Redetermination ofL-tryptophan hydrobromide

Redetermination of l-tryptophan hydro­bromide

The redetermined crystal structure of the title compound, C(11)H(13)N(2)O(2) (+)·Br(-), is reported. Data collection at 100 K about three crystallographic axes resulted in a crystal structure with significantly higher precision in comparison to the two-dimensional data collected at 176 K [Takigawa et al. [(1966) Bull. Chem. Soc. Jpn, 39, 2369-2378]. The carboxyl group and indole ring system are...

Separation of Concerns in OFL

OFL (Open Flexible Languages) is the name of a meta-model for object-oriented programming languages based on classes. It relies on three essential concepts of these languages: the descriptions which are a generalisation of the notion of class, the relationships such as inheritance or aggregation and the languages themselves. OFL provides a customisation (hyper-genericity) of these three concept...

An Lil Version Ofl =

This pqjer establi^es a law-of-the-iterated-logarithm (LIL) version of the fundamental queueing fonnula i — X(f: Under regularity conditions, the continuous-time arrival counting process and queue-length process jointly obey an LIL when the discrete-time sequence of interanival times and waiting times jointly obey an LIL, and the limit sets are related. The standard relation L — \W appears as a...

Polymorphic Study of (-)-galanthamine Hydrobromide

Preparation of Arsenobetaine hydrobromide

Crystalline arsenobetaine hydrobromide is deposited directly on addition of trimethylarsine to a benzene solution of bromoacetic acid. The product is stable, non-deliquescent and may be readily converted into the free betaine by passage through basic ion exchange resin.