Public Health Biology
Offers an integrative molecular and biological perspective on public health problems. Explores population biology and ecological principles underlying public health and reviews molecular biology in relation to public health biology.
Computer-based Metacognitive Training: Improving the Diagnostic Expertise of Novice Graduates
The diagnosis problem-solving task can be complex in many professions for which it is central, for example medical diagnosis, farm-management consultancy, etc. This is because often the expert must solve problems and make decisions in complex situations and while under time pressures. The complex nature of the problem situations and the novices lack of advanced metacognitive skills also make it difficult for novices to gain expertise and successfully solve problems in their fields. From the li
This site provides access to more than 4,000 reviewed resources covering 76 biological science topics: agriculture, anatomy, bacteriology, biochemistry, biodiversity, biotechnology, botany, cardiology, cell biology, ecology, environment, evolution, genetics, geography, human biology, immunology, marine biology, microbiology, molecular biology, neurobiology, pathology, pharmacology, physiology, public health, respiratory biology, soil biology, virology, zoology, and others. Registration required.
Acids and Bases: Testing Rocket Cars
A car propelled by the reaction between lemon juice and baking soda has more in common with rockets and jet aircraft than one might think. In this video segment adapted from ZOOM, two cast members demonstrate the power of rocket-propelled vehicles and how to exploit the force produced by the carbon dioxide gas. Grades 3-8.
Acids and Bases: Making a Film Canister Rocket
In this video segment adapted from ZOOM, two cast members demonstrate what happens when vinegar is added to baking soda inside a container. The resulting chemical reaction produces enough carbon dioxide to launch their paper rocket skyward. Recommended for: Grades K-5
Get This Bug Off Me!
It's a natural reaction to be frightened of some insects. Many insects have the ability to harm people, and many insects look very menacing. However, many large insects are not harmful at all. Because it would take several volumes to describe every insect, this publication is intended to distinguish several common insects and insect relatives in Kentucky that are or are not harmful.
The HPLC Doctor
This site provides HPLC troubleshooting tips. It covers common separation problems such as peak fronting or tailing and split peaks and suggests solutions. This site will be most useful for students and practitioners who already have some background knowledge of separation theory. It will be especially helpful for laboratory or research students who are developing a new separation method or are encountering problems with their chromatographic experiments.
A semaphorin code defines subpopulations of spinal motor neurons during mouse development.
In the spinal cord, motor neurons (MNs) with similar muscle targets and sensory inputs are grouped together into motor pools. To date, relatively little is known about the molecular mechanisms that control the establishment of pool-specific circuitry. Semaphorins, a large family of secreted and cell surface proteins, are important mediators of developmental processes such as axon guidance and cell migration. Here, we used mRNA in situ hybridization to study the expression patterns of semaphorins
Tips for Identifying Poison Ivy
This online article, from Biodiversity Counts, is a tip sheet to help students learn how to spot and avoid poison ivy. Specifically, it covers: an overview of the different varieties of the plant that grow in the Americas and Asia; an illustration of the compound leaf with three leaflets (trifoliate); details about poison ivy's leaf type, leaf arrangement, growth form, flowers, fruits, and relatives; how contact with the plant causes a hypersensitivity reaction in most people; a trick you can tr
Fairly Simple Geology Exercises
This is a collection of 18 geology exercises that are designed for teachers with little or no geology background. Each exercise includes relevant background information, complete instructions, student handouts and answer keys. Topics include rock and mineral identification, Bowen's reaction series, crystal models, topographic maps, earthquakes, groundwater, oil exploration, plate tectonics and more.
