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Items: 1 to 50 of 53

1.

An improved method for isolation and purification of underivatized amino acids for radiocarbon analysis.

Ishikawa NF, Itahashi Y, Blattmann TM, Takano Y, Ogawa NO, Yamane M, Yokoyama Y, Nagata T, Yoneda M, Haghipour N, Eglinton TI, Ohkouchi N.

Anal Chem. 2018 Sep 16. doi: 10.1021/acs.analchem.8b02693. [Epub ahead of print]

PMID:
30220201
2.

Quantitative analysis of underivatized amino acids in the sub- to several-nanomolar range by ion-pair HPLC using a corona-charged aerosol detector (HPLC-CAD).

Furota S, Ogawa NO, Takano Y, Yoshimura T, Ohkouchi N.

J Chromatogr B Analyt Technol Biomed Life Sci. 2018 Sep 15;1095:191-197. doi: 10.1016/j.jchromb.2018.07.033. Epub 2018 Jul 25.

PMID:
30077100
3.

1.1-billion-year-old porphyrins establish a marine ecosystem dominated by bacterial primary producers.

Gueneli N, McKenna AM, Ohkouchi N, Boreham CJ, Beghin J, Javaux EJ, Brocks JJ.

Proc Natl Acad Sci U S A. 2018 Jul 24;115(30):E6978-E6986. doi: 10.1073/pnas.1803866115. Epub 2018 Jul 9.

PMID:
29987033
4.

Development of a Method to Isolate Glutamic Acid from Foodstuffs for a Precise Determination of Their Stable Carbon Isotope Ratio.

Kobayashi K, Tanaka M, Yatsukawa Y, Tanabe S, Tanaka M, Ohkouchi N.

Anal Sci. 2018;34(5):571-574. doi: 10.2116/analsci.17P450.

5.

A primordial and reversible TCA cycle in a facultatively chemolithoautotrophic thermophile.

Nunoura T, Chikaraishi Y, Izaki R, Suwa T, Sato T, Harada T, Mori K, Kato Y, Miyazaki M, Shimamura S, Yanagawa K, Shuto A, Ohkouchi N, Fujita N, Takaki Y, Atomi H, Takai K.

Science. 2018 Feb 2;359(6375):559-563. doi: 10.1126/science.aao3407. Epub 2018 Feb 1.

PMID:
29420286
6.

Lithium, magnesium and sulfur purification from seawater using an ion chromatograph with a fraction collector system for stable isotope measurements.

Yoshimura T, Araoka D, Tamenori Y, Kuroda J, Kawahata H, Ohkouchi N.

J Chromatogr A. 2018 Jan 5;1531:157-162. doi: 10.1016/j.chroma.2017.11.052. Epub 2017 Nov 24.

PMID:
29198448
7.

Trophic position and dietary breadth of bats revealed by nitrogen isotopic composition of amino acids.

Campbell CJ, Nelson DM, Ogawa NO, Chikaraishi Y, Ohkouchi N.

Sci Rep. 2017 Nov 21;7(1):15932. doi: 10.1038/s41598-017-15440-3.

8.

Reply to "Comment on "Ecological niche of Neanderthals from Spy Cave revealed by nitrogen isotopes of individual amino acids in collagen." [J. Hum. Evol. 93 (2016) 82-90]" [J. Hum. Evol. 117 (2018) 53-55].

Naito YI, Chikaraishi Y, Drucker DG, Ohkouchi N, Semal P, Wißing C, Bocherens H.

J Hum Evol. 2018 Apr;117:56-60. doi: 10.1016/j.jhevol.2017.09.008. Epub 2017 Oct 10. No abstract available.

PMID:
29029809
9.

High-Precision Simultaneous 18O/16O, 13C/12C, and 17O/16O Analyses for Microgram Quantities of CaCO3 by Tunable Infrared Laser Absorption Spectroscopy.

Sakai S, Matsuda S, Hikida T, Shimono A, McManus JB, Zahniser M, Nelson D, Dettman DL, Yang D, Ohkouchi N.

