Short communication: Length-weight relationship and condition factor of the nine fish species of bycatch from Northeast Brazilian Coast

The length-weight relationship (LWR) and relative condition factor (Kn) are essential biometric tools in fishery studies. They provide information about the fish's growth, condition, and suitability in its habitat. LWR values were estimated for nine fish (Chloroscombrus chrysurus, Larimus breviceps, Nebris microps, Odontognathus mucronatus, Paralonchurus brasiliensis, Pellona harroweri, Ointmentsys corvinaeformis, Selene setapinnis, Stellifer rastrifer) captured as bycatch in shrimp trawling from commercial trawls, were collected monthly, between March and November 2019. The coefficient b ranged from 2.7547 to 3.4100 and the Fulton and relative condition factor ranged from 0.39 to 1.38 and 1.00 to 1.02, respectively. The current study would provide baseline data about LWR and the relative condition factor for these species captured in northeast Brazilian coast. These data are valuable for establishing a monitoring and management system for this fish specie

IMPACT OF DIFFERENT USE SYSTEMS ON TOTAL AND MINERALIZABLE ORGANIC CARBON IN A SANDY SOIL

O objetivo deste trabalho foi avaliar o impacto de diferentes sistemas de uso nos teores e estoques de carbono orgânico total (COT) e a evolução diária e total do carbono mineralizável (C-CO2) em um Argissolo Vermelho Amarelo de textura arenosa. O estudo foi realizado no município de Eldorado, MS, em uma área de referência de Mata Nativa (MN), e em três áreas manejadas: pastagem permanente (PP), semeadura direta (SD) e área de Reserva Particular de Patrimônio Natural em processo de regeneração natural (RPPN). Amostras de solo das camadas 0,0-0,05, 0,05-0,10 e 0,10-0,20 m foram coletadas para avaliação de densidade do solo (Ds), teores de COT, com posteriores cálculos do índice de estratificação (IE), estoque de carbono (EstC) e variação do estoque de carbono orgânico total (∆EstC), além da determinação da emissão diária e cálculo do acúmulo total de C-CO2. A área de MN apresentou os maiores teores e estoques de COT, chegando a 16,42 g kg-1 e 20,90 Mg ha-1, respectivamente. Já as áreas de PP e RPPN os menores teores e EstC. As áreas de PP, SD, RPPN e MN apresentaram valores de IE de 1,08, 1,13, 1,32 e 1,61, respectivamente. A área de MN apresentou maiores picos e maior acúmulo total de C-CO2. Pela análise multivariada, nenhuma das áreas manejadas se aproximou em qualidade a MN. Os piores resultados nos atributos avaliados são observados nas áreas de PP e RPPN devido ao estágio de degradação destas áreas em função do histórico de exploração e uso do solo.This study aimed to evaluate the impact of different land use systems on total organic carbon (TOC) contents and stocks and the daily and total evolution of mineralizable carbon (C-CO2) in a sandy-textured Argissolo Vermelho Amarelo. The study was carried out in Eldorado, MS, in a reference area of Native Forest (NF) and three managed areas: Permanent Pasture (PP), Direct Sowing b(DS), and an area of Private Natural Heritage Reserve (PNHR) in the process of natural regeneration. Soil samples from the 0.0-0.05, 0.05-0.10, and 0.10-0.20 m layers were collected to assess soil density (Sd), TOC contents, with subsequent calculations of the stratification index (SI), carbon stock (StockC), and variation of the total organic carbon stock (∆StockC), in addition to the determination of daily emission and calculation of total C-CO2 accumulation. The NF area had the highest levels and stocks of TOC, reaching 16.42 g kg-1 and 20.90 Mg ha-1, respectively. On the other hand, the PP and PNHR areas had the lowest content and StockC. The areas of PP, DS, PNHR, and NF presented SI values of 1.08, 1.13, 1.32, and 1.61, respectively. The NF area showed higher peaks and a higher total accumulation of C-CO2, inferring the highest biological activity in this area. By multivariate analysis, none of the managed areas was close to the NF in quality. The worst results considering the evaluated attributes were observed in the areas of PP and PNHR due to the stage of degradation of these areas as a result of exploration and land use history

Solution-Processed Chalcogenide Photovoltaic Thin Films

Chalcogenides-based thin film solar cells are great competitors to beat high efficiencies as silicone solar cells. The chalcogenides that have been commonly used as absorber materials are CIS, CIGS, and CZTS. They present some advantages of having a direct and tunable band gap, high absorption coefficient and respectable efficiency to cost ratio. Solution processable deposition approaches for the fabrication of solar cells attracts a great deal attention due to its lower capital cost of the manufacturing than the vacuum-based techniques. In this chapter, we detail the use of a low-cost method of deposition for the chalcogenide thin films by spin-coating and spray-coating, which is already widely employed in several fields of industries

MarinEye - A tool for marine monitoring

This work presents an autonomous system for marine integrated physical-chemical and biological monitoring – the MarinEye system. It comprises a set of sensors providing diverse and relevant information for oceanic environment characterization and marine biology studies. It is constituted by a physicalchemical water properties sensor suite, a water filtration and sampling system for DNA collection, a plankton imaging system and biomass assessment acoustic system. The MarinEye system has onboard computational and logging capabilities allowing it either for autonomous operation or for integration in other marine observing systems (such as Observatories or robotic vehicles. It was designed in order to collect integrated multi-trophic monitoring data. The validation in operational environment on 3 marine observatories: RAIA, BerlengasWatch and Cascais on the coast of Portugal is also discussed.info:eu-repo/semantics/publishedVersio

