Results 11 to 20 of about 870,776 (361)

Scale and information-processing thresholds in Holocene social evolution

open access: yesNature Communications, 2020
The Seshat database has made it possible to reveal large-scale patterns in human cultural evolution. Here, Shin et al. investigate transitions in social complexity and find alternating thresholds of polity size and information processing required for ...
Jaeweon Shin   +5 more
doaj   +1 more source

Nonlocal Schrödinger equations in metric measure spaces [PDF]

open access: yes, 2015
In this note we consider the pointwise convergence to the initial data for the solutions of some nonlocal dyadic Schrödinger equations on spaces of homogeneous type. We prove the a.e. convergence when the initial data belongs to a dyadic version of an L2
Actis, Marcelo Jesús   +3 more
core   +1 more source

Microwave-assisted embedding of bis-vanillin and bis-eugenol into SBA-15: Synthesis of chemosensors precursors for the detection of metal cations [PDF]

open access: yes, 2017
In this work we evaluate the necessary experimental conditions to carry out the embedding of bis-vanillin and bis-eugenol, two potential precursors of chemosensors, in the porous structure of the mesoporous silica SBA-15 through a microwave assisted ...
Espinoza Martinez, Dailenys   +4 more
core   +1 more source

Study of the Cys-His bridge electron transfer pathway in a copper-containing nitrite reductase by site-directed mutagenesis, spectroscopic, and computational methods [PDF]

open access: yes, 2018
The Cys-His bridge as electron transfer conduit in the enzymatic catalysis of nitrite to nitric oxide by nitrite reductase from Sinorhizobium meliloti 2011 (SmNir) was evaluated by site-directed mutagenesis, steady state kinetic studies, UV-vis and EPR ...
Brondino, Carlos Dante   +7 more
core   +1 more source

Conversión de prueba cutánea de derivado proteico purificado durante el tratamiento con anti-TNF-α

open access: yesRevista Argentina de Reumatología, 2021
Introducción: los anti-TNF-α se asocian con mayor riesgo de desarrollar tuberculosis (TB). La prueba del derivado proteico purificado (purified protein derivative, PPD) se emplea para diagnosticar infección de tuberculosis latente (ITL).
Brian Marcelo Abdala   +15 more
doaj   +1 more source

Iterative design of dynamic experiments in modeling for optimization of innovative bioprocesses [PDF]

open access: yes, 2009
Finding optimal operating conditions fast with a scarce budget of experimental runs is a key problem to speed up the development and scaling up of innovative bioprocesses. In this paper, a novel iterative methodology for the model-based design of dynamic
Cristaldi, Mariano Daniel   +2 more
core   +1 more source

Carcinomatosis peritoneal en cáncer de pulmón: revisión de la literatura con reporte de caso

open access: yesRespirar, 2023
En Colombia, para 2020, el cáncer de pulmón se reportó como la segunda neoplasia con mayor incidencia y la primera con mayor tasa de mortalidad según las cifras del ministerio de salud de Colombia.
Ivan Triana   +5 more
doaj   +1 more source

Serum 25-hydroxyvitamin D levels in hospitalized adults with community-acquired pneumonia [PDF]

open access: yes, 2018
Introduction: Community‐acquired pneumonia (CAP) is the infectious disease with the highest number of deaths worldwide. Several studies have shown an association between vitamin D deficiency and increases susceptibility to respiratory tract infections ...
Bool   +27 more
core   +1 more source

Thermodynamics of computing with circuits

open access: yesNew Journal of Physics, 2020
Digital computers implement computations using circuits, as do many naturally occurring systems (e.g., gene regulatory networks). The topology of any such circuit restricts which variables may be physically coupled during the operation of the circuit. We
David H Wolpert, Artemy Kolchinsky
doaj   +1 more source

Reinstatement of rhipicephalus (Boophilus) australis (Acari: Ixodidae) with redescription of the adult and larval stages [PDF]

open access: yes, 2012
Rhipicephalus australis Fuller, the Australian cattle tick, is reinstated and the adults and larvae redescribed from material collected in Australia. This long ignored boophilid was previously known as R.
de la Fuente, José   +6 more
core   +1 more source

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