Profiling and isomer recognition of phenylethanoid glycosides from Magnolia officinalis based on diagnostic/holistic fragment ions analysis coupled with chemometrics

2020 ◽  
Vol 1611 ◽  
pp. 460583
Author(s):  
Zhenzhen Xue ◽  
Changjiangsheng Lai ◽  
Liping Kang ◽  
Akira Kotani ◽  
Hideki Hakamata ◽  
...  
Keyword(s):  
Phenylethanoid Glycosides ◽  
Fragment Ions ◽  
Magnolia Officinalis

scholarly journals Positional Isomerization of Phenylethanoid Glycosides from Magnolia officinalis

2016 ◽  
Vol 11 (12) ◽  
pp. 1934578X1601101 ◽  
Author(s):  
Zhenzhen Xue ◽  
Hua Li ◽  
Bin Yang
Keyword(s):  
Exposure Time ◽  
Critical Role ◽  
Phenylethanoid Glycosides ◽  
Positional Isomerization ◽  
Solvent Type ◽  
Magnolia Officinalis ◽  
Final Purification

Positional isomerization, an inducement leading to instability of phenylethanoid glycosides (PhGs) containing the caffeoyl moiety linked to C-3/4 of the central saccharide, is reported. Magnolosides M, A and F from Magnolia officinalis were found to be transformed into their isomers magnolosides A, D, M and B, respectively, which indicated that PhGs containing the caffeoyl moiety linking to C-3/4 of the central saccharide were unstable, and the caffeoyl group could be transferred to either C-4/3 or C-6 of the central saccharide. In addition, among the factors of temperature, solvent type and exposure time in solvent, temperature was found to play a critical role in initiation of positional isomerization of PhGs. In order to retard this isomerization, the temperature should be lower than 40°C during the final purification stages of PhGs.

scholarly journals Total phenylethanoid glycosides and magnoloside IafromMagnolia officinalisvar.bilobafruits inhibit ultraviolet B-induced phototoxicity and inflammation through MAPK/NF-κB signaling pathways

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 4362-4371 ◽  
Author(s):  
Lanlan Ge ◽  
Ling Chen ◽  
Qigui Mo ◽  
Gao Zhou ◽  
Xiaoshan Meng ◽  
...  
Keyword(s):  
European Union ◽  
United Kingdom ◽  
Traditional Medicine ◽  
Signaling Pathways ◽  
Food Additive ◽  
Ultraviolet B ◽  
The European Union ◽  
Phenylethanoid Glycosides ◽  
The United Kingdom ◽  
Magnolia Officinalis

Magnolia officinalisvar.bilobais used as a traditional medicine in China and as a food additive in the United Kingdom and the European Union.

Cardiovascular Modulating Effects of Magnolol and Honokiol, Two Polyphenolic Compounds from Traditional Chinese Medicine-Magnolia Officinalis

2020 ◽  
Vol 21 (6) ◽  
pp. 559-572 ◽  
Author(s):  
Yuan Yuan ◽  
Xiaocui Zhou ◽  
Yuanyuan Wang ◽  
Yan Wang ◽  
Xiangyan Teng ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Cardiac Hypertrophy ◽  
Therapeutic Potential ◽  
Current Data ◽  
Polyphenolic Compounds ◽  
Comprehensive Review ◽  
Magnolia Officinalis

Honokiol and its isomer magnolol are poly-phenolic compounds isolated from the Magnolia officinalis that exert cardiovascular modulating effects via a variety of mechanisms. They are used as blood-quickening and stasis-dispelling agents in Traditional Chinese Medicine and confirmed to have therapeutic potential in atherosclerosis, thrombosis, hypertension, and cardiac hypertrophy. This comprehensive review summarizes the current data regarding the cardioprotective mechanisms of those compounds and identifies areas for further research.

Verbascum sinaiticum: A Rich Source of Antioxidant Phenylethanoid Glycosides

2020 ◽  
Vol 10 (2) ◽  
pp. 158-162 ◽  
Author(s):  
Humaira Yasmeen Gondal ◽  
Roshan Zamir ◽  
Muhammad Nisar ◽  
Muhammad Iqbal Choudhary
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Aerial Part ◽  
Methanolic Extract ◽  
Water Soluble ◽  
Antioxidant Potential ◽  
Active Fraction ◽  
Phenylethanoid Glycosides ◽  
Active Constituents ◽  
Soluble Part

Background: The genus Verbascum is well documented for its antioxidant potential but Verbascum sinaiticum is comparatively less studied plant. The current study was carried out to search for antioxidant nutraceuticals from this species. Objective: To explore the antioxidant potential of Verbascum sinaiticum and to identify its active constituents. Methods: The methanolic extract of air-dried aerial part of the Verbascum sinaiticum was partitioned with hexane, chloroform and ethyl acetate. The water-soluble part of ethyl acetate afforded six phenylethanoid glycosides by repeated chromatography over Sephadex LH-20, silica gel and ODS columns. Antioxidant activity of solvent extracts and isolated constituents were evaluated by DPPH, ABTS and FRAP assays. Results: Six phenylethanoid glycosides was isolated and characterized as Verbascoside, Eukovoside, Martynoside, Jionoside D, Campneoside I and Campneoside II, from the most active fraction. Conclusion: Verbascum sinaiticum demonstrated prospective antioxidant activity. The watersoluble part of EtOAc (WSEAE) was found the most active extract whereas Verbascoside was identified as the most potent constituent. All isolated compounds exhibited significant antioxidant activity whereas their synergistic effect was found prominent in the parent fraction.

Scattering of Low-Energy (5-12 eV) C2D4•+ Ions from Room-Temperature Carbon Surfaces

2008 ◽  
Vol 73 (6-7) ◽  
pp. 755-770 ◽  
Author(s):  
Andriy Pysanenko ◽  
Ján Žabka ◽  
Zdeněk Herman
Keyword(s):  
Survival Probability ◽  
Room Temperature ◽  
Incident Angle ◽  
Pyrolytic Graphite ◽  
Carbon Surface ◽  
Translational Energy ◽  
Energy Distributions ◽  
Surface Mass ◽  
Fragment Ions ◽  
Product Ions

The scattering of the hydrocarbon radical cation C2D4•+ from room-temperature carbon (highly oriented pyrolytic graphite, HOPG) surface was investigated at low incident energies of 6-12 eV. Mass spectra, angular and translational energy distributions of product ions were measured. From these data, information on processes at surfaces, absolute ion survival probability, and kinematics of the collision was obtained. The projectile ion showed both inelastic, dissociative and reactive scattering, namely the occurrence of H-atom transfer reaction with hydrocarbons present on the room-temperature carbon surface. The absolute survival probability of the ions for the incident angle of 30° (with respect to the surface) decreased from about 1.0% (16 eV) towards zero at incident energies below 10 eV. Estimation of the effective surface mass involved in the collision process led to m(S)eff of about 57 a.m.u. for inelastic non-dissociative collisions of C2D4•+ and of about 115 a.m.u. for fragment ions (C2D3+, C2D2•+) and ions formed in reactive surface collisions (C2D4H+, C2D2H+, contributions to C2D3+ and C2D2•+). This suggested a rather complex interaction between the projectile ion and the hydrocarbon-covered surface during the collision.

Comparison of isomeric C3H7O+ ion mobilities using fragment ions from 2-butanol and tert-butanol in He and Ne

2020 ◽  
Vol 739 ◽  
pp. 137045
Author(s):  
Kazunari Takaya ◽  
Yuya Hasegawa ◽  
Tetsuo Koizumi
Keyword(s):  
Tert Butanol ◽  
Fragment Ions
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