Webb25 feb. 2024 · Abstract. Impermanence is an ecological principle 1 but there are times when changes occur nonlinearly as abrupt community shifts (ACSs) that transform the ecosystem state and the goods and ... Webb18 feb. 2016 · Introduction. The world oceans have ~4350 phytoplankton species …
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Webb21 dec. 2009 · PMCID: PMC2806460 DOI: 10.1084/jem.20090847 Abstract Both the programmed death (PD) 1-PD-ligand (PD-L) pathway and regulatory T (T reg) cells are instrumental to the maintenance of peripheral tolerance. We demonstrate that PD-L1 has a pivotal role in regulating induced T reg (iT reg) cell development and sustaining iT reg … WebbColor Vision: From Genes to Perception. Contributors Foreword by Brian B. Boycott … Webbplanet Earth (R€ockstrom et al., 2009). Our knowledge of these transformations has … dfas leave sell back calculator