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October 01, 2009

  • Date:05SundayJune 2011

    Review of recent results from the Kepler Mission: the quest to discover another Earth

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    Time
    12:30 - 12:30
    Location
    Edna and K.B. Weissman Building of Physical Sciences
    LecturerAvi Shporer
    UCSB/LCOGT
    Organizer
    Nella and Leon Benoziyo Center for Astrophysics
    Contact
    AbstractShow full text abstract about To date, about 500 extrasolar planets (exoplanets) have been...»
    To date, about 500 extrasolar planets (exoplanets) have been discovered orbiting other stars. Of those some 100 are transiting (eclipsing) their host star, allowing a much more detailed investigation, including the measurement of their radius and mass, and the study of their atmospheres. Most of those exoplanets are gas giants the size of Jupiter. Kepler is an ambitious NASA Discovery mission whose primary goal is to measure the frequency of small, Earth-like planets, orbiting Sun-like stars in their Habitable Zone, where liquid water can exist on the planet's surface. I will
    discuss the exciting new results recently obtained by Kepler, including the detection of about 1,200 transiting planet candidates and 170 multiple
    transiting planet systems.
    Lecture
  • Date:05SundayJune 2011

    Astrophysics Seminar

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    Time
    12:30 - 14:00
    Location
    Dannie N. Heineman Laboratory
    LecturerDr. Avi Shporer
    Organizer
    Nella and Leon Benoziyo Center for Astrophysics
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    Lecture
  • Date:05SundayJune 2011

    Compartmentalized Activation of Caspases During Spermatogenesis

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    Time
    13:00 - 13:00
    Location
    Arthur and Rochelle Belfer Building for Biomedical Research
    LecturerDr. Lior Aram
    Eli Arama's group Dept. of Molecular Genetics, WIS
    Organizer
    Department of Molecular Genetics
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    Lecture
  • Date:05SundayJune 2011

    "Photoinduced Structural Relaxation and Electron Transfer in Rhenium-Labeled Azurins"

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    Time
    15:00 - 15:00
    Location
    404
    LecturerProfessor Dr. A. Vlcek, Jr.
    Organizer
    Department of Chemical and Biological Physics
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    Lecture
  • Date:05SundayJune 2011

    Surface Characterization of Functionalized Nanoparticles

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    Time
    16:30 - 17:30
    Location
    Gerhard M.J. Schmidt Lecture Hall
    LecturerProf. David G. Castner
    Depts. of Bioengineering & Chemical Engineering, University of Washington, Seattle
    Organizer
    Faculty of Chemistry
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    AbstractShow full text abstract about Nanoparticles used in biomedical applications must exhibit w...»
    Nanoparticles used in biomedical applications must exhibit well-controlled surface properties to achieve optimum performance in complex biological or physiological fluids. Thus, there is a real need for development of rigorous and detailed surface analysis methods for the characterization of functionalized nanoparticles. Examples of new methods developed to quantitatively analyze funtionalized gold nanoparticles (AuNPs) and quantum dots (QDs) will be described in this talk.
    The surface chemistries of C16 carboxylic acid terminated self assembled monolayers (COOH-SAMs) on 14nm AuNPs and flat Au surfaces were characterized with XPS, TEM, FTIR and ToF-SIMS. Simulated Electron Spectra for Surface Analysis (SESSA) was used to simulate the experimental XPS results as a function of take-off angle for COOH-SAMs on flat-Au surfaces. Quantities such as SAM density, thickness, surface roughness and instrumental parameters were tuned in SESSA to optimize agreement between simulated and experimental XPS compositions for SAMs on flat Au surfaces. Then the SESSA results were used to measure the thicknesses of the COOH-SAMs on the 14nm AuNPs.
    The structure and chemistry of CdSe-based QDs were characterized with XPS, TEM and ToF-SIMS. XPS results showed the QDs had a CdSe core, a CdS intermediate shell and a ZnS outer shell. ToF-SIMS showed the QD surface was covered with a range of different hydrocarbon ligands including octadecylphosphonic acid, trioctylphophine oxide, and stearate. Encapsulation of the QDs with poly(maleic anhydride-alt-1-tetradecene) was also characterized using XPS and ToF-SIMS.
    Lecture
  • Date:06MondayJune 2011

