Browse "Science & Technology"

Displaying 781-800 of 812 results
Macleans

Viagra Hits Canada

This article was originally published in Maclean’s magazine on March 22, 1999. Partner content is not updated.

Bill Smith, a 55-year-old heavy-machine operator from Fredericton, knows these are his salad days revisited. As one of 500 Canadian men participating in the clinical trials of the impotency drug Viagra, he has been getting samples for two years. "They're free, so why not use them?" he says.

Article

Virus

Virus, the smallest form of life (20-300 nanometres), is structurally and functionally unique. Their size is such that they do not contain enough genetic material to code for the proteins they require for reproduction, nor do they have ribosomes needed to synthesize these proteins.

Article

W.D. Lawrence

W.D. Lawrence, 2548 ton square-rigged sailing ship built in 1874 in Maitland, NS. It was designed and built by William Dawson Lawrence, who earned substantial profits from the ship until 1883, when he sold it to a Norwegian.

Article

Waste Disposal

Although the term SOLID WASTE refers to a wide range of discarded materials (from kitchen scraps to mine tailings), the component known as refuse has the greatest potential for environmental contamination.

Article

Waste Reduction

The "3Rs Hierarchy of Waste Management" encourages people to reduce, reuse and recycle before considering other options for solid waste management. Reduction is at the top of the hierarchy because reducing waste (not creating waste in the first place) is the most efficient way to handle waste.

Article

Water Pollution

Water pollution occurs when discharges of energy or materials degrade the quality of water for other users, including both humans and wildlife. Pollution can affect inland waters such as lakes, rivers and groundwater, as well as coastal marine waters.

Article

Water Treatment

Water Treatment, the physical and chemical processes used to ensure water's quality for its intended use. Minimum standards for drinking water are set by environmental agencies while industries have their own guidelines.

Article

Weather

WEATHER FORECASTING is the attempt to understand atmospheric patterns to predict the weather conditions that will occur at a specific place and time, including temperature, wind, cloud, precipitation and humidity.

Article

Weather Forecasting

Most modern meteorologists attempt to cope with physical processes by expressing them mathematically, ie, by creating mathematical models of the atmosphere. Powerful computers are then used to solve problems.

Article

Weather Modification

Weather modification has been used in an attempt to increase rainfall and snowfall, to suppress hail, to clear fogs, to modify tropical cyclones and to suppress lightning. The term "weather modification" is not normally used to describe inadvertent changes in our WEATHER.

Article

Weather Observations

   Weather in Canada ranges from the extreme cold of the Arctic to tornadoes and other severe weather in the southern regions; from the storms and fog of the Atlantic to the dry heat and majestic thunderstorms of the prairies.

Article

Weights and Measures

Weights and measures are terms which traditionally referred to standards of mass (or weight), length and volume. Over the past few thousand years such standards have frequently been introduced throughout the world for trading and tax purposes.

Article

West Nile Virus

West Nile VIRUS, a member of the flavivirus family, is related to the viruses that cause dengue and yellow fevers. The effects of infection with West Nile virus range from no symptoms to severe illness and even death.

Macleans

West Nile Virus Precautions

THEY'LL SOON be here, riding the warm currents of summer: MOSQUITOES armed with the latest bioweapon - the West Nile VIRUS. Short of building a concrete bunker or setting up an unhealthy fog of repellent spray, there are ways of safeguarding the pasty flesh of Canuckus winterus.