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ינואר 01, 2013

  • Date:27שלישימרץ 2018

    Predator induced changes in the desert isopods trophic function

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    שעה
    11:30 - 11:30
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    מרצהMoshe Zaguri
    Risk-Management Ecology Lab., Dept. of Ecology, Evolution and Behavior, The Life Sciences institute, The Hebrew University of Jerusalem, Givat Ram, Jerusalem
    מארגן
    המחלקה למדעי הצמח והסביבה
    דף בית
    צרו קשר
    הרצאה
  • Date:27שלישימרץ 2018

    Visualizing Synapse Formation and Elimination in vivo

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    שעה
    12:30 - 12:30
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצהProf. Elly Nedivi
    The Picower Institute for Learning and Memory Dept of Brain and Cognitive Sciences, Massachusetts Institute of Technology
    מארגן
    המחלקה למדעי המוח
    צרו קשר
    תקצירShow full text abstract about The introduction of two-photon microscopy for in vivo imagin...»
    The introduction of two-photon microscopy for in vivo imaging has opened the door to chronic monitoring of individual neurons in the adult brain and the study of structural plasticity mechanisms at a very fine scale. Perhaps the biggest contribution of this modern anatomical method has been the discovery that even across the stable excitatory dendritic scaffold there is significant capacity for synaptic remodeling, and that synaptic structural rearrangements are a key mechanism mediating neural circuit adaptation and behavioral plasticity in the adult. To monitor the extent and nature of excitatory and inhibitory synapse dynamics on individual L2/3 pyramidal neurons in mouse visual cortex in vivo, we labeled these neurons with a fluorescent cell fill as well as the fluorescently tagged synaptic scaffolding molecules, Teal-Gephyrin to label inhibitory synapses, and mCherry-PSD-95 to label excitatory synapses. We simultaneously tracked the daily dynamics of both synapse types using spectrally resolved two-photon microscopy. We found that aside from the lower magnitude of excitatory synaptic changes in the adult, as compared to inhibitory ones, excitatory synapse dynamics appear to follow a different logic than inhibitory dynamics. While excitatory dynamics seem to follow a sampling strategy to search for and create connections with new presynaptic partners, inhibitory synapse dynamics likely serve to locally modulate gain at specific cellular locales.

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  • Date:27שלישימרץ 2018

    Barcoding evolution

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    שעה
    13:00 - 13:00
    מיקום
    בניין קמיליה בוטנאר
    מרצהProf. Dmitri Petrov
    Center of Computational, Evolutionary, and Human Genomics, Stanford University, USA
    מארגן
    המחלקה לגנטיקה מולקולרית
    צרו קשר
    הרצאה
  • Date:27שלישימרץ 2018

    "Myosin 19 is enzymatically adapted to transport Mitochondria “

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    שעה
    14:00 - 15:00
    מיקום
    בניין הלן ומילטון קימלמן
    מרצהProf. Arnon Henn
    מארגן
    המחלקה לביולוגיה מבנית וכימית
    צרו קשר
    הרצאה
  • Date:28רביעימרץ 2018

    Multi-Coil Magnetic Field Generation

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    שעה
    09:30 - 09:30
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצהProf. Robin de Graaf
    Yale School of Medicine
    מארגן
    המחלקה לכימיה מולקולרית ולמדע חומרים
    צרו קשר
    הרצאה
  • Date:28רביעימרץ 2018

