JChemPaint too: PNG embedded connectivity tables

Rich blogged about Firefly embedding MDL molfiles in PNG images, which I found really cool. Rich and Noel later showed how that metadata can be retrieved again, possibly with Python.

1 minute read

Automatic Classification of thousands of Crystal Structures

Clustering and classification of crystal structures is hot. Parkin hit the front cover of CrystEngComm with a story on Comparing entire crystal structures: structural genetic fingerprinting (DOI:10.1039/b704177b). Now, the story itself, while rather interesting and well written, has three major flaws:

2 minute read

Dapagliflozin: the molecular structure

An anonymous reader reported that the American Medical Association published the structure of dapagliflozin. Here are the details.

less than 1 minute read

Operator 0.8 released: a new Sechemtic user script

Mike released Operator 0.8, which picks up RDF (RDFa en eRDF) from HTML pages, and adds actions to it. I blogged earlier about the beta and wrote a script for it for chemical RDFa. At this moment, Chemical blogspace and RDF for Molecular Space (see this blog) are using chemical RDFa to semantically markup molecular information.

1 minute read

Touchgraphing my blog

Via SciFoo Planet (from Partial immortalization ) I learned about TouchGraph Google (Peter brought it into Chemical blogspace). It’s cool, though not open source. Here’s the touch graph for my blog:

less than 1 minute read

Centralized or decentralized?

Peter wondered if data should be stored centralized or decentralized, when Deepak blogged about Freebase and Metaweb. Now, I haven’t really looked into these two projects, but the question of centralized versus decentralized is interesting. It’s MySQL versus the world wide web; it’s the PubChem compound ID versus the InChI; it’s http://cb.openmolecules.net/rdf/?InChI=1/CH4/h1H4 versus info:inchi/InChI=1/CH4/h1H4 (see RDF-ing molecular space ).

1 minute read

Molecular Connectivity Tables in Images

Rich blogged about to Never Draw the Same Molecule Twice: Viewing Image Metadata in which he shows his molecular editor outputting images of molecular structure where the connectivity table of structure is embedded in the image. His molecular editor can read the image again, and will automatically pick up the embedded connection table. Noel showed that such can not only be done in Java, but in Python too.

1 minute read