Anal Chem. 2017 Nov 7;89(21):11846-11852. doi: 10.1021/acs.analchem.7b03582. Epub 2017 Oct 18.

PMID:
28937751
10.

Isotopic analyses suggest mammoth and plant in the diet of the oldest anatomically modern humans from far southeast Europe.

Drucker DG, Naito YI, Péan S, Prat S, Crépin L, Chikaraishi Y, Ohkouchi N, Puaud S, Lázničková-Galetová M, Patou-Mathis M, Yanevich A, Bocherens H.

Sci Rep. 2017 Jul 28;7(1):6833. doi: 10.1038/s41598-017-07065-3.

11.

Integrated trophic position decreases in more diverse communities of stream food webs.

Ishikawa NF, Chikaraishi Y, Ohkouchi N, Murakami AR, Tayasu I, Togashi H, Okano JI, Sakai Y, Iwata T, Kondoh M, Okuda N.

Sci Rep. 2017 May 18;7(1):2130. doi: 10.1038/s41598-017-02155-8.

12.

Unpacking brown food-webs: Animal trophic identity reflects rampant microbivory.

Steffan SA, Chikaraishi Y, Dharampal PS, Pauli JN, Guédot C, Ohkouchi N.

Ecol Evol. 2017 Apr 9;7(10):3532-3541. doi: 10.1002/ece3.2951. eCollection 2017 May.

13.

Microbial Eukaryotes that Lack Sterols.

Takishita K, Chikaraishi Y, Tanifuji G, Ohkouchi N, Hashimoto T, Fujikura K, Roger AJ.

J Eukaryot Microbiol. 2017 Nov;64(6):897-900. doi: 10.1111/jeu.12426. Epub 2017 Jun 7.

PMID:
28509379
14.

Intra-trophic isotopic discrimination of 15N/14N for amino acids in autotrophs: Implications for nitrogen dynamics in ecological studies.

Takizawa Y, Dharampal PS, Steffan SA, Takano Y, Ohkouchi N, Chikaraishi Y.

Ecol Evol. 2017 Mar 22;7(9):2916-2924. doi: 10.1002/ece3.2866. eCollection 2017 May.

15.

Genomic Evidence that Methanotrophic Endosymbionts Likely Provide Deep-Sea Bathymodiolus Mussels with a Sterol Intermediate in Cholesterol Biosynthesis.

Takishita K, Takaki Y, Chikaraishi Y, Ikuta T, Ozawa G, Yoshida T, Ohkouchi N, Fujikura K.

Genome Biol Evol. 2017 May 1;9(5):1148-1160. doi: 10.1093/gbe/evx082.

16.

Trophic discrimination factor of nitrogen isotopes within amino acids in the dobsonfly Protohermes grandis (Megaloptera: Corydalidae) larvae in a controlled feeding experiment.

Ishikawa NF, Hayashi F, Sasaki Y, Chikaraishi Y, Ohkouchi N.

Ecol Evol. 2017 Mar 12;7(6):1674-1679. doi: 10.1002/ece3.2728. eCollection 2017 Mar.

17.

Terrestrial-aquatic linkage in stream food webs along a forest chronosequence: multi-isotopic evidence.

Ishikawa NF, Togashi H, Kato Y, Yoshimura M, Kohmatsu Y, Yoshimizu C, Ogawa NO, Ohte N, Tokuchi N, Ohkouchi N, Tayasu I.

Ecology. 2016 May;97(5):1146-58.

PMID:
27349092
18.

Ecological niche of Neanderthals from Spy Cave revealed by nitrogen isotopes of individual amino acids in collagen.

Naito YI, Chikaraishi Y, Drucker DG, Ohkouchi N, Semal P, Wißing C, Bocherens H.

J Hum Evol. 2016 Apr;93:82-90. doi: 10.1016/j.jhevol.2016.01.009. Epub 2016 Mar 12.

PMID:
27086057
19.

Seasonal changes in infection with trematode species utilizing jellyfish as hosts: evidence of transmission to definitive host fish via medusivory.

