scholarly journals In Situ Ore Formation Experiment: Amino Acids and Amino Sugars Trapped in Artificial Chimneys on Deep-Sea Hydrothermal Systems at Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

2005 ◽  
Vol 78 (4) ◽  
pp. 638-651 ◽  
Author(s):  
Yoshinori Takano ◽  
Katsumi Marumo ◽  
Toshiomi Ebashi ◽  
Lallan P. Gupta ◽  
Hodaka Kawahata ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pacific Ocean ◽  
Deep Sea ◽  
Hydrothermal Systems ◽  
Amino Sugars ◽  
Ore Formation ◽  
Formation Experiment

scholarly journals Characterization of Biogenic Amino Acids and Enzymatic Activites in Deep-sea Hydrothermal Systems at Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

2005 ◽  
Vol 14 (2) ◽  
pp. 237-249
Author(s):  
Yoshinori Takano ◽  
Toshiro Yamanaka ◽  
Yae Edazawa ◽  
Kensei Kobayashi ◽  
Katsumi Marumo ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pacific Ocean ◽  
Deep Sea ◽  
Hydrothermal Systems

scholarly journals Amino acids in the 308°C deep-sea hydrothermal system of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

2004 ◽  
Vol 219 (1-2) ◽  
pp. 147-153 ◽  
Author(s):  
Yoshinori Takano ◽  
Kensei Kobayashi ◽  
Toshiro Yamanaka ◽  
Katsumi Marumo ◽  
Tetsuro Urabe
Keyword(s):  
Amino Acids ◽  
Pacific Ocean ◽  
Deep Sea ◽  
Hydrothermal System

scholarly journals Vertical distribution of amino acids and chiral ratios in deep sea hydrothermal sub-vents of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

2004 ◽  
Vol 35 (10) ◽  
pp. 1105-1120 ◽  
Author(s):  
Yoshinori Takano ◽  
Tsukasa Horiuchi ◽  
Katsumi Marumo ◽  
Miwako Nakashima ◽  
Tetsuro Urabe ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pacific Ocean ◽  
Vertical Distribution ◽  
Deep Sea

scholarly journals An Approach for In Situ Rapid Detection of Deep-Sea Aromatic Amino Acids Using Laser-Induced Fluorescence

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1330
Author(s):  
Ranran Du ◽  
Dingtian Yang ◽  
Guangjia Jiang ◽  
Youren Song ◽  
Xiaoqing Yin
Keyword(s):  
Amino Acids ◽  
Deep Sea ◽  
Rapid Detection ◽  
Aromatic Amino Acids ◽  
Practical Method ◽  
Laser Induced Fluorescence ◽  
Carbon Cycles ◽  
Material Circulation ◽  
Almost All

Amino acids are the material basis of almost all life activities. An improved understanding of the source, state, and cycle of amino acids is essential for determining the energy flow and material circulation of marine ecosystems. In the present study, an in situ rapid detection method of ultraviolet (UV; 266 nm) laser-induced fluorescence (LIF) technology was used to detect three natural, aromatic amino acids in the seawater. The laser-induced fluorescence peaks of aromatic amino acids tryptophan, tyrosine, and phenylalanine were located at 350 nm, 300 nm, and 280 nm, respectively. High, linear correlations between the concentrations of the aromatic amino acids and the fluorescence peak heights were observed, and the lowest detectable concentrations of tryptophan, tyrosine, and phenylalanine were 4.70 × 10−9 mol/L, 2.76 × 10−8 mol/L, and 6.05 × 10−7 mol/L, respectively, which allowed us to quantify their concentrations by using laser-induced fluorescence. This paper not only provides a practical method for the detection of aromatic amino acids in seawater, but a new means to further understand the biogeochemical processes of carbon cycles in the deep sea.

scholarly journals Amino acids in water samples from deep sea hydrothermal vents at Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean

