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*  Laser manipulation in liquid crystals: an approach to microfluidics and micromachines | Philosophical Transactions of the Royal...
We did measure the relative intensities of the π and σ polarizations after passing through droplets and we noted that droplet ... You described the use of optical tweezers to drag a colloidal particle through a nematic liquid and measure from the velocity ... The invention of optical trapping enabled experiments to be undertaken on micrometre-sized calcite particles that acted as wave ... so that spherical chiral nematic droplets are formed. A range of droplet diameters between 2 and 7 μm were studied. The optical ...
  http://rsta.royalsocietypublishing.org/content/364/1847/2789
*  New England Complex Fluids Workgroup
... which is a direct measure of the viscoelastic response of the material.. Keywords: Microrheology, Biopolymer, Optical tweezers ... Droplets in microfluidic chambers are a growing platform for both physics and biology experiments; droplets can be produced at ... We have developed a droplet-based microfluidics technology that is capable of first encapsulating single cells in droplet, ... In this study, we use optical tweezers to oscillate a particle inside reconstituted biopolymer networks and by measuring the ...
  http://www.complexfluids.org/necf/abstracts.php?meetingID=75
*  Microfluidic tools for cell biological research
... optical tweezers [116], or complex dedicated force machines [117]. Most of these apparatus measure global and local forces of ... In addition, large-scale experiments, which consist of doing a large number of experiments at the same time in different ... Picture of a cell trapping array using hydrodynamic trap and zoom on a single cell trap [168]. (B) Droplet based yeast culture ... developed a microfluidic device which was able to generate array of thousands of droplets with embedded yeast cells [177], and ...
  http://pubmedcentralcanada.ca/pmcc/articles/PMC2998071/
*  JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols
... optical tweezers, flow stretching, and magnetic tweezers. Amongst these approaches, magnetic tweezers have distinguished ... magnetic tweezers and the freely-orbiting magnetic tweezers, which makes it possible to directly measure the torque stored in a ... The conducted experiments have shown that the fixators were able to maintain a 5 mm femoral defect gap in rats in vivo during ... It is observed that there is interplay between momentum of the system (imparted by a combination of the droplets created by the ...
  https://www.jove.com/visualize/abstract/21559524/eugene-domain-specific-language-for-specifying-constraining-synthetic
*  Blog on Optical Tweezers: September 2009
Optical trapping experiments were used to measure directly the mechanical properties of these spirochetes. These results imply ... Using an optical barrier, droplets held in an optical trap can be effectively isolated from other droplets within the aerosol. ... It also facilitates the use of an isolated droplet of known composition as a sensitive probe of the gas phase conditions in an ... Optical Fiber Technology (1) Optical Materials (1) Optical Materials Express (3) Optical Memory and Neural Networks (1) Optical ...
  http://opticaltweezers.blogspot.com/2009_09_01_archive.html
*  Extraction and Characterization of Surfactants from Atmospheric Aerosols | Protocol
... experiments have shown that the surface tension measured is identical to that of micron-size droplets containing the same ... and the droplet volume should be monitored continuously to rule out evaporation effects. Each droplet must be left to ... Measure the surface tension of the diluted solution.. *Repeat step 5.2.2 until the solution has reached (or is close to) the ... Optical techniques, measuring directly the surface tension on micron-size particles without any extraction, are being developed ...
  https://www.jove.com/video/55622/extraction-characterization-surfactants-from-atmospheric
*  Blog on Optical Tweezers: June 2010
We briefly review the application of optical forces for cell manipulation and sorting, highlighting some of the key experiments ... manipulated with an optical trap, and a streptavidin-functionalized coverslip were used to measure the effect of different ... The coalescence of two droplets was observed and characterized.. DOI Email ThisBlogThis!Share to TwitterShare to FacebookShare ... Here, the nanoparticles covered the entire area of the assembled SnO2 rod by evaporating a droplet of nanoparticle solution ...
  http://opticaltweezers.blogspot.com/2010_06_01_archive.html
*  Publications | Stavans Lab
At large droplet volume fractions where droplets are deformed, the polymers enhance considerably the stability of the emulsion ... By scattering a focused laser beam from a particle observed in an optical microscope, we measure its fluctuations via the ... against droplet coalescence. We compare our results with recent experiments and models of colloid-polymer mixtures. ... this approach by measuring the three-dimensional force constants of a single bead and a pair of beads trapped by laser tweezers ...
  http://www.weizmann.ac.il/complex/stavans/publications
*  Analyzing Large Protein Complexes by Structural Mass Spectrometry | Protocol
The droplet size is a function of the tip diameter, which should be ~1 μm. Small droplets lead to more efficient ionization, ... Place the capillary under an optical microscope and trim the tip, using the sharp AA-type tweezers. ... Most of the experiments conducted on multi-protein complexes are performed using a nano electrospray quadrupole-time-of-flight ... Moreover, the technique can simultaneously measure the characteristics of separate populations co-existing in a mixture. ...
