Results 21 to 30 of about 1,006,297 (273)
Molecules, 2022 Thirteen compounds were isolated from the Canavalia lineata pods and their inhibitory activities against human monoamine oxidase-A (hMAO-A) and -B (hMAO-B) were evaluated.
Jong Min Oh +9 more
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Tree-Ring Skeleton Plotting by Computer
, 1979 Skeleton plotting is an established manual technique for representing the relative narrowness of tree rings in a single radius. These plots can be used as a visual aid to crossdating.
Cropper, John Philip
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Universal elements of unitriangular matrices groups
Қарағанды университетінің хабаршысы. Математика сериясы, 2017 The following theorems are proved for a matrix g from the group of unitriangular matrices over a commutative and associative ring K of finite dimension of greater than three with unity: 1) if the matrix g is universal then all of its elements are on the
A.A. Konyrkhanova, N.G. Khisamiev
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Ring closing reaction in diarylethene captured by femtosecond electron crystallography [PDF]
, 2013 The photoinduced ring closing reaction in diarylethene, which serves as a modelsystem for understanding reactive crossings through conical intersections, was directly observed with atomic resolution using femtosecond electron diffraction.
Liu, Lai Chung +15 more
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On $\mathcal Z$-reflexive rings [PDF]
Mathematica BohemicaWe introduce the notion of $\mathcal Z$-reflexive rings to describe reflexivity of rings in terms of their singular ideals. We show that $\mathcal Z$-reflexive ring is proper common generalization of a central reflexive ring, $\mathcal Z$-reversible ring,
Nirbhay Kumar
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Minimal reversible nonsymmetric rings [PDF]
Journal of Pure and Applied Algebra, 2019 Marks showed that $\mathbb{F}_2Q_8$, the $\mathbb{F}_2$ group algebra over the quaternion group, is a reversible nonsymmetric ring, then questioned whether or not this ring is minimal with respect to cardinality. In this work, it is shown that the cardinality of a minimal reversible nonsymmetric ring is indeed 256.
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Magnetic reversal in nanoscopic ferromagnetic rings [PDF]
Physical Review B, 2006 We present a theory of magnetization reversal due to thermal fluctuations in thin submicron-scale rings composed of soft magnetic materials. The magnetization in such geometries is more stable against reversal than that in thin needles and other geometries, where sharp ends or edges can initiate nucleation of a reversed state. The 2D ring geometry also
Martens, Kirsten +2 more
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Aqueous extraction of limonin from Citrus reticulate Blanco
Czech Journal of Food Sciences, 2012 The replacement of organic solutions in the extraction of limonin from citrus seeds with an alkaline solution was investigated. This method was based on the reversible conversion of limonin to limonoate A-ring lactone via ring-opening of D-ring lactone ...
Can Liu +4 more
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, 2021 This paper introduces and studies nil-reversible rings wherein we call a ring R nil-reversible if the left and right annihilators of every nilpotent element of R are equal. Reversible rings (and hence reduced rings) form a proper subclass of nil-reversible rings and hence we provide some conditions for a nil-reversible ring to be reduced.
Subba, Sanjiv, Subedi, Tikaram
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CHIMIA, 1990 As a first case in the field of spirochromenes, the energy barrier for thermally reversible ring opening of 2,2?-spirobichromenes (Scheme) is measured by racemization of preparatively enriched enantiomers.
Barbara Stephan +3 more
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