Influence of different sized nanoparticles combined with ultrasound on the optical properties ofin vitronormal and cancerous human lung tissue studied with OCT and diffuse reflectance spectra

The optical properties of phenazine, 5,10-dihydrophenazine, 1: 1 phenazhydrin, and 3: 1 phenazhydrin have been investigated, and ir, uv, and diffuse reflectance spectra are reported. The ir data indicate that the structures of the phenazhydrins resemble those of the parent compounds. The uv spectrum of 5,10-dihydrophenazine has a Λmax at 350 nm, which is not in agreement with a previously reported value of 325 nm. Absorption spectra of the reduced phenazine were also obtained via diffuse reflectance and a subtraction technique. Absorption in the visible region which is not present in the solution spectra is observed in the diffuse reflectance spectra of the phenazhydrins. The optical spectra of the four related compounds are collectively presented and discussed.

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Study on the Effect of Blood Content on Diffuse Reflectance Spectra of Basal Cell Carcinoma Skin Tissue

The Scientific World JOURNAL ◽

10.1155/2013/192495 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Miaoqing Nan ◽

Qingli He

Keyword(s):

Optical Properties ◽

Basal Cell Carcinoma ◽

Cell Carcinoma ◽

Basal Cell ◽

Optical Model ◽

Diffuse Reflectance ◽

Reflectance Spectra ◽

Skin Tissue ◽

Experimental Result ◽

Diffuse Reflectance Spectra

Diffuse reflectance spectrum as a noninvasive method has been widely used to study the optical properties of cutaneous skin tissue. In this work, we optimized an eight-layered optical model of basal cell carcinoma skin tissue to study its optical properties. Based on the model, the diffuse reflectance spectra were reconstructed in visible wavelength range by Monte Carlo methods. After different blood contents were added to the optical model, the contribution of blood to diffuese reflectance spectra was investigated theoretically. The ratios of basal cell carcinoma skin and normal skin tissue were also calculated for both experimental result and rebuilt results to testify the theoretical reasonability of the model and methods.

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Sequential estimation of optical properties of a two-layered epithelial tissue model from depth-resolved ultraviolet-visible diffuse reflectance spectra

Applied Optics ◽

10.1364/ao.45.004776 ◽

2006 ◽

Vol 45 (19) ◽

pp. 4776 ◽

Cited By ~ 53

Author(s):

Quan Liu ◽

Nirmala Ramanujam

Keyword(s):

Optical Properties ◽

Diffuse Reflectance ◽

Sequential Estimation ◽

Reflectance Spectra ◽

Epithelial Tissue ◽

Tissue Model ◽

Diffuse Reflectance Spectra

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Effects of mechanical indentation on diffuse reflectance spectra, light transmission, and intrinsic optical properties in ex vivo porcine skin

Lasers in Surgery and Medicine ◽

10.1002/lsm.22018 ◽

2012 ◽

Vol 44 (4) ◽

pp. 303-309 ◽

Cited By ~ 4

Author(s):

William C. Vogt ◽

Alondra Izquierdo-Román ◽

Brandon Nichols ◽

Liang Lim ◽

James W. Tunnell ◽

...

Keyword(s):

Optical Properties ◽

Diffuse Reflectance ◽

Light Transmission ◽

Ex Vivo ◽

Reflectance Spectra ◽

Porcine Skin ◽

Diffuse Reflectance Spectra

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Mast Cell Heterogeneity in Human Lung Tissue

Clinical Science ◽

10.1042/cs0770297 ◽

1989 ◽

Vol 77 (3) ◽

pp. 297-304 ◽

Cited By ~ 10

Author(s):

F. J. Van Overveld ◽

L. A. M. J. Houben ◽

F. E. M. Schmitz du Moulin ◽

P. L. B. Bruijnzeel ◽

J. A. M. Raaijmakers ◽

...

Keyword(s):

Mast Cell ◽

Mast Cells ◽

Alcian Blue ◽

Lung Tissue ◽

Human Lung ◽

Immunoglobulin E ◽

Prostaglandin D2 ◽

Leukotriene C4 ◽

Human Lung Tissue ◽

No Release

1. In this study mast cells were found to comprise 2.1% of total cells recovered by enzymatic digestion of human lung tissue. 2. This mast cell population consisted of 79% formalin-sensitive, Alcian Blue-positive mast cells and 21% formalin-insensitive, Alcian Blue-positive mast cells. 3. By the use of centrifugal elutriation and subsequent Percoll gradient centrifugation, separate mixed cell populations could be obtained in which the mast cell constituents were either of the formalin-sensitive or -insensitive type. 4. Cell suspensions in which formalin-sensitive cells comprised 97% of mast cells contained approximately 1.34 pg of histamine per mast cell, whereas in preparations in which mast cells were 84% formalin-resistant the histamine content was approximately 4.17 pg of histamine per mast cell. 5. The histamine release upon anti-immunoglobulin E challenge of formalin-sensitive mast cells was greater than the release by formalin-insensitive mast cells. 6. After challenge with opsonized zymosan, only formalin-sensitive mast cells were able to release histamine. 7. Leukotriene C4 release was observed when formalin-sensitive mast cells were challenged with antiimmunoglobulin E. Formalin-insensitive mast cells showed no release of leukotriene C4. 8. Prostaglandin D2 release was observed when formalin-insensitive mast cells were challenged with antiimmunoglobulin E. Formalin-sensitive mast cells showed no release of prostaglandin D2.

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