Watch alpha particles escape from a polonium nucleus, causing radioactive alpha decay. See how random decay times relate to the half life.

Biology is designed for multi-semester biology courses for science majors. It is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand. To meet the needs of today’s instructors and students, some content has been strategically condensed while maintaining the overall scope and coverage of traditional texts for this course. Instructors can customize the book, adapting it to the approach that works best in their classroom. Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand—and apply—key concepts.

By the end of this section, you will be able to:Describe advantages and disadvantages of asexual and sexual reproductionDiscuss asexual reproduction methodsDiscuss sexual reproduction methods

Learn how scientists regulate a nuclear reactor in this animation-enhanced essay from the FRONTLINE Web site.

This course integrates studies of engineering sciences, reactor physics and safety assessment into nuclear power plant design. Topics include materials issues in plant design and operations, aspects of thermal design, fuel depletion and fission-product poisoning, and temperature effects on reactivity, safety considerations in regulations and operations, such as the evolution of the regulatory process, the concept of defense in depth, General Design Criteria, accident analysis, probabilistic risk assessment, and risk-informed regulations.

Nuclear energy is a carbon-free and extremely energy dense resource that produces no air pollution. Nuclear reactions produce large amounts of energy in the form of heat. That heat can be used to power a steam turbine and generate electricity. There are 2 types of nuclear energy: nuclear fission (which is used today to produce electricity) and nuclear fusion (which is still in the research phase).

Welcome to the unit "Introduction to Nuclear Reactors". In this unit, we delve shall into the captivating world of nuclear energy, beginning with the foundational concept of nuclear fission and progressing to the detailed workings of nuclear reactors.Through three engaging lessons, learners will gain a comprehensive understanding of nuclear fission, its significance in energy production, and the essential components required for its occurrence. We'll explore the conditions necessary for fission reactions, and the importance of controlling chain reactions to ensure safe and efficient energy generation.

This is an introductory graduate-level course on the phenomenology and experimental foundations of nuclear and particle physics, including the fundamental forces and particles, as well as composites. Emphasis is on the experimental establishment of the leading models, and the theoretical tools and experimental apparatus used to establish them.

This course introduces fundamental properties of the neutron. It covers reactions induced by neutrons, nuclear fission, slowing down of neutrons in infinite media, diffusion theory, the few-group approximation, point kinetics, and fission-product poisoning. It emphasizes the nuclear physics bases of reactor design and its relationship to reactor engineering problems.

This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"Stroke is the leading cause of death worldwide. Scientists are finding that mitochondrial abnormalities play a central role in stroke. A recent study suggests that deactivating the protein SIAH2 could help mitochondria and the brain cells they power survive stroke in mice. Oxygen deprivation, which makes stroke fatal, activates SIAH2. Once activated, SIAH2 signals the breakdown of mitochondrial and cellular proteins key to survival. Aiming to curb this damage, researchers switched off the gene controlling SIAH2 formation in mouse neurons. and observed what happened after artificially inducing stroke. They found that without SIAH2, neurons suffered low damage during stroke. preserving the machinery that keeps mitochondria alive and well. Understanding how this switch operates in humans is crucial. as it could lead to drugs that target SIAH2 and help reduce the mortality of stroke..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

This unit delves into the fundamental science and historical contexts to help students explore the question "How can knowledge gained from the Manhattan Project and the Hanford Site contribute using nuclear technologies to positively impact humanity in the future?."Nuclear Chemistry is a great capstone unit for a standard high school chemistry course in that it is fantastic opportunity for students to explore the crossroads between scientific knowledge and the societal implications of new discoveries. Students will have the opportunity to Delve deep into the science standards while also connecting their learning to what it means for us as a global society.

Nuclear fission is the process of splitting a large atom into two smaller atoms and releasing a LOT of heat. That heat is used to boil water, make steam, turn a turbine and generator, and produce electricity. Most nuclear power plants today are fueled by enriched uranium 235 to produce non-renewable, carbon-free, 24/7 electricity. The byproducts of nuclear fission are highly radioactive and must be secured away from people for hundreds of thousands of years.

Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor! (Previously part of the Nuclear Physics simulation - now there are separate Alpha Decay and Nuclear Fission sims.)

Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor! (Previously part of the Nuclear Physics simulation - now there are separate Alpha Decay and Nuclear Fission sims.)

"Nuclear Power Plant Calculations" serves as a seamless continuation of the educational unit on "Introduction to Nuclear Reactors." This comprehensive resource is tailored for engineering students specializing in nuclear power, aiming to deepen their understanding of reactor dynamics and operational efficiency. Through structured lessons, learners explore fundamental concepts such as reactor power output, fuel efficiency, and core temperature regulation, building upon the foundational principles established in the previous unit. Practical problem-solving exercises are integrated throughout the resource, allowing students to apply theoretical knowledge to real-world scenarios.

This video segment adapted from FRONTLINE looks at nuclear fission as an energy source that can be used to generate electricity.

Stanford University’s Understand Energy Learning Hub provides free access to Stanford course content on energy resources from fossil fuels like oil and coal to renewable resources like the wind, the sun, and efficiency; energy currencies like electricity and hydrogen; and energy services such as transportation and buildings. Explore the Hub and build your energy literacy to address climate change and sustainability issues, engage on equity and human development challenges, participate in energy industry markets and technology innovations, and make informed energy decisions.