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The s and s were, in essence, the golden age of Chemical Valley, says West, with Sarnians boasting the highest standard of living in Canada. In keeping with its contribution to the Canadian economy, Polymer Corp. Then, an oil embargo by Arab petroleum-producing states shook global markets. Sarnia adapted to the new challenges.

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Several companies: Polymer Corp. Union Carbide also built a polyethylene plant, DuPont doubled the capacity of its polyethylene plant and Shell Chemical started to produce isopropyl alcohol and polypropylene plastic, Stephenson wrote.

An Introduction to Molybdenum

Aerial view of the petrochemical plant at the Imperial Oil refinery in Eventually, however, by the late s to s, refineries in Sarnia began to close due largely to increased automation and outsourcing. A TransAlta pipeline bringing ethylene from Alberta was shut down.

This, says West, was another major catalyst, causing Dow Chemical in Sarnia to permanently lock the factory gates.

Steel Alloys: The Year in Review for Vanadium, Chromium and Molybdenum

In order to stop further decline in the petrochemical industry, West and fellow board members of the Canadian Chemical Producers Association realized in the early part of the new millennium that action was needed. There is a nice infrastructure ecosystem there, not only plants but maintenance and testing companies. Today, the Sarnia-Lambton Petrochemical and Refining Complex still has 19 petrochemical plants that continue to produce products made from crude oil, natural gas, natural gas liquids and ethane that is brought in via pipeline.

There are just too many drivers that affect it — too many people who rely upon the products that come out of that industry. Sarnia may have been the epicentre of the petrochemical industry but Shawinigan, Que. Shawinigan saw many national firsts: it was the first to produce aluminum in and the first to produce carborundum in After the war, research focused on developing chemicals for civilian use, including vinyl resins for use in plastics and adhesives. The company also made plastics, stainless steel and alloys for use in the mining and metallurgical industries. Over the next decades, Shawinigan Chemicals bought or entered into joint ventures with chemical manufacturing and marketing companies from around the world.

It was bought out in the mids by Gulf Oil Corp.

Translation of «몰리브덴» into 25 languages

The s saw a marked decline in the electrochemical industry. Today the city is focused on diversifying into areas like green technologies, software development and metal and mineral processing. It partners with Western University and the City of Sarnia to develop alternative energy technologies and industrial bio-products, forming a cluster of about 10 biochemistry companies as a complement to the petrochemical economy. This, McLaughlin says, is the development of bio-based chemical innovation that focuses on green technologies — building a sustainable industry around the petrochemical plants.

McLaughlin says that having a bio-based industry in place is helping reduce greenhouse gas and carbon dioxide emissions among all 19 petrochemical companies in Chemical Valley. He points to BioAmber, which uses plant-based sugars to make succinic acid in lieu of petroleum-based succinic acid. The shock of cold water cracked the granite along fracture planes into brick-shaped pieces that could be stacked without the need for mortar to secure them.

Millions upon millions of these pieces were produced in the plains below and hauled up the hill, as the city constantly expanded. The function of its massive, non-supportive walls have various interpretations: some believe they were martial and defensive, or that they were a symbolic show of authority, designed to preserve the privacy of royal families and set them apart from commoners. In his search for signs that the city had been created by white builders, layers of archeological deposits up to four metres deep were lost. Reconstruction attempts by Zimbabwe nationalists since have caused further damage — as have some of the roughly 20, tourists who visit the site every year, climbing the walls for thrills and to find souvenirs.

Political and ideological battles have also been fought over the ruins. Yet much is still to be known about the ancient capital city.

Designated a Unesco World Heritage Site in , the preservation of Great Zimbabwe — led by the National Museums and Monuments of Zimbabwe organisation — is now challenged by uncontrolled growth of vegetation, which threatens the stability of its dry stone walls. The spread of lantana , an invasive flowering shrub introduced to Zimbabwe in the early 20th century, has put added of strain on the preservation work. F ollow Guardian Cities on Twitter and Facebook to join in the discussion.

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Great Zimbabwe map Today, the ruins of Great Zimbabwe are a shell of the abandoned city that Captain Pegado came across — due in no small part to the frenzied plundering of the site at the turn of the 20th century by European treasure-hunters, in search of artefacts that were eventually sent to museums throughout Europe, America and South Africa. Facebook Twitter Pinterest. Topics Cities Lost cities.

몰리브덴 - Definition and synonyms of 몰리브덴 in the Korean dictionary

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