567 research outputs found

    Probing exotic phenomena at the interface of nuclear and particle physics with the electric dipole moments of diamagnetic atoms: A unique window to hadronic and semi-leptonic CP violation

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    The current status of electric dipole moments of diamagnetic atoms which involves the synergy between atomic experiments and three different theoretical areas -- particle, nuclear and atomic is reviewed. Various models of particle physics that predict CP violation, which is necessary for the existence of such electric dipole moments, are presented. These include the standard model of particle physics and various extensions of it. Effective hadron level combined charge conjugation (C) and parity (P) symmetry violating interactions are derived taking into consideration different ways in which a nucleon interacts with other nucleons as well as with electrons. Nuclear structure calculations of the CP-odd nuclear Schiff moment are discussed using the shell model and other theoretical approaches. Results of the calculations of atomic electric dipole moments due to the interaction of the nuclear Schiff moment with the electrons and the P and time-reversal (T) symmetry violating tensor-pseudotensor electron-nucleus are elucidated using different relativistic many-body theories. The principles of the measurement of the electric dipole moments of diamagnetic atoms are outlined. Upper limits for the nuclear Schiff moment and tensor-pseudotensor coupling constant are obtained combining the results of atomic experiments and relativistic many-body theories. The coefficients for the different sources of CP violation have been estimated at the elementary particle level for all the diamagnetic atoms of current experimental interest and their implications for physics beyond the standard model is discussed. Possible improvements of the current results of the measurements as well as quantum chromodynamics, nuclear and atomic calculations are suggested.Comment: 46 pages, 19 tables and 16 figures. A review article accepted for EPJ

    MANEJO FLORESTAL EM LlNHARES - CRESCIMENTO EM FUNÇÃO DE DIFERENTES NÍVEIS DE INTERVENÇÃO

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    Com o objetivo de conhecer o efeito de diferentes intensidades de exploração em uma área de floresta de tabuleiro da Mata Atlântica, foi instalado um ensaio de manejo florestal sustentado na Reserva Florestal de Unhares, pertencente à Companhia Vale do Rio Doce - CVRD, localizada no município de Unhares (ES). O delineamento estatístico do ensaio foi o de blocos ao acaso, com cinco repetições e nove tratamentos. O ensaio foi instalado em 1980 e as avaliações foram efetuadas através dos dados coletados nos inventários inicial (1980), pós-exploratório (1980) e contínuos (1983, 1987 e 1990)

    PERFIL NUTRICIONAL DE HIPERTENSOS EM ACOMPANHAMENTO EM UNIDADES BÁSICAS DE SAÚDE DO MUNICÍPIO DE SÃO LUÍS – MA

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    A Hipertensão Arterial (HA) é considerada um problema de saúde pública, muitas vezes assintomática e de difícil controle, que pode levar a seqüelas irreversíveis.  O objetivo deste estudo foi avaliar o estado nutricional e o consumo alimentar de pacientes hipertensos. Realizou-se um estudo transversal, com pacientes hipertensos cadastrados no programa HiperDia (MS), em acompanhamento em duas Unidades Básicas de Saúde, em São Luis – MA, no período de fevereiro de 2010 a janeiro de 2011. Foram analisados dados socioeconômicos, demográfcos, estilo de vida, antropométricos e dietéticos. Para avaliar o estado nutricional foram utilizados o Índice de Massa Corpórea (IMC) e a Circunferência da Cintura (CC), segundo as recomendações propostas pela Organização Mundial de Saúde (OMS). Para avaliar o consumo energético e de nutrientes foi utilizado o método do registro alimentar de três dias, transformados posteriormente em recordatório alimentar de 24 horas (R24h). Foram avaliados 184 pacientes, com média de idade de 60,8 ± 12,9 anos, sendo a maioria do sexo feminino (76,6%), de cor não branca (85,9%), com menos de oito anos de escolaridade (75%) e com renda familiar inferior a quatro salários mínimos (53,3%). Quanto ao estilo de vida, 94,6% não fumavam, 80,4% não ingeriam bebida alcoólica e 77,6% eram sedentários. Houve prevalência de excesso de peso entre a amostra estudada (69,0%). A proporção de pacientes com obesidade abdominal foi de 54,3%, com maior frequência entre as mulheres (64,5%). Os percentuais de macronutrientes encontraram-se adequados, entretanto, o consumo energético e de fbra encontraram-se abaixo do recomendado, segundo as DRI’s (2002). Assim, houve predomínio de excesso de peso e de obesidade abdominal e o consumo energético foi inadequado para ambos os sexos.Descritores: Hipertensão Arterial; Estado Nutricional; Consumo Alimentar; Macronutrientes. Abstract:   Arterial Hypertension (AH) is considered a problem of public health, often asymptomatic and diffcult to control, which can lead to irreversible sequels. The objective of this study was to evaluate the nutritional status and dietary intake of hypertensive patients. We conducted a cross-sectional study with hypertensive patients enrolled in the program HiperDia (MS), followed in two Basic Health Units in São Luis - MA, from February 2010 to January 2011. We analyzed the data on socioeconomic, demographic, lifestyle, anthropometric and dietary factors. To evaluate the nutritional status, it was used the body mass index (BMI) and also the waist circumference (WC), according to the recommendations proposed by the World Health Organization (WHO). The energy and nutrients evaluation was evaluated by using the method of three-day food record, subsequently processed into 24-hour dietary recall (24HR). We appraised 184 patients with a mean age of 60.8 ± 12.9 years, mostly female (76.6%), non-Caucasian (85.9%), with less than eight years of schooling (75%) and household income less than four minimum salaries (53.3%). About the  lifestyle, 94.6% did not smoke, 80.4% did not drink alcohol and 77.6% were sedentary. There was a prevalence of overweight among the study sample (69.0%), no statistically signifcant difference between sexes. Regarding the distribution of body fat, the proportion of patients with abdominal obesity was 54.3%, according to waist circumference, more frequently among women (64.5%). The percentages of macronutrients found to be adequate, but, energy consumption and fber were under the recommended ones, according to DRI’s (2002). Thus, there was a predominance of overweight and abdominal obesity and caloric intake was inadequate for both sexes.Descriptors: Hypertension; Nutritional Status; Food Consumption; Macronutrients

