共查询到20条相似文献，搜索用时 62 毫秒
1.
目的：对浙江、湖南、安徽3个产地共9批白术药材进行质量对比研究、指纹图谱对比分析，为不同产地白术鉴别及质量评价提供参考。方法：按照《中华人民共和国药典》的要求对白术药材进行质量检验，比较3个不同产地白术药材质量差异；采用反相高效液相色谱法，测定白术指纹图谱，进行相似度分析及主成分分析。结果：3个产地的白术药材均符合标准要求；对9批白术药材的指纹图谱进行分析，选择稳定性好、吸收强、特征明显的色谱峰作为共有峰，结果共标定了7个共有指纹峰，9批样品之间的共有峰相似度＞0.96。结论：浙江、湖南、安徽3个产地的白术药材均符合质量标准要求，指纹图谱也没有差异，证明3个产地的白术药材没有明显质量差异，无法鉴别区分。 相似文献
2.
目的：对不同产地松叶药材的质量进行评价，建立松叶药材的指纹图谱，完善松叶药材的质量评价系统，为其资源的开发利用提供科学依据。方法：收集15批不同产地的松叶药材，采用薄层色谱法进行定性鉴别；采用高效液相色谱法进行定量鉴别，并对水分、水溶性浸出物进行测定；同时建立松叶的高效液相色谱指纹图谱。结果：薄层色谱法斑点清晰，分离度好；采用HPLC法对松叶进行含量测定，经方法学考察验证，槲皮素与山奈素分别在35.34～176.7ng和71.74～358.7ng范围内呈良好的线性关系，平均加样率分别为96.2%、97.16%（RSD分别为1.81%、1.66%，n=6），说明该方法灵敏可行，重现性好；建立了松叶的指纹图谱，并对15批松叶样品的指纹图谱进行了相似度评价。结论：本研究建立的方法可行、简便，可为松叶质量标准的建立提供参考依据。 相似文献
3.
目的：建立黄芪药材高效液相色谱指纹图谱分析方法。方法：采用高效液相色谱法,色谱柱：Agilent ZORBAX SB-C18（4.6 mm×250 mm,5 μm）,流动相A：乙腈-甲醇（90∶10）,流动相B：0.2%甲酸溶液,梯度洗脱,流速：0.7 ml/min,柱温：30℃;进样量：10 μl;检测波长：254 nm。结果：通过方法学考察及17批样品的测定,建立了黄芪药材的HPLC指纹图谱,确定了10个共有峰,3个产地17批黄芪药材特征峰的相似度在0.92以上,各产地黄芪药材有一定的差异性。主成分分析中前3个主成分累计贡献率为92.0%,说明这3个主成分包含了被分析样本的绝大部分信息。聚类分析按产地将17批黄芪药材聚为3类。结论：本文所建立的方法准确、可靠,可用于评价和控制不同产地黄芪药材的质量。 相似文献
4.
首次采用RP-HPLC方法建立了柽柳的参考指纹图谱。所建立的指纹图谱精密度、重现性、稳定性良好,RSD值5%。指纹图谱中共标示出29个共有峰,划分为5个特征谱带Ⅰ～Ⅴ。在指纹图谱的应用中,运用建立的指纹图谱共有峰相对保留时间参数,对商品柽柳药材进行了鉴别分析,证明所建立的参考指纹图谱可用于药材柽柳的真伪鉴别。 相似文献
5.
