Entries for March 01, 2006

arXiv.org e-Print Archive

Hosted by Cornell University, arXiv.org is an e-print service in the fields of physics, mathematics, non-linear science, computer science, and quantitative biology. As of February 27, 2006, it contained over 350,000 e-prints. The major subject categories are broken down into more specific subjects that allow the user to find papers of relevance to their research. Abstracts can be viewed in html and the full papers are available in PDF. RSS feeds are available for individual archives and categories.

What is SMILES?

SMILES (Simplified Molecular Input Line Entry Specification) is a simple yet comprehensive chemical nomenclature. SMILES is widely used as a general-purpose chemical nomenclature and data exchange format. I am sure you have seen examples like elemental gold [Au], carbon dioxide O=C=O, or nitrobenzene c1ccccc1[N+](=O)[O-].

Daylight Chemical Information Systems, Inc. has put together several SMILES resources such as a directory of resources and a tutorial.

Development of the First Periodic Table

Here is a resource that shares information on the development of Mendeleev's First Periodic Table. It also has links to some several extra items, such as a picture of Mendeleev and a draft of his first table.