    Controlling Nucleic-Acid-Based Processes by Light

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    שעה
    10:00 - 11:00
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    מארגן
    המחלקה למדעים ביומולקולריים
    צרו קשר
    תקצירShow full text abstract about Sensory photoreceptor proteins underpin sensation of inciden...»
    Sensory photoreceptor proteins underpin sensation of incident light and mediate numerous organismal adaptations of behavior, lifestyle and physiology. Photoreceptors excel in the reversibility, noninvasiveness and spatiotemporal precision of the biological responses they elicit. For exactly these benefits, photoreceptors have found frequent use as light-gated actuators for the control by light of intracellular processes and parameters, an application area known as optogenetics. The engineering of novel photoreceptors, that is, protein actuators with custom-tailored light-gated function, has greatly expanded the repertoire provided by natural photoreceptors and has thereby unlocked additional areas for optogenetic intervention. By recombining blue-light-sensitive light-oxygen-voltage (LOV) photosensor modules with effector modules of desired output activity, we have generated several implements for the optogenetic control of nucleic-acid-based biological processes, e.g., endonuclease cleavage and gene expression. Biochemical analyses of structure, function and signaling mechanism of sensory photoreceptors unravel the molecular bases for light-dependent allostery and inform the engineering of additional representatives.
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  • Date:28רביעימרץ 2018

    New insights into complex excited-state phenomena in energy materials from predictive computational approaches

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    שעה
    11:00 - 12:00
    מיקום
    בניין פרלמן למדעי הכימיה
    מרצהProf. Sivan Refaely-Abramson
    Dept. Physics, University of California at Berkeley
    מארגן
    המחלקה לכימיה מולקולרית ולמדע חומרים
    צרו קשר
    הרצאה
  • Date:29חמישימרץ 2018

    Physics Colloquium

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    שעה
    11:15 - 12:30
    מיקום
    בניין הפיזיקה ע"ש עדנה וק.ב. וייסמן
    מרצהTBA
    מארגן
    הפקולטה לפיזיקה
    צרו קשר
    תקצירShow full text abstract about TBA ...»
    TBA
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  • Date:29חמישימרץ 2018

    Clinical & Future Directions for Treatments of Prevalent Cancer Types - LUNG CANCER

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    שעה
    11:15 - 13:00
    מיקום
    בניין ע"ש מקס ולילאן קנדיוטי
    מרצהProf. Jair Bar
    SHEBA Medical Center
    מארגן
    בית הספר למחקר - מכון ויצמן למדע
    צרו קשר
    הרצאה
  • Date:08ראשוןאפריל 201811רביעיאפריל 2018

    EMBO workshop on Noncoding RNAs in Development and Cell Differentiation

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    שעה
    08:00 - 08:00
    מיקום
    מרכז כנסים על-שם דויד לופאטי
    יושב ראש
    Igor Ulitsky
    דף בית
    כנסים
  • Date:08ראשוןאפריל 2018

    Behind the Scenes of Scientific Publishing at EMBO

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    שעה
    10:00 - 11:00
    מיקום
    בניין ע"ש מקס ולילאן קנדיוטי
    מרצהDr. Anne Nielsen
    מארגן
    המחלקה לאימונולוגיה ורגנרציה ביולוגית
    צרו קשר
    תקצירShow full text abstract about Publishing research papers is a cornerstone of working in li...»
    Publishing research papers is a cornerstone of working in life sciences, but do you know what actually happens to your manuscript once it is submitted to a scientific journal? Anne Nielsen – scientific editor for The EMBO journal – will take you behind the scenes of scientific publishing at EMBO and explain how editors make decisions, find referees and work with authors to improve the revised manuscript. She will also discuss some of the challenges faced by the current publishing landscape, talk about the efforts EMBO is making to prevent errors and fraud from entering the literature, and offer advice on manuscript writing and submission.
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  • Date:08ראשוןאפריל 2018

    From kB to kB: Universal and efficient entropy estimation using a compression algorithm