目的：建立泻白散基准样品特征图谱方法,以LC-MS/MS指认各特征峰并对其进行归属,建立基准样品各组成药味质控指标的含量测定方法综合评价其质量。方法：以色谱柱Hypersil ODS2(250 mm×4.6 mm,5μm)、乙腈-0.1%磷酸/甲酸梯度洗脱、检测波长280nm、流速1.0 ml/min、柱温25℃、进样量10μl进行指纹图谱研究,以同一色谱条件使用LC-MS/MS联用进行峰归属并进行化学成分分析,以指认的各药味专属性峰建立基准样品质控指标含量测定方法。结果：泻白散基准样品特征图谱重复性良好,供试品溶液48 h内稳定,多批次检测显示泻白散指纹图谱共有峰14个,相似度均＞0.9;峰归属确认其中5个归属于炒桑白皮,5个归属于炙甘草,3个归属于地骨皮;并通过LC-MS/MS指认出其中11个色谱峰;选取桑皮苷A、甘草酸、枸杞素B分别建立含量测定方法,结果显示方法均具有专属性,重复性良好,加样回收率分别为94.9%、93.5%、95.2%。结论：该指纹图谱方法经验证可行,可有效鉴别泻白散三味饮片;结合LC-MS/MS成分分析可有效选取基准样品各药味的质控成分;建立的检测桑皮苷A、甘草酸、枸杞素B含量测定方法经方法学考察确认可行。 相似文献
6.
目的：对复创产品指纹图谱进行研究，比较分析不同工艺制备的复创产品中苷类成分指纹图谱的差异。方法：采用HPLC法，以人参皂苷Rg1为参照物，C18色谱柱，乙腈-水为流动相梯度洗脱，流速1.00mL/min，柱温25℃，检测波长203nm，进样10μL，记录时间75min，以人参皂苷Rg1色谱峰（S峰）的保留时间和峰面积为1计算各峰相对保留时间和相对峰面积比值，并进行方法学考查；采用中国国家药典委员会制定的“中药色谱指纹图谱相似性评价系统”进行相似度评价。结果：制定了不同工艺制备的复创产品中苷类成分指纹图谱，标注了复创产品中苷类成分8个共有指纹峰。不同工艺制备的复创产品各共有指纹峰的相对保留时间比较接近，而各共有指纹峰的相对峰面积则相差较大。结论：通过对复创产品中苷类成分指纹图谱的制定和比较分析，为指纹图谱的制定提供了实验依据，对提高天然产物质量控制技术进行了有意义的探索。 相似文献
7.
目的：建立湖南时代阳光药业股份有限公司小儿扶脾颗粒的高效液相色谱法（HPLC）指纹图谱分析方法。方法：采用反相高效液相色谱法，Ulimate-XB C18色谱柱（4.6mm×250mm，5μm），乙腈-0.1%磷酸溶液梯度洗脱，柱温30℃，检测波长330nm。结果：以橙皮苷为参照峰，建立了小儿扶脾颗粒HPLC指纹图谱，确立了12个共有峰，10批样品之间的共有峰相似度>0.9。结论：该方法准确，精密度、重复性较好，可作为湖南时代阳光药业股份有限公司小儿扶脾颗粒质量控制的依据。 相似文献
8.
海洋药用生物系列HPLC化学指纹图谱研究 Ⅱ.三斑海马HPLC化学指纹图谱研究 总被引：1，自引：0，他引：1
采用高效液相色谱(HPLC)法建立三斑海马的参考指纹图谱.运用DAD-Agilent 1100高效液相色谱仪,色谱条件:Agilent Zorbax XDB C18色谱柱(4.6 mm×250 mm;5.0 μm),乙腈-0.1%磷酸水流动相梯度洗脱,流速1.0 mL·min-1,检测波长200 nm,参比波长360 nm,柱温30 ℃.结果显示建立的指纹图谱包含11个共有峰,方法的精密度、重现性和稳定性试验RSD值均小于5.0%.研究表明所建立的三斑海马的参考指纹图谱可用于药材的真伪鉴别. 相似文献
9.
