SAPO-5 zeolite supported RuMn was a highly efficient catalyst for the aqueous-phase selective hydrodeoxygenation of guaiacol to cyclohexanol.The optimal catalyst achieved a high cyclohexanol yield of 93.7%at full guai...SAPO-5 zeolite supported RuMn was a highly efficient catalyst for the aqueous-phase selective hydrodeoxygenation of guaiacol to cyclohexanol.The optimal catalyst achieved a high cyclohexanol yield of 93.7%at full guaiacol conversion under mild conditions,with a high TOF of 920 h^(-1).Moreover,the catalyst displayed remarkable performance for the hydrogenation of phenol to cyclohexanol,where a 100%yield of cyclohexanol was obtained at a phenol-to-Ru molar ratio of about 17900.In particular,the catalyst exhibited excellent recyclability and could be recycled for 20 times without obvious activity loss.The as-prepared RuMn/SAPO-5 catalyst exhibited higher performance than most of the reported Rubased catalysts.展开更多
目的阐明藏药长毛风毛菊的药效及化学成分,探讨其有效成分、关键靶点和相关通路,明确其治疗肾性水肿的作用机制。方法将SD大鼠分为空白组、阿霉素诱导肾性水肿模型组,长毛风毛菊给药低剂量组、高剂量组。测定血清生化指标,探讨各组总蛋...目的阐明藏药长毛风毛菊的药效及化学成分,探讨其有效成分、关键靶点和相关通路,明确其治疗肾性水肿的作用机制。方法将SD大鼠分为空白组、阿霉素诱导肾性水肿模型组,长毛风毛菊给药低剂量组、高剂量组。测定血清生化指标,探讨各组总蛋白(total protein,TP)、尿素氮(blood u-rea nitrogen,BUN)、血肌酐(serum creatinine,SCr)、甘油三酯(triglyceride,TG)、总胆固醇(serum total cholestero,TC)、低密度脂蛋白(low density lipoprotein,LDL-C)、高密度脂蛋白(high density lipopro-tein,HDL-C)指标的情况。采用UPLC-Q-TOF-MS/MS技术对藏药长毛风毛菊的化学成分进行分析;在SwissTargetPrediction、GeneCards数据库分别获取长毛风毛菊化学成分靶点和肾性水肿靶点,取交集获得治疗肾性水肿作用靶点;通过STRING数据库进行蛋白互作分析;利用Metascape平台进行gene ontology(GO)功能和京都基因和基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路分析;将药物、靶点等导入到Cytoscape3.7.2构建“药物-成分-靶点-疾病-通路”网络图。筛选出排名靠前的6个基因和12个有效成分,通过分子对接技术验证网络药理预测的准确性,揭示长毛风毛菊治疗肾性水肿的作用机制。结果大鼠血清中TP、HDL-C指标上调,BUN、SCr、TC、TG和LDL-C指标均下调。从藏药长毛风毛菊提取物中共鉴定了71个化合物,包括7个苯丙素类、16个绿原酸类和39个黄酮类等成分。通过预测得出75个长毛风毛菊治疗肾性水肿靶点,GO富集共涉及生物过程、细胞组分、分子功能3个方面,KEGG富集结果显示PI3K/AKT、AGE-RAGE、MAPK等是显著通路。分子对接结果显示,有效成分与关键靶点结合能Vina评分均小于0,高效验证了网络药理预测的准确性。结论该研究基于药效学实验,结合UPLC-Q-TOF-MS/MS鉴定、网络药理学分析和分子对接技术,表明长毛风毛菊能够治疗肾性水肿,可能通过调控PI3K/AKT、AGE-RAGE、MAPK信号通路中TP53、PI3K、AKT等相关靶点来发挥作用。展开更多
Rational design of Zn-containing HZSM-5 zeolite(Zn/HZSM-5)with high reactivity and excellent aromatization performance for olefin aromatization is crucially desired.We develop a new and uncomplicated method to synthes...Rational design of Zn-containing HZSM-5 zeolite(Zn/HZSM-5)with high reactivity and excellent aromatization performance for olefin aromatization is crucially desired.We develop a new and uncomplicated method to synthesize Zn/HZSM-5(IMX/Z5)with superior aromatization performance in the paper.Compared to incipient wetness impregnation(IMP/Z5)and mechanical mixing(MIX/Z5),the asprepared IMX/Z5 presents a higher amount of surface ZnOH^(+)species(2.87%)while keeping identical bulk zinc content.As a result,more surface ZnOH^(+)favor both the aromatization of 1-hexene and cyclohexane dehydrogenation.For the two olefin aromatization pathways(hydrogen transfer and dehydrogenation),it is the first time found both the hydrogen transfer ability and the dehydrogenation ability increase linearly with the amount of surface ZnOH^(+)species while keeping identical bulk zinc content.We believe that the linear relationships are essential to design next generation olefin aromatization catalysts.展开更多