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    שעה
    11:00 - 12:00
    מיקום
    בניין פרלמן למדעי הכימיה
    מרצהProf. Roy Beck
    School of Physics and Astronomy, TAU
    מארגן
    המחלקה לכימיה מולקולרית ולמדע חומרים
    צרו קשר
    תקצירShow full text abstract about Entropy and free-energy estimation are key in thermodynamic ...»
    Entropy and free-energy estimation are key in thermodynamic characterization of simulated systems ranging from spin models through polymers, colloids, protein structure, and drug-design. Current techniques suffer from being model specific, requiring abundant computation resources and simulation at conditions far from the studied realization. In this talk, I will present a novel universal scheme to calculate entropy using lossless compression algorithms and validate it on simulated systems of increasing complexity. Our results show accurate entropy values compared to benchmark calculations while being computationally effective. In molecular-dynamics simulations of protein folding, we exhibit unmatched detection capability of the folded states by measuring previously undetectable entropy fluctuations along the simulation timeline. Such entropy evaluation opens a new window onto the dynamics of complex systems and allows efficient free-energy calculations.
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  • Date:08ראשוןאפריל 2018

    Molecular Genetics Departmental Seminars 2017-2018

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    שעה
    13:00 - 13:00
    כותרת
    Adaptive evolution of noise-buffering through transcription-factor duplication
    מיקום
    בניין ארתור ורושל בלפר למחקר ביורפואי
    מרצהMichal Chapal
    מארגן
    המחלקה לגנטיקה מולקולרית
    צרו קשר
    הרצאה
  • Date:08ראשוןאפריל 2018

    Islet 3D chromatin architecture provides insights into personalized medicine for type 2 diabetes

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    שעה
    15:00 - 16:00
    מיקום
    בניין ארתור ורושל בלפר למחקר ביורפואי
    מרצהProf. Jorge Ferrer
    Department of Medicine, Imperial College London, UK
    צרו קשר
    הרצאה
  • Date:09שניאפריל 2018

    "Inorganic nanotubes and fullerene-like nanoparticles at the crossroad between materials science and nanotechnology and their applications"

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    שעה
    11:00 - 12:15
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצהProf. Reshef Tenne
    Department of Materials and Interfaces, WIS
    מארגן
    הפקולטה לכימיה
    צרו קשר
    תקצירShow full text abstract about After almost 100 years of research inorganic layered (2D) ma...»
    After almost 100 years of research inorganic layered (2D) materials, like MoS2, are currently used as catalysts, lubricants, and perhaps most importantly in rechargeable Li- ion batteries. After a short briefing on the history of 2D materials research,1 the concepts which lead to the first synthesis of hollow-cage nanostructures, including nanotubes (INT) and fullerene-like (IF) nanoparticles from 2D compounds, will be presented. The progress with the high-temperature synthesis and characterization of new inorganic nanotubes (INT) and fullerene-like (IF) nanoparticles (NP) will be presented. In particular, the synthesis and structure of nanotubes from the ternary “misfit” layered compounds (MLC), like LnS-TaS2 (Ln= La, Ce, Gd, Ho, Er), CaCoO-CoO2 and numerous other MLC were elucidated. More recently nanotubes (and nanoscrolls) from quaternary MLC were reported.
    Major progress has been achieved in elucidating the structure of INT and IF using advanced microscopy techniques, like aberration corrected TEM and related techniques. Mechanical, electrical and optical measurements of individual WS2 nanotubes reveal their unique quasi-1D characteristics. This analysis demonstrate their different behavior compared to the bulk phase. Applications of the IF/INT as superior solid lubricants and for reinforcement of variety of polymers and light metal alloys was demonstrated. Few recent studies indicate that this brand of nanoparticles is less toxic than most nanoparticles. With expanding product lines, manufacturing and sales, these nanomaterials are gradually becoming an industrial commodity.
    1. L. Panchakarla, B. Visic and R. Tenne, “Perspective”, J. Am. Chem. Soc. 2017, 139, 12865-12878.
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  • Date:09שניאפריל 2018