    Personalized Biomarkers: Moving from Discovery to Potential Clinical Applications

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    Time
    10:00 - 10:00
    Location
    Arthur and Rochelle Belfer Building for Biomedical Research
    LecturerDr. Charles R. Cantor
    Chief Scientific Officer SEQUENOM, Inc. San Diego, CA USA
    Homepage
    Contact
    AbstractShow full text abstract about The talk will describe the use of advanced nucleic acid mas...»
    The talk will describe the use of advanced nucleic acid
    mass spectrometry and next-generation DNA sequencing for non-invasive
    prenatal diagnostics. This will encompass the analysis
    of maternal plasma for genome-wide genetic and mutational profile of
    the fetus. Also to be described is the use of similar methodologies for
    identifying somatic mutations in cancer. Both mass spectrometry and
    sequencing are powerful and in many ways are complementary. Sequencing
    is best when huge genetic marker sets are needed for problems of
    relatively flat dynamic range. Mass spectrometry is best when extreme
    sensitivity or quantitative precision are required for moderate-sized
    sets of biomarkers.

    BIO: Charles Cantor, member of the US National Academy of Sciences, is
    one of the early pioneers of the world genome project, and a founder of
    SEQUENOM inc. and several other biotech companies. He is professor
    emeritus at Boston University, adjunct professor at UCSD, Scripps and UC
    Irvine, and was director of the Human Genome Center at Lawrence Berkeley
    Laboratory. Cantor has 450 peer-reviewed articles and 60 patents,
    co-author of a renown textbook on Biophysical Chemistry and of the first
    textbook on Genomics.
    Lecture
  • Date:06MondayJune 2011

    "From Sensing to Logic to Therapy: Towards Unimolecular Theranostics"

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    Time
    11:00 - 11:00
    Title
    Department of Organic Chemistry - a special departmental seminar
    Location
    Helen and Milton A. Kimmelman Building
    LecturerProf. Engin Umut Akkaya
    Department of Chemistry & UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Turkey
    Organizer
    Department of Molecular Chemistry and Materials Science
    Contact
    AbstractShow full text abstract about Photodynamic therapy (PDT) is a non-invasive methodology whi...»
    Photodynamic therapy (PDT) is a non-invasive methodology which show promise in the treatment of various cancers and other problems such as macular degeneration. The current practice of PDT is essentially built around porphyrin derivatives and their biological precursors; however, it is also widely acknowledged that they are not ideal photosensitizers for this purpose. As a consequence, development of novel sensitizers for PDT is an active field of research. While exploring potential applications of a versatile group of chromophores known as Bodipy dyes, five years ago, we found out that these compounds can be transformed into sensitizers with good PDT potential.[1] Our later work focused on the modulation of photodynamic effect by making use of unique opportunities offered by “Bodipy chemistry”. One approach was to marry molecular logic gate idea[2,3] with singlet oxygen generation in order to achieve autonomous control of PDT action. Proof of principle for this regulation was reported two years ago.[4] In the last few years, supported by computational studies, we targeted rational design of novel sensitizers and chemical activation these sensitizers through energy transfer which would eliminate the need for external light sources for excitation. Our most recent motivation is bringing together sensing and therapeutic action on a single molecule; i.e., (uni)molecular theranostics. These results will be presented in relation our final goals.





    REFERENCES

    [1] Atilgan, S.; Dost, Z.; Dogan, A. L.; Guc, Akkaya, E.U. Chem. Commun. 2006, 4398-4400.
    [2] Coskun, A.; Deniz, E.; Akkaya, E.U. Org. Lett., 2005, 7, 5187-5189.
    [3] Bozdemir, O.A.; Guliyev, R.; Buyukcakir, O.; Selcuk, S.; Kolemen, S.; Gulseren, G.; Nalbantoglu, T.; Boyaci, H.; Akkaya, E.U.; J. Am. Chem. Soc. 2010, 132, 8029-8036.
    [4] Ozlem, S.; Akkaya, E.U. J. Am. Chem. Soc. 2009, 131, 48-49.

