The characteristics of residual soils are very different from those of sedimentary soils.Although the strength characteristics of sedimentary soils have been studied extensively,the shear strength characteristics of g...The characteristics of residual soils are very different from those of sedimentary soils.Although the strength characteristics of sedimentary soils have been studied extensively,the shear strength characteristics of granitic residual soils(GRS)subjected to the weathering of parent rocks have rarely been investigated.In this study,the shear strength characteristics of GRS in the Taishan area of southeast China(TSGRS)were studied by field and laboratory tests.The field tests consisted of a cone penetration test(CPT),borehole shear test(BST),self-boring pressuremeter test(SBPT),and seismic dilatometer Marchetti test(SDMT).The shortcomings of laboratory testing are obvious,with potential disturbances arising through the sampling,transportation,and preparation of soil samples.Due to the special structure of GRS samples and the ease of disturbance,the results obtained from laboratory tests were generally lower than those obtained from situ tests.The CPT and scanning electron microscopy(SEM)results indicated significant weathering and crustal hardening in the shallow TSGRS.This resulted in significant differences in the strength and strength parameters of shallow soil obtained by the BST.Based on the SDMT and SBPT results,a comprehensive evaluation method of shear strength for TSGRS was proposed.The SBPT was suitable for evaluating the strength of shallow GRS.The material index(ID)and horizontal stress index(KD)values obtained by the SDMT satisfied the empirical relationship proposed by Marchetti based on the ID index,and were therefore considered suitable for the evaluation of the shear strength of deep GRS.展开更多
目的应用网络药理学方法探究川芎-当归药对的主要活性成分、靶点和药理作用机制。方法研究时间为2020年9—12月。首先以“川芎”“当归”为关键词,在TCMSP 2.3数据库中检索药材的成分、靶点和对应疾病数据,构建“药物-成分靶点-疾病”网...目的应用网络药理学方法探究川芎-当归药对的主要活性成分、靶点和药理作用机制。方法研究时间为2020年9—12月。首先以“川芎”“当归”为关键词,在TCMSP 2.3数据库中检索药材的成分、靶点和对应疾病数据,构建“药物-成分靶点-疾病”网络,进行基因本体(gene ontology,GO)分类富集分析、京都基因和基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路富集分析,探究“川芎-当归”药对作用机制。结果“药物-成分-靶点-疾病”网络包含2个药物、10个活性成分,71个作用靶点,191种疾病。关键靶点涉及环氧化酶2(PTGS2)、过氧化物酶体增生激活受体γ(PPARG)、雌激素受体(ESR1)、β2肾上腺素能受体(ADRB2)、周期蛋白依赖激酶2(CDK2)、热休克蛋白90(HSP90)、促分裂原活化蛋白激酶14(MAPK14)、胆碱能受体2(CHRM2)、5羟色胺受体2A(HTR2A)、凝血因子Ⅱ受体(F2R)、盐皮质激素受体(NR3C2)、内皮型一氧化氮合酶(NOS3)等,关键疾病涉及疼痛、心血管疾病、乳腺癌、阿尔茨海默病、炎症、癌症、焦虑症、精神分裂症、前列腺癌、实体肿瘤、脑损伤等。GO富集分析得到237个条目,包括生物过程178个,分子功能26个,细胞组成33个。通路富集分析包含66条通路,主要涉及神经活性配体-受体相互作用、钙离子信号通道、癌症通路、5-羟色胺能突触、大肠癌、雌激素信号通路、心肌细胞的肾上腺素能信号、甲状腺激素信号通路、cAMP信号通路、血管内皮生长因子信号通路等。结论“川芎-当归”药对中多个成分作用于多个靶点和通路,对疼痛、心血管疾病、乳腺癌、阿尔茨海默病、炎症、癌症等多种疾病均一定的治疗作用。展开更多
基金the funding support from the National Natural Science Foundation of China(Grant No.51709290)the Key Scientific Research Project of colleges and universities in Henan Province-Special Project of Basic Research(Grant No.20zx009)the Key Research Projects of Higher Education Institutions in Henan Province(Grant No.22A580008).
文摘The characteristics of residual soils are very different from those of sedimentary soils.Although the strength characteristics of sedimentary soils have been studied extensively,the shear strength characteristics of granitic residual soils(GRS)subjected to the weathering of parent rocks have rarely been investigated.In this study,the shear strength characteristics of GRS in the Taishan area of southeast China(TSGRS)were studied by field and laboratory tests.The field tests consisted of a cone penetration test(CPT),borehole shear test(BST),self-boring pressuremeter test(SBPT),and seismic dilatometer Marchetti test(SDMT).The shortcomings of laboratory testing are obvious,with potential disturbances arising through the sampling,transportation,and preparation of soil samples.Due to the special structure of GRS samples and the ease of disturbance,the results obtained from laboratory tests were generally lower than those obtained from situ tests.The CPT and scanning electron microscopy(SEM)results indicated significant weathering and crustal hardening in the shallow TSGRS.This resulted in significant differences in the strength and strength parameters of shallow soil obtained by the BST.Based on the SDMT and SBPT results,a comprehensive evaluation method of shear strength for TSGRS was proposed.The SBPT was suitable for evaluating the strength of shallow GRS.The material index(ID)and horizontal stress index(KD)values obtained by the SDMT satisfied the empirical relationship proposed by Marchetti based on the ID index,and were therefore considered suitable for the evaluation of the shear strength of deep GRS.
文摘目的应用网络药理学方法探究川芎-当归药对的主要活性成分、靶点和药理作用机制。方法研究时间为2020年9—12月。首先以“川芎”“当归”为关键词,在TCMSP 2.3数据库中检索药材的成分、靶点和对应疾病数据,构建“药物-成分靶点-疾病”网络,进行基因本体(gene ontology,GO)分类富集分析、京都基因和基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路富集分析,探究“川芎-当归”药对作用机制。结果“药物-成分-靶点-疾病”网络包含2个药物、10个活性成分,71个作用靶点,191种疾病。关键靶点涉及环氧化酶2(PTGS2)、过氧化物酶体增生激活受体γ(PPARG)、雌激素受体(ESR1)、β2肾上腺素能受体(ADRB2)、周期蛋白依赖激酶2(CDK2)、热休克蛋白90(HSP90)、促分裂原活化蛋白激酶14(MAPK14)、胆碱能受体2(CHRM2)、5羟色胺受体2A(HTR2A)、凝血因子Ⅱ受体(F2R)、盐皮质激素受体(NR3C2)、内皮型一氧化氮合酶(NOS3)等,关键疾病涉及疼痛、心血管疾病、乳腺癌、阿尔茨海默病、炎症、癌症、焦虑症、精神分裂症、前列腺癌、实体肿瘤、脑损伤等。GO富集分析得到237个条目,包括生物过程178个,分子功能26个,细胞组成33个。通路富集分析包含66条通路,主要涉及神经活性配体-受体相互作用、钙离子信号通道、癌症通路、5-羟色胺能突触、大肠癌、雌激素信号通路、心肌细胞的肾上腺素能信号、甲状腺激素信号通路、cAMP信号通路、血管内皮生长因子信号通路等。结论“川芎-当归”药对中多个成分作用于多个靶点和通路,对疼痛、心血管疾病、乳腺癌、阿尔茨海默病、炎症、癌症等多种疾病均一定的治疗作用。
