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Ice cancels flights, snarls traffic; snow in North Texas forecast

DALLAS (AP) — More wintry weather was expected across parts of North Texas through Wednesday.

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Berkshire Hathaway company acquires Fort Worth firm

M&M Manufacturing, a producer of sheet metal products for the air distribution and ventilation market based in Fort Worth, has been acquired by MiTek Industries Inc., a subsidiary of Warren Buffett’s Berkshire Hathaway Inc.,

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Plans for Grand Prairie indoor ski resort, Hard Rock Hotel evaporate

Plans for a $215 million indoor ski resort and Hard Rock Hotel in Grand Prairie have been shelved. Sherman Thurston, a member of the development team, sent a

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UPDATE: Six candidates file for two Water Board seats

Six candidates have filed for the two open seats on the Tarrant Regional Water Board, setting up a battle that could potentially shift the balance of power on the board and the priorities of one of the largest water districts in Texas.

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26-story mixed-use tower planned at Taylor & Fifth in downtown Fort Worth

Jetta Operating Co., a 24-year-old privately held oil and gas company in Fort Worth, and a related entity plan a 26-story mixed-use tower downtown at Taylor and Fifth streets on a site once owned by the Star-Telegram.

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Kyoto University to test new shale gas extraction method

The Yomiuri Shimbun.
TOKYO — A Kyoto University research team developed a new basic technology to extract shale gas trapped deep underground by injecting carbon dioxide into shale bedrock instead of water, The Yomiuri Shimbun has learned.

The research team said it plans to start a large-scale substantiative experiment to verify the technology in autumn, aiming for practical use of the technology within several years.

In addition to securing shale gas, a new energy resource, the newly developed technology is also expected to help combat global warming as it will confine CO2 underground.

A common method to extract shale gas is to frack hard shale bedrock by injecting pressurized water into shale formations. The more finely cracked the bedrock is, the more shale gas can be obtained. However, making ideal cracks in shale formations by injecting water is difficult because the liquid has a high viscosity.

According to the research team led by Kyoto University Professor Tsuyoshi Ishida and Assistant Professor Chen Youqing, CO2 becomes a "supercritical" fluid if it is heated to 31.1 C or more and subjected to pressure of at least 73 atmospheres. A supercritical fluid is very smooth and has properties midway between a liquid and gas.

The research team confirmed that supercritical CO2 injected into shale bedrock fractured the bedrock and created finer cracks more widely in comparison to the use of pressurized water.

Last autumn, Japan Oil, Gas and Metals National Corporation, an auxiliary organization of the Economy, Trade and Industry Ministry, designated the development of this technology as a research project.

In October, the university research team will start conducting a substantiative experiment to fracture granite, the hardness of which is similar to that of shale, in a hot spring area in Toyama Prefecture.

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