Martin Wessendorf-2 |
*****
To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** [Posted on behalf of Dr. Alexander Asanov.] Dear colleagues, Are you aware of quantitative data for the intensity of stray light in TIRF microscopy? I found only one paper by A. Mattheyses and D. Axelrod, 2006, which quantitatively estimated the intensity of stray light to be ~10–15% relative to the intensity of the evanescent wave at the TIRF interface [Mattheyses, A. L., and Axelrod D. Direct measurement of the evanescent field profile produced by objective-based total internal reflection fluorescence. J Biomed Opt. 2006 Jan-Feb;11(1):014006.] There are two 2014 papers by Martin Oheim’s group that referenced most of the literature and analyzed sources of stray light, but did not make a quantitative comparison. [Brunstein M, Teremetz M, Hérault K, Tourain C, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part I. identifying sources of nonevanescent excitation light. Biophys J. 2014 Mar 4;106(5):1020-32. Brunstein M, Hérault K, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part II. combined evanescent-wave excitation and supercritical-angle fluorescence detection improves optical sectioning. Biophys J. 2014 Mar 4;106(5):1044-56.] Does anybody know additional published or unpublished data with Quantitative comparison of the stray light with the evanescent wave? Thank you. Best regards, Alexander Asanov, Ph.D. TIRF Labs [hidden email] -- Martin Wessendorf, Ph.D. office: (612) 626-0145 Assoc Prof, Dept Neuroscience lab: (612) 624-2991 University of Minnesota Preferred FAX: (612) 624-8118 6-145 Jackson Hall, 321 Church St. SE Dept Fax: (612) 626-5009 Minneapolis, MN 55455 e-mail: [hidden email] |
John Oreopoulos |
*****
To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** Dear Alexander, I observed the stray light phenomenon for through-the objective TIRF in this paper: Oreopoulos, J. and C.M. Yip, Combined scanning probe and total internal reflection fluorescence microscopy. Methods, 2008. 46(1): p. 2-10. See Figure 4. However, in a very similar instrumental setup, the authors of this paper did not: Sarkar, A., R.B. Robertson, and J.M. Fernandez, Simultaneous atomic force microscope and fluorescence measurements of protein unfolding using a calibrated evanescent wave. Proceedings of the National Academy of Sciences of the United States of America, 2004. 101(35): p. 12882-12886. Other papers from the Oheim group that might interest you: Schapper, F., J.T. Goncalves, and M. Oheim, Fluorescence imaging with two-photon evanescent wave excitation. European Biophysics Journal with Biophysics Letters, 2003. 32(7): p. 635-643. Oheim, M. and F. Schapper, Non-linear evanescent-field imaging. Journal of Physics D-Applied Physics, 2005. 38(10): p. R185-R197. Cheers, John Oreopoulos On 2016-07-08, at 4:10 PM, Martin Wessendorf wrote: > ***** > To join, leave or search the confocal microscopy listserv, go to: > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy > Post images on http://www.imgur.com and include the link in your posting. > ***** > > [Posted on behalf of Dr. Alexander Asanov.] > > Dear colleagues, > > Are you aware of quantitative data for the intensity of stray light in TIRF microscopy? I found only one paper by A. Mattheyses and D. Axelrod, 2006, which quantitatively estimated the intensity of stray light to be ~10–15% relative to the intensity of the evanescent wave at the TIRF interface [Mattheyses, A. L., and Axelrod D. Direct measurement of the evanescent field profile produced by objective-based total internal reflection fluorescence. J Biomed Opt. 2006 Jan-Feb;11(1):014006.] > > There are two 2014 papers by Martin Oheim’s group that referenced most of the literature and analyzed sources of stray light, but did not make a quantitative comparison. [Brunstein M, Teremetz M, Hérault K, Tourain C, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part I. identifying sources of nonevanescent excitation light. Biophys J. 2014 Mar 4;106(5):1020-32. Brunstein M, Hérault K, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part II. combined evanescent-wave excitation and supercritical-angle fluorescence detection improves optical sectioning. Biophys J. 2014 Mar 4;106(5):1044-56.] > > Does anybody know additional published or unpublished data with Quantitative comparison of the stray light with the evanescent wave? Thank you. > > Best regards, > Alexander Asanov, Ph.D. > TIRF Labs > [hidden email] > > -- > Martin Wessendorf, Ph.D. office: (612) 626-0145 > Assoc Prof, Dept Neuroscience lab: (612) 624-2991 > University of Minnesota Preferred FAX: (612) 624-8118 > 6-145 Jackson Hall, 321 Church St. SE Dept Fax: (612) 626-5009 > Minneapolis, MN 55455 e-mail: [hidden email] |
Armstrong, Brian |
