Results 291 to 300 of about 1,710,924 (336)

Modified synthesis of dl-N-norarmepavine and dl-armepavine

Journal of Pharmaceutical Sciences, 1967
The synthesis of dl - N -norarmepavine and dl -armepavine, utilizing the carboethoxy protecting group, is described.
J, Sam, A J, Bej
openaire   +2 more sources

A simple, stereospecific synthesis of DL-muscarine and DL-allomuscarine

Tetrahedron Letters, 1968
Abstract A bromolactone (VII) was stereospecifically converted to a tetrabydrofuran (IVa, Me/CO2H cis) and a dimethylamide (VIII, Me/CONMe2 trans. Possible mechanisms for these reactions are discussed. Since IVa and VIII have been transformed to dl -muscarine (I) and dl -allomuscarine (II) respectively, stereospecific formation of IVa and VIII ...
T. Matsumoto, A. Ichihara, N. Ito
openaire   +1 more source

Terahertz Spectroscopy and Density Functional Theory Calculations of dl-Norleucine and dl-Methionine.

Journal of Physical Chemistry A, 2018
We present terahertz (THz) measurements and density functional theory (DFT) calculations of two amino acid crystals: dl-norleucine and dl-methionine. Their molecular structures are very similar and therefore also their crystal structures.
J. Neu, Heinrich Nikonow, C. Schmuttenmaer   +2 more
semanticscholar   +1 more source

DL-Learner - A framework for inductive learning on the Semantic Web

Journal of Web Semantics, 2016
In this system paper, we describe the DL-Learner framework, which supports supervised machine learning using OWL and RDF for background knowledge representation.
Lorenz Bühmann, Jens Lehmann, Patrick Westphal   +2 more
semanticscholar   +1 more source

ChemInform Abstract: Synthesis of dl‐Vincadifformine, dl‐Eburcine and dl‐3‐Epieburcine.

Chemischer Informationsdienst, 1986
AbstractVilsmeier‐ ‐Haack reaction of the dehydroaspidospermidine (Ia) provides the unanticipated pyridone (II), whose structure was confirmed by hydrogenation to (III).
K. YOSHIDA, S. NOMURA, Y. BAN
openaire   +1 more source

SPARQL-DL: SPARQL Query for OWL-DL. [PDF]

, 2007
There are many query languages (QLs) that can be used to query RDF and OWL ontologies but neither type is satisfactory for querying OWL-DL ontologies. RDF-based QLs (RDQL, SeRQL, SPARQL) are harder to give a semantics w.r.t. OWL-DL and are more powerful than what OWL-DL reasoners can provide.
Sirin, Evren, Parsia, Bijan
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POLYMORPHISM OF THE DL-A SYSTEM

Transplantation, 1972
SUMMARY The major histocompatibility system of the dog (DL-A) was studied in more detail by immunogenetical methods. Suggestive evidence for the existence of two closely linked DL-A (sub)loci was found. The definition of three alleles at the first sublocus was clear for both mongrel and beagle populations.
H M, Vriesendorp, R B, Epstein, J, D'Amaro, D L, Westbroek, J J, van Rood   +4 more
openaire   +2 more sources

Possibilistic DL-Lite

2013
DL-Lite is one of the most important fragment of description logics that allows a flexible representation of knowledge with a low computational complexity of the reasoning process. This paper investigates an extension of DL-Lite to deal with uncertainty associated with objects, concepts or relations using a possibility theory framework.
Benferhat, Salem, Bouraoui, Zied
openaire   +2 more sources

Total synthesis of some monomeric Vinca alkaloids: dl-vincadine, dl-vincaminoreine, dl-vincaminorine, dl-vincadifformine, dl-minovine, and dl-vincaminoridine

Journal of the American Chemical Society, 1968
J P, Kutney, K K, Chan, A, Failli, J M, Fromson, C, Gletsos, V R, Nelson   +5 more
openaire   +2 more sources

The Synthesis of DL-Threonine. II. Interconversion of DL-Threonine and DL-Allothreonine

Journal of the American Chemical Society, 1949
Karl. Pfister, C. A. Robinson, A. C. Shabica, Max. Tishler   +3 more
openaire   +2 more sources