Plant and Animal biology

High resolution and large depth of focus makes SEM a great method for observing topography of biological samples, such as animal and plant fossils, bones, insects, plants and even small animals.
A large variability of TESCAN SEMs can fulfil any customers’ needs regarding the sample size, high resolution imaging, selection of detectors and analytical performance.
  • Our patented unique Wide Field Optics allows scientists to easily switch between different viewing modes depending on the users task.
  • Extra-large objects can be observed at low magnification without distortions in the Wide Field mode. In combination with a 5-axis fully motorized stage, the ideal scene composition can be easily set.
  • Depth mode is tailored to maximize the depth of field at higher magnifications, which is ideal for imaging samples with complex topography, such as surface features on plant leaves.
  • Resolution mode allows zoom-in to the specific details of the samples at high magnification and resolution.
  • Large samples that cannot be coated, such as fossils or rare samples can be observed under variable pressure conditions in the UniVac mode with the LVSTD detector.
Plant and Animal biology
Detail of a soil mite

Related Application Notes

Low temperature scanning electron microscopy for Life Sciences
Low temperature scanning electron microscopy (Cryo-SEM) has become an established technique for capturing and observing biological samples close to their natural state. It is a method of choice, where the traditional sample preparation (e.g. critical point drying) causes unwanted changes in the sample structure. A Cryo-SEM workflow typically involves sample fixation using either flash-freezing in a liquid nitrogen slush or high-pressure freezing. The frozen samples are then transferred under vacuum to a cryo sputter coater, where they are coated with a conductive layer of metals or carbon. Finally, the samples are inserted into a SEM chamber equipped with a cryo-stage and observed in high vacuum environment.
pdf – 4.8 MB
3D Tomography of Zebrafish Embryos Examined with Xe Plasma FIB
Zebrafish (Danio rerio) are a type of freshwater fish that are extremely important to biological research, in particular genetics and diseases. Reasons for their widespread include:
  • They have a similar genetic makeup to humans sharing 70% of their genes
  • 84% of genes associated with human diseases have a zebrafish counterparts
  • Their embryos are almost transparent making it easy to observe the development of internal structures
  • Eggs are fertilised and develop outside the mother’s body making it easy to study early development
  • They have the same major organs and tissues as humans e.g. muscle, blood, kidney and eyes
  • They grow extremely fast, developing as much in a day as a human embryo develops in a month
  • Cheaper to keep than mice
  • Breed prolifically
pdf – 6.1 MB