Hospital of Traditional Chinese Medicine from March 2021 to March 2023 were randomly divided into a treatment group and a control group,with 32 cases in each group.The control group took Lingze tablets orally,4 tablets/time,3 times/d;the treatment group took the same medication along with traditional Chinese medicine acupoint herbal plasters.The two groups of patients were treated continuously for 6 weeks,and the differences in the relevant indexes of the curative effect were observed.Results:The NIH-Chronic Prostatitis Symptom Index(NIH-CPSI)scores of the two groups significantly reduced after treatment(P<0.05),and the scores of the patients in the treatment group were lower than those in the control group(P<0.05).The treatment received in the treatment group achieved and efficacy of 96.88%,which was significantly higher than that of the group,which was 81.25%(P<0.05).The maximum flow rate(MFR),average flow rate AFR,and urine output of the patients of both groups improved significantly after treatment(P<0.05).However,the experimental group showed better improvements in these indicators(P<0.05).Conclusion:Lingze tablets combined with traditional Chinese medicine acupoint herbal plasters can significantly improve the symptoms and urodynamic function of patients with chronic prostatitis.

Systematic Review and Meta-analysis of Efficacy and Safety of Tenghuang Jiangu Tablet(藤黄健骨片)in the Treatment of Discogenic Low Back Pain

Objective:To systematically evaluate the efficacy and safety of Tenghuang Jiangu Tablet(藤黄健骨片)in the treatment of discogenic low back pain.Methods:CNKI,WanFang,CBM,VIP,PubMed,EMbase,Cochrane Library and Web of Science were systematically searched to collect the randomized controlled trials(RCTs)of Tenghuang Jiangu Tablet in the treatment of discogenic low back pain.Literature screening and data extraction according to the set criteria were conducted.Cochrane Risk Bias assessment tool was used to evaluate the quality of included RCTs,and Meta-analysis was performed using RevMan 5.4.1 software.Results:A total of 4 studies were included,with a total sample size of 404 cases.The results of Meta-analysis suggested that Tenghuang Jiangu Tablet combined with conventional treatment in the treatment of discogenic low back pain was superior to conventional treatment alone in terms of total clinical response rate(RR=1.21,95%CI[1.09,1.35],P=0.0004),excellent rate of curative effect(RR=1.24,95%CI[1.10,1.41],P=0.0007),lower VAS score(MD=-0.62,95%CI[-0.79,-0.44],P<0.00001)and JOA score(MD=1.84,95%CI[1.35,2.33],P<0.00001).There was no statistical significance in the incidence of adverse reactions between Tenghuang Jiangu Tablet combined with conventional treatment and conventional treatment alone(RR=0.76,95%CI[0.04,15.42],P=0.86).Conclusion:Based on existing research and methods,Tenghuang Jiangu Tablet combined with conventional therapy is effective on discogenic low back pain.Conventional therapy combined with Tenghuang Jiangu Tablet for the treatment of discogenic low back pain may be better than conventional therapy alone.All the adverse reactions occurred during the treatment were mild.There is no evidence that Tenghuang Jiangu Tablet can cause serious adverse reactions.However,the number of existing clinical studies is small and the quality is generally not high.It is suggested to carry out more large-sample and high-quality RCTs,and pay more attention to the long-term efficacy of drugs and the occurrence of adverse reactions,so as to further verify the above conclusions.