*****
To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** Hi John, pardon my laziness, but what advantage does 2P evanescent wave microscopy have over "1P"? Thanks, Brian Armstrong PhD Associate Research Professor Developmental and Stem Cell Biology Diabetes and Metabolic Diseases Director, Light Microscopy Core Beckman Research Institute, City of Hope -----Original Message----- From: Confocal Microscopy List [mailto:[hidden email]] On Behalf Of John Oreopoulos Sent: Monday, July 11, 2016 9:05 PM To: [hidden email] Subject: Re: Stray light in TIRF microscopy ***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** Dear Alexander, I observed the stray light phenomenon for through-the objective TIRF in this paper: Oreopoulos, J. and C.M. Yip, Combined scanning probe and total internal reflection fluorescence microscopy. Methods, 2008. 46(1): p. 2-10. See Figure 4. However, in a very similar instrumental setup, the authors of this paper did not: Sarkar, A., R.B. Robertson, and J.M. Fernandez, Simultaneous atomic force microscope and fluorescence measurements of protein unfolding using a calibrated evanescent wave. Proceedings of the National Academy of Sciences of the United States of America, 2004. 101(35): p. 12882-12886. Other papers from the Oheim group that might interest you: Schapper, F., J.T. Goncalves, and M. Oheim, Fluorescence imaging with two-photon evanescent wave excitation. European Biophysics Journal with Biophysics Letters, 2003. 32(7): p. 635-643. Oheim, M. and F. Schapper, Non-linear evanescent-field imaging. Journal of Physics D-Applied Physics, 2005. 38(10): p. R185-R197. Cheers, John Oreopoulos On 2016-07-08, at 4:10 PM, Martin Wessendorf wrote: > ***** > To join, leave or search the confocal microscopy listserv, go to: > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy > Post images on http://www.imgur.com and include the link in your posting. > ***** > > [Posted on behalf of Dr. Alexander Asanov.] > > Dear colleagues, > > Are you aware of quantitative data for the intensity of stray light in TIRF microscopy? I found only one paper by A. Mattheyses and D. Axelrod, 2006, which quantitatively estimated the intensity of stray light to be ~10-15% relative to the intensity of the evanescent wave at the TIRF interface [Mattheyses, A. L., and Axelrod D. Direct measurement of the evanescent field profile produced by objective-based total internal reflection fluorescence. J Biomed Opt. 2006 Jan-Feb;11(1):014006.] > > There are two 2014 papers by Martin Oheim's group that referenced most of the literature and analyzed sources of stray light, but did not make a quantitative comparison. [Brunstein M, Teremetz M, Hérault K, Tourain C, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part I. identifying sources of nonevanescent excitation light. Biophys J. 2014 Mar 4;106(5):1020-32. Brunstein M, Hérault K, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part II. combined evanescent-wave excitation and supercritical-angle fluorescence detection improves optical sectioning. Biophys J. 2014 Mar 4;106(5):1044-56.] > > Does anybody know additional published or unpublished data with Quantitative comparison of the stray light with the evanescent wave? Thank you. > > Best regards, > Alexander Asanov, Ph.D. > TIRF Labs > [hidden email] > > -- > Martin Wessendorf, Ph.D. office: (612) 626-0145 > Assoc Prof, Dept Neuroscience lab: (612) 624-2991 > University of Minnesota Preferred FAX: (612) 624-8118 > 6-145 Jackson Hall, 321 Church St. SE Dept Fax: (612) 626-5009 > Minneapolis, MN 55455 e-mail: [hidden email] --------------------------------------------------------------------- *SECURITY/CONFIDENTIALITY WARNING: This message and any attachments are intended solely for the individual or entity to which they are addressed. This communication may contain information that is privileged, confidential, or exempt from disclosure under applicable law (e.g., personal health information, research data, financial information). Because this e-mail has been sent without encryption, individuals other than the intended recipient may be able to view the information, forward it to others or tamper with the information without the knowledge or consent of the sender. If you are not the intended recipient, or the employee or person responsible for delivering the message to the intended recipient, any dissemination, distribution or copying of the communication is strictly prohibited. If you received the communication in error, please notify the sender immediately by replying to this message and deleting the message and any accompanying files from your system. If, due to the security risks, you do not wish to receive further communications via e-mail, please reply to this message and inform the sender that you do not wish to receive further e-mail from the sender. (fpc5p) --------------------------------------------------------------------- |
Craig Brideau |
