bluuebunny/crossref_metadata_2025 huggingface dataset:
DNA methylation is not a driver of gene expression reprogramming in young honey bee workers
Authors: Cardoso‐Júnior Carlos A. M. , Yagound Boris , Ronai Isobel , Remnant Emily J. , Hartfelder Klaus , Oldroyd Benjamin P.
Published: July 2021

The presence of DNA methylation marks within genic intervals, also called gene body methylation, is an evolutionarily‐conserved epigenetic hallmark of animal and plant methylomes. In social insects, gene body methylation is thought to contribute to behavioural plasticity, for example between foragers and nurse workers, by modulating gene expression. However, recent studies have suggested that the majority of DNA methylation is sequence‐specific, and therefore cannot act as a flexible mediator between environmental cues and gene expression. To address this paradox, we examined whole‐genome methylation patterns in the brains and ovaries of young honey bee workers that had been subjected to divergent social contexts: the presence or absence of the queen. Although these social contexts are known to bring about extreme changes in behavioral and reproductive traits through differential gene expression, we found no significant differences between the methylomes of workers from queenright and queenless colonies. In contrast, thousands of regions were differentially methylated between colonies, and these differences were not associated with differential gene expression in the subset of genes examined. Methylation patterns were highly similar between brain and ovary tissues and only differed in nine regions. These results strongly indicate that DNA methylation is not a driver of differential gene expression between tissues or behavioral morphs. Finally, despite the lack of difference in methylation patterns, queen presence affected the expression of all four DNA methyltransferase genes, suggesting that these enzymes have roles beyond DNA methylation. Therefore, the functional role of DNA methylation in social insect genomes remains an open question.
Risk factors for poor outcome in older patients admitted in a surgical intensive care unit
Authors: Occhiali Emilie , Prolange Pierre , Cassiau Florence , Roca Frédéric , Veber Benoit , Clavier Thomas
Published: July 2021

Background

The benefit of a stay in an intensive care unit (ICU) is not certain for older patients, particularly in the surgical context.

Aims

The objective of this study was to identify the factors associated with an unfavourable outcome in this population.

Design

Prospective, descriptive, monocentric study conducted in the surgical ICU of a French university hospital.

Methods

Patients aged ≥75 years admitted in the surgical ICU for a predicted length of stay ≥48 hours were included. Patients received an initial and a 6‐months nutritional and functional assessment performed by physicians and nurses. The outcome was considered as favourable if the KatzActivities of Daily Living(ADL) variation (ADL delta = 6‐months ADL – ICU admission ADL) was between 0 and −0.5 point 6 months after ICU discharge and unfavourable if the ADL delta decreased by more than 0.5 points or if the patient had died 6 months after ICU discharge.

Results

Fifty‐six patients—32 (57%) male—aged 79 [77; 83] y were included. ICU mortality was 19%; 6‐month mortality was 22%. Median ADL delta was −0.5 [−0.5–0] points. A low ADL score (P = .0438) and a low albumin level (P = .0213) at admission were the two independent factors associated with an unfavourable outcome.

Conclusion

Mortality and loss of independence were high in this elderly population during and after their surgical ICU stay. The benefit of a systematic collaboration between intensive care specialists, ICU nurses, and geriatricians, to assess and manage nutritional and functional problems and to prevent a pejorative outcome in patients over 75 years old admitted in surgical ICU needs to be studied.

Relevance to clinical practice

There should be systematic screening for objective markers of undernutrition and frailty on ICU admission of older patients as they are associated with a poor prognosis.
Effects of obesity on pulmonary function considering the transition from obstructive to restrictive pattern from childhood to young adulthood
Authors: Huang Li , Wang Sen‐Te , Kuo Han‐Pin , Delclaux Christophe , Jensen Megan E. , Wood Lisa G. , Costa Dirceu , Nowakowski Dariusz , Wronka Iwona , Oliveira Paula D. , Chen Yi‐Chun , Chen Yang‐Ching , Lee Yungling L.
Published: July 2021

Adults with obesity exhibit a restrictive pattern, whereas children with obesity exhibit an obstructive pattern. However, the transition process remains unclear. We performed a systematic search for studies reporting on body mass index and pulmonary function in children. The main outcomes were forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and their ratio (FEV1/FVC). We compared individuals with overweight or with obesity with individuals with normal weight. Random‐effects models were used to calculate pooled estimates. A total of 17 studies were included. Individuals with obesity had a lower FEV1/FVC ratio (mean difference [MD] = −3.61%; 95% confidence interval [CI] = −4.58%, −2.64%) and a higher percent‐predicted FVC (MD = 3.33%; 95% CI = 0.79%, 5.88%) than those with normal weight. Obesity impaired pulmonary function in the obstructive pattern during childhood to young adulthood, and the maximum obstruction was observed at the age of 16 years in boys and 20 years in girls. The effects attenuated at approximately 30 years and then shifted to the restrictive pattern after 35 years of age in men and 40 years in women. The effects of obesity on pulmonary function change from the obstructive pattern in childhood to the restrictive pattern in adulthood.
Method’s corner: Allergist’s guide to network meta‐analysis
Authors: Chu Derek K. , Brignardello‐Petersen Romina , Guyatt Gordon H. , Ricci Cristian , Genuneit Jon
Published: July 2021

