Cell Differentiation
In this video segment from The Secret of Life school video, "Sex and the Single Gene" follow as a single fertilized egg cell divides, differentiates, and assembles into the tissues and organs of a new organism.
Cell Biology
Test your knowledge about cell differentiation, cell function and tissue culture.
Manned Mission to Mars
This lesson will discuss the details for a possible future manned mission to Mars. The human risks are discussed and evaluated to minimize danger to astronauts. A specialized launch schedule is provided and the different professions of the crew are discussed. Once on the surface, the crew's activities and living area will be covered, as well as how they will make enough fuel to make it off the Red Planet and return home.
Collaborative Decision Making: NASA's Deep Impact Mission
The NASA's Deep Impact Mission is used to teach collaborative decision making. This Starting Point Teaching Collection page describes the highly-developed unit plan involving collaborative problem solving using data. The subject is the launch of a probe to investigate the composition of a comet. The students will engage in quantitative risk analysis, role-playing, persuasive writing and speaking, and group decision-making procedures. The students will study the objectives and the risks of the pr
Bringing the Laboratory into the Lecture Hall
As part of their general education studies, all students at the University of Kentucky must take two natural science courses. Many non-science majors choose the biology sequence of courses. Unfortunately these courses are lecture-only courses, and so some students can graduate without ever having had a science laboratory course. In an effort to provide students with some laboratory experience, I have developed / adapted a number of laboratory activities, which I have successfully incorporated in
Carbon Dioxide Uptake in Plants: A Computer-Aided Experimental System
This exercise introduces students to concepts of photosynthesis at the whole organism level and to computer utilization in biology. Changes in carbon dioxide concentration are measured in environmental chambers using gas analyzers connected to computers. Carbon dioxide changes are graphed in real time as the plants take up CO2. Over a short time, sunflower seedlings show dramatic changes in CO2 uptake when light intensity is altered or color filters are used. Comparison of the resulting graphs w
Alporas' closed cell aluminium foam
Additions are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% titanium hydride is then added to the melt, and this foams the melt by releasing hydrogen. The foamed melt solidifies to yield a closed cellular structure with an average cell size of 4.5 mm
Community-Oriented Primary Care: A Path to Community Development
Although community devel- | H. Jack Geiger, MD, MSciHyg opment and social change are not explicit goals of community- oriented primary care (COPC), they are implicit in COPC’s emphasis on community organization and local participation with health professionals in the assessment of health problems. These goals are also implicit in the shared understanding of health problems’ social, physical, and economic causes and in the design of COPC interventions.
In the mid-1960s, a community health cen
Biomechanical evaluation of the intact, injured and surgically reconstructed ulnar collateral ligame
The ulnar collateral ligament (UCL) of the elbow is a major passive stabilizer againstvalgus moments and is a frequent site of injury for the professional throwing athlete. Due to theimportance of the UCL in elbow stabilization, many clinical and biomechanical studies wereconducted in the past to understand its role; however, no study has evaluated the stabilizingfunction of the UCL when subjected to a pure valgus-varus moment at varying degrees of flexion.In addition, few comparative studies ha
National Middle School Science and Technology Bowl
Two competitions: an academic competition in which middle school students answer fast-paced questions about math and science (earth, physical, life, and general science) and a model fuel cell car competition that challenges students to design, build, and race model cars.
Natural Inquirer Journals: Tropical
In the Tropical edition of the Natural Inquirer you will learn about different types of plants and animals. The tropics are the home of a variety of biomes, or regions with different kinds of vegetation and other life. Tropical biomes are largely defined by the amount of rainfall they get. In the tropics, you might find rain forests, dry forests, shrub lands, tropical plains called savannahs, and deserts. Scientists working in the International Institute of Tropical Forestry, or IITF, conducted
Obsessions with the Unknown - Dr Bill Durodié
Dr Bill Durodié (Resilience Centre, Cranfield University). When former US Secretary of State for Defence, Donald Rumsfeld, warned of the dangers lurking within the 'unknown unknowns' at a press conference in 2002, he was using an increasingly common argument - widely advocated by environmental campaigners before him - that the risks we should really worry about are those that we don't even know we know nothing about. Is this line of argument fruitful for risk management processes or is society
BIONET - Brochure: Organic Autumn Cultivation 2010
