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  • Video 
    How Synthetic Biology Can Improve Our Health, Food And Materials

    How Synthetic Biology Can Improve Our Health, Food And Materials

    What if we could use biology to restore our balance with nature without giving up modern creature comforts? Advocating for a new kind of environmentalism, scientist and entrepreneur Emily Leproust rethinks modern sustainability at the molecular level, using synthetic biology to create green alternatives. From lab-developed insulin and disease-resistant bananas to airplanes made of super-strong spider silk, she explains how reading and writing DNA can lead to groundbreaking innovations in health, food and materials.

    Subjects:
    Biology
    Keywords:
    Biotechnology Bioengineering
    Resource Type:
    Video
     
  • Video 
    Obesity Genetics: Health Consequences of Being Fat

    Obesity Genetics: Health Consequences of Being Fat

    Easy access to nutrients has contributed to the increase in obesity in the human population. But, what is obesity and why isn’t everybody fat? Dr. Stephen O’Rahilly provides a biomedical perspective of obesity, and evaluates which genes could potentially shift the balance towards obesity. As he explains, one becomes obese when the balance between energy intake and energy spent is shifted. Surprisingly, mutations that lead to obesity in humans aren’t in genes involved in metabolism and energy storage, but failure in satiety signals in the brain that result in people eating too much. The excess of energy intake over energy expenditure leads to obesity. What is the consequence of obesity in human health? Physically, obesity can result in lower mobility and sleeping disorders. But, in humans, the link between obesity and metabolic diseases isn’t straightforward. For example, not everyone that’s obese becomes insulin resistant. As O’Rahilly explains, the probability of an obese individual to have a metabolic disease is linked to the capacity of adipose tissue to store the extra fat. Mutations that decrease fat storage in adipose tissue increase the chance of metabolic diseases, like insulin resistance, even when the person is not obese.

    Subjects:
    Health Sciences and Biology
    Keywords:
    Obesity -- Genetic aspects
    Resource Type:
    Video
     
  • Video 
    An Evolutionary Perspective on Human Health And Disease

    An Evolutionary Perspective on Human Health And Disease

    How does your genetic inheritance, culture and history influence your health? Biological anthropologist Lara Durgavich discusses the field of evolutionary medicine as a gateway to understanding the quirks of human biology -- including why a genetic mutation can sometimes have beneficial effects -- and emphasizes how unraveling your own evolutionary past could glean insights into your current and future health.

    Subjects:
    Health Sciences, Public Health, and Human Biology
    Keywords:
    Human genetics Health
    Resource Type:
    Video
     
  • Video 
    Boyle's Law (Screencast)

    Boyle's Law (Screencast)

    Learners apply the principles associated with Boyle’s Law.

    Subjects:
    Chemistry
    Keywords:
    Boyle's law Gas laws (Physical chemistry)
    Resource Type:
    Video
     
  • Video 
    Chemistry Math - Solving a Formula (Screencast)

    Chemistry Math - Solving a Formula (Screencast)

    Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.

    Subjects:
    Chemistry
    Keywords:
    Chemistry -- Mathematics
    Resource Type:
    Video
     
  • Video 
    Electromagnetic Radiation (Screencast)

    Electromagnetic Radiation (Screencast)

    In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

    Subjects:
    Chemistry
    Keywords:
    Electromagnetic waves
    Resource Type:
    Video
     
  • Video 
    Taffy Atoms

    Taffy Atoms

    Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

    Subjects:
    Chemistry
    Keywords:
    Chemicals Molecules Chemical elements Atoms
    Resource Type:
    Video
     
  • Video 
    Introduction to the Periodic Table (Screencast)

    Introduction to the Periodic Table (Screencast)

    In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.

    Subjects:
    Chemistry
    Keywords:
    Periodic table of the elements Chemical elements
    Resource Type:
    Video
     
  • Video 
    Product Yields in Chemical Reactions (Screencast)

    Product Yields in Chemical Reactions (Screencast)

    Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

    Subjects:
    Chemistry
    Keywords:
    Chemical reactions
    Resource Type:
    Video
     
  • Video 
    Biomolecules: The Carbohydrates (Video)

    Biomolecules: The Carbohydrates (Video)

    Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.

    Subjects:
    Chemistry
    Keywords:
    Carbohydrates Biomolecules Organic compounds
    Resource Type:
    Video