Results 281 to 290 of about 872,781 (311)
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Journal of Medicinal Chemistry, 1975
Several acyloxy and alkyl derivatives of ellipticine have been prepared. In addition, a modified synthesis leading to the hitherto unobtainable 8,9-dimethoxy- and 8,9-methylenedioxyellipticines is described. Some of the derivatives described herein exhibit antitumor activity.
R W, Guthrie +5 more
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Several acyloxy and alkyl derivatives of ellipticine have been prepared. In addition, a modified synthesis leading to the hitherto unobtainable 8,9-dimethoxy- and 8,9-methylenedioxyellipticines is described. Some of the derivatives described herein exhibit antitumor activity.
R W, Guthrie +5 more
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Derived Equivalences As Derived Functors
Journal of the London Mathematical Society, 1991In [J. Lond. Math. Soc., II. Ser. 39, No.3, 436-456 (1989; Zbl 0642.16034)], we proved that two algebras \(\Lambda\) and \(\Gamma\) are ``derived equivalent'', meaning that the derived category of modules for \(\Lambda\) is equivalent to that for \(\Gamma\), precisely when \(\Gamma\) is isomorphic to the endomorphism ring of what we called a ``tilting ...
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NORMAL DERIVATIONS AND SEQUENT DERIVATIONS
Journal of Philosophical Logic, 2008Normal proofs in natural deduction systems for intuitionistic logic roughly correspond to cut-free sequent derivations. This article elaborates on this correspondence. First, a system \(\mathcal{N}\) for natural deductions and a system \(\mathcal{S}\) for sequent derivations are introduced.
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Tetramethylcyclopentadienylselenium derivatives
Organic & Biomolecular Chemistry, 2005Bis(1,2,3,4-tetramethylcyclopentadienyl)selane (1) has been prepared by the reaction of tetramethylcyclopentadienyllithium (Cp(t)Li) with selenium bis(diethyldithiocarbamate). Treatment of Cp(t)Li with elemental selenium, followed by air oxidation, led to loss of the allylic hydrogen atom, and formation of the novel tricyclic compound 1,4,5,6,7,10,11 ...
Susan, Ford +4 more
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[Electrocardiograms: derived derivations!]
Revue de l'infirmiere, 2018Simple and non-invasive, the electrocardiogram is a basic examination for studying how the cardiac muscle functions. Very commonly used, it nonetheless requires great rigour when applying the electrodes to avoid false results that can be harmful to appropriate care for the patient. A reminder of good practices.
Vincent, Gelé +3 more
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Derivatives and Derivative Markets
2006In this chapter we introduce readers to the nuts and bolts of derivatives. The objective is, however, different from that found in an introductory finance textbook. There are now many good texts on derivatives, explaining how they are priced and strategies for trading them. There is no point in repeating that content. Rather, this chapter seeks to show
Dick Bryan, Michael Rafferty
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The Lancet, 2001
The pyrrolidone (2-oxopyrrolidine) family of chemicals has been the subject of research for more than three decades. Experimental and clinical work first focused on their so-called nootropic effects; later came the possibilities for neuroprotection after stroke and use as antiepileptic agents.
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The pyrrolidone (2-oxopyrrolidine) family of chemicals has been the subject of research for more than three decades. Experimental and clinical work first focused on their so-called nootropic effects; later came the possibilities for neuroprotection after stroke and use as antiepileptic agents.
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Fundamenta Informaticae, 1993
The customary language-theoretic derivative of a word u with respect to a word v means the deletion of v from the beginning or end of u. We investigate the natural generalization, where v can be deleted from an arbitrary position in u. Apart from general closure and decidability properties, we pay special attention to regular languages, obtaining an ...
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The customary language-theoretic derivative of a word u with respect to a word v means the deletion of v from the beginning or end of u. We investigate the natural generalization, where v can be deleted from an arbitrary position in u. Apart from general closure and decidability properties, we pay special attention to regular languages, obtaining an ...
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Current Medicinal Chemistry, 2001
Resistance to glycopeptides in enterococci, which first emerged in the late 1980's and is now widespread mainly in the United States, is posing a serious clinical problem due to the lack of alternative and efficacious therapeutic options, particularly against infections caused by VanA strains that are highly resistant to glycopeptides and almost all ...
A, Malabarba, R, Ciabatti
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Resistance to glycopeptides in enterococci, which first emerged in the late 1980's and is now widespread mainly in the United States, is posing a serious clinical problem due to the lack of alternative and efficacious therapeutic options, particularly against infections caused by VanA strains that are highly resistant to glycopeptides and almost all ...
A, Malabarba, R, Ciabatti
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