乳痛软坚片抗炎镇痛及调节免疫药效作用的实验研究

目的:探讨乳痛软坚片抗炎、镇痛及调节免疫的药效作用。方法:通过小鼠扭体实验、小鼠热板法实验,采用醋酸扭体及热板致痛模型,以扭体次数、痛域值为检测指标,观察乳痛软坚片的镇痛作用;通过大鼠肉芽肿实验、大鼠足肿胀实验,采用棉球植入诱导大鼠肉芽肿增生、角叉菜胶致炎模型,以肉芽重量、足跖肿胀度为检测指标,观察乳痛软坚片抗炎作用;通过小鼠血清溶血素实验、小鼠碳粒廓清实验,采用腹腔注射5%氯化钠溶液鸡红细胞混悬液、小鼠尾静脉注射20%印度墨汁(0.1 mL/10 g)制造小鼠免疫抑制模型,以血清溶血素、廓清指数(K)、吞噬指数(α)为检测指标,观察乳痛软坚片的调节免疫作用。结果:扭体实验中,乳痛软坚片高剂量组小鼠扭体潜伏期长于模型组,扭体次数少于模型组(P<0.01或P<0.05);乳痛软坚片中剂量组小鼠扭体次数少于模型组(P<0.05)。热板法实验中,乳痛软坚片组高、中剂量组小鼠给药后1、2、3 h痛域值高于模型组(P<0.01或P<0.05)。大鼠肉芽肿实验中,乳痛软坚片组高、中、低剂量组大鼠肉芽质量均低于模型组(P<0.01或P<0.05)。大鼠足肿胀实验中,乳痛软坚片高剂量组大鼠在致炎后1、3、4 h足跖肿胀度低于模型组(P<0.05),乳痛软坚片中剂量组大鼠在致炎后3、4 h足跖肿胀度低于模型组(P<0.05)。小鼠血清溶血素实验中,乳痛软坚片高剂量组小鼠溶血素高于模型组(P<0.01)。小鼠碳粒廓清实验中,乳痛软坚片高、中、低剂量组小鼠廓清指数、吞噬指数均高于模型组,差异均有统计学意义(P<0.01或P<0.05)。结论:乳痛软坚片具有良好的抗炎、镇痛及调节免疫的药理作用。

层板销合木的界面滑移与木梁受弯性能

层板销合木(简称销合木)是一种由规格材通过销组合而成的新型结构用木材,与胶合木相比具有加工快捷、成本低且更加绿色环保等优点。为研究销合木梁的弯曲性能,设计了8组木梁的四点弯试验,试验参数包括销的种类(木销和竹销)、销间距(70、100和140 mm)和层板的数量(3、4和6层)。此外,为揭示层积材界面销连接抗剪性能对销合木梁受弯性能的贡献,开展了木销和竹销连接销合木推出试验研究。研究结果表明:与木销连接相比,竹销连接的抗滑移刚度更高且延性更好;销合木梁的受弯性能介于无销接叠合木梁和胶合木梁之间,其组合效率为0.11~0.15;随层板数量的增加,梁截面的增高使销合木梁的抗弯性能显著上升;减小销间距对销合木梁的抗弯承载力与刚度均有一定的提升作用。采用欧洲规范5中的γ法预测销合木梁的抗弯刚度时结果偏大,因此认为对销合木梁的抗弯刚度进行计算时须对销连接的滑移刚度进行折减。

接骨丹片质量标准提升研究

目的 提升接骨丹片的质量标准。方法 采用薄层色谱法鉴别制剂中的制马钱子和大黄;采用高效液相色谱法同时测定马钱子碱和士的宁的含量,色谱柱为Kromasil 100-5-C_(18)柱(250 mm×4.6 cm,5μm),流动相为乙腈-0.01 mol/L庚烷磺酸钠与0.02 mol/L磷酸二氢钾等量混合溶液进行梯度洗脱,流速为1.0 mL/min,检测波长为260 nm,柱温为30℃,进样量为10μL。结果 制马钱子、大黄的薄层色谱图斑点清晰,分离度高,且阴性对照无干扰。马钱子碱和士的宁的质量浓度分别在1.46~116.73μg/mL和1.60~128.30μg/mL范围内与峰面积线性关系良好(r=0.999 5,0.999 7,n=6);精密度、重复性、稳定性试验结果的RSD均小于2.0%(n=6);平均加样回收率分别为97.28%和96.23%,RSD分别为1.16%和1.36%(n=6)。结论 该方法专属性好,结果准确、可靠,可用于接骨丹片的质量评价。

高效液相色谱法测定醋酸氟卡尼片的含量

目的 建立醋酸氟卡尼片的含量测定方法。方法 通过高效液相色谱法,采用Alltima C18色谱柱(150 mm×4.6 mm,5μm),流动相为乙腈-0.02 mol·L^(-1)磷酸二氢铵溶液(含0.2%三乙胺)(用磷酸调至pH 3.0)(35∶65),流速为1.0 mL·min^(-1),检测波长为300 nm,柱温为30℃。结果 醋酸氟卡尼在196.0~588.0μg·mL^(-1)与峰面积呈良好的线性关系,相关系数为1.000;精密度、重复性和稳定性考察RSD均小于1.0%;低、中、高浓度的平均回收率在98.79%~99.20%,RSD均<1.0%。结论 该方法准确、简单、快速,能够用于醋酸氟卡尼片的含量测定。