Hydroxy fatty acids in marine aerosols as microbial tracers: 4-year study on β- and ω-hydroxy fatty acids from remote Chichijima Island in the western North Pacific

2015 ◽  
Vol 115 ◽  
pp. 89-100 ◽  
Author(s):  
Poonam Tyagi ◽  
Yutaka Ishimura ◽  
Kimitaka Kawamura
Keyword(s):  
Fatty Acids ◽  
North Pacific ◽  
Western North Pacific ◽  
Hydroxy Fatty Acids ◽  
Marine Aerosols

Terrestrial lipid biomarkers in marine aerosols over the western North Pacific during 1990–1993 and 2006–2009

2021 ◽  
pp. 149115
Author(s):  
Jing Chen ◽  
Kimitaka Kawamura ◽  
Wei Hu ◽  
Cong-Qiang Liu ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
North Pacific ◽  
Western North Pacific ◽  
Lipid Biomarkers ◽  
Marine Aerosols

scholarly journals Compound-Specific Radiocarbon Ages of Fatty Acids in Marine Sediments from the Western North Pacific

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 949-956 ◽  
Author(s):  
Masao Uchida ◽  
Yasuyuki Shibata ◽  
Kimitaka Kawamura ◽  
Yuichiro Kumamoto ◽  
Minoru Yoneda ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Molecular Weight ◽  
Organic Matter ◽  
Marine Sediments ◽  
North Pacific ◽  
Western North Pacific ◽  
Higher Plants ◽  
Bimodal Distribution ◽  
Marine Organisms ◽  
Terrestrial Organic Matter

Compound-specific radiocarbon analysis of five fatty-acid biomarkers was conducted for marine sediments collected from the western North Pacific. The fatty acids (C12 to C34) showed a typical bimodal distribution pattern with two maxima at C16 and C26. Their carbon isotopic compositions ranged from −25.1‰ (C16) to −31.8‰ (C28), suggesting that they derived from terrestrial higher plants and marine organisms. A large variations of 14C ages were found among the fatty acids detected in the same sedimentary horizon of the core, ranging from 530 BP (C18) to 3250 BP (C28). The results of 14C analysis of fatty acids could be divided into two groups, i.e., lower molecular weight (LMW) fatty acids (C16, C18) derived from marine organisms and higher molecular weight (HMW) fatty acids (C24, C26, C28) derived from terrestrial higher plants. The HMW fatty acids showed older ages, ranging from 2550 BP (C24) to 3250 BP (C28), than LMW fatty acids (530 BP [C18] to 1,820 years BP [C16]). On the other hand, bulk-phase total organic matter (TOM) showed the age of 2260 BP that is between those two groups, suggesting that it was likely a mixture of organic matter derived from marine and terrestrial sources. The compound specific 14C ages and δ13C data of sedimentary fatty acids presented here could provide useful information to decipher the fate and transport process of terrestrial organic matter to marine sediments.

Hydroxy Fatty Acids in Remote Marine Aerosols over the Pacific Ocean: Impact of Biological Activity and Wind Speed

2019 ◽  
Vol 3 (3) ◽  
pp. 366-379 ◽  
Author(s):  
Poonam Bikkina ◽  
Kimitaka Kawamura ◽  
Srinivas Bikkina ◽  
Bhagawati Kunwar ◽  
Kiichiro Tanaka ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Biological Activity ◽  
Wind Speed ◽  
Pacific Ocean ◽  
Hydroxy Fatty Acids ◽  
Marine Aerosols ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Remote Marine Aerosols
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