This study presents the synthesis of three dinuclear cobalt complexes based on three imine derivatives:bis-[4-(2-pyridylmethyleneamino)-phenyl]thioether(L1),bis-[4-(2-pyridylmethyleneamino)-phenyl]ether(L2),and bis-[4...This study presents the synthesis of three dinuclear cobalt complexes based on three imine derivatives:bis-[4-(2-pyridylmethyleneamino)-phenyl]thioether(L1),bis-[4-(2-pyridylmethyleneamino)-phenyl]ether(L2),and bis-[4-(2-pyridylmethyleneamino)-phenyl]methane(L3).Single-crystal X-ray diffraction analysis reveals that the complexes[Co_(2)(L1)3](ClO_(4))4·2CH_(3)CN(1),[Co_(2)(L2)3](ClO_(4))4·2CH_(3)OH(2),and[Co_(2)(L3)3](ClO_(4))4·2CH_(3)OH(3)all exhibit a dinuclear structure.Magnetic test results show that complex 3 exhibited irreversible SCO behavior induced by loss of solvent at 300 K,with the average Co-N bond length increasing from 0.2139(3)to 0.2153(3)nm.Meanwhile,the desolvated complex 3 exhibited paramagnetic behavior similar to that of complexes 1 and 2.Variable-temperature UV-Vis spectroscopic studies also indicate that complex 3 undergoes a solvent-loss-induced spin-state transition.CCDC:2347354,1(120 K);2347355,2(120 K);2347356,3(120 K);2347357,3(400 K).展开更多
【目的】为阐明哺乳动物雷帕霉素靶点(mammalian target of Rapamycin,mTOR)信号通路在调控猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)复制过程中的作用,探索防控该病传染的新途径。【方法】P...【目的】为阐明哺乳动物雷帕霉素靶点(mammalian target of Rapamycin,mTOR)信号通路在调控猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)复制过程中的作用,探索防控该病传染的新途径。【方法】PRRSV感染猪肺泡巨噬细胞(porcine alveolar macrophage,PAMs)24 h后,用蛋白质印迹法检测mTOR信号通路下游信号分子的表达水平及磷酸化水平。【结果】在PRRSV感染PAMs后,mTOR、eIF4E结合蛋白1(eukaryotic initiation factor 4E binding protein 1,4EBP1)及PS6K的磷酸化水平显著增加,表明PRRSV感染激活了mTOR信号通路。用mTOR特异性抑制剂雷帕霉素(Rapamycin)处理PAMs,发现Rapamycin能够显著抑制PRRSV感染引起的mTOR信号通路下游关键信号分子4EBP1磷酸化,且剂量依赖性和时间依赖性促进了PRRSV的复制。【结论】mTOR信号通路参与调控PRRSV的复制,Rapamycin对4EBP1磷酸化有抑制作用,对PRRSV的复制有促进作用。该研究为后续进一步探索PRRSV复制的翻译起始机制奠定基础。展开更多
[目的]明确尖镰孢菌种内遗传多样性与亲缘关系为尖镰孢菌的分类鉴定及该类病害综合防控提供理论依据。[方法]本试验利用筛选出的12对SRAP引物,对40株尖镰孢菌进行PCR扩增,用POPGENE Version 1.32软件计算遗传多样性参数,用NTSYS-pc Vers...[目的]明确尖镰孢菌种内遗传多样性与亲缘关系为尖镰孢菌的分类鉴定及该类病害综合防控提供理论依据。[方法]本试验利用筛选出的12对SRAP引物,对40株尖镰孢菌进行PCR扩增,用POPGENE Version 1.32软件计算遗传多样性参数,用NTSYS-pc Version 2.10s软件对供试菌株进行聚类分析与主成分分析。[结果]共扩增出125个谱带,多态性位点比例达100%,平均每对引物产生多态性条带10.4条。供试菌株的平均Nei's基因多样性指数(H)和Shannon信息指数(I)分别为0.1876和0.3139。晋中地区菌株的Nei's基因多样性指数和Shannon's指数均最大(0.172,0.2876),遗传分化水平最高,多样性最丰富。地理群体间遗传分化系数(Gst)和基因流(Nm)分别为0.3106、1.1098,省内3个居群间的遗传距离较其与河北居群间的遗传距离近,表明4个尖镰孢菌群体间存在一定的遗传分化,群体内遗传多样性大于群体间的多样性。地理群体间遗传距离与地理距离存在一定的相关性。聚类与主成分分析结果表明,菌株SRAP类群划分与其寄主和地理来源没有明显相关性。[结论]供试尖镰孢菌遗传分化明显,但亲缘关系相对较近。展开更多
