Perchlorate Contamination: Sources, Effects, and Technologies for Remediation

Perchlorate is a persistent pollutant, generated via natural and anthropo genic processes, that possesses a high potential for endocrine disruption in humans and biota. It inhibits iodine fixation, a major reason for eliminating this pollutant from ecosystems. Remediation of perchlorate can be achieved with various physi cochemical treatments, especially at low concentrations. However, microbiological approaches using microorganisms, such as those from the genera Dechloromonas, Serratia, Propionivibrio, Wolinella, and Azospirillum, are promising when perchlo rate pollution is extensive. Perchlorate-reducing bacteria, isolated from harsh Perchlorate is a persistent pollutant, generated via natural and anthropo genic processes, that possesses a high potential for endocrine disruption in humans and biota. It inhibits iodine fixation, a major reason for eliminating this pollutant from ecosystems. Remediation of perchlorate can be achieved with various physi cochemical treatments, especially at low concentrations. However, microbiological approaches using microorganisms, such as those from the genera Dechloromonas, Serratia, Propionivibrio, Wolinella, and Azospirillum, are promising when perchlo rate pollution is extensive. Perchlorate-reducing bacteria, isolated from hars

Monitoring Conservation of Forest in Protected Areas using Remote Sensing Change Detection Approach: a Review

Abstract: Deforestation and fragmentation threaten biodiversity owing to their impacts on many species. To prevent and minimise the problem, protected areas have been created with the aim of conserving biodiversity, and parts of continental territories have been designated for this purpose. However, these areas are not exempt from forest loss and can be directly and indirectly disturbed by surrounding territories, natural disasters, climate, and human actions. In addition, the management quality of many protected areas is unknown. Thus, forest change detection using remote sensing data has been implemented as an approach to assess forest loss in conservation areas, since it generates spatio-temporal information about the protected forest area, which can then be used to improve forest management and decision making. This article reviews the approaches that have been implemented to study forest changes in protected areas. © 2022, Pleiades Publishing, Ltd

CULTURAL IDENTITY OF THE FIRST GENERATION AMERICANS: A QUALITATIVE STUDY

This research explores how meanings drawn from advertising and the mass media may contribute to the cultural identity of young adults who are first generation Americans and children of immigrants. We examine the meanings informants derive about U.S. culture and people, how they interpret the media portrayals of people of different national ancestries, and how such meaning-making affects their daily lives and cultural identity. A key finding is that informants experience a number of conflicts that stem from negotiating multiple and sometimes contradictory cultural messages received from the media, society, family, and friends. We explore the nature of these tensions and the role of the mass media in contributing to them. Moreover, we examine a variety of cultural identity management strategies employed by informants in dealing with these diverse influences. We close by discussing implications for advertising and media managers and avenues for future research

De la infraccion y sancion administrativa tributaria del articulo 97 del Codigo Tributario. Analisis a la luz de la jurisprudencia judicial y administrativa 2001 - 2005

52 p.El presente trabajo trata el tema de las Infracciones y Sanciones del Contribuyente. En la primera parte de esta memoria, veremos conceptos básicos de la relación jurídica tributaria, de su clasificación y objeto, dado que son definiciones necesarias para abordar nuestro tema principal.En el Capítulo II, analizaremos brevemente la judicatura tributaria. Posteriormente, veremos las modificaciones sufridas por la norma tributaria de nuestro estudio, que influye particularmente en la jurisprudencia de los años 2001 a 2005, para llegar finalmente a la situación reciente del la aplicación de sanciones del artículo 97 del código tributario, cuyo objetivo principal es dar a conocer al lector, las más importantes tendencias respecto de la interpretación y aplicación que dicho precepto ha tenido en la jurisprudencia administrativa, y los aspectos discordantes de ella con las del Tribunal de Alzada, buscando concluir, finalmente, cuáles han sido las más importantes observaciones apreciables de ella