Kondo Y, Ohtsuka S, Hirabayashi T, Okada S, Ogawa NO, Ohkouchi N, Shimazu T, Nishikawa J.

Parasite. 2016;23:16. doi: 10.1051/parasite/2016016. Epub 2016 Apr 7.

20.

Widespread collapse of the Ross Ice Shelf during the late Holocene.

Yokoyama Y, Anderson JB, Yamane M, Simkins LM, Miyairi Y, Yamazaki T, Koizumi M, Suga H, Kusahara K, Prothro L, Hasumi H, Southon JR, Ohkouchi N.

Proc Natl Acad Sci U S A. 2016 Mar 1;113(9):2354-9. doi: 10.1073/pnas.1516908113. Epub 2016 Feb 16.

21.

Microbes are trophic analogs of animals.

Steffan SA, Chikaraishi Y, Currie CR, Horn H, Gaines-Day HR, Pauli JN, Zalapa JE, Ohkouchi N.

Proc Natl Acad Sci U S A. 2015 Dec 8;112(49):15119-24. doi: 10.1073/pnas.1508782112. Epub 2015 Nov 23.

22.

Earliest evidence of pollution by heavy metals in archaeological sites.

Monge G, Jimenez-Espejo FJ, García-Alix A, Martínez-Ruiz F, Mattielli N, Finlayson C, Ohkouchi N, Sánchez MC, de Castro JM, Blasco R, Rosell J, Carrión J, Rodríguez-Vidal J, Finlayson G.

Sci Rep. 2015 Sep 21;5:14252. doi: 10.1038/srep14252.

23.

DEEP BIOSPHERE. Exploring deep microbial life in coal-bearing sediment down to ~2.5 km below the ocean floor.

Inagaki F, Hinrichs KU, Kubo Y, Bowles MW, Heuer VB, Hong WL, Hoshino T, Ijiri A, Imachi H, Ito M, Kaneko M, Lever MA, Lin YS, Methé BA, Morita S, Morono Y, Tanikawa W, Bihan M, Bowden SA, Elvert M, Glombitza C, Gross D, Harrington GJ, Hori T, Li K, Limmer D, Liu CH, Murayama M, Ohkouchi N, Ono S, Park YS, Phillips SC, Prieto-Mollar X, Purkey M, Riedinger N, Sanada Y, Sauvage J, Snyder G, Susilawati R, Takano Y, Tasumi E, Terada T, Tomaru H, Trembath-Reichert E, Wang DT, Yamada Y.

Science. 2015 Jul 24;349(6246):420-4. doi: 10.1126/science.aaa6882. Epub 2015 Jul 23.

24.

The origin of Cretaceous black shales: a change in the surface ocean ecosystem and its triggers.

Ohkouchi N, Kuroda J, Taira A.

Proc Jpn Acad Ser B Phys Biol Sci. 2015;91(7):273-91. doi: 10.2183/pjab.91.273. Review.

25.

Diet quality influences isotopic discrimination among amino acids in an aquatic vertebrate.

Chikaraishi Y, Steffan SA, Takano Y, Ohkouchi N.

Ecol Evol. 2015 May;5(10):2048-59. doi: 10.1002/ece3.1491. Epub 2015 Apr 25.

26.

High-resolution food webs based on nitrogen isotopic composition of amino acids.

Chikaraishi Y, Steffan SA, Ogawa NO, Ishikawa NF, Sasaki Y, Tsuchiya M, Ohkouchi N.

Ecol Evol. 2014 Jun;4(12):2423-49. doi: 10.1002/ece3.1103. Epub 2014 May 17.

27.

Complete genome of a nonphotosynthetic cyanobacterium in a diatom reveals recent adaptations to an intracellular lifestyle.

Nakayama T, Kamikawa R, Tanifuji G, Kashiyama Y, Ohkouchi N, Archibald JM, Inagaki Y.

Proc Natl Acad Sci U S A. 2014 Aug 5;111(31):11407-12. doi: 10.1073/pnas.1405222111. Epub 2014 Jul 21.