    Search for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at root s=13 TeV

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    Search for high-mass diphoton resonances in proton-proton collisions at 13 TeV and combination with 8 TeV search

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    Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks

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    Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV

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    Search for leptophobic Z ' bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV

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    Retardadores de crescimento no desenvolvimento e na qualidade ornamental de Zinnia elegans Jacq. 'Lilliput' envasada

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    As zínias têm grande potencial como plantas floríferas envasadas e representam rápida fonte de novidade para a floricultura com o auxílio de retardadores de crescimento. Avaliaram-se os efeitos de retardadores de crescimento no desenvolvimento e na produção de plantas envasadas de porte baixo, compactas e atrativas de 'Lilliput' Zinnia elegans, cultivar altamente ornamental, com sementes de baixo custo. O delineamento experimental foi em blocos casualizados, com dez tratamentos (controle e três concentrações de cada retardador: daminozide, paclobutrazol e chlormequat) e quatro repetições (dois vasos por unidade experimental, com uma planta por vaso de 0,6 L). Paclobutrazol (0,5; 0,75 e 1,0 mg i.a. por vaso) e chlormequat (1,0; 2,0 e 3,0 g L-1) foram aplicados ao substrato (40 mL por vaso), enquanto o daminozide (2,5; 3,75 e 5,0 g L-1) foi aplicado através de pulverização foliar (10 mL por vaso), no estádio de gema floral apical visível. Daminozide (2,5 e 3,75 g L-1), paclobutrazol (0,5; 0,75 e 1,0 mg i.a. por vaso) e 1,0 g L-1 de chlormequat reduziram significativamente a altura das plantas e o comprimento dos ramos laterais, sem afetar o diâmetro dos capítulos, atrasar o ciclo de produção e causar fitotoxicidade. Entretanto, as plantas não se apresentaram suficientemente baixas e compactas para atender às exigências de qualidade do mercado. Chlormequat (2,0 e 3,0 g L-1) causou fitotoxicidade e daminozide (5,0 g L-1) aumentou o ciclo de produção.Zinnias have good potential to be used as flowering, potted plants, being a quick source of novelty for the floriculture industry with the aid of growth retardants. This study evaluated the effect of growth retardants on development and production of short, compact and attractive plants of potted 'Lilliput' Zinnia elegans, a highly ornamental zinnia with low cost seeds. Trials were set up in randomized blocks, with ten treatments (control and three treatments of each retardant: daminozide, paclobutrazol and chlormequat) and four replications (two pots per experimental unit, with one plant per 0.6-L pot). Paclobutrazol (0.5, 0.75 and 1.0 mg a.i. per pot) and chlormequat (1.0, 2.0 and 3.0 g L-1) were applied as a single drench (40 mL per pot), and daminozide (2.5, 3.75 and 5.0 g L-1) as a single foliar spray to runoff (10 mL per pot), at apical flower bud stage. Daminozide (2.5 and 3.75 g L-1), paclobutrazol (0.5, 0.75 and 1.0 mg a.i. per pot) and chlormequat at 1.0 g L-1 significantly reduced plant height and side branches length, without affecting flower diameter, delaying production cycle and causing phytotoxicity symptoms. However, plants were not short and compact enough to meet market quality demand. Chlormequat (2.0 and 3.0 g L-1) caused phytotoxicity symptoms and daminozide (5.0 g L-1) delayed production cycle
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