Quality Evaluation of Rhodiola crenulata: Quantitative and Qualitative Analysis of Ten Main Components by HPLC

2008 ◽  
Vol 31 (9) ◽  
pp. 1324-1336 ◽  
Author(s):  
Hao Huang ◽  
Mingjin Liang ◽  
Peng Jiang ◽  
Yongli Li ◽  
Weidong Zhang ◽  
...  
Keyword(s):  
Qualitative Analysis ◽  
Quality Evaluation ◽  
Rhodiola Crenulata ◽  
Main Components

scholarly journals Quality Evaluation of Fritillaria thunbergii by High-Performance Liquid Chromatography Fingerprinting Coupled with Multicomponent Quantitative Analysis

2021 ◽  
Vol 25 (01) ◽  
pp. 131-138
Author(s):  
Ruoxu He
Keyword(s):  
Quantitative Analysis ◽  
High Performance ◽  
Quality Evaluation ◽  
Light Scattering Detection ◽  
Mobile Phases ◽  
Evaporative Light Scattering ◽  
Significant Difference ◽  
The Family ◽  
Main Production ◽  
Main Components

Medicinal Zhebeimu refers to the dried bulb of the plant Fritillaria thunbergii, which belongs to the family Liliaceae. Their main production sites are in Zhejiang, Jiangsu, and Anhui Provinces, with alkaloids as the main components. In this study, according to Chinese Pharmacopoeia, different mobile phases were investigated. Because most alkaloids in Fritillaria do not have UV absorption, evaporative light scattering detection (ELSD) was used instead of UV to produce the HPLC-ELSD spectra for five F. thunbergii samples and other samples, e.g. F. chuanxiensis, F. anhuiensis, and F. ussuriensis. Comparison showed significant differences exist among these species. There was no significant difference between the F. thunbergii samples produced in Zhejiang, which clustered together in both the cluster analyses. However, the F. thunbergii samples produced in Nantong, Jiangsu and the F. thunbergii samples produced in Zhejiang were separated in the clustering chart, which may be caused by different cultivation environments. The obtained results showed that the combination of quantitative analysis and chromatographic fingerprint analysis can be readily utilized for quality control purposes, offering a comprehensive strategy for quality evaluation of F. thunbergii and related products. © 2021 Friends Science Publishers

scholarly journals Microscopic Characteristic and Chemical Composition Analysis of Three Medicinal Plants and Surface Frosts

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4548 ◽  
Author(s):  
Da Qing Yu ◽  
Xiao Jing Han ◽  
Ting Yu Shan ◽  
Rui Xu ◽  
Jin Hu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Medicinal Plants ◽  
Quality Evaluation ◽  
Chemical Constituents ◽  
Gas Chromatography Mass Spectrometry ◽  
Composition Analysis ◽  
Chemical Composition Analysis ◽  
Main Components ◽  
Main Component ◽  
Tof Ms

The accumulation of chemical constituents of some medicinal plants, such as Paeonia ostii T. Hong et J. X. Zhang, Houpoëa officinalis (Rehder and E. H. Wilson) N. H. Xia and C. Y. Wu. and Atractylodes lancea (Thunb.) DC, can precipitate on the surface and form frosts after natural or artificial intervention. The characteristics of these three medicinal plants and their frosts were analyzed by light microscope, polarizing microscope, stereomicroscope, and metalloscope. The results of ordinary Raman of P. ostii and H. officinalis showed that the frosts of P. ostii matched paeonol, while that of H. officinalis matched magnolol and honokiol. In P. ostii and its frost, 19 peaks were identified by UPLC-Q/TOF-MS, and the main component was paeonol. Eleven components were identified in H. officinalis and its frosts, and the main components were magnolol and honokiol. A. lancea and its frosts were analyzed by gas chromatography-mass spectrometry (GC-MS), 21 were identified, and its main components were hinesol and β-eudesmol. These three medicinal plants accumulate compounds and precipitate frosts on the surface. The results show that the components of the frosts provide a basis for quality evaluation and research on similar medicinal plants, and reveals the scientific connotation of “taking the medicinal materials’ precipitated frosts as the best” of P. ostii, H. officinalis, and A. lancea, to some extent.