28.

Quantitative analysis of coenzyme F430 in environmental samples: a new diagnostic tool for methanogenesis and anaerobic methane oxidation.

Kaneko M, Takano Y, Chikaraishi Y, Ogawa NO, Asakawa S, Watanabe T, Shima S, Krüger M, Matsushita M, Kimura H, Ohkouchi N.

Anal Chem. 2014 Apr 1;86(7):3633-8. doi: 10.1021/ac500305j. Epub 2014 Mar 21.

PMID:
24605937
29.

Trophic hierarchies illuminated via amino acid isotopic analysis.

Steffan SA, Chikaraishi Y, Horton DR, Ohkouchi N, Singleton ME, Miliczky E, Hogg DB, Jones VP.

PLoS One. 2013 Sep 25;8(9):e76152. doi: 10.1371/journal.pone.0076152. eCollection 2013.

30.

Hydrogen cyanide production due to mid-size impacts in a redox-neutral N2-rich atmosphere.

Kurosawa K, Sugita S, Ishibashi K, Hasegawa S, Sekine Y, Ogawa NO, Kadono T, Ohno S, Ohkouchi N, Nagaoka Y, Matsui T.

Orig Life Evol Biosph. 2013 Jun;43(3):221-45. doi: 10.1007/s11084-013-9339-0. Epub 2013 Jul 23.

PMID:
23877440
31.

Liver transplantation from a donor with asymptomatic type IV-a choledochal cyst: the long-term postoperative course.

Fujishiro J, Hori T, Kaneko M, Fukunaga K, Ohkouchi N, Takada Y, Masumoto K.

Transplantation. 2012 Dec 27;94(12):e72. doi: 10.1097/TP.0b013e31827578c7. No abstract available.

PMID:
23263448
32.

A low trophic position of Japanese eel larvae indicates feeding on marine snow.

Miller MJ, Chikaraishi Y, Ogawa NO, Yamada Y, Tsukamoto K, Ohkouchi N.

Biol Lett. 2013 Feb 23;9(1):20120826. doi: 10.1098/rsbl.2012.0826. Epub 2012 Nov 7.

33.

Lateral transfer of tetrahymanol-synthesizing genes has allowed multiple diverse eukaryote lineages to independently adapt to environments without oxygen.

Takishita K, Chikaraishi Y, Leger MM, Kim E, Yabuki A, Ohkouchi N, Roger AJ.

Biol Direct. 2012 Feb 1;7:5. doi: 10.1186/1745-6150-7-5.

34.

Mammalian DNA δ15N exhibits 40‰ intramolecular variation and is unresponsive to dietary protein level.

Strable MS, Tschanz CL, Varamini B, Chikaraishi Y, Ohkouchi N, Brenna JT.

Rapid Commun Mass Spectrom. 2011 Dec 15;25(23):3555-62. doi: 10.1002/rcm.5263.

35.

Osmium evidence for synchronicity between a rise in atmospheric oxygen and Palaeoproterozoic deglaciation.

Sekine Y, Suzuki K, Senda R, Goto KT, Tajika E, Tada R, Goto K, Yamamoto S, Ohkouchi N, Ogawa NO, Maruoka T.

Nat Commun. 2011 Oct 11;2:502. doi: 10.1038/ncomms1507.

PMID:
21988918
36.

Temperature effect on leaf water deuterium enrichment and isotopic fractionation during leaf lipid biosynthesis: results from controlled growth of C3 and C4 land plants.

Zhou Y, Grice K, Chikaraishi Y, Stuart-Williams H, Farquhar GD, Ohkouchi N.

Phytochemistry. 2011 Feb;72(2-3):207-13. doi: 10.1016/j.phytochem.2010.10.022. Epub 2010 Dec 15.

PMID:
21167535
37.

Isolation and desalting with cation-exchange chromatography for compound-specific nitrogen isotope analysis of amino acids: application to biogeochemical samples.