Network meta‐analyses (NMAs) simultaneously estimate the effects of multiple possible treatment options for a given clinical presentation. For allergists to benefit optimally from NMAs, they must understand the process and be able to interpret the results. Through a worked example published in Pediatric Allergy and Immunology, we summarize how to identify credible NMAs and interpret them with a focus on recent innovations in the GRADE approach (Grading of Recommendations Assessment, Development, and Evaluation). NMAs build on traditional systematic reviews and meta‐analyses that consider only direct paired comparisons by including indirect evidence, thus allowing the simultaneous assessment of the relative effect of all pairs of competing alternatives. Our framework informs clinicians of how to identify credible NMAs and address the certainty of the evidence. Trustworthy NMAs fill a critical gap in providing key inferences using direct and indirect evidence to inform clinical decision making when faced with more than two competing courses of treatment options. This document will help allergists to identify trustworthy NMAs to enhance patient care.
Reproducibility of eucapnic voluntary hyperpnoea for exercise‐induced bronchoconstriction diagnosis in asthmatic children and adolescents
Authors: Rizzo Jose Ângelo , Rodrigues Filho Edil de Albuquerque , Gonçalves Adriana Velozo , Albuquerque Laienne Carla Barbosa De Barros , Albuquerque Eduardo Martins de , Albuquerque Cláudio Gonçalves de , Almeida Anderson Henrique Souza de , Peixoto Decio Medeiros , Correia Junior Marco Aurelio de Valois
Published: July 2021

Background

Respiratory symptoms after exercise are frequently reported by asthmatic patients, and exercise‐induced bronchoconstriction (EIB) is a frequent cause, which requires objective testing for diagnosis. Eucapnic voluntary hyperpnea (EVH) is recommended as a surrogate stimulus for this purpose. Its short‐term reproducibility is not yet established in children and young adolescents with asthma.

Objective

To evaluate the short‐term test‐retest agreement and reproducibility of FEV1 changes after EVH in this population.

Methods

Asthmatic patients aged between 10 and 20 years underwent EVH for EIB diagnosis on two occasions 2–4 days apart at a specialized university clinic. FEV1 was measured at 5, 15, and 30 min after EVH with a target ventilation rate 21 times the baseline FEV1. EIB was diagnosed as a decrease ≥10% in FEV1 from baseline.

Results

A total of 26 of 62 recruited individuals tested positive for EIB on both visits (positive group) and 17 on one visit only (divergent group), while 19 tested negative on both visits (negative group). The overall agreement was 72.5% (95%CI 61.6%, 83.6%), and Cohen's kappa coefficient was 0.452. Low bias (0.87%) and high intra‐class correlation coefficient (0.854, 95%CI 0.758,0.912; p < .001) for FEV1 response between test days were found, but with wide limits of agreement (±20.72%). There were no differences in pre‐challenge FEV1 or achieved ventilation rate between visits either between groups (p = .097 and p = .461) or within groups (p = .828 and p = .780). There were no safety issues.

Conclusions

More than one EVH test should be performed in children and young adolescents with asthma to exclude EIB and minimize misdiagnosis and mistreatment.
Evidence for Systemic Reactive Oxygen Species in UVB‐mediated Microvesicle Formation
Authors: McGlone Cameron L. , Christian Lea , Schmeusser Benjamin , Liu Langni , Chalfant Charles E. , Stephensen Daniel J. , Sherwin Catherine M. , Rapp Christine M. , Sattouf Zafer , Rohan Craig A. , Morris Connor , Chen Yanfang , Travers Jeffrey B.
Published: July 2021

Recent studies have implicated subcellular microvesicle particles (MVP) in the ability of ultraviolet B radiation to exert both local and systemic effects. Indeed, UVB generates MVP (UVB‐MVP) in human skin and systemically following phototherapy. The current studies were designed to test the hypothesis that the ability of UVB to generate MVP was dependent upon reactive oxygen species (ROS). To that end, we tested urine samples from subjects undergoing UVB phototherapy for the presence of isoprostanes as well as the oxidized guanosine derivative 8OHdG. We also conducted a clinical study in which volar forearms of subjects were treated with localized UVB and erythema/MVP measured. The same cohort was then treated with 7 days of vitamin C (2 g day−1) and vitamin E (1000 IU day−1), and UVB‐induced MVPs tested on the contralateral forearm. Urine specimens from subjects undergoing phototherapy were found to have increased levels of isoprostanes and 8OHdG, with maximal levels noted 8–16 h post‐treatment. Treatment with antioxidant vitamins resulted in diminished UVB‐generated skin MVP to baseline levels. These studies suggest that whole‐body UVB generates a systemic pro‐oxidative response, and that antioxidants can attenuate localized skin UVB‐MVPs.
Assessing sustainability through the Institutional Grammar of urban water systems
Authors: Deslatte Aaron , Helmke‐Long Laura , Anderies John M. , Garcia Margaret , Hornberger George M. , Ann Koebele Elizabeth
Published: July 2021

