601 research outputs found
GENETIC EVALUATION OF SEED GERMINATION AND DEVELOPMENT OF SEEDLINGS IN Ormosia excelsa Benth
The aim of this study was to estimate the genetic parameters of Ormosia excelsa seeds based on germination traits, at different temperatures, in order to facilitate the selection of superior varieties of seeds for producing seedlings. Twenty six progenies collected in the municipality of Autazes (state of Amazonas, Brazil) were evaluated. The experiment was completely randomized, with four replications and 25 seeds per plot, totaling 100 seeds per progeny. The germination rate, mean germination time and the synchronization and speed germination indexes were determined at the temperatures of 30 and 35 °C. Seedling development was also evaluated under nursery conditions. The progenies of O. excelsa showed significant genetic variability for all traits. Both temperatures proved to be effective in producing germination close to 87%. Germination began between 1 and 4 days after sowing. However, for greater efficiency in the selection of superior progenies, each environment should be considered individually. The high heritability values obtained (> 65%) and the high genetic correlation favorable for selection, among all traits, resulted in significant gains according to the selection process used. Our results indicated that determining superior progenies for height and number of leaves was possible based on a single evaluation. The fact that 100% of seedlings planted in the field survived promotes a promising outlook to set up commercial nurseries for the species.The aim of this study was to estimate the genetic parameters of Ormosia excelsa seeds based on germination traits, at different temperatures, in order to facilitate the selection of superior varieties of seeds for producing seedlings. Twenty six progenies collected in the municipality of Autazes (state of Amazonas, Brazil) were evaluated. The experiment was completely randomized, with 4 replications and 25 seeds per plot, totaling 100 seeds per progeny. The germination rate, mean germination time and the synchronization and speed germination indexes were determined at the temperatures of 30 and 35 °C. Seedling development was also evaluated under nursery conditions. The progenies of O. excelsa showed significant genetic variability for all traits. Both temperatures proved to be effective in producing germination close to 87%. Germination began between 1 and 4 days after sowing. However, for greater efficiency in the selection of superior progenies, each environment should be considered individually. The high heritability values obtained (> 65%) and the high genetic correlation favorable for selection, among all traits, resulted in significant gains according to the selection process used. Our results indicated that determining superior progenies for height and number of leaves was possible based on a single evaluation. The fact that 100% of seedlings planted in the field survived promotes a promising outlook to set up commercial nurseries for the species
Narcisismo, pró-sociabilidade e agressão: o papel mediador da empatia
This study aimed to investigate the mediating role of empathy, considering narcissism as a predictor variable in two different models, with pro-sociality as the dependent variable in the first and dimensions of agression in the second. The sample was composed of 205 respondents from João Pessoa (M = 27.43, SD = 9.13). We used the Single-Item Narcissism Scale, the Multidimensional Interpersonal Reactivity Scale, the Pro-Sociability Scale, the Aggression Questionnaire, and a sociodemographic questionnaire. The data were processed using IBM SPSS and AMOS through descriptive and inferential analyses (correlations and mediation). The main results pointed to negative direct effects of narcissism on empathy and pro-social behavior and to direct positive effects on aggression. Furthermore, it was confirmed that empathy has a mediating role in the relation between narcissism and pro-sociability, which was not found for the relation between narcissism and aggression. These findings corroborate previous studies and contribute to the comprehension of the interrelationships of the studied constructs.El presente estudio tuvo como objetivo investigar el papel mediador de la empatía, teniendo en cuenta el narcisismo como variable predictora en dos modelos diferentes, con la prosociabilidad como variable dependiente en el primero y las dimensiones de agresión en el segundo. Para ello, se contó una muestra de 205 encuestados de la ciudad de João Pessoa (M = 27.43; SD = 9.13). Se utilizó la Escala de Narcisismo de Ítem Único, la Escala de Reactividad Interpersonal Multidimensional, la Escala de Prosociabilidad, el Cuestionario de Agresión y un cuestionario sociodemográfico. Los datos fueron procesados con la ayuda de IBM SPSS y AMOS, a través de análisis descriptivos e inferenciales (correlaciones y mediación). Los resultados apuntaron a efectos negativos directos del narcisismo sobre la empatía y el comportamiento prosocial, y a efectos directos positivos sobre la agresión. Además, se verificó el papel mediador de la empatía en la relación entre narcisismo y prosociabilidad, lo que no se encontró en la relación entre narcisismo y agresión. Estos hallazgos corroboran estudios previos, además de contribuir a la comprensión de las interrelaciones de los constructos estudiados.O presente estudo objetivou investigar o papel mediador da empatia, tomando em conta o narcisismo como variável preditora em dois diferentes modelos, tendo