Applications

Biological Optical Microscopy Platform

The Biological Optical Microscopy Platform provides access to high-end fluorescence microscopy systems with a wide range of possible applications. The glossary below provides a brief description of the applications possible with our technology.

  • Laser Scanning Confocal Microscopy

    Laser scanning confocal microscopy produces very sharp images by excluding out of focus light using an iris in the lightpath known as a pinhole. Images are produced by scanning a laser beam across the sample and collecting emitted light on PMT or GaAsP detectors.

    This technique can be applied on fixed or live samples and when combined with motorised stages can be used to build up large 3D datasets.

    Systems available: Listed here for more info

  • Spinning Disk Confocal Microscopy

    Like the laser scanning confocal microscope this microscope excludes out of focus light using pinholes. However, in the spinning disk confocal microscope there are hundreds of pinholes arranged on a spinning disk.

    This produces key advantages in acquisition speed & reducing photo-toxicity, making spinning disk confocal microscopes ideal for fast and/or long-term imaging experiments.

    Systems Available: Click here for more info

    Nikon Spinning Disk (School of Biosciences)

  • Live Cell Imaging

    We have microscopes equipped with incubation chambers to allow timlaspe recording of live cells/samples. Most instruments are located within PC2 certified facilities enabling experiments on human pathogens such as parasites and viruses.

    Within BOMP, live imaging experiments can be performed on widefield deconvolution, laser scanning confocal, spinning disk confocal, super-resolution and TIRF microscopes.

    Systems available: Click here for more info

    Leica SP5 (Anatomy & Neuroscience)

    Leica SP5 (Bio21 Institute)

    Zeiss LSM700 (Microbiology & Immunology)

    Nikon Spinning Disk (School of Biosciences)

    Deltavision Elite (Biochemistry & Molecular Biology)

    Operetta High Content Imaging (School of Biomedical Sciences)

    OMX Blaze (Bio21 Institute)

  • Super-Resolution Microscopy

    The resolution of standard fluorescence microscopes is limited by the wavelength of light used to image the samples. Super-Resolution Microscopy refers to a group of techniques enable researchers to image beyond this resolution limit by using a number of different methods.

    BOMP has three super-resolution techniques available to researchers:

    1. Structured Illumination Microscopy
    2. Single Molecular Localisation Microscopy
    3. Airyscan Confocal Microscopy

    See individual sections below for more details

  • Structured Illumination Microscopy

    Samples are imaging through an interference pattern, which generates an effect called a Moire fringe. Higher resolution information can then be mathematical extracted and the reconstructed image has a 2-fold increase in resolution in xyz (8x increase in volume resolution).

    System Available: Click here for more info

    OMX Blaze (Bio21 Institute),

  • Single Molecule Localisation Microscopy

    Using special fluorophores it is possible to image emission events from single molecules by ensuring that most of the fluorophores do not emit at the same time. By performing a Gaussian fit to the emission events we can narrow down their positions and use this build up a super-resolution over hundreds of images. This can result in up to a 10-fold increase in resolution in xy.

    Two of the more common localisation microscopy techniques are:

    dSTORM: Uses reducing conditions and strong laser power to turn most of the fluorophores in a  sample into a long lived dark (non-emitting) state.

    PALM: Uses fluorescence proteins that are capable of photo-conversion or photo-switching to produce the blinking effect required.

    System Available: Click here for more info

    OMX Blaze (Bio21 Institute),

  • Airyscan Confocal Microscopy

    This confocal microscopy technique works on the knowledge that narrowing the pinhole can increase your resolution. However, this is not normally performed, as it results in much less light reaching the detectors.

    The Airyscan system gets around this limitation by using a hexagonal array of 32 GaAsP detectors to image as the laser scans across the sample. Each detector is the equivalent of imaging with a pinhole 5 times smaller than normal. The data from all 32 detectors is added together and a linear deconvolution is applied resulting in a 1.7-fold increase in resolution in xyz (5-fold increase in volume resolution). The new Airyscan Fast module enables 4x faster acquisition while providing a 1.5 fold increase in resolution.

    Systems Available: Click here for more info

    Zeiss LSM800 (Anatomy & Neuroscience)

    Zeiss LSM880 (Anatomy & Neuroscience)

  • Multi-Photon Microscopy

    Multi-photon microscope enables researchers to penetrate much deeper (up to 1mm) into samples than standard confocal microscopy. This technique is often used for imaging experiments looking at tissue explants or intra vital experiments (experiments on anaesthitised animals).

