Cell Size and Scale Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Magnifying the Universe Embed this infographic on your site! <iframe width="500" height="323" scrolling="no" src=" frameborder="0" allowfullscreen></iframe><br />Copyright 2012. <a href=" the Universe</a> by <a href=" Sleuth</a>. The above is an interactive infographic. We have also developed a complimentary poster that you can view here: Sizes of the Universe poster. If you're technically inclined, here's a look at the references we used to construct these infographics: Facts About The Universe.
Signaling Pathways: Angiogenesis Angiogenesis is the formation of new blood vessels and can be induced by tumor growth, tissue wound, and inflammation. Rapid tumor cell growth creates intracellular hypoxia. Hypoxia-inducible factor (HIF) is a transcription factor that responds to changing intracellular oxygen concentration. Under typical oxygen levels (normoxia), HIF is hydroxylated and acetylated, modifications that target the transcription factor for VHL-mediated ubiquitin degradation. During hypoxia, HIF accumulates and is transported to the nucleus where it induces expression of numerous target gene products. Secreted growth factors (such as VEGF, FGF, and TGF) induce signaling pathways (including PLCγ, PI3K, Src, and Smad signaling) that result in endothelial cell proliferation, increased vascular permeability, and cell migration.
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Learn Biology Online For Free with our Huge Collection of Open Courses If you’ve always been interested to learn more about nature and the diversity of life, you can now Learn Biology Online for Free! Free Biology courses are easy to find yet some of the ones you find may not be worth your time. We’ve put together a list of Biology courses from well-respected institutions such as John Hopkins, Yale, MIT, Stanford, and UCLA. Fibroblast Growth Factor-2 Gene Transfer Can Stimulate Hepatocyte Growth Factor Expression Irrespective of Hypoxia-Mediated Downregulation in Ischemic Limbs + Author Affiliations Correspondence to Yoshikazu Yonemitsu, MD, PhD, FAHA, Division of Pathophysiological and Experimental Pathology, Department of Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. E-mail firstname.lastname@example.org Abstract Hepatocyte growth factor (HGF) is a potent angiogenic polypeptide that stimulates angiogenesis.
PDB Newsletter Biomedical animator Drew Berry ( Walter and Eliza Hall Institute of Medical Research ) is known for his fantastic and detailed depictions of complex biomolecular systems. His award-winning work, which can be viewed online, in television and film, and in museums throughout the world, now appears in new and unusual venues thanks to a collaboration with the musician Björk. Björk's latest project Biophilia manifests her love for music, technology, and nature in many ways: an album, iPad app, touring production (which includes a 24-woman Icelandic choir and a musical Tesla coil), and a music education initiative. To accompany the song "Hollow," Björk's meditation on biological ancestry, Berry created a lush landscape for DNA to replicate (and sparkle) to the music.
Diversity "Diversity is not about how we differ. Diversity is about embracing one another's uniqueness." - Ola Joseph "United we stand, divided we fall." - Aesop (620 -560 B.C.)