a pró-sociabilidade como variável dependente no primeiro e as dimensões de agressão no segundo. Para isso, contou-se com uma amostra de 205 participantes da cidade de João Pessoa (M = 27.43; DP = 9.13). Utilizou-se a Single-Item Narcissism Scale, a Escala Multidimensional de Reatividade Interpessoal, a Escala de Pró-sociabilidade, o Questionário de Agressão e um questionário sociodemográfico. Os dados foram processados com o auxílio do IBM SPSS e AMOS através das análises descritivas e inferenciais (correlações e mediação). Os resultados apontaram para efeitos diretos negativos do narcisismo na empatia e no comportamento pró-social; e efeitos diretos positivos na agressão. Além disso, verificou-se o papel mediador da empatia na relação entre o narcisismo e a pró-sociabilidade, não encontrado na relação narcisismo e agressão. Esses achados corroboram estudos prévios, bem como contribuem para o entendimento das inter-relações dos construtos estudados
Influência dos tipos de tela de sombreamento (TNTs) no desenvolvimento da alface nas condições climática de Garanhuns/PE / Influence of types of shading screen (TNTs) on the development of lettuce in the climate conditions of Garanhuns/PE
A dificuldade principal da produção de alface nas regiões do semi-árido nordestino são as altas preços e a luminosidade, que afetam de modo significativo o crescimento da cultura. Nesse sentido, o presente experimento teve como objetivo avaliar a influência dos tipos de tela de sombreamento (TNTs) no crescimento da alface. O experimento foi conduzido na área experimental da UFRPE / UAG, no Município de Garanhuns / PE. O delineamento experimental inteiramente casualizado com cinco tratamentos, representados pelos tipos de tela de sombreamento (TNTs): T 1 - sem cobertura; T 2 - branco TNT; T 3 - TNT azul; T 4 - TNT vermelho e T 5- TNT amarelo e quatro repetições. Uma cultivar para Saladeira (Roxa) a céu aberto, com espaçamento de 0,20 x 0,20 m. As características avaliadas aos 15, 30 e 45 dias após o transplante influxo das modificações do ambiente com diferentes núcleos de telas foram: número de folhas (NF), altura da parte aérea da planta (ALP), diâmetro da copa (DC) , matéria fresca total (MFT) e matéria seca total (MST), bem como foram mensuradas como clorofilas A e B, clorofila total (clorofila A + B) e a relação clorofila A / B. Os maiores valores da produção da cultivar alface Salad Bowl (Roxa) foram registrados sob tela de sombreamento em comparação sem cobertura. A utilização de tela de núcleos amarela e vermelha associada com uma cultivar Saladeira foi a que proporcionou melhor resultado, constitui-se em um meio de incrementar a rentabilidade do produtor nas condições do Agreste Pernambucano. Em relação aos teores da clorofila A, B e total (A + B) o controle (sem cobertura) apresenta os maiores acúmulos nas folhas da alface
Análise multitemporal da área desflorestada no município de Paragominas / Multitemporal analysis of the deforested area in the municipality of Paragominas
O desflorestamento é um problema enfrentado na Amazônia legal, devido as atividades como pecuária, a agricultura de larga escala e a agricultura de corte e queima serem desenvolvidas de forma predatória e desenfreada, o estudo tem como objetivo analisar multitemporalmente as taxas das áreas desflorestadas no município de Paragominas e identificar as políticas públicas existentes para o controle. O método utilizado neste estudo foi o dedutivo, em relação a abordagem da pesquisa caracteriza-se como quantiqualitativa, a técnica utilizada para obtenção de dados foi revisão bibliográfica, com o recorte temporal 2008 a 2018 e consulta no site Instituto Nacional de pesquisas. Quanto aos resultados obtidos os anos que apresentaram maior taxa de desflorestamento foram os anos de 2004 e 2005 e a partir do ano de 2006 em diante as taxas apresentaram uma diminuição, dessa forma verificou-se que as políticas públicas foram primordiais para a diminuição na taxa de retirada da cobertura vegetal
Avanços da cirurgia robotica no tratamento do Câncer
A cirurgia robótica tem sido almejada por profissionais cirurgiões, visto que, é um procedimento considerado de alta eficácia, assim como, apresenta reduzidos níveis de riscos ao paciente, o que configura significativamente a qualidade elevada do procedimento médico. Logo, tem sido utilizada no tratamento cirúrgico de diversos tipos de câncer, o qual tem demonstrado melhores resultados quando comparados com procedimentos mais invasivas ou tradicionais O principal objetivo do é discutir por meio de uma revisão sistematizada da literatura acerca dos avanços da cirurgia robótica no tratamento dos demais tipos de cânceres. O presente estudo trata-se de uma revisão sistemática da literatura, de modo que, realizou-se buscas de na Scielo, Periódico Capes e na Biblioteca Virtual em Saúde (BVS), através de termos específicos do Decs, o qual resultou-se em: “Neoplasias” AND “Procedimentos Cirúrgicos Robóticos” AND “Terapêutica”. Foram elegíveis um total de 8 estudos na presente revisão sistemática. Este procedimento é devidamente realizado com menores danos de incisão possível no paciente, de modo que, possibilitou a diminuição de dores pós-operatórios, além da redução de sangramentos, traumas, respostas inflamatórias, tempo de internação e até mesmo melhores resultados estéticos nos pacientes, quando comparados com os métodos mais tradicionais e invasivos
Multidifferential study of identified charged hadron distributions in -tagged jets in proton-proton collisions at 13 TeV
