Changes in hydroxyproline content of human dermal collagen following UV-irradiation in vitro

1969 ◽  
Vol 25 (6) ◽  
pp. 624-624 ◽  
Author(s):  
W. P. Raab
Keyword(s):  
Uv Irradiation ◽  
Hydroxyproline Content ◽  
Dermal Collagen ◽  
Human Dermal Collagen

scholarly journals Bleaching of chlorophylls by UV irradiation in vitro: The effects on chlorophyll organization in acetone and n-hexane

2008 ◽  
Vol 73 (3) ◽  
pp. 271-282 ◽  
Author(s):  
Jelena Zvezdanovic ◽  
Dejan Markovic
Keyword(s):  
Uv Irradiation ◽  
Photosynthetic Pigments ◽  
Energy Input ◽  
First Order ◽  
First Order Kinetics ◽  
Uv Photons ◽  
The Stability ◽  
Major Factors

The stability of chlorophylls toward UV irradiation was studied by Vis spectrophotometry in extracts containing mixtures of photosynthetic pigments in acetone and n-hexane. The chlorophylls underwent destruction (bleaching) obeying first-order kinetics. The bleaching was governed by three major factors: the energy input of the UV photons, the concentration of the chlorophylls and the polarity of the solvent, implying different molecular organizations of the chlorophylls in the two solvents.

Autofluorescence of human epidermis under UV irradiation in vitro

1997 ◽  
Author(s):  
Svetlana P. Chernova ◽  
Alexander B. Pravdin ◽  
E. V. Bukatova
Keyword(s):  
Uv Irradiation ◽  
Human Epidermis

In vitro biocompatibility and bacterial adhesion of physico-chemically modified Ti6Al4V surface by means of UV irradiation

2009 ◽  
Vol 5 (1) ◽  
pp. 181-192 ◽  
Author(s):  
A GALLARDOMORENO ◽  
M PACHAOLIVENZA ◽  
L SALDANA ◽  
C PEREZGIRALDO ◽  
J BRUQUE ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
Bacterial Adhesion ◽  
Chemically Modified ◽  
In Vitro Biocompatibility

Differential Regulation of the AP-1 Family Members by UV Irradiation In Vitro and In Vivo

1998 ◽  
Vol 10 (3) ◽  
pp. 191-195 ◽  
Author(s):  
Kirsi Isoherranen ◽  
Jukka Westermarck ◽  
Veli-Matti Kähäri ◽  
Christer Jansén ◽  
Kari Punnonen
Keyword(s):  
Uv Irradiation ◽  
Family Members ◽  
Differential Regulation

Human dermal collagen allografts: a three year histological study

1982 ◽  
Vol 35 (4) ◽  
pp. 519-523 ◽  
Author(s):  
Richard W. Griffiths ◽  
Peter G. Shakespeare
Keyword(s):  
Histological Study ◽  
Dermal Collagen ◽  
Human Dermal Collagen

Biomimetic Bone-Like Apatite Coating on Anodised Titanium in Simulated Body Fluid under UV Irradiation

2017 ◽  
Vol 888 ◽  
pp. 251-255 ◽  
Author(s):  
T.C. Lee ◽  
Pramod Koshy ◽  
Hasan Zuhudi Abdullah ◽  
M.I. Idris
Keyword(s):  
Uv Irradiation ◽  
Uv Light ◽  
Light Treatment ◽  
Disodium Salt ◽  
Apatite Formation ◽  
Oh Groups ◽  
Uva Irradiation ◽  
Apatite Coating ◽  
Titanium Foils

Low temperature deposition techniques of bioceramics coatings are now being researched and developed to avoid deficiencies inherent in high temperature techniques. Biomimetic coatings is a solution-based method conducted at ambient temperature to deposit bioactive coatings on the surface. The current study aims to investigate the effect of ultraviolet (UV) irradiation on the coating of bone-like apatite on the anodised surface. High purity titanium foils were anodised with an applied voltage of 350 V, current density of 70 mA.cm-2 in mixture of 0.04 M β-glycerophosphate disodium salt pentahydrate (β-GP) and 0.4 M calcium acetate (CA) for 10 min. After anodic oxidation, UV light treatment was conducted in pH-adjusted distilled water for 12 hours with ultraviolet light A (UVA) irradiation. Subsequently, the UV-treated anodised titanium foils were soaked in SBF for 7 days with/without UVA irradiation. After SBF immersion for 7 days, anodised titanium with combination of UV light treatment and UV irradiation during in vitro testing was fully covered by highly crystalline bone-like apatite at maximal thickness of 2.8 μm. This occurred mainly due to the formation of large amounts of Ti-OH groups which act as nucleation sites for bone-like apatite. This study also revealed that UV irradiation during in vitro testing is superior in promoting growth of bone-like apatite compared to UV light treatment. The suggested mechanism for bone-like apatite formation on anodised titanium under different UV irradiation conditions is illustrated in this article. The findings of this study indicated that biomimetic bone-like apatite coating with assistance of UV irradiation is an effective method in accelerating the formation of bone-like apatite.

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