Arbuscular mycorrhizal fungi are considered as a potential biotechnological tool for improving phytostabilization efficiency and plant tolerance to heavy metal-contaminated soils. However, the mechanisms through which AMF help to alleviate metal toxicity in plants are still poorly understood. A greenhouse experiment was conducted to evaluate the effects of two AMF species on the growth, Pb accumulation, photosynthesis and antioxidant enzyme activities of a leguminous tree at Pb addition levels of 0, 500, 1000 and 2000 mg kg-1 soil. AMF symbiosis decreased (...) Pb concentrations in the leaves and promoted the accumulation of biomass as well as photosynthetic pigment contents. Mycorrhizal plants had higher gas exchange capacity, non-photochemistry efficiency, and photochemistry efficiency compared with non-mycorrhizal plants. The enzymatic activities of superoxide dismutase, ascorbate peroxidases and glutathione peroxidase were enhanced, and hydrogen peroxide and malondialdehyde contents were reduced in mycorrhizal plants. These findings suggested that AMF symbiosis could protect plants by alleviating cellular oxidative damage in response to Pb stress. Furthermore, mycorrhizal dependency on plants increased with increasing Pb stress levels, indicating that AMF inoculation likely played a more important role in plant Pb tolerance in heavily contaminated soils. Overall, both F. mosseae and R. intraradices were able to maintain efficient symbiosis with R. pseudoacacia in Pb polluted soils. AMF symbiosis can improve photosynthesis and reactive oxygen species scavenging capabilities and decrease Pb concentrations in leaves to alleviate Pb toxicity in R. pseudoacacia. Our results suggest that the application of the two AMF species associated with R. pseudoacacia could be a promising strategy for enhancing the phytostabilization efficiency of Pb contaminated soils. (shrink)

El libro contiene doce lecciones dadas por el autor en la Universidad Central de Madrid en 1933. Ortega desarrolla el planteamiento de los problemas generales de la historia y de la "historiología". Analiza los acontecimientos que causaron el inicio y evolución del pensamiento moderno. La vida de Galileo, en su opinión, marca el inicio del imperio de la razón pura, que comienza con la "rebelión de las ciencias" frente al dominio precedente de la teología. Se hace un estudio del cristianismo (...) como forma de vida, su aparición, justificación histórica y desarrollo, hasta convertirse en el elemento central de la cultura occidental. El autor analiza el cristianismo al margen de la fe y de cualquier dimensión sobrenatural, lo que le lleva a tratar la religión como una más entre las teorías filosóficas existentes. Ortega considera equivocadamente que la base del cristianismo es el reconocimiento de la nulidad del hombre y de la naturaleza. La verdadera línea de desarrollo de la filosofía cristiana --marcada, según él, por Duns Scoto, Eckhart y Nicolás Cusano--, desemboca necesariamente en una completa ruptura entre la fe y la razón. La doctrina de Santo Tomás habría supuesto, en cambio, una deformación del cristianismo, un intento de "racionalizar la fe" mediante la introducción del aristotelismo en el estudio de la teología. (shrink)

The COVID-19 pandemic shocked the global economy, with numerous companies suffering losses and shutting down. However, some companies proved to be resilient, being able to sustain their economic performance despite the pandemic. The study aims to explain the sustainable economic performance of companies during the COVID-19 pandemic. The relationships between empowering leadership, innovative work behavior, organizational readiness to change, and sustainable economic performance were assessed. The data were collected via an online questionnaire from January 2021 to March 2021, during the (...) height of the COVID-19 pandemic in Russia. The respondents were Russian companies’ employees holding management positions, competent to objectively assess organizational circumstances during the COVID-19 pandemic. A sample of 337 was used in the analysis. Confirmatory factor analysis (CFA) with maximum likelihood estimation was conducted using SPSS AMOS. The structural model was tested with standardized parameter estimates, standard errors, and p-values calculated. The findings of the study suggest that innovative work behavior and organizational readiness to learn have a direct influence on sustainable economic performance. The findings also suggest that empowering leadership impacts innovative work behavior but not sustainable economic performance. The mediation analysis indicates that innovative work behavior is a mediator between empowering leadership and sustainable economic performance, whereas organizational readiness to learn is not a moderator. The study adds to the leadership and sustainability body of knowledge and contributes to the research on the COVID-19 pandemic in the organizational context. (shrink)

