Introduction: Depression is a common psychiatric disorder and about one in five people experience depression during their lifespan. Despite the anti-depressive effects of drug therapy, problems such as non-targeting and dose-resistant lead to more effective approaches. Transcranial Photobiomodulation (TPBM) or transcranial low-level laser (TLLL) therapy is a novel and neuropro...

there is just one study about the effects of 830 nm low power laser (lpl) on conduction velocity of sural nerve in human. considering the fact that the sural nerve is a pure sensory nerve, therefore, for determining the effect of lpl on electrophysiological parameters of the nerve in human, this study was carried out as a base for further basic and clinical researches. thirty eight normal volun...

The use of high-power diode laser with a wavelength of 755 nm is an effective and safe method for the correction and partial and/or total elimination of pigmented lesions, specifically solar lentigines. This wavelength has yet not been used in diode lasers to treat solar lentigines. Side effects are the usual ones, including darkening and scab formation. Our patient was a 40-year-old woman of C...

The conversion or photo conversion of asphaltenes to polycyclic aromatic hydrocarbons (PAH’s) promoted by a laser source is analyzed using both experimental and theoretical methods. We propose that during measurements performed at an intermediate laser power, fragmentation to afford PAH’s and ring fusion to yield fused PAH’s (FPAH’s) may occur either within molecular clusters (resin case) or wi...

introduction: the purpose of this study was to investigate the effect of 6w power carbon dioxide laser (co2) on the biologic compatibility of the sandblasting with large grit and acid etching (sla) titanium discs through studying of the sarcoma osteogenic (saos-2) human osteoblast-like cells viability. methods: sterilized titanium discs were used together with saos-2 human osteoblast-like cells...

It is the output power and density of the lasers which determine whether a laser is a low or high-power one. If the density is less than 670mW/cm2, the laser is called a low power one. The output power of these lasers is usually less than 250mW. They use different mechanisms to accelerate wound healing such as: cellular biostimulation, improvement of circulation, vasodilation, analgesic and ant...

In this paper, we present a high accuracy laser range finder and velocimeter using ultra-fast time-to-digital converter (TDC). The system operation is based on the measuring the round-trip time of a narrow laser pulse. A low-dark current high-speed PIN photodiode is used to detect the triggered laser beam and to produce start signal. The pulsed laser diode generates 45W optical power at 30ns du...

the present article considers the nd:yag pulsed laser welding of 304 stainless steels with two different compositions. the effects of various laser operational parameters and cooling rates on the weld microstructures were considered. the results show that ferritic solidification is produced in the stainless steel with the creq/nieq ratio of 1.7, and austenitic solidification is produced in the ...

introduction: vitiligo is a cutaneous disorder of pigmentation, for which, there are some proven modalities of treatment. in this study, we evaluated the efficacy of the addition of topical pimecrolimus to 308nm excimer laser in reducing treatment duration and improving the response rate of eyelid vitiligo, compared with 308nm excimer laser monotherapy. methods: fifty two symmetrically localize...