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二亚油酰磷脂酰胆碱分析 总被引:1,自引:0,他引:1
通过HPLC/HPLC-MS研究了二亚油酰磷脂酰胆碱的测定方法,磷脂样品首先经过HPLC分离得到磷脂酰胆碱,该磷脂酰胆碱再进一步通过不同的HPLC系统分离二亚油酰磷脂酰胆碱,并通过标准样品和质谱进行二亚油酰磷脂酰胆碱的定性.定量方法通过标准样品外标法定量,由方法的回收率和精密度试验可知,该方法已用来测定一般磷脂样品和磷脂酰胆碱样品中的二亚油酰磷脂酰胆碱含量. 相似文献
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磷脂酰胆碱水溶液CMC的测定陈鲁生周武姜云生(山东师范大学化学系济南250014)关键词磷脂酰胆碱临界胶束浓度磷脂酰胆碱是一种天然生物两性表面活性物质,也是一种重要的生命物质,具有广泛的用途[1],由于磷脂酰胆碱的水溶性较差,所以较长时间以来对其溶液... 相似文献
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溶血磷脂酰乙醇胺(pLPE)是自然杀伤T细胞(NKT)的内源性抗原。溶血磷脂酰胆碱衍生物(LPC)与CD1d结合被NKT细胞识别并激活NKT细胞。本文以手性甘油醇缩丙酮为起始原料,合成了LPC衍生物(5和6),其结构经1H NMR, 13C NMR, 31P NMR和HR-MS(ESI)确证。研究了5和6〖STBZ〗的免疫活性。结果表明:100 ng·mL-1 6负载mCD1d分子后可刺激2H4细胞释放IL-2因子(32.13±1.56 pg·mL-1),具有潜在的NKT激活性质。 相似文献
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大豆磷脂中磷脂酰胆碱的脂肪酸组成分析 总被引:3,自引:0,他引:3
1 引 言磷脂是生物膜的主要成分 ,是由甘油骨架、极性基团和不饱和脂肪酸组成的脂质类化合物。磷脂种类 (PC ,PE等 )的化学组成决定磷脂的物理特性 ,进而影响生物膜的功能。研究表明 :磷脂脂肪基团中不饱和碳 碳键是决定其相变温度的关键因素 ,同时 ,环境因素影响磷脂的脂肪酸组成 ,随环境温度的变化 ,磷脂的脂肪酸组成也作出相应的调整。因此 ,测定磷脂酰胆碱的脂肪酸组成 ,对研究大豆的遗传性及环境因素对其所造成的影响具有重要意义。磷脂脂肪酸组成的分析已有报道 ,但对于大豆磷脂酰胆碱脂肪酸组成的分析国内至今未见报道。本… 相似文献
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高效液相色谱-蒸发光散射法测定甘油磷脂酰胆碱 总被引:1,自引:0,他引:1
建立了高效液相色谱-蒸发光散射法(HPLC-ELSD)测定甘油磷脂酰胆碱(L-α-GPC)的方法。得到最佳色谱条件:色谱柱为Tigerkin Diol柱(250×4.6mm,5μm),流动相为甲醇-水(体积比90∶10),氮气流量为1.50L/min,漂移管温度为65℃。用外标法对L-α-GPC和磷脂酰胆碱(PC)进行定量分析,线性范围分别为0.25~3.00g/L和0.50~5.00g/L,相关系数分别为0.9993和0.9987;平均回收率分别为95.87%和95.72%;相对标准偏差分别为1.75%和1.93%。该方法能够简便快速的将L-α-GPC与其他磷脂进行分离。 相似文献
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建立了高效液相色谱法测定大豆磷脂类保健品中磷脂酰胆碱含量的方法。样品经丙酮溶解去除油脂类杂质干扰后,离心弃去上层液体,残液用氮气吹干,然后用正己烷-异丙醇(1+1)混合液溶解残渣,以正相硅胶柱(250mm×4.6mm,5μm)为固定相,以乙腈-甲醇-磷酸(80+20+0.6)溶液等度洗脱分离,用紫外检测器于波长205nm处检测。磷脂酰胆碱的质量浓度在2.136g·L-1以内与其峰面积呈线性关系。应用此法分析大豆磷脂软胶囊,平均回收率在90.2%~96.1%之间;测定值的相对标准偏差(n=6)在1.2%~3.6%之间。 相似文献
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8, 8-Dimethyl-5, 6, 7,8-tetrahydrophenanthrene-3, 4-dione (3) and 8, 8-dimethyl-2- ( 1-hydroxy ethyl) -5,6, 7, 8-tetrahydrophenanthrene-3,4-dione (4), two analogues of the antitumor active tanshinone, were synthesized from anisole. The synthesized compounds 3 and 4 were shown to be highly active against leukemia P-388 cell fine as assayed by in vitro MTT method. 相似文献
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弥拜霉素类似物的合成、表征和杀虫活性研究 总被引:1,自引:0,他引:1
以弥拜霉素类似物依维菌素为原料,根据类同合成法和亚结构连接法原理,对依维菌素进行脱糖,再与相应的酰氯进行酯化、肟化反应制得两个系列弥拜霉素类似物化合物4Ia~5IId,所有目标化合物都通过核磁共振氢谱、高分辨质谱的确认,并分别对朱砂叶螨(Tetranychus cinnabarinus)、南方粘虫(Mythimna sepatara)和蚕豆蚜(Aphis fabae)进行室内杀虫活性测定,结果表明所有衍生物均表现出不同程度的杀虫活性,其中化合物4IIa和4IIb对粘虫和蚜虫表现出很高的杀虫活性. 相似文献
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Aspernigerin类似物的合成及生物活性研究 总被引:1,自引:0,他引:1
以天然产物Aspernigerin为先导,将Aspernigerin结构中的一个1,2,3,4-四氢喹啉基团以芳胺类化合物替代,设计合成了15个未见文献报道的Aspernigerin类似物,结构均经过1H NMR,IR和元素分析确证.初步生物活性测试表明,大部分目标化合物均表现出了一定的杀虫和杀菌活性,其中化合物2n在200μg/mL的浓度下对小菜蛾仍表现出100%的杀虫活性,优于先导Aspernigerin和对照药剂噻虫嗪;化合物2d,2e,2j,2k表现出对黄瓜灰霉病优于先导Aspernigerin的抑制活性. 相似文献
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采用微波法,取代苯甲醛分别与环戊酮和环己酮经克莱森-斯密特缩合反应制得中间体2,6-双苯亚甲基环己酮(2a~2e)和2,5-双苯亚甲基环戊酮(5a);2a~2e或5a分别与硫脲或尿素经Biginelli反应合成了8个新型的姜黄素类似物(3a~3e,4a,4c和6a),其结构经1H NMR,13C NMR,IR和MS表征。利用DPPH法比较3~6与姜黄素的抗氧化能力。实验结果表明:3~6的抗氧化能力均比姜黄素母核结构高;3比4和6的自由基清除能力强;随用药量增大,抗氧化能力呈现先增强后下降的趋势,并在0.09 mg·mL-1~0.12 mg·mL-1自由基清除率达最大。 相似文献
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Schizandrin,isolatedfromSchisandrachinensisBaill,isadibenzocyclooctadienetypelignanwithvariousbiologicalactivitiesl.Niuandco-workershavestudiedthepharmacologicaleffectsofthiscompound'onthecentralnervoussystem.Theresults2showthatschizandrinpossessesextensive,significantanti-convulsiveactivities,particularlyregardingcerebraIprotectionandadjustmentofthecerebralcortexexcitementinhibitionprocess.Therefore,researchonthechemicalsynthesisofschzandrinanditsanaloguesisveryimportant.InourattCmPtCdtota… 相似文献
