广西产拳卷地钱HPLC指纹图谱研究

为了对广西产拳卷地钱药材进行质量控制,采用HPLC指纹图谱法对8批药材进行了研究,色谱条件为安捷伦ZORBAX SB-C18色谱柱(4.6 mm×250 mm,5μm),流动相为乙腈(B)-0.1%磷酸水溶液(D),梯度洗脱,检测波长为230 nm,柱温为25℃。结果表明:建立了参考指纹图谱,共有峰6个,8批广西产拳卷地钱药材HLPC指纹图谱相似度均大于0.75,其精密度、重复性、稳定性实验均符合指纹图谱技术要求。HPLC指纹图谱分析,数据稳定可靠,方法简便高效,可为广西产拳卷地钱质量评价提供参考。     

鹅不食草液相色谱指纹图谱及化学成分表征

目的:建立鹅不食草的HPLC指纹图谱,并对其化学成分进行表征。方法:指纹图谱采用Alltima~(TM)C_(18)色谱柱(250 mm×4.6 mm,5μm),柱温为35℃,流动相为乙腈-0.2%磷酸溶液,梯度洗脱;流速为1.0 m L/min;检测波长为290 nm,进样量为20μL。成分表征采用UPLC-QTOF-MS分析,Waters ACQUITY HSS T3(2.1 mm×100 mm,1.8μm)色谱柱,0.1%甲酸乙腈(A)-0.1%甲酸水(B)梯度洗脱,ESI离子源,正离子与负离子模式下采集数据。结果:通过12批鹅不食草的HPLC指纹图谱分析,确定了13个特征峰,12批样品的相似度在0.837~0.997之间;UPLC-QTOF-MS鉴别出26个化学成分,其中Dulcoside A、Kaurane pentanedioic acid derivative及3’,4’-didesulphatedcarboxyatractyloside等二萜苷类化合物系首次在鹅不食草药材中发现。结论:本研究建立的HPLC指纹图谱和化学成分表征信息具有"全息"特征,可为鹅不食草药材整体质量评价提供科学依据。     

猫须草HPLC指纹图谱研究

为建立猫须草药材HPLC指纹图谱分析方法,采用高效液相色谱法,以Phenomenex Synergi 4u hydro-RP 250×4.60 mm为色谱柱,以甲醇-0.1%甲酸溶液为流动相梯度洗脱,检测波长254 nm,流速1.0 mL·min^-1,柱温40 ℃。结果表明,建立的猫须草药材HPLC指纹图谱,确定了15个共有峰,各猫须草样品指纹图谱与对照指纹图谱的相似度均在0.9以上。该方法简单、准确、重复性好,为更好地控制猫须草药材质量提供有效可靠的方法。     

维吾尔药材地锦草HPLC指纹图谱的研究

目的:建立地锦草高效液相色谱指纹图谱。方法:Shim-pack ODS C18(150 mm×4.6 mm.i.d.,5.0μm)为色谱柱,甲醇-0.1%磷酸水系统为流动相(梯度洗脱),检测波长为272 nm,柱温为30℃。结果:测定了产于新疆的10批地锦草的指纹图谱,标定了13个共有指纹峰,方法学考察结果符合指纹图谱技术要求。经计算机模拟相似度计算软件计算,相似度大于0.9。结论:建立的HPLC指纹图谱分析方法可作为地锦草的鉴别方法之一,为地锦草的质量控制提供了依据。     

新疆雪莲的高效液相指纹图谱及液-质联用分析

建立新疆雪莲药材的高效液相指纹图谱。以Luna C18为分析柱,用乙腈-0.1%醋酸梯度洗脱,获得分离度较好的新疆雪莲药材HPLC分析条件。通过10批样品的分析和对照,标示出12个共有峰,相似度分析大于0.92。最后通过HPLC-UV-MS/MS联用分析鉴定出其中7个化学成分。该方法可为新疆雪莲药材指纹图谱和质量分析方法的建立提供参考。     

四川GAP基地虎杖药材HPLC指纹图谱研究

为了建立虎杖GAP基地药材HPLC指纹图谱,采用梯度洗脱法,对虎杖野生与种植药材进行了HPLC代测定。流动相为乙腈-0．1％磷酸水溶液线性梯度洗脱,检测波长为230nm;记录时间：70min;采用中南大学出版的指纹图谱相似度比较软件进行比较。通过软件的比较,虎杖野生与种植药材的指纹图谱相似度均大于0．90。说明运用梯度洗脱能很好分离虎杖的各类成分,本文所建立的方法可作为虎杖药材质量标准制定的参考依据。     

罗布麻叶配方颗粒与传统汤剂HPLC指纹图谱的相关性

建立了罗布麻叶传统汤剂的HPLC指纹图谱,并对其与配方颗粒的HPLC指纹图谱相关性进行了评价.采用Kromasil 100-5-C18,250 mm×4.6mm,5 μm的色谱柱,以2g/L H3PO4-乙腈溶液作为流动相进行梯度洗脱,检测波长为360 nm,柱温40℃,流速1.0 mL/min,进样体积10 μL.结...     

芦荟的HPLC指纹图谱建立、化学模式识别分析及其含量测定

采用Phenomenex C18色谱柱(250 mm×4.6 mm,5 μm),以甲醇-乙腈-0.3％磷酸水为流动相进行梯度洗脱,建立芦荟的指纹图谱.运用化学模式识别方法对不同产地芦荟药材质量控制方法进行评价.结果表明:12批芦荟HPLC指纹图谱共标定23个共有峰,并通过对照品指认其中6个成分;除了广西的3批药材之外,...     

药用菊三七的HPLC指纹图谱

目的:建立药用菊三七的HPLC指纹图谱,为中药材质量控制提供有效的方法。方法:CBL C18色谱柱(250 mm×4.6 mm,5μm),流动相为乙腈-水溶液梯度洗脱;检测波长212 nm;柱温25℃;流速1.0 mL.m in-1;分析时间90 m in。结论:成功建立起其指纹图谱,并认为该方法稳定可靠,可以对该植物将来作为药物制剂的原材料进行质量控制提供参考。     

银杏叶内酯成分的指纹图谱研究

以白果内酯为参照物,应用HPLC法建立银杏叶药材的内酯指纹图谱研究。采用：色谱柱：Kromasil C18（250mm～4．6mm,5μm）;流动相：甲醇-四氢呋喃-水梯度洗脱;检测器：蒸发光散射检测器;柱温：35℃;流速：O．8mL／min。本方法精密度和重复性试验均符合《中药注射剂指纹图谱研究的技术要求（暂行）》中要求,主要指纹峰9个。     

Investigation of the mechanism of temperature sensitivity of the electroreceptors of ampullae of lorenzini

In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980.     

Principles of organization and evolution of systems of regulation of functions

Evolution of living organisms is closely connected with evolution of structure of the system of regulations and its mechanisms. The functional ground of regulations is chemical signalization. As early as in unicellular organisms there is a set of signal mechanisms providing their life activity and orientation in space and time. Subsequent evolution of ways of chemical signalization followed the way of development of delivery pathways of chemical signal and development of mechanisms of its regulation. The mechanism of chemical regulation of the signal interaction is discussed by the example of the specialized system of transduction of signal from neuron to neuron, of effect of hormone on the epithelial cell and modulation of this effect. These mechanisms are considered as the most important ways of the fine and precise adaptation of chemical signalization underlying functioning of physiological systems and organs of the living organism