Urban water supply systems in the United States are designed to be robust to a wide range of historical hydrological conditions in both their physical infrastructure and in the institutional arrangements that govern their use. However, these systems vary greatly in their capacity to respond to new and evolving stressors on water supplies, such as those associated with climate change. Developing a more precise understanding of the complexity of interactions between the environmental and human components of urban water systems, specifically via their institutions, has the potential to help identify institutional design choices that can foster proactive transitions to more sustainable operating states. This article adapts the Institutional Grammar (IG) within the Robustness of Coupled Infrastructure Systems Framework to assess how a heavily engineered system's institutional configuration may impact its ability to transition to more sustainable management practices. While use of the IG has historically been limited in larger‐N studies, our application demonstrates its flexibility in revealing variation in specific components across cases. The analysis finds the structure of formal institutions shape the interactions between actors differently, and that institutional diversity exists across environmental contexts. The extent to which this institutional diversity drives transitions remains an open question. The results highlight both the importance of and challenges involved with developing longitudinal data on social and natural system interactions.
BeSiDe time to move behavior support in dentistry from an art to a science: A position paper from the BeSiDe (Behavior Support in Dentistry) Group
Authors: Mac Giolla Phadraig Caoimhin , Newton Tim , Daly Blánaid , Limeres Posse Jacobo , Hosey Marie Therese , Yarascavitch Carilynne , MacAuley Yvonne , Buchanan Heather , Nunn June , Freeman Ruth , Stirling Chris , Healy Olive , Asimakopoulou Koula
Published: July 2021

Aims

To share the need for agreement in terminology around how people are supported to receive dental care.

Method

In this position paper, we make the case for a shift in behavior support in dentistry from an art to a science.

Results

We outline why we need agreement on the definition of behavior support across dentistry, agreement on underlying theory, aims and values, and why we need agreement on terms for specific techniques.

Conclusions

We share how patients and dental teams can benefit through better science, education and practice of dental behaviour support.
Potassium content of the American food supply and implications for the management of hyperkalemia in dialysis: An analysis of the Branded Product Database
Authors: Picard Kelly , Picard Christopher , Mager Diana R. , Richard Caroline
Published: July 2021

Ultraprocessed foods can be a source of potassium additives. Excess potassium consumption can lead to hyperkalemia. How frequently potassium additives are found in the food supply and how they impact potassium content is not well documented. Using the Branded Product Database, ingredient lists were searched for “potassium” to identify products containing additives. For products listing potassium content, accuracy of potassium content reporting and how potassium content differed with additive use was also assessed. A total of 239,089 products were included, 35,102 (14.7%) contained potassium additives, and 13,685 (5.7%) provided potassium content. Potassium additives were most commonly found in dairy products, supplements, and mixed foods (at 37%, 34%, and 28%, respectively). Potassium additives in mixed foods and vegetables and fruits were associated with 71% and 28% more potassium per serving, respectively (p < 0.01). Potassium content increased by 1874 mg (66%) when a 1‐day sample menu compared foods with and without additives. Potassium content of foods with and without additives is not well documented. Potassium additives are prevalent and can be associated with increased potassium content. However, more information is needed to better understand how different additives used in different foods change potassium content.
Identificação de cianobactéricas em sedimentos da Lagoa Pitanguinha, estado do Rio de Janeiro, Brasil
Authors: Silva e Silva Loreine Hermida , Damazio Cynthia Moreira , Iespa Anderson Andrade Cavalcanti
Published: July 2021

The Pitanguinha lagoon is a hypersaline lagoon. It is located between the latitudes 22º55'42"-22º56'00"S and longitudes 42º20'45"- 42º21'30"W, in the Rio de Janeiro State. The air temperatura in average varies from 19º to 31º and presents an annual pluviometric rate of 900mm, with an evaporation of 1.400mm. The psammic cyanobacteria lives in surface sediment among sedimentary grains mainly quartz. The objective of this study was the identification of psammic cyanobacteria finding in the marginal portion the Pitanguinha Lagoon. Collections were done during 2003-2004, in the tide period the lagoon, where five collection stations was established. The taxonomic analisys was made with fresh and permanent slides, through optic microscope mensuration, that evalued its classic morphologic characteristics. The families Chroococcaceae Nägeli 1849 and Synechococcaceae Komárek & Anagnostidis 1995 were the most frequent with 35 % of the species. The others families presented the following percents: Phormidiaceae Anagnostidis & Komárek 1988 - 10%; Nostocaceae Bourrelly 1970 - 5%; Pseudanabaenaceae Anagnostidis & Komárek 1988 - 5%; Schizothricaceae Elenkin 1934 - 5% e Xenococcaceae Ercergovi - 5%.
Forams of the Gulf of Mexico: troubles in a sea of plenty
Authors: Gupta Barun K. Sen
Published: July 2021

Abstract
Micro*scope and the Star*sand database
Authors: Habura Andrea , Patterson David L. , Bowser Samuel S.
Published: July 2021

Abstract
Upper Bathonian foraminifera from the North-Lusitanian Sub-Basin, Portugal
Authors: Carapito-Krausshar Maria Cristina
Published: July 2021

Abstract
Neotectonic uplift of the Pacific Coast of Panama and Costa Rica, based on benthic foraminifera
Authors: Leon-Rodriguez Lizette , Collins Laurel S.
Published: July 2021

Abstract
The updated orthophragminid zonation and main turnovers based on the late Paleocene to Priabonian record from Turkey
Authors: Ã–zcan Ercan , Less Gy¶rgy
Published: July 2021

Abstract
Recent advances in the study of Eocene planktonic foraminifera
Authors: Pearson Paul N. , Olsson Richard K. , Huber Brian T. , Hemleben Christoph , Berggren William A. , Coxall Helen K. , Fucek Vlasta Premec , Silva Isabella Premoli , Wade Bridget S.
Published: July 2021

Abstract
Isotope records from Turborotalia cerroazulensis and Turborotalia pomeroli near the middle/late Eocene boundary (North Adriatic Sea, Croatia)
Authors: Premec-Fucek Vlasta , Pearson Paul N.
Published: July 2021

