Results 51 to 60 of about 34,873 (245)

How Well Do We Know VPDB-Part 2: Interlaboratory Assessment of Existing δ¹³C_VPDB Reference Materials. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale In January 2024, the IAEA experts meeting endorsed both δ13C scales that are currently used within the scientific community: the Vienna Peedee belemnite (VPDB) δ13C scale defined by NBS 19 with a value of +1.95‰ exactly, and the VPDB‐LSVEC scale defined by NBS 19 and the lithium carbonate LSVEC with a value of −46.60‰ exactly ...
Moossen H, Steur PM, Camin F, Krajnc B, Enke A, Geilmann H, Paul D, Lange M, von Rein I, Meijer HAJ.   +9 more
europepmc   +2 more sources

Arginine Methylation Antagonizes TEAD3‐Mediated Repression to Promote Osteogenic Differentiation by Disrupting RUNX2‐Sequestrating Condensates

Advanced Science, EarlyView.
In the unmethylated state, TEAD forms stable, repressive condensates that sequester the osteogenic master regulator RUNX2. Arginine methylation of TEAD at R55 acts as a molecular brake, dissolving these condensates to release RUNX2 and activate the osteogenic program.
Lei Cao, Ruohui Han, Hui Xiong, Qian Li, Shaofei Tao, Xudong Wu, Dayong Liu   +6 more
wiley   +1 more source

Directional Regulation of Zinc Deposition Through Constructing Hierarchical Janus Carbon Matrix with Organic‐Decorated Multi‐Channels

Advanced Science, EarlyView.
A Janus carbon matrix is engineered by covalently anchoring organic sulfonic anions within tubular pores of hierarchical CMK‐5, serving as an interfacial layer for Zn metal anodes. This design establishes a charge gradient for Zn2+ diffusion, enabling the directional deposition of confined and uniform Zn inside the pores while suppressing parasitic ...
Li Gao, Hongli Chen, Dongfang Li, Chen Qian, Chao Yuan, Bin Yu, Jitraporn Vongsvivut, Bernt Johannessen, Lingfei Zhao, Yaojie Lei, Hong Gao, Yufei Zhao, Jinqiang Zhang, Guoxiu Wang, Hao Liu   +14 more
wiley   +1 more source

Nitrogen isotope analysis of ammonium and glycine [PDF]

, 2005
Stable isotope techniques can be used as a tool in nitrogen cycling studies of different ecosystems. The studies are based on measurement of the heavy (15N)- to- light (14N) isotopic ratios of nitrogen in different biospheric pools.
Norlin, Elin
core  

Distinct effects of complement C4A and C4B copy number in Systemic Sclerosis serological and clinical subtypes

Arthritis &Rheumatology, Accepted Article.
Objective Complement component 4 (C4), encoded by C4A and C4B within the major histocompatibility complex (MHC) on chromosome 6, regulates the immune response and clears immune complexes. Variable copy number (CN) of C4 genes and retroviral HERV‐K element influence its function.
Javier Martínez‐López, Carlos Rangel‐Peláez, Inmaculada Rodriguez‐Martin, Alfredo Guillen‐Del‐Castillo, Carmen P Simeón‐Aznar, José L Callejas, International SSc Group; PRECISESADs Clinical Consortium, Oliver Distler, Susanna M Proudman, Mandana Nikpour, Australian Scleroderma Interest Group (ASIG), Nicolas Hunzelmann, Gianluca Moroncini, Jeska K de Vries‐Bouwstra, Ariane L Herrick, Yannick Allanore, Marta E. Alarcon‐Riquelme, Lorenzo Beretta, Shervin Assassi, Christopher P Denton, Maureen D Mayes, Javier Martin, Marialbert Acosta‐Herrera, Martin Kerick   +23 more
wiley   +1 more source

Essential work, invisible workers: The role of digital curation in COVID‐19 Open Science

Journal of the Association for Information Science and Technology, Volume 76, Issue 4, Page 703-717, April 2025.
Abstract In this paper, we examine the role digital curation practices and practitioners played in facilitating open science (OS) initiatives amid the COVID‐19 pandemic. In Summer 2023, we conducted a content analysis of available information regarding 50 OS initiatives that emerged—or substantially shifted their focus—between 2020 and 2022 to address ...
Irene V. Pasquetto, Amina A. Abdu, Natascha Chtena   +2 more
wiley   +1 more source

Short-term nitrous oxide emissions from pasture soil as influenced by urea level and soil nitrate [PDF]

, 2004
Nitrogen excreted by cattle during grazing is a significant source of atmospheric nitrous oxide (N2O). The regulation of N2O emissions is not well understood, but may vary with urine composition and soil conditions.
Christofides, Calliopi, Petersen, Søren O., Stamatiadis, Stamatis   +2 more
core   +1 more source

Expression, Purification, and Microscopy‐Based Assays for Engineered Recombinant Tyrosinated, Detyrosinated, and Δ2 Human Tubulin

Cytoskeleton, EarlyView.
ABSTRACT Microtubules are noncovalent polymers assembled from α/β tubulin dimers. Their structure, dynamics and interaction with effectors are regulated through the expression of diverse tubulin isotypes and chemically diverse posttranslational modifications, also known as the “tubulin code.” Understanding the biophysical correlates between tubulin ...
Jiayi Chen, Agnieska Szyk, Antonina Roll‐Mecak   +2 more
wiley   +1 more source

Visualising gas heating from an RF plasma loudspeaker [PDF]

, 2010
In an electro-acoustic transduction mechanism, an ac modulation (here in the audio frequency range) of the electric field in an atmospheric pressure air plasma gives rise to a rapid increase in the gas temperature and dimensions of the gas volume.
Braithwaite, N. St.J, Johnson, P. C., Moore, J., Naidis, G. V., Sharp, D., Sutton, Y.   +5 more
core  

Solving the woolly mammoth conundrum: amino acid 15N-enrichment suggests a distinct forage or habitat [PDF]

, 2015
Understanding woolly mammoth ecology is key to understanding Pleistocene community dynamics and evaluating the roles of human hunting and climate change in late Quaternary megafaunal extinctions. Previous isotopic studies of mammoths’ diet and physiology
Longstaffe, Fred J, Metcalfe, Jessica Z, Schwartz-Narbonne, Rachel, Zazula, Grant   +3 more
core   +2 more sources