[ccp4bb] Crack-resistant tubes for centrifugation

2012-01-31 Thread Raji Edayathumangalam
Hi Folks, Are you any favorite brands out there for crack-resistant 50mL centrifugation tubes. It seems we are having recurring episodes of Falcon and Corning tubes cracking even at 9,000 rpm, which is the maximum speed possible with our rotor. I have used Falcon tubes for years in the past

Re: [ccp4bb] Crack-resistant tubes for centrifugation

2012-01-31 Thread Bosch, Juergen
To how many g does your 9000 rpm translate ? Perhaps that's the problem ? 10 minutes @ 5000xg for pelleting cells is more than enough in my opinion. Jürgen On Jan 31, 2012, at 11:59 AM, Raji Edayathumangalam wrote: Hi Folks, Are you any favorite brands out there for crack-resistant 50mL

Re: [ccp4bb] Crack-resistant tubes for centrifugation

2012-01-31 Thread Raji Edayathumangalam
9000 rpm translates to 13,000 g on this centrifuge/rotor. I am not referring to pelleting bacterial cells. My question is about centrifuging bacterial lysates and some recommendations for sturdy tubes. Thanks. Raji On Tue, Jan 31, 2012 at 12:02 PM, Bosch, Juergen jubo...@jhsph.edu wrote: To

Re: [ccp4bb] Crack-resistant tubes for centrifugation

2012-01-31 Thread Bosch, Juergen
Sorry I misunderstood that, I thought you wanted to pellet cells. Well in that case my reply would have been get some 50ml Nalgene tubes (I think they are good to 5xg) for an SS-34 rotor and spin your lysate at the maximum g force you can get for 30 minutes to get a good pellet. This will

Re: [ccp4bb] Crack-resistant tubes for centrifugation

2012-01-31 Thread Martin Hällberg
Raji, we use the 50 ml Cornings up to 25K RCF in our F13S-14x50cy rotor without leakage so it could be a batch specific problem with your Corning tubes. Try to talk to Piramoon or one their resellers (Thermo?) in your country if they have some batches of 50 ml tubes in stock that they can

Re: [ccp4bb] Crack-resistant tubes for centrifugation

2012-01-31 Thread Artem Evdokimov
In our hands the polyethylene tubes work even at 11krpm or over 30kg forces. But NOT polycarbonate ones. On Jan 31, 2012 10:59 AM, Raji Edayathumangalam r...@brandeis.edu wrote: Hi Folks, Are you any favorite brands out there for crack-resistant 50mL centrifugation tubes. It seems we are