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ינואר 01, 2013
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Date:27שלישימרץ 2018הרצאה
Predator induced changes in the desert isopods trophic function
More information שעה 11:30 - 11:30מיקום בניין לביוכימיה על שם נלה וליאון בנוזיומרצה Moshe Zaguri
Risk-Management Ecology Lab., Dept. of Ecology, Evolution and Behavior, The Life Sciences institute, The Hebrew University of Jerusalem, Givat Ram, Jerusalemמארגן המחלקה למדעי הצמח והסביבהדף בית צרו קשר -
Date:27שלישימרץ 2018הרצאה
Visualizing Synapse Formation and Elimination in vivo
More information שעה 12:30 - 12:30מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Elly Nedivi
The Picower Institute for Learning and Memory Dept of Brain and Cognitive Sciences, Massachusetts Institute of Technologyמארגן המחלקה למדעי המוחצרו קשר תקציר Show 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 2018הרצאה
Barcoding evolution
More information שעה 13:00 - 13:00מיקום בניין קמיליה בוטנארמרצה Prof. Dmitri Petrov
Center of Computational, Evolutionary, and Human Genomics, Stanford University, USAמארגן המחלקה לגנטיקה מולקולריתצרו קשר -
Date:27שלישימרץ 2018הרצאה
"Myosin 19 is enzymatically adapted to transport Mitochondria “
More information שעה 14:00 - 15:00מיקום בניין הלן ומילטון קימלמןמרצה Prof. Arnon Henn מארגן המחלקה לביולוגיה מבנית וכימיתצרו קשר -
Date:28רביעימרץ 2018הרצאה
Multi-Coil Magnetic Field Generation
More information שעה 09:30 - 09:30מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Robin de Graaf
Yale School of Medicineמארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר -
Date:28רביעימרץ 2018הרצאה
Controlling Nucleic-Acid-Based Processes by Light
More information שעה 10:00 - 11:00מיקום בניין לביוכימיה על שם נלה וליאון בנוזיומארגן המחלקה למדעים ביומולקולרייםצרו קשר תקציר Show 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 2018הרצאה
New insights into complex excited-state phenomena in energy materials from predictive computational approaches
More information שעה 11:00 - 12:00מיקום בניין פרלמן למדעי הכימיהמרצה Prof. Sivan Refaely-Abramson
Dept. Physics, University of California at Berkeleyמארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר -
Date:29חמישימרץ 2018סימפוזיונים
Physics Colloquium
More information שעה 11:15 - 12:30מיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה TBA מארגן הפקולטה לפיזיקהצרו קשר תקציר Show full text abstract about TBA ...» TBA -
Date:29חמישימרץ 2018הרצאה
Clinical & Future Directions for Treatments of Prevalent Cancer Types - LUNG CANCER
More information שעה 11:15 - 13:00מיקום בניין ע"ש מקס ולילאן קנדיוטימרצה Prof. Jair Bar
SHEBA Medical Centerמארגן בית הספר למחקר - מכון ויצמן למדעצרו קשר -
Date:08ראשוןאפריל 201811רביעיאפריל 2018כנסים
EMBO workshop on Noncoding RNAs in Development and Cell Differentiation
More information שעה 08:00 - 08:00מיקום מרכז כנסים על-שם דויד לופאטייושב ראש Igor Ulitskyדף בית -
Date:08ראשוןאפריל 2018הרצאה
Behind the Scenes of Scientific Publishing at EMBO
More information שעה 10:00 - 11:00מיקום בניין ע"ש מקס ולילאן קנדיוטימרצה Dr. Anne Nielsen מארגן המחלקה לאימונולוגיה ורגנרציה ביולוגיתצרו קשר תקציר Show 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. -
Date:08ראשוןאפריל 2018הרצאה
From kB to kB: Universal and efficient entropy estimation using a compression algorithm
More information שעה 11:00 - 12:00מיקום בניין פרלמן למדעי הכימיהמרצה Prof. Roy Beck
School of Physics and Astronomy, TAUמארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר תקציר Show 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. -
Date:08ראשוןאפריל 2018הרצאה
Molecular Genetics Departmental Seminars 2017-2018
More information שעה 13:00 - 13:00כותרת Adaptive evolution of noise-buffering through transcription-factor duplicationמיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Michal Chapal מארגן המחלקה לגנטיקה מולקולריתצרו קשר -
Date:08ראשוןאפריל 2018הרצאה
Islet 3D chromatin architecture provides insights into personalized medicine for type 2 diabetes
More information שעה 15:00 - 16:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Prof. Jorge Ferrer
Department of Medicine, Imperial College London, UKצרו קשר -
Date:09שניאפריל 2018סימפוזיונים
"Inorganic nanotubes and fullerene-like nanoparticles at the crossroad between materials science and nanotechnology and their applications"
More information שעה 11:00 - 12:15מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Reshef Tenne
Department of Materials and Interfaces, WISמארגן הפקולטה לכימיהצרו קשר תקציר Show 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. -
Date:09שניאפריל 2018הרצאה
Neural circuits for defensive responses
More information שעה 12:45 - 12:45מיקום בניין לחקר המוח על-שם נלה וליאון בנוזיומרצה Dr. Philip Tovote
Institute of Clinical Neurobiology, Wurzburg University, Germanyמארגן המחלקה למדעי המוחצרו קשר תקציר Show 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 2018הרצאה
Cell Penetration and Membrane Fusion: Two Sides of the Same Coin
More information שעה 10:00 - 11:00מיקום בניין לביוכימיה על שם נלה וליאון בנוזיומרצה Prof. Pavel Jungwirth
Institute of Organic Chemistry and Biochemistry of the CASמארגן המחלקה למדעים ביומולקולרייםצרו קשר תקציר Show 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 2018הרצאה
Cyclodextrin Complexation: From Solution-State Complexes to Paper-Based Devices
More information שעה 11:00 - 12:00מיקום בניין הלן ומילטון קימלמןמרצה Prof. Mindy Levine
University of Rhode Islandמארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר -
Date:10שלישיאפריל 2018הרצאה
SEMINAR CANCELLED: Foraminifera as bioindicators of marine environments
More information שעה 11:30 - 11:30מרצה Prof. Sigal Abramovich
Department of Geological and Environmental Sciences, Ben Gurion University of the Negev, Beer Shevaמארגן המחלקה למדעי הצמח והסביבהצרו קשר -
Date:10שלישיאפריל 2018הרצאה
פרופ' אהוד דוכובני - מהגדול ביותר לקטן ביותר - מה מלמד המאיץ הגדול שב"סרן" על מבנה החומר?
More information שעה 12:00 - 12:00כותרת מהגדול ביותר לקטן ביותר - מה מלמד המאיץ הגדול שב"סרן" על מבנה החומר?מיקום אולם ע"ש דולפי ולולה אבנרמרצה Prof. Ehud Duchovni מארגן המחלקה לתקשורת ודוברותדף בית צרו קשר