    Neural circuits for defensive responses

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    שעה
    12:45 - 12:45
    מיקום
    בניין לחקר המוח על-שם נלה וליאון בנוזיו
    מרצהDr. Philip Tovote
    Institute of Clinical Neurobiology, Wurzburg University, Germany
    מארגן
    המחלקה למדעי המוח
    צרו קשר
    תקצירShow full text abstract about Behavioral responses to threat encompass evolutionarily cons...»
    Behavioral responses to threat encompass evolutionarily conserved active or passive defensive motor responses, such as flight and freezing, respectively. Brain-wide distributed neural circuits mediate top-down control of the defense reaction and interact with ascending pathways that transmit interoceptive information from the periphery. Defensive action selection has been modelled around the concept of threat imminence, but the circuit mechanisms mediating different defensive behaviors and the switch between them remain unclear.
    The seminar will present a circuit-centered systems neuroscience approach to characterize the neural circuits for defensive responses with a focus on the central nucleus of the amygdala (CEA) and midbrain periaqueductal grey (PAG), whose output selection is mediated by integration of local microcircuit interactions and external inputs. Our findings demonstrate that defensive action selection is a cue- and context dependent, multi-site process involving complex functional motifs within evolutionary old, mammalian “survival circuits”.
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  • Date:10שלישיאפריל 2018

    Cell Penetration and Membrane Fusion: Two Sides of the Same Coin

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    שעה
    10:00 - 11:00
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    מרצהProf. Pavel Jungwirth
    Institute of Organic Chemistry and Biochemistry of the CAS
    מארגן
    המחלקה למדעים ביומולקולריים
    צרו קשר
    תקצירShow full text abstract about Cell penetrating peptides have a unique potential for target...»
    Cell penetrating peptides have a unique potential for targeted drug delivery, therefore, mechanistic understanding of their membrane action has been sought since their discovery over 20 years ago. While ATP-driven endocytosis is known to play a major role in their internalization, there has been also ample evidence for the importance of passive translocation for which the direct mechanism, where the peptide is thought to directly pass through the membrane via a temporary pore, has been widely advocated. In this talk, I will question this view and demonstrate that arginine-rich cell penetrating peptides can instead enter vesicles and cells by inducing multilamellarity and fusion, analogously to the action of calcium ions. The molecular picture of this penetration mode, which differs qualitatively from the previously proposed direct mechanism, is provided by molecular dynamics simulations. In addition, the kinetics of vesicle agglomeration and fusion by nonaarginine, nonalysine, and calcium ions are documented in real time by fluorescence techniques and the induction of multilamellar phases in vesicles and cells is revealed both via electron microscopy and fluorescence spectroscopy. We thus show that the newly identified passive cell penetration mechanism is analoguous to vesicle fusion induced by calcium ions, demonstrating that the two processes are of a common mechanistic origin.



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  • Date:10שלישיאפריל 2018

    Cyclodextrin Complexation: From Solution-State Complexes to Paper-Based Devices

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    שעה
    11:00 - 12:00
    מיקום
    בניין הלן ומילטון קימלמן
    מרצהProf. Mindy Levine
    University of Rhode Island
    מארגן
    המחלקה לכימיה מולקולרית ולמדע חומרים
    צרו קשר
    הרצאה
  • Date:10שלישיאפריל 2018

    SEMINAR CANCELLED: Foraminifera as bioindicators of marine environments

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    שעה
    11:30 - 11:30
    מרצהProf. Sigal Abramovich
    Department of Geological and Environmental Sciences, Ben Gurion University of the Negev, Beer Sheva
    מארגן
    המחלקה למדעי הצמח והסביבה
    צרו קשר
    הרצאה
  • Date:10שלישיאפריל 2018

    פרופ' אהוד דוכובני - מהגדול ביותר לקטן ביותר - מה מלמד המאיץ הגדול שב"סרן" על מבנה החומר?

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    שעה
    12:00 - 12:00
    כותרת
    מהגדול ביותר לקטן ביותר - מה מלמד המאיץ הגדול שב"סרן" על מבנה החומר?
    מיקום
    אולם ע"ש דולפי ולולה אבנר
    מרצהProf. Ehud Duchovni
    מארגן
    המחלקה לתקשורת ודוברות
    דף בית
    צרו קשר
    הרצאה

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