Applications of an Inverted Fluorescence Microscope: Helping the Field of Life Sciences
Because inverted microscopes are modular designed, they can be conveniently configured for different applications of an inverted microscope such as the following:
-In vitro fertilization
-High-resolution DIC
-Observations that are video enhanced
-Other advanced techniques on fluorescence
-Micromanipulation
They can also be easily manipulated for multiphoton as well as confocal microscopy.
Accessories may also include filter wheels, focus drives, revolving nosepieces, shutters, fluorescence block turrets, as well as condensers.
Fluorescence Investigations of Tissues and Living Cells
When inverted microscopes are paired with water immersion, phase contrast, ultraviolet excitation as well as highly advanced objectives for a long working distance, they become excellent instruments in fluorescence investigations and experiments on living tissues and cells.
Conducting Investigations on Embyronic Stem Cells
Found in the human blastocysts as well as in other mammals are the cells that are normally converted into lines of embryonic stem cells. They are now widely used by numerous research laboratories. They are more adept to standard in vitro culture. During subculture, the cell lines can maintain their nuclei and their undifferentiated condition. However, they are still capable of forms of differentiation into almost every type of tissue.
Embryonic stem cells that are reproduced initially become stem cells like hematopoietic stem cells, muscle stem cells, and neuronal stem cells, to name a few. They are then differentiated into muscle cells, neurons, or blood cells. However, embryonic stem cells cannot function as a fertilized egg. You cannot culture, clone, or reproduce it so they can turn into human beings or even other animals.
With regards to embryonic stem cell research, the inverted fluorescence microscope can be used to monitor the culture.
Multiphoton Fluorescence Microscopy
Multiphoton fluorescence is considered to be a very powerful research technique. It makes use of the combination of very specific fluorophores to highly advanced optical mechanisms. The latter utilizes laser scanning microscopy so it can capture 3D high-resolution images of cultures and specimens. Unlike confocal microscopy, multiphoton fluorescence microscopy is far more beneficial if you’re after clearer imaging of tissues and living cells, with 3D rendering of images.
Bioluminiscent and Fluorescent Proteins
Research of GFP (green fluorescent protein) together with other genetic variants has been a favorite when it comes to investigative cell research for the past several years. Moreover, aequorin and luciferase, both bioluminescent proteins, are helpful in recognizing the presence of ATP or adenosine triphosphate as well as any fluctuation in the concentrations of intracellular ions. Special variants of both fluorescent and luminescent proteins are now available commercially. This is paving the way for the probability of conducting simultaneous and repetitive label experiments for living cells. Inverted microscopes make it possible to investigate living tissue specimens that are thick. This is not possible if you are only using standard imaging mechanisms.
Multiphoton and Confocal Microscopy
Because fluorescence makes use of reflected light, you can practically capture the image of opaque samples. Inverted fluorescence microscopes permit for convenient access of the specimen, which is utilized for physiological assessment.
With regards to laser scanning confocal microscopy, a specimen is scanned through the use of a laser beam. The fluorescent light emitted should pass into the pinhole aperture. This is so that fluorescence that is not along the focal plane can be blocked by the pinhole. This will eliminate out-of-focus information. It can also improve background discrimination as well as enhance resolution. In optical sectioning, you can automatically obtain section series and reconstructed them in 2D or 3D imaging.
A more powerful laser is being utilized when it comes to multiphoton microscopy. This is to offer simultaneous excitation of photons with low energy so that it will also excite fluorophore to a similar level as a single photon with high energy. The utilization of red wavelengths (low energy) can reduce specimen damage, which is considered to be very vital in preserving living tissue. The lower energy wavelengths can also go deeper into any kind of tissue. Excitation through multiphoton technique can only happen when the focal plane as well as the tissue will not be affected and that there’s no need to use pinhole apertures.
Thermal and Structural Stability of Inverted Microscopes
Like upright microscopes, frames of contemporary inverted microscopes are fabricated with the use of composite materials and are computer engineered. This is to provide thermal and structural stability.
Additionally, in the applications of an inverted fluorescence microscope, the components of the mechanical stage and their circuit structures are developed with high rigidity and short travel distances. This is to avoid any yawning and pitching of the microscope when you manipulate the nosepiece for routine operations like objective correction collar adjustments as well as insertion of DIC prisms.