Qualitative Analysis of Ethanolic extract of Ginger (Zingiber officinale Rosc) by Gas Chromatography Triple Quad Time-Flight (GC-Q-TOF) Technology

2021 ◽  
pp. 4307-4313
Author(s):  
K.A.A Mohammed ◽  
A.A.F Wasfy ◽  
M. S Bazalou
Keyword(s):  
Gas Chromatography ◽  
Biological Activity ◽  
Qualitative Analysis ◽  
Bioactive Compounds ◽  
Biological Activities ◽  
Ethanolic Extract ◽  
Zingiber Officinale ◽  
Chemical Constituent ◽  
Main Components ◽  
Minor Compounds

This study was carried out to identify of the chemical constituent of ginger (Zingiber officinale Rosc), forty-eight compounds of ethanolic sonicated extract were identified by Gas Chromatography Triple Quad Time-Flight (GC-Q-TOF) analysis. Nineteen of these compounds existed studies on their biological activity, The main components were Zingiberone (4.12%) ,[10]-Shogaol(2.47%),Methyldiacetoxy-[6]gingerdiol(4.30%),[6]-Gingerdiol3,5 diacetate(7.77%), [6]-Gingerdiol (2E)-geranial acetal (2.76%), Campesterol (1.52%), Stigmasterol(1.71%),γ-Sitosterol(4.46%),10S,11S-Himachala-3(12),4 diene(3.57%), Cubebol(2.01%), 3α,9β-Dihydroxy-3,5α,8 trimethyltricyclo[6.3.1.0(1,5)]dodecane(2.24%),8-Amino-2,6 dimethoxylepidine(2.13%),17α-Ethynyl-17β-hydroxy-5β-estran-3-one(2.50%), Tributyl aconitate(2.34%), Ethyl 3,4-dimethoxy-N-(3-phthalimidopropionyl)-dl phenylalaninate (3.90%), Podocarpa-1,8,11,13-tetraen-3-one, 14-isopropyl-1,13-dimethoxy (12.51%), 2,4-Diamino-5,6-decamrthylenethieno[2,3-d]pyrimidine(3.65%) and trans-1-(p-(Methylthio)phenyl)-1-dodecen-3-one(6.68%). also minor compounds were present. From this result, it could be concluded that ginger (Zingiber officinale Rosc) contains various bioactive compounds which have various biological activities. Therefore, it is recommended as a plant of therapeutic importance.

New Method for Determination of Trans-resveratrol for Quality Evaluation of Red Wines by Multivariate Calibration Associated with UVVIS spectroscopy

2020 ◽  
Vol 17 ◽  
Author(s):  
Milleno D. Mota ◽  
Marilena Meira ◽  
Juceni P. David ◽  
Erika M. de O. Ribeiro ◽  
Hugo N. Brandão ◽  
...  
Keyword(s):  
Quality Evaluation ◽  
Multivariate Calibration ◽  
Low Cost ◽  
Principal Component ◽  
Red Wines ◽  
Grape Variety ◽  
Predictive Capacity ◽  
Production Region ◽  
Main Components

Background: This work describes a fast, simple, sensitive, and low-cost method for the identification of resveratrol in different brands and varieties of red wines. Methods: It was developed based on a comparison of the UV-VIS spectra of the samples and samples enriched with different concentrations of the trans-resveratrol standard. The spectra were analyzed by chemometric principal component analysis (PCA) and multivariate calibration. Results: The PCA data indicated that only 4 main components made possible group samples based on the grape variety characteristics and/or production region. Conclusion: From the construction of partial least squares (PLS) and multiple linear regression (RLM) models, it was possible to predict the sample trans-resveratrol content with that sample showing similarities between the groups observed in the PCA and the samples used in the model constructions. The predicted trans-resveratrol present in these samples ranged from 0.29 to 23.3 mg L-1. This multivariate method suggested a good predictive capacity of determination of resveratrol concentrations in commercial red wines.

