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竹红菌甲素

竹红菌甲素的相关文献在1981年到2022年内共计104篇,主要集中在化学、药学、中国医学 等领域,其中期刊论文80篇、会议论文3篇、专利文献235099篇;相关期刊50种,包括生物物理学报、药物分析杂志、影像科学与光化学等; 相关会议2种,包括第十二届全国光化学学术讨论会、'98全国天然产物及香精香料学术会议等;竹红菌甲素的相关文献由244位作者贡献,包括周家宏、冯玉英、顾晓天等。

竹红菌甲素—发文量

期刊论文>

论文:80 占比:0.03%

会议论文>

论文:3 占比:0.00%

专利文献>

论文:235099 占比:99.96%

总计:235182篇

竹红菌甲素—发文趋势图

竹红菌甲素

-研究学者

  • 周家宏
  • 冯玉英
  • 顾晓天
  • 魏少华
  • 吴晓红
  • 张红雨
  • 张志义
  • 李聪
  • 林海萍
  • 王雪松
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 樊炎迪; 赵学; 吴酬飞; 王冰璇; 汪石莹; 沈佳; 桂鹏; 袁静; 林海萍
    • 摘要: 为探究竹黄菌Shiraia bambuscola代谢产物竹红菌甲素(HA)对番茄灰霉病菌Botrytis cinerea的关键抑菌因子,依据活性氧淬灭原理,测定了HA的光反应类型;采用单线态氧(~1O_2)捕捉法、芬顿试剂法和核黄素光化学反应法,分析了单线态氧(~1O_2)、羟基自由基(·OH)和超氧阴离子自由基(O_2^(-·)) 3种活性氧浓度与HA对番茄灰霉病菌抑制率的相关性。结果表明:HA是通过光动力作用中的2种光反应类型(TypeⅠ和TypeⅡ)产生的活性氧对番茄灰霉病菌起到抑制作用,其中主要以TypeⅡ为主。~1O_2、·OH和O_2^(-·)的浓度与其对番茄灰霉病菌的抑制率均呈极显著的线性正相关,3种活性氧均为关键抑菌因子。经回归分析,获得最优回归模型为:Y=0.055 9+0.814 5X_1+0.002X_2+0.738 4X_3,其中Y为抑制率,X_1、X_2和不分别为~1O_2、·OH和O_2^(-·)的浓度,R2=0.9619,可见三者抑菌能力顺序为~1O_2>O_2^(-·)>·OH。本论文首次提出HA抑制番茄灰霉病菌的关键因子,为HA作用机理的研究奠定了基础,并为其作为光活化农药的开发利用提供了理论依据。
    • 高波; 刘卫; 张举成; 包丽林; 李河; 全舒舟
    • 摘要: 本实验利用吸收光谱法分析金黄色葡萄球菌、肠球菌、枯草芽孢杆菌、大肠杆菌和感受态大肠杆菌对天然光敏剂竹红菌甲素(Hypocrellins A,HA)的吸附能力.结果显示,金黄色葡萄球菌、枯草芽孢杆菌和肠球菌这三种革兰氏阳性细菌对HA具有明显的吸附作用,对革兰氏阴性细菌大肠杆菌没有明显的吸附作用;然而,CaCl2制备的感受态大肠杆菌对HA显示出明显的吸附作用.这证明HA对革兰氏阳性菌和革兰氏阴性菌不同抑菌作用与细胞通透性有关,也提示通过改变革兰氏阴性菌细胞通透性可有效提高HA的抑菌效果.
    • 袁秀雪; 陈恩懿; 肖梦思; 赵传峰; 周家宏
    • 摘要: 通过紫外-可见吸收光谱、瞬态荧光光谱以及圆二色谱来比较光疗药物竹红菌甲素及铂竹红菌甲素复合物与牛血红蛋白的相互作用。结果表明,虽然竹红菌甲素及铂竹红菌甲素复合物与牛血红蛋白的反应机理都是基于电子转移的静态猝灭,但是铂竹红菌甲素复合物与牛血红蛋白的反应不仅要比竹红菌甲素强,而且反应后牛血红蛋白的微环境和构像的改变也要大于竹红菌甲素。%The interaction mechanisms of Hypocrellin A(HA)and its platinum complex(Pt-HA)with bovine hemoglobin (BHb)were compared by ultraviolet-visible(UV-Vis)absorption,time-resolved fluorescence spectra,circular dichroism (CD)and induced circular dichroism(ICD)spectra,respectively. The UV-Vis results revealed that both HA and Pt-HA could interact with BHb and the latter interaction was stronger than HA. In addition,quenching mechanism of HA and Pt-HA were both static process,which were ascribed to the electron transfer. Moreover,CD and ICD spectrum revealed that the microenvironment and conformation of BHb were changed after conjugation with HA and Pt-HA,as the latter al⁃tered more acute. Finally,the comparison results demonstrated that the interaction of Pt-HA and BHb was stronger and more stable than HA.
