A new organic dye, trans-4-[p-(N-hydroxyethyl-N-ethylamino)styryl]-N-methyl- pyridinium p-toluene sulfonate (HEASPS) has been synthesized and its structure has been determined. Pumped with a 1064 nm, 50 ps laser pulse...A new organic dye, trans-4-[p-(N-hydroxyethyl-N-ethylamino)styryl]-N-methyl- pyridinium p-toluene sulfonate (HEASPS) has been synthesized and its structure has been determined. Pumped with a 1064 nm, 50 ps laser pulses, 0.05 mol/L HEASPS/DMF solution showed the two-photon pumped (TPP) output/input efficiency of 9.1% which is higher than that of known TPP laser dyes trans-4-[p-(N-hydroxyethyl-N-methylamino) styryl]-N-methylpyridinium iodide (ASPI) and trans-4-[p-(N-hydroxyethyl-N-methylamino) styryl]-N-methylpyridinium p-toluene sulfonate (HMASPS) at the same experimental conditions.展开更多
[目的]优化暗紫贝母(Fritillaria unibracteata Hsiao et K.C.Hsia)中总生物碱的提取工艺。[方法]在单因素试验基础上,采用正交试验L36(42×32)对暗紫贝母中已知的活性成分总生物碱的提取工艺进行优化。[结果]暗紫贝母中有效成分的...[目的]优化暗紫贝母(Fritillaria unibracteata Hsiao et K.C.Hsia)中总生物碱的提取工艺。[方法]在单因素试验基础上,采用正交试验L36(42×32)对暗紫贝母中已知的活性成分总生物碱的提取工艺进行优化。[结果]暗紫贝母中有效成分的最佳提取工艺为:样品粉末粒径200目,乙醇体积分数75%,提取时间90 min,提取1次。其中,提取次数对提取结果影响极显著(P<0.01);样品粉末粒径对提取效果的影响显著(P<0.05);提取时间和乙醇体积分数对提取效果的影响不显著。[结论]该研究可为暗紫贝母的制剂生产、质量控制、合理利用及开发贝母属植物资源提供科学依据。展开更多
目的建立人字果Dichocarpum dalzielii(Drumm.et Hutch.)W.T.Wang et Hsiao质量标准。方法HPLC法测定木兰花碱含有量,酸性染料比色法测定总生物碱含有量,2015年版《中国药典》法测定水分、总灰分、酸不溶性灰分、醇溶性浸出物含有量。...目的建立人字果Dichocarpum dalzielii(Drumm.et Hutch.)W.T.Wang et Hsiao质量标准。方法HPLC法测定木兰花碱含有量,酸性染料比色法测定总生物碱含有量,2015年版《中国药典》法测定水分、总灰分、酸不溶性灰分、醇溶性浸出物含有量。结果木兰花碱在0.2002~10.01μg范围内线性关系良好(r=0.9999),平均加样回收率为100.70%,RSD为2.9%;总生物碱在4.048~20.24 mg/L范围内线性关系良好(r=0.9998),平均加样回收率为96.70%,RSD为3.6%。12批样品中,木兰花碱、总生物碱、水分、总灰分、酸不溶性灰分、醇溶性浸出物质量分数分别为0.27%~1.49%、3.35%~5.98%、6.45%~8.50%、9.11%~13.35%、0.27%~2.96%、18.41%~25.06%。结论该方法准确可靠,重复性好,可用于人字果的质量控制。展开更多
Chloroplasts and mitochondria contain a family of putative preprotein and amino acid transporters designated PRAT. Here, we analyzed the role of two previously characterized PRAT protein family members, encoded by At3...Chloroplasts and mitochondria contain a family of putative preprotein and amino acid transporters designated PRAT. Here, we analyzed the role of two previously characterized PRAT protein family members, encoded by At3g49560 （HP30） and At5g24650 （HP30-2）, in planta using a combination of genetic, cell biological and biochemical approaches. Expression studies and green fluorescent protein tagging identified HP30-2 both in chloroplasts and mitochondria, whereas HP30 was located exclusively in chloroplasts. Biochemical evidence was obtained for an association of mitochondrial HP30-2 with two distinct protein complexes, one containing the inner membrane translocase TIM22 and the other containing an alternative NAD（P）H dehydrogenase subunit （NDCI） implicated in a respiratory complex 1-1ike electron trans- port chain. Through its association with TIM22, HP30-2 is involved in the uptake of carrier proteins and other, hydrophobic membrane proteins lacking cleavable N H2-terminal presequences, whereas HP30-2＇s interaction with NDC1 may permit controlling mitochondrial biogenesis and activity.展开更多
文摘A new organic dye, trans-4-[p-(N-hydroxyethyl-N-ethylamino)styryl]-N-methyl- pyridinium p-toluene sulfonate (HEASPS) has been synthesized and its structure has been determined. Pumped with a 1064 nm, 50 ps laser pulses, 0.05 mol/L HEASPS/DMF solution showed the two-photon pumped (TPP) output/input efficiency of 9.1% which is higher than that of known TPP laser dyes trans-4-[p-(N-hydroxyethyl-N-methylamino) styryl]-N-methylpyridinium iodide (ASPI) and trans-4-[p-(N-hydroxyethyl-N-methylamino) styryl]-N-methylpyridinium p-toluene sulfonate (HMASPS) at the same experimental conditions.
基金supported by the Chaire d’Excellence Program of the French Ministry of National Education and Research(to CR)
文摘Chloroplasts and mitochondria contain a family of putative preprotein and amino acid transporters designated PRAT. Here, we analyzed the role of two previously characterized PRAT protein family members, encoded by At3g49560 （HP30） and At5g24650 （HP30-2）, in planta using a combination of genetic, cell biological and biochemical approaches. Expression studies and green fluorescent protein tagging identified HP30-2 both in chloroplasts and mitochondria, whereas HP30 was located exclusively in chloroplasts. Biochemical evidence was obtained for an association of mitochondrial HP30-2 with two distinct protein complexes, one containing the inner membrane translocase TIM22 and the other containing an alternative NAD（P）H dehydrogenase subunit （NDCI） implicated in a respiratory complex 1-1ike electron trans- port chain. Through its association with TIM22, HP30-2 is involved in the uptake of carrier proteins and other, hydrophobic membrane proteins lacking cleavable N H2-terminal presequences, whereas HP30-2＇s interaction with NDC1 may permit controlling mitochondrial biogenesis and activity.