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Hideo Takakura Kiyoshi Sasakura Tasuku Ueno Dr. Yasuteru Urano Prof. Dr. Takuya Terai Kenjiro Hanaoka Dr. Takashi Tsuboi Dr. Tetsuo Nagano Prof. Dr. 《化学:亚洲杂志》2010,5(9):2053-2061
We systematically synthesized bioluminogenic substrates bearing an amino group on benzothiazole, quinoline, naphthalene, and coumarin scaffolds. They emit bioluminescence in various colors: red, orange, yellow, and green. An amino‐substituted coumarylluciferin derivative, coumarylaminoluciferin (CAL), showed the shortest bioluminescence wavelength among substrates reported so far. Further, the fluorescence of CAL did not exhibit solvatochromism, which suggests that its bioluminescence is not susceptible to environmental factors. We applied CAL as an energy‐donor substrate for a bioluminescence resonance energy transfer (BRET) system with click beetle red luciferase (CBRluc), a mutant of firefly luciferase, as the energy‐donor enzyme and yellow fluorescent protein (YFP) as the energy‐acceptor fluorophore, and obtained a clearly bimodal bioluminescence spectrum. Stable bioluminescence that is not influenced by environmental factors is highly desirable for reliable measurements in biological assays. 相似文献
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Asymmetric curcumin analogues as potential anticancer compounds. The purpose of this study was to synthesize product 5-benzo[1,3]dioxol-5-yl-1-phenyl-penta-2,4-dien-1-one uses the method conventional and microwaves. Product 5-benzo[1,3]dioxol-5-yl-1-phenyl-penta-2,4-dien-1-one can be synthesized from the cullilawan oils with several stages, among others; isolation safrole, isomerization, oxidation and condensation reactions. Isolation of safrole from cullilawanoils performed using NaOH solution and purified using distillation fractionation pressure reduction produces 19.30% safrole are tested for purity by GCMS and for the identification of the structure is done by using FTIR and 1H-NMR. The safrole isomerization performed using KOH without solvent at a temperature of 120oC for 8 hours resulted isosafrole (91.53%) which consists of cis-isosafrol and trans-isosafrol. Oxidation isosafrole performed using KMnO4 in acidic conditions using a phase transfer catalyst tween 80 at a temperature of < 30oC and separation by silica gel resulted in 65.63% piperonal were tested with the GCMS and identification using FTIR and 1H-NMR. Products asymmetrical curcumin analogous made in the condition alkaline by conventional methods for three hours produce 99.55%, a method of microwaves in 140 watts for two minutes produce 82.82%. 相似文献
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Sophie Danappe Fabien Boeda Christian Alexandre Anne‐Marie Aubertin Nathalie Bourgougnon 《合成通讯》2013,43(21):3225-3239
Synthesis of eight nucleoside analogues 4–11 with a methylenecyclobutane unit is described. Wittig reaction with 2‐hydroxymethylcyclobutanone 12 gave a mixture of Z (13) and E (14) derivatives, which was separated before functional modifications. The heterocyclic moieties were introduced via a Mitsunobu reaction either on the saturated chain or on the unsaturated chain. When adenine was used in this reaction, only the N‐9 substitution products were obtained. Removal of the protecting groups provided the target products. 相似文献
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γ-氨基丁酸(GABA)类似物有着强烈而有趣的生理活性,有些已应用于中枢神经系统疾病的临床治疗。综述了近二十几年以来γ-氨基酸类似物的不同合成方法。 相似文献