Results 121 to 130 of about 4,438 (266)

Spectroscopic analysis of bacterial photoreactivation

open access: yesPhotochemistry and Photobiology, Volume 101, Issue 2, Page 494-504, March/April 2025.
This study investigates the effectiveness of fluorescence and Raman spectroscopy in detecting bacterial photoreactivation. Fluorescence spectroscopy shows limitations, because the intense fluorescence of tryptophan and tyrosine masks fluorescence emitted by thymine molecules.
Keyvan Khosh Abady   +4 more
wiley   +1 more source

Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform

open access: yesClinical Ophthalmology, 2012
Anastasios John KanellopoulosDepartment of Ophthalmology, New York University Medical School, New York, NY, and LaserVision.gr Eye Institute, Athens, GreeceBackground: The purpose of this study was to evaluate the safety and efficacy of topography-guided
Kanellopoulos AJ
doaj  

Laser printing of certain pixels of graphene nanoribbons

open access: yesКомпьютерная оптика
A possibility of laser printing of graphene nanoribbon pixels while preserving the integrity of the structure and shape on the silicon substrate in accordance with the irradiated laser spot is demonstrated. To provide the transfer, a target consisting of
M.S. Komlenok   +3 more
doaj   +1 more source

Depth of DNA photodamage in human corneas exposed to 222 nm or 254 nm UV

open access: yesPhotochemistry and Photobiology, EarlyView.
Representative confocal 3D image of a section of a human cornea showing nuclei in blue (Hoechst 33342) and green, which was assigned to cells exhibiting Alexa555 conjugated to anti‐CPD antibody. The depth of photodamage was measured in Z‐stacks of the human corneal epithelium after exposure of the anterior surface to 50 or 100 mJ/cm2 at 222 or 254 nm ...
Manuela Buonanno   +6 more
wiley   +1 more source

Cis‐urocanic acid formation following far‐UVC exposure and associated signaling responses in keratinocytes

open access: yesPhotochemistry and Photobiology, EarlyView.
Far‐UVC (200–235 nm) has emerged as a safe and effective indoor disinfection tool, but effects on skin immunomodulation remain unclear. This study demonstrates that 222 nm far‐UVC converts trans‐urocanic acid (UCA) to its biologically active cis isomer at levels comparable with solar radiation. In keratinocytes, far‐UVC alone caused modest increases in
Lizzie Thomas   +4 more
wiley   +1 more source

Comparison of ablation efficacy of excimer, pulsed-dye, and holmium-YAG lasers relevant to shock waves.

open access: yes, 1992
Ablation efficacy of pulsed lasers on human arterial tissue and associated shock waves have been investigated by means of excimer laser at 308 nm, pulsed-dye laser at 480 nm, and holmium-YAG laser at 2.1 microns. A multifiber catheter was used for lasing
Tahk, SJ   +4 more
core   +1 more source

Resistless Etching of SiO2 by Two Color Excimer Lasers

open access: yes, 1991
Resistless etching of thermal oxide silicon filmes were demonstrated by ArF & KrF excimer lasers, and CC12F2 gases. CC12F2 was decomposed by ArF excimer laser light, and CF2 radicals were produced.
M. Murahara, T. Obara
core   +1 more source

Detection of a Target Nucleic Acid by Ligation‐Assisted Fluorescence Enhancement of a Peptide Nucleic Acid (PNA) Twin Probe via Disulfide Binding

open access: yesBiopolymers, Volume 117, Issue 4, July 2026.
Target‐induced disulfide ligation of PNA twin probes promotes pyrene excimer formation for nucleic acid detection. ABSTRACT The development of methods for detecting specific nucleic acids is important for early diagnosis and treatment of diseases at the genetic level.
Yutaka Ouchi   +9 more
wiley   +1 more source

Excimer Laser Technology

open access: yes, 2005
This comprehensive survey on Excimer Lasers investigates the current range of the technology, applications and devices of this commonly used laser source, as well as the future of new technologies, such as F2 laser technology.
Marowsky, Gerd, Basting, Dirk
core   +1 more source

EFFECTS OF ULTRAVIOLET RADIATION OF EXCIMER LASERS ON SCLERAL TISSUE OF THE HUMAN EYE (EXPERIMENTAL STUDY)

open access: yesОфтальмохирургия, 2015
Purpose. To study an effect of excimer laser with different wavelengths (248, 308 and 353nm) on sclera.Material and methods. For the experiment 3 laser units, generating radiation with wavelengths of 248, 308 and 353nm were created. There were determined
V. V. Chernykh   +6 more
doaj  

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