Jet fragmentation functions are measured for the first time in proton-proton
collisions for charged pions, kaons, and protons within jets recoiling against
a boson. The charged-hadron distributions are studied longitudinally and
transversely to the jet direction for jets with transverse momentum 20 GeV and in the pseudorapidity range . The
data sample was collected with the LHCb experiment at a center-of-mass energy
of 13 TeV, corresponding to an integrated luminosity of 1.64 fb. Triple
differential distributions as a function of the hadron longitudinal momentum
fraction, hadron transverse momentum, and jet transverse momentum are also
measured for the first time. This helps constrain transverse-momentum-dependent
fragmentation functions. Differences in the shapes and magnitudes of the
measured distributions for the different hadron species provide insights into
the hadronization process for jets predominantly initiated by light quarks.Comment: All figures and tables, along with machine-readable versions and any
supplementary material and additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-013.html (LHCb
public pages
Study of the decay
The decay is studied
in proton-proton collisions at a center-of-mass energy of TeV
using data corresponding to an integrated luminosity of 5
collected by the LHCb experiment. In the system, the
state observed at the BaBar and Belle experiments is
resolved into two narrower states, and ,
whose masses and widths are measured to be where the first uncertainties are statistical and the second
systematic. The results are consistent with a previous LHCb measurement using a
prompt sample. Evidence of a new
state is found with a local significance of , whose mass and width
are measured to be and , respectively. In addition, evidence of a new decay mode
is found with a significance of
. The relative branching fraction of with respect to the
decay is measured to be , where the first
uncertainty is statistical, the second systematic and the third originates from
the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb
public pages
Measurement of the ratios of branching fractions and
The ratios of branching fractions
and are measured, assuming isospin symmetry, using a
sample of proton-proton collision data corresponding to 3.0 fb of
integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The
tau lepton is identified in the decay mode
. The measured values are
and
, where the first uncertainty is
statistical and the second is systematic. The correlation between these
measurements is . Results are consistent with the current average
of these quantities and are at a combined 1.9 standard deviations from the
predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb
public pages
Mortality and pulmonary complications in patients undergoing surgery with perioperative SARS-CoV-2 infection: an international cohort study
Background: The impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on postoperative recovery needs to be understood to inform clinical decision making during and after the COVID-19 pandemic. This study reports 30-day mortality and pulmonary complication rates in patients with perioperative SARS-CoV-2 infection. Methods: This international, multicentre, cohort study at 235 hospitals in 24 countries included all patients undergoing surgery who had SARS-CoV-2 infection confirmed within 7 days before or 30 days after surgery. The primary outcome measure was 30-day postoperative mortality and was assessed in all enrolled patients. The main secondary outcome measure was pulmonary complications, defined as pneumonia, acute respiratory distress syndrome, or unexpected postoperative ventilation. Findings: This analysis includes 1128 patients who had surgery between Jan 1 and March 31, 2020, of whom 835 (74·0%) had emergency surgery and 280 (24·8%) had elective surgery. SARS-CoV-2 infection was confirmed preoperatively in 294 (26·1%) patients. 30-day mortality was 23·8% (268 of 1128). Pulmonary complications occurred in 577 (51·2%) of 1128 patients; 30-day mortality in these patients was 38·0% (219 of 577), accounting for 81·7% (219 of 268) of all deaths. In adjusted analyses, 30-day mortality was associated with male sex (odds ratio 1·75 [95% CI 1·28–2·40], p\textless0·0001), age 70 years or older versus younger than 70 years (2·30 [1·65–3·22], p\textless0·0001), American Society of Anesthesiologists grades 3–5 versus grades 1–2 (2·35 [1·57–3·53], p\textless0·0001), malignant versus benign or obstetric diagnosis (1·55 [1·01–2·39], p=0·046), emergency versus elective surgery (1·67 [1·06–2·63], p=0·026), and major versus minor surgery (1·52 [1·01–2·31], p=0·047). Interpretation: Postoperative pulmonary complications occur in half of patients with perioperative SARS-CoV-2 infection and are associated with high mortality. Thresholds for surgery during the COVID-19 pandemic should be higher than during normal practice, particularly in men aged 70 years and older. Consideration should be given for postponing non-urgent procedures and promoting non-operative treatment to delay or avoid the need for surgery. Funding: National Institute for Health Research (NIHR), Association of Coloproctology of Great Britain and Ireland, Bowel and Cancer Research, Bowel Disease Research Foundation, Association of Upper Gastrointestinal Surgeons, British Association of Surgical Oncology, British Gynaecological Cancer Society, European Society of Coloproctology, NIHR Academy, Sarcoma UK, Vascular Society for Great Britain and Ireland, and Yorkshire Cancer Research
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