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134

Showing resources 101 to 120 of 134

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  • Microscopic view of cells. Some are blue and some are larger and red. Caption: on how to make early cancer detection cheaper.

    There are only a few procedures that can detect very early signs of cancer. Those that do are often invasive, expensive, and uncomfortable. With support from the National Science Foundation, Vadim Backman of Northwestern University is developing technology that makes detecting cancer earlier. He’s doing it by shedding light on cancer cell development at the nanoscale level.

    (Source: DCMP)

  • Closeup of vibrant green leaves. Caption: that form a network throughout the plant structure.

    Students explore the characteristics of nonvascular land plants as well as some of the simpler vascular plants. An in-depth look at mosses, hornworts, and liverworts serves as the topic of study for the beginning of the program. The characteristics of more advanced vascular plants are then explored such as whisk ferns, horsetails, and ferns. Concepts and terminology include: Bryophyta, Hepaticophyta, Anthocerophyta, rhizoids, gametophyte, sporophyte, Lycophyta, Pterophyta, spores, and sori.

    (Source: DCMP)

  • Extreme closeup of the cell structure of coral showing rectangular shape in the center of textured cell material. Labeled, (algae) ZooXanthellae. Caption: Zooxanthallae live inside some of the coral's cells.

    What are coral? They are part animal, vegetable, and mineral. These marine invertebrates typically live in compact colonies of many identical individual polyps. Corals species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. Part of the "Coral Comeback" series.

    (Source: DCMP)

  • Person in a science lab working with complex machinery. Caption: There is almost no limit to the ways we transmute matter.

    Students will trace the history of chemistry and study accounts of how chemistry developed from a practical discipline into a science. This episode also presents a current, real-life application of chemistry by illustrating the process of the refining and purifying pure silicon for advanced electronics, such as cell phones and solar cells. Part of the Chemistry: Challenges and Solutions Series.

    (Source: DCMP)

  • Person with their palms scraped and mildly bloody. Caption: The body acts quickly to stop excessive blood loss.

    The immune system has a tough job keeping human bodies free of harmful microbes. Humans come in contact with germs and bacteria every day, and the immune system is challenged to protect the body. Explores how the human body goes to battle against germs in order to keep people healthy and how sometimes the immune system requires assistance.

    (Source: DCMP)

  • A discoloured coral colony labeled, bleached coral colony. Caption: The symbiont provides 75 percent to 80 percent of the energy.

    Corals get much of their energy from symbiotic algae that live inside their cells. When ocean temperatures rise beyond a certain threshold, the algae’s photosynthetic machinery may be damaged and produce harmful reactive oxygen molecules. This animation shows how corals subsequently eject their algae in a process called coral bleaching, which causes the corals to turn white and often eventually die.

    (Source: DCMP)

  • An enlarged view of the cells lining the retina is shown from an eyeball. A colorful and a black and white picture of parrot are shown on either side of the eyeball.

    What color is a banana? Duh, it’s yellow. But what is yellow? How do humans see color in the first place? This series of questions led host Joe Hanson down the path of trying to decode the visual system of humans. Part of the "It's Okay to Be Smart" series.

    (Source: DCMP)

  • Closeup of terraced moss on a hillside with water dripping from it. Caption: early land plants most likely lived in moist environments.

    The conquest of land by plants and their proliferation is an biologic story. This video highlights the evolution of plants, while also describing the major groupings of modern-day plants. Concepts and terminology include: chloroplasts, photosynthetic pigments, cell wall, green algae, nonvascular plants, vascular plants, gymnosperm, angiosperm, alteration of generations, Bryophyta, Hepaticophyta, Anthocerotophyta, Pteridophyta, Lycophyta, Sphenophyta, Psilotophyta, Coniferophyta, Cycadophyta, Gnetophyta, Ginkgophyta, and Anthophyta.

    (Source: DCMP)

  • Complex diagram showing ADP and Potassium on one side of a cell wall and ATP synthase moving through the cell wall to the other side. Caption: The enzyme uses energy from the backflow of hydrogen ions

    Part of the "Visualizing Cell Processes" series. Includes the following modules on photosynthesis: "Chloroplast Structure," "Light Trapping by Chlorophyll," "Light–Dependent Reactions of Photosynthesis," and "The Light–Independent Reactions of Photosynthesis." Includes the following modules on cellular respiration: "Glycolysis and Fermentation," "Mitochondrion Structure," "Aerobic Respiration," "Krebs Cycle," "Electron Transport Chain," and "ATP synthesis."

    (Source: DCMP)

  • Microscopic view of a spherical cell in other structures. Caption: This means a lot of new growth as cells divide and redivide

    The body is like a self-supporting hospital, able to deal with its own with wounds, bacterial invasions, fractures, and obstructions to its various passages. Follows the sequence of events over seconds and weeks when skin or bone is damaged, and shows the defensive reactions of blood clotting, fever, and mending of bone fractures.

    (Source: DCMP)

  • Closeup of a huge pile of kernels of dried corn. Caption: making corn the number-one crop by weight.

    The evolution of the uses of corn coincides with some significant historical events. Throughout history, it has been a staple in the human diet, but in the 1950’s, it became the main ingredient in the meat industry. Farmers used corn to shrink the growth periods of cattle to meet the demand of the consumer. Corn syrup was born from the Cuban Embargo. Today, genetically engineered corn is seen in nonfood products.

