The photoablative products from human cadaver corneas treated with lasers were investigated using gas chromatography and mass spectroscopy. The photoablations were done separately with an excimer laser (193 nm) and with an erbium: yttrium aluminum garnet (Er:YAG) laser (2.94 microns). More than 20 different types of molecules with a molecular weight of 40-400 mass units could be identified, mos...

A liquid chromatographic (LC) determination of catecholamines and indoleamines is described. This is based on intramolecular excimer-forming fluorescence derivatization with 4-(1-pyrene)butanoyl chloride, followed by reversed-phase LC. The analytes, containing an amino moiety and phenolic hydroxyl moieties in a molecule, were converted to the corresponding polypyrene-labeled derivatives by one-...

There has been the unsubstantiated clinical impression that laser refractive surgery accelerates cataract development along with solid experimental data about the cataractogenic effects of excimer laser treatment. We present the first documented case of significant cataract formation in a young myope after repeat excimer laser ablation necessitating phacoemulsification with a posterior chamber ...

Background: Vitiligo is an acquired idiopathic disease that appears as skin depigmented patches due to a loss of melanocytes are responsible for producing melanin pigment in the skin, hair, mucous membranes and retina. Objective: To evaluate efficacy topical piperine oil combined with excimer light phototherapy treatment non-segmental vitiligo: comparative intra individual study. Patients metho...

Excimer laser plays an important role in economic production because of its short wavelength, high refrequency and large energy. In the output characteristics excimer lasers, beam quality energy stability are characters high-end light sources, whether pre-ionization process is developed sufficiently or not key to system pulses with stable This paper mainly aims at ArF laser, establishes one- di...

By Maria Clara Arbelaez, MD; and Thomas Magnago, Dipl-Ing Due to recent advances in refractive surgery, the complexities of correcting irregular astigmatism can now receive closer attention than ever before. Today, subjective evaluation of the patient’s refractive deficit may not produce an accurate depiction of his preexisting astigmatism. To minimize poor postoperative results, the golden rul...

A fluorescent probe was designed and shown to detect Cu2+ ratiometrically and selectively in aqueous solutions based on naphthalimide excimer-monomer switching.

Naphthalene diimide (NDI) bolaamphiphilic molecules (1) self-assemble in water to form organic nanoparticles, which exhibit self-assembly induced preassociated excimer formation and hence an enhanced green fluorescence.

The introduction of bulky tert-butyl substituents into smectic liquid-crystalline 9,10-bis(phenylethynyl)anthracene derivatives influences excimer structures and luminescence properties.

The recent trend in microelectronics towards patterning critical feature sizes of 0.25 m and below has motivated the development of microlithography at the deep ultra-violet (DUV) laser wavelengths of 248 and 1 93 nm. In recent years the performance, reliability, and cost of ownership of excimer light sources have improved. Some key technologies needed for excimer lasers in microlithography inc...