temperature photoluminescence (PL, Jobin Yvon Horiba HR 800 UV) spectroscopy was employed to study the optical properties of the ZnO films using a He–Cd laser with a wavelength of 325 nm as the excitation source at a 20 mW power level.
3. Result and discussion
Fig. 1 shows the XRD patterns of all the samples. Fig. 1 (a) is the typical XRD pattern of ZnO films with a preferred C axis
and demand. First, certification can’t involve the process of use, because it is only given by the initial building design. So they have problem that can’t control environmental quality level change by utilizing of occupants. Also, they concentrate to physical factors for securement of environmental-friendly materials and skills and overlook the aspect of users in criteria. Like this, Green B
water environments, methane production begins immediately after the oxygen is depleted (Rice and Claypool, 1981). Species of anaerobic bacteria (those that don’t use oxygen) then reduce carbon dioxide and produce methane through anaerobic respiration (Rice and Claypool, 1981). When a coal’s temperature underground reaches about 122 degrees Fahrenheit, and after a sufficient amount of time, mo
According to the Global Environment Fund, the Gulf and Sea of Oman region is "one of the most important marine turtle habitats in the world and plays a significant role in sustaining the life cycle of the marine turtle populations in the whole North-Western Indo Pacific region" due to its shallow depth and high watertemperature. Of the seven species of marine turtles in the world five are found