نتایج جستجو برای: β d

تعداد نتایج: 741568  

Journal: :Acta Crystallographica Section E Structure Reports Online 2007

Journal: :Molecules 2014
Fabiana Geller Renato Murillo Lisa Steinhauser Berta Heinzmann Klaus Albert Irmgard Merfort Stefan Laufer

Four new flavonol glycosides were isolated from the leaves of Brugmansia suaveolens: kaempferol 3-O-β-D-glucopyranosyl-(1'''→2'')-O-α-L-arabinopyranoside (1), kaempferol 3-O-β-D-glucopyranosyl-(1'''→2'')-O-α-L-arabinopyranoside-7-O-į-D-gluco-pyranoside (2), kaempferol 3-O-β-D-[6'''-O-(E-caffeoyl)]-glucopyranosyl-(1'''→2'')-O-α-l-arabinopyranoside-7-O-β-D-glucopyranoside (3), and kaempferol 3-O-...

Journal: :Molecules 2016
Yang Xie Qiu-Shi Guo Guang-Shu Wang

Five flavonoid glycosides and two derivatives were isolated from the herbs of Scorzonera austriaca Wild by silica gel column chromatography and preparative HPLC. Their structures were identified, using chemical and spectroscopic methods, as 5,7,4'-trihydroxyflavone 6-C-(2''-O-β-d-glucopyranosyl β-d-glucopyranoside) (1), 5,7,3',4'-tetrahydroxyflavone 6-C-(2''-O-β-d-glucopyranosyl β-d-glucopyrano...

Journal: :Antibiotics 2014
Nuno T Antunes Jed F Fisher

The Class D β-lactamases have emerged as a prominent resistance mechanism against β-lactam antibiotics that previously had efficacy against infections caused by pathogenic bacteria, especially by Acinetobacter baumannii and the Enterobacteriaceae. The phenotypic and structural characteristics of these enzymes correlate to activities that are classified either as a narrow spectrum, an extended s...

2007
Bernadete P. da Silva José P. Parente

Three new steroidal saponins were isolated from the roots of Smilax officinalis Kunth. Their structures were established as (3β,5β,22α,25S)-26-(β-D-glucopyranosyloxy)-22-hydroxyfurostan-3-yl O-α-L-arabinopyranosyl-(1→6)-O-[β-D-glucopyranosyl-(1→4)]-β-D-glucopyranoside, (3β,5α,22α,25S)-26-(β-D-glucopyranosyloxy)-22-hydroxyfurostan-3-yl O-α-L-arabinopyranosyl-(1→6)-O-[β-D-glucopyranosyl-(1→4)]-β-...

Journal: :Annals of Probability 2022

We continue the study, initiated in (J. Eur. Math. Soc. (JEMS) 20 (2018) 199–257), of localization transition a lattice free field ϕ=(ϕ(x))x∈Zd, d≥3, presence quenched disordered substrate. The substrate affects interface at spatial sites which height is close to zero. This corresponds Hamiltonian ∑x∈Zd(βωx+h)δx, where δx= 1[−1,1](ϕ(x)), and (ωx)x∈Zd an i.i.d. centered field. A takes place when...

Journal: :CoRR 2012
Anton Salikhmetov

We positively answer the question A.1.6 in [2]: “Is there a recursive normalizing one-step reduction strategy for micro λ-calculus?” Micro λ-calculus refers to an implementation of the λ-calculus due to [1], implementing β-reduction by means of “micro steps” recursively distributing a β-redex (λx.M)N over its body M . 1 Inner spine strategy First, we provide “micro λ-calculus” with a more syste...

Journal: : 2022

Introduction. Natural sources, especially plants, have been used in folk medicine of various countries for many centuries and appears as rich sources natural compounds. One the interesting plants study is yellow loosestrife ( Lysimachia vulgaris L.), information on chemical composition which scarce. Aim. Carry out a phytochemical research L. aerial part, by isolation individual secondary metabo...

2009
Luis G. Gorostiza

We prove a functional limit theorem for the rescaled occupation time fluctuations of a (d, α, β)branching particle system (particles moving in R according to a symmetric α-stable Lévy process, branching law in the domain of attraction of a (1 + β)-stable law, 0 < β < 1, uniform Poisson initial state) in the case of intermediate dimensions, α/β < d < α(1 + β)/β. The limit is a process of the for...

Journal: :Organic & biomolecular chemistry 2012
Gustavo A Kashiwagi Verónica M Mendoza Rosa M de Lederkremer Carola Gallo-Rodriguez

The hexasaccharide β-D-Galp-(1→2)-[β-D-Galp-(1→3)]-β-D-Galp-(1→6)-[β-D-Galf(1→2)-β-D-Galf(1→4)]-D-GlcNAc (1) is the largest carbohydrate structure released as alditol by reductive β-elimination from mucins of some strains of T. cruzi. The terminal β-D-Galp units are sites of sialylation by trans-sialidase which transfers sialic acid from the host to the parasite. Hexasaccharide 1 was synthesize...

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