*****
To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** In theory the 2p requirement will further limit the effect of the field closer to the surface. Craig On Jul 12, 2016 9:37 AM, "Armstrong, Brian" <[hidden email]> wrote: ***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** Hi John, pardon my laziness, but what advantage does 2P evanescent wave microscopy have over "1P"? Thanks, Brian Armstrong PhD Associate Research Professor Developmental and Stem Cell Biology Diabetes and Metabolic Diseases Director, Light Microscopy Core Beckman Research Institute, City of Hope -----Original Message----- From: Confocal Microscopy List [mailto:[hidden email]] On Behalf Of John Oreopoulos Sent: Monday, July 11, 2016 9:05 PM To: [hidden email] Subject: Re: Stray light in TIRF microscopy ***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** Dear Alexander, I observed the stray light phenomenon for through-the objective TIRF in this paper: Oreopoulos, J. and C.M. Yip, Combined scanning probe and total internal reflection fluorescence microscopy. Methods, 2008. 46(1): p. 2-10. See Figure 4. However, in a very similar instrumental setup, the authors of this paper did not: Sarkar, A., R.B. Robertson, and J.M. Fernandez, Simultaneous atomic force microscope and fluorescence measurements of protein unfolding using a calibrated evanescent wave. Proceedings of the National Academy of Sciences of the United States of America, 2004. 101(35): p. 12882-12886. Other papers from the Oheim group that might interest you: Schapper, F., J.T. Goncalves, and M. Oheim, Fluorescence imaging with two-photon evanescent wave excitation. European Biophysics Journal with Biophysics Letters, 2003. 32(7): p. 635-643. Oheim, M. and F. Schapper, Non-linear evanescent-field imaging. Journal of Physics D-Applied Physics, 2005. 38(10): p. R185-R197. Cheers, John Oreopoulos On 2016-07-08, at 4:10 PM, Martin Wessendorf wrote: > ***** > To join, leave or search the confocal microscopy listserv, go to: > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy > Post images on http://www.imgur.com and include the link in your posting. > ***** > > [Posted on behalf of Dr. Alexander Asanov.] > > Dear colleagues, > > Are you aware of quantitative data for the intensity of stray light in 2006, which quantitatively estimated the intensity of stray light to be ~10-15% relative to the intensity of the evanescent wave at the TIRF interface [Mattheyses, A. L., and Axelrod D. Direct measurement of the evanescent field profile produced by objective-based total internal reflection fluorescence. J Biomed Opt. 2006 Jan-Feb;11(1):014006.] > > There are two 2014 papers by Martin Oheim's group that referenced most of the literature and analyzed sources of stray light, but did not make a quantitative comparison. [Brunstein M, Teremetz M, Hérault K, Tourain C, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part I. identifying sources of nonevanescent excitation light. Biophys J. 2014 Mar 4;106(5):1020-32. Brunstein M, Hérault K, Oheim M. Eliminating unwanted far-field excitation in objective-type TIRF. Part II. combined evanescent-wave excitation and supercritical-angle fluorescence detection improves optical sectioning. Biophys J. 2014 Mar 4;106(5):1044-56.] > > Does anybody know additional published or unpublished data with Quantitative comparison of the stray light with the evanescent wave? Thank you. > > Best regards, > Alexander Asanov, Ph.D. > TIRF Labs > [hidden email] > > -- > Martin Wessendorf, Ph.D. office: (612) 626-0145 > Assoc Prof, Dept Neuroscience lab: (612) 624-2991 > University of Minnesota Preferred FAX: (612) 624-8118 > 6-145 Jackson Hall, 321 Church St. SE Dept Fax: (612) 626-5009 > Minneapolis, MN 55455 e-mail: [hidden email] --------------------------------------------------------------------- *SECURITY/CONFIDENTIALITY WARNING: This message and any attachments are intended solely for the individual or entity to which they are addressed. This communication may contain information that is privileged, confidential, or exempt from disclosure under applicable law (e.g., personal health information, research data, financial information). Because this e-mail has been sent without encryption, individuals other than the intended recipient may be able to view the information, forward it to others or tamper with the information without the knowledge or consent of the sender. If you are not the intended recipient, or the employee or person responsible for delivering the message to the intended recipient, any dissemination, distribution or copying of the communication is strictly prohibited. If you received the communication in error, please notify the sender immediately by replying to this message and deleting the message and any accompanying files from your system. If, due to the security risks, you do not wish to receive further communications via e-mail, please reply to this message and inform the sender that you do not wish to receive further e-mail from the sender. (fpc5p) --------------------------------------------------------------------- |
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