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Scurvy

Scurvy is a disease caused by a dietary deficiency of vitamin C (ascorbic acid). The disease has occurred with regular frequency throughout human history and prehistory in populations lacking fresh foods, especially vegetables and meat.

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Safety Standards

Safety Standards, documents or codes which describe characteristics or usage for products, materials and services, are intended to protect citizens from the hazards of technology.

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Genetic Engineering

Interspecies gene transfer occurs naturally; interspecies hybrids produced by sexual means can lead to new species with genetic components of both pre-existing species. Interspecies hybridization played an important role in the development of domesticated plants.

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Sailing Ships

In Canada's age of sail (1800-75) over 4000 ships, each exceeding 500 tons burthen, were built in Canada. In 1878 Canadian-registered ships numbered 7196 and totalled 1 333 015 tons. Among the nations, Canada stood fourth in seagoing tonnage.

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Transportation Association of Canada

The Transportation Association of Canada (TAC) is a non-profit association that provides a neutral forum for discussing technical issues related to road and highway infrastructure and urban transportation. It brings together governments, private companies, academic institutions and other organizations in Canada. The non-partisan association’s mission is “to work together to share ideas, build knowledge, promote best practices, foster leadership, and encourage bold transportation solutions.”

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Science Council of Canada

Science Council of Canada, organization created by federal statute in 1966 to advise the government on science and technology policy. The original membership was 25 appointed scientists and senior federal civil servants, later altered to 30 appointed eminent experts from the natural and social sciences, business and finance, and no civil servants.

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St Elmo's Fire

St Elmo's Fire is a blue or reddish glow, sometimes with the appearance of a flame, accompanying a powerful electrical discharge from a pointed conducting object in an intense electric field.

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Sonar

Sonar (sound navigation and ranging), method for locating objects by the reflection of sound waves. It is used naturally by such animals as BATS and DOLPHINS to locate food and obstacles.

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Sand and Gravel

Sand and gravel are unconsolidated, granular mineral materials produced by the natural disintegration of rock caused by weathering. The terms sand, gravel, clay and silt relate to grain size rather than composition. Sand is material passing through a number 4 (4.

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Smoking

Smoking is a universal health hazard. All forms of TOBACCO smoking are risky. Canadian consumption of cigarettes has been declining since the monitoring of smoking began in 1965, when an estimated 50% of adults smoked. In 1981 smoking prevalence had dropped below 40%.

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Silver Dart

J.A.D. MCCURDY was the principal designer and pilot; Glenn H. Curtiss developed the water-cooled engine, an advance on the association's earlier experiments.

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Submersible

The Canadian government took delivery of a HYSUB 5000 ROV in 1987. Designed and manufactured by International Submarine Engineering (ISE) of Port Moody, BC, the HYSUB is an electrohydraulic submersible remotely operated vehicle, operating with 6 to 250 hp.

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Tungsten

Tungsten (W), also called Wolfram, lapis ponderosus or Heavy Stone, is a silver-grey metallic element with the highest melting point of any metal (3410° C). Tungsten has a high density, high strength at elevated temperatures and extreme hardness.

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Time

Precise timekeeping helped establish and develop Canada. For the past 2 centuries, Canadian exploration, mapping, navigation and transportation have exploited state-of-the-art precise time systems.

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Tunnels

Unlike other mountainous countries such as Switzerland, and despite its size, Canada is not distinguished by well-known tunnels.

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Immunology

Immunology is a branch of MEDICINE that studies the body's ability to defend itself from foreign substances, cells and tissues, especially DISEASE-causing organisms, and seeks means of controlling that ability.