scholarly journals Kinetic Study on the Mineralization of Low Molecular Fatty Acids in an Anoxic Marine Sediment

1995 ◽  
Vol 61 (3) ◽  
pp. 482-486 ◽  
Author(s):  
Ryuji Kondo ◽  
Toshitaka Nishijima ◽  
Yoshihiko Hata
Keyword(s):  
Fatty Acids ◽  
Kinetic Study ◽  
Marine Sediment ◽  
Anoxic Marine Sediment

scholarly journals Cyclobacterium qasimii sp. nov., a psychrotolerant bacterium isolated from Arctic marine sediment

2012 ◽  
Vol 62 (Pt_9) ◽  
pp. 2133-2139 ◽  
Author(s):  
S. Shivaji ◽  
P. Vishnu Vardhan Reddy ◽  
S. S. S. Nageshwara Rao ◽  
Zareena Begum ◽  
Poorna Manasa ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Marine Sediment ◽  
Dna Hybridization ◽  
Type Species ◽  
Unsaturated Fatty Acids ◽  
Rrna Gene ◽  
Respiratory Quinone ◽  
Content Type ◽  
Link Type ◽  
Sequence Similarities

A novel Gram-stain-negative, horseshoe-shaped, non-motile bacterium, designated strain M12-11BT, was isolated from a marine sediment sample collected at a depth of 200 m from Kongsfjorden, Svalbard. The colony colour was orangish red due to the presence of carotenoids. Fatty acids were dominated by branched and unsaturated fatty acids (90.8 %), with a high abundance of iso-C15 : 0 (14.9 %), anteiso-C15 : 0 (11.4 %), iso-C15 : 1 G (13.1 %), C15 : 1ω6c (5.4 %), C17 : 1ω6c (6.7 %), summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c; 9.3 %) and summed feature 9 (10-methyl C16 : 0 and/or iso-C17 : 1ω9c; 5.9 %). Strain M12-11BT contained MK-7 as the major respiratory quinone. The polar lipids consisted of phosphatidylcholine, phosphatidylethanolamine, one unidentified aminolipid and three unidentified lipids. Based on 16S rRNA gene sequence similarities, the type strains of Cyclobacterium amurskyense , Cyclobacterium marinum and Cyclobacterium lianum were most closely related to M12-11BT with sequence similarities of 98.2, 96.8 and 93.3 %, respectively. Other members of the family Cyclobacteriaceae had sequence similarities of <92.0 %. However, DNA–DNA hybridization with Cyclobacterium amurskyense KCTC 12363T and Cyclobacterium marinum DSM 745T showed relatedness values of only 24.5 and 32.5 % with respect to strain M12-11BT. Based on the results of DNA–DNA hybridization experiments and phenotypic and chemotaxonomic data, it appears that strain M12-11BT represents a novel species of the genus Cyclobacterium , for which the name Cyclobacterium qasimii sp. nov. is proposed; the type strain is M12-11BT ( = KCTC 23011T = NBRC 106168T) and it has a DNA G+C content of 40.5 mol%.

Silicate weathering in anoxic marine sediment as a requirement for authigenic carbonate burial

2020 ◽  
Vol 200 ◽  
pp. 102960 ◽  
Author(s):  
Marta E. Torres ◽  
Wei-Li Hong ◽  
Evan A. Solomon ◽  
Kitty Milliken ◽  
Ji-Hoon Kim ◽  
...  
Keyword(s):  
Marine Sediment ◽  
Authigenic Carbonate ◽  
Silicate Weathering ◽  
Anoxic Marine Sediment

scholarly journals Nocardiopsis aegyptia sp. nov., isolated from marine sediment

2004 ◽  
Vol 54 (2) ◽  
pp. 453-456 ◽  
Author(s):  
Soraya A. Sabry ◽  
Nevine B. Ghanem ◽  
Gehan A. Abu-Ella ◽  
Peter Schumann ◽  
Erko Stackebrandt ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Marine Sediment ◽  
Sequence Similarity ◽  
Aerial Mycelium ◽  
Diaminopimelic Acid ◽  
Rrna Gene ◽  
16S Rdna Sequence Analysis ◽  
Light Yellow ◽  
Dna Reassociation ◽  
Abu Qir Bay

An actinomycete, strain SNG49T, was isolated from marine sediment of Abu Qir Bay, on the western seashore of Alexandria, Egypt. The bacterium was aerobic and Gram-positive. It produced beige to light-yellow aerial mycelium, brown substrate mycelium and straight to flexuous hyphae, but no specific spore chains. 16S rDNA sequence analysis and chemotaxonomic markers were consistent with classification of strain SNG49T in the genus Nocardiopsis, i.e. meso-diaminopimelic acid; no diagnostic sugars; phosphatidylcholine, phosphatidylmethylethanolamine, phosphatidylinositol, phosphatidylglycerol and diphosphatidylglycerol as polar lipids; menaquinones of the MK-10 series from MK-10(H0) to MK-10(H8); and iso/anteiso-branched and 10-methyl-branched fatty acids, the principal fatty acids being anteiso-17 : 0 and tuberculostearic acid. Nocardiopsis lucentensis and Nocardiopsis alba are the phylogenetic neighbours of strain SNG49T, respectively showing 98·8 and 98·7 % 16S rRNA gene sequence similarity; however, moderate DNA–DNA reassociation values between these two species and strain SNG49T (44 and 60 %, respectively) showed that strain SNG49T could be clearly separated from them. These data, together with distinct physiological traits, led to the conclusion that this isolate represents a novel species within the genus Nocardiopsis, for which the name Nocardiopsis aegyptia is proposed. The type strain is SNG49T (=DSM 44442T=NRRL B-24244T).

A kinetic study of the esterification of free fatty acids (FFA) in sunflower oil

Fuel ◽  
2007 ◽  
Vol 86 (15) ◽  
pp. 2383-2388 ◽  
Author(s):  
M BERRIOS ◽  
J SILES ◽  
M MARTIN ◽  
A MARTIN
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Kinetic Study ◽  
Sunflower Oil
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