利用试验生态学方法,研究3-羟基丁酸对雨生红球藻光系统Ⅱ(photosystemⅡ,PSⅡ)光化学活性与色素合成的影响。结果发现,3-羟基丁酸对雨生红球藻PSⅡ光反应中心造成胁迫损伤,细胞PSⅡ光化学最大光能转化效率(Fv/Fm)、有效光能转化效率(Yi...利用试验生态学方法,研究3-羟基丁酸对雨生红球藻光系统Ⅱ(photosystemⅡ,PSⅡ)光化学活性与色素合成的影响。结果发现,3-羟基丁酸对雨生红球藻PSⅡ光反应中心造成胁迫损伤,细胞PSⅡ光化学最大光能转化效率(Fv/Fm)、有效光能转化效率(Yield)和表观电子传递速率(electron transfer rate,ETR)的参数均出现不同程度降低,其中0.02、0.10μg/L处理组的作用最明显;3-羟基丁酸造成雨生红球藻叶绿素a含量波动变化并最终下降至较低水平;3-羟基丁酸能够促进雨生红球藻合成并积累虾青素,其中0.01μg/L浓度的促进作用最强,虾青素最高产量为7.57 mg/L;3-羟基丁酸影响了雨生红球藻自身资源在光合作用与抗逆合成之间的权衡分配。研究结果为使用3-羟基丁酸作为外源诱导物促进雨生红球藻生产虾青素提供了依据。展开更多
AIM: To search for new photosensitizers for photodynamic therapy (PDT) of cancer. METHODS: Chlorin f methyl ether (1) is synthesized via addition and nucleophilic substitution reaction of 2 vinyl of chlorin f (3) whic...AIM: To search for new photosensitizers for photodynamic therapy (PDT) of cancer. METHODS: Chlorin f methyl ether (1) is synthesized via addition and nucleophilic substitution reaction of 2 vinyl of chlorin f (3) which was prepared through acidic and alkaline oxidative degradation using silkworm excrement crude chlorophyll extracts as starting material. RESULTS: Compounds 1 and 2 are new compounds. Preliminary sensitizing effects on photooxidation of NADPH in D 2O and photodynamic effects for transplanted sarcoma S 180 in mice of compound 1 were shown to be stronger than those of hematoporphyrin derivative (HpD) and compound 3. CONCLUSION: It is suggested that compound 1 is possible to be developed as a new photosensitizer for PDT of cancer.展开更多
文摘利用试验生态学方法,研究3-羟基丁酸对雨生红球藻光系统Ⅱ(photosystemⅡ,PSⅡ)光化学活性与色素合成的影响。结果发现,3-羟基丁酸对雨生红球藻PSⅡ光反应中心造成胁迫损伤,细胞PSⅡ光化学最大光能转化效率(Fv/Fm)、有效光能转化效率(Yield)和表观电子传递速率(electron transfer rate,ETR)的参数均出现不同程度降低,其中0.02、0.10μg/L处理组的作用最明显;3-羟基丁酸造成雨生红球藻叶绿素a含量波动变化并最终下降至较低水平;3-羟基丁酸能够促进雨生红球藻合成并积累虾青素,其中0.01μg/L浓度的促进作用最强,虾青素最高产量为7.57 mg/L;3-羟基丁酸影响了雨生红球藻自身资源在光合作用与抗逆合成之间的权衡分配。研究结果为使用3-羟基丁酸作为外源诱导物促进雨生红球藻生产虾青素提供了依据。
文摘AIM: To search for new photosensitizers for photodynamic therapy (PDT) of cancer. METHODS: Chlorin f methyl ether (1) is synthesized via addition and nucleophilic substitution reaction of 2 vinyl of chlorin f (3) which was prepared through acidic and alkaline oxidative degradation using silkworm excrement crude chlorophyll extracts as starting material. RESULTS: Compounds 1 and 2 are new compounds. Preliminary sensitizing effects on photooxidation of NADPH in D 2O and photodynamic effects for transplanted sarcoma S 180 in mice of compound 1 were shown to be stronger than those of hematoporphyrin derivative (HpD) and compound 3. CONCLUSION: It is suggested that compound 1 is possible to be developed as a new photosensitizer for PDT of cancer.