Come and join us as we celebrate Teen Read Week! The sub-theme for this year's Teen Read Week is "The World @ Your Library." The EMC has prepared several exciting activities...

This service via OverDrive will be available for the first 1,000 AJHS and ASHS students and teachers who will sign-up. Simply use the registration form below. ...

American Heritage Dictionary defines a pathfinder as “one that discovers a new course or way, especially through or into unexplored regions.” So, what is a library pathfinder? According to the Online...

The AHS Memory Project is the ITC’s online repository of digital materials. The platform will be used to collect, preserve and provide online access to the growing collection of its...

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Science

Scents (Perfume Making)

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How Are Perfumes Made?

“The first step in making perfume is to obtain the essential fragrance oils. This is done in many different ways. The oils may be dissolved out of flowers and leaves by solvents such as alcohol. Another method is to squeeze the oils out by pressure from heavy rollers. In some cases the petals are placed in great tanks that are heated gently. As the petals become hot, the vapors from them rise. As they cool, the vapors are collected on overhead trays.
Last Updated on Wednesday, 29 June 2011 10:02 Read more...

Air Pollution

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“Air pollution is the presence of contaminants in the atmosphere in quantities and duration that are injurious to human health and the environment. Air pollutants come from many sources and occur in many forms, but they can be categorized into two broad classes: particulates (including ashes, smoke, and dust) and gases and vapors (including fumes, mists, and odors).” 

Last Updated on Wednesday, 29 June 2011 10:01 Read more...

Biodegradable Plastics

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Biodegradation

Biodegration is “the gradual breakdown of plastics and matter by living organisms such as bacteria, fungi, and yeasts. Most of the commonly used plastics are essentially not biodegradable, exhibiting limited susceptibility to assimilation by micro- organisms. An exception is polycaprolactam. However, the growing emphasis on environmental aspects of discarded plastics has stimulated research in ways of attaining biodegradability after a predetermined time period. One method is to add a UV- light sensitizer that causes photodegradation after a period of exposure to light, followed by breakup after prolonged exposure to the elements, after which bacteria will finish the job. A third method is the deliberate incorporation of weal links in the polymer chain, temporarily protected by a degradable stabilizer.”
Last Updated on Wednesday, 29 June 2011 09:55 Read more...

Medicinal Plants / Herbs

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The scope of this pathfinder is drawn from the definition of Botanical Medicine:

“Botanical medicine is a vital component of the healing arts that draws on the accumulated and developing knowledge of the medicinal properties of plants in the prevention and treatment of disease. Botanical medicine includes medical herbalism, a healing art that relies on the synergistic and curative properties of plants to treat symptoms and disease and maintain health, and pharmocognosy, the study of natural products. Botanical medicine is an important component of numerous traditional medical systems and therapies, including traditional Chinese medicine (TCM), Ayurvedic medicine, naturopathy, indigenous and shamanic medicine, homeopathy, flower essence therapy, and aromatherapy.”
Last Updated on Wednesday, 29 June 2011 09:53 Read more...

Biodiesel

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“Biodiesel is a renewable alternative fuel produced from a wide range of vegetable oils and animal fats. Pure biodiesel or biodiesel blended with petroleum diesel can be used to fuel diesel vehicles, providing energy security and emissions and safety benefits.”

Last Updated on Thursday, 23 June 2011 21:50 Read more...

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