探讨中药指纹图谱相关性研究方法,运用Agilent 1100 DAD-HPLC高效液相色谱仪,采用色谱条件:大连依利特SinoChrom ODS-BP(250 mm×4.6 mm,5um)色谱柱,甲醇-0.1%磷酸水梯度洗脱,柱温30℃,流速1.0 mL·min-1检测波长280mm,进样量20uL.建立了的相同条件下丹红注射剂、中间体和药材的HPLC指纹图谱.所建立的指纹图谱个峰分离度较好,指纹信息完整,符合指纹图谱技术规范.进一步利用相似度分析软件进行了指纹图谱相关性分析,揭示了丹红注射剂与中间体和药材具有较好的相关性.共有峰的相对保留时间及相对峰面积参数,可作为中药注射剂质量控制的重要依据. 相似文献
10.
目的：研究60Co-γ辐照灭菌对三七药材质量的影响。方法：采用3个不同60Co-γ辐照剂量（4 kGy、6 kGy、8 kGy）对三七药材进行灭菌处理，通过检测辐照前后三七中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1含量，辐照前后三七指纹图谱比较、薄层鉴别等，考察不同剂量60Co-γ辐照灭菌对三七药材质量的影响。结果：不同剂量60Co-γ辐照灭菌对三七药材外观、含量、指纹图谱、薄层鉴别影响的差异均无统计学意义。结论：初步表明三七药材灭菌方式可选择60Co-γ辐照进行灭菌。 相似文献
11.
The analysis of the structure of the cryolithozone, facies, and thicknesses of the Quaternary sediments and the results of the physicochemical mathematical modeling of the modern shelf of the western part of the Laptev Sea support the influence of the Late Pleistocene glaciations on the heat conditions and the distribution of the permafrost in the area. A ～200-m thick glacier formed under aerial conditions from atmospheric precipitation represented the metamorphosed snow cover. According to the modeling, the long-living (from 60?50 to 10?4 ky) glacier reduced the thickness of the permafrost rocks in the reviewed shelf area for 280–360 m. The Holocene marine transgression additionally decreased the thickness from 50–140 m on the inner shelf to 220–350 m on the outer shelf. The modern submarine cryolithozone 450-0 m thick is wide-spread in the studied region from the coast to the shelf boundary (isobaths of 130–140 m), where it pinches out at a distance of ～380 km from the coast at a depth of ～250 m above the sea level. 相似文献
12.
We analyze the components of the carbon system of the Sevastopol bay waters and the balance of main sediment-forming substances
using the data of field investigations in 1998–2008. The interannual variations of total inorganic carbon and the equilibrium
partial pressure of carbon dioxide in the bay water are noted. An increase in the flux of carbon dioxide into the bay and
in the content of organic carbon in bottom sediments is revealed, and an explanation of this phenomenon is given. The priority
accumulation of organic carbon in the sediments of the bay is established. We assess the interannual variation in the relative
abundances of organic and inorganic carbon as an index of the carbon cycle stability. 相似文献
13.
We generalize and analyze the state of investigations of the influence of river waters on the hydrologic structure of the
Black Sea. Specific features of the water, regime and hydrography of rivers flowing into the sea, data on the discharge of
rivers, and intrayear and interyear variability of the discharge are presented. We discuss and analyze works studying the
transformation of river waters, routes of desalinized sea waters, and their influence on the thermohaline structure and dynamic
regime of the sea.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
14.
V. A. Ivanov S. P. Lyubartseva N. Mikhailova N. B. Shapiro 《Physical Oceanography》2001,11(6):509-524
We analyze the results of numerical calculations performed according to the three-dimensional interdisciplinary model of an
ecological system of the Black-Sea shelf zone near the estuary of the Danube. The complete system of equations of hydrothermodynamics
is solved together with transport equations of the advection-diffusion-reaction type used to describe the transformation of
a substance (nitrogen) between the components of the characteristic vectors of the ecosystem: plankton, detritus, and biogenic
elements (nitrates). We describe the distinctive features of the circumcontinental distribution of components obtained as
a result of numerical experiments and present arguments for the conclusion that the ecosystem of the Danube estuary water
area plays the role of a buffer zone between the press of the Danubian biogenic pollutions and the neighbouring areas of the
shelf zone and open sea.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
15.
