Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

How irradiation in the visible and near-IR regions affects the mobility of ciliates

Not Accessible

Your library or personal account may give you access

Abstract

The action of low-intensity light on biological objects has been studied by estimating the mobility variation of the ciliate Paramecium caudatum Erhenberg, 1838. Using apparatus that makes it possible to measure the motion of the paramecia after they are irradiated by laser diodes (irradiation wavelength at 445, 662, and 808 nm) and by an LED (518 nm), speed variations were observed immediately after irradiation, having a strongly expressed oscillatory component, which is presumably explained by the action of self-regulation mechanisms. In the days following irradiation with energy density 1J/cm2 in the blue–green region, the speed of the ciliates increases by about a factor of 1.3 by comparison with a control experiment (with no irradiation). The mobility gradually decreases as the energy density of the irradiation increases, falling by a factor of 1.26 at 15J/cm2 (445 nm) and by a factor of 1.19 (518 nm). Irradiation with wavelength 662 nm has a similar effect, except that the stimulating effect is appreciably stronger (by a factor of 1.64 at 1J/cm2) while the suppression effect by a factor of 1.23 at 15J/cm2 is maintained. As far as the near-IR region is concerned (808 nm), the stimulation effect is present at all doses, demonstrating the greatest growth by a factor of 1.68 when the energy density is 15J/cm2.

© 2021 Optical Society of America

PDF Article
More Like This
Anti-inflammatory and cell proliferative effect of the 1270 nm laser irradiation on the BALB/c nude mouse model involves activation of the cell antioxidant system

Dinara Dolgova, Tatiana Abakumova, Tatiana Gening, Ludmila Poludnyakova, Igor Zolotovskii, Dmitrii Stoliarov, Andrei Fotiadi, Anna Khokhlova, Edik Rafailov, and Sergei Sokolovski
Biomed. Opt. Express 10(8) 4261-4275 (2019)

0.1 THz exposure affects primary hippocampus neuron gene expression via alternating transcription factor binding

Sen Shang, XingJuan Wu, Qi Zhang, Jiping Zhao, Erling Hu, Leilei Wang, and Xiaoyun Lu
Biomed. Opt. Express 12(6) 3729-3742 (2021)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved