This article investigates the influence of adding polyurethane with refined coal to high-strength mortar, evaluating its mechanical and physics. The tests conducted for this study included X-ray diffraction, compressive strength, elastic modulus, and tensile strength. Results showed that the compressive strength of the mortar decreased when refined coal was incorporated into the reference mortar, and the inclusion of polyurethane in this mixture led to a further reduction in compressive strength. Additionally, a decrease in the elastic modulus was observed with the addition of refined coal, and the inclusion of polyurethane in this mixture caused an additional reduction. The porosity of the mortar significantly increased with the addition of polyurethane to the mortar containing refined coal. In summary, adding polyurethane and refined coal to high-strength mortar compromises its mechanical properties, particularly through a re-duction in compressive strength, elastic modulus, tensile strength, and an increase in porosity. Although polyurethane contributes to flexibility and adhesion between particles, its interaction with refined coal creates a more porous structure, potentially impairing the material’s durability and strength.

Background: Beetles (Coleoptera) have been recognized as providing significant entomological evidence in the medico-legal field, particularly with reference to dry human remains. The information collected from carrion beetles in Abakaliki will add to the global data base to assist coronary investigators unravel mysteries surrounding suspicious death in Nigeria. A study was carried out to investigate the succession of beetle fauna in a decomposing pig carrion in Abakaliki Ebonyi State. The study was conducted on poisoned pigs using sniper at the pericardium region and beetles were collected using standard entomological methods. Results: The study lasted twenty-two days with notable characteristic changes observed at the five decomposition waves. A total of five families, and twelve species were collected at various succession pattern of decomposition. The results showed that Buphonella species and Necrubia species were recorded at high interval among the decomposition stages, While Dermestidea recorded the highest family observed. The result also revealed that most beetles collected arrived at the dry decay stage with few attendant patterns at earlier stages. Conclusion: However, this study confers the species of Coleopteran insects of forensic importance and gives a background information about their succession in relation to decomposition stages. This could be used to determine the post mortem interval of human corpse based upon knowledge of the fauna.

Manguezais são ecossistemas de grande importância ecológica e econômica, devido aos serviços ecossistêmicos que oferecem para as comunidades humanas. Diversas áreas de manguezal estão localizadas próximas a regiões urbanizadas, o que contribui com a degradação desses ambientes, devido a inúmeros impactos antrópicos. O conhecimento sobre as características morfológicas do solo é essencial para auxiliar propostas de conservação e restauração desses ecossistemas. Dessa forma, o presente estudo teve como objetivo avaliar o crescimento de propágulos e plântulas das espécies Rhizophora mangle (mangue vermelho), Avicennia schaueriana (mangue preto) e Laguncularia racemosa (mangue branco) em diferentes tipos de sedimentos. O experimento utilizou um delineamento inteiramente casualizado, contendo três tratamentos (A: 100% areia; L: 100% lama; e misto, M: 50% areia + 50% lama), com três repetições cada, totalizando nove propágulos por espécie e 27 mudas no total. As amostras foram mantidas em ambiente com boa iluminação, regadas com água doce e medidas semanalmente, durante 15 semanas (de agosto a novembro de 2022). Todos os propágulos tiveram 100% de germinação nos três tipos de sedimento. Para verificar se os tratamentos tinham efeitos significativamente diferentes no desenvolvimento das mudas, foi realizada uma análise de variância e o Teste de Scott-Knott. Foi observado que os substratos lama e misto mostraram os melhores resultados de crescimento para as três espécies. O sedimento misto pode ser uma boa alternativa para o cultivo de mudas de mangue e projetos de restauração de manguezais, uma vez que demanda menos sedimento fino (lama) do próprio ecossistema.

The objective of this study was to provide information about the structure and composition of the Capitellidae family in Balneário Camboriú, as well as evaluate its space-time variations. Four sampling campaigns were carried out at 16 stations, distributed in the Camboriú River and Balneário Camboriú Bay. A total of 1,769 ind.m² were collected and identified into five taxa: Capitella sp.; Capitella cf. nonatoi; Heteromastus sp., Heteromastus similis and Mediomastus cf. californiensis. The most abundant taxon was M. californiensis, showing the highest number of individuals during autumn, followed by Capitella cf. nonatoi in the summer. The distribution of M. californiensis was more related to the opportunistic habit of the species than to seasonality, while Capitella cf. nonatoi distribution was related to the high concentration of organic matter from the Camboriú River, which may be the result of residents and tourists visiting the city in the summer. These results denote the Capitellidae family bioindicator potential for anthropogenic disturbances.

O presente trabalho tem como objetivo avaliar a adição da cinza da casca do arroz em matrizes de cimento Portland. A cinza de casca de arroz tem como sua principal característica as propriedades pozolânicas, podendo ser utilizada como adição devido ao alto teor de sílica. Consequentemente, quando adicionadas, podem vir a melhorar o empacotamento e impedir o acesso de agente agressivos, além da contribuição para a sustentabilidade. Para isso, foram realizados ensaios de caracterização do cimento, da cinza e do cimento com adição de cinza, assim como foram realizados ensaio de resistência à compressão, para buscar resultados de percentuais ótimos que não comprometam a resistência do cimento. Após a verificação do comportamento, com base na NBR 5739 foi avaliado que o percentual que apresentou o melhor desempenho foi o Traço 5 com adição de 10% de cinza.

In recent years, light detection and ranging (LiDAR) technology has gained popularity in various applications, including remote sensing of Particulate Matter (PM) absolute concentrations. Raymetrics PMeye is a unique platform consisting of a state-of-the-art scanning lidar, innovative algorithms and auxiliary sensors, used for large areas PM concentrations monitoring. Using a novel inversion scheme for transforming raw signals to aerosol concentrations, PMeye is one of its kind for aerosol monitor in urban or/and industrial areas. Measurements performed at a steel factory in Latin America, a highly variable area in terms of emission sources, support the effectiveness of the overall system. Measurements evaluation against a light scattering in situ PM counter, placed at major emission sources on various ranges and directions from the lidar, present high correlation and very low mean relative differences.

The present study aims to estimate the height of smoke aerosols and clouds from the Advanced Topographic Laser Altimeter System (ATLAS) instrument sensor onboard the Ice, Cloud and land Elevation Satellite-2 (ICESat-2). The study was conducted during the dry season on September 14th of 2020, when there was a large number spot of biomass burning fires and smoke aerosol layers over the Amazon and the South American region. Most often, the smoke plumes move with southward winds, along the east of the Andes. During this period occasionally polar cold fronts move from the south, meeting the smoke aerosol layers. Initially, daily images from the polar orbit satellites such as Terra, Aqua, NOAA and Suomi were used to identify the spatial location of smoke plumes and clouds over the region. Then, ICESat-2 tracks were analyzed to evaluate their presence in the study area. The results show that ICESat-2 data retrieval is able to estimate the height of the aerosol layer and the top of the cloud. Some tracks show clearly higher clouds, with tops reaching about 12-13 km, when there is the presence of a cold front or deep convective cumulonimbus. Over clear sky regions where smoke is observed, estimated heights from the lidar are on the order of 3-4 km. Local profiles of temperature obtained from radiosondes show inversion layers at similar heights as detected by the lidar sensor. These inversion layers seem to be associated with the warming effect of the absorbing biomass burning aerosols.

Methane is one of the main greenhouse gases, impacting a lot on the radioactive forcing, contributing a lot to global warming. Identifying methane generating sources are important in mitigating actions, mainly of anthropic origin. In this work, methane emissions were observed in two distinct areas, one with low anthropogenic impact and the other with high industrial activity. A resonant cavity spectrometer (CRDS) was used to analyze methane concentrations during the months of June and July/2019 in the city of Itanhém and in the months of September, October and January of 2019 in the city of Cubatão.

No Brasil, a Construção Civil é um segmento de grande relevância para o crescimento econômico e social do Brasil. No entanto, é um dos setores que provocam impactos ambientais no país. Os Resíduos de Construção e Demolição (RCD) são materiais provenientes de construções, reformas, reparos e demolições de obras de construção civil, e os oriundos da preparação e da escavação de terrenos (CONAMA, 2002). Estes materiais, são encontrados, com frequência, descartados de maneira irregular em terrenos abandonados, gerando impactos ao meio ambiente. Na cidade de Serra Talhada, também foi possível encontrar em algumas regiões o descarte dos resíduos de construção e demolição de maneira irregular, o que provoca diversos problemas ambientais e sociais. Portanto, o presente estudo tem por principal objetivo o diagnóstico dos impactos ambientais causados pela deposição dos resíduos de construção e demolição no bairro do Alto Bom Jesus localizado no município de Serra Talhada-PE. Para isto, foram realizadas revisões bibliográficas sobre a temática, visitas técnicas ao bairro Alto Bom Jesus, com o objetivo de catalogar os impactos ambientais observados no local e a elaboração da Matriz de Impacto com a análise detalhada dos principais impactos ambientais observados na área. Dentre os impactos ambientais encontrados estão a contaminação química e biológica e a alteração das propriedades físicas do solo e da água; a alteração da qualidade do ar devido a presença de poeira ou gases; alteração nas condições de saúde e segurança da população devido ao aparecimento de vetores de doenças; alteração da qualidade paisagística; o aumento das despesas do município e os impactos sobre os arbustos, as árvores e os animais que podem estar localizados próximos aos locais de descarte de RCD.

Water resources are restrictive elements for the various forms of life on the planet, whether animal, plant or human. Thus, there is a need for studies aimed at the creation and use of tools and instruments for environmental management seeking to ensure the different uses of water. The objective of the research was to verify the bathing capacity and the conditions of the environmental quality of four bathhouses in the city of Coxim, MS. The adopted methodology was a descriptive research, accompanied by analysis of primary data compared with the legislation in force during the period from August 2019 to the month of July 2020. The parameters analyzed were Thermotolerant Coliforms, Escherichia coli , Dissolved Oxygen, pH (Hydrogenic Potential), Temperature and Conductivity. The sampling was carried out in accordance with the standards established by the Brazilian Association of Technical Standards and the Environmental Company of the State of Sao Paulo – CETESB (2019). For analysis, the analytical methods defined in the Standard Methods for the Examination of Water and Wastewater (2016) were used. The spas studied presented themselves as unsuitable for primary contact recreation in both bathing indices studied. However, the OD, pH and conductivity values are in accordance with the VMP stipulated by CONAMA Resolution 357/2005 for freshwater bodies classified as Class 2. Monitoring and investigation of the probable cause of the increase in coliforms is necessary in order to can apply preventive practices to maintain control of water quality conditions for bathing purposes.