Abstract
Barremian-Turonian benthic foraminiferal assemblages from the Great Valley Sequence, California
Authors: Tomosugi T. , Nishi H. , Fernando A. G. S. , Moriya K. , Tanabe K. , Murphy M. A.
Published: July 2021

Abstract
Modeling of foraminifera: linking molecules and morphology
Authors: Tyszka Jaroslaw , Topa Pawe
Published: July 2021

Abstract
Palynofacies and foraminifera as hidrodynamic indicators of Araguari estuary, Amazon coast, Amapá-Brazil
Authors: Ferreira Danielle Esteves S. , Laut L. L. M. , Carvalho M. A. , Santos V. F. , Figueiredo Jr A. G.
Published: July 2021

Abstract
The "unusual" reproduction of planktic foraminifera: an asexual reproductive phase of Neogloboquadrina pachyderma (Ehrenberg)
Authors: Kimoto Katsunori , Tsuchiya Masashi
Published: July 2021

Abstract
The influence of labile and refractory C-org on benthic foraminifera: a laboratory mesocosm study
Authors: Koho Karoliina A. , Langezaal A.M. , Lith Y.A. Van , Kouwenhoven T.J. , Zwaan G.J. Van Der
Published: July 2021

Abstract
Planktonic Foraminifera biostratigraphy at the Jerissa area, (CES section in north-western Tunisia), and the impact of the Cenomanian-Turonian Oceanic Anoxic Event (OAE-2) on their assemblages
Authors: Soua Mohamed , Zaghbib-Turki Dalila
Published: July 2021

Abstract
Record of the Paleocene/Eocene boundary global warming impact on deep-sea benthic foraminifers at low latitudes (Kharrouba section: Tunisia)
Authors: Zili Lamia , Zaghbib-Turki Dalila
Published: July 2021

Abstract
Micro- to macro-scale foraminiferal distributions: the contributions of Martin A. Buzas
Authors: Culver Stephen J.
Published: July 2021

Abstract
From blue skies science to practical application: increasing need for retrospectivein environmental micropaleontological monitoring (REMM)
Authors: Alve Elisabeth
Published: July 2021

Abstract
Foraminiferal assemblages in subsurface sediments of the upper continental slope, north Bahia, Brazil
Authors: Araújo Tânia Maria Fonseca , Machado Altair De Jesus
Published: July 2021

Abstract
Deep-sea benthic foraminifera of Campos Basin, SE Brazil: distribution, taxonomy and response to climatic and eustatic variations in the late Quaternary
Authors: Barbosa Valquíria Porfírio , Koutsoukos Eduardo A. M.
Published: July 2021

Abstract
Foraminifera as health bioindicators in nearshore and offshore Brazilian coral reef sediments
Authors: Oliveira-Silva Patricia , Barbosa Cátia Fernandes , Seoane José Carlos Sícoli , Ferreira Beatrice Padovani , Cordeiro Renato C. , Soares-Gomes Abilio , Almeida Carine M. de , Queiroz Gustavo P. , Duran Débora , Lamana Thais
Published: July 2021

Abstract
Modern distribution of benthic foraminifera from the Tagus Prodelta and Estuary, Portugal
Authors: Bartels-Jónsdóttir Helga Bára , Bartels-Jónsdóttir Karen Luise , Sch¶nfeld Joachim , Eiríksson Jón
Published: July 2021

Abstract
Morfologia de osteodermos de crocodilomorfos do Sítio Paleontológico de Peirópolis (Bacia Bauru, Cretáceo Superior)
Authors: Marinho Thiago Da Silva , Ribeiro Luiz Carlos Borges , Carvalho Ismar De Souza
Published: July 2021

Osteoderms are dermal bony plates situated over the epiderm and covered by queratin layer. Until now are recognized at the Paleontological Site of Peirópolis three distinct crocodylomorph species, the Peirosauridae Peirosaurus termini Price, 1955 and Uberabasuchus terrificus Carvalho; Ribeiro & Ávilla, 2004 and the Trematochampsidae Itasuchus jesuinoi Price, 1955. The peirosaurids have nostrils frontally positioned within the skull and are regarded as terrestrial crocodylomorphs. The trematochampsids differently from the peirosaurids have the nostrils positioned at the dorsal portion of the skull, similar to the extant crocodiles with aquatic habits. The osteoderms morphological analysis of P. tormini, U. terrificus and I. jesuinoi corroborate, with the cranial evidences, for the terrestrial or aquatic lifestyle of these animals.
Avaliação da poluição antrópica usando padrão de distribuição de espécies de foraminíferos provenientes de testemunhos da baía de Guanabara, RJ
Authors: Figueira Brígida Orioli , Vilela Claudia Gutterres , Baptista Neto José Antônio
Published: July 2021

