iSGTW - International Science Grid This Week
iSGTW - International Science Grid This Week
Null

Home > iSGTW 29 August 2007 > iSGTW Image of the week - Anti-cancer agent in watery bind

 

Image of the week - Anti-cancer agent in watery bind


Water molecules bind to anti-cancer agent 5-fluorouracil to prevent formation of a newly discovered form II polymorph. All molecules are immersed in liquid nitromethane, which is not shown for reasons of clarity.
Image courtesy of Said Hamad

These images show the interactions of water molecules with each other and with molecules of anti-cancer agent 5-fluorouracil in nitromethane solution.

These interactions are strong enough to prevent the formation of 5-fluorouracil clusters, which in turn prevents the formation of a more stable 5-fluorouracil polymorph: the elusive “form II”.

Only when water molecules are completely absent from the system will “form II” crystals appear.

This molecular dynamics investigation was carried out by investigators now at the University College London, as part of the Control and Prediction of the Organic Solid State project.

CPOSS is dedicated to predicting the crystalline structures of organic molecules and uses the e-science grid computing Condor pool at UCL to hunt for thermodynamically stable crystalline structures.

This search often reveals the existence of many equally stable crystal structures, which raises the possibilities of polymorphism and can lead to problems in producing the original solid form in a controlled manner.

 
The existence of crystal polymorphs poses a major problem for pharmaceutical companies, who are only licensed to sell their products in a specified solid form.
Image courtesy of Said Hamad

The existence of crystal polymorphs poses a major problem for pharmaceutical companies, who are only licensed to sell their products in a specified solid form, since although polymorphs are chemically identical, their physical properties, such as dissolution rates, differ.

CPOSS is funded by Research Councils UK.

CPOSS is having a free Open Day on 6 September 2007. Visitors are requested to pre-register for catering purposes.

 

Tags:



Null
 iSGTW 22 December 2010

Feature – Army of Women allies with CaBIG for online longitudinal studies

Special Announcement - iSGTW on Holiday

Video of the Week - Learn about LiDAR

 Announcements

NeHC launches social media

PRACE announces third Tier-0 machine

iRODS 2011 User Group Meeting

Jobs in distributed computing

 Subscribe

Enter your email address to subscribe to iSGTW.

Unsubscribe

 iSGTW Blog Watch

Keep up with the grid’s blogosphere

 Mark your calendar

December 2010

13-18, AGU Fall Meeting

14-16, UCC 2010

17, ICETI 2011 and ICSIT 2011

24, Abstract Submission deadline, EGI User Forum

 

January 2011

11, HPCS 2011 Submission Deadline

11, SPCloud 2011

22, ALENEX11

30 Jan – 3 Feb, ESCC/Internet2

 

February 2011

1 - 4, GlobusWorld '11

2, Lift 11

15 - 16, Cloudscape III


More calendar items . . .

 

FooterINFSOMEuropean CommissionDepartment of EnergyNational¬†Science¬†Foundation RSSHeadlines | Site Map