We demonstrate the use of a double-beam optical tweezers system to stabilize red blood cell (RBC) orientation in the optical tweezers during measurements of elastic light scattering from the trapped cells in an angle range of 5-30 degrees. Another laser (He-Ne) was used to illuminate the cell and elastic light scattering distribution from the single cell was measured with a goniometer and a pho...

Low-level lasers are used at low power densities and doses according to clinical protocols supplied with laser devices or based on professional practice. Although use of these lasers is increasing in many countries, the molecular mechanisms involved in effects of low-level lasers, mainly on DNA, are controversial. In this study, we evaluated the effects of low-level red lasers on survival, fila...

Collagen, a triple helical protein with the primary role of mechanical function, provides tensile strength to the skin, and plays a pivotal task in tissue repair. During tissue regeneration, collagen level increases gradually and therefore, monitoring of such changes in vivo by laser induced fluorescence was the main objective behind the present study. In order to accomplish this, 15 mm diamete...

Single-color illumination of a copper surface by a red or an ultraviolet femtosecond laser pulse yields a threephoton (red) or a two-photon (UV) photoemission process. A multicolor, multiphoton process is generated when the red and the UV pulses overlap both in space and in time on the photocathode. It is shown that this emission process results from the absorption by an electron of one red and...

Helium-neon (He-Ne) laser has been used in many clinical fields, and caught our interest on cancer treatment. We conducted the study of He-Ne laser in lung cancer for the sake of the most common cause of cancer deaths worldwide, and up to 50% of the patients with advanced non-small-cell lung cancers with brain metastases. In this study, we used two human lung cancer cell lines A549, H1299, bron...

Granuloma faciale (GF) is a rare cutaneous disorder categorized as a localized form of small-vessel vasculitis. Clinically, it manifests as single or multiple well-demarcated red-brown plaques, papules and nodules, nearly always confined to the face. Herein, we report a 39-year-old man with multiple red-brown infiltrated plaques on face and extrafacial lesions on back, shoulders and both arms. ...

The plasma-laser star model for quasars, which is based on the hypotheses that there is no red shift in the spectra of quasars and that the strength of the emission lines is due to laser action, is further developed. Continuity is shown to exist between the spectra of 0 VI sequence planetary nuclei, Sanduleak stars, and 10 quasars. The 0 VI 11381 1, 3834 and He n 14686 emission lines in the spe...

A66-year-old white male with end-stage ischemic cardiomyopathy was referred to our center for transmyocardial laser revascularization (PLC Eclipse Surgical Technologies) in July 1999. The patient had a long history of interventions for his coronary artery disease, including multiple percutaneous transluminal coronary angioplasties, stent placement in 1991 and 1993, and coronary artery bypass gr...

background and objectives: accelerating wound healing is a very important factor for patients to return to ordinary life. laser seems to have positive effect on cutaneous wound healing. this study aimed to investigate the effect of red light laser 630 nm on cutaneous surgical wound in hamster and to compare outcomes such as angiogenesis, number of fibroblasts and collagen formation in intervent...