This work presents a study of benthic foraminifera recovered from three cores collected near the Paquetá island, in the Guanabara bay, Rio de Janeiro, southeastern Brazil. The cores have different sizes and were subsampled in centimetric intervals. The recovered benthic foraminiferal assemblages were thoroughly identified, in order to carry out an ecological study towards reconstructing the environmental evolution of the studied area during the recent historical period and assessing the response of the foraminiferal assemblages to the locally occurring natural and/or anthropogenic impacts. The microfaunal distribution results were correlated with the sedimentological and TOC (Total Organic Carbon) data to understand the environmental trends and evaluate the varying patterns of human-related pollution in the area. 14C isotopic date was taken at the bottom of one core, to help for the local sediment accumulation rates. Species diversity values were low in all samples, whereas the TOC values were commonly high, increasing dramatically upwards across the cores. The dominant species in that area of the Guanabara bay were Ammonia tepida, Elphidium spp. and Buliminella elegantissima. Patterns of the distributions of these species confirm the influence of the anthropogenic pollution toward the top of the cores.
A contribuição dos museus para a institucionalização e difusão da paleontologia
Authors: Vieira Ana Carolina Maciel , Novaes Mariana Gonzalez Leandro , Matos Juliana Da Silva , Faria Ana Carolina Gelmini , Machado Deusana Maria da Costa , Ponciano Luiza Corral Martins de Oliveira
Published: July 2021

Since the calls "cabinets of curiosities", the essence of natural history was consolidating itself with the birth of the museums and the development of the Museums of Natural History. This consolidation was reached through following activities: expeditions, field trips, collection classification works, catalogues of diffusion of scientific knowledge, educativ activities and expositions. The present paper intends to discuss the importance of the museal institutions for the studies of Paleontology; since the museums of Natural History had exerted a pioneering paper in the institutionalization of certain areas of knowledge, as Palaeontology, Anthropology and Experimental Physiology, in Brazil. The Paleontological studies in museums had collaborated in the specialization and modernization of the appearance of "new museum idea". As this new concept the museum is a space of diffusion of scientific knowledge, represented as an object that reflects the identity of the society without an obligator linking with physical constructions. However, the Brazilian museums have been sufficiently obsolete, with problems that involve acquisition and maintenance of collections to production of temporary or permanent exhibitions. When the Brazilian institutions of natural history are analyzed they are not organized on the new museum conception and the digital age as the North American and European ones. Despite the difficulties found by the Museums since its birth as Institution in the 18th century, the contemporary development of Museology and Palaeontology as Science had contributed for the consolidation and institutionalization of both, helping the diffusion of scientific knowledge.
Análise da composição cianobacteriana das esteiras pustulares em salina, Araruama, Rio de Janeiro
Authors: Silva Loreine Hermida da Silva e , Feder Fabiane , Delfino Deise De Oliveira , Lopes Frederico Alves dos Santos
Published: July 2021

Julieta saline receives water from lagoa de Araruama, which is located in the state of Rio de Janeiro, to the East of the city of Araruama and to the west of the city of Cabo Frio, between 22º49' and 22º57' S latitude and 42º00' and 42º23' W longitude. It is composed by a series of soil tanks obtained by natural excavation, where water gradually concentrates through natural evaporation until salt precipitation. The reservoirs can be divided in three types, according to their activity: cargo, evaporator and crystallizer tanks. The process of making such reservoirs waterproof is enabled by a fine layer of algae which is formed naturally with the passing of time. This study is based on monthly collects within the period ranging from May, 2004 to October, 2004, along three collection stations set up in different saline reservoirs. To identify the microbic composition, fresh, semi-permanent and permanent laminae were obtained and their analysis were performed by means of optical microscopy. The analysis revealed a total of twenty cyanobacterial types. In all layers, a predominant amount of oval spherical forms was observed. The predominance of cyanobacteria is justified by the fact that they are carriers of high morphological adaptations which enables them to survive in various types of environments and be predominant in hypersaline sites.
Paleontologia: 50 anos de ensino e pesquisa no Departamento de Geologia da Universidade Federal do Rio de Janeiro
Authors: Carvalho Ismar De Souza
Published: July 2021

The education on Paleontology at Universidade Federal do Rio de Janeiro presents three distinct stages. In a first phase, in the context of the Universidade do Brazil, it was developed exclusively in the Faculdade Nacional de Filosofia. In 1965, with the fusion of the Geology Course, established by CAGE in 1958, to the Universidade do Brazil, there is the beginning of a new stage, in which widen the number of professionals researching and teaching paleontological topics, and also the number of disciplines related to this science. In 1969, due the establishment of the Graduate Programme in Paleontology-Stratigraphy of the Geosciences Institute, a third phase is recognized, characterized by the large plurality in the researches and education on paleontological subjects. In this study is present the history of the education on Paleontology at Universidade Federal do Rio de Janeiro, as well as the scientists that collaborated to the undergraduate and graduate of geoscientists and paleontologists in this institution.
Estudo sedimentológico e geomicrobiológico das esteiras microbianas tipo filme da lagoa Pitanguinha, região dos lagos, Estado do Rio de Janeiro, Brasil
Authors: Silva e Silva Loreine Hermida da , Damazio-Iespa Cynthia Moreira , Iespa Anderson Andrade Cavalcanti
Published: July 2021

