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Digitale Medien

Fitness costs of resource overlap among coexisting bird species (1996)

Martin, Thomas E.

[s.l.] : Nature Publishing Group

Nature 380 (1996), S. 338-340

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Competition for food is often assumed to be the cause of esource partitioning, but the risk of nest predation can theoretically increase with overlap in resource (nest site) selection, and thereby favour resource partitioning among coexisting species6"12. The risk of nest predation may increase ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/380338a0

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Digitale Medien

Ceramide-1-phosphate sugars: new types of glycophospholipids (1996)

Martin, Thomas J. ; Dufner, Gesche ; Kratzer, Bernd ; [weitere]

Springer

Glycoconjugate journal 13 (1996), S. 547-553

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ISSN: 1573-4986

Schlagwort(e): glycophospholipids ; ceramide-1-phosphate sugars ; azidosphingosine-1-phosphate sugars ; glycosyl phosphite ; glycosyl phosphate ; O-glycosyl trichloroacetimidate ; N-acetylneuraminic acid (Neu5Ac)

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract Ceramide-1-phosphate sugars were synthesized by direct glycosyl phosphite/phosphate andO-glycosyl trichloroacetimidate/phosphate exchange reactions, respectively. Thus, ceramide-1-O-phosphoric acid 5 gave with sialyl phosphite1 as sialyl donor directly β-linked sialyl phosphate6; deprotection afforded the corresponding glycophospholipid ceramide-1-phosphateN-acetylneuraminate7. Similarly, fromO-glucosyl- andO-galactosyltrichloroacetimidate10 and13 with phosphoric acid derivative5 glycosyl ceramide-1-phosphate sugars12 and15, respectively, were obtained.