    • 赵学; 李朋举; 朱旭伟; 张璞瑜; 张爽; 蒋达青; 娄钧翼; 林海萍
    • 摘要: 为研究竹红菌甲素(HA)对番茄灰霉病菌的抑制作用,分别采用菌丝生长速率法、电导率法、紫外分光光度法和电镜观察法研究了HA对番茄灰霉病菌抑制率以及其对电导率、蛋白质和核酸相对泄漏度、菌丝形态与超微结构的影响。结果表明:在黑暗条件下,HA对番茄灰霉病菌无明显抑制作用;但在12 000 lx光照条件下,抑菌作用显著,EC50值为17.16 mg/L,且随着HA浓度上升,抑菌率呈极显著增加趋势,40 mg/L下抑菌率达73.9%;番茄灰霉病菌细胞相对电导率、蛋白质与核酸相对泄漏度随HA浓度上升而明显升高;电镜观察可见,经34.32 mg/L的HA处理后,大多数菌丝出现畸形、膨大或缢缩等现象,细胞器几乎全部消失,细胞内出现大面积空腔,细胞遭到严重破坏。研究结果可为HA开发成绿色高效生物农药提供理论依据。
    • 李朋举; 张媚; 殷红福; 赵学; 朱旭伟; 朱齐超; 林海萍
    • 摘要: 为解决竹红菌甲素(HA)做为光活化农药易降解与难溶于水的瓶颈问题,本文通过振荡培养法制备竹红菌甲素羟丙基-β-环糊精包合物水溶液(HA-HP-β-CD),采用紫外分光光度法测定HA乙醇水溶液(HA-E-W)与HA-HP-β-CD中HA的稳定性;菌丝生长速率法测定两者抑菌率。结果表明,水、氧气和光照均能促进HA降解,环糊精包合能显著提高HA的抑菌率与光热稳定性。26°C、12000 Lx光照处理10 h,HA乙醇溶液(HA-E)、HA-E-W与HA-HP-β-CD中HA保留率分别为92.1%、39.0%与83.6%;HA-E-W去除氧气后HA保留率达99.6%。黑暗条件下26与50°C处理10 h后,HA-E-W中HA保留率分别为94.9%与57.1%,而50°C处理10 h后,HA-HP-β-CD中HA保留率可达95.3%。26°C、12000 Lx处理6 d,浓度10 mg/L的HA-HP-β-CD对苹果腐烂病菌和山核桃干腐病菌的抑菌率分别为93.1%和37.3%,均极显著高于HA-E-W对两种病原菌的抑菌率68.7%和25.4%。可见,环糊精包合是HA绿色农药制备的一种有效方式。
    • 李朋举; 张媚; 殷红福; 赵学; 朱旭伟; 朱齐超; 林海萍
    • 摘要: Hypocrelline A (HA), a light-activated pesticide, is easily degradable and low soluble in water. We used oscillatory culture method to produce HA in an aqueous solution of hydroxypropyl-β-cyclodextrin (HA-HP-β-CD) and to compare the stability of HA in ethanol water (HA-E-W), and HA-HP-β-CD, respectively, via UV spectrophotometry. Laboratory tests showed that water, oxygen, and light could promote degradation of HA, and cyclodextrin inclusion could significantly improve the inhibition rate of Valsa mali and Botryosphaeria dothidea mycelium growth and photo-thermal stability of HA. When treatment was applied at 12000 Lx of light under 26 °C for 10 h, the retention rates of HA in HA-supplemented ethanol solution (HA-E), HA-E-W, and HA-HP-β-CD were 92.1%, 39.0%, and 83.6%respectively. Under a reduced oxygen condition, the HA retention rate in HA-E-W reached 99.6%. While treated under dark conditions at 26 °C and 50 °C for 10 h, the retention rates of HA in HA-E-W were 94.9% and 57.1%, respectively. The retention rate of HA in HA-HP-β-CD was 95.3%after incubation in the dark for 10 h at 50 °C. When exposed to 12000 