Month: May 2018

    Cool Inexpensive Microscope Choices

    Dr. Elaine Humphrey, the Manager of the Advanced Microscopy Facility at the University of Victoria shared her impressions of equipment in her personal collection of microscopes. She is very keen on getting young people inspired by science through use of microscopes. When they get excited the next step is often the purchase of an inexpensive microscope for home – but what to choose?

    These microscopes may look like toys but I witnessed startling results with many of them when they were demonstrated.

    Carson I-Phone Adapter

    Anyone with an I-phone is at an advantage in that it can now be easily rigged up to couple with the eyepiece of a low cost microscope. They capture truly excellent images. There are several brands that work with a smart phone Carson adapter

     

    The Echo Wooden Microscope

    One of her favorites is the Echo Wooden Microscope works well and is usable in the field under rough conditions.

     

    Foldscope Origami Microscope

    Foldscopes come in a nice metal box and is an origami microscope that used to be 50 cents but now costs $2

     

    Abedoe Microscope

    This one, used with an I-phone is by Abedoe. It comes with a black light source for special applications.

    • 60X zoom microscope magnify lens for universal phones,60X zoom microscope magnify lens for universal phones
    • Bright LED light of the magnifying Glass provides enough light at any dim conditions
    • Great design for inspecting the tiny objects
    • Portable and convenient design, easy to carry with your mobile phone
    • Included a UV currency detector for checking counterfeit currency

     

    USB Microscope

    I have the pluggable at a third of the price but I find the Celestron is far better with much more resolution.

     

    My First Lab

    This lightweight, from My First Lab, is a compound microscope is a solid instrument which would work well in the field for a field worker – or be a fine starter instrument for a young person.


     

    Categories: Equipment, For Beginners

    Larvacean Found in Plankton Trawl

    The larvacean Oikpleura sp.

    Until yesterday I was unaware of these tiny organisms that I found in a trawl with my plankton net in the Georgia Strait between Vancouver Island and the mainland. Looking at them under the microscope, at first I thought that they were very young fish but experts in microscopic life made a positive identification as being Oikopleura sp.

    They are urochardates known as larvaceans, related to the tunicates (sea squirts). Although they are technically invertebrates they have a body plan that resembles a fish with a backbone. These animals have one of the smallest DNA genome sequences of any animal. They live a very short lifespan of only a few days. They release eggs and sperm into the ocean to reproduce. Living only a few days they can appear in large numbers becoming an important component of the food chain.

    This example was squeezed out of the water drop when I lowered the cover slip onto the glass microscope slide. It is laying alongside the edge of the glass cover slip and I just happened to notice it when I was scanning the slide for interesting targets.

    They carry captured debris in tiny nets which, when they get clogged, are abandoned and eventually sink to the bottom. Carrying remnants of their food (bacteria and phytoplankton) this moves the Carbon from the atmosphere sequestered by phytoplankton as biomass back into the chemical form. In the process they become an important food source for larger organisms. These ‘nets’ are a significant portion of the ‘white snow’ that is observed in the water column slowly sinking to the ocean bottom.

    Categories: Animals