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Physics & Chemistry
Physics is the the study of matter and its spatial motion; while it embraces the levels of nucleii, elementary particles and atoms, its domain relative to molecules and their interactions is more properly termed chemistry. The motion of particles is governed by the basic laws of physics including Newtonian mechanics (for large objects); electromagnetism; thermodynamics and quantum mechanics (in the case of molecular and smaller entities). The earliest forms of physics addressed are motions of celestial objects, and presently this field can be viewed as astrophysics. Physics also embraces the notions of the Theory of Relativity, so that the duality of space and time is addressed. Chemistry has taken on added importance in the last half century as the bridge between fundamental laws of nature and the understanding of cellular processes and replication of DNA, the basic molecule of organism genetic coding.
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Dark side of insulation
Building insulation has become a modish activity in the western world since the 1980s. Considerable benefits can accrue in energy conservation, occupant comfort and reduction of... More »
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International Year of Chemistry 2011 (IYC 2011)
The International Year of Chemistry 2011 (IYC 2011) is a worldwide celebration of the achievements of chemistry and its contributions to the well-being of humankind. Under the... More »
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A Walk Through Time
The Evolution of Time Measurement through the Ages. A Walk Through Time Ancient Calendars Celestial bodies — the Sun, Moon, planets, and stars — have... More »
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Global Challenges/Chemistry Solutions
Global Challenges/Chemistry Solutions Global Challenges/Chemistry Solutions is a series of podcasts describing some of the 21st century's most daunting problems, and... More »
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Potential impacts of changes in the...
Potential impacts of changes in the thermohaline circulation include climate alteration, elevation in sea level and disturbance to ecosystems. The nature of the thermohaline... More »
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Halocarbon
A halocarbon is an organic chemical molecule composed of at least one carbon atom bound covalently with one or more halogen atoms; the most common halogens in these molecules... More »
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Chemical reaction
A chemical reaction is a process that transforms one set of chemical substances to another. The substances that take part in chemical reactions are known as reactants and the... More »
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Optical and acoustical phenomena in the Arctic
Optical Phenomena In the Arctic, people frequently see unique and beautiful optical phenomena. The atmospheric conditions that can lead to the development of these... More »
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Atmospheric lapse rate
The atmospheric lapse rate ( ) refers to the change of an atmospheric variable with a change of altitude, the variable being temperature unless specified... More »
DNA
Last Updated on 2012-05-24 at 13:15
Deoxyribonucleic acid (DNA) is a long chain organic molecule that contains the coding for all metabolic and reproductive processes of all living organisms, save for certain... More »
Amine gas treating
Last Updated on 2012-05-20 at 12:45
Amine gas treating refers to a group of processes that use aqueous solutions of various alkanols (commonly referred to as simply "amines") to remove hydrogen sulfide... More »
American Meteorological Society
Last Updated on 2012-05-20 at 12:41
The American Meteorological Society (AMS) promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic... More »
Air Quality Issues and Animal Agriculture: A Primer
Last Updated on 2012-05-20 at 12:26
Introduction
Emissions of gaseous substances from agricultural operations has assumed a major focus in international views of air pollution and greenhouse gas production.... More »
Aflatoxin Contamination
Last Updated on 2012-05-19 at 18:48
Background
Aflatoxin contamination is a common phenomenon produced by the fungus Aspergillus flavus, acting on food crops consumed in both developing countries and,... More »
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