Re: [ccp4bb] detectors on home sources

2013-04-30 Thread Fareed Aboul-Ela
Thanks so much for the generous replies I received so far both on and offline. By the way we visited the three top vendors and saw the systems in operation. We were slightly handicapped since at startup we don't yet have crystals and had to rely on standards, but the applications scientists were a

Re: [ccp4bb] detectors on home sources

2013-04-30 Thread mjvdwoerd
I second this opinion. At the end of next week our Pilatus 200K will be delivered. Soon after that I will be able to report on its characteristics. But really, Boaz nailed it: reliability and service are very important. It does not matter how good something is on paper if you cannot keep it ru

Re: [ccp4bb] detectors on home sources

2013-04-30 Thread Boaz Shaanan
One of the main things (if not THE main thing) to worry about when investing in such expensive equipment is long-time reliability and quality of service in your place. Nothing is more frustrating than seeing your wonderful and expensive equipment standing idle for long periods because of lack o

Re: [ccp4bb] detectors on home sources

2013-04-30 Thread David Schuller
The Excillum MetalJet (TM) source is technically very interesting, with its liquid metal jet anode, but I have no idea how well it works for typical in-house crystallography use. On 04/30/13 15:00, Fareed Aboul-Ela wrote: I'm involved in advising my institute on an X-ray home source for a co

[ccp4bb] detectors on home sources

2013-04-30 Thread Fareed Aboul-Ela
I'm involved in advising my institute on an X-ray home source for a core facility. The vendors are offering some new configurations. Whatever the claimed advantages/disadvantages, I'm hesitant to make a decision without consulting someone with direct experience with them. In particular, has anyon

[ccp4bb] Survey on selenium-derivatized nucleic acids for crystallographic applications

2013-04-30 Thread Sibo Jiang
Dear Crystallographers, This 10-question survey is conducted on behalf of the NSF-funded program. It is designed to get feedback from the structural biology community on selenium-derivatized nucleic acids for crystallographic applications. Your participation in this survey is greatly appreciate

Re: [ccp4bb] Puzzling Structure

2013-04-30 Thread MARTYN SYMMONS
And as a footnote* - * I notice that, following discussion on this bulletin board, the space group of the 2wlv coordinate file has been up

Re: [ccp4bb] refinement hanging--what am I missing?

2013-04-30 Thread Eleanor Dodson
What is the relationship between the molecules in the spacegroups - it seems likely that in the bigger cell there is a NC translation of ~(1/2,y,z)? ? (A2 ~ twice a1) That can be checked by the native Patterson.. If so that gives a class of significantly weaker reflections for h odd, and that usu

Re: [ccp4bb] Poor electron density in some of the chains in an asymmetric unit

2013-04-30 Thread sonali dhindwal
Dear All, Thanks for the reply. I will try process and refine the data again, will see if it improves. Thanks again to all.   -- Sonali Dhindwal “Live as if you were to die tomorrow. Learn as if you were to live forever.” From: Mark van Raaij To: CCP4BB