scholarly journals Flow-by-flow chemical stratigraphy and evolution of thirteen Serra Geral Group basalt flows from Vista Alegre, southernmost Brazil

2011 ◽  
Vol 83 (2) ◽  
pp. 425-440 ◽  
Author(s):  
Viter M Pinto ◽  
Léo A Hartmann
Keyword(s):  
Chemical Composition ◽  
Horizontal Position ◽  
Southern Brazil ◽  
Native Copper ◽  
Geochemical Characterization ◽  
Economic Significance ◽  
Basaltic Composition ◽  
The World ◽  
World Class

The geochemical characterization of thirteen Serra Geral Group flows in the Vista Alegre region (RS-SC), southern Brazil, displays the homogeneous basaltic composition near 50 wt.% SiO2. Each of the five basal flows (Pitanga-type, high-Ti/Y ~600, TiO2 > 3 wt.%) and eight upper flows (Paranapanema-type, medium Ti/Y ~400, TiO2 > 2 wt.%) can be identified from their chemical composition; sets of flows have parallel variation in chemical composition. The flow-by-flowcorrelation in four sections shows the horizontal position of the flows in three profiles and an approximately 200-m downdrop of the Itapiranga block with respect to the Frederico Westphalen block. The world-class amethyst geode mineralization and the systematic presence of native copper in the basalts make the correlation of great geological and economic significance.

Impact-induced hydrothermal dissolution in pyroxene: Petrographic and geochemical characterization of basalt-dominated polymict impact breccias from the Vargeão Dome, Brazil

2021 ◽  
Author(s):  
Jennifer Epstein ◽  
Lidia Pittarello ◽  
Álvaro P. Crósta ◽  
Christian Koeberl
Keyword(s):  
Hydrothermal Alteration ◽  
Hydrothermal Fluids ◽  
Terrestrial Planets ◽  
Impact Structure ◽  
Impact Event ◽  
Southern Brazil ◽  
Geochemical Characterization ◽  
Heterogeneous Nature ◽  
The Impact

ABSTRACT Constraints on impact-related hydrothermal alteration are important to enable the reconstruction of the possible processes affecting the surface of other terrestrial planets, such as Mars. Terrestrial impact structures excavated in basaltic targets provide the opportunity for analog studies. In Brazil, seven impact structures have been confirmed so far. Three of them, Vargeão Dome, Vista Alegre, and Cerro do Jarau, were formed in the same basaltic province belonging to the Paraná Basin, and they have several common characteristics. Oxidized basaltic breccias locally containing sandstone clasts occur in all these structures. In this work, selected samples of such breccias from the Vargeão Dome impact structure in southern Brazil were petrographically and geochemically investigated to further constrain the effects of the postimpact hydrothermal alteration. The breccia matrix shows typical oxidation effects induced by postimpact hydrothermal fluids, which highlight its heterogeneous nature, related to the impact event, and mixing components from different pre-impact stratigraphic formations. The detection of partially dissolved exsolution lamellae in pyroxene and of related alteration products constrains the effects of hydrothermal alteration in the basalts of the Vargeão Dome, which could serve as a terrestrial analog for planetary studies.

scholarly journals Advanced characterization of microbeads replacement from cellulose acetate based on empty fruit bunches and dried jackfruit leaves

2018 ◽  
Vol 67 ◽  
pp. 04045
Author(s):  
Dewi Tristantini ◽  
Andersen Yunan
Keyword(s):  
Chemical Composition ◽  
Drug Release ◽  
Cellulose Acetate ◽  
Raw Materials ◽  
Advanced Characterization ◽  
Chemical Components ◽  
Wide Scope ◽  
Empty Fruit Bunches ◽  
The World

The existing polymer microbeads for skin extraction ingredients have many disadvantages in environment. The application of cellulose has been proven in the pharmaceutical field in the form of beads on drug release can be a substitute alternative to polymer microbeads that will be prohibited. Based on several criteria and past researches, cellulose acetate meets the criteria for microbeads replacement. Cellulose is available in large quantities in the world, and many studies has proven its application on a wide scope. Empty Fruit Bunches (EFB) and Dried Jackfruit Leaves (DJL) are widely distributed raw materials in Indonesia so that they can be used as a substitute for microbeads. The FTIR and SEM-EDX tests were conducted to determine the functional groups of cellulose acetate and morphology formation of cellulose acetate both raw materials and their chemical composition. In FTIR testing, the typical absorption of EFB and DJL cellulose acetate is produced by C=O groups for EFB at wavelength 1721,36 cm-1 and DJL at wavelength 1725,22 cm-1, whereas at SEM-EDX, DJL cellulose acetate asymmetrical cylinders and rare small pores on the surface and cellulose acetate TKKS cylindrical symmetrical with small pores on its surface. The chemical components of EFB and DJL cellulose acetate exhibit organic elements of carbon (C) and oxygen (O).

scholarly journals Characterization of the brown leaf spots pathosystem in Brazilian pecan orchards: pathogen morphology and molecular identification

2021 ◽  
Vol 64 (1) ◽  
pp. 75-86
Author(s):  
Tales Poletto ◽  
Marlove Fátima Brião Muniz ◽  
Vinícius Spolaor Fantinel ◽  
Laís Da Silva Martello ◽  
Lucas Graciolli Savian ◽  
...  
Keyword(s):  
Fungal Pathogens ◽  
Pathogenic Fungus ◽  
Large Subunit ◽  
Southern Brazil ◽  
Leaf Spots ◽  
Comprehensive Information ◽  
Brown Leaf ◽  
The World ◽  
Causal Pathogen

