Results 111 to 120 of about 101,472 (247)

Stable isotopes in diatom silica [PDF]

, 2010
Diatom silica is a form of biogenic opal (SiO2.nH2O, Figure 1) containing oxygen, silicon, carbon and nitrogen isotopes that can be used in lacustrine and marine paleoenvironmental studies.
Leng, Melanie J., Swann, George E.A.
core  

isotope ratio mass spectrometry

Citation: 'isotope ratio mass spectrometry' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.12453 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual ...
openaire   +1 more source

Cinnamic‐Hydroxamic‐Acid Derivatives Exhibit Antibiotic, Anti‐Biofilm, and Supercoiling Relaxation Properties by Targeting Bacterial Nucleoid‐Associated Protein HU

Advanced Science, EarlyView.
Cinnamic‐hydroxamic‐acid derivatives (CHADs) are identified as novel inhibitors of the bacterial nucleoid‐associated protein HU, exhibiting potent antibacterial, anti‐biofilm (both inhibition and eradication), and DNA relaxation (anti‐supercoiling) activities. Moreover, CHADs demonstrate strong synergistic effects with multiple antibiotics.
Huan Chen, Yingqi Xu, Zhaoping Xiong, Hongliang Wang, Xin Wang, Yue Kang, Zhonglin Wang, Xiaoyan Zeng, Yahui Liu, Yehuan Zheng, Wei Chen, Mengzhe Li, Zhenyue Hu, Chi Xu, Yue Wu, Yawen Wang, Zuyi Yuan, Shuai Yuan, Huadong Liu, Steve Matthews, Nan Qiao, Yan Li, Bing Liu   +22 more
wiley   +1 more source

Advances in Oxygen Isotope Analysis of Phosphate by Electrospray Orbitrap Mass Spectrometry for Studying the Microbial Metabolism of Microorganisms

CHIMIA
Understanding the impact of human activities on the metabolic state of soil and aquatic environments is of paramount importance to implement measures for maintaining ecosystem services. Variations of naturalabundance 18O/16O ratios in phosphate have been
Nora M. Bernet, Thomas B. Hofstetter
doaj   +1 more source

Testing the 87Sr/86Sr isotopic ratio measured by ICP-MS as a tracer for inter-well investigation in oil reservoirs

EPJ Web of Conferences, 2013
The use of the 87Sr/86Sr isotope ratio has been tested as a natural tracer for inter-well tests in oil reservoirs using standard mass-spectrometry equipment. Such an application can have a special interest to offshore oil fields.
Palmieri H.E.L., dos Santos M.E., Moreira R.M.   +2 more
doaj   +1 more source

Balanced Expression of the Diiron Oxygenase BioE Is Essential for Biotin Homeostasis in Elizabethkingia meningoseptica

Advanced Science, EarlyView.
BioE is a new diiron oxygenase that catalyzes the conversion of long‐chain acyl groups into pimeloyl thioester, initiating biotin synthesis. The overexpression of EmBioE disrupts lipid metabolic homeostasis, requiring repressor BioL to maintain a balance between long‐chain fatty acids and biotin synthesis.
Meng Zhang, Ying‐ying Fu, Xiaoqiang Yang, Qiuying Qin, Xinyu Su, Jiaming Fang, Yanhua Kang, Qingwen He, Zhi Ruan, Yongchang Xu   +9 more
wiley   +1 more source

Binding to medium and long chain fatty acyls is a common property of HEAT and ARM repeat modules. [PDF]

, 2019
Covalent post-translational modification (PTM) of proteins with acyl groups of various carbon chain-lengths regulates diverse biological processes ranging from chromatin dynamics to subcellular localization.
Chua, Katrin F, Coan, John P, Elias, Joshua E, Gozani, Or, Krajewski, Krzysztof, Li, Tie-Mei, Strahl, Brian D, Zhang, Lichao   +7 more
core   +1 more source

Aberrant SUMOylation Restricts the Targetable Cancer Immunopeptidome

Advanced Science, EarlyView.
Pharmacological SUMOylation inhibition (SUMOi) counteracts tumor immune evasion by unmasking an immunogenic HLA‐I peptide and neoepitope repertoire. By restoring HLA‐I ligand availability through increased antigen processing and presentation, enhanced proteasomal cleavage, and modulated TAP1 peptide affinity, SUMOi boosts tumor immunogenicity ...
Uta M. Demel, Anna Meurer, Badeel Kh. Q. Zaghla, Bilge Atay, Daniel Steiert, Luca V. Hummel, Konstandina Isaakidis, Chuanbing Zang, Michael Korenkov, Marlon Schielin, Schayan Yousefian, Shima Mecklenbräuker, Marieluise Kirchner, Simon Haas, Antonia Busse, Philipp Mertins, Stefan Müller, Matthias Wirth, Martin G. Klatt, Ulrich Keller   +19 more
wiley   +1 more source

Assessing applicability of isotope-ratio mass spectrometry (IRMS) for geographical identification of whole milk

Ветеринария сегодня, 2018
Applicability of isotope-ratio mass spectrometry of light elements (C, N, О, H) has been assessed for identification of geographical origin of Russian milk collected in different parts of the Russian Federation (235 sample of whole milk).
I. V. Podkolzin, A. I. Solovyev
doaj  

Comparative analysis of conventional and IRMS techniques for honey adulteration detection in accordance with ISIRI standards

BMC Research Notes
Objective This study assesses the comparative performance of Isotope Ratio Mass Spectrometry (IRMS) and conventional techniques in detecting honey adulteration.
Abbas Alimoradian, Nafiseh Khansari, Mahdi Abdollahi, Behnoosh Ansari Asl, Sonia Asadi, Akbar Yousefi Maghool, Arash Rabiei, Ali Khademi, Mohsen Shamsi   +8 more
doaj   +1 more source