Results 151 to 160 of about 4,448 (271)
Ibis, Volume 168, Issue 3, Page 1002-1015, July 2026.Moult strategies in birds can vary considerably even within a single species, particularly in terms of where moulting takes place. Yet, the factors underlying this variation and its consistency across years and individuals remain poorly understood. One such strategy, moult migration, involves individuals moving to a specific moulting location amid ...
Elza Marija Zacmane +8 more
wiley +1 more source
Photosynthetic primary production in the Mesoproterozoic
New Phytologist, Volume 251, Issue 1, Page 64-80, July 2026.Summary The Mesoproterozoic atmosphere had more CO2 and less O2 than at present. While the upper ocean was oxygenated, the deeper ocean was euxinic or ferruginous. Primary production was performed by Chlorobia, Cyanobacteria, Proteobacteria, and Archaeplastida.
Patricia Sánchez‐Baracaldo +1 more
wiley +1 more source
ISOTOPIC FRACTIONATION OF SULFUR IN GYPSUM CRYSTALS
Chinese Journal of Applied Chemistry, 1989 Jianzhuang Jiang, Qinglian(T. Zhang
openaire +1 more source
Anthropogenic Carbon Isotope Signals in North Atlantic Water Masses at 48°N
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract Deep‐water masses are formed in the North‐Atlantic, making studies of δ13C of dissolved CO2 in this region key to monitor and understand the spreading of anthropogenic carbon into the ocean interior. The objective of this study is to quantify the Suess effect (SE) in North Atlantic water masses using sulfur hexafluoride (SF6) as the ...
E. Bavoux +5 more
wiley +1 more source
Equilibrium Fractionation of Sulfur Isotopes
, 1969 The existence of significant and consistent fractionation of sulfur isotopes in natural coexisting sulfide mineral pairs is demonstrated. Such fractionations are shown to depend exclusively on the mineralogy of the assemblage and temperature of ...
Grootenboer, John
core
Racemisation of Amino Acids: From Synthetic Challenge to Biological Significance
ChemBioChem, Volume 27, Issue 11, 15 June 2026.Racemisation, once considered an undesirable synthetic side reaction, also occurs naturally in amino acids and influences biological processes. Evidence links stereochemical conversion to ageing, protein turnover, and cellular development. This review examines mechanisms, control strategies in synthesis, applications and implications in physiology ...
Othman Al Musaimi
wiley +1 more source
The oxygen isotope equilibrium fractionation between sulfite species and water
, 2013 Sulfite is an important sulfoxy intermediate in oxidative and reductive sulfur cycling in the marine and terrestrial environment. Different aqueous sulfite species exist, such as dissolved sulfur dioxide (SO2), bisulfite (HSO3), pyrosulfite (S2O52) and ...
Breuer, C. +4 more
core
Fractionation of Stable Carbon Isotopes during Chemoautotrophic Growth of Sulfur-Oxidizing Bacteria [PDF]
, 1987 Edward G. Ruby +2 more
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ChemMedChem, Volume 21, Issue 11, 15 June 2026.A synthetic methodology for the preparation of asymmetric benzene‐1,4‐disulfonamides was developed and applied to generate potential anti‐dengue virus (DENV) compounds. Guided by computer‐assisted structural rationalization, we designed synthetically more accessible analogs with reduced toxicity that interact with the DENV NS5 domain, thereby ...
Jakub Janáč +8 more
wiley +1 more source