The oxidative desulphurization(ODS)has become mainly popular by rapid catalytic oxidation of dibenzothiophene(DBT)relied on efficient heterogeneous catalyst,V-based catalytic active species were regarded as the potent...The oxidative desulphurization(ODS)has become mainly popular by rapid catalytic oxidation of dibenzothiophene(DBT)relied on efficient heterogeneous catalyst,V-based catalytic active species were regarded as the potential option in the activity-preferred ODS systems.Herein,we reported the redispersion of vanadium oxide(VO_(χ))on the mesoporous silica modified with manganese oxide(Mn_(3)O_(4)) through one progressive insertion approach of metal oxides in the silica.Impressively,mesoporeencaged vanadium-manganese oxides in the silica(VMn-MS)as the admirable output of excellent ODS catalyst was demonstrated compared to other monometal-modified counterparts and one-pot implanted one.The characterization results revealed the post-implanted VO_(χ) species not only deposited around the pre-covered Mn_(3)O_(4) on the mesoporous surface but also inserted the surface layer of Mn_(3)O_(4) inducing the amorphous evolution of aggregated Mn_(3)O_(4) and the reconstruction of final active sites.This integrated approach made the reconstructed active species afford more exposed catalytic sites and the tailored surface redox cycles owing to the electronic communication of V-Mn.The catalytic results demonstrated the excellent catalytic desulphurization efficiency(~100%)during 60 min at 80℃,which made the sulphur content reduce to 6 mg·L^(-1),remarkably superior to other comparative samples.The outstanding catalytic performance of VMn-MS catalyst can be ascribed to the synergistic effect of V-Mn dual metals rendering two different reaction pathways,which includes free-radical reaction and ring-forming reaction,where Mn site acted as active center triggering reactive free radicals which could be further optimized by surrounded V sites around Mn sites to promote the ODS process.展开更多
目的探讨经门静脉胰岛细胞移植(PIT)后,细胞间粘附分子-1(ICAM-1)的表达与移植免疫排斥反应的关系,为胰岛细胞移植术后排斥反应的临床治疗提供理论依据。方法30只Wistar糖尿病大鼠随机分为三组,A组:糖尿病模型组(n=10),不做任何处理;B组...目的探讨经门静脉胰岛细胞移植(PIT)后,细胞间粘附分子-1(ICAM-1)的表达与移植免疫排斥反应的关系,为胰岛细胞移植术后排斥反应的临床治疗提供理论依据。方法30只Wistar糖尿病大鼠随机分为三组,A组:糖尿病模型组(n=10),不做任何处理;B组:生理盐水组(n=10),采用腹腔注射生理盐水2ml/d;C组:免疫抑制剂组(n=10),采用腹腔注射CsA(3mg·kg^-1.d^-1)+MMF(20mg·kg^-1.d^-1);全部采取SD大鼠胰岛细胞→Wistar大鼠糖尿病动物模型。观察:①各组胰岛细胞移植术后第1、4、7、10、30、60天大鼠外周血血糖的变化;②流式细胞仪(Elite Coulter Company US)技术检测胰岛细胞移植术后外周血粘附分子ICAM-1的表达情况;③免疫组化方法检测各组胰岛细胞移植术后第10、60天,肝脏中ICAM-1的表达水平。结果①血糖值变化:术前各组间血糖值比较无统计学差异(P=0.669);B、C组血糖在术后第7或10天达最低水平,之后逐渐上升;任何两组间比较有统计学差异。②外周血ICAM-1的表达情况:术前各组间ICAM-1值比较无统计学差异(P=0.754);术后C组在第7或10天达最低水平,以后逐渐上升,最后接近B组水平;任何两组间比较有统计学差异。③肝脏粘附分子表达:术后10d和术后60d比较:A组(P=0.816)无统计学差异,B组(P=0.855)无统计学差异,C组(P=0.000)有统计学差异;术后10d:任何两组间均存在统计学差异(P<0.05);术后60d:B组与C组无统计学差异,A组同任何组均存在统计学差异(P<0.05)。结论PIT后粘附分子的变化与免疫排斥反应的发生有很大的相关性,进而和移植物功能有一定的相关性,且粘附分子表达水平的升高可以预示免疫排斥反应的发生。展开更多
基金supported by the Zhejiang Provincial Natural Science Foundation of China(LY23B060006 and LY18B060016).