Ten years of semistationary studies of the interaction of the ice cover and the coastal relief of the Kandalakhsa Gulf in the White Sea allowed us to reveal the peculiarities of these processes in the warm and cold years and the mechanisms of the origination of ice forms, including ice tents, which govern the character of the tidal flats. Three dynamic fast ice zones are distinguished by their geomorphological location, morphology, and ice dynamics. The dependence of the mechanisms and volumes of the enrichment of the fast ice in the sediments on the coastal zone??s relief was established. At the coast of the Kindo Peninsula (Velikaya Salma Strait), the ice mostly contains fine-sandy sediments. Coarser sediments, including boulders, are occasional and frozen into the ice at the contact of the fast ice and the bottom. At the expense of the ice??s spreading by 4?C6 times in the warm years and 2?C4 times in the cold years, several thousand tons of sediments mostly from the tidal flat??s surface (100?C700 m3 from 1 km of coast in the wide tidal flats and <50 m3 on the steep coasts) are delivered to the water area. 相似文献
16.
Relationship between the path of the Kuroshio in the south of Japan and the path of the Kuroshio Extension in the east 总被引：2，自引：0，他引：2
A relationship between paths of the Kuroshio and Kuroshio Extension (KE) is investigated, using the satellite-derived altimetry
dataset of 1993–2008. When the Kuroshio takes the nearshore nonlarge meander path or typical large meander path and resultantly
goes through the deeper channel (about 2500 m) of the Izu-Ogasawara Ridge, the KE path adopts a relatively stable state with
the two quasi-stationary meanders. On the other hand, when the Kuroshio takes the offshore nonlarge meander path and then
passes over the shallower part of the Ridge (about 1000 m), the KE path tends to be convoluted, i.e., an unstable state. 相似文献
17.
I. E. Timchenko A. A. Primalenny V. D. Yarin E. F. Vasechkina E. M. Igumnova 《Physical Oceanography》2001,11(4):367-378
We use many-year archival observations of hydrologic and hydrobiologic state of the Sea of Azov for the identification of
the structure of a model of its ecosystem. The ecosystem model, supplemented with expert estimates of bioresource consumption
(fish reserve), contamination level, and possible ecologic fines for violation of the sea natural state, is formalized by
the method of system dynamics. Hereat, the major part of influence functions is found in terms of observational data with
application of self-organization algorithms. We also present the results of simulated experiments with the model of the ecosystem,
which enable us to analyse scenarios of its behaviour under the influence of various external factors (wind, river discharge,
water exchange with the Black Sea, etc.).
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
18.
The methodology and the first results of the computations of the volumes, masses, and growth rates of the sedimentary body of the buried Black Sea basin are presented. Their temporal evolution reflects the regional paleogeodynamics, in particular, the reorientation of the vector of the relative movement of the Arabian and Eurasian lithospheric plates and the related intensification of their collision in the late Miocene-Pliocene. 相似文献
19.
E. L. Vinogradova 《Oceanology》2008,48(4):483-492
The spatiotemporal variability of the hydrochemical composition of the riverine runoff in nearmouth areas is presented using the example of selected rivers of the Arctic Basin. The temporal dynamics of the riverine nutrient runoff are mainly determined by the seasonal and interseasonal variations in the drainage basins. The spatial variations in the chemical composition of riverine waters in the near-mouth areas are mainly caused by the dynamics of the water flow and the river bed relief and, to a lesser degree, by biochemical processes. It is shown that the variations in the nutrient composition of the waters in near-mouth areas are comparable in magnitude to those at the river-sea geochemical barriers. 相似文献
20.
Izvestiya, Atmospheric and Oceanic Physics - Analysis of the temporal variations of the virtual heights of the sporadic E layer (h?ES) determined from ionograms with increased accuracy (1... 相似文献