scholarly journals Biostimulating Action of Low-Intensity Monochromatic Visible Light: Is it Possible?

1984 ◽  
Vol 5 (1) ◽  
pp. 19-25 ◽  
Author(s):  
T. I. Karu ◽  
O. A. Tiphlova ◽  
G. E. Fedoseyeva ◽  
G. S. Kalendo ◽  
V. S. Letokhov ◽  
...  
Keyword(s):  
Visible Light ◽  
Hela Cells ◽  
Red Light ◽  
Monochromatic Light ◽  
Action Spectrum ◽  
Exponential Growth Phase ◽  
E Coli ◽  
Low Intensity ◽  
Quantitative Studies ◽  
Saccharomycodes Ludwigii

The quantitative studies with organisms of different complexity (HeLa cells, yeast organisms, E coli bacteria) to prove or disprove the stimulating action of low-intensity visible light are presented. The stimulation of DNA synthesis in HeLa cells was observed for four spectral intervals with maxima at near 400, 620, 680 and 760 nm. The red light stimulates the growth of yeast (Saccharomycodes ludwigii) and E coli in exponential growth phase. The action spectrum of monochromatic light on the growth of these organisms in the red region is very similar to that for HeLa cells.

Biostimulation of HeLa cells by low-intensity visible light

1984 ◽  
Vol 3 (2) ◽  
pp. 319-325 ◽  
Author(s):  
T. J. Karu ◽  
G. S. Kalendo ◽  
V. S. Letokhov ◽  
V. V. Lobko
Keyword(s):  
Visible Light ◽  
Hela Cells ◽  
Low Intensity

Biostimulation of HeLa cells by low-intensity visible light

1985 ◽  
Vol 5 (6) ◽  
pp. 483-496 ◽  
Author(s):  
T. I. Karu ◽  
V. S. Letokhov ◽  
V. V. Lobko
Keyword(s):  
Visible Light ◽  
Hela Cells ◽  
Low Intensity

Biostimulation of Hela cells by low-intensity visible light

1984 ◽  
Vol 3 (2) ◽  
pp. 309-318 ◽  
Author(s):  
T. J. Karu ◽  
G. S. Kalendo ◽  
V. S. Letokhov ◽  
V. V. Lobko
Keyword(s):  
Visible Light ◽  
Hela Cells ◽  
Low Intensity

Biostimulation of HeLa cells by low-intensity visible light

1982 ◽  
Vol 1 (6) ◽  
pp. 828-840 ◽  
Author(s):  
T. I. Karu ◽  
G. S. Kalendo ◽  
V. S. Letokhov ◽  
V. V. Lobko
Keyword(s):  
Visible Light ◽  
Hela Cells ◽  
Low Intensity

Use of Uranium-Labeled Antibodies for Electron Microscopic Localization of Various Antigens in Mammalian Cells

1967 ◽  
Vol 25 ◽  
pp. 136-137
Author(s):  
J. P. Petrali ◽  
E. J. Donati ◽  
L. A. Sternberger
Keyword(s):  
Endoplasmic Reticulum ◽  
Hela Cells ◽  
Mammalian Cells ◽  
Specific Antiserum ◽  
Electron Microscopic ◽  
E Coli ◽  
Cytoplasmic Membranes ◽  
Viral Progeny ◽  
Ultrathin Sections ◽  
Electron Microscopic Localization

Specific contrast is conferred to subcellular antigen by applying purified antibodies, exhaustively labeled with uranium under immunospecific protection, to ultrathin sections. Use of Seligman’s principle of bridging osmium to metal via thiocarbohydrazide (TCH) intensifies specific contrast. Ultrathin sections of osmium-fixed materials were stained on the grid by application of 1) thiosemicarbazide (TSC), 2) unlabeled specific antiserum, 3) uranium-labeled anti-antibody and 4) TCH followed by reosmication. Antigens to be localized consisted of vaccinia antigen in infected HeLa cells, lysozyme in monocytes of patients with monocytic or monomyelocytic leukemia, and fibrinogen in the platelets of these leukemic patients. Control sections were stained with non-specific antiserum (E. coli).In the vaccinia-HeLa system, antigen was localized from 1 to 3 hours following infection, and was confined to degrading virus, the inner walls of numerous organelles, and other structures in cytoplasmic foci. Surrounding architecture and cellular mitochondria were unstained. 8 to 14 hours after infection, antigen was localized on the outer walls of the viral progeny, on cytoplasmic membranes, and free in the cytoplasm. Staining of endoplasmic reticulum was intense and focal early, and weak and diffuse late in infection.

scholarly journals Fabrication of AgCl/Ag3PO4/graphitic carbon nitride heterojunctions for enhanced visible light photocatalytic decomposition of methylene blue, methylparaben and E. coli

RSC Advances ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 6383-6394 ◽  
Author(s):  
Haishuai Li ◽  
Linlin Cai ◽  
Xin Wang ◽  
Huixian Shi
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Decomposition ◽  
E Coli ◽  
Visible Light Photocatalytic

A noval ternary nanocomposite AgCl/Ag3PO4/g-C3N4 was successfully synthesized for photocatalytic degradation of methylene blue, methylparaben and inactivation of E. coli under visible light irradiation, showing excellent photocatalytic degradation performance and stability.

scholarly journals Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Chun-Hung Huang ◽  
Yu-Ming Lin ◽  
I-Kai Wang ◽  
Chun-Mei Lu
Keyword(s):  
Visible Light ◽  
Carbon Number ◽  
Red Light ◽  
Matrix Material ◽  
Carbon Sources ◽  
Impregnation Method ◽  
Light Spectrum ◽  
Precursor Molecule ◽  
Visible Light Active ◽  
Carbonate Species

A variety of carbon-modified titania powders were prepared by impregnation method using a commercial available titania powder, Hombikat UV100, as matrix material while a range of alcohols from propanol to hexanol were used as precursors of carbon sources. Rising the carbon number of alcoholic precursor molecule, the modified titania showed increasing visible activities ofNOxphotodegradation. The catalyst modified with cyclohexanol exhibited the best activities of 62%, 62%, 59%, and 54% for the totalNOxremoval under UV, blue, green, and red light irradiation, respectively. The high activity with long wavelength irradiation suggested a good capability of photocatalysis in full visible light spectrum. Analysis of UV-visible spectrum indicated that carbon modification promoted visible light absorption and red shift in band gap. XPS spectroscopic analysis identified the existence of carbonate species (C=O), which increased with the increasing carbon number of precursor molecule. Photoluminescence spectra demonstrated that the carbonate species suppressed the recombination rate of electron-hole pair. As a result, a mechanism of visible-light-active photocatalyst was proposed according to the formation of carbonate species on carbon-modified TiO2.

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