scholarly journals The effect of elevated hydrostatic pressure on the spectral absorption of deep-sea fish visual pigments

2006 ◽  
Vol 209 (2) ◽  
pp. 314-319 ◽  
Author(s):  
J. C. Partridge
Keyword(s):  
Hydrostatic Pressure ◽  
Deep Sea ◽  
Visual Pigments ◽  
Spectral Absorption ◽  
Elevated Hydrostatic Pressure ◽  
Sea Fish

Single and multiple visual pigments in deep-sea fishes

1992 ◽  
Vol 72 (1) ◽  
pp. 113-130 ◽  
Author(s):  
J. C. Partridge ◽  
S. N. Archer ◽  
J. Vanoostrum
Keyword(s):  
Deep Sea ◽  
Visual Pigment ◽  
Short Wave ◽  
Visual Pigments ◽  
Outer Segments ◽  
Long Wave ◽  
Retinal Rods ◽  
Pigment Extract ◽  
Sea Fish

The visual pigments in the retinal rods of 17 species of deep-sea fish were examined by microspectrophotometry or visual pigment extract spectrophotometry. In 15 species single visual pigments were found with peak sensitivities between 470 and 490 nm, typical of deep-sea fishes. However, in one species, Stylephorons cordatus, two visual pigments were found with λ values at 470 and 481 nm. In another species, Scopelarchus analis, three visual pigments were found with mean λ values of 444, 479 and 505 nm. The short-wave pigment of this species was found both in main and accessory retinae. It was present both in single rods and in outer segments which had the most long-wave sensitive pigment in their distal parts. It is argued that these two-pigment rods are in the process of changing their visual pigment from a ‘juvenile’ VP505 pigment to an ‘adult’ VP444 pigment. The VP479 was found only as a single pigment in rods in the accessory retina.

scholarly journals Glutamine synthetase gene expression at elevated hydrostatic pressure in a deep-sea piezophilic Shewanella violacea

2000 ◽  
Vol 192 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Akihiko Ikegami ◽  
Kaoru Nakasone ◽  
Chiaki Kato ◽  
Yuka Nakamura ◽  
Ikuko Yoshikawa ◽  
...  
Keyword(s):  
Gene Expression ◽  
Hydrostatic Pressure ◽  
Glutamine Synthetase ◽  
Deep Sea ◽  
Glutamine Synthetase Gene ◽  
Elevated Hydrostatic Pressure ◽  
Shewanella Violacea

TMAO under High Hydrostatic Pressure

2021 ◽  
Author(s):  
Inga Kolling ◽  
Christoph Hölzl ◽  
Sho Imoto ◽  
Serena R. Alfarano ◽  
Hendrik Vondracek ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Hydrostatic Pressure ◽  
Ab Initio ◽  
Deep Sea ◽  
High Hydrostatic Pressure ◽  
Sea Fish

Trimethylamine N-oxide (TMAO) is a well-known osmolyte in nature, which deep-sea fish use to stabilize proteins against High Hydrostatic Pressure (HHP). We present a combined ab initio molecular dynamics, force...

The visual pigment of the conger eel

1958 ◽  
Vol 148 (931) ◽  
pp. 257-269 ◽  
Keyword(s):  
Deep Sea ◽  
Visual Pigment ◽  
Internal Limiting Membrane ◽  
Absorption Curve ◽  
Spectral Absorption ◽  
New Methods ◽  
Absorption Of Light ◽  
Conger Eel ◽  
Sea Fish ◽  
Conger Conger

New methods of studying the spectral absorption of intact retinae are described. Using these methods the retina of Conger conger (L.) has been studied and the retinal spectral absorption curves are compared with those obtained on retinal extracts made with digitonin solution. The retina of the conger like that of deep-sea fish is golden in colour, its absorption curve being similar in shape to that of frog rhodopsin but with its maximum displaced about 16 m µ towards the blue end of the spectrum. The absorption curve of unbleached retinae is displaced about 4 m µ towards the red end of the spectrum from the absorption curve of unbleached retinal extract, but, when an estimated correction for possible yellow impurities in the extract is made, this displacement is only one of 2 m µ . The change in optical density of the dark-adapted retina on bleaching with strong white light is 0.6 at λ = 484 m µ : this probably represents a retinal density for unbleached pigment of about 0.8. The visual pigment in the intact retina is approximately twice as effective as simple calculations based on extracts would predict. The absorption of light by the retina is dominated by the principal photosensitive pigment, whilst the screening of the rods, due to the absorption of light by the layers of retina lying between the rods and the internal limiting membrane, is trivial.

Microbial Life in the Trenches

2009 ◽  
Vol 43 (5) ◽  
pp. 128-131 ◽  
Author(s):  
Douglas H. Bartlett
Keyword(s):  
High Pressure ◽  
Hydrostatic Pressure ◽  
Deep Sea ◽  
Ocean Engineering ◽  
Deep Trench ◽  
Microbial Life ◽  
Elevated Hydrostatic Pressure ◽  
Pure Cultures ◽  
History Of ◽  
Challenger Deep

AbstractMicrobiologists have been making use of advances in ocean engineering to explore life in deep-sea trenches for decades, including for many years preceding man’s conquest of the Challenger Deep. This has fostered the development of an unusual branch of microbiology, referred to as high-pressure microbiology. Evidence for deep-trench microbes that grow best at elevated hydrostatic pressure was first obtained in the early 1950s, and isolates were obtained in pure cultures beginning in the early 1980s. Here I describe some of the history of deep-trench microbiology and the characteristics of microbial life in the trenches.

On the visual pigments of deep-sea fish

1997 ◽  
Vol 50 (1) ◽  
pp. 68-85 ◽  
Author(s):  
R. H. Douglas ◽  
J. C. Partridge
Keyword(s):  
Deep Sea ◽  
Visual Pigments ◽  
Sea Fish

The eyes of deep-sea fish I: Lens pigmentation, tapeta and visual pigments

1998 ◽  
Vol 17 (4) ◽  
pp. 597-636 ◽  
Author(s):  
R.H Douglas ◽  
J.C Partridge ◽  
N.J Marshall
Keyword(s):  
Deep Sea ◽  
Visual Pigments ◽  
Sea Fish

scholarly journals Visual Pigments of Deep-Sea Fish

Nature ◽  
1956 ◽  
Vol 178 (4541) ◽  
pp. 1059-1059 ◽  
Author(s):  
E. J. DENTON ◽  
F. J. WARREN
Keyword(s):  
Deep Sea ◽  
Visual Pigments ◽  
Sea Fish
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