PURPOSE Perceived color of ceramics changes by the spectral power distribution of ambient light. This study aimed to quantify the amount of shifts in color and color coordinates of clinically simulated seven all-ceramics due to the switch of three ambient light sources using a human vision simulating spectroradiometer. MATERIALS AND METHODS CIE color coordinates, such as L*, a* and b*,of cera...

The numbers of ultraviolet light (UV)-induced pyrimidine dimers in the DNA of neonatal BALB/c mouse skin were measured by assessing the sensitivity of the DNA to Micrococcus luteus UV endonuclease. Irradiation of neonatal BALB/c mice with FS40 sunlamps caused a dose-dependent induction of endonuclease-sensitive sites (pyrimidine dimers) in DNA extracted from back skin. Exposure of these UV-irra...

The level of rational use electricity consumption by households in Mozambique is very low. This paper assesses whether, with the implementation education and awareness actions through door-to-door method, possible to change habits rationalize residential Maputo city, Mozambique. data was collected questionnaires, observations, interviews related consumption, electrical equipment, household appl...

Many techniques exist to measure airborne volatile organic compounds (VOCs), each with differing advantages; sorbent sampling is compact, versatile, has good sample stability, and is the preferred technique for collecting VOCs for hygienists. Development of a desorption technique that allows multiple analyses per sample (similar to chemical desorption) with enhanced sensitivity (similar to ther...

This paper examines properties of compact fluorescent lamp (CFL) adoption in the Pacific Northwest and early adoption characteristics of light emitting diode lamps (LED) to glean similarities and differences. CFLs were the emerging technology in the 90’s competing against the dominant incandescent bulb. With the phase-out of incandescent bulbs due to Federal legislation (see EISA 2007), within ...

number of "ligfited sections" that comprise the l a m p intensity requirements are somewhat higher for lamps with more sections, partially adjusting for the presumably larger lighted area of a lamp with more sections, and thereby establishing some control of luminance. The number of sections is used as a proxy for area, based on the assumption that lamps will be constructed with optical units o...

Rapid development in electrical technology has imposed strong challenges to modern power system. Power quality become a great concern due proliferation of electronic loads. Specifically for lighting load such as compact fluorescent lamps (CFLs), one the concerning issues is harmonics. CFL cost-competitive and energy efficient compared incandescent lamp. Inevitably, produces harmonics current no...