نتایج جستجو برای: β d

تعداد نتایج: 741568  

Journal: :Molecules 2015
Pacôme Sientzoff Jane Hubert Coralie Janin Laurence Voutquenne-Nazabadioko Jean-Hugues Renault Jean-Marc Nuzillard Dominique Harakat Abdulmagid Alabdul Magid

Securigera varia (Fabaceae) is a common herbaceous perennial plant widely growing in Europe and Asia and purposely established for erosion control, roadside planting, and soil rehabilitation. The aim of this study was to determine the radical scavenging activity of a crude methanol extract of S. varia aerial parts by using the free radical DPPH (1,1-diphenyl-2-picrylhydrazyl) and to rapidly ide...

A. Hadjiakhoondi M. Aghaahmadi M. Safaei M.R. Delnavazi N. Yassa S. Biuki S. Tavakoli

Background and objectives: Phlomis bruguieri Desf. (Lamiaceae) is a perennial herbaceous plant distributed in Iran, Turkey and Iraq. Despite medicinal potentials of this species, the current knowledge on its phytochemical constituents is limited. The aim of the present study was to investigate the phytochemical constituents of the essential oil and various extracts of ...

Journal: :Annals of Physics 2021

We study deterministic power-law quantum hopping model with an amplitude J(r)∝−r−β and local Gaussian disorder in low dimensions d=1,2 under the condition d<β<3d/2. demonstrate unusual combination of exponentially decreasing density ”tail states” localization–delocalization transition (as function strength W) pertinent to a small (vanishing thermodynamic limit) fraction eigenstates. In broad ra...

Journal: :Chemistry of Natural Compounds 1968

2013
rebaudiana Bertoni Venkata Sai Prakash Chaturvedula Steven Chen Oliver Yu Guohong Mao

The complete proton and carbon NMR spectral assignments of a diterpene glycoside isolated from the commercial extract of the leaves of Stevia rebaudiana Bertoni, 13-[(2-O-β-D-glucopyranosyl-3-O-β-D-glucopyranosyl-β-D-glucopyranosyl)oxy] ent-kaur-16-en-19-oic acid-[(2-O-α-L-rhamnopyranosyl-3-O-β-D-glucopyranosyl-β-D-glucopyranosyl) ester] (1); also known as rebaudioside N, was achieved by the ex...

2017
Yukiko Matsuo Daisuke Shinoda Aina Nakamaru Kuni Kamohara Hiroshi Sakagami Yoshihiro Mimaki

Phytochemical examination of Convallaria majalis (Liliaceae) whole plants yielded 15 steroidal glycosides (1-15), including nine new compounds (4-6, 10-15) with a lycotetrose unit. The structures of the new compounds were determined using two-dimensional Nuclear magnetic resonance (NMR) analyses and chemical methods. The isolated compounds were evaluated for cytotoxicity against HL-60 human pro...

Journal: :Fitoterapia 2011
Antoaneta Ivanova Bozhanka Mikhova Tsvetelina Batsalova Balik Dzhambazov Ivanka Kostova

The occurrence of the two new cis-fused A/B rings furostanol saponins (25S)-26-O-β-D-glucopyranosyl-5β-furostan-1β,3β,22α,26-tetraol-1-O-β-D-glucopyranoside and (25S)-26-O-β-D-glucopyranosyl-5β-furostan-1β,2β,3β,5β,22α,26-hexaol and the known compounds (25S)-26-O-β-D-glucopyranosyl-5β-furostan-3β,22α,26-triol-3-O-α-L-rhamnopyranosyl-(1 → 2)-O-β-D-glucopyranosyl-(1 → 2)-O-β-D-glucopyranoside and...

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