• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

I am going to be preparing a slide of an onion piece and looking at it through a microscope in low and high powers. By doing this I expect to accomplish a drawing of an onion cell close up and how to use the assured tools similar to the microscope.

Extracts from this document...

Introduction

Jetesh Kerai 10T

image00.png

Introduction:

I am going to be preparing a slide of an onion piece and looking at it through a microscope in low and high powers. By doing this I expect to accomplish a drawing of an onion cell close up and how to use the assured tools similar to the microscope.

Discussion:

Microscopy is vital for the reason that it allows you to look into certain bits and pieces closely and find out more information about the item. It allows you to glance at many existing cells and other things as well.

History:

In 1665 an Englishman named Robert Hooke cut out some very thin strips of cork and looked at them using a very primitive microscope. What he saw

...read more.

Middle

KnifeOnionDissection scissorsFine forcepsWaterPipetteMicroscope slideMicroscopeCover-slipMounted needleIodine solutionFilter paper

Method:

  • I sliced vertically through an onion bulb and detached one of the leaves of the bulb.
  • With a pair off of fine forceps I cautiously peeled off its epidermis, being cautious not to separate the cells from the layer beneath.
  • Using a razor-sharp pair of dissection scissors I cut out a piece of epidermis about 5mm by 5mm.
  • Using a pipette I carefully placed a drop of water on a clean microscope slide.
  • I carefully placed the epidermis in the drop of water ensuring that it was flat, using a mounted needle if necessary.
  • I positioned a cover slip on top of the epidermis, again making sure that it was kept flat.
...read more.

Conclusion

Results:

Discussion of Vocational Implications:

Two differences between school microscopy and microscopy in the industry is that in school we use light microscopes that need light to obtain the image by reflecting off the mirror and have. In industry however scientists use electron microscopes. Another difference is that scientists have microscopes with more magnifications so they can look deeper into the cell. In school the microscopes used have not got the ability to magnify over 40x (10x4=400). One similarity is that the same method is used. We put the tissue to be examined on the slide and examine it looking through different magnifications. Another similarity is that scientists look at the same things we do in school such as onion slides and other tissues.  

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Microscopes & Lenses section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Microscopes & Lenses essays

  1. Peer reviewed

    Microscopy. History of the microscope:-

    3 star(s)

    Light microscopes allow us to view objects by bending light rays using a series of high powered magnifying lenses. An electron microscope depends on electrons rather than light to view an object, electrons are speeded up in a vacuum until their wavelength is extremely short, only one hundred-thousandth of white light.

  2. Peer reviewed

    How to use a Light Microscope

    3 star(s)

    even blind anybody when doing this experiment etc: * The cover slip is very small and is hard to be seen by the human eye, if this was to be handled without care there is a possible chance that it may break which would result in shattered glass which is

  1. My experiments focus is to obtain an accurate measurement for a specific lenss power.

    -4.44 480 523 501.5 21.5 4.29 2.08 1.9 1.99 0.0855 200 -5.00 670 764 717 47 6.56 1.48 1.3 1.39 0.0914 Second Experiment Results Analysis First Graph: Power result: The two intercepts give readings of 6.56 D and 6.31 D. This results in an average of 6.435 +/- 0.125 D.

  2. Use of the material Zerodur in the KECK observatory telescope. The very low CTE ...

    Imagine a forest that has been planted by nature; there is no order to the placement of the trees. This is like an amorphous substance. However, imagine a forest that has been planted by humans; the trees are in rows, in a very ordered fashion.

  1. The use of the electron microscope has advanced our understanding of cell biology further ...

    It is commonly used in small laboratories among the world and also in many secondary schools. You would need to use a light microscope to view plant and animal cells, but you would only be able to see the outline of a bacteria cell.

  2. Light Microscopes - Setting up a light microscope and preparing a temporary slide.

    Using the fine focusing knob, the image was focused until the object was sharp. Method - Preparing a temporary slide 1) An onion bulb was cut through vertically and one of the leaves of the bulb was separated off.

  1. A brief history of how the light microscope has developed since the 17th Century ...

    During his lifetime he observed many living and non-living things under his Light Microscope and wrote letters to the Royal Society of England and the French Academy, describing what he had seen. Robert Hooke, of England, confirmed Leeuwenhoek's findings on the idea of living organisms existing in a drop of water, and modified Leeuwenhoek's microscope design, by slight improvements.

  2. The History, Development and Use of the Light and Electron Microscope.

    In the previous version of the microscope as in Leeuwenhoek's design caused two main problems; the normal two lens microscope required you to look into the tube from a fairly long distance which meant that it was difficult to keep the tube in position and the two-lens design produced very dim images because of low brightness and contrast.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work