Results 221 to 230 of about 1,628,729 (281)

Toward Chemoselective Modification of Selenocysteine-Containing Biomolecules Via Doubly Activated Cyclopropanes. [PDF]

open access: yesACS Omega
Yamakoshi H   +8 more
europepmc   +1 more source

ON THE COEFFICIENT RING IN A SEMIGROUP RING

Mathematics of the USSR-Izvestiya, 1976
In this paper we study the concept of the invariance of a ring relative to a commutative semigroup. Invariance is proved for certain Prufer rings and affine algebras relative to semigroups of a special class.Bibliography: 11 titles.
openaire   +2 more sources

Ring of Rings

Science, 2011
Chemistry The abstract prospect of using a circle to derive a square has intrigued scholars of geometry for centuries. Segawa et al. have now used a square to derive a circle. The arena in this case was chemistry, rather than mathematics, and the task at hand was to assemble a molecular ring composed in turn of 12 benzene rings, linked to one another ...
openaire   +1 more source

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