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Related Concept Videos

Resting Potential Decay01:15

Resting Potential Decay

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The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
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Bone Markings01:26

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Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
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Carbon Skeletons01:12

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Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
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Bonanno's Theory of Grieving01:17

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Grieving is a complex psychological and emotional process that varies significantly among individuals. George Bonanno's research on bereavement identified four distinct patterns of grieving, offering a nuanced understanding of how people cope with significant loss, such as the death of a spouse, over extended periods. These patterns — resilience, recovery, chronic dysfunction, and delayed grief — highlight the diversity in emotional responses and adaptive mechanisms.
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Bone Remodeling01:40

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Related Experiment Video

Updated: Oct 2, 2025

A High-Fidelity Porcine Model of Orthotopic Heart Transplantation Following Donation after Circulatory Death
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Final resting place.

Sedeer El-Showk1

  • 1Sedeer El-Showk is a science journalist in Helsinki who joined the communications team at Aalto University at the end of 2021. His reporting was carried out independently.

Science (New York, N.Y.)
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Finland is opening the first permanent nuclear waste repository. This success stems from decades of public engagement and a robust regulatory framework for managing high-level radioactive waste.

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Area of Science:

  • Geological and environmental sciences
  • Nuclear engineering and safety
  • Societal impacts of energy policy

Background:

  • Finland's long-term commitment to nuclear waste management.
  • The establishment of a comprehensive legal and regulatory framework.
  • The selection and development of the Onkalo repository site.

Discussion:

  • Finland's approach to public consultation and stakeholder engagement.
  • The technical solutions employed for deep geological disposal.
  • International comparisons of nuclear waste disposal strategies.

Key Insights:

  • The critical role of public trust and transparency in nuclear waste disposal projects.
  • The importance of a stable, long-term regulatory and political commitment.
  • Successful implementation requires integrating technical, social, and political factors.

Outlook:

  • Potential for Finland's model to influence global nuclear waste management practices.
  • Ongoing monitoring and safety assurance of the repository.
  • Future research directions in advanced nuclear waste disposal technologies.