Heterofucan from Sargassum filipendula Induces Apoptosis in HeLa Cells

Fucan is a term used to denominate a family of sulfated polysaccharides rich in sulfated l-fucose. Heterofucan SF-1.5v was extracted from the brown seaweed Sargassum filipendula by proteolytic digestion followed by sequential acetone precipitation. This fucan showed antiproliferative activity on Hela cells and induced apoptosis. However, SF-1.5v was not able to activate caspases. Moreover, SF-1.5v induced glycogen synthase kinase (GSK) activation, but this protein is not involved in the heterofucan SF-1.5v induced apoptosis mechanism. In addition, ERK, p38, p53, pAKT and NFκB were not affected by the presence of SF-1.5v. We determined that SF-1.5v induces apoptosis in HeLa mainly by mitochondrial release of apoptosis-inducing factor (AIF) into cytosol. In addition, SF-1.5v decreases the expression of anti-apoptotic protein Bcl-2 and increased expression of apoptogenic protein Bax. These results are significant in that they provide a mechanistic framework for further exploring the use of SF-1.5v as a novel chemotherapeutics against human cervical cancer

Research report of the LookCrim Project, from conceptualization to practice

info:eu-repo/semantics/publishedVersio

Ecofisiologia de mudas de Handroanthus impetiginosus submetidas a diferentes ciclos de rega/ Ecophysiology of seedlings of Handroanthus impetiginosus submitted to different irrigation cycles

Objetivou-se avaliar o comportamento de mudas da espécie Handroanthus impetiginosus (Mart. ex DC.) Mattos quanto aos aspectos ecofisiológicos quando submetidas a diferentes regimes hídricos, em casa de vegetação. Para tanto, um experimento foi realizado no Centro de Engenharias e Ciências Agrárias no Laboratório de Tecnologia da Produção da Universidade Federal de Alagoas. O delineamento experimental foi inteiramente casualizado e consistiu-se de quatro tratamentos (Controle e Ciclos de Rega de três, seis e nove dias), com quatro repetições. Durante o período experimental foram mensurados semanalmente, a altura da planta, o diâmetro do caule e o número de folhas, também foram obtidas as concentrações de pigmentos fotossintéticos (clorofila a, b, total e carotenóides), o teor relativo de água e a produção de biomassa seca. De acordo com os resultados obtidos, pode-se afirmar que mudas de ipê rosa possuem mecanismos de tolerância à seca com alto potencial hídrico, pois na tentariva de suportar as injurias provocadas pela falta de água, as mesmas apresentaram senescência foliar, diminuição do diâmetro do caule e redução da produção de biomassa seca em todos os ciclos de rega. Com o passar do tempo as mudas incrementaram novas folhas com áreas reduzidas, investiram no crescimento do sistema radicular em busca de água e mantiveram a turgescência foliar e os teores de clorofila o que podem ser considerados importantes fatores de rustificação à seca. Outro importante fator é que mudas de Handroanthus impetiginosus são capazes de suportar até 9 dias de estresse hídrico sem apresentar comprometimento ecofisiológico. Levando-se a crer que as mesmas toleram curtos períodos de estiagem em ambiente natural

Biodisponibilidade de Cd em latossolo acrescido de lodo de esgoto

This study was carried out to obtain the bioavailability of cadmium in a latosol increased of a single dose of sewage sludge. Representative samples of Bw horizon of a latosol, from Duque de Caxias city - RJ, and sewage sludge from ETE Ilha do Governador, in Rio de Janeiro city were collected. These materials were characterized due to its chemical, physical and mineralogical characteristics. Latter on, the samples were mixed together and bioavailability tests were accomplished. The results show that cadmium became bioavailable in the solution in the first hour of assay. After this interval the concentration of the available metal in solution it diminished, occurring stabilization in the subsequent hours of collection.O presente trabalho trata do estudo da biodisponibilidade de Cd no horizonte Bw de latossolo acrescido de uma única dose de lodo de esgoto. As amostras de latossolo e de lodo, respectivamente, foram coletadas no município de Duque de Caxias - RJ e na estação de tratamento de esgoto da Ilha do Governador (ETE Ilha), no município do Rio de Janeiro. A parte preliminar do estudo consistiu na caracterização dos materiais em laboratório por meio de ensaios físicos (granulometria, massa específica dos grãos, limites de Atterberg), químicos e físico-químicos (pH, carbono orgânico, CTC, ataque sulfúrico, fertilidade, análise química total) e mineralógicos (mineralogia por difração de raios-X). O lodo posteriormente foi incorporado ao latossolo e avaliou-se a biodisponibilidade do Cd na fração solúvel da mistura em questão. Os resultados mostraram que o Cd tornou-se biodisponível na solução na primeira hora de ensaio. Depois deste intervalo a concentração do metal disponível em solução diminuiu, ocorrendo uma estabilização nas horas subseqüentes de coleta

Water deficit and seasonality study on essential oil constituents of Lippia gracilis Schauer germplasm

The aim of this study was to analyze the chemical composition of the essential oil from leaves of Lippia gracilis genotypes, in the dry and rainy seasons, and with and without irrigation. The extraction of essential oil was realized by hydrodistillation in a Clevenger apparatus. The chemical composition analysis was performed using a GC-MS/FID. The leaves of the L. gracilis genotypes provide essential oil with content between 1.25% and 1.92% in the rainy season and 1.42% and 2.70% in the dry season; when irrigation was used the content was between 1.42% and 2.87%, without irrigation contents were between 1.60% and 3.00%. The chemical composition of L. gracilis showed high levels of terpenes. The major constituent of genotypes LGRA-106 was thymol and carvacrol was the major constituent for the other genotypes. Concentrations showed little variation between seasons, demonstrating the stability of the chemical composition of L. gracilis even with different climatic conditions