Presence of perchlorate in marine sediments from Antarctica during 2017–2020

Perchlorate of natural origin is a persistent pollutant that affects thyroid function by inhibiting iodine uptake, and this pollutant is frequently detected in different ecosystems at concentrations that can harm human health. In this study, we measured the perchlorate concentrations in 3,000 marine sediment samples from January to March in 2017, 2018, 2019, and 2020 during the 3rd, 4th, 5th, and 6th Colombian Scientific Expeditions to Antarctica. The sampling zones were located at 15 different points on the South Shetland Islands and Antarctic Peninsula, and they were measured using a selective perchlorate electrode. The concentration data indicate that perchlorate reached a minimum concentration of 90 ppm on Horseshoe Island and a maximum concentration of 465 ppm on Deception Island, suggesting a spatial variation in perchlorate concentrations that can be attributed to the natural formation of this pollutant due to volcanic eruptions. Additionally, homogeneous distribution of perchlorate was not observed in Antarctic

O Lugar da Mulher e do Negro no Mercado de Trabalho no Pará

O perfil do mercado de trabalho do Estado do Pará mostra alterações nas duas últimas décadas, decorrentes sobretudo da implantação de empreendimentos industriais de grande e médio porte, estimuladores de número expressivo de pequenas empresas prestadoras de serviços. Todavia a expansão decorrente desses novos investimentos e as flutuações do mercado, podem ser acompanhadas apenas através de dados estatísticos aproximativos. Para a Região Metropolitana de Belém (RMB), a qualidade das informações modificou-se positivamente com a realização da Pesquisa de Emprego & Desemprego1. Os dados levantados estão organizados de forma agregada, inclusive totalizando informações de natureza diferente - grupos de cor - o que dificulta uma análise mais refinada desse material. Permitem, porém, identificar tendências e explorar algumas hipóteses que contribuiriam para esclarecermudanças ou permanências de alguns padrões de organização e de reestruturação do mercado de trabalho. As informações qualitatitivas e com corte por ramos - a exemplo de setores industriais como alimentação, construção civil e serviços - ajudariam a ampliar o conhecimento sobre a estrutura e a dinâmica do setor analisado e do mercado. Neste artigo procuramos abordar, com base em fontes sobre emprego, censos demográficos e observações de campo em pesquisas anteriores sobre o perfil do emprego por setores de atividade e mais amplamente, sobre o mundo do trabalho nas empresas estudadas, dois ângulos do perfil ocupacional do Estado do Pará e da Região Metropolitana de Belém - o gênero e a raça2. Sob essa perspectiva buscamos compreender os mecanismos de dominação e as hierarquias presentes na sociedade e que são reproduzidas no mercado de trabalho

Perfil de mulher camponesa no sudeste do Pará

This paper aims to trace the sociological profile of the peasant woman based on life stories, trying to construct the contours of her existence. The discussion placed in the text undertakes an exploratory discourse, to define two angles of the peasant women of southeast Pará – the political practices and the economic practices. An understanding of these practices was attained through life stories told by a peasant woman, with the objective of understanding the relationship between a rural workers union in Marabá and the Landless Workers Movement (MST).Este paper procura traçar um perfil sociológico da mulher camponesa com base em histórias de vida, tentando construir os contornos de sua existência. A discussão colocada no texto empreende um discurso exploratório, com vistas a definir dois ângulos da mulher camponesa do sudeste do Pará o da prática política e o das práticas econômicas. A compreensão dessas práticas foram possíveis através da história de vida contada por uma mulher camponesa, com o objetivo de entender as relações travadas entre Sindicato dos Trabalhadores Rurais de Marabá e o Movimento dos Trabalhadores Rurais Sem Terra - MST

Alianças matrimoniais na alta sociedade Paraense no século XIX

Em 1985, o Pará comemora o Sesquicentenário do grande Movimento Cabano

Comportamiento del dolor musculoesquelético ocupacional en trabajadores de la Alcaldía del municipio de Dolores, Carazo. Julio 2012-Marzo 2013.

Estudio utilizado en este proceso investigativo es cuantitativo, porque la recopilación de datos se realizó en base a la medición numérica, el conteo y frecuente uso de la estadística para establecer con exactitud patrones de comportamiento en una población. Concluye que existe prevalencia de dolor musculoesquelético ocupacional en los trabajadores de la institución municipal lo que orienta hacia la necesidad de la implementación de programas de educación para el empleador y trabajadores, haciendo énfasis en los principios ergonómicos y comprobar la reducción de la prevalencia de dolor musculoesquelético ocupacional