Month: August 2017

Watch the Webinar On-Demand: Digital Microscopy in Earth Science

Polarized light microscopes have been used in classical earth science studies for the last 100 years. Since then a lot of progress has been made to increase the user friendliness, ergonomy, and optical performance of such microscopes. Still, one thing has not changed: Classical polarized light (compound) microscopes can only be used for prepared samples, …

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Mission Impossible Accomplished: Tunable Colors for Non-descanning Detection

For a single-channel system, this inflexibility was removed by using a spectral device, the spectrometer. The first multi-channel spectrometric device with freely tunable detection channels for confocal microscopes allowing to record images in different colors simultaneously was introduced by Leica Lasertechnik [1] in 1997: the SP-detector. The SP-detector solution for confocal microscopes employs a prism splitting …

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Koehler Illumination: A Brief History and a Practical Set Up in Five Easy Steps

Directly under the stage in an upright microscope (or above the stage but in front of the light source/field diaphragm in an inverted microscope), is the sub-stage condenser (Figure 1). Although it has focus wheels which are similar to the fine/coarse focus of the microscope, this component is used for focusing the light from the …

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Immersion Objectives: Using Oil, Glycerol, or Water to Overcome some of the Limits of Resolution

A less common immersion objective found on research-grade microscopes (and usually confocal microscopes) is the ‘water-immersion’ objective, usually abbreviated as ‘WI’ or ‘W’ on the barrel of the objective. The water immersion objective is highly recommended when imaging live cells which are in cell medium. There are two types of water immersions objectives (s. Figure …

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Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water

Heavy metal contamination in water is a serious risk to the public health and other life forms on earth. Current research in nanotechnology is developing new nanosystems and nanomaterials for the fast and efficient removal of pollutants and heavy metals from water. Here, we report graphene oxide-based microbots (GOx-microbots) as active self-propelled systems for the …

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