Navegação Artigos de Periódicos por Título
Resultados 28817-28836 de 37017
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Pulsating white dwarfs
(2017) [Artigo de periódico]The Sloan Digital Sky Survey has allowed us to increase the number of known white dwarfs by a factor of five and consequently the number of known pulsating white dwarfs also by a factor of five. It has also led to the ... -
Pulsation in the white dwarf HE 1017−1352
(2020) [Artigo de periódico]We report the detection of periodic variations on the Teff 32 000 K DA white dwarf star HE 1017−1352. We obtained time series photometry using the 4.1-m Southern Astrophysical Research telescope on three separate nights ... -
Pulse pressure variation and prediction of fluid responsiveness in patients ventilated with low tidal volume
(2012) [Artigo de periódico]OBJECTIVE: To determine the utility of pulse pressure variation (DRESPPP) in predicting fluid responsiveness in patients ventilated with low tidal volumes (VT) and to investigate whether a lower DRESPPP cut-off value should ... -
Pump-probe and pump-deplete-probe spectroscopies on carotenoids with N=9–15 conjugated bonds
(2006) [Artigo de periódico]A series of all-trans-carotenoids with N=9, 13, and 15 conjugated bonds has been studied by pump-probe and pump-deplete-probe spectroscopies to obtain a systematic analysis of the energy flow between the different electronic ... -
Punção aspirativa com agulha fina de nódulos de tireóde : análise da eficácia em 101 casos estudados
(1992) [Artigo de periódico]Doença nodular da tireóide ocorre em cerca de 5% da população de áreas não endêmicas. O risco de doença maligna nestes nódulos é, em geral, de 5% a 10%. A abordagem diagnóstica visa detectar os pacientes com maior risco ... -
Punção aspirativa por agulha fina em tumores cervicais
(2002) [Artigo de periódico]Introdução: Inúmeras são as patologias que podem se apresentar inicialmente como uma lesão em região cervical, o que torna o seu diagnóstico nem sempre simples. A punção aspirativa por agulha fina (PAAF) é um método simples, ... -
Punching above their weight : a network to understand broader determinants of increasing life expectancy
(2018) [Artigo de periódico]Background: Life expectancy initially improves rapidly with economic development but then tails off. Yet, at any level of economic development, some countries do better, and some worse, than expected – they either punch ... -
Pup age and aggressive behavior in lactating rats
(2000) [Artigo de periódico]High levels of aggressive behaviors against intruders in the nest area are displayed by female rats during the first 10 days after delivery, declining thereafter to very low levels, even though lactation continues. ... -
Pupipara (Diptera, Hippoboscidae) in wild birds attended at a rehabilitation center in southern Brazil
(2019) [Artigo de periódico]The hippoboscids are cosmopolitan permanent obligate hematophagous ectoparasites of birds, domestic and wild mammals and, occasionally, humans. Some species may act as vectors or hosts of etiological pathogenic agents. The ... -
Pure procrastination scale e irrational procrastination scale : validation of a brazilian version
(2021) [Artigo de periódico]This study aimed to adapt and validate the Irrational Procrastination Scale (IPS) and Pure Procrastination Scale (PPS) for Brazilian Portuguese. Therefore, 2666 university students were invited to participate in the study ... -
Puricelli biconvex arthroplasty : an experimental study in sheep
(2023) [Artigo de periódico]Background The aim of this study was to establish a sheep model of the Puricelli biconvex arthroplasty (ABiP) tech nique in sheep for evaluating its functional, biological and histological parameters. Methods Ten Corriedale ... -
Purification and binding analysis of the nitrogen fixation regulatory NifA protein from Azospirillum brasilense
(1998) [Artigo de periódico]NifA protein activates transcription of nitrogen fixation operons by the alternative s54 holoenzyme form of RNA polymerase. This protein binds to a well-defined upstream activator sequence (UAS) located at the -200/-100 ... -
Purification and characterization of a thermostable alkaline cellulase produced by Bacillus licheniformis 380 isolated from compost
(2017) [Artigo de periódico]During composting processes, the degradation of organic waste is accomplished and driven by a succession of microbial populations exhibiting a broad range of functional competencies. A total of 183 bacteria, isolated from ... -
Purinergic signaling in the modulation of redox biology
(2021) [Artigo de periódico]Purinergic signaling is a cell communication pathway mediated by extracellular nucleotides and nucleosides. Tri- and diphosphonucleotides are released in physiological and pathological circumstances activating purinergic ... -
Purple cabbage microgreens grown in different substrates and nutritive solution concentrations
(2019) [Artigo de periódico]Microgreens are young plants that are consumed at the seedling stage, which present short production cycle and require little space for growing. The objective of the present study was to evaluate the yield and nutritional ... -
Pursuing efficiency : international visibility of the scientific production of Brazilian graduate programs in child and adolescent health from 1998 through 2003
(2007) [Artigo de periódico]Objetivo: Avaliar a tendência do número de publicações oriundos dos programas de pós-graduação brasileiros em saúde da criança e do adolescente e a proporção de citações desses artigos no MEDLINE e no Journal Citation ... -
Pushing the ground-based limit : 14-μmag photometric precision with the definitive Whole Earth Telescope asteroseismic data set for the rapidly oscillating Ap star HR 1217
(2005) [Artigo de periódico]HR1217 is one of the best-studied rapidly oscillating Ap (roAp) stars, with a frequency spectrum of alternating even-and odd-l modes that are distorted by the presence of a strong, global magnetic field. Several recent ... -
Pushkin : o homem e o poeta
(1998) [Artigo de periódico] -
Push-out bond strength of calcium hydroxide and mineral trioxide aggregate based sealers to root canal dentin
(2012) [Artigo de periódico]Purpose: The adhesiveness of six root canal sealers: Acroseal, Endo CPM, Epiphany, White MTA, Sealapex and Sealer 26 to dentin, was evaluated in a push-out test design. Methods: Twenty eight roots of freshly extracted teeth ... -
Push-out bond strength of fiber posts to root dentin using glass ionomer and resin modified glass ionomer cements
(2014) [Artigo de periódico]Objective: The purpose of this study was to assess the push-out Bond strength of glass fiber posts to root dentin after cementation with glass ionomer (GICs) and resinmodified glass ionomer cements (RMGICs). Material and ...