    (Source: DCMP)

  • A person speaking. Illustration of a lion and a flying insect. Natural Selection. Caption: says that those individuals with beneficial traits,

    From fossil evidence, it appears that life may have existed on Earth as early as 3.5 billion years ago. This suggests that life must have evolved sometime during Earth's tumultuous first billion years. How did life evolve? What did early forms of life look like? Topics covered include protocells, endosymbiosis, prokaryotes, eukaryotes, evolution, heredity, variation, natural selection, genetic drift, and gene flow. Part of the "Biology" series.

    (Source: DCMP)

  • An animal with the body of a lion, an extra goat head on its back, and a snake instead of a tail. Caption: Chimera.

    In biology, a chimera is a single organism whose body is made from parts of two or more genetically distinct individuals of the same species. Biological chimeras were once thought to be rare, but modern genetics has shown that these genetic mashups are more common than previously thought. Part of the "It's Okay to Be Smart" series. Please note this title discusses human reproduction.

    (Source: DCMP)

  • Illustration of a cell split in two that appears to be ready to eat something. Caption: T-Cells produce proteins that turn ordinary macrophages into killers

    Homeostasis refers to the body’s ability to maintain a stable internal environment, and maintaining homeostasis requires that the body continuously monitors its internal conditions. From body temperature to blood pressure to levels of certain nutrients, each physiological condition has a particular set point. Topics covered include homeostasis, negative feedback loop, nervous system, endocrine system, digestive system, excretory system, musculoskeletal system, and the immune system. Part of the "Biology" series.

    (Source: DCMP)

  • Illustration of objects moving from a chamber with disk shaped spiny structures to an empty chamber. Caption: Here, we force bacteria to move electrons

    In Bruce Logan's lab at Penn State University, researchers are working on developing microbial fuel cells (MFC) that can generate electricity while accomplishing wastewater treatment. In a project supported by NSF, they are researching methods to increase power generation from MFCs while at the same time recovering more of the energy as electricity. Through their research projects, Logan’s team has already proven that they can produce electricity from ordinary domestic wastewater.

    (Source: DCMP)

  • Person picking up wood chips and putting them into a plastic bag. Caption: (Huber) Cellulose is basically stored solar energy

    Like everyone else, George Huber knows money doesn't grow on trees. But, ask him where gasoline comes from and he won't just tell you, he'll show you. To fully understand, Science Nation recently went with Huber to a local lumber yard in Amherst, Mass. A lumber yard is the perfect place to find cellulose, the key building block in plant cells and the organic material that gives plants their structure. So what does cellulose have to do with gasoline? A lot.

    (Source: DCMP)

  • Computer screen showing cross section of a scan of the human brain. Caption: inside neurons to form new connections between brain cells,

    Psychiatrist and author Dr. Norman Doidge travels across North America to meet some of the pioneering researchers who made revolutionary discoveries about the plasticity of the human brain. He also visits with people, once thought to have had incurable brain injuries, who are now living normal lives. Known in scientific circles as "neuroplasticity," this radical new approach to the brain provides an incredible way to bring the human brain back to life.

    (Source: DCMP)

  • Three children. One drinking out of a cup. Caption: which breaks down starch into sugar,

    Enzymes are proteins which are manufactured by the human body during the process of protein synthesis. They are catalysts that drive every chemical reaction taking place in the human body, and they enable the human body to be built from proteins, carbohydrates, and fats. Enzymes are highly specific in their activity and form an enzyme-substrate complex speeding up processes as they lower the activation energy during a given reaction period. Through genetic engineering and by isolating specific enzymes, it has become possible to harness the power of enzymes.

    (Source: DCMP)

  • Illustration of nerve cells and the connections between them. Caption: It targets the brain's reward system

    Peoples’ attitudes about marijuana have changed dramatically over the years, but one thing is certain--marijuana changes the way the brain functions. The THC in marijuana enters the lungs, is absorbed into the bloodstream, and enters the brain almost immediately. Viewers will understand the immediate effects of marijuana use on various body systems. This program also discusses the effects of marijuana on attention, memory, and learning. Part of the "Talk It Out" series.

    (Source: DCMP)

  • Blurry city in background. Taste and Smell.

    Smelling is as natural as breathing. Sixteen times a minute, air passes through the nose to fill the lungs. Billions of molecules passing through the nasal cavities are captured by the cells of the olfactory organ. Scientists and others are presently working in the realms of taste and smell to understand their powers. They are bringing to light the mystery that, from conception to adulthood, reveals a fabulous potential. Is it possible that one day the nose will help uncover diseases, vanquish pain, and lower stress levels? Part of the “Human + The Future of Our Senses” series.

    (Source: DCMP)

Collections

3

Showing collections 1 to 3 of 3

  • Biology

    • Video
    • Image
    • Text Document
    • PDF
    • 2.5D Tactile Graphic
    • 3D Model
    • Audio File

    Biology related concepts

    A collection containing 59 resources, curated by Benetech

  • Animals

    • Video

    Resources to teach younger students about animals

    A collection containing 58 resources, curated by DIAGRAM Center

  • Chemistry

    • Video
    • Image
    • 2.5D Tactile Graphic
    • PDF
    • Text Document
    • Simulation

    A collection of Chemistry related resources

    A collection containing 67 resources, curated by Benetech