文摘This study presents the synthesis of three dinuclear cobalt complexes based on three imine derivatives:bis-[4-(2-pyridylmethyleneamino)-phenyl]thioether(L1),bis-[4-(2-pyridylmethyleneamino)-phenyl]ether(L2),and bis-[4-(2-pyridylmethyleneamino)-phenyl]methane(L3).Single-crystal X-ray diffraction analysis reveals that the complexes[Co_(2)(L1)3](ClO_(4))4·2CH_(3)CN(1),[Co_(2)(L2)3](ClO_(4))4·2CH_(3)OH(2),and[Co_(2)(L3)3](ClO_(4))4·2CH_(3)OH(3)all exhibit a dinuclear structure.Magnetic test results show that complex 3 exhibited irreversible SCO behavior induced by loss of solvent at 300 K,with the average Co-N bond length increasing from 0.2139(3)to 0.2153(3)nm.Meanwhile,the desolvated complex 3 exhibited paramagnetic behavior similar to that of complexes 1 and 2.Variable-temperature UV-Vis spectroscopic studies also indicate that complex 3 undergoes a solvent-loss-induced spin-state transition.CCDC:2347354,1(120 K);2347355,2(120 K);2347356,3(120 K);2347357,3(400 K).
文摘【目的】为阐明哺乳动物雷帕霉素靶点(mammalian target of Rapamycin,mTOR)信号通路在调控猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)复制过程中的作用,探索防控该病传染的新途径。【方法】PRRSV感染猪肺泡巨噬细胞(porcine alveolar macrophage,PAMs)24 h后,用蛋白质印迹法检测mTOR信号通路下游信号分子的表达水平及磷酸化水平。【结果】在PRRSV感染PAMs后,mTOR、eIF4E结合蛋白1(eukaryotic initiation factor 4E binding protein 1,4EBP1)及PS6K的磷酸化水平显著增加,表明PRRSV感染激活了mTOR信号通路。用mTOR特异性抑制剂雷帕霉素(Rapamycin)处理PAMs,发现Rapamycin能够显著抑制PRRSV感染引起的mTOR信号通路下游关键信号分子4EBP1磷酸化,且剂量依赖性和时间依赖性促进了PRRSV的复制。【结论】mTOR信号通路参与调控PRRSV的复制,Rapamycin对4EBP1磷酸化有抑制作用,对PRRSV的复制有促进作用。该研究为后续进一步探索PRRSV复制的翻译起始机制奠定基础。
文摘[目的]明确尖镰孢菌种内遗传多样性与亲缘关系为尖镰孢菌的分类鉴定及该类病害综合防控提供理论依据。[方法]本试验利用筛选出的12对SRAP引物,对40株尖镰孢菌进行PCR扩增,用POPGENE Version 1.32软件计算遗传多样性参数,用NTSYS-pc Version 2.10s软件对供试菌株进行聚类分析与主成分分析。[结果]共扩增出125个谱带,多态性位点比例达100%,平均每对引物产生多态性条带10.4条。供试菌株的平均Nei's基因多样性指数(H)和Shannon信息指数(I)分别为0.1876和0.3139。晋中地区菌株的Nei's基因多样性指数和Shannon's指数均最大(0.172,0.2876),遗传分化水平最高,多样性最丰富。地理群体间遗传分化系数(Gst)和基因流(Nm)分别为0.3106、1.1098,省内3个居群间的遗传距离较其与河北居群间的遗传距离近,表明4个尖镰孢菌群体间存在一定的遗传分化,群体内遗传多样性大于群体间的多样性。地理群体间遗传距离与地理距离存在一定的相关性。聚类与主成分分析结果表明,菌株SRAP类群划分与其寄主和地理来源没有明显相关性。[结论]供试尖镰孢菌遗传分化明显,但亲缘关系相对较近。