Lx of light at 26 °C for 6 d, HA-HP-β-CD at a final concentration of 10 mg/L was able to suppress 93.1%and 37.3%of the mycelium growth of V. mali and B. dothidea, respectively. At the same concentration, HA-E-W suppressed 68.7% and 25.4%of the mycelium growth of both pathogens, significantly lower than those treated with HA-HP-β-CD. Data here showed that cyclodextrin is a feasible way to produce HA.%为解决竹红菌甲素(HA)做为光活化农药易降解与难溶于水的瓶颈问题,本文通过振荡培养法制备竹红菌甲素羟丙基-β-环糊精包合物水溶液(HA-HP-β-CD),采用紫外分光光度法测定HA乙醇水溶液(HA-E-W)与HA-HP-β-CD中HA的稳定性;菌丝生长速率法测定两者抑菌率。结果表明,水、氧气和光照均能促进HA降解,环糊精包合能显著提高HA的抑菌率与光热稳定性。26°C、12000 Lx光照处理10 h,HA乙醇溶液(HA-E)、HA-E-W与HA-HP-β-CD中HA保留率分别为92.1%、39.0%与83.6%;HA-E-W去除氧气后HA保留率达99.6%。黑暗条件下26与50°C处理10 h后,HA-E-W中HA保留率分别为94.9%与57.1%,而50°C处理10 h后,HA-HP-β-CD中HA保留率可达95.3%。26°C、12000 Lx处理6 d,浓度10 mg/L的HA-HP-β-CD对苹果腐烂病菌和山核桃干腐病菌的抑菌率分别为93.1%和37.3%,均极显著高于HA-E-W对两种病原菌的抑菌率68.7%和25.4%。可见,环糊精包合是HA绿色农药制备的一种有效方式。
    • 王志津; 何玉英; 崔莲; 张金萍; 王伟; 刘丽丽; 夏爱祥
    • 摘要: Objective To observe and determine the lissue pholodynamic effecl of liposome-delivered hypocrellin A as a pholosensilizer in HeLa cells in vilro. Methods The liposome-delivered hypocrellin A was made and il was Look in the HeLa cells in vilro,and under the lighl of the iodine wolfram lighl after repealed wash by fresh Hank's liquid. To observe the lissue pholodynamic effecl of liposome-delivered hypocrellin A as a pholosensilizer in HeLa cells by the experimented means of comparing with the one only be lighled. Results HeLa cell dealh rales of the experimental groups were significantly higher lhan conlrol groups ( P < 0. 01 ) al differenl lime interval after irradiation. Conclusions Pholodynamic effect of liposome-delivered hypocrellin A as a pholosensitizer in HeLa cells in vilro is definile. Photo-lherapeutic effectiveness of HA is definite and reliable. Probably hypocrellin A is one of the promising and potenlial photosensilizers.%目的 本研究旨在观察及探讨竹红菌甲素(HA)脂质体对体外培养肿瘤细胞的光动力作用.方法 构建HA脂质体,注入体外培养瘤细胞的培养基中,并用新鲜Hank′s液反复冲洗后,于室温下在碘钨灯下照光,通过与单纯照光组、单用HA脂质体组、空白对照组对比的实验方法,观察HA脂质体对体外培养瘤细胞的光动力学作用.结果 注有HA脂质体的培养基中经光照显示HeLa细胞的不同时间段的死亡率比单纯照光组及单用HA脂质体组均高(P<0.05).结论 HA脂质体对培养基中HeLa细胞光动力灭活作用确切.HA结构单一清楚,光动力作用确切可靠,也应是一种具有发展前途的光敏剂.
    • 董婷; 潘魏松; 赵一璐; 雷晓珩; 陈可嘉; 王剑文