文摘SAPO-5 zeolite supported RuMn was a highly efficient catalyst for the aqueous-phase selective hydrodeoxygenation of guaiacol to cyclohexanol.The optimal catalyst achieved a high cyclohexanol yield of 93.7%at full guaiacol conversion under mild conditions,with a high TOF of 920 h^(-1).Moreover,the catalyst displayed remarkable performance for the hydrogenation of phenol to cyclohexanol,where a 100%yield of cyclohexanol was obtained at a phenol-to-Ru molar ratio of about 17900.In particular,the catalyst exhibited excellent recyclability and could be recycled for 20 times without obvious activity loss.The as-prepared RuMn/SAPO-5 catalyst exhibited higher performance than most of the reported Rubased catalysts.
文摘目的阐明藏药长毛风毛菊的药效及化学成分,探讨其有效成分、关键靶点和相关通路,明确其治疗肾性水肿的作用机制。方法将SD大鼠分为空白组、阿霉素诱导肾性水肿模型组,长毛风毛菊给药低剂量组、高剂量组。测定血清生化指标,探讨各组总蛋白(total protein,TP)、尿素氮(blood u-rea nitrogen,BUN)、血肌酐(serum creatinine,SCr)、甘油三酯(triglyceride,TG)、总胆固醇(serum total cholestero,TC)、低密度脂蛋白(low density lipoprotein,LDL-C)、高密度脂蛋白(high density lipopro-tein,HDL-C)指标的情况。采用UPLC-Q-TOF-MS/MS技术对藏药长毛风毛菊的化学成分进行分析;在SwissTargetPrediction、GeneCards数据库分别获取长毛风毛菊化学成分靶点和肾性水肿靶点,取交集获得治疗肾性水肿作用靶点;通过STRING数据库进行蛋白互作分析;利用Metascape平台进行gene ontology(GO)功能和京都基因和基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路分析;将药物、靶点等导入到Cytoscape3.7.2构建“药物-成分-靶点-疾病-通路”网络图。筛选出排名靠前的6个基因和12个有效成分,通过分子对接技术验证网络药理预测的准确性,揭示长毛风毛菊治疗肾性水肿的作用机制。结果大鼠血清中TP、HDL-C指标上调,BUN、SCr、TC、TG和LDL-C指标均下调。从藏药长毛风毛菊提取物中共鉴定了71个化合物,包括7个苯丙素类、16个绿原酸类和39个黄酮类等成分。通过预测得出75个长毛风毛菊治疗肾性水肿靶点,GO富集共涉及生物过程、细胞组分、分子功能3个方面,KEGG富集结果显示PI3K/AKT、AGE-RAGE、MAPK等是显著通路。分子对接结果显示,有效成分与关键靶点结合能Vina评分均小于0,高效验证了网络药理预测的准确性。结论该研究基于药效学实验,结合UPLC-Q-TOF-MS/MS鉴定、网络药理学分析和分子对接技术,表明长毛风毛菊能够治疗肾性水肿,可能通过调控PI3K/AKT、AGE-RAGE、MAPK信号通路中TP53、PI3K、AKT等相关靶点来发挥作用。
基金the support from the National Natural Science Foundation of China(21838011)。
文摘Rational design of Zn-containing HZSM-5 zeolite(Zn/HZSM-5)with high reactivity and excellent aromatization performance for olefin aromatization is crucially desired.We develop a new and uncomplicated method to synthesize Zn/HZSM-5(IMX/Z5)with superior aromatization performance in the paper.Compared to incipient wetness impregnation(IMP/Z5)and mechanical mixing(MIX/Z5),the asprepared IMX/Z5 presents a higher amount of surface ZnOH^(+)species(2.87%)while keeping identical bulk zinc content.As a result,more surface ZnOH^(+)favor both the aromatization of 1-hexene and cyclohexane dehydrogenation.For the two olefin aromatization pathways(hydrogen transfer and dehydrogenation),it is the first time found both the hydrogen transfer ability and the dehydrogenation ability increase linearly with the amount of surface ZnOH^(+)species while keeping identical bulk zinc content.We believe that the linear relationships are essential to design next generation olefin aromatization catalysts.
