Results 101 to 110 of about 3,108 (177)

Decoding the Design Principles of Amino Acids and the Chemical Logic of Protein Sequences [PDF]

open access: yes, 2008
That only 20 amino acids occur naturally accounting for the structural and functional diversity of proteins remains a mystery. We show here that this is a consequence of the action of a symmetry group, identify the presence of hydrogen bond donor groups,
B. Jayaram
core   +1 more source

Behavior of Quillen (co)homology with respect to adjunctions

open access: yes, 2014
This paper aims to answer the following question: Given an adjunction between two categories, how is Quillen (co)homology in one category related to that in the other? We identify the induced comparison diagram, giving necessary and sufficient conditions
Frankland, Martin
core   +1 more source

El concepto de área [PDF]

open access: yes, 2006
Presentamos el concepto de área desde el punto de vista de Euclides, de Hilbert y lo comparamos con la presentación que se hace en algunos textos de la educación básica, media y ...
Luque, Carlos Julio   +2 more
core  

Assessment of fish diversity in the East China Sea hairtail national aquatic germplasm resources conservation zone using DNA barcoding

open access: yesGlobal Ecology and Conservation
Based on the fishery resource survey data from 2019 to 2022, the species composition and taxonomic diversity of fish in the East China Sea hairtail national aquatic germplasm resources conservation zone (ECSHZ) were studied through the analysis of 185 ...
Yufei Wang   +4 more
doaj   +1 more source

DNA analysis confirms the species Parachaetocladius lenferringtoni Bouchard et Namayandeh, 2024 (Chironomidae: Diptera)

open access: yesCHIRONOMUS Journal of Chironomidae Research
In this study, we confirm the status of Parachaetocladius lenferringtoni Bouchard et Namayandeh, 2024, using molecular evidence. Using distance-based ABGD, ASAP, and K2P techniques, we determined that the minimum interspecific distance between sequences
Armin Namayandeh   +2 more
doaj   +1 more source

Nucleon Spin Structure and Parton Distribution Functions

open access: yes, 2011
This article gives an overview over recent results on quark and gluon helicity distributions obtained in deep inelastic lepton nucleon scattering and proton proton interactions.
Pretz, Joerg
core  

Spin Physics with COMPASS [PDF]

open access: yes, 2005
COMPASS is a fixed target experiment at CERN studying the spin structure of the nucleon via deep inelastic muon-nucleon scattering. Hadron spectroscopy and structure are investigated using hadronic beams.
Pretz, Jörg
core  

La medida del círculo de Arquímedes: Figura y texto de la proposición 1 [PDF]

open access: yes
Starting from the generally recognised fact that Archimedes’ The Measurement of the Circle is not exactly the author’s own original and suffers from many transmission defects, it is proposed that the diagram from Proposition 1 is defective and can ...
Carrión López, Pedro
core   +1 more source

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