4.4.1 Introduction Since its development, the three-way catalyst has been exposed to the full spectrum of techniques available for the characterisation of catalytic materials. The data provided can be correlated with the results of activity tests and kinetic measurements, which provide information on the performance of the catalyst. This reveals that although the catalyst functions as a composite material, it can be divided into distinct groups of catalytic centres that provide several different types of site,
Since its development, the three-way catalyst has been exposed to the full spectrum of techniques available for the characterisation of catalytic materials. The data provided can be correlated with the results of activity tests and kinetic measurements, which provide information on the performance of the catalyst. This reveals that although the catalyst functions as a composite material, it can be divided into distinct groups of catalytic centres that provide several different types of site,
1.5.5 Fossils and ancient environments An essential component of any environment is the plant and animal life that is adapted to the prevailing conditions. Fossil plants and animals are therefore wonderful sources of information about ancient environments. Plants can leave behind remains ranging from roots, leaves and twigs to seeds and pollen. Leaves and twigs are relatively fragile, and require a comparatively low energy environment (e.g. the mudflats of an estuary) for their preservation. Seeds, pollen and spores are surprising
An essential component of any environment is the plant and animal life that is adapted to the prevailing conditions. Fossil plants and animals are therefore wonderful sources of information about ancient environments. Plants can leave behind remains ranging from roots, leaves and twigs to seeds and pollen. Leaves and twigs are relatively fragile, and require a comparatively low energy environment (e.g. the mudflats of an estuary) for their preservation. Seeds, pollen and spores are surprising
The Microbial Biorealm
The Microbial Biorealm is an informational site about microbes written by students for students. Hosted by Kenyon College, the site includes molecular and taxonomic information about microbes from all three domains of life. A comprehensive table lists the properties and characteristics of each domain of life while taxonomy pages list classification, description, significance, genome structure, cell structure, metabolism, ecology, isolation, cultivation, and references specific to individual taxa
This Web site from the National Center for Biotechnology Information (NCBI) offers a set of detailed tutorials to help users make full use of NCBI's bioinformatics tools. The tutorials, which target both new and veteran users, cover NCBI's BLAST and PSI-BLAST, Entrez data retrieval system, Cn3D molecular structure software, and more. Additionally, the Science Primer tutorial offers a "basic introduction to the science underlying NCBI resources" geared more toward the general reader.
20.441J Biomaterials-Tissue Interactions (MIT)
This course covers the principles of materials science and cell biology underlying the design of medical implants, artificial organs, and matrices for tissue engineering. Methods for biomaterials surface characterization and analysis of protein adsorption on biomaterials. Molecular and cellular interactions with biomaterials are analyzed in terms of unit cell processes, such as matrix synthesis, degradation, and contraction. Mechanisms underlying wound healing and tissue remodeling following imp
Watch a reaction proceed over time. How does total energy affect a reaction rate? Vary temperature, barrier height, and potential energies. Record concentrations and time in order to extract rate coefficients. Do temperature dependent studies to extract Arrhenius parameters.
Lennard-Jones Potential Model
The EJS Lennard-Jones Potential model shows the dynamics of a particle of mass m within this potential. You can drag particle to change its position and you can drag the energy-line to change its total energy. The Lennard-Jones potential function is a reasonably accurate model of interactions between noble gas atoms. The binding energy epsilon is the depth of the potential well and minimum molecular separation are set equal to unity. This simulation uses uses a natural system of units the m
Molecular Dynamics Demonstration Model
The EJS Molecular Dynamics Demonstration model is constructed using the Lennard-Jones potential truncated at a distance of 3 molecular diameters. The motion of the molecules is governed by Newton's laws, approximated using the Verlet algorithm with the indicated Time step. For sufficiently small time steps dt, the system's total energy should be approximately conserved. Users can select various initial configurations using the drop down menu.
Understanding Your Water
Over two class periods, you will be guiding your students through the basics of water treatment -- both tap water treatment and sewage (or wastewater) treatment. To prepare for the lessons on the treatment process, the students will be researching where their drinking water comes from and where their wastewater goes once it goes down the drain for homework. After learning about their local water treatment and traditional tap water and sewage treatment processes, students will watch the NewsHour
The simulation program is based on the Nobel Prize winning Hodgkin-Huxley model for excitation of the squid axon. The program simulates an excised squid axon by applying stimuli or clamps after setting the environment of the axon, changing its properties, and/or adding drugs or toxins. By using the program tools, experiments can be developed that explore a variety of nerve properties, ranging from classical phenomena such as threshold, summation, refractory period, and impulse propagation to mo