04/19/2014

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Protection Polyethylene Materials based on polyethylene foam appeared not so long ago. There are two basic types of polyethylene - the radiation crosslinked / chemically crosslinked / physically crosslinked / gas-filled. Most often in construction and packaging uses gas-filled polyethylene. Gas-filled foam is produced using the high-pressure polyethylene, various dyes and fire-fighting supplements / flame retardant / foam physical eg butane or its mixture with other gases. Proceedings of polyethylene for use in a wide range of temperatures /-60 C. to +80 C / up to 100% humidity. Foam has low thermal conductivity - 0.38 W / m C and at a thickness of 1 cm in its thermal conductivity is approximately equal to 7 cm pine timber or 14cm brickwork. Hardly inflammable, the ignition temperature is 306 C, and autoignition 417 C. Water absorption of about 0.6% of the total amount due to the structure of closed-cell foam. Foam does not rot, is not toxic, flammable, is used as the substrate under the laminate coating, as insulation water and sewage pipes / pipe shell / as packaging and cushioning material in furniture, electronic, glass and other industries. On the basis of polyethylene and aluminum foil was created heat-reflective insulation with unique characteristics. At a small thickness it has excellent heat reflection and thermal insulation properties. Currently, foil insulation is used as heat-reflective insulation in industrial and residential buildings, systems, hot and cold water, for air duct insulation, refrigerators, freezers. Foil insulation with adhesive provides ease of installation and allows its use on all surfaces cleaned from moisture, dust and dirt. Its application allows to achieve a good result for complex designs with angles, curves and drops. Used to insulation and sound insulation of refrigerators, cars, vans, marine and river vessels, containers, ventilation, air conditioning and exhaust systems. When protecting heat reflecting...
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Instituto State Snows (2003), still stand out aimportncia of fish during century XX when mentioning that in periods of they cheiaem that the ebb tides propitiated the intensification of fish, therefore had grandeconcentrao of shoals of fish, being this a time of fishes satiated and productive. Figure 04: Plantation of Pinusem a considerable area in the immediacy of Buritizeiro. Source: Souza, Uandes.14/09/2006 To long the dosanos the amount of fish diminished considerably, what she takes aospescadores abissal damage. To brighten up these damages; agencies as oInstituto State of Forests of Minas Gerais (IEF), Brazilian Institute of the Environment and Recursos Naturais Renovveis (IBAMA), has made not governmental fiscalizations and organizations and the civil prpriasociedade has made a work so that if it can assure conservaodo river. With intention to guarantee the survival dopeixe and the maintenance of the procreation of the species fishes, it passes at the time for umainterrupo of the Piracema, phase where the shoals of fish if dislocate river acimapara the reproduction, it is initiated in the period that if extends of November the February. During this period she is fishes forbidden it so that the fish in desovano phase are captured. In the period quedecorre the Piracema exists a quota for person who desires to fish that 5 kg of fish more exemplary u. It is allowed apesca in the modalities disembarked and embarked, in the rivers and reservoirs dabacia, using natural or artificial line of hand or pole, line and hook, reel or carretilha, with iscas. De1 of November the 30 of April is forbidden fishes it in the lagoons delinquents fishes, it until in the distance of one a thousand meters (1.000m), the sum and downstream of the barrages of reservoirs of usinashidreltricas, waterfalls and rapids. During this period the peixeno market can be supplied. (source)....