The lagoa Pitanguinha has an area of approximately 0.55 kmÂ², of which 1.5 km are in length, it is located between the latitudes of 22º 55'42''and 22º 56'00'' S and longitudes of 42º20'45'' and 42º20'30'' W, at the restinga de Massambaba, near the district of Araruama. The microbial mats are laminate organosedimentary structures and have been called "algal mat", "cyanobacteria mat" and "potential stromatolite", because there is the predominance of cyanobacteria species that are responsible for the formation of the laminate sediment structure. These mats are the oldest known ecosystem. The aim of this study is to determine the geomicrobiology and sedimentary composition of film microbial mats at lagoa Pitanguinha. The film mat appeared to be placed at the intertidal region and has the form of a flat laminae, with a porous and coherent aspect, being composed of lithified sediment compound with crystalclear incrustation. In its inner side the presence shell fragment of bivalve, microgastropod, ostracod and quartz grains of sand size. The main species of cyanobacteria present in the film microbial mat is Entophysalis granulosa Kützing 1843. On the superficial layers of the film microbial mats, sediment grains are much more united due to the presence of filament cyanobacteria that traps and unites the sediment. The rest of the space is filled by spherical cyanobacteria. On deeper layers of the film microbial mats, sediment grains are much more scattered, due to the presence of few filament cyanobacteria and many spherical ones.
O laser scanner e a paleontologia em 3D
Authors: Medeiros Marco André Malmann , Favera Jorge Carlos Della , Reis Márcia Aparecida Fernandes dos , Silva Tito Lyvio Vieira e , Oliveira Eduardo Barreto , Biassusi Rafael Aguiar , Silveira Renan Garcia da
Published: July 2021

The introduction of laser scanning for imaging let paleontologists determinate, with higher detail level, the taphonomic positions of fossils in a rock outcrop. It also registers, with millimeters precision, the shape and position of some ichnofossil, like tracks and footprints. With all that, entire digital rock outcrops can be created and preserved for future studies. The initial data acquired by the software Cyclone is editable in any CAD software, allowing their rendering as well as the possibility of a future reconstruction using prototypes.
Caracterização de parâmetros hidráulicos em depósitos fluviais paleogênicos na Bacia de Volta Redonda, RJ
Authors: Barboza Ana Carolina Lisbôa , Silva Jr Gerson Cardoso da , Mello Claudio Limeira
Published: July 2021

The present study aims for the characterization of the hydrogeological parameters of the Paleogenic fluvial deposits of Volta Redonda Geological Basin, through hydraulic conductivity determinations and grain sized analyses. The overall goal was to produce a hydrogeological data base applicable to the characterization of hydrofacies (interconnected sedimentary bodies with distinct hydraulic properties) and the modeling groundwater flow. The used methods used consisted of in situ permeability determinations (Guelph permeameters) and laboratory tests (variable head permeameter), besides grain size analyses carried out in each sedimentary facies in the study area. These sedimentary facies were characterized by Marques (2006) and belong to the Resende and Pinheiral formations. The permeameter results were coherent to the sedimentological characteristics. The Resende Formation sedimentary deposits are constituted by medium to fine sand with presence of argillaceous matrix and present moderate to very low hydraulic conductivity, varying between 10-4 to 10-8 cm/s, which indicates a poor reservoir. The Pinheiral Formation presents sandy layers with conglomeratic lenses, limited by small thickness pelitic intervals, with a very low permeability, with a hydraulic conductivity varying between 10-5 to 10-7 cm/s. The upper layer has the maximum permeability, around 10-3 cm/s. This formation presents a medium reservoir characteristics and it must be taken into consideration that the upper layer has as role in recharge to the aquifer. From the results of hydraulic conductivity, that varies from 10-8 to 10-3 cm/s for the Resende and Pinheiral formations, it is concluded that these deposits a low to medium hydraulic conductivity, explaining the low productivity of the water-bearing multilayered aquifer of Volta Redonda Basin.
Climatologia sazonal dos Jatos de Baixos Níveis na região metropolitana de Porto Alegre, no período de 1989 a 2003, utilizando dados de radiossondagens
Authors: Campos Cláudia Rejane Jacondino de , Santos José Guilherme Martins dos
Published: July 2021

The aim of this work was to develop a climatology observational study of the Low-Level Jet (LLJ), observed at Porto Alegre-RS-Brazil metropolitan region, using 1989-2003 at 00:00 and 12:00 UTC upper-air observations, from Porto Alegre International Airpot station. The LLJ classification criteria proposed by Bonner (1968) and modified by Whiteman et al. (1997) were applied to determine the LLJ occurrence. Afterwards the LLJ selected were separated by season (autumn, winter, spring and summer) and then were classified according to: i) LLJ intensity, ii) more frequent height of LLJ occurrence and iii) LLJ predominant direction. The results showed that the LLJ have been more frequent in spring (12:00 UTC) and in summer (00:00 UTC). Mostly of them presented velocity between 10 and 16 m s-1, and seems to occur in distinct heights depending on the time (at 00:00UTC in 600 m and at 12:00 UTC in 900 m). The LLJ predominant direction showed that at 00:00 UTC, the LLJ were more frequent in the east quadrant, while at 12:00 UTC, this predominance was verified in the west and north quadrants.
Levantamento das cianobactérias psâmicas em sedimentos superficiais marginais da Lagoa Azul, Arraial do Cabo, Rio de Janeiro
Authors: Silva Loreine Hermida da Silva e , Iespa Anderson Andrade Cavalcanti , Iespa Cynthia Moreira Damazio , Faruolo Teresa Cristina Lopes Medeiros
Published: July 2021

