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Lab 1

Inferred lifecycle of eukaryote ancestor.jpg

Figure 2. Inferred life cycle and high degree of organellar complexity of the last common ancestor of all extant eukaryotes. Origin of the cell nucleus, mitosis and sex: roles of intracellular coevolution Thomas Cavalier-Smith http://www.biology-direct.com/content/5/1/7

© 2010 Cavalier-Smith; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Lab 2

The use of confocal microscopy in observing melanin and the skin

The human skin is a complex organ in the way that it protects the rest of the body from light and UV penetration. Although its has been determined that “skin optics respect the rules of absorption, reflection and scattering” (Corcuff, P et al 2001), the skin still has features that may prevent direct penetration of light. These include • The stratified, layered nature of the epidermis • Biochemical composition of both the epidermis and dermis • Melanin within the epidermis and haemoglobin from blood in the dermis. For these reasons, in vivo observation of the skin in its physiology and responses to stimuli has always been somewhat of a challenge. What Corcuff, P et al experimented with was a method of observing the skin of the forearm before sun exposure and for a month afterward using confocal microscopy techniques. Observations were made in regards to melanasome (melanin-containing organelle) caps within basal keratinocytes (skin cells in the deep epidermis). The use of in vivo confocal microscopy also “affords new insight to the role of melanin and its gradual migration after sun exposure”

In vivo confocal microscopy involved reflected singals being used to create an image. Contrast was improved due to absorption and scattering (minimal loss of photons). Another feature that was regarded was realtime imaging to prevent blurring from motion caused by blood pulses and involuntary movement.


• Skin optics revisited by in vivo confocal microscopy: Melanin and sun exposure PIERRE CORCUFF, CIdLINE CHAUSSEPIED, GENEVIEVE MADRY, and CHRISTOPHE HADJUR, L'Ordal Journal of Cosmetic Science, 52, 91-102 (March/April 2001)

http://journal.scconline.org/pdf/cc2001/cc052n02/p00091-p00102.pdf

--Z3330409 (talk) 18:02, 27 March 2013 (EST)

Linkios

Cell_Biology_Introduction

Hello

Snoopy

Red White Blood cells 01.jpg

Red White Blood cells 01.jpg

Red White Blood cells 01.jpg
Red White Blood cells 01.jpg
Look, blood cells!

BULLET POINTS, YALL!

  • Whoa, point 1!
  • And a second point
  • Free number three!