نتایج جستجو برای: free β

تعداد نتایج: 684769  

2011
Kei Shimoda Hiroki Hamada Hatsuyuki Hamada

The biocatalytic synthesis of xylooligosaccharides of daidzein was investigated using cultured cells of Catharanthus roseus and Aspergillus sp. β-xylosidase. The cultured cells of C. roseus converted daidzein into its 4'-O-β-glucoside, 7-O-β-glucoside, and 7-O-β-primeveroside, which was a new compound. The 7-O-β-primeveroside of daidzein was further xylosylated by Aspergillus sp. β-xylosidase t...

Journal: :Chemical communications 2013
Srimanta Manna Sandipan Jana Tapish Saboo Arun Maji Debabrata Maiti

Nitroolefins are usually synthesized using the Henry reaction. Here we report an alternative metal-free decarboxylative nitration protocol for the preparation of the nitroolefins from α,β-unsaturated carboxylic acids using t-butylnitrite (t-BuONO) and TEMPO. α,β-Unsaturated carboxylic acids bearing β-aromatic and β-heteroaromatic substituents gave (E)-nitroolefins exclusively under mild conditi...

2008
CHRISTIAN GUTSCHWAGER C. GUTSCHWAGER

In this paper we show that two skew diagrams λ/μ and α/β can represent the same multiplicity free skew character [λ/μ] = [α/β] only in the the trivial cases when λ/μ and α/β are the same up to translation or rotation or if λ = α is a staircase partition λ = (l, l − 1, . . . , 2, 1) and λ/μ and α/β are conjugate of each other.

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...

2002
H. Arisue

New algorithm of the finite lattice method is presented to generate the high-temperature expansion series of the Ising model. It enables us to obtain much longer series in three dimensions when compared not only to the previous algorithm of the finite lattice method but also to the standard graphical method. It is applied to extend the high-temperature series of the simple cubic Ising model fro...

Journal: :journal of sciences, islamic republic of iran 2014
b. pouramiri e. tavakolinejad kermany h. khajesamani h. khabazzadeh

an improved, simple, and facile synthesis of 3,4-dihydropyrimidin-2(1h)-ones by employing three-component, one-pot condensation reaction of β-keto ester, aromatic aldehydes, and urea or n-methylurea using lacl3/clch2cooh as an inexpensive and green chemistry catalyst system under solvent-free conditions described. compared with the classicalbiginelli reaction conditions, this method has the adv...

2017
Maryam MIRZA-AGHAYAN Farzaneh ALVANDI Mahdieh MOLAEE TAVANA Rabah BOUKHERROUB

Graphite oxide as a heterogeneous and recyclable solid acid catalyzed a simple and efficient method for the synthesis of β -amino alcohols by ring opening of epoxides with amines. This method is effective with various aromatic and aliphatic amines under solvent-free conditions. The corresponding β -amino alcohols are obtained in high yields (56%–95%) and short reaction times (15–30 min) with hi...

2008
Hiroaki ARISUE H. Arisue

We extend the high-temperature series of the free energy for the XY model in two dimensions to order β from the previous order of β by applying an improved algorithm of the finite lattice method. The long series obtained allows us to conclude that the behavior of the free energy is consistent to high accuracy with what is expected when the phase transition of the model is of the Kosterlitz-Thou...

Journal: :Food Science and Technology 2021

Immature Litsea mollis fruits (ILMFs) are widely used as cold appetizers and seasonings in China. The free bound volatile components of ILMFs from five distinct regions China were determined by gas chromatography-mass spectrometry (GC-MS) combined with headspace solid phase microextraction (SPME) the present work. results reveal sixty six free-form volatiles fifty two bound-form terpene hydroca...

2011
Kei Shimoda Naoji Kubota Hiroki Hamada

The synthesis of gentiooligosaccharides of genistein and glycitein using cultured cells of Eucalyptus perriniana as biocatalysts was investigated. The cells of E. perriniana glycosylated genistein and glycitein to give the corresponding 4'-O-β-glucosides, 7-O-β-glucosides, and 7-O-β-gentiobiosides, which were two new compounds. The β-glucosides of genistein and glycitein showed 2,2-diphenyl-1-p...

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