The coastal area of the Rio de Janeiro State presents a series of lagoons, dune fields and strand plains, which are the result of the paleogeographical evolution during Neogene. The lagoa Azul is situated at 22º56'52"S and 42º04'62"W in the Arraial do Cabo, located about 160 km far the city of Rio de Janeiro. It is a natural hypersaline coastal aquatic body which, parallel to Atlantic Ocean. The present work focused on the identification of psammic cyanobacteria in the surface sediments of the lagoa Azul. The samples were obtained by using plastic tubes and were later aconditiones in opaque plastic containers and conserved in a 4% solution of formaldehyde. With the material obtained, permanent slides were prepared so as to characterize them phycologically. Qualitative analysis showed the presence of 14 species and the occurrence of the families Chroococcaceae Nägeli 1849 (5 sp.), Phormidiaceae Anagnostidis & Komárek 1988 (4 sp.), Synechococcaceae Komárek & Anagnostidis 1995 (2 sp.), Nostocaceae Kützing 1843 (1 sp.), Oscillatoriaceae Gomont 1892 (1 sp.) and Pseudanabaenaceae Anagnostidis & Komárek 1988 (1 sp.). The incidence of these species is also recorded in other lagoons (Araruama, Pernambuco, Pitanguinha and Vermelha) in the northeast of Rio de Janeiro coast, such as the frequency of cyanobacteria is justified by the harsh environment, without predation, with high salinity, elevated temperature and low concentration of oxygen
Complexo Convectivo de Mesoescala observado em 27/11/2002 no nordeste da Argentina
Authors: Campos Cláudia Rejane Jacondino de , Lima Edna Cristina Sodré , Pinto Luciana Barros
Published: July 2021

In this work were analyzed the synoptic situations associated to a Mesoscale Convective Complex (CCM), observed on 11/27/2002 in the northeast of Argentina. Infrared imagery from GOES-8 and simulations from BRAMS regional model were used. The model simulation, with three hours issues, allowed detailing the behavior of the meteorological variables in large scale that affect the MCC life cycle, being able to reproduce the suitable conditions to its beginning, development and dissipation. The results showed that the MCC studied presented similar characteristics to those observed by several authors
Contribuições do segundo e do terceiro modos internos de gravidade para a resposta do movimento vertical
Authors: Buchmann Julio
Published: July 2021

In earlier papers of a series of real data integrations of the National Center for Atmospheric Research Community Climate Model with tropical heat anomalies display regions of pronounced subsidence and drying located several thousand kilometers westward poleward of the heating for cases of tropical Atlantic heating and tropical east Pacific heating. This highly predictable sinking response is established within the first five days of these integrations. The normal-modes of a set of adiabatic primitive equations linearized about a basic state at rest are used to partition model response into gravity-inertia and Rossby modes. The most important contribution for the vertical motion response comes from the gravity modes added for all vertical modes. The principal emphasis is given upon the contributions of the second and third internal vertical modes (with equivalent depths on the order of a fews hundred meters) for the vertical motion response
A ética numa sociedade tecnológica: o contrato tecnológico
Authors: Barros Henrique Lins de
Published: July 2021

Based a reflection about the different approaches of science popularization of the XX century we propose a new role that should be achieved in the present, when the society fastly appropriates new technologies. An analogy between European society of the XVIII century questions is presented with present environmental impact questions due to the continuous consumption is presented. We propose that knowledge socialization is the purpose of science popularization. This knowledge socialization is understand as an integration process of the citizen in the society, leading to conducts, behaviors and attitudes as a function of habits, norms and beliefs originated in the social group identity. This new role of science popularization characterizes a technological contract.
Megafauna do Quaternário tardio de Baixa Grande, Bahia, Brasil
Authors: Ribeiro Ricardo Da Costa , Carvalho Ismar De Souza
Published: July 2021

It is presented the first occurrence of the late Pleistocene - Holocene mammals fossils in a gnamma-like deposit in the Baixa Grande municipality, Bahia State. The identified taxa were Eremotherium laurillardi (Pilosa - Megatheriidae), Panochthus greslebini (Cingulata - Glyptodontidae), Toxodontinae (Notoungulata - Toxodontidae) and Stegomastodon waringi (Proboscidea - Gomphoteriidae). The inferred ecology for this fauna is related to a savanna/forest habitat, in a more wet climate than the present-day semi-arid climate.
Favorabilidade de aquíferos fraturados: Bacia Hidrográfica do Rio São Domingos - estado do Rio de Janeiro
Authors: Lima Luana Alves de , Silva Jr Gerson Cardoso da , Menezes Juliana Magalhães , Seabra Vinícius Da Silva
Published: July 2021

Studies of aquifer favorability have been developed to reduce uncertainty in water well location and to define the hydrogeological potential of crystalline aquifers. The use of geoprocessing tools and Geographic Information Systems (GIS) proved efficient in determination of areas with a higher hydrogeological potential. The area of study is the São Domingos River Basin (SDRB), located in the Northwestern Region of Rio de Janeiro State, Brazil, including the entire São José de Ubá and a small part of Itaperuna municipalities. The main objective is to determine the hydrogeological favorability of the SDRB as a contribution to the management of the region's water resources, as well as elaborate a methodology to produce a cartography of hydrogeological favorability. As a result, hydrogeological favorability maps of SDRB were elaborated, comprising five classes of favorability, with two great domains: the central portion presenting classes of higher favorability and the upper basin with classes of lower favorability. The conclusions are: 1) favorability of the SDRB is strongly conditioned by the basin's geologic-structural settings; 2) the method used proved efficient in the evaluation of the fractured aquifers favorability.
Investigações geofísicas visando a modelagem de cordões arenosos da baía de Sepetiba, Itaguaí, Estado do Rio de Janeiro, Brasil
Authors: Fagner Oliveira Almeida , Rocha Paula Lúcia Ferrucio da , Carelli Soraya Cardel , Plastino Roberto H
Published: July 2021

