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Why might a microscopist who specializes in the use of microscopes to examine specimens use a light microscope instead of an electron microscope?
An electron microscope requires that the subject be dead to function. In order to receive a picture, the specimen must be coated in chemicals and put into a vacuum, a process which will kill any living specimen. A light microscope, although not as detailed, will allow the scientist to observe living specimens.
What advantage and disadvantage of polarized microscope?
The advantages are: (a) Basic identification of the materials was first performed by light microscopy and gross analysis. This provides a large base of published information against which to check analysis and analytical technique. (b) The analysis is specific to fibers. The minerals present can exist in asbestiform, fibrous, prismatic, or massive varieties all at the same time. Therefore, bulk methods of analysis such as X-ray diffraction, IR analysis, DTA, etc. are inappropriate where the material is not known to be fibrous. (c) The analysis is quick, requires little preparation time, and can be performed on-site if a suitably equipped microscope is available. The disadvantages are: (a) Even using phase-polar illumination, not all the fibers present may be seen. This is a problem for very low asbestos concentrations where agglomerations or large bundles of fibers may not be present to allow identification by inference. (b) The method requires a great degree of sophistication on the part of the microscopist. An analyst is only as useful as his mental catalog of images. Therefore, a microscopist's accuracy is enhanced by experience. The mineralogical training of the analyst is very important. It is the basis on which subjective decisions are made. (c) The method uses only a tiny amount of material for analysis. This may lead to sampling bias and false results (high or low). This is especially true if the sample is severely inhomogeneous. (d) Fibers may be bound in a matrix and not distinguishable as fibers so identification cannot be made. *NOTE:Source taken from http://www.osha.gov
What is Robert Hooke's contribution in microbiology?
Robert Hooke coined the term "cell."
What does it mean when a microscopist plays with the fine adjustment?
it means that they are adjusting its degrees
When Robert hooke give his contribution in biology?
e di ano? english microscopist
How was the first microscopist?
The first microscopist is often credited to be Antonie van Leeuwenhoek, a Dutch scientist from the 17th century. Leeuwenhoek was a skilled lens-maker and used his microscopes to observe tiny microorganisms, making groundbreaking discoveries in the field of microbiology. His work paved the way for advancements in microscopy and the understanding of the microscopic world.
What has the author J H Wythe written?
J. H. Wythe has written: 'The microscopist' -- subject(s): Microscopy, Microscopes, Microscopy handbooks, Microscope and microscopy 'The microscopist' -- subject(s): Histology, Microscopy, Microorganisms
Where did Leeuwenhoek live?
Antonie van Leeuwenhoek lived in Delft, Netherlands, where he spent most of his life working as a draper and developing his skills as a lens-maker and microscopist.
What words start with mikro meaning small?
microorganisims, micromanagment, microbe, microscope, microscopic, microscopist, microscopy, micromicrosecond, micrometer, microvolt, microphone, microwave, microbiology, microbiologist, microchip.
Where are parasites in humans located?
Parasites may be found in, on, or within any organ of the human body. Typically the human body will have millions of microscopist parasites at any given time, most providing little or no discomfort.
What actors and actresses appeared in Popular Science No. J-1-4 - 1942?
The cast of Popular Science No. J-1-4 - 1942 includes: James Hillier as Himself (electron microscopist) Gayne Whitman as Narrator
Spherical organelle in Eukaryotic cells contains DNA and the nucleolus commonly referred to as the control center of the cell is the?
The nucleus was the first organelle to be discovered. What is most likely the oldest preserved drawing dates back to the early microscopist Antonie van Leeuwenhoek (1632 – 1723).
Who invented the term virus?
The term "virus" was first used in 1599 by Dutch scientist and microscopist, Antonie van Leeuwenhoek, to describe infectious agents that pass through filters designed to trap bacteria. However, it was only in the late 19th century that viruses were recognized as distinct entities from bacteria.
Who studies organisms?
The first one who study organism is Hooke in the 1600s. And later on microscopist Van Leeuwenhoek observe many other living organisms including cells.
What did Anton van leeuwenhoek find he was good at?
Anton van Leeuwenhoek was a skilled lens maker and microscopist. He is known for his pioneering work in microscopy, discovering single-celled organisms and observing details of microorganisms that were previously unseen. His meticulous observations using simple microscopes laid the foundation for the field of microbiology.