    The microscope uses pulses of longer wavelength (>800nm) lasers to produce fluorophore excitation (when two pulses are simultaneously absorbed by the target fluorophore). Due to their longer wavelengths, the excitation light can penetrate deeper and is less damaging to the sample.

    Systems Available: Click here for more info

    Zeiss LSM710 NLO (Microbiology & Immunology)

    Olympus FVMPERS (MIcrobiology & Immunology)

  • Widefield Deconvolution

    Widefield (or epi-fluorescence) microscopes differ from confocal based techniques as they illuminate the entire field of view and capture the resulting emitted light onto a camera. Camera exposures can be very short (ms range) enabling very fast image acquisition.

    Widefield systems lack the pinhole set-up of confocal systems and therefore do not exclude out of focus light. The mathematical process of image deconvolution is able to re-assign out of focus light and results in images with greater contrast & signal to noise.

    Systems Available: Click here for more info

    Deltavision Elite (Biochemistry & Molecular Biology)

    Huygens Remote Manager  (Melbourne Brain Centre) - Online Deconvolution Server

  • High-Content Screening

    Enables fluorescence and brightfield/phase contrast imaging of samples grown in multi-well plate formats (such as 12-well, 96-well, 384 well plates). This enables researchers to perform experiments such as drug or RNAi screen with fluorescent probes for markers such as cell viability.

    This can be combined with timeplapse imaging and automated image analysis to provide quantitative readouts in high-throughput assays.

    Systems Available: Click here for more info

    Perkin Elmer Operetta (School of Biomedical Sciences)

    Molecular Devices ImageXpress (Bio21 Institute)

  • Total Internal Reflection Fluorescence (TIRF)

    Total Internal Reflection Flurescence Microscopy is used mostly to image cell surface, cell cytoskeletal or cytoplasmic compartments. It is also used in some super-resoltuion microscopy techniques, such as PALM or dSTORM.

    This technique produces an evanescent wave that illuminates only the first 100-150nm past the coverslip and therefore is much less phototoxic to the cell than standard widefield or confocal microscopy

    Systems Available: Click here for more info

    Nikon Spinning Disk (School of Biomedical Sciences)

    OMX Blaze (Bio21 Institute)

  • Laser Micro-dissection

    The laser capture microscope uses a UV laser to first microdissect tissue sections and then catapult the dissected piece of tissue into an Eppendorf tube. The collected samples can then be used in Omics analyses such as qPCR, genomics or proteomics.

    The same system is also fitted with an infra-red laser that acts as optical tweezers for the manipulation of single cells and small particles.

    System Available: Click here for more info

    Zeiss PALM (Anatomy & Neuroscience)

  • F-Experiments

    These are a group of quantitative methods that allow researchers to investigate cellular dynamics.

    Fluorescence Recovery After Photobleaching (FRAP): This technique provides a measure of the diffusion or lateral movement of your molecule of interest. The experiment uses a short pulse of intense laser to photobleach a region of interest within a cell. By quantifying the recovery of fluorescence to the region of interest over time researchers can calculate the diffusion rates of their molecules of interest.

    Forster Resonance Energy Transfer (FRET): This technique provides a measure of the proximity of two fluorophores. The experiment requires two specially selected fluorophores, the donor and the acceptor. When the two fluorophores are within 10nm of each other excitation of the donor will result not in emission of the donor, but in the acceptor fluorophore.  Depending of FRET efficiency researchers can measure the interaction between two molecules.

    Systems Available: Click here for more info

    Leica SP5 (Anatomy & Neuroscience)

    Leica SP5 (Biochemistry & Molecular Biology)

  • Image Analysis

    Quantitative analyses of fluorescence images enable researchers to extrapolate extra information from their experiments. Metrics such as fluorescence intensity, area, volume, shape, distance, velocity, colocalisation etc can be fairly easily calculated using either freeware or commercially available packages.

    The platform can provide researchers with access to Imaris, Volocity, Metamorph and FIJI/Image J.

    Systems Available: Click here for more info

    Gold Computer (Anatomy & Neuroscience)

    Green Computer (Anatomy & Neuroscience)

    Analysis Computer (Biochemistry & Molecular Biology)