Results 81 to 90 of about 3,288 (209)

Quantifying Inorganic Nitrogen Assimilation by Synechococcus Using Bulk and Single-Cell Mass Spectrometry: A Comparative Study

Frontiers in Microbiology, 2018
Microorganisms drive most of the major biogeochemical cycles in the ocean, but the rates at which individual species assimilate and transform key elements is generally poorly quantified.
Marco Giardina, Soshan Cheong, Christopher E. Marjo, Peta L. Clode, Peta L. Clode, Peta L. Clode, Paul Guagliardo, Russell Pickford, Mathieu Pernice, Justin R. Seymour, Jean-Baptiste Raina   +10 more
doaj   +1 more source

Correlated XANES, TEM, and NanoSIMS of presolar graphite grains

Geochimica et Cosmochimica Acta, 2018
Abstract We report correlated XANES, TEM, and NanoSIMS measurements of twelve presolar graphite grains extracted from primitive meteorites and for which isotopic data indicate predominantly Type-II supernovae origins. We find continued evidence for isotopic heterogeneities in presolar graphite grains, including the first observation of a radial ...
Groopman, Evan E., Nittler, Larry R.
openaire   +1 more source

Development of correlative TEM/NanoSIMS imaging to identify, localize and quantify nanoparticles in biological tissues [PDF]

, 2023
Les nanoparticules de dioxyde de titane (TiO2) font l’objet de nombreux travaux et controverses sur les risques qu’elles pourraient engendrer dans l’environnement et sur la santé humaine.
Janin, Morgane
core  

Gamma mark: an ingenuity to ease the aiming of melt inclusions in phenocrysts with NanoSIMS

Earth, Planets and Space
This short report introduces one of the ways to quickly and accurately aim melt inclusions in phenocryst using NanoSIMS.
Isoji Miyagi
doaj   +1 more source

Combination of focused ion beam (FIB) and microtome by ultrathin slice preparation for transmission electron microscopy (TEM) observation

Earth, Planets and Space, 2018
There are growing demands for integrated study of isotopes, trace elements and crystallography of micron-sized grains observed on polished sections or scattered on surface of sample holders.
Yuchen Xu, Lixin Gu, Yang Li, Bing Mo, Yangting Lin   +4 more
doaj   +1 more source

Nanopore direct RNA sequencing and the epitranscriptome: Advances in mapping native RNA landscapes

iMeta, Volume 5, Issue 3, June 2026.
Nanopore direct RNA sequencing advances transcriptomics by capturing full‐length transcripts and multiple RNA modifications; this review details its principles, workflows, tools, applications, challenges, and future research potential. Abstract Nanopore direct RNA sequencing (DRS) has transformed transcriptomics by enabling single‐molecule, long‐read ...
Tianyuan Zhang, Jia Li, Chao Tang, You Wu, Hao Wu, Xi‐Tong Zhu, Ziyang Luo, Hang Qin, Lishan Ding, Yu Zeng, Shiou Yih Lee, Xiaotao Shen, Shiwen Gao, Zhaoyang Tian, Qian Tang, Mian Li, Muhammad Tahir Ul Qamar, Yang Dong, Komivi Dossa, Yaxuan Zhang, Hu Chen, Sanqi An, Xiang Yu, Lu Chen, Dingjie Wang, Shengli Li, Ling‐Ling Chen, Yanqiang Li   +27 more
wiley   +1 more source

Chemical imaging with NanoSIMS: A window into deep-Earth geochemistry [PDF]

, 2015
We use a combination of nanometer-resolution secondary ion mass spectrometry (NanoSIMS) and analytical transmission electron microscopy (ATEM) for chemical imaging of material transformed in a laser-heated diamond anvil cell (LH-DAC), in the pressure ...
Badro, James, Ryerson, Frederick, Webber, Peter K, Hutcheon, Ian D, Ricolleau, Angele, Fallon, Stewart   +5 more
core   +1 more source

Highly Dynamic Cellular-Level Response of Symbiotic Coral to a Sudden Increase in Environmental Nitrogen

mBio, 2013
Metabolic interactions with endosymbiotic photosynthetic dinoflagellate Symbiodinium spp. are fundamental to reef-building corals (Scleractinia) thriving in nutrient-poor tropical seas.
C. Kopp, M. Pernice, I. Domart-Coulon, C. Djediat, J. E. Spangenberg, D. T. L. Alexander, M. Hignette, T. Meziane, A. Meibom   +8 more
doaj   +1 more source

Anhydrous minerals in asteroid Bennu: Evidence for well‐preserved primordial components

Meteoritics &Planetary Science, Volume 61, Issue 6, Page 963-986, June 2026.
Abstract Aqueously altered carbonaceous astromaterials are dominated by secondary minerals, but a minor fraction of primary, anhydrous silicates and oxides escape alteration, offering insight into the original composition of asteroid parent bodies. We report the mineralogy, petrology, mineral chemistry, and oxygen isotopes of anhydrous minerals—50 ...
S. S. Russell, I. A. Franchi, T. Salge, X. Zhao, R. H. Jones, A. J. King, N. V. Almeida, P. F. Schofield, H. C. Bates, E. A. Cortes‐Calderon, N. Kawasaki, Y. Yurimoto, Y. Marrocchi, G. Libourel, K. Thomas‐Keprta, L. P. Keller, K. Righter, T. J. McCoy, T. J. Zega, J. J. Barnes, A. N. Nguyen, S. Tachibana, H. C. Connolly Jr, D. S. Lauretta   +23 more
wiley   +1 more source

Potential of VIS‐IR imaging spectroscopy and SEM‐EDS and EMPA to map the mineralogical composition of NWA 7317 (CR6)

Meteoritics &Planetary Science, Volume 61, Issue 6, Page 1026-1044, June 2026.
Abstract Asteroid compositional analysis relies on comparing reflectance spectra with laboratory data from well‐characterized meteorites. To advance this comparison, we performed a comprehensive laboratory analysis on a slab of the Northwest Africa (NWA) 7317—CR6 carbonaceous chondrite.
Simone Pascucci, Tiberio Cuppone, Martina Casalini, Simone De Angelis, Antonio Lettino, Angelo Palombo, Eliana La Francesca, Gianrico Filacchione, Maria Cristina De Sanctis, Anna Galiano, Giovanni Pratesi   +10 more
wiley   +1 more source