Qualitative Analysis and Quality Evaluation of Cnidium monnieri Using UHPLC-ESI-Q-TOF/MS

2016 ◽  
Vol 8 (4) ◽  
pp. 323-330 ◽  
Author(s):  
Min Jia ◽  
Yi-min Li ◽  
Xin Zhai ◽  
Yang Yang ◽  
Chun-yan Li ◽  
...  
Keyword(s):  
Qualitative Analysis ◽  
Quality Evaluation ◽  
Tof Ms

Structural analysis of the photosynthetic membrane from Ectothiorhodospira halochloris

1983 ◽  
Vol 41 ◽  
pp. 740-741
Author(s):  
H. Engelhardt ◽  
R. Guckenberger ◽  
W. Baumeister
Keyword(s):  
Lattice Structure ◽  
Bacterial Species ◽  
Hexagonal Lattice ◽  
Reaction Centre ◽  
Photosynthetic Membrane ◽  
Rhodopseudomonas Viridis ◽  
Photosynthetic Membranes ◽  
Ectothiorhodospira Halochloris ◽  
Main Components

Bacterial photosynthetic membranes contain, apart from lipids and electron transport components, reaction centre (RC) and light harvesting (LH) polypeptides as the main components. The RC-LH complexes in Rhodopseudomonas viridis membranes are known since quite seme time to form a hexagonal lattice structure in vivo; hence this membrane attracted the particular attention of electron microscopists. Contrary to previous claims in the literature we found, however, that 2-D periodically organized photosynthetic membranes are not a unique feature of Rhodopseudomonas viridis. At least five bacterial species, all bacteriophyll b - containing, possess membranes with the RC-LH complexes regularly arrayed. All these membranes appear to have a similar lattice structure and fine-morphology. The lattice spacings of the Ectothiorhodospira haloohloris, Ectothiorhodospira abdelmalekii and Rhodopseudomonas viridis membranes are close to 13 nm, those of Thiocapsa pfennigii and Rhodopseudomonas sulfoviridis are slightly smaller (∼12.5 nm).

Electron Microscopy of Human Gallstones

1971 ◽  
Vol 29 ◽  
pp. 296-297
Author(s):  
C. Wolpers ◽  
R. Blaschke
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Bile Pigment ◽  
X Ray Diffraction ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Follow Up Study ◽  
Infra Red ◽  
Main Components

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.

A controller for safe, convenient operation of LaB6 emitters on electron-beam instruments

1983 ◽  
Vol 41 ◽  
pp. 408-409
Author(s):  
W. J. Abramson ◽  
H. W. Estry ◽  
L. F. Allard
Keyword(s):  
Electron Beam ◽  
Control System ◽  
Thermal Shock ◽  
Appropriate Care ◽  
Electron Guns ◽  
Tungsten Filaments ◽  
Order Of Magnitude ◽  
Main Components

LaB6 emitters are becoming increasingly popular as direct replacements for tungsten filaments in the electron guns of modern electron-beam instruments. These emitters offer order of magnitude increases in beam brightness, and, with appropriate care in operation, a corresponding increase in source lifetime. They are, however, an order of magnitude more expensive, and may be easily damaged (by improper vacuum conditions and thermal shock) during saturation/desaturation operations. These operations typically require several minutes of an operator's attention, which becomes tedious and subject to error, particularly since the emitter must be cooled during sample exchanges to minimize damage from random vacuum excursions. We have designed a control system for LaBg emitters which relieves the operator of the necessity for manually controlling the emitter power, minimizes the danger of accidental improper operation, and makes the use of these emitters routine on multi-user instruments.Figure 1 is a block schematic of the main components of the control system, and Figure 2 shows the control box.

Visualization of Internal Skin Structures with the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 46-47
Author(s):  
Emil Bernstein
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Great Depth ◽  
Hair Follicles ◽  
Depth Of Field ◽  
Pig Skin ◽  
Realistic Picture ◽  
Main Components ◽  
Scanning Electron

An interesting method for examining structures in g. pig skin has been developed. By modifying an existing technique for splitting skin into its two main components—epidermis and dermis—we can in effect create new surfaces which can be examined with the scanning electron microscope (SEM). Although this method is not offered as a complete substitute for sectioning, it provides the investigator with a means for examining certain structures such as hair follicles and glands intact. The great depth of field of the SEM complements the technique so that a very “realistic” picture of the organ is obtained.

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