Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective : São Francisco Craton and marginal orogens (Brazil)

The Sao Francisco Craton (SFC) and its marginal Aracuai and Brasilia orogens exhibit a significant diversity in their lithospheric architecture. These orogens were shaped during the Neoproterozoic-Cambrian amalgamation of West Gondwana. The rigid cratonic lithosphere of the SFC and the relatively weak lithosphere of the Aracuai Orogen were disrupted during the Cretaceous opening of the South Atlantic Ocean, whereas the Brasilia Orogen remained in the continental hinterland. In earlier research, the thermal effects of the Phanerozoic reactivations in the shallow crust of the Aracuai Orogen have been revealed by low-temperature thermochronology, mainly by apatite fission track (AFT) analysis. However, analyses from the continental interior are scarce. Here we present new AFT data from forty-three samples from the Brasilia Orogen, the SFC and the Aracuai Orogen, far from the passive margin of the Atlantic coast (similar to 150 to 800 km). Three main periods of basement exhumation were identified: (i) Paleozoic, recorded both by samples from the SFC and Brasilia Orogen; (ii) Early Cretaceous to Cenomanian, recorded by samples from the Aracuai Orogen; and (iii) Late Cretaceous to Paleocene, inferred in samples from all domains. We compare the differential exhumation pattern of the different geotectonic provinces with their lithospheric strengths. We suggest that the SFC likely concentrated the Meso- Cenozoic reactivations in narrow weak zones while the Aracuai Orogen displayed a far-reachingMeso-Cenozoic deformation. The Brasilia Orogen seems to be an example of a stronger orogenic lithosphere, inhibiting reworking, confirmed by our new AFT data. Understanding the role of the lithosphere rigidity may be decisive to comprehend the processes of differential denudation and the tectonic-morphological evolution over Phanerozoic events. (C) 2021 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved

Relato de experiência: projeto de extensão “Antropofagia zoológica brasileira em memes – Viva Macunaíma!”

A pandemia de COVID-19 mudou o mundo, enfatizando a importância da comunicação via redes sociais e realçando a força dos memes para disseminar informações na internet. "Macunaíma" é uma obra que atravessa tempo e espaço, escorregando entre o culto e o popular. Bebendo da água renovadora da Semana de Arte Moderna de 1922, o livro faz uma síntese - caricata e séria - do povo brasileiro e também de nossos bichos. Pretendeu-se divulgar isso com o projeto “Antropofagia zoológica brasileira em memes – Viva Macunaíma!”, em que obras de consagrados artistas modernistas foram base para estudos acerca dos animais nelas incluídos. O material resultante da ação do projeto foi publicado no Instagram @homem_leoa, com a finalidade de mostrar que ciência e cultura podem caminhar juntas em prol da divulgação artística e científica

Risco teratogênico: a percepção em diferentes segmentos da população

The wrong perception of the true teratogenic risk of the drugs used in pregnancy may lead the mistaken management of pregnancy: the unnecessary termination of the wanted pregnancy or damages fetuses forever. The knowledge about the teratogenic risk is very important for the general population, and mainly for the health professionals. The perception of the teratogenic risk of fifteen common medications and two illicit drugs by physicians, medical students and lay women was assessed employing a visualanalogue scale with the percentual risk of a child born with congenital anomaly caused by drugs used during pregnancy. The average of the teratogenic risk for the assessed drugs was higher than the true risk in all groups. The most common risk of malformation in the general population was recognised by gynaecologists and obstericians. The best improvement was with the more common drugs used in pregancy (paracetamol and amoxycillin) and recognised by gynaecologists and obstetricians.A percepção errônea do real risco teratogênico das drogas às quais as gestantes são expostas pode induzir a erros graves de conduta perante uma gravidez, ou pela interrupção desnecessária da gestação desejada, ou devido às seqüelas permanentes nas crianças. O conhecimento sobre o risco teratogênico é de fundamental importância para a população geral e, principalmente, para a comunidade médica. A percepção do risco teratogênico de quinze fármacos habituais e duas drogas ilícitas foi avaliada entre médicos, estudantes de medicina e mulheres leigas, utilizando-se uma escala visual, na qual os entrevistados assinalaram o risco em percentual de uma criança nascer com anomalia congênita secundária à exposição intra-útero às drogas estudadas. A média da percepção do risco teratogênico para as drogas avaliadas foi maior do que o risco real entre todos os grupos estudados. O risco real de anomalia congênita na população geral foi melhor reconhecido entre os médicos ginecologistas e obstetras. O melhor índice de acerto foi para drogas mais rotineiramente utilizadas durante a gestação (paracetamol e amoxacilina), de acordo com os obstetras

Caracterização da madeira da metade superior do tronco de árvores de Eucalyptus grandis x Eucalyptus urophylla de 13 anos para produção de celulose