    • 摘要: 以紫外(UV)与亚硝基胍诱变的竹黄菌(Shiraia bambusicola)菌株NU12和UV4为出发菌株,60°C处理5 min、紫外(距离30 cm,30 W)照射90s进行双亲原生质体灭活,通过30%聚乙二醇PEG6000介导原生质体融合20 min.结合平板初筛和高效液相色谱( HPLC)分析进行复筛,通过3轮重组融合操作,筛选出6株高产竹红菌甲素的融合株.其中融合菌株FIII - 21的竹红菌甲素产量达到80.4 mg/L,比原始出发菌株提高了58.9%~167.1%,且遗传稳定,具有较高的医药及工业应用价值.%Two mutant strains, I. E. , NU12 and UV4, of Shiraia bambusicola, treated by UV and nitrosog-uanidine mutagenesis were breeding candidates for higher production of hypocrellin A by genome-shuffling. The protoplasts were inactivated by heat at 60 t for 5 min and UV treatment for 90 s, respectively. The inactive protoplasts were fused and regenerated in the presence of polyethylene glycol ( PEG6000, 30% , W/V) for 20 min. The selective plates with hypocrellin pigment for observation and the assay of high performance liquid chromatography were used to screen the mutant strain of higher production of hypocrellin A. After two rounds of genome-shuffling, six strains of mutants with higher yield were obtained. The production of hypocrellin A by mutant Fill-21 reached 80. 4 mg/L, and it increased by 58. 9% -167. 1% than that of the original strains. The production of the mutant was verified to be genetically stable.
    • 黄宝美; 姚程炜; 王志国; 莫金垣
    • 摘要: Capillary electrophoreto-condustometry was applied to the determination of hypocrellin A in Shiraia bambusicola P. Henn, using acetate buffer of 20 mmol . L-1 NH4OAc solution (pH 3. 5, adjusted with 0.1 mol . L-1 HOAc solution) as electrophoretic medium, and 20 kV as separation voltage. Ethanol was added to the buffer solution amounting to 5% by volume to improve solubility of the sample and to control the magnitude and direction of electroosmotic flow. Sample was introduced by siphoning at a height of 20 cm for 10 s. Column-end detection of conductance was adopted in the measurements. Range of linearity was found between 1. 0 and 160. 0 mg . L-1 of hypocrellin A, with detection limit (3S/N) of 0. 5 mg . L-1. Results of recovery test found were ranged from 99. 0% to 100. 2%.%提出了测定竹黄中竹红菌甲素含量的毛细管电泳电导法.用20 mmol·L-1乙酸铵缓冲溶液(用0.1 mol·L-1乙酸溶液调节至pH 3.5)为电泳介质,分离电压为20 kV,采用柱端电导检测,在缓冲溶液中加乙醇至占总体的5%,以改善样品的溶解度并控制电渗流的大小和方向.用虹吸进样,进样高度为20 cm,进样时间为10 s.方法的线性范围为1.0~160.0 mg·L-1,检出限(3S/N)为0.5 mg·L-1.测得方法的回收率在99.0%~100.2%之间.
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