<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1445277124881_2742">Hi all,</div><div id="yui_3_16_0_1_1445277124881_2742"><br></div><div class="" id="yui_3_16_0_1_1445277124881_2751">We had some strange AUC noise in a recent experiment. In the pictures below from SEDFIT, the first two runs produced data as in the picture NNBekman1 (the IT guys name our instruments and they pruposely mispelled Beckman as Bekman years ago). A strange noise pattern showed up in the scans that were produced on day one. Then the sample was loaded into a new cell and run again on the same centrifuge producing the strange noise pattern in the picture called NNBekman1. the filled cell was taken and gently mixed and then run on another centrifuge Bekman17 and made a perfectly fine patter shown in picture Beckman17.</div><div class="" id="yui_3_16_0_1_1445277124881_2751"><br></div><div class="" id="yui_3_16_0_1_1445277124881_2751">We have seen the strange noise before on our NNBekman1 centrifuge, but this is the first time on NNBekman2.</div><div class="" id="yui_3_16_0_1_1445277124881_2751"><br></div><div class="" id="yui_3_16_0_1_1445277124881_2751">Has anyone seen noise like this? </div><div class="" id="yui_3_16_0_1_1445277124881_2751">Any theories on the cause of the noise?</div><div class="" id="yui_3_16_0_1_1445277124881_2751"><br></div><div class="" id="yui_3_16_0_1_1445277124881_2751">It certainly looks like an optical artifact of some kind, but the time dependence is hard to explain.</div><div class="" id="yui_3_16_0_1_1445277124881_2751"><br></div><div class="" id="yui_3_16_0_1_1445277124881_2751">Kind Regards,</div><div class="" id="yui_3_16_0_1_1445277124881_2751"><br></div><div class="" id="yui_3_16_0_1_1445277124881_2751">David Hayes</div><div class="" id="yui_3_16_0_1_1445277124881_2751"><br></div><div id="yui_3_16_0_1_1445277124881_2742" dir="ltr">
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