Results 31 to 40 of about 19,801,094 (386)

An encrusting kleptoparasite-host interaction from the early Cambrian

Nature Communications, 2020
Parasitic interactions are difficult to document in the fossil record. Here, Zhang et al. analyze a large population of a Cambrian brachiopod and show it was frequently encrusted by tubes aligned to its feeding currents and that encrustation was ...
Zhifei Zhang, Luke C. Strotz, Timothy P. Topper, Feiyang Chen, Yanlong Chen, Yue Liang, Zhiliang Zhang, Christian B. Skovsted, Glenn A. Brock   +8 more
doaj   +1 more source

Intracellular bound chlorophyll residues identify 1 Gyr-old fossils as eukaryotic algae

Nature Communications, 2022
The authors report nickel-porphyrins derivatives of chlorophyll in ~1 Gyr-old multicellular eukaryotes, preserved in low-grade metamorphic rocks. This brand new approach permits to identify early phototrophic organisms through the geological record.
Marie Catherine Sforna, Corentin C. Loron, Catherine F. Demoulin, Camille François, Yohan Cornet, Yannick J. Lara, Daniel Grolimund, Dario Ferreira Sanchez, Kadda Medjoubi, Andrea Somogyi, Ahmed Addad, Alexandre Fadel, Philippe Compère, Daniel Baudet, Jochen J. Brocks, Emmanuelle J. Javaux   +15 more
doaj   +1 more source

Early-Life Environmental Exposures and Childhood Obesity: An Exposome-Wide Approach

Environmental Health Perspectives, 2020
Background: Chemical and nonchemical environmental exposures are increasingly suspected to influence the development of obesity, especially during early life, but studies mostly consider single exposure groups.
M. Vrijheid, S. Fossati, L. Maitre, Sandra Marquez, T. Roumeliotaki, L. Agier, S. Andrušaitytė, Solène Cadiou, M. Casas, M. de Castro, A. Dėdelė, David Donaire-Gonzalez, R. Gražulevičienė, L. Haug, R. McEachan, H. Meltzer, Eleni Papadopouplou, O. Robinson, A. Sakhi, V. Siroux, J. Sunyer, P. Schwarze, I. Tamayo-Uria, José Urquiza, M. Vafeiadi, Antònia Valentín, C. Warembourg, John Wright, M. Nieuwenhuijsen, C. Thomsen, X. Basagaña, R. Slama, L. Chatzi   +32 more
semanticscholar   +1 more source

MAIT cells are imprinted by the microbiota in early life and promote tissue repair

Science, 2019
Commensals rule the MAITrix Mucosal-associated invariant T (MAIT) cells play an important role in mucosal homeostasis. MAIT cells recognize microbial small molecules presented by the major histocompatibility complex class Ib molecule MR1.
Michael G. Constantinides, Verena M. Link, Samira Tamoutounour, Andrea C. Wong, P. J. Pérez-Chaparro, Seong-Ji Han, Y. E. Chen, Kelin Li, S. Farhat, Antonin Weckel, S. Krishnamurthy, Ivan Vujkovic-Cvijin, Jonathan L. Linehan, N. Bouladoux, E. Merrill, Sobhan Roy, D. Cua, E. Adams, A. Bhandoola, T. Scharschmidt, J. Aubé, M. Fischbach, Y. Belkaid   +22 more
semanticscholar   +1 more source

Effects of Early-Life Stress on the Brain and Behaviors: Implications of Early Maternal Separation in Rodents

International Journal of Molecular Sciences, 2020
Early-life stress during the prenatal and postnatal periods affects the formation of neural networks that influence brain function throughout life. Previous studies have indicated that maternal separation (MS), a typical rodent model equivalent to early ...
M. Nishi
semanticscholar   +1 more source

Early life factors and risk of childhood rhabdomyosarcoma. [PDF]

, 2013
Although little is known about etiology of childhood rhabdomyosarcoma (RMS), early life factors are suspected in the etiology. We explored this hypothesis using linked data from the California Cancer Registry and the California birth rolls.
Anshu eShrestha, Anshu eShrestha, Beate eRitz, Christina A Lombardi, Julia eHeck, Michelle eWilhelm, Simona eOgnjanovic   +6 more
core   +2 more sources

The Social Ecology of Childhood and Early Life Adversity

Pediatric Research, 2020
An increasing prevalence of early childhood adversity has reached epidemic proportions, creating a public health crisis. Rather than focusing only on adverse childhood experiences (ACEs) as the main lens for understanding early childhood experiences ...
Marcela Lopez, Mónica O Ruiz, C. Rovnaghi, G. Tam, Jitka Hiscox, I. Gotlib, D. Barr, V. Carrion, K. Anand   +8 more
semanticscholar   +1 more source

Reconstruction of the first consumer-driven marine ecosystem on Earth, perspectives from early Cambrian small skeletal fossils from China [PDF]

Estonian Journal of Earth Sciences, 2023
Biological activity was the major triggering factor driving Earth’s organic and inorganic cycles across the biosphere, lithosphere, and atmosphere. A key question in the evolution of Earth’s ecosystem is when and how different animals emerged and ...
Zhifei Zhang, Yue Liang, Fan Liu, Yazhou Hu, Lars E. Holmer   +4 more
doaj   +1 more source

Timing of poverty in childhood and adolescent health: Evidence from the US and UK [PDF]

, 2018
Childhood poverty is associated with poorer adolescent health and health behaviours, but the importance of the timing of poverty remains unclear.
Crosnoe, Robert, Green, Michael J., Popham, Frank, Smith, Chelsea, Stritzel, Haley   +4 more
core   +1 more source

Hyolithid-like hyoliths without helens from the early Cambrian of South China, and their implications for the evolution of hyoliths

BMC Ecology and Evolution, 2022
Background A small hyolith, with a triangular operculum and a conical-pyramidal conch with a sharp apex, originally documented as Ambrolinevitus ventricosus, is revised based on new material from the Chengjiang biota.
Fan Liu, Christian B. Skovsted, Timothy P. Topper, Zhifei Zhang   +3 more
doaj   +1 more source