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海藻鹧鸪菜化学成分的研究 总被引:7,自引:0,他引:7
海藻鹧鸪菜(CaloglosaLeprieuri,J.Agrardh)种属于红藻松节科,民间广泛用作驱虫药物.有关鹧鸪菜的化学成分报道很少[1,2],已知有甾醇、甘露醇.为了进一步寻找其生理活性物质,我们对采自于中国南海西沙群岛海域样品的化学成分进行... 相似文献
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缬草根化学成分的研究 总被引:7,自引:0,他引:7
本文报道了湖南花坦县产的缬草根的化学成分,用气相色谱-色谱-计算机联用和波谱技术鉴定了缬草根中的44个组分,其中乙酸里哪醇酯,2-蒈烯,马拶铃烯,瓦伦烯,香橙烯,愈创木烯,异尼醇,乙酸金合欢酯,邻苯二甲酸二异辛酯,6,13-二甲基-十四烷酸和2-甲基十六烷酸甲酯等化合物是在缬草根中首次发现的,对缬草根中的氨基酸和微量元素也进行了测定。 相似文献
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超高效液相色谱串联质谱法同时测定马尾藻中4种内源性植物激素 总被引:1,自引:0,他引:1
建立了利用超高效液相串联质谱法(UPLC-MS/MS)同时测定马尾藻中4种植物激素(吲哚乙酸、吲哚丁酸、脱落酸、玉米素)的方法.马尾藻样品经过70%甲醇提取后,经PCX+PAX固相小柱净化,使用反相C18色谱柱分离.以5 mmol/L乙酸铵(含0.01%甲酸)和甲醇作为流动相进行梯度洗脱,采用多反应离子监测模式(MRM)分析测定.在0.01 ~ 1.0 μg/mL内,各种植物激素的相关系数均大于0.9990.4种植物激素的回收率为84.3%~102.1%,相对标准偏差为1.1%~6.4%.本方法的检出限为0.025~0.2μg/kg. 相似文献
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臭灵丹化学成分研究II 总被引:7,自引:0,他引:7
从臭灵丹(LaggeraPterodonta(DC)Benth)地上部分水煎浓缩液的氯仿提取液中,分离出四个化合物(1-4),1和2为倍半萜化合物,3和4为黄酮化合物,经紫外光谱、红外光谱、核磁共振^1H谱、^1^3C谱、^1H-^1Hcosy谱及质谱测定,分别为臭灵丹酮酸、冬青酸、洋艾素和金腰素乙。化合物1具有桉烷型倍半萜结构,为Δ^4^,^1^1-桉双烯-3-酮-13-酸,它是一新化合物。 相似文献
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Thealgaeproducedmanyinterestingpharmacologicalandbiologicalactivitymetabolitessuchasantibacterium.antineoplastic.anticancerandantimicrobialactivitiescompound'-'.Moreandmorechemistandbiologistpayattentiontothecollstituentsofthealgae.ThealgaSal'gassunl1)achedcollectedfromtheSouthChinaSeahasbeenstudiedandcompoundIwasisolated.FigureI-shestructureof1Theethanole\tractofalgaSul'gassll))]1)uk'hel/waselutedb}'silicagelusingpetroleunletherx"itllincreasingamountsofethy'lacetateaseluent.Thefractionobt… 相似文献
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报道从中国南海网胰藻Hydroclathrus clathratus中分离得到3个单体化合物,经过MS,IR,1HNMR,13CNMR(DEPT),HMQC和HMBC等波谱技术鉴定为:(6R,7aS)-6-羟基-4,4,7a-三甲基-2,4,5,6,7,7a-六氢苯并呋喃-2-酮(1),1-(2-脱氧-β-D-呋喃核糖)-5-甲基-1,2,3,4-四氢嘧啶-2,4-二酮(2),尿嘧啶(3),并通过X射线单晶衍射实验确定化合物1的立体结构,其中化合物1是首次从自然界中分离得到. 相似文献
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海绵Polymastia Sobustia的化学成份研究 总被引:10,自引:0,他引:10
首次报道从中国南海海绵Polymastiasobustia中分离得到5个纯化合物,经过MS,IR,1^HNMR,13^CNMR(DEPT),HMQC和HMBC等波谱技术鉴定为:豆甾-5-烯-7-羰基-3β-甾醇(1),N-(1-羟甲基-2,6-二羟基)十七烷基-5-羟基二十四脂肪酰胺(2),胸腺嘧啶(3),尿嘧啶(4),对羟基苯甲酸(5);其中化合物1和化合物2为新化合物。 相似文献
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采用电感耦合等离子体原子发射光谱仪(ICP—AES)对温州地区野生和人工养殖鼠尾藻中11种微量元素的含量进行了测定。结果表明,鼠尾藻中钙、镁、铁、锌、锰、铜的含量丰富,温州地区野生和人工养殖的鼠尾藻所含各种微量元素存在差异,为鼠尾藻的进一步的开发利用提供科学依据。 相似文献
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The inhibition by 20 organotin compounds (R n SnX4− n ), which included some newly synthesized pesticides, of the growth of two green algae ( Scenedesmus obliquus and Platymonas sp.) was studied. The influence of the counterion X group on the toxicity of organotins was discussed. The destruction of submicrostructures of the algal cell by organotins was viewed by micrography and electron microscope scanning. It was found that the toxicity of the organotins varied significantly according to their substitution. The order of toxicity is tri- ≫ di- ⩾ mono-organotins. Within the same substituent series, the toxicity depends on the properties of both R and X groups. The larger and the more lipophilic the R group, the more toxic is the organotin. The influence of the X group is more complex: when X is a small easily ionizable group, it has little effect on the toxicity; however, when it is a large organic group, it does change the bioactivity of the organotin. Large organic groups may influence the polarizability of the central tin atom, and so change the toxicity of organotins. 相似文献
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Ho Duc Cuong Thanh Thi Thu Thuy Tran Thu Huong Bui Minh Ly Tran Thi Thanh Van 《Natural product research》2015,29(5):411-415
The aim of this study is to elucidate the structure and investigate the hypolipidaemic activity of a fucoidan extracted from brown seaweed Sargassum henslowianum collected at Hai Van–Son Cha peninsula, Hue province, Vietnam by using tandem electrospray ionisation mass spectrometry. The results demonstrated that the fucoidan has α(1 → 3)-linked l-fucopyranose backbone and sulphate groups occupied mostly at C-2, C-4 and sometimes at C-3 position of fucose residues. The results of in vivo bioactivity examination revealed that the fucoidan in the dose of 100 mg/kgP/day by oral administration helped decrease cholesterol, triglyceride and LDL-cholesterol levels on obese mice. 相似文献
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Picardo MC de Melo Ferreira AC Augusto da Costa AC 《Applied biochemistry and biotechnology》2006,134(3):193-206
In the present work, the biosorption of radioactive thorium was investigated using a dry biomass of Sargassum filipendula as the biosorbent material. Radioactive solutions containing between 2.0 and 500.0μg thorium were tested by biosorption with
S. filipendula, yielding uptake capacities from 20 to 100%, depending on the concentration of the solution. Kinetic studies indicated that
equilibrium between the thorium solution and the solid fraction was achieved after three hours of contact and that a second-order
model could express the equilibrium kinetics. In order to investigate the maximum biosorption capacity of the biomass an isotherm
was done, based on the experimental data, which revealed the maximum uptake capacity to be 2.59 μmol thorium/g biomass. The
experimental data fitted well to a Langmuir model, which provided a good correlation between the experimental and predicted
thorium uptake values. 相似文献