Made available in DSpace on 2016-08-29T15:37:06Z (GMT). No. of bitstreams: 1 tese_7380_ANACAROLINABOA_DISSERTACAO_2014.pdf: 1843739 bytes, checksum: 1c4080dbbf486cde3eda92b569c6bd80 (MD5) Previous issue date: 2014-02-24A madeira de eucalipto representa uma importante fonte de matéria-prima para o setor florestal, e diversos estudos vêm sendo realizados com o objetivo de agregar-lhe maior qualidade. O objetivo geral desta pesquisa foi avaliar se a madeira da parte superior do tronco de árvores com 13 anos do híbrido Eucalyptus grandis x Eucalyptus urophylla atendia as condições de qualidade exigidas para a produção de polpa celulósica. Foram avaliadas as propriedades da madeira de quatro árvores de cada um dos nove clones estudados. Dois dos clones foram procedentes de plantios comerciais com cinco anos, localizados em Aracruz no estado do Espírito Santo, destinados a produção exclusiva de celulose. Os sete demais clones foram originados de um plantio com 13 anos, localizado em Alcobaça no estado da Bahia, destinados à produção conjunta de madeira serrada e celulose. Os resultados das caracterizações anatômica, química e densidades básica e aparente da madeira foram comparados, e por meio dos resultados verificou-se diferença entre a madeira das árvores com cinco anos e a da parte superior do tronco das árvores com 13 anos. O uso de técnicas de análise multivariada permitiu identificar que entre os clones de mesma idade não existe variabilidade das propriedades da madeira que os distribuam em grupos distintos, sendo possível inferir que existem divergências entre a madeira de árvores de diferentes idades, mas não de mesma idade. Quandoavaliadas às propriedades da madeira das árvores de cinco anos e da parte superior do tronco das árvores de 13 anos, observou-se que a parte superior do tronco proporcionou maior disponibilidade de matéria-prima, em função do maior volume de madeira e da densidade básica, além de fibras com paredes mais espessas e menores teores de lignina.The eucalypt wood is an important source of raw material for the forest industry, and several studies have been conducted with the objective of adding more quality to this material. The general objective of this research was to evaluate if the wood of the upper trunk of trees 13 years old of hybrid Eucalyptus grandis x Eucalyptus urophylla has the quality required for pulpwood production. Was evaluated the wood properties of four trees of each of the nine clones studied. Two of the clones were from commercial plantations with five years old, located in the town of Aracruz in Espirito Santo State, exclusive to cellulose production. The seven other clones were from plantations 13 years old, located in the town of Alcobaça in Bahia State, for the joint production of lumber and pulp. The results of anatomical, chemical and basic and apparent wood density characterizations were compared, and by the results we found differences between the wood of five years old trees and the upper trunk of 13 years old. The use of statistical multivariate analysis techniques identified that among the clones of the same age there was no variability in the wood properties that distributed them into different groups. Thus, it was possible to infer that there were differences between wood from trees of different ages, but not of the same age. When were evaluated the wood properties of trees with five years old and the upper trunk of 13 years old, it was observed that the upper trunk showed more availability of raw material, due to the higher volume of wood and basic density, addition of fibers with thicker walls and smaller content of lignin

PROPERTIES OF CHARCOAL PRODUCED FROM REACTION WOOD IN TREES INCLINED DUE TO WIND1

<div><p>ABSTRACT Inclined trees produce reaction wood, whose properties are distinct from normal wood. This situation can affect the production of charcoal. This study was conducted to evaluate the quality of charcoal derived from reaction wood in trees of a commercial plantation inclined due to the action of wind. We used six year old wood from a Eucalyptus grandis xEucalyptus urophylla hybrid from plantations located in Minas Gerais. The physical and chemical properties of the wood were determined as well as the gravimetric yield and charcoal properties. According to the results, there were significant differences between the properties of the reaction and normal wood, with the reaction wood having lower levels of lignin and extractives, greater holocellulose content and low specific gravity. However, these characteristics of reaction wood did not significantly affect the properties of its charcoal.</p></div

Sociodemographic and clinical profile of index cases and family members with HTLV-1.

Sociodemographic and clinical profile of index cases and family members with HTLV-1.</p

Composition of families of HTLV-1-infected patients (index cases).

Composition of families of HTLV-1-infected patients (index cases).</p

Study design flowchart.

IntroductionFamilial clustering of HTLV-1 and related diseases has been reported in Brazil. However, intrafamilial transmission of HTLV-1 based on molecular analysis has been studied only in a few communities of Japanese immigrants and African-Brazilians.ObjectiveTo investigate the familial clustering of HTLV-1 infection and to determine the likely routes of transmission through epidemiological and genetic analyzes.MethodsMedical records of 1,759 HTLV-1+ patients from de the Center for HTLV in Salvador, Brazil, were evaluated to identify first-degree relatives previously tested for HTLV-1. Familial clustering was assumed if more than one member of the same family was HTLV-1+. LTR regions of HTLV-1 sequences were analyzed for the presence of intrafamilial polymorphisms. Family pedigrees were constructed and analyzed to infer the likely transmission routes of HTLV-1.ResultsIn 154 patients at least one other family member had tested positive for HTLV-1 (a total of 182 first-degree relatives). Of the 91 couples (182 individuals), 51.6% were breastfed, and 67.4% reported never using a condom. Of the 42 mother-child pairs, 23.8% had a child aged 13 years or younger; all mothers reported breastfeeding their babies. Pedigrees of families with 4 or more members suggests that vertical transmission is a likely mode of transmission in three families. Three families may have had both vertical and sexual transmission routes for HTLV-1. The genetic signatures of the LTR region of 8 families revealed 3 families with evidence of vertical transmission, another 3 families (spouses) with sexual transmission, and one family with both transmission routes. HTLV-1 sequences belonged to Cosmopolitan subtype HTLV-1a Transcontinental subgroup A.ConclusionSexual and vertical transmission routes contribute to the intrafamilial spread of HTLV-1 in the state of Bahia.</div

Pedigrees of 8 families with likely routes of HTLV-1 transmission based on epidemiological data, sexual behavior and genetic sequencing of the HTLV-1 LTR region.

Family members highlighted in red represent, partners, children, or grandchildren of the index case who provided secondary information about sexual behavior and other risk factors.</p