Imaging Facility

Super resolution (STED)

Achucarro's Leica TCS STED CW SP8 super-resolution confocal microscope

Our Imaging Unit is equipped with a Leica TCS STED CW SP8 super-resolution microscope. This confocal microscope allows exploring details of samples (in our case, brain tissue), below the limits of diffraction barrier with a purely optical approach, even on living samples in real time. Its technology allows super-resolution optical sections, which can penetrate the samples, and allow the observation of dynamic cellular processes at the nanoscale. It is equipped with a white laser for a more flexible and precise excitation and a super-resolution system (STED extended with Gated STED) that solves structural details in the range of 50-80 nm in samples with double fluorescent labeling.

Main technical specifications

  • Inverted Leica DMI 6000B microscope.
  • Objectives: 10x Air, 20x Air, 40x Oil, 63x Oil, 100x Oil (g-STED).
  • Galvanometric Z-stage and motorized XY-stage for multiposition imaging (mosaic, time lapse).
  • White Light Laser (470-670 nm tunable excitation with 1nm interval).
  • Argon Laser  (458, 476, 488, 496, 514 excitation lines).
  • Ultraviolet Laser (405 nm excitation line, AOTF Flexible)
  • STED CW unit (592 depletion laser for super-resolution and 100x objective)
  • Galvanometric Scanner (up to 1400 Hz) and Resonant Scanner (8000 Hz) for fast scanning.
  • High-sensitive Hybrid detectors (x2) and  standard Photomultiplier tubes (PMT) (x2): 4 channel simultaneous acquisition with freely adjustable spectral detection.
  • Environmental control chamber (temperature, CO2, humidity) for in vivo imaging.

Policy of Use and fees of Leica TCS STED CW SP8 microscope.

Two-Photon microscope

Two-photon microscope Femtonics 2D galvo (2017)

The Femto-2D microscope allows fluorescence imaging of neurons in living brain slices and in vivo. In addition to imaging live cell morphologies, it can be used for calcium imaging and other functional fluorescence microscopy approaches. The setup is based on a tunable femtosecond laser equipped with a DeepSee module to compensate pulse dispersion and facilitate imaging deeper inside tissue. GaAsP and PMT detectors, respectively, allows for dual color imaging. The upright microscope is additionally fitted with electrophysiology equipment for two channel field or whole-cell recordings, as well as an LED epifluorescence module..

Main technical specifications

  • Can be configured for in vivo or in vitro studies
  • Two channel fluorescence detection
  • High precision galvanometric scanning
  • MaiTai 690 – 1040 nm tunable femtosecond excitation laser
  • DeepSee pulse dispersion compensation
  • Fully equipped for patch-clamp electrophysiology
  • Two color LED epifluorescence

ApoTome2™

Achucarro's Zeiss ApoTome2

We have a Carl Zeiss ApoTome2 equipment for creating optical sections of fluorescent samples (free of scattered light). The structured illumination of this equipment projects a grid structure into the focal plane of the specimen, and then moves it into three positions using a scanning mechanism.

Main technical specifications

  • Automatic grid selection for optimum contrast with each objective (2.5 – Dry 10 - Dry 20 – Dry 40 - Dry 40 – Oil 65 - Oil)
  • Freely selectable grid, depending on the specimen
  • Combination of multiple contrast techniques: Fluorescence channels (DAPI, GFP, DsRed), brightfield, darkfield, DIC, polarized light.
  • Live Cell Imaging and time lapse (with CO2 and temperature control system)
  • Up to three images per second (depending on the exposure time). Doubling of frame rate with "burst mode" (in Live Cell Imaging)

Ultramicrotome (for electron microscopy)

PT-PC PowerTome Ultramicrotome

Our Imaging Facility is equipped with a PC controlled ultramicrotome by RMC Boeckeler, with an integrated touch screen control monitor, that provides good training capabilities. This equipment can take ultra-thin sections to be then studied in the Electronic Microscopy Laboratory, within the Advanced Research Facilities (SGIker) of the University, in the campus.

Main technical specifications

  • Auto thin sectioning from 1nm and Auto thick sectioning to 15µm
  • Cutting speed range from 0.1 – 100mm/sec
  • Specimen auto feed 200µm
  • High precision manually operated knife stage with 30mm lateral and 12mm forward motion
  • Upper knife stage with 360° rotation and knife clearance angle adjustment from -2° to +15°.
  • Accepts glass knives up to 12mm wide, triangular tungsten carbide knives,...
  • Cutting zone set by its control system that can be adjusted at any time.
  • Numeric & digital displays of number of sections cut, total specimen feed advanced, section thickness, cutting speed and specimen feed remaining
  • Stemi 2000 stereomicroscope with 7.7:1 zoom range, 6.5X to 50X magnification with 10X wide field (23mm) eyepieces