  https://www.jove.com/video/1954/analyzing-large-protein-complexes-by-structural-mass-spectrometry
*  Download Alien Encounters
Prerequisite of practice; transition tweezers findings in new military reflection projects. download of application; optical ... now 13 queue in link( more on the droplet). lost from and been by Amazon. Please call a sexual UK gene. Please become a ... other new experiments foresee considerable posts that are a just several download alien encounters to install while social ... The download alien that it is consistent to not like imaging TV critical ce( articulating fMRI and EEG) to measure whether ...
  http://pd19.org/ebook/download-alien-encounters
*  Blog on Optical Tweezers: November 2009
The optical properties of the droplet are determined using stimulated Raman scattering. The droplet is in thermodynamic ... and optical tweezers (OT) are combined to measure the interaction forces between blank SiO2 surfaces in aqueous ionic solutions ... We show experimentally that bipolar nematic liquid crystal droplets trapped in laser tweezers having circular polarization can ... Experiments in Fluids (1) Faraday Discussions (4) FEBS Journal (5) FEBS Letters (3) FEMS Microbiology Ecology (1) FEMS ...
  http://opticaltweezers.blogspot.com/2009_11_01_archive.html
*  JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols
... optical tweezers, flow stretching, and magnetic tweezers. Amongst these approaches, magnetic tweezers have distinguished ... and the inability to measure both positively and negatively charged ions in single experiments. Therefore, a novel metabolomics ... We validated the assay by comparing neutrophil migration from blood droplets collected from finger prick and venous blood. We ... In this assay, neutrophils migrate directly from the blood droplet, through small channels, towards the source of ...
  https://www.jove.com/visualize/abstract/19956649/systematic-differences-in-impact-across-publication-tracks-at-pnas
*  Blog on Optical Tweezers: September 2010
Droplet manipulation and trapping potential in such a two-dimensional anisotropic system show that optical trapping has two ... Finally, the validity of the numerical analysis in this work is confirmed by experiments.. DOI Email ThisBlogThis!Share to ... By combining experimental data with a physical model and an optimization algorithm for analysis, we measure the 10 unique ... Light-controlled movement of isotropic droplets in smectic films M. Conradi. This paper reports on optical trapping of ...
  http://opticaltweezers.blogspot.com/2010_09_01_archive.html
*  Blog on Optical Tweezers: April 2012
Optical Manipulation of Liquid Crystal Droplets Through Holographic Polarized Tweezers: Magnus Effect ... We present a simple method to calibrate optical tweezers by using only videomicroscopy to measure the position autocorrelation ... By performing single molecule stretching experiments with optical tweezers, we have studied the changes on the mechanical ... Smaller droplet sizes were preferentially selected with a 1.7 μm core diameter compared to cores of 2.7 μm and 4.5 μm. Further ...
  http://opticaltweezers.blogspot.com/2012_04_01_archive.html
*  Patente US20110229872 - Microfabricated Cell Sorter - Google Patentes
... can be sorted into an appropriate branch channel based on the presence or amount of a detectable signal such as an optical ... Optical Trapping. * [0175] In another embodiment, an optical trap, or laser tweezers, may be used to sort or direct cells in a ... then the first droplet might have a lower potential than the second droplets, and so on. Yet, charged droplets will have a ... Experiments have shown that high electric fields, in the range of 2-4 kV/cm for human erythrocytes and 5-10 kV/cm for yeast ...
  http://www.google.es/patents/US20110229872
*  Blog on Optical Tweezers: October 2009
We demonstrate the use of optical tweezers to manipulate and mix droplets. For example, using optical tweezers we bring two ... We applied oscillatory optical tweezers to measure the differential stiffness of dsDNA molecules, interacting with RecA, as a ... relevant to a broad range of trap-based single-molecule experiments-the most common biological application of optical tweezers- ... 2) Positive/negative photophoresis on a droplet: We show that a droplet is driven by a laser beam, either toward and backward ...
  http://opticaltweezers.blogspot.com/2009_10_01_archive.html
*  Blog on Optical Tweezers: February 2010
We used optical tweezers to measure the rupture force between HU proteins and Lon; HUα, HUβ, and HUβ-A20D can bind to Lon, and ... Side imaging was used in conjunction with imaging in the plane of the optical trap. Droplet sizing was performed using cavity- ... This represents the first report of the optical tweezing of aerosol droplets with a horizontally propagating laser beam. ... The usefulness of two-side imaging combined with optical manipulation is illustrated by three different experiments: multiple ...
  http://opticaltweezers.blogspot.com/2010/02/
*  Blog on Optical Tweezers: October 2012
We estimate the intensities necessary for this rebound of airborne droplets and change the droplet trajectories through a ... Auto- and cross-power spectral analysis of dual trap optical tweezer experiments using Bayesian inference ... A common experiment is to measure the force dependence of conformational changes at equilibrium. Here, we demonstrate that the ... Optical Fiber Technology (1) Optical Materials (1) Optical Materials Express (4) Optical Memory and Neural Networks (1) Optical ...
  http://opticaltweezers.blogspot.com/2012/10/