Results 71 to 80 of about 27,045 (236)

Rhodopsin in the Dark Hot Sea: Molecular Analysis of Rhodopsin in a Snailfish, Careproctus rhodomelas, Living near the Deep-Sea Hydrothermal Vent. [PDF]

PLoS ONE, 2015
Visual systems in deep-sea fishes have been previously studied from a photobiological aspect; however, those of deep-sea fish inhabiting the hydrothermal vents are far less understood due to sampling difficulties.
Rie Sakata, Ryo Kabutomori, Keiko Okano, Hiromasa Mitsui, Akihiro Takemura, Tetsuya Miwa, Hiroyuki Yamamoto, Toshiyuki Okano   +7 more
doaj   +1 more source

Chemotrophic Microbial Mats and Their Potential for Preservation in the Rock Record [PDF]

, 2009
Putative microbialites are commonly regarded to have formed in association with photosynthetic microorganisms, such as cyanobacteria. However, many modern microbial mat ecosystems are dominated by chemotrophic bacteria and archaea.
Bailey, Jake V., Corsetti, Frank A., Joye, Samantha B., Orphan, Victoria J.   +3 more
core   +1 more source

A distinct gene expression mechanism for d‐amino acid utilization in hyperthermophilic archaeon Pyrococcus horikoshii

The FEBS Journal, EarlyView.
The genes PH0137, PH0138, and PH0140 form a cluster in the genome of Pyrococcus horikoshii. The PH0140 gene encodes a transcription factor identified as a d‐amino acid‐responsive regulatory protein (DARP). In feast mode, l‐Ile‐bound DARP binds to the promoter and represses transcription of PH0137 and PH0138. In famine mode, DARP binds to d‐allo‐Ile and
Ryushi Kawakami, Tomoki Kawase, Taira Uehara, Haruhiko Sakuraba, Tomohiko Matsuzawa, Junji Hayashi, Toshihisa Ohshima   +6 more
wiley   +1 more source

Scientific divers quantify first known outbreaks of cold-water coral disease [PDF]

, 2009
Coral diseases are widely reported in the tropics but the first incidence of cold-water coral disease was not noted until 2002 when divers recorded an outbreak at 10-28 m depth off Lundy in a NE Atlantic marine protected area.
Hall-Spencer, J, Hiscock, K, Munn, C
core  

Shallow submarine hydrothermal systems in the Aeolian Volcanic Arc, Italy [PDF]

, 2009
The majority of known high-temperature hydrothermal vents occur at mid-ocean ridges and back-arc spreading centers, typically at water depths from 2000 to 4000 meters.
Esposito, Hannington, J. Bruce Gemmell, Klas Lackschewitz, Mark D. Hannington, Michael Hügler, Ronde, Sven Petersen, Thomas Monecke   +8 more
core   +1 more source

Prebiotic aqueous reactions catalyzed by native nickel without hydrogen

The FEBS Journal, EarlyView.
Serpentinizing (H2‐producing) hydrothermal vents are candidate environments for metabolic origin. They generate highly reducing conditions that convert CO2 to formate and methane in abiotic reactions resembling reactions of the acetyl‐CoA pathway of CO2 fixation. They also contain natural catalysts. Native nickel (Ni0), like Fe0, Co0, and their alloys,
Carolina Garcia Garcia, Max Brabender, William F. Martin   +2 more
wiley   +1 more source

Endemism shapes viral ecology and evolution in globally distributed hydrothermal vent ecosystems

Nature Communications
Viruses are ubiquitous in deep-sea hydrothermal vents, where they influence microbial communities and biogeochemistry. Yet, viral ecology and evolution remain understudied in these environments.
Marguerite V. Langwig, Faith Koester, Cody Martin, Zhichao Zhou, Samantha B. Joye, Anna-Louise Reysenbach, Karthik Anantharaman   +6 more
doaj   +1 more source

On the Potential for Bioenergy and Biofuels from Hydrothermal Vent Microbes [PDF]

Oceanography, 2012
The discovery of deep-sea hydrothermal vents caused scientists to reconsider their notions about life in the deep sea. In these seemingly inhospitable environments, free-living microbes, as well as microbial-animal symbioses, thrive in the warm waters ...
Peter R. Girguis, James F. Holden
doaj  

The Role of Oxidative Stress in Periodontitis

Journal of Periodontal Research, EarlyView.
Oxidative stress is involved in multiple chemical reactions that take place in different intracellular organelles: mitochondria, rough endoplasmic reticulum, peroxisomes, autophagy, and aging, and can be influenced by exogenous factors: nutrition, physical activity, psychological status, environmental conditions, microbiome, and drugs.
Pedro Bullon, Francesca Giampieri, Beatriz Bullon, Maurizio Battino   +3 more
wiley   +1 more source

Understanding marine biodiversity patterns and drivers: The fall of Icarus

Marine Ecology, EarlyView.
Abstract Biodiversity patterns are fundamental in our understanding of the distribution of life, ecosystem function, and conservation. In this concept analysis, A survey of the existing knowledge on marine biodiversity patterns and drivers across latitudes, longitudes, and depths indicates that none of the postulated patterns represent a rule.
Roberto Danovaro
wiley   +1 more source