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October 01, 2009
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Date:05SundayJune 2011Lecture
Review of recent results from the Kepler Mission: the quest to discover another Earth
More information Time 12:30 - 12:30Location Edna and K.B. Weissman Building of Physical SciencesLecturer Avi Shporer
UCSB/LCOGTOrganizer Nella and Leon Benoziyo Center for AstrophysicsContact Abstract Show 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. -
Date:05SundayJune 2011Lecture
Astrophysics Seminar
More information Time 12:30 - 14:00Location Dannie N. Heineman LaboratoryLecturer Dr. Avi Shporer Organizer Nella and Leon Benoziyo Center for AstrophysicsContact -
Date:05SundayJune 2011Lecture
Compartmentalized Activation of Caspases During Spermatogenesis
More information Time 13:00 - 13:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Lior Aram
Eli Arama's group Dept. of Molecular Genetics, WISOrganizer Department of Molecular GeneticsContact -
Date:05SundayJune 2011Lecture
"Photoinduced Structural Relaxation and Electron Transfer in Rhenium-Labeled Azurins"
More information Time 15:00 - 15:00Location 404Lecturer Professor Dr. A. Vlcek, Jr. Organizer Department of Chemical and Biological PhysicsContact -
Date:05SundayJune 2011Lecture
Surface Characterization of Functionalized Nanoparticles
More information Time 16:30 - 17:30Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. David G. Castner
Depts. of Bioengineering & Chemical Engineering, University of Washington, SeattleOrganizer Faculty of ChemistryContact Abstract Show 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.
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Date:06MondayJune 2011Lecture
Personalized Biomarkers: Moving from Discovery to Potential Clinical Applications
More information Time 10:00 - 10:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Charles R. Cantor
Chief Scientific Officer SEQUENOM, Inc. San Diego, CA USAHomepage Contact Abstract Show 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.
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Date:06MondayJune 2011Lecture
"From Sensing to Logic to Therapy: Towards Unimolecular Theranostics"
More information Time 11:00 - 11:00Title Department of Organic Chemistry - a special departmental seminarLocation Helen and Milton A. Kimmelman BuildingLecturer Prof. Engin Umut Akkaya
Department of Chemistry & UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, TurkeyOrganizer Department of Molecular Chemistry and Materials ScienceContact Abstract Show 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.
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Date:06MondayJune 2011Lecture
Image Classification with Invariant Representations
More information Time 13:00 - 13:00Location Ziskind Bldg.Lecturer Stephane Mallat
CMAP, Ecole PolytechniqueOrganizer Faculty of Mathematics and Computer Science -
Date:06MondayJune 2011Lecture
Determinant and Permanent
More information Time 14:30 - 14:30Location Ziskind Bldg.Lecturer Avi Wigderson
Institute for Advanced StudyOrganizer Faculty of Mathematics and Computer Science -
Date:06MondayJune 2011Lecture
Meetings at the Frontiers of Science
More information Time 19:15 - 19:15Organizer Science for All UnitHomepage Contact -
Date:09ThursdayJune 2011Lecture
TBA
More information Time 11:15 - 12:30Location Edna and K.B. Weissman Building of Physical SciencesLecturer Ehud Behar
TechnionOrganizer Faculty of PhysicsContact -
Date:09ThursdayJune 2011Colloquia
X-Ray Absorption: Where What We Do Not See Matters
More information Time 11:15 - 12:30Location Edna and K.B. Weissman Building of Physical SciencesLecturer Ehud Behar
TechnionOrganizer Faculty of PhysicsContact Abstract Show 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.
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Date:09ThursdayJune 2011Lecture
Functional Imaging of Nanowires
More information Time 15:00 - 15:00Location Perlman Chemical Sciences BuildingLecturer Prof. Lincoln J. Lauhon
Department of Materials Science and Engineering, Northwestern University, Evanston, ILOrganizer Department of Molecular Chemistry and Materials ScienceContact -
Date:10FridayJune 2011Lecture
Vascular club
More information Time 10:00 - 12:30Location Max and Lillian Candiotty BuildingContact -
Date:12SundayJune 2011Lecture
Semi-Supervised Learning in Gigantic Image Collection
More information Time 11:00 - 11:00Location Ziskind Bldg.Lecturer Yair Weiss
The Hebrew University of JerusalemOrganizer Faculty of Mathematics and Computer Science -
Date:12SundayJune 2011Lecture
"Pressure Solution and Stylolites in Carbonate Rocks"
More information Time 11:00 - 11:00Lecturer Leehee Laronne
Environmental Sciences and Energy Research Dept. Weizmann Institute of ScienceOrganizer Department of Earth and Planetary SciencesContact -
Date:12SundayJune 2011Lecture
Journal club - A special discussion on PTF11eon.
More information Time 12:30 - 14:00Title PTF11eon is the new SN on M51, discovered ~10 days ago by PTF and amateur astronomers simultaneously, (more or less).Location Dannie N. Heineman LaboratoryLecturer Prof. Avishay Gal-Yam Organizer Nella and Leon Benoziyo Center for AstrophysicsContact -
Date:12SundayJune 2011Lecture
Light matter interaction: Observable phenomena which can not be predicted by the standard formalism of quantum mechanics.
More information Time 12:30 - 12:30Location Gerhard M.J. Schmidt Lecture HallLecturer Professor Nimrod Moiseyev Organizer Department of Chemical and Biological PhysicsContact Abstract Show 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
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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.
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Date:12SundayJune 2011Lecture
The long and winding road: from NDEL1 to PPT1
More information Time 13:00 - 13:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Michal Segal
Orly Reiner's group, Dept. of Molecular Genetics, WISOrganizer Department of Molecular GeneticsContact -
Date:12SundayJune 2011Lecture
Effective temperature of active systems
More information Time 13:15 - 13:15Title Clore Physics-Biology MeetingsLocation Drory AuditoriumLecturer Prof. Nir Gov
Dept. Chemical PhysicsOrganizer Clore Center for Biological PhysicsContact