    Lecture
  • Date:06MondayJune 2011

    Image Classification with Invariant Representations

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    Time
    13:00 - 13:00
    Location
    Ziskind Bldg.
    LecturerStephane Mallat
    CMAP, Ecole Polytechnique
    Organizer
    Faculty of Mathematics and Computer Science
    Lecture
  • Date:06MondayJune 2011

    Determinant and Permanent

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    Time
    14:30 - 14:30
    Location
    Ziskind Bldg.
    LecturerAvi Wigderson
    Institute for Advanced Study
    Organizer
    Faculty of Mathematics and Computer Science
    Lecture
  • Date:06MondayJune 2011

    Meetings at the Frontiers of Science

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    Time
    19:15 - 19:15
    Organizer
    Science for All Unit
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    Lecture
  • Date:09ThursdayJune 2011

    TBA

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    Time
    11:15 - 12:30
    Location
    Edna and K.B. Weissman Building of Physical Sciences
    LecturerEhud Behar
    Technion
    Organizer
    Faculty of Physics
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    Lecture
  • Date:09ThursdayJune 2011

    X-Ray Absorption: Where What We Do Not See Matters

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    Time
    11:15 - 12:30
    Location
    Edna and K.B. Weissman Building of Physical Sciences
    LecturerEhud Behar
    Technion
    Organizer
    Faculty of Physics
    Contact
    AbstractShow full text abstract about The talk will explain various measurements of X-ray absorpti...»
    The talk will explain various measurements of X-ray absorption of astrophysical sources and the immense challenge to physically characterize the intervening matter.
    Only 10% of the baryons of the local Universe reside in galaxies, while 90% are conjectured to occupy the intergalactic medium in a form that makes it impossible to detect their electromagnetic emission.
    It will be shown how recent measurements of photo-electric absorption of the farthest known X-ray point sources, namely gamma-ray bursts and quasars, can account for the long sought baryons.
    Since X-ray absorption requires heavy elements (Z > 5), massive galactic winds are invoked to explain how these elements reached intergalactic space.
    The utilization of high-resolution atomic spectroscopy for estimating the mass flow in galactic winds emanating from around supermassive black holes will be demonstrated.
    Colloquia
  • Date:09ThursdayJune 2011

    Functional Imaging of Nanowires

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    Time
    15:00 - 15:00
    Location
    Perlman Chemical Sciences Building
    LecturerProf. Lincoln J. Lauhon
    Department of Materials Science and Engineering, Northwestern University, Evanston, IL
    Organizer
    Department of Molecular Chemistry and Materials Science
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    Lecture
  • Date:10FridayJune 2011

    Vascular club

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    Time
    10:00 - 12:30
    Location
    Max and Lillian Candiotty Building
    Contact
    Lecture
  • Date:12SundayJune 2011

    Semi-Supervised Learning in Gigantic Image Collection

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    Time
    11:00 - 11:00
    Location
    Ziskind Bldg.
    LecturerYair Weiss
    The Hebrew University of Jerusalem
    Organizer
    Faculty of Mathematics and Computer Science
    Lecture
  • Date:12SundayJune 2011

    "Pressure Solution and Stylolites in Carbonate Rocks"

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    Time
    11:00 - 11:00
    LecturerLeehee Laronne
    Environmental Sciences and Energy Research Dept. Weizmann Institute of Science
    Organizer
    Department of Earth and Planetary Sciences
    Contact
    Lecture
  • Date:12SundayJune 2011

    Journal club - A special discussion on PTF11eon.

