Results 61 to 70 of about 1,572,221 (316)

Dynamical and chemical evolution of NGC1569

, 2005
Blue Compact Dwarf and Dwarf Irregular galaxies are generally believed to be unevolved objects, due to their blue colors, compact appearance and large gas fractions.
Aguirre, Aloisi, Aloisi, Alvensleben, Anders, Angeretti, Aparicio, Arnone, Arp, Babul, Blitz, Bradamante, Böhringer, Centurión, Chiappini, Chiappini, Chiappini, Ciotti, D'Ercole, de Heij, de Marchi, Dyson, Ellis, F. Matteucci, Fagotto, Finoguenov, G. Hensler, Gallagher, Gastaldello, Gibson, Greggio, Heckman, Henry, Herwig, Israel, Izotov, Izotov, Izotov, Kennicutt, Kobulnicky, Kobulnicky, Kunth, Köppen, L. Angeretti, Lilly, Loewenstein, Marcolini, Marconi, Marconi, Martin, Martin, Masegosa, Matsushita, Matteucci, Matteucci, Meynet, Momany, Mori, Mori, Mühle, Mühle, Olofsson, Origlia, Ostriker, Ott, Pagel, Pilyugin, Pipino, Pipino, Reakes, Recchi, Recchi, Recchi, Renzini, Renzini, Roediger, Romano, Ruiz-Lapuente, S. Recchi, Searle, Skillman, Spite, Sternberg, Stil, Stil, Tinsley, Tosi, Tozzi, Vallenari, van den Hoek, van Zee, Vílchez, Weidner, Woosley, Östlin   +94 more
core   +1 more source

Evolution of associative learning in chemical networks [PDF]

, 2012
Organisms that can learn about their environment and modify their behaviour appropriately during their lifetime are more likely to survive and reproduce than organisms that do not. While associative learning – the ability to detect correlated features of
A Gopnik, A Hjelmfelt, A Mitchell, Abigail Morrison, C Fernando, C Fernando, C Fernando, Chrisantha Fernando, D Bray, D Bray, E Bingham, E Libby, ET Walters, G Nilsonne, H Jaeger, I Tagkopoulos, K Dale, K Dunlap, M Parter, MC Gustin, MO Magnasco, N Gandhi, P Phattanasri, Phil Husbands, R Eckert, R Goldstein, Simon McGregor, SR Bergström, SR Bergström, SR Paladugu, T Hennessey, V Vasas, Vera Vasas, W Fontana, W Maass, W Maass   +35 more
core   +5 more sources

The cytoskeletal control of B cell receptor and integrin signaling in normal B cells and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
In lymphoid organs, antigen recognition and B cell receptor signaling rely on integrins and the cytoskeleton. Integrins act as mechanoreceptors, couple B cell receptor activation to cytoskeletal remodeling, and support immune synapse formation as well as antigen extraction.
Abhishek Pethe, Tanja Nicole Hartmann
wiley   +1 more source

The Mystery of Homochirality on Earth

Life
Homochirality is an obvious feature of life on Earth. On the other hand, extraterrestrial samples contain largely racemic compounds. The same is true for any common organic synthesis.
Michael G. Weller
doaj   +1 more source

THE PROTOBIOLOGICAL THEORY OF CEILINGS AND FLOORS, OR CHEMICAL EVOLUTION AS A PLANETARY PROCESS [PDF]

Filozofia i Nauka
The article presents a modern protobiological theory based on the classical archetype. It connects the issues of origins of life with the theory of the hierarchy of matter and recognizes that error correction occurs within hierarchical and dynamic living
Alicja Kubica
doaj   +1 more source

Chemical Evolution of a Bacterium’s Genome [PDF]

Angewandte Chemie International Edition, 2011
We set out to develop a generic technology for evolving the chemical constitution of microbial populations by using the simplest possible algorithm. Extant living cells polymerize a restricted set of nucleic acid precursors, namely, four nucleoside triphosphates (UTP, CTP, ATP, GTP) and four deoxynucleoside triphosphates (dTTP, dCTP, dATP, dGTP ...
Madeleine Bouzon, Volker Döring, Piet Herdewijn, Sabine Tricot, Sabine Tricot, Philippe Marlière, Rupert Mutzel, Stéphane Cruveiller, Stéphane Cruveiller, Julien Patrouix   +9 more
openaire   +4 more sources

A stepwise emergence of evolution in the RNA world

FEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Cosmological implications of dwarf spheroidal chemical evolution [PDF]

, 2006
The chemical properties of dwarf spheroidals in the local group are shown to be inconsistent with star formation being truncated after the reionization epoch (z~8).
Brad K. Gibson, Dehnen W., Kroupa P., Maria Lugaro, Matteucci F., Roberto Gallino, Schaller G., Thielemann F.-K., Tian K. P., Yeshe Fenner   +9 more
core   +1 more source

B cell mechanobiology in health and disease: emerging techniques and insights into therapeutic responses

FEBS Letters, EarlyView.
B cells sense external mechanical forces and convert them into biochemical signals through mechanotransduction. Understanding how malignant B cells respond to physical stimuli represents a groundbreaking area of research. This review examines the key mechano‐related molecules and pathways in B lymphocytes, highlights the most relevant techniques to ...
Marta Sampietro, Marco Cellani, Cristina Scielzo   +2 more
wiley   +1 more source

How Was Nature Able to Discover Its Own Laws—Twice?

Life, 2021
The central thesis of the modern scientific revolution is that nature is objective. Yet, somehow, out of that objective reality, projective systems emerged—cognitive and purposeful.
Addy Pross
doaj   +1 more source