基金National Natural Science Foundation of China(No.21908085,21776129,and 21706121)Natural Science Foundation of Jiangsu Province(No.BK20170995 and BK20190961)+1 种基金General Program for University Natural Science Research of Jiangsu Province(No.16KJB530003)the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。
文摘The oxidative desulphurization(ODS)has become mainly popular by rapid catalytic oxidation of dibenzothiophene(DBT)relied on efficient heterogeneous catalyst,V-based catalytic active species were regarded as the potential option in the activity-preferred ODS systems.Herein,we reported the redispersion of vanadium oxide(VO_(χ))on the mesoporous silica modified with manganese oxide(Mn_(3)O_(4)) through one progressive insertion approach of metal oxides in the silica.Impressively,mesoporeencaged vanadium-manganese oxides in the silica(VMn-MS)as the admirable output of excellent ODS catalyst was demonstrated compared to other monometal-modified counterparts and one-pot implanted one.The characterization results revealed the post-implanted VO_(χ) species not only deposited around the pre-covered Mn_(3)O_(4) on the mesoporous surface but also inserted the surface layer of Mn_(3)O_(4) inducing the amorphous evolution of aggregated Mn_(3)O_(4) and the reconstruction of final active sites.This integrated approach made the reconstructed active species afford more exposed catalytic sites and the tailored surface redox cycles owing to the electronic communication of V-Mn.The catalytic results demonstrated the excellent catalytic desulphurization efficiency(~100%)during 60 min at 80℃,which made the sulphur content reduce to 6 mg·L^(-1),remarkably superior to other comparative samples.The outstanding catalytic performance of VMn-MS catalyst can be ascribed to the synergistic effect of V-Mn dual metals rendering two different reaction pathways,which includes free-radical reaction and ring-forming reaction,where Mn site acted as active center triggering reactive free radicals which could be further optimized by surrounded V sites around Mn sites to promote the ODS process.
文摘目的探讨经门静脉胰岛细胞移植(PIT)后,细胞间粘附分子-1(ICAM-1)的表达与移植免疫排斥反应的关系,为胰岛细胞移植术后排斥反应的临床治疗提供理论依据。方法30只Wistar糖尿病大鼠随机分为三组,A组:糖尿病模型组(n=10),不做任何处理;B组:生理盐水组(n=10),采用腹腔注射生理盐水2ml/d;C组:免疫抑制剂组(n=10),采用腹腔注射CsA(3mg·kg^-1.d^-1)+MMF(20mg·kg^-1.d^-1);全部采取SD大鼠胰岛细胞→Wistar大鼠糖尿病动物模型。观察:①各组胰岛细胞移植术后第1、4、7、10、30、60天大鼠外周血血糖的变化;②流式细胞仪(Elite Coulter Company US)技术检测胰岛细胞移植术后外周血粘附分子ICAM-1的表达情况;③免疫组化方法检测各组胰岛细胞移植术后第10、60天,肝脏中ICAM-1的表达水平。结果①血糖值变化:术前各组间血糖值比较无统计学差异(P=0.669);B、C组血糖在术后第7或10天达最低水平,之后逐渐上升;任何两组间比较有统计学差异。②外周血ICAM-1的表达情况:术前各组间ICAM-1值比较无统计学差异(P=0.754);术后C组在第7或10天达最低水平,以后逐渐上升,最后接近B组水平;任何两组间比较有统计学差异。③肝脏粘附分子表达:术后10d和术后60d比较:A组(P=0.816)无统计学差异,B组(P=0.855)无统计学差异,C组(P=0.000)有统计学差异;术后10d:任何两组间均存在统计学差异(P<0.05);术后60d:B组与C组无统计学差异,A组同任何组均存在统计学差异(P<0.05)。结论PIT后粘附分子的变化与免疫排斥反应的发生有很大的相关性,进而和移植物功能有一定的相关性,且粘附分子表达水平的升高可以预示免疫排斥反应的发生。
