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Monthly Archives: November 2010

29 Nov

How about a digital microscopes for the kids this year. When it comes to science for kids a digital microscope is one of the best tools for exploration. A digital microscope makes microscope pictures and short videos which can be … Continue reading

26 Nov

Some test media are designed to provide multiple test results. These include Kligler’s iron agar, which determines fermentation reactions for glucose and lactose and the production of hydrogen sulfide. Hydrogen sulfide is produced as a result of the breakdown of … Continue reading

25 Nov

Microscope eyepieces are the third basic optical component of compound microscopes. The other basic components are the objectives and substage condensers. Eyepieces derive from two basic designs, Ramsden and Huygenian. No matter the design, the important issue is the contribution … Continue reading

22 Nov

Where can you buy liquid nitrogen? Your local welding supply should have it. Or an industrial gas supplier. You must use the proper dewar to transport the liquid nitrogen. A dewar is different from a thermos because it is designed … Continue reading

19 Nov

Bacteria use a variety of degradative and hydrolytic enzymes to degrade large macromolecules into smaller units that can be imported into the cell. Because of the presence of the cell wall, bacteria lack the ability to surround and engulf their … Continue reading

18 Nov

The condenser is one of three optical components that are common to most modern compound, upright brightfield microscopes. The other two are the objective(s) and the eyepiece(s). The condenser is located above the light source and below the specimen stage. … Continue reading

17 Nov

Osteoporosis literally means porous bone. It is described as the thinning of bone tissue and loss of bone density over time. There are several reasons a bone can become porous. As well as it can affect a certain demographics over … Continue reading

15 Nov

Antibodies which are cloned and specific to one antigen are called monoclonal. They are generally made from mouse spleen cells fused with myeloma cells and grown in a culture media. The mouse has been immunized with the molecule of interest, … Continue reading

12 Nov

In 1846 and 1847 Ignaz Semmelweis discovered the importance of hand scrubbing at the Lying-In Hospital in Vienna. He was the head of obstetrics and noticed that the death rate due to childbirth fever was approaching 20%. He observed that … Continue reading

11 Nov

Microscope objectives are the heart and soul of the compound microscope. They are responsible for formation of the intermediate image that the eyepiece(s) then further magnify to produce the image that is ultimately observed, analyzed and/or photographed. Common microscope objectives … Continue reading