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    Time
    12:30 - 14:00
    Title
    PTF11eon is the new SN on M51, discovered ~10 days ago by PTF and amateur astronomers simultaneously, (more or less).
    Location
    Dannie N. Heineman Laboratory
    LecturerProf. Avishay Gal-Yam
    Organizer
    Nella and Leon Benoziyo Center for Astrophysics
    Contact
    Lecture
  • Date:12SundayJune 2011

    Light matter interaction: Observable phenomena which can not be predicted by the standard formalism of quantum mechanics.

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    Time
    12:30 - 12:30
    Location
    Gerhard M.J. Schmidt Lecture Hall
    LecturerProfessor Nimrod Moiseyev
    Organizer
    Department of Chemical and Biological Physics
    Contact
    AbstractShow full text abstract about The non-hermitian formalism of quantum mechanics enables one...»
    The non-hermitian formalism of quantum mechanics enables one to solve problems which are extremely hard to solve and often even impossible to solve within the framework of the standard formalism of quantum mechanics.
    It this talk I will focus on a situation where in non-hermitian quantum
    mechanics two eigenvalues and their corresponding eigenfunctions are
    degenerated eigenvalues and states, respectively. We will discuss the effect of
    this "accidental" situation (which cannot happen in the standard formalism of
    quantum mechanics) on different type of observable phenomena.

    We will show how there are observable phenomena that can be predicted by the
    non-hermiitian formalism of quantum mechanics in light matter interactions.
    Either in propagation of light in waveguides or when atoms or molecules or
    nanostructures interact with laser fields.

    References to the CROSSING RULE in non-hermitian QM
    -----------------------------------------------------
    NM and S. Friedland, "The Association of Resonance States with the Incomplete
    Spectrum of Finite Complex-Scaled Hamiltonian Matrices." Phys. Rev. A, 22,
    618-623 (1980).

    E. Narevicius and NM, "Fingerprints of broad overlapping resonances in the e+H2
    cross section." Phys. Rev. Lett., 81, No. 11 (1998);

    E. Narevicius and NM, "Trapping of an electron due to molecular vibrations."
    Phys. Rev. Lett., 84, 1681 (2000).

    E. Narevicius, P. Serra and NM, "Critical phenomena associated with
    self-orthogonality in non_Hermitian quantum mechanics." Europhys. Lett., 62,
    789-794 (2003).

    S. Klaiman, U. Gunther, and NM, "Visualization of Branch Points in PT-Symmetric
    Waveguides, Phys. Rev. Lett. 101, 080402 (2008)

    O. Peleg, M. Segev, G. Bartal, D. N. Christodoulides, and NM, "NonlinearWaves
    in SubwavelengthWaveguide Arrays: Evanescent Bands and the "Phoenix Soliton
    Phys. Rev. Lett. 102, 163902 (2009).

    O. Peleg, Y. Plotnik, NM, O. Cohen, and M. Segev, "Self-trapped leaky waves and
    their interactions",
    Phys. Rev A80, 041801(R) 2009.

    R. Lefebvre, O. Atabek, M. Sindelka, and NM, "Resonance Coalescence in
    Molecular Photodissociation", Phys. Rev. Lett. 103, 123003, (2009).

    B. Alfassi, O. Peleg, NM, and M. Segev
    "Diverging Rabi Oscillations in Subwavelength Photonic Lattices"
    Phys. Rev. Lett. 106, 073901 (2011)

    NM, "Non-Hermitian Quantum Mechanics", Cambridge University Press, 2011.



    Lecture
  • Date:12SundayJune 2011

    The long and winding road: from NDEL1 to PPT1

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    Time
    13:00 - 13:00
    Location
    Arthur and Rochelle Belfer Building for Biomedical Research
    LecturerMichal Segal
    Orly Reiner's group, Dept. of Molecular Genetics, WIS
    Organizer
    Department of Molecular Genetics
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    Lecture
  • Date:12SundayJune 2011

    Effective temperature of active systems

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    Time
    13:15 - 13:15
    Title
    Clore Physics-Biology Meetings
    Location
    Drory Auditorium
    LecturerProf. Nir Gov
    Dept. Chemical Physics
    Organizer
    Clore Center for Biological Physics
    Contact
    Lecture

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