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Outside the stele lies the endodermis, which is the innermost cell layer of the cortex. The concept of the stele was developed in the late 19th century by French botanists P. E. L. van Tieghem and H. Doultion as a model for understanding the relationship between the shoot and root, and for discussing the evolution of vascular plant morphology. [2]
The stele of plants undergoing secondary growth is surrounded by a vascular cambium, a ring of meristematic cells which produces more xylem on the inside and phloem on the outside. Since xylem cells comprise dead, lignified tissue, subsequent rings of xylem are added to those already present, forming wood.
Vizag Steel Plant is the only Indian shore-based steel plant and is situated on 33,000 acres (13,000 ha), and is poised to expand to produce up to 20 MT in a single campus. Turnover in 2011-2012 was Rs 14,457 crores. [6] On 20 May 2009, Prime Minister Manmohan Singh launched the expansion project of Visakhapatnam Steel Plant from a capacity of ...
Steel is an alloy composed of between 0.2 and 2.0 percent carbon, with the balance being iron. From prehistory through the creation of the blast furnace, iron was produced from iron ore as wrought iron, 99.82–100 percent Fe, and the process of making steel involved adding carbon to iron, usually in a serendipitous manner, in the forge, or via the cementation process.
Steel is made from iron and carbon. Cast iron is a hard, brittle material that is difficult to work, whereas steel is malleable, relatively easily formed and versatile. On its own, iron is not strong, but a low concentration of carbon – less than 1 percent, depending on the kind of steel – gives steel strength and other important properties.
Finished steel products are distributed by sea, road, and rail. Approximately 1.2 million tonnes of raw steel is [when?] produced in the steelworks each year, with about 65% of that transferred by rail to Market Mills as billets for further processing. The balance of the steel is then converted to finished products at the Whyalla Rolling Mill.
The company was renamed U.S. Steel Canada Inc., and its shares were delisted from the Toronto Stock Exchange. In an effort to streamline operations, U.S. Steel announced on March 3, 2009, that it would be temporarily shutting down its Hamilton plant and most of its Lake Erie plant, putting more than 2,000 people out of work.
POSCO (formerly Pohang Iron and Steel Company) is a South Korean steel manufacturer headquartered in Pohang, South Korea.It had an output of 42,000,000 metric tons (41,000,000 long tons; 46,000,000 short tons) of crude steel in 2015, making it the world's sixth-largest steelmaker by this measure. [2]