Results 21 to 30 of about 250,736 (266)

Two-Photon Imaging

open access: yes, 2022
This chapter will provide an overview of two-photon microscopy from elements of the theory underpinning fluorescence phenomena to functioning principles of a two-photon microscope including step-by-step practical advice on how to conduct an experiment using a two-photon microscope.
Sancataldo G., Barrera O., Vetri V.
openaire   +3 more sources

The cell adhesion molecule Sdk1 shapes assembly of a retinal circuit that detects localized edges

open access: yeseLife, 2021
Nearly 50 different mouse retinal ganglion cell (RGC) types sample the visual scene for distinct features. RGC feature selectivity arises from their synapses with a specific subset of amacrine (AC) and bipolar cell (BC) types, but how RGC dendrites ...
Pierre-Luc Rochon   +3 more
doaj   +1 more source

Two-photon optogenetics [PDF]

open access: yes, 2012
The use of optogenetics, the technology that combines genetic and optical methods to monitor and control the activity of specific cell populations, is now widely adopted in neuroscience. The development of optogenetic tools, such as natural photosensitive ion channels and pumps or calcium- and voltage-sensitive proteins, has been growing tremendously ...
Oron, Dan   +3 more
openaire   +3 more sources

Polarization-controlled anisotropy in hybrid plasmonic nanoparticles

open access: yesNanophotonics, 2022
Anisotropy has played a critical role in many material systems, but its controllable creation and modulation have been a long-lasting challenge for the scientific communities. Polarization-addressed anisotropy appears more attractive among all approaches
Wang Xujie   +7 more
doaj   +1 more source

Two-photon polymerization for 3D biomedical scaffolds: Overview and updates

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
The needs for high-resolution, well-defined and complex 3D microstructures in diverse fields call for the rapid development of novel 3D microfabrication techniques.
Xian Jing   +4 more
doaj   +1 more source

Accurate spike estimation from noisy calcium signals for ultrafast three-dimensional imaging of large neuronal populations in vivo

open access: yesNature Communications, 2016
Two-photon laser scanning microscopy allows functional calcium imaging of large neuronal populations in vivo, but the recorded signals typically suffer from low signal to noise.
Thomas Deneux   +7 more
doaj   +1 more source

A laser–plasma platform for photon–photon physics: the two photon Breit–Wheeler process

open access: yesNew Journal of Physics, 2021
We describe a laser–plasma platform for photon–photon collision experiments to measure fundamental quantum electrodynamic processes. As an example we describe using this platform to attempt to observe the linear Breit–Wheeler process.
B Kettle   +37 more
doaj   +1 more source

Place Cells in Head-Fixed Mice Navigating a Floating Real-World Environment

open access: yesFrontiers in Cellular Neuroscience, 2021
The hippocampal place cell system in rodents has provided a major paradigm for the scientific investigation of memory function and dysfunction. Place cells have been observed in area CA1 of the hippocampus of both freely moving animals, and of head-fixed
Mary Ann Go   +7 more
doaj   +1 more source

Two-photon anti-coalescence interference: The signature of two-photon entanglement [PDF]

open access: yesEurophysics Letters (EPL), 2003
We study a general theory on the interference of two-photon wavepacket in a beam splitter. We find that the symmetry of two-photon spectrum plays an important role in the manners of interference. We distinguish the coalescence and anti-coalescence interferences, and prove that the anti-coalescence interference is the signature of photon entanglement.
Wang, Kaige, Zhu, Shiyao
openaire   +2 more sources

Microglia protect against brain injury and their selective elimination dysregulates neuronal network activity after stroke

open access: yesNature Communications, 2016
How microglia contribute to brain injury or repair is unclear. Here combining microglia manipulations and calcium imaging, the authors show that selective elimination of microglia leads to disrupted neuronal calcium dynamics and markedly increased brain ...
Gergely Szalay   +11 more
doaj   +1 more source

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