Microscopy Primer
Light and Color
Microscope Basics
Special Techniques
Digital Imaging
Confocal Microscopy
Live-Cell Imaging
Photomicrography
Microscopy Museum
Virtual Microscopy
Fluorescence
Web Resources
License Info
Image Use
Custom Photos
Partners
Site Info
Contact Us
Publications
Home

The Galleries:

Photo Gallery
Silicon Zoo
Pharmaceuticals
Chip Shots
Phytochemicals
DNA Gallery
Microscapes
Vitamins
Amino Acids
Birthstones
Religion Collection
Pesticides
BeerShots
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery

Polarized Light Microscopy Digital Image Gallery

Biotin

Sometimes referred to as vitamin H, biotin is a water-soluble, nitrogen-containing acid, which is a constituent of the B-complex family of vitamins. The relatively stable substance can be found in a wide variety of foods, such as liver, egg yolks, wheat bran, raspberries, tomatoes, cauliflower, chicken, and pork, though often only in small quantities.

View a second, third, fourth, and fifth of Biotin

Biotin serves an array of functions in the human body, but is particularly important for metabolism of fats, carbohydrates, and amino acids. However, the necessary daily intake of the vitamin, which is typically believed to be 100 to 200 micrograms for adults, is quite low. Thus, naturally occurring biotin deficiencies are extremely rare. When deficiencies of the vitamin do occur it is usually due to one of two different genetic enzyme disorders that effectively result in an increase of the bodily requisite for biotin. Eating an excessive amount of raw egg whites, which contain the biotin antagonist avidin, can also induce the condition. Visible indicators of biotin deficiency include hair loss and a scaly red facial rash, while neurological symptoms include fatigue, depression, numbness or tingling sensations in the limbs, and hallucinations.


BACK TO THE CHEMICAL CRYSTALS GALLERY

BACK TO THE POLARIZED LIGHT GALLERY

Questions or comments? Send us an email.
© 1998-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Tuesday, Jul 25, 2006 at 09:03 AM
Access Count Since November 20, 2003: 9144
All of the images in this gallery were captured with a QImaging Retiga camera system.
For more information on these cameras, use the button below to access
the QImaging website:
Visit the QImaging website.
For more information on microscope manufacturers,
use the buttons below to navigate to their websites: