Long-scale evolution of luminescent properties of water and glycyltryptophan solutions: influence of UV irradiation

Valentin I. Lobyshev

doi:10.1117/12.348362

17 May 1999 Long-scale evolution of luminescent properties of water and glycyltryptophan solutions: influence of UV irradiation

Valentin I. Lobyshev

Author Affiliations +

Proceedings Volume 3599, Optical Diagnostics of Biological Fluids IV; (1999) https://doi.org/10.1117/12.348362
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

Abstract

Distilled water possesses weak luminescence in the near UV and visible regions of the spectrum. Trace amounts of both luminescent and non-luminescent substances stimulate the emission of luminescence at both wavelengths 360 and 410 nm. The intensity of the 'short-wave' band in pure water is approximately ten times less, than the corresponding intensity in aqueous solution of glycyltryptophan with concentration about 0.006 mg/ml while the intensity of the'long-wave' band in pure water is only twice less than in the solution. Optical properties of stored samples of water and glycyltryptophan solutions change spontaneously during several days after preparation. These changes may be of monotonous and nonmonotonous (even oscillatory) character. Finally the system comes to a stable state which can either coincide with the initial state or differs from it. Changes in luminescent features under the influence of weak UV and X-ray radiation are also observed. The effect of external fields depends greatly on the phase state of solution, according to the spontaneous dynamics of solution, being the highest at non- equilibrium state. The duration and complexity of evolution of the luminescence spectra confirm the idea that water and aqueous solutions should be considered as non-equilibrium systems capable to self-organization.

Citation Download Citation

Valentin I. Lobyshev "Long-scale evolution of luminescent properties of water and glycyltryptophan solutions: influence of UV irradiation", Proc. SPIE 3599, Optical Diagnostics of Biological Fluids IV, (17 May 1999); https://doi.org/10.1117/12.348362

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available