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| Issa,Joáo Paulo Mardegan; Tiossi,Rodrigo; Mello,Amaro Sergio da Silva; Iyomasa,Mamie Mizusaki. |
| The skeleton has several important functions, such as structural functions that provide mobility, support, and protection for the body. It also has an important function as a reservoir for calcium and phosphorus. The aim of this article is to show the principal hormones that are involved with the bone healing process. In this article, it will be pointed the mineral homeostatic mechanisms in the skeleton, controlled by the calcium-regulating hormones: parathyroid hormone (PTH) that maintains the normal extracellular calcium levels by enhancing osteoclastic bone resorption and liberating calcium from the adult skeleton; estrogen, considering that both osteoblasts and osteoclasts express estrogen receptors, it is reasonable to assume that the effects of... |
| Tipo: Journal article |
Palavras-chave: Bone; Repair; Hormones. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200025 |
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| Ando, Amy Whritenour; McConnell, Virginia D.; Harrington, Winston. |
| The Arizona I/M program provides one of the first opportunities to examine the costs and effectiveness of vehicle emission repair. This paper examines various aspects of emission reductions, fuel economy improvements, and costs of repair, drawing data from over 80,000 vehicles failing the I/M test in Arizona between 1995 and the first half of 1996. We summarize the wealth of repair data from the Arizona program and highlight its limitations. Because missing or incomplete cost information has been a serious shortcoming for evaluation of I/M programs, we develop a method for estimating the costs of repair when those costs are not reported. We find surprising evidence that almost one quarter of all vehicles that take the I/M test are never observed to pass... |
| Tipo: Working or Discussion Paper |
Palavras-chave: I/M; Repair; Emissions; Mobile sources; Environmental Economics and Policy; Q25; R48. |
| Ano: 1999 |
URL: http://purl.umn.edu/10915 |
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