2004 ◽  
Vol 35 (10) ◽  
pp. 1121-1128 ◽  
Author(s):  
Tsukasa Horiuchi ◽  
Yoshinori Takano ◽  
Jun-ichiro Ishibashi ◽  
Katsumi Marumo ◽  
Tetsuro Urabe ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pacific Ocean ◽  
Water Samples ◽  
Deep Sea ◽  
Hydrothermal Vents

Mineral–microbe interactions in deep-sea hydrothermal systems: a challenge for Raman spectroscopy

2010 ◽  
Vol 368 (1922) ◽  
pp. 3067-3086 ◽  
Author(s):  
J. A. Breier ◽  
S. N. White ◽  
C. R. German
Keyword(s):  
Raman Spectroscopy ◽  
Deep Sea ◽  
Low Cost ◽  
Hydrothermal Systems ◽  
Laser Raman Spectroscopy ◽  
Full Potential ◽  
Laser Raman ◽  
Mineral Phases ◽  
Hydrothermal Environments

In deep-sea hydrothermal environments, steep chemical and thermal gradients, rapid and turbulent mixing and biologic processes produce a multitude of diverse mineral phases and foster the growth of a variety of chemosynthetic micro-organisms. Many of these microbial species are associated with specific mineral phases, and the interaction of mineral and microbial processes are of only recently recognized importance in several areas of hydrothermal research. Many submarine hydrothermal mineral phases form during kinetically limited reactions and are either metastable or are only thermodynamically stable under in situ conditions. Laser Raman spectroscopy is well suited to mineral speciation measurements in the deep sea in many ways, and sea-going Raman systems have been built and used to make a variety of in situ measurements. However, the full potential of this technique for hydrothermal science has yet to be realized. In this focused review, we summarize both the need for in situ mineral speciation measurements in hydrothermal research and the development of sea-going Raman systems to date; we describe the rationale for further development of a small, low-cost sea-going Raman system optimized for mineral identification that incorporates a fluorescence-minimizing design; and we present three experimental applications that such a tool would enable.

scholarly journals Spatial Distribution of Marine Crenarchaeota Group I in the Vicinity of Deep-Sea Hydrothermal Systems

2004 ◽  
Vol 70 (4) ◽  
pp. 2404-2413 ◽  
Author(s):  
Ken Takai ◽  
Hanako Oida ◽  
Yohey Suzuki ◽  
Hisako Hirayama ◽  
Satoshi Nakagawa ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Systems ◽  
Molecular Techniques ◽  
Ambient Seawater ◽  
16S Ribosomal Dna ◽  
Group I ◽  
Culture Independent ◽  
Clone Analysis ◽  
Hydrothermal Environments

ABSTRACT Distribution profiles of marine crenarchaeota group I in the vicinity of deep-sea hydrothermal systems were mapped with culture-independent molecular techniques. Planktonic samples were obtained from the waters surrounding two geographically and geologically distinct hydrothermal systems, and the abundance of marine crenarchaeota group I was examined by 16S ribosomal DNA clone analysis, quantitative PCR, and whole-cell fluorescence in situ hybridization. A much higher proportion of marine crenarchaeota group I within the microbial community was detected in deep-sea hydrothermal environments than in normal deep and surface seawaters. The highest proportion was always obtained from the ambient seawater adjacent to hydrothermal emissions and chimneys but not from the hydrothermal plumes. These profiles were markedly different from the profiles of epsilon-Proteobacteria, which are abundant in the low temperatures of deep-sea hydrothermal environments.

First in situ studies of nodule distribution and geotechnical measurements of associated deep-sea clay (Northeastern Pacific Ocean)

1992 ◽  
Vol 103 (1-3) ◽  
pp. 373-380 ◽  
Author(s):  
P. Cochonat ◽  
R. Le Suavé ◽  
C. Charles ◽  
B. Greger ◽  
M. Hoffert ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Deep Sea ◽  
In Situ Studies ◽  
Northeastern Pacific
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