scholarly journals Growth and replication of red rain cells at 121°C and their red fluorescence

2010 ◽  
Author(s):  
Rajkumar Gangappa ◽  
Chandra Wickramasinghe ◽  
Milton Wainwright ◽  
A. Santhosh Kumar ◽  
Godfrey Louis
Keyword(s):  
Red Fluorescence ◽  
Red Rain

scholarly journals Red fluorescence of the triplefin Tripterygion delaisi is increasingly visible against background light with increasing depth

2017 ◽  
Vol 4 (3) ◽  
pp. 161009 ◽  
Author(s):  
Pierre-Paul Bitton ◽  
Ulrike K. Harant ◽  
Roland Fritsch ◽  
Connor M. Champ ◽  
Shelby E. Temple ◽  
...  
Keyword(s):  
Colour Vision ◽  
Red Light ◽  
Field Measurements ◽  
Light Environment ◽  
Natural Light ◽  
Ambient Light ◽  
Red Fluorescence ◽  
As Species ◽  
Tripterygion Delaisi ◽  
Red Coloration

The light environment in water bodies changes with depth due to the absorption of short and long wavelengths. Below 10 m depth, red wavelengths are almost completely absent rendering any red-reflecting animal dark and achromatic. However, fluorescence may produce red coloration even when red light is not available for reflection. A large number of marine taxa including over 270 fish species are known to produce red fluorescence, yet it is unclear under which natural light environment fluorescence contributes perceptively to their colours. To address this question we: (i) characterized the visual system of Tripterygion delaisi, which possesses fluorescent irides, (ii) separated the colour of the irides into its reflectance and fluorescence components and (iii) combined these data with field measurements of the ambient light environment to calculate depth-dependent perceptual chromatic and achromatic contrasts using visual modelling. We found that triplefins have cones with at least three different spectral sensitivities, including differences between the two members of the double cones, giving them the potential for trichromatic colour vision. We also show that fluorescence contributes increasingly to the radiance of the irides with increasing depth. Our results support the potential functionality of red fluorescence, including communicative roles such as species and sex identity, and non-communicative roles such as camouflage.

High-energy organic group-induced spectrally pure upconversion emission in novel zirconate-/hafnate-based nanocrystals

CrystEngComm ◽  
2015 ◽  
Vol 17 (37) ◽  
pp. 7169-7174 ◽  
Author(s):  
Xianghong He ◽  
Bing Yan
Keyword(s):  
Pump Power ◽  
Near Infrared ◽  
Incident Light ◽  
Upconversion Emission ◽  
High Energy ◽  
Single Band ◽  
Organic Group ◽  
Red Fluorescence

A series of novel fluoride-based nanophosphors (NPs) exhibiting spectrally pure upconversion (UC) red fluorescence upon near-infrared (980 nm) excitation. The single-band deep-red UC luminescence feature of K3MF7:Yb3+,Er3+ (M = Zr, Hf) NPs is independent of the doping levels of Yb3+–Er3+ and the pump power of incident light.

scholarly journals Generation of Cloned Transgenic Cats Expressing Red Fluorescence Protein1

2008 ◽  
Vol 78 (3) ◽  
pp. 425-431 ◽  
Author(s):  
Xi Jun Yin ◽  
Hyo Sang Lee ◽  
Xian Feng Yu ◽  
Eugene Choi ◽  
Bon Chul Koo ◽  
...  
Keyword(s):  
Red Fluorescence

FLUORESCENCE OF THE ERYTHROCYTES IN LEAD POISONING IN CHILDREN: AN AID TO RAPID DIAGNOSIS

PEDIATRICS ◽  
1959 ◽  
Vol 24 (5) ◽  
pp. 734-738
Author(s):  
Jo Anne Whitaker ◽  
Teresa J. Vietti
Keyword(s):  
Ultraviolet Light ◽  
Lead Poisoning ◽  
Reliable Method ◽  
Rapid Diagnosis ◽  
Red Fluorescence ◽  
Poisoning In Children ◽  
Clinical Conditions

In seven children with lead poisoning, a thin wet-preparation of erythrocytes was examined under ultraviolet light. In every case red fluorescence was found in 75 to 100% of the erythrocytes. The fluorescence appears to be related to the amount of free protoporphyrin in the erythrocytes. Over 150 preparations of erythrocytes from patients with a variety of other clinical conditions showed 0 to 50% fluorescent erythrocytes. This test is a simple, rapid, reliable method to aid in the diagnosis of lead poisoning in children.

Red fluorescence on the teeth of psoriatic patients

2003 ◽  
Vol 42 (7) ◽  
pp. 582-582
Author(s):  
Binnur Tuzun ◽  
Aylin Kalayciyan ◽  
Ronni Wolf ◽  
Deniz Kircuval ◽  
Nurcan Arzuhal ◽  
...  
Keyword(s):  
Red Fluorescence

scholarly journals Blue protein with red fluorescence

2016 ◽  
Vol 113 (41) ◽  
pp. 11513-11518 ◽  
Author(s):  
Swagatha Ghosh ◽  
Chi-Li Yu ◽  
Daniel J. Ferraro ◽  
Sai Sudha ◽  
Samir Kumar Pal ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Molecular Basis ◽  
Spectral Properties ◽  
Fluorescent Proteins ◽  
Protein A ◽  
Sander Vitreus ◽  
Ligand Complex ◽  
Red Fluorescence ◽  
Golden Yellow ◽  
Fish Mucus

The walleye (Sander vitreus) is a golden yellow fish that inhabits the Northern American lakes. The recent sightings of the blue walleye and the correlation of its sighting to possible increased UV radiation have been proposed earlier. The underlying molecular basis of its adaptation to increased UV radiation is the presence of a protein (Sandercyanin)–ligand complex in the mucus of walleyes. Degradation of heme by UV radiation results in the formation of Biliverdin IXα (BLA), the chromophore bound to Sandercyanin. We show that Sandercyanin is a monomeric protein that forms stable homotetramers on addition of BLA to the protein. A structure of the Sandercyanin–BLA complex, purified from the fish mucus, reveals a glycosylated protein with a lipocalin fold. This protein–ligand complex absorbs light in the UV region (λmax of 375 nm) and upon excitation at this wavelength emits in the red region (λmax of 675 nm). Unlike all other known biliverdin-bound fluorescent proteins, the chromophore is noncovalently bound to the protein. We provide here a molecular rationale for the observed spectral properties of Sandercyanin.

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