scholarly journals The role of sediments in the carbon and pollutant cycles in aquatic ecosystems

2019 ◽  
Vol 31 ◽  
Author(s):  
Simone Jaqueline Cardoso ◽  
Gabrielle Rabelo Quadra ◽  
Nathália da Silva Resende ◽  
Fábio Roland

Abstract Aim Anthropogenic modifications in the landscape are accelerating biogeochemical cycles and causing unbalances in terrestrial and aquatic ecosystems with still unknow impacts on biotic and abiotic processes. Therefore, there has been increasing scientific interest in the links between human activities and ecosystems functions. Methods Here we review the role of aquatic sediments in the carbon and pollutant cycle. Results We briefly explore the historical context, origin, and composition of the sediments, as well as the factors that influence the processes of carbon and contaminants cycling and the role of sediments in the greenhouse gases emissions in aquatic ecosystems. Conclusions Aquatic sediments can help to understand the terrestrial and aquatic ecosystem changes, once they are good sentinels, reflecting key biogeochemical processes over time.

2020 ◽  
Vol 12 (12) ◽  
pp. 4-9
Author(s):  
Pavel A. BUTYRIN ◽  

The historical context in which the State Plan for Electrification of Russia (GOELRO) was developed, establishment of the GOELRO Commission, the GOELRO Plan content, the specific features of its implementation, and the role of the plan in the soviet period of Russia’s history are considered. Attention is paid to the electrification plants of other countries and territories of all inhabited continents, and to the participation of states in the electrification of countries and regions with small-scale and agricultural production in the 1920 s. The specific features pertinent to the electrification of the Russian Socialist Federative Soviet Republic are pointed out, namely, low starting conditions (in 1923, the energy consumption per capita in Russia was 100 times lower than that in Norway), its being state-owned in nature and revolutionary in its purpose: to get done with the main upheavals in the country and to shift the national economy for fore efficient production. The role of V.I. Lenin and G.M. Krzhizhanovsky, who were the initiators of the electrification of Russia, is analyzed in detail. A conclusion is drawn about the need to study both the GOELRO Plan itself and the specific features and circumstances of its implementation within the framework of training modern specialists in electrical engineering.


2016 ◽  
Vol 9 (15) ◽  
Author(s):  
Nadiehezka Paola Palencia Tejedor

This work focuses on a compared analysis of the South Afri- can decision related to the “peace and reconciliation act” of this country’s Parliament, and the Colombian decision regarding the amendment of the constitution called “The juridical framework for the peace.” Turning to the structure, it is developed in three major topics: 1. It provides a brief of the historical context, political background and an overview of the two decisions.2. It gives a structural analysis of the powers that each Court has and the nature of the constitutional mechanism through which both Courts decided the constitutionality of the said norms 3. It presents a critical analysis on the similarities and differences between the two systems and judgments. It presents some con- clusions. 


2018 ◽  
Vol 79 (9) ◽  
pp. 61-66
Author(s):  
N. V. Khalikovа

The article considers the functions of the system of verbal imagery’s in the creation of the scientific style of V.V. Vinogradov. The figurativeness of basic, background and metaphorical terms is described. The semantic structure of the image of the basic term «style» is analyzed, figurative paradigms of the concepts Language, Speech and Style are revealed. The article shows the relationship between scientific thinking and metaphorical style, the role of sustainable cognitive metaphors in the creation, storage and transfer of pragmatic information and the creation of a cultural and historical context.


2015 ◽  
Vol 2 (4) ◽  
Author(s):  
Peter Wade

<p class="p1"><span class="s1"><strong>Resumen </strong></span>| En este trabajo quiero presentar una cronología convencional del concepto raza que marca un movimiento en el cual raza cambia de ser una idea basada en la cultura y el medio ambiente, a ser algo biológico, inflexible y determinante, para luego volver a ser una noción que habla de la cultura<span class="s2"><strong>.</strong></span>Resumo cómo la idea de raza ha cambiado a través del tiempo, mirando necesariamente el rol que ha desempeñado la ciencia, y enfocando los diferentes discursos de índole <em>natural-cultural </em>sobre los cuerpos, el medio ambiente y el comportamiento, en los cuales las dimensiones culturales y naturales siempre coexisten<span class="s2"><strong>.</strong></span>“La naturaleza” no puede ser entendida solamente como “la biología” y ni la naturaleza ni la biología necesariamente implican sólo el determinismo, la fijeza y la inmutabilidad Estar abiertos a la coexistencia de la cultura y la naturaleza y a la mutabilidad de la naturaleza nos permite ver mejor el ámbito de acción del pensamiento racial.</p><p class="p1"><strong><em>Race, Science and Society</em></strong></p><p class="p1"> </p><p class="p2"><span class="s1"><strong>Abstract </strong></span>| In this article I present and critique a standard chronology of race as, first, a concept rooted in culture and environment, and later in human biology and determinism, and finally back to culture alone<span class="s2"><strong><em>.</em></strong></span>I will outline changing understandings of race over time, with some attention to the role of science, broadly understood, and on the continuing but changing character of race as a natural-cultural discourse about organic bodies, environments and behavior, in which both cultural and natural dimensions always co-exist<span class="s2"><strong><em>.</em></strong></span>“Nature” is not to be understood simply as “biology,” and neither nature nor biology necessarily imply the fixity and determination that they are often assumed nowadays to involve<span class="s2"><strong><em>.</em></strong></span>Being open to the co-existence of culture and nature and the mutability of the latter allows us to better comprehend the whole range of action of racial thinking.</p>


Author(s):  
Tim Henning

This brief chapter summarizes central findings regarding the role of parenthetical sentences in practical discourse. But it also provides historical context. It suggests that a precursor of parentheticalism may be found in Kant, especially in Kant’s views about the “I think,” especially as they are expressed in the B-Version of the “Transcendental Deduction” and the B-Version of the chapter on Paralogisms in the Critique of Pure Reason.


Author(s):  
Xavier Tubau

This chapter sets Erasmus’s ideas on morality and the responsibility of rulers with regard to war in their historical context, showing their coherence and consistency with the rest of his philosophy. First, there is an analysis of Erasmus’s criticisms of the moral and legal justifications of war at the time, which were based on the just war theory elaborated by canon lawyers. This is followed by an examination of his ideas about the moral order in which the ruler should be educated and political power be exercised, with the role of arbitration as the way to resolve conflicts between rulers. As these two closely related questions are developed, the chapter shows that the moral formation of rulers, grounded in Christ’s message and the virtue politics of fifteenth-century Italian humanism, is the keystone of the moral world order that Erasmus proposes for his contemporaries.


Author(s):  
Elliot Friedman ◽  
Beth LeBreton ◽  
Lindsay Fuzzell ◽  
Elizabeth Wehrpsann

By many estimates the majority of adults over age 65 have two or more chronic medical conditions (multimorbidity) and are consequently at increased risk of adverse functional outcomes. Nonetheless, many older adults with multimorbidity are able to maintain high levels of function and retain good quality of life. Research presented here is designed to understand the influences that help ensure better functional outcomes in these older adults. This chapter presents findings that draw on data from the Midlife in the United States study. The independent and interactive contributions of diverse factors to multimorbidity and changes in multimorbidity over time are reviewed. The degree that multimorbidity increases risk of cognitive impairment and disability is examined. The role of inflammation as a mediator is considered. Multimorbidity is increasingly the norm for older adults, so better understanding of factors contributing to variability in multimorbidity-related outcomes can lead to improved quality of life.


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