Results 141 to 150 of about 34,873 (245)

Reciclagem de cobre proveniente de analisador automático de carbono e nitrogênio

Química Nova, 2002
Isotopic and elemental analysis of N, C and S in liquid and solid samples has been simplified with the advent of automated systems. The simplest method of automation for this kind of analysis involves an elemental analyzer interfaced directly to the ion ...
Bendassolli José Albertino, Mortatti Jefferson, Trivelin Paulo Cesar Ocheuze, Ignoto Raquel de Fátima, Bonassi José Aurélio, Tavares Glauco Arnold   +5 more
doaj  

Differentiation of Ecological Niches in Trophic Specialists From a Disturbed Lacustrine Ecosystem: Insights from the Sympatric Lake Tana Labeobarbs (Cyprinidae)

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Lake Tana harbors the world's most complex adaptive radiation of cyprinids in the world. Although trophic specialization has been proven to drive this diversification, the diet of endemics has been studied using only traditional stomach content analysis.
Evgeny V. Esin, Anastasia D. Kudryavtseva, Boris A. Levin, Belay Abdissa, Benyam Hailu, Fedor N. Shkil, Axel Meyer   +6 more
wiley   +1 more source

Source Fingerprinting of PFOA via Full- and Intramolecular Stable Isotope Ratios of Carbon Using Orbitrap-IRMS. [PDF]

Anal Chem
Nelson HM, Xu Z, Li H, Moran JJ.
europepmc   +1 more source

Tumor‐Associated Macrophages as Therapeutic Targets: Deciphering Interaction Networks and Advancing Clinical Translation

MedComm, Volume 7, Issue 2, February 2026.
Tumor‐associated macrophages are the most abundant immune cells in the tumor microenvironment, driving malignant progression and treatment resistance. This review summarizes the protumor mechanisms of TAMs (including phagocytosis modulation, metabolic reprogramming, exosomal communication, and immune interactions), evaluates three major strategies ...
Wurihan Bao, Xiaojie Qu, Yiqi Wang, Dan Huang, Huiling Zhang, Mingyuan Dong, Han Sun, Zhaogang Yang, Xuefeng Li   +8 more
wiley   +1 more source

Stable Nitrogen Isotope Analysis of Amino Acids by Orbitrap Mass Spectrometry: Application for Extraterrestrial Samples. [PDF]

Rapid Commun Mass Spectrom
McIntosh OM, Baczynski AA, Matney M, McLain HL, Farnsworth KK, Dworkin JP, Glavin DP, Elsila JE, Xie H, Freeman KH.   +9 more
europepmc   +1 more source

Orbital Variability in Grazing Proportion: New Insights From Sedimentary Amino Acid δ15N Records of the Western Equatorial Pacific

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract The carbon sequestration capacity of the biological carbon pump (BCP) is determined by surface ocean carbon fixation and the transportation of fixed carbon to the ocean interior, which is closely linked to the trophic structure of planktonic ecosystem.
Chen Li, Haowen Dang, Jinlong Du, Hongliang Li, Jingjing Zhang, Zhimin Jian   +5 more
wiley   +1 more source

Coupling Liquid Chromatography to Orbitrap Isotope Ratio Mass Spectrometry: Overcoming Isotope Effects of Chromatography and Amount-Dependency by Peak Homogenization. [PDF]

Anal Chem
Canavan A, Prechtl L, Al-Ghoul H, Kuhlbusch N, Erhardt AM, Elsner M.   +5 more
europepmc   +1 more source

Reconstructing Late Pleistocene to Prehistorical Holocene Geomagnetic Field Variations From La Palma Lava Flows (Canary Islands, Spain): Unraveling Viscous Components

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract We present new vector paleomagnetic data from 13 radiometrically dated lava‐flows in southern La Palma (Canary Islands) spanning from 1 to 56 ka, which covers most of the Late Pleistocene to prehistoric Holocene volcanic record in the island.
Eva Vernet, Manuel Calvo‐Rathert, Ángel Carrancho, Yuhji Yamamoto, Lidia Rodríguez‐Méndez, Josep M. Parés, Vicente Soler   +6 more
wiley   +1 more source

Stable Carbon Isotope Analysis of Perfluorooctanoic Acid (PFOA) by Microflow-High Pressure Liquid Chromatography-Orbitrap Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
Wojtal PK, Davidheiser-Kroll B, Lane CS, Mead RN.   +3 more
europepmc   +1 more source

Characteristics of Natural Remanence Records in Fine‐Grained Particles Returned From Asteroid Ryugu

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Particles collected from the asteroid Ryugu by the Hayabusa2 spacecraft offer a unique opportunity to investigate the magnetic record of the primitive solar system, as any terrestrial magnetic contamination is minimal and can be accounted for.
Masahiko Sato, Yuki Kimura, Tadahiro Hatakeyama, Tomoki Nakamura, Satoshi Okuzumi, Sei‐ichiro Watanabe, Seiji Sugita, Satoshi Tanaka, Shogo Tachibana, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Yuichi Tsuda   +27 more
wiley   +1 more source