Due to the increase in pecan nuts demand, plantation areas are expanding around the world and more frequent epidemics caused by fungal pathogens may occur in orchards and nurseries. Ragnhildiana diffusa is a pathogenic fungus reported to cause brown leaf spots on pecans in numerous countries. The scarcity of comprehensive information in symptoms on the host and morphology of the fungus lead this disease to be initially incorrectly identified in Brazil. In this study, we employed different approaches to characterize the pathogen morphology and pathogenicity and to molecularly identify the organism causing brown leaf spots in southern Brazil. A phylogenetic analysis based on the internal transcribed spacer (ITS) and the large subunit (LSU) gene sequences confirmed R. diffusa as the causal pathogen of the disease. Inoculation tests on healthy leaflets confirmed pathogenicity isolates, although some variation in their virulence was observed. Variation in the morphology of the asexual stage was observed among and within isolates. This study brought unprecedented morphological, genetic and pathogenic information that aids elucidating the disease. The accurate and prompt identification of the disease may assist in controlling further spread of the pathogen into orchards and nurseries still free of the disease in South America.

SOCIAL HOUSING IN THE LIGHT OF THE WORLD SPORTS EVENTS

2020 ◽  
pp. 89-98
Author(s):  
Оксана Викторовна Королева ◽  
Армен Юрьевич Казарян ◽  
Юрий Павлович Волчок
Keyword(s):  
Social Housing ◽  
Fundamental Change ◽  
Social Effect ◽  
Sports Events ◽  
Economic Significance ◽  
Accelerate Development ◽  
The World ◽  
Image Improvement ◽  
World Class

Спортивные мероприятия мирового уровня, такие как Олимпийские и Паралимпийские игры, универсиады, чемпионаты мира по футболу и т. д., имеют масштабное общественно-экономическое значение. Помимо своего прямого спортивного назначения они всегда связаны с большим притоком инвестиций, которые служат катализатором развития и кардинального изменения облика городов, улучшения их инфраструктуры, экономики, фактически обеспечивая регионам новую жизнь. Преобразования, связанные с созданием хорошо продуманной инфраструктуры, дают долгосрочный экономический и социальный эффект в масштабах всей страны, поднимая ее престиж. Позитивные изменения, которые несут Игры, являются одной из причин, по которой с каждым годом все больше стран вступают в борьбу за право проведения и организации подобных мероприятий. World-class sports events such as Olympic and Paralympic Games, universiades, Football World Cups, etc. have great social and economic significance. Apart from their direct sports mission they are closely linked with a large inflow of investments which accelerate development and fundamental change of the cities’ image, improvement of their infrastructure, and economics, and provide new life for the regions. Changes connected with establishing a new well-planned infrastructure ensure a long-term economic and social effect on the nationwide scale which boosts the reputation of any country. Positive changes inspired by the Games are the reasons why more and more countries compete to be the host for such events.

Geochemical Characterization of Irati And Palermo Formations (Paraná Basin-Southern Brazil) for Shale Oil/Gas Exploration

2015 ◽  
Vol 3 (5) ◽  
pp. 481-487 ◽  
Author(s):  
Alessandro da S. Ramos ◽  
Luiz F. Rodrigues ◽  
Gabriel E. de Araujo ◽  
Caroline T. M. Pozocco ◽  
João M. M. Ketzer ◽  
...  
Keyword(s):  
Shale Oil ◽  
Southern Brazil ◽  
Geochemical Characterization ◽  
Paraná Basin ◽  
Parana Basin ◽  
Oil Gas

Culinary tourism on Cape Breton Island

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Erna MacLeod
Keyword(s):  
Tourism Destination ◽  
Cape Breton Island ◽  
Culinary Tourism ◽  
Economic Significance ◽  
Cape Breton ◽  
Local Stakeholders ◽  
Resilient Communities ◽  
World Class ◽  
Ecological Relations ◽  
Developed World

Cape Breton Island is a well-known North American tourism destination with long-standing attractions such as the Cabot Trail and more recently developed world-class offerings such as the Cabot Links Golf Course. Tourism contributes significantly to Cape Breton’s economy, particularly since the mid-20th century as traditional resource-based industries have declined. In the 21st century, culinary tourism has become increasingly important to expand the island’s tourism offerings and to provide “authentic” tourism experiences. This study examines local-food tourism in Cape Breton to illuminate its cultural and economic significance. I conducted interviews with food producers, restaurateurs, government representatives, and tourism executives. I also consulted websites and policy documents and compared local stakeholders’ experiences and perspectives with official tourism strategies. Promoting culinary tourism raises questions of power, autonomy, inclusion, and accountability. My study accentuates possibilities for aligning economic and ecological goals to create resilient communities, foster equitable social and ecological relations, and establish Cape Breton as a culinary tourism destination.

HIGH ENERGY SYNCHROTRON X-RAY MICROSPECTROSCOPY FOR GEOCHEMICAL CHARACTERIZATION OF TERRESTRIAL AND EXTRATERRESTRIAL SAMPLES

2016 ◽  
Author(s):  
Antonio Lanzirotti ◽  
◽  
Stephen R. Sutton ◽  
Matt Newville ◽  
Jeffrey P. Fitts ◽  
...  
Keyword(s):  
High Energy ◽  
Geochemical Characterization ◽  
X Ray
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