this study was investigate the effects of two levels of metabolism energy (me) and length of fattening periods on performance and growth characteristics of chalishtori male lambs. 64 ram lambs were weaning and intake diets with two levels of energy include: 2.5 and 2.3 mcal me/kg dm in 90 and 120 days fattening period. in this study used of completely random designs with 2×2 factorial methods (...

in islamic republic of iran, the heating and cooling of buildings account for approximately 40% of total energy use. from the entire energy loss taking place in a building, one third of that energy loss occurs through the windows. many of today’s existing buildings are not energy efficient, and consume more energy than is needed in order to make the working and living environments comfortable. ...