Neutral atomic sodium and chlorine emissions from cleaved, single-crystal NaCl 100 surfaces due to pulsed, 248-nm excimer laser irradiation have been characterized by time-resolved, quadrupole mass spectroscopy. At laser fluences below the threshold for optical breakdown, the resulting time-of-flight signals are consistent with particles emitted in thermal equilibrium with a laser-heated surfac...

We report on spectroscopy and time-of-flight measurements using an 18 keV fast-pulsed photoelectron source of adjustable intensity, ranging from single photoelectrons per pulse to 5 photoelectrons per μs at pulse repetition rates of up to 10 kHz. Short pulses between 40 ns and 40μs in length were produced by switching light emitting diodes with central output wavelengths of 265 nm and 257 nm, i...

Dye-doped cholesteric liquid crystal (CLC) behaves like a one-dimensional photonic crystal laser when pumped by a second harmonic Nd-YAG pulsed laser. Usually circularly polarized laser light in the same sense as the cholesteric helix is emitted from both directions of the lasing cell. In this paper, we experimentally demonstrate the laser emission enhancement and investigate the corresponding ...

BACKGROUND AND OBJECTIVES Infantile hemangiomas are the most common benign tumor in children. They have 3 phases of development: a proliferative phase, an involuting phase, and involution. Although active treatment is often not required, it is necessary in some cases. Of the possible treatments for hemangiomas, lasers have been shown to be effective in all phases of development. We report our e...

BACKGROUND Sclerotherapy has traditionally been considered the gold standard of treatment for leg veins, but patient fear of multiple needle injections and side effects of treatment have fueled investigation into other treatment alternatives. As a result, vascular-specific laser and light sources have been developed in an effort to treat these vessels with minimal morbidity and improved efficac...

This multi-author textbook with contributions of 59 authors from India, USA, Singapore, Saudi Arabia, Qatar, Thailand, and Oman aims to be a guide for those who are about to develop their own laser clinic, for beginners and experienced laser users. The Textbook of Laser in Dermatology comes in a fresh layout that makes reading joyful. It is a book for practice. I am sure that it won’t fix dust ...

background and aims: despite the screening of blood donors, blood transfusion represents an ideal port of entry for blood-borne infection. blood-borne pathogen transmission has been a concern since the earliest days of transfusion. the blood product of platelet (plt) concentrates is still faced with the risk of bacterial and viral contaminations. pathogen inactivation technologies offer a proac...

the effects of uv-c illumination at the dosage of 6.6 kj m-2 on postharvest quality of mango fruit cv. ‘kaew kamin’ during storage at 25 or 12°c were investigated. the changes in fresh weight, texture, ripening index (ri), peel and pulp colours, visual appearance, total carotenoids (tc) and ascorbic acid (asa) content were determined on days 0, 4, 8, 12 and 16 of storage. uv-c irradiation effec...

Silicon carbide (SiC) detectors of an Ni/4H-SiC Schottky diode structure and with sensitive areas of 1-4 cm² were fabricated using high-quality lightly doped epitaxial 4H-SiC material, and were tested in the detection of alpha particles and pulsed X-rays/UV-light. A linear energy response to alpha particles ranging from 5.157 to 5.805 MeV was obtained. The detectors were proved to have a low da...