cells differentiate
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After a discussion of electrochemical cells, Professor Sylvia Ceyer defines the points of oxidation and reduction in a battery as the anode and cathode, respectively. She discusses the application of Faraday's Law and its relationship to electrochemical cells. Finally, the relationship between cell potential and Gibbs free energy is highlighted.
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Oxygen uptake by hemoglobin in red blood cells.
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How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).
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An overview of early development of a zygote to an embryo. Embryonic and somatic stem cells.
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Redox reactions to drive Galvanic Cells.
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Overview of B cells (B lymphocytes) and how they are activated and produce antibodies.
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How does IT differentiate Jet Blue? Neeleman on things they are doing well: We decided to roll out a frequent flyer program, but held on long enough to make sure it was completely implemented and managed online--we don't send anything out via mail. JetBlue has 10 or 15 people available via telephone to deal with problems, and 700,000 members online. Neeleman on things JetBlue should improve: checking people in using technology, increasing ...more
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August 21, 2008 presentation by Stacey Bent for the Stanford University Office of Science Outreach's Summer Science Lecture Series. Meeting the world's growing energy needs in a sustainable fashion is one of the most pressing problems of our time. Professor Bent introduces the scope of the energy problem and some of the options for sustainable energy, then will focus on two main devices: solar cells and fuel cells. Solar cells convert t...more
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Evolving in a silent, dark world, organisms developed receptors that could detect and differentiate components of the electromagnetic spectrum from the sun. Computation of the proportions of different wavelengths emitted from objects is used to form the perception of colour by the visual system, enhancing the ability to differentiate objects from background. The beauty of colour, used by individuals, artists and commerce is important in a...more
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How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells.
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In this lecture, Professor Diamond continues her discussion of hematology by describing the two major blood cell types, erythrocytes and leukocytes. She begins by reviewing erythrocytes (red blood corpuscles or RBCs) and their characteristics. She discusses differences between RBC counts in men and women and factors like exercise that impact RBC counts. She then contrasts the properties of erythrocytes with those of leukocytes, noting t...more
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Introduction to helper T cells and their role in activating B cells.