This paper presents the modeling of sand ridge deposits located in the coastal region of the Sepetiba bay, at the Itaguaí County, State of Rio de Janeiro, based on a geophysical survey using ground penetration radar (GPR) and electric sounding (VES). Until the present there is no detail regional mapping discussing the origin of these deposits. The purpose of the study is the subsurface geophysical characterization of the sedimentary deposits to be integrated with a geological model for the whole area. The SEV acquired in sand ridges showed high resistivity at the first geo-electrical layer that correlates to sand deposits. However, the VES acquired between sand ridges showed low resistivity on the same deep correlated to clayey deposits. The GPR data on the sand ridges, showed inclined reflectors indicated progradation of the sediments. Gradix IV and IPI2win were used for processing and interpretation of the data. Results showed coherence with the available information about the local geology, beyond a clear correlation with the hand auger soundings in the area.
Interpretação gravimétrica na Borda Norte do Cráton do Congo, Sul de Camarões
Authors: Shandini Yves N , Tadjou Jean Marie , Tabod Charles T , Fairhead James Derek
Published: July 2021

Gravity data in the southern Cameroon are interpreted to better understand the organization of underlying structures throughout the northern edge of the Congo craton. The Bouguer anomaly maps of the region are characterized by an elongated SW-NE trending negative gravity anomaly which correspond to a collapsed structure associated with a granitic intrusion beneath the center of the region and limited by fault systems. We applied 3-D gravity modelling and inversion in order to obtain the 3-D density structure of the area. Our result demonstrated that observed gravity anomalies in the region are associated to tectonic structures in the subsurface. The resulting model agrees with the hypothesis of the existence of a major continental collision zone between the Congo Craton and the Pan-African belt. The presence of deep granulites structures in the northern part of the region expresses a continental collision.
Mineração versus Paleontologia: uso e ocupação da serra do Veadinho em Peirópolis - Uberaba, Estado de Minas Gerais (Brasil)
Authors: Santos Wellington Francisco Sá dos , Carvalho Ismar De Souza , Fernandes Antonio Carlos Sequeira
Published: July 2021

Peirópolis is a quarter located in Uberaba County (Minas Gerais State) that has an extraordinary paleontological site of the Late Cretaceous period. This area has many vertebrate fossils, mainly dinosaurs. A great amount of these fossils were found in sandstones of the serra do Veadinho. However, a lower limestone level was economically mining by European's immigrants between 1890 and 1960. In this period, the explotation was accomplished through manual exploration's techniques contributing to the discovery of fossils. Although, in 1987, the mineral explotation was conducted through mechanical techniques, causing environmental impacts and fossil destruction. Therefore, a judicial dispute has started to the use and occupation of the area between the miner activity, local population and geoscientists. Nowadays, the area is for exclusive use of the paleontological research and, in the future, touristic activity. In this context, was analysed a historic review of the use and occupation of serra do Veadinho to examine the compatibility between miner activity and paleontological research.
Uma revisão qualitativa enfatizando aspectos climáticos da Amazônia e da região Nordeste do Brasil
Authors: Santos Isimar De Azevedo , Buchmann Julio
Published: July 2021

This paper is a review covering several physical factors that affect and define the behavior of the climate of the Amazonia and Northeastern Brazil. This review show the changes that may be debited to the presence and action of man, in conjunction with the fluctuations that nature imposes on the climate of these two regions in particular. The conclusion is the perception that it is possible to act so smart on the tropical South-American environment for the well being of the same man who until now was a destructive agent. However the risk remains if we exceed the threshold that would make the damage irreparable.
Biopolímeros, Carbono e Enxofre Totais Associados à Atividade Bacteriana dos Sedimentos Superficiais do Delta do Paraíba do Sul, RJ-Brasil
Authors: Silva Frederico Sobrinho da , Laut Lazaro Luiz Mattos , Santos Elisamara Sabadini , Laut Vanessa Mattos , Crapez Mirian Araújo Carlos , Mendonça Filho João Graciano
Published: July 2021

The Paraíba do Sul River basin is located on the Rio de Janeiro-São Paulo axis, an area of great demographic density and intense industrialization. This work aimed to perform a quali-quantitative analysis of the organic matter (biopolymers, total organic carbon and sulfur) and the bacterial metabolic state in the estuarine-deltaic superficial sediments of the Paraíba do Sul River, relating them to their granulometric distribution. On average, 65.5% of sediments were classified as sandy and poor in carbon and sulfur, with average concentrations of 0.71% and 0.04%, respectively. The C:S element ratio indicates that the environment is predominantly oxidizing, which is coherent with the strong fluvial influence of such a middle-sized river over the estuary. The carbohydrate (average of 2075.93 Î¼g C/g), protein (average of 25.70 Î¼g C/g) and lipid (average of 363.10 Î¼g C/g) biopolymers also presented concentrations lower than those found in other environments. Based on these low concentrations, the environment was classified as meso-oligotrophic. The CARBOHYDRATE:TOC ratio evidenced the impact from anthropic activities, more specifically from the input of domestic effluents along the entire river's course and from the sugar industry, strongly present on its lower course. The bacterial community responsible for organic matter hydrolysis is predominantly anaerobic and facultatively anaerobic, implying in loss of nitrogen to the atmosphere (denitrification) and production of sulfides (sulfate reduction), and the low PROTEIN:CARBOHYDRATE ratios reflect this loss of nitrogen (present in the protein compounds), considering the occurrence of denitrifying bacteria. The bacterial carbon values found are high (3.29 Î¼g C/g) and they are also probably due to the impacts above described