scholarly journals Diffusion of Methylene Blue in Phantoms of Agar Using Optical Absorption Techniques

10.5772/20589 ◽  
2011 ◽  
Author(s):  
Lidia Vilca-Quispe ◽  
Alejandro Castilla-Loeza ◽  
Juan Jose ◽  
Patricia Quintana-Owe
Keyword(s):  
Methylene Blue ◽  
Optical Absorption

Influence of Nucleic Acid Bases on the Light-induced Reduction of Methylene Blue: ESR and Optical Measurements

1973 ◽  
Vol 28 (1-2) ◽  
pp. 82-85 ◽  
Author(s):  
Helmut Hanssum ◽  
Wolfgang Lohmann
Keyword(s):  
Methylene Blue ◽  
Nucleic Acid ◽  
Optical Absorption ◽  
Electron Acceptors ◽  
Optical Measurements ◽  
Electron Affinities ◽  
Nucleic Acid Bases ◽  
Absorption Studies ◽  
Theoretical Predictions

The effect of the nucleic acid bases adenine, cytosine, thymine, uracil, and 5-bromo-uracil on the light-induced reduction of methylene blue in dimethylsulfoxide has been investigated by means of ESR and optical absorption studies. It could be shown that the nucleic acid bases act as electron acceptors. The experimentally obtained electron affinities are of the following order: cytosine > adenine > thymine ≈ uracil and confirm, thus, the theoretical predictions.

scholarly journals Visible Light Induced Photocatalytic Performance of Mn-Sno2@Zno Nanocomposite for High Efficient Cationic Dye Degradation

2021 ◽  
Author(s):  
S. Asaithambi ◽  
P. Sakthivel ◽  
M. Karuppaiah ◽  
V. Balaji ◽  
R. Yuvakkumar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Optical Absorption ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Energy State ◽  
Light Irradiation ◽  
High Efficient ◽  
Mn Doped

Abstract In this work, we have synthesized Mn-doped SnO2@ZnO nanocomposite for photo degradation of Methylene blue and Rhodamine B dyes upon visible light irradiation. The crystal structure, functional group, optical absorption, defect related emission, morphology, purity and binding energy state of synthesized samples were identified by using various analytical tools. The optical absorption shift and the reduction of band gap values are confirming the formation of hetero-junction of SnO2@ZnO composites. The Mn-SnO2@ZnO hetero-junction effectively induces the photo-generated charge carrier separation and enriches the charge transfer which helps in enhancing the photo-catalytic activities. The photocatalytic degradation results clearly indicate that the Mn-doped SnO2@ZnO nanocomposite has higher degradation efficiency of 98 % and 92 % for the Methylene blue and Rhodamine B dyes, respectively and is higher than the other synthesized samples. The present study reveals a low cost and highly efficient photo-catalyst which works up on visible light irradiation for the purification of waste water from industries.

scholarly journals Measurements of Optical Absorption Spectra under60Co-γ Irradiation. Aqueous Methylene Blue Solutions Containing Oxygen

1971 ◽  
Vol 44 (12) ◽  
pp. 3265-3268 ◽  
Author(s):  
Shin-ichi Ohno ◽  
Akihisa Sakumoto ◽  
Teikichi Sasaki ◽  
Kiyoshi Kawatsura ◽  
Katsutoshi Furukawa
Keyword(s):  
Methylene Blue ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Optical Absorption Spectra ◽  
Γ Irradiation

Photocatalysis of Columnar TiO2 Thin Films

2004 ◽  
Vol 849 ◽  
Author(s):  
Motofumi Suzuki ◽  
Kazuaki Kishimoto ◽  
Wataru Maekita ◽  
Kaoru Nakajima ◽  
Kenji Kimura
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Simple Model ◽  
Optical Absorption ◽  
Degradation Rate ◽  
Uv Light ◽  
Ultra Violet ◽  
Tio2 Thin Films ◽  
Interior Surface

ABSTRACTPhotocatalysis of oblique columnar TiO2 thin films has been investigated as a function of thickness using photobleaching of methylene blue (MB). The degradation rate of MB depends on the thickness of the films, although no significant differences in the columnar morphology, crystallinity and optical absorption are found. The relation between the degradation rate and the thickness is well described by a simple model, in which the degradation rate at a certain depth is proportional to the intensity of ultra violet (UV) light. The photocatalytic active thickness is estimated at approximately 200 nm. Thus the interior surface of the oblique columnar TiO2 thin films works well as photocatalyst.

Peculiarities of the nonlinear optical absorption of Methylene blue and Thionine in different solvents

2018 ◽  
Vol 149 ◽  
pp. 236-241 ◽  
Author(s):  
R.A. Ganeev ◽  
A.I. Zvyagin ◽  
O.V. Ovchinnikov ◽  
M.S. Smirnov
Keyword(s):  
Methylene Blue ◽  
Optical Absorption ◽  
Nonlinear Optical ◽  
Nonlinear Optical Absorption

A SEM and Light Microscope Study of the Epidermal Leaf Structures of the Carnivorous Plant, Sarracenia purpurea, L.

1971 ◽  
Vol 29 ◽  
pp. 358-359
Author(s):  
B. J. Panessa ◽  
J. F. Gennaro
Keyword(s):  
Methylene Blue ◽  
Toluidine Blue ◽  
Outer Surface ◽  
Microscope Study ◽  
Light Microscope ◽  
Carnivorous Plant ◽  
Sarracenia Purpurea ◽  
Inner Surface

Tissue from the hood and sarcophagus regions were fixed in 6% glutaraldehyde in 1 M.cacodylate buffer and washed in buffer. Tissue for SEM was partially dried, attached to aluminium targets with silver conducting paint, carbon-gold coated(100-500Å), and examined in a Kent Cambridge Stereoscan S4. Tissue for the light microscope was post fixed in 1% aqueous OsO4, dehydrated in acetone (4°C), embedded in Epon 812 and sectioned at ½u on a Sorvall MT 2 ultramicrotome. Cross and longitudinal sections were cut and stained with PAS, 0.5% toluidine blue and 1% azure II-methylene blue. Measurements were made from both SEM and Light micrographs.The tissue had two structurally distinct surfaces, an outer surface with small (225-500 µ) pubescent hairs (12/mm2), numerous stoma (77/mm2), and nectar glands(8/mm2); and an inner surface with large (784-1000 µ)stiff hairs(4/mm2), fewer stoma (46/mm2) and larger, more complex glands(16/mm2), presumably of a digestive nature.

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