Results 31 to 40 of about 1,099,029 (313)

Natural Selection and Morality [PDF]

Ideas y Valores, 2006
Resumen:En este ensayo abordo los intentos, relativamente recientes, de dar una explicación de la moralidad como adaptación por selección natural. Mi exposición tiene una introducción y cuatro partes: en la primera explico en qué consiste la paradoja del
Alejandro Rosas
doaj  

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Teoria social e biologia: perspectivas e problemas da introdução do conceito de história nas ciências biológicas Social Theories and Biology: perspectives and problems of the introduction of the historical concept into biological sciences

História, Ciências, Saúde: Manguinhos, 2001
A teoria da evolução por seleção natural de Charles Darwin, ao relacionar os seres vivos genealogicamente, interpreta as espécies e sua fantástica diversidade como uma história de transformações lentas e graduais.
Ricardo Waizbort
doaj   +1 more source

Genomic Legacies of Ancient Adaptation Illuminate GC-Content Evolution in Bacteria

Microbiology Spectrum, 2023
Bacterial evolution is characterized by strong purifying selection as well as rapid adaptive evolution in changing environments. In this context, the genomic GC content (genomic GC) varies greatly but presents some level of phylogenetic stability, making
Wenkai Teng, Bin Liao, Mengyun Chen, Wensheng Shu   +3 more
doaj   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

FEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil, Anna Corrà, Annalisa Scapolatiello, Chengxiang Qiu, Gianluca Amadei   +4 more
wiley   +1 more source

Structure and evolution of the squamate major histocompatibility complex as revealed by two Anolis lizard genomes

Frontiers in Genetics, 2022
The major histocompatibility complex (MHC) is an important genomic region for adaptive immunity and has long been studied in ecological and evolutionary contexts, such as disease resistance and mate and kin selection.
Daren C. Card, Daren C. Card, Andrew G. Van Camp, Andrew G. Van Camp, Trenten Santonastaso, Michael I. Jensen-Seaman, Nicola M. Anthony, Scott V. Edwards, Scott V. Edwards   +8 more
doaj   +1 more source

Biophysical approaches for studying viral entry

FEBS Letters, EarlyView.
Viruses infect all living organisms and have been responsible for major epidemics and pandemics. Their ongoing evolutionary battle with host defenses creates a constant need for improved tools to study viral behavior. Advancing methods to probe viral attachment, fusion, and genome release deepen our understanding of how infections begin and support the
Inbar Yosibash, Raya Sorkin
wiley   +1 more source

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

The pyruvate generator is a common phenomenon in mitochondria from different rat and mouse brain regions

FEBS Letters, EarlyView.
The pyruvate generator, which causes activation of respiration by extra‐mitochondrial Ca2+, is also present and functional in rat brainstem mitochondria, as it is in other brain regions. This finding is confirmed by experiments with a fully reconstituted malate–aspartate shuttle (MAS).
Grazyna Debska‐Vielhaber, Niki Karavasili, Matthias Kunz, Zemfira Gizatullina, Timur Gainutdinov, Stefan Vielhaber, Wolfram S. Kunz, Frank N. Gellerich   +7 more
wiley   +1 more source

The interaction of resource use and gene flow on the phenotypic divergence of benthic and pelagic morphs of Icelandic Arctic charr (Salvelinus alpinus)

Ecology and Evolution, 2021
Conceptual models of adaptive divergence and ecological speciation in sympatry predict differential resource use, phenotype–environment correlations, and reduced gene flow among diverging phenotypes.
Matthew K. Brachmann, Kevin Parsons, Skúli Skúlason, Moira M. Ferguson   +3 more
doaj   +1 more source