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Post Archive
2014 (2)2013 (4)2012 (6)2011 (21)
October (7)August (3)July (1)

More Troubleshooting
Wednesday, July 13, 2011
June (1)

End to the sonication saga
Tuesday, June 7, 2011
May (1)April (2)March (4)

Thwart the NYtimes paywall
Thursday, March 17, 2011

Circle of life
Thursday, March 17, 2011

Curing a plague: Cryptocaryon irritans
Wednesday, March 9, 2011

Video: First new fish in 6 months!!
Wednesday, March 2, 2011
February (1)January (1)
2010 (13)
December (3)

The first step is the most important
Thursday, December 30, 2010

Have we really found a stem cell cure for HIV?
Wednesday, December 15, 2010

This paper saved my graduate career
Tuesday, December 14, 2010
November (3)

Valium or Sex: How do you like your science promotion
Tuesday, November 23, 2010

A wedding pic.
Tuesday, November 16, 2010

To rule by terror
Tuesday, November 9, 2010
October (2)September (5)

Hiccupping Hubris
Wednesday, September 22, 2010

A death in the family :(
Monday, September 20, 2010

The new lab fish!
Friday, September 10, 2010

What I wish I knew...Before applying to graduate school
Tuesday, September 7, 2010

Stopping viruses by targeting human proteins
Tuesday, September 7, 2010
Blogger Profile

Brian Krueger, PhD
Duke University
Durham NC USA

Brian Krueger is the owner, creator and coder of LabSpaces by night and Next Generation Sequencer by day. He currently runs Dr. David Goldstein's sequencing facility at the Center for Human Genome Variation (CHGV). In his blog you will find articles about technology, molecular biology, and editorial comments on the current state of science on the internet.

My posts are presented as opinion and commentary and do not represent the views of LabSpaces Productions, LLC, my employer, or my educational institution.

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Recent Comments

Jaeson, that's not true at most places.  Top tier, sure, but 1100+ should get you past the first filter of most PhD programs in the sciences. . . .Read More
Jun 24, 2013, 8:39am

All I can say is that GRE's really do matter at the University of California....I had amazing grades, as well as a Master's degree with stellar grades, government scholarships, publication, confere. . .Read More
Jun 19, 2013, 11:00pm

Hi Brian, I am certainly interested in both continuity and accuracy of PacBio sequencing. However, I no longer fear the 15% error rate like I first did, because we have more-or-less worked . . .Read More
Feb 26, 2013, 12:13am

Great stuff Jeremy!  You bring up good points about gaps and bioinformatics.  Despite the advances in technology, there is a lot of extra work that goes into assembling a de novo genome on the ba. . .Read More
Feb 25, 2013, 10:20am

Brian,I don't know why shatz doesn't appear to be concerned about the accuracy of Pacbio for plant applications. You would have to ask him. We operate in different spaces- shatz is concerned a. . .Read More
Feb 25, 2013, 8:01am
Views: 8647 | Comments: 6
Last by Mike Gruidl on Feb 22, 2013, 1:22pm
It's bound to happen in every lab. Someone is going to get distracted and for whatever reason a box full of tubes or tubes themselves are going to accidentally get dropped in the lab's liquid nitrogen container. A lot of people might say, "Screw it," and leave those samples on the bottom of the tank. This might be a good solution for some samples, but what happens when you drop half a rack of boxes to the bottom of your tank? And what happens when those boxes are full of very important cell lines that keep your lab running?

I don't want to admit it, but this is exactly what happened to me today. I was preparing an order for a collaborator and getting 5 of my cell lines out of liquid nitrogen storage. I was explaining to my summer students how to safely handle liquid nitrogen, always wear cryoprotective gloves, lift the rack slowly and be sure to drain all of the liquid nitrogen before handling the boxes, etc. I got the box I needed, and put the rack back in the tank while I was hunting for my cells. Unfortunately, I forgot to put the wire back in the rack that holds the boxes in place. When I went to put the box back that I was handling, I pulled the rack up and half the boxes were gone. "Oh, shit."

So now the rack doesn't fit in . . . More
Views: 863 | Comments: 1
Last by Brian Krueger, PhD on Apr 24, 2011, 7:31pm
I've been working on this project on and off for a few months now. You may remember my previous post about attempting sonication trials. Unfortunately, things in lab have been busy trying to get a new graduate student started and troubleshooting problems with other experiments so I haven't had as much time to devote to this project as I would like. I've spent the past month or so trying to optimize my sonication conditions on a sonicator that's in my building, and I've gotten less than spectacular results (I've tested at least 10 different conditions on this machine ex: buffers, cell densities, sonication intensity, sonication duration). I'm looking to break my DNA up into short 100-300 base pair fragments and previously I was only able to get them down to about 600. I decided it was time to test other sonicators and here are the results.


Fisher 100 sonic dismembrator vs Misonix 4000 - 1/8" tapered tip.1 mL of RIPA buffer containing 1x107 cells. Numbers above the lanes indicate the number of cycles that were done (30 seconds on 1.5 minutes of rest between cycles)

. . . More
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