Takano Y, Kashiyama Y, Ogawa NO, Chikaraishi Y, Ohkouchi N.

Rapid Commun Mass Spectrom. 2010 Aug 30;24(16):2317-23. doi: 10.1002/rcm.4651.

38.
39.

Organic analysis of peridotite rocks from the Ashadze and Logatchev hydrothermal sites.

Bassez MP, Takano Y, Ohkouchi N.

Int J Mol Sci. 2009 Jul 3;10(7):2986-98. doi: 10.3390/ijms10072986.

40.

Compound-specific nitrogen isotope analysis of D-alanine, L-alanine, and valine: application of diastereomer separation to delta15N and microbial peptidoglycan studies.

Takano Y, Chikaraishi Y, Ogawa NO, Kitazato H, Ohkouchi N.

Anal Chem. 2009 Jan 1;81(1):394-9. doi: 10.1021/ac802077v.

PMID:
19061396
41.

Evidence of global chlorophyll d.

Kashiyama Y, Miyashita H, Ohkubo S, Ogawa NO, Chikaraishi Y, Takano Y, Suga H, Toyofuku T, Nomaki H, Kitazato H, Nagata T, Ohkouchi N.

Science. 2008 Aug 1;321(5889):658. doi: 10.1126/science.1158761.

42.

Geographical origin of polished rice based on multiple element and stable isotope analyses.

Suzuki Y, Chikaraishi Y, Ogawa NO, Ohkouchi N, Korenaga T.

Food Chem. 2008 Jul 15;109(2):470-5. doi: 10.1016/j.foodchem.2007.12.063. Epub 2008 Jan 9.

PMID:
26003374
43.

Synchronous rectal metastasis from invasive lobular carcinoma of the breast.

Yanagisawa K, Yamamoto M, Ueno E, Ohkouchi N.

J Gastroenterol Hepatol. 2007 Apr;22(4):601-2. No abstract available.

PMID:
17376062
44.
45.

Serious intestinal bleeding from vascular ectasia secondary to portal thrombosis after living-related liver transplantation in a child.

Usuda M, Fujimori K, Koyamada N, Fukumori T, Sekiguchi S, Kawagishi N, Akamatsu Y, Tsukamoto S, Enomoto Y, Ohkouchi N, Satomi S.

J Hepatobiliary Pancreat Surg. 2005;12(4):317-20.

PMID:
16133700
46.

Biogeochemical processes in the saline meromictic Lake Kaiike, Japan: implications from molecular isotopic evidences of photosynthetic pigments.

Ohkouchi N, Nakajima Y, Okada H, Ogawa NO, Suga H, Oguri K, Kitazato H.

Environ Microbiol. 2005 Jul;7(7):1009-16.

PMID:
15946297
47.

Hydrogen, carbon and nitrogen isotopic fractionations during chlorophyll biosynthesis in C3 higher plants.

Chikaraishi Y, Matsumoto K, Ogawa NO, Suga H, Kitazato H, Ohkouchi N.

Phytochemistry. 2005 Apr;66(8):911-20.

PMID:
15845409
48.

Distribution of chloropigments in suspended particulate matter and benthic microbial mat of a meromictic lake, Lake Kaiike, Japan.

Nakajima Y, Okada H, Oguri K, Suga H, Kitazato H, Koizumi Y, Fukui M, Ohkouchi N.

Environ Microbiol. 2003 Nov;5(11):1103-10.

PMID:
14641590
49.

Spatial and temporal offsets between proxy records in a sediment drift.

Ohkouchi N, Eglinton TI, Keigwin LD, Hayes JM.

Science. 2002 Nov 8;298(5596):1224-7. Epub 2002 Oct 10.

50.

[Clinical effect of arbekacin on MRSA infections after gastrointestinal surgery].

Ochiai M, Tanimura H, Noguchi K, Takifuji K, Konishi R, Ohkouchi N, Kouno N, Ohnishi H, Shimada K, Kasitani M, et al.

Jpn J Antibiot. 1994 Jun;47(6):837-43. Japanese.

PMID:
8072194

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