This paper explores the value of respect for personal autonomy in relation to clearly immoral and irrational acts committed freely and intentionally by competent people. Following Berlin's distinction between two kinds of liberty and Darwall's two kinds of respect, it is argued that coercive suppression of nonautonomous, irrational, and self-harming acts of competent persons is offensive to their human dignity, but not disrespectful of personal autonomy. Irrational and immoral choices made by competent people may claim only the negative liberty to (...) be left alone. Lives disposed to autonomy are worthy of solidarity and active support in addition to the right of free choice and action. Autonomous premeditated desires (distinguished from mere consent) may embody transcendental choices, which transcend consideration of physical and psychological well-being. Choices made by incompetent persons (e.g., children and the mentally disabled) are not related to autonomy, but to self-directedness. The value of human dignity confers protection to self-directedness, but not at the expense of other vital interests. (shrink)

Almost all languages have some ways of categorizing nouns. Languages of South-East Asia have classifiers used with numerals, while most Indo-European languages have two or three genders. They can have a similar meaning and one can develop from the other. This book provides a comprehensive and original analysis of noun categorization devices all over the world. It will interest typologists, those working in the fields of morphosyntactic variation and lexical semantics, as well as anthropologists and all other scholars interested in (...) the mechanisms of human cognition. (shrink)

Open peer commentary on the article “Enaction as a Lived Experience: Towards a Radical Neurophenomenology” by Claire Petitmengin. Upshot: Why has the neurophenomenological approach not been adopted as a common and even obligatory tool in the study of consciousness? I suggest that the problem with the neurophenomenological approach is its effectiveness on the one hand and its almost impossible demands from the scientist on the other: One cannot accept the neurophenomenological approach without rejecting not only the paradigm of cognitive science, (...) but the scientific paradigm as a whole. (shrink)

The work has aimed throughout at a comparative treatment of the problems.

Philosophical interpretation of the dilemma of modern man within the context of history.

Excerpt from Meditaciones del Quijote: Meditación Preliminar, Meditación Primera Nada que de éste provenga puede ser nos simpático. El rencor es una emana ción de la conciencia de inferioridad. Es la supresión imaginaria de quien no pode mos con nuestras propias fuerzas real mente suprimir. Lleva en nuestra fantasía aquel por quien sentimos rencor, el aspec to lívido de un cadáver; lo hemos matado, aniquilado con la intención. Y luego al ha llarlo en la realidad firme y tranquilo, nos parece (...) un muerto indócil, más fuerte que nuestros poderes, cuya existencia signi fica la burla personificada, el desdén vi viente hacia nuestra débil condición. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. (shrink)

Originally published 1961. Translation of "Meditaciones del Quijote :Meditacion preliminar. Meditacion primera." (1914). Contents: Reader...; Preliminary Meditation; First Meditation (Brief Treatise on the Novel).

Does George Berkeley provide an argument for the existence of the Judeo-Christian God at Principles of Human Knowledge, part I, section 29? The standard answer is that he does. In this paper, we challenge that interpretation. First, we look at section 29 in the context of its preceding sections and argue that the most the argument establishes is that there are at least two minds, that is, that the thesis of solipsism is false. Next, we examine the argument in section (...) 29 in light of the conclusions Berkeley draws in sections 30–33. There Berkeley concludes that there is one cause of the ordered world of ideas, a cause he calls the "Author of Nature." We argue that Berkeley's Author of Nature is conceptually distinct from, although numerically identical with, the Judeo-Christian God, for whose existence Berkeley argues in section 146. Finally, we ask whether, if our conclusion is correct, it is significant that Berkeley drew a conceptual distinction between the Author of Nature and the Judeo-Christian God. (shrink)

In its first part, the paper explores the challenge of conceptualizing the Thomist theological virtue of hope in Aristotelian terms that are compatible with non-Thomist and even atheist metaphysics as well. I argue that the key concept in this endeavor is friendship—as an Aristotelian virtue, as relational value in Thomist theology, as a recognized value in supportive care and as a kind of ‘personal hope.’ Then, the paper proceeds to examine the possible differences between hope as a virtue and hope (...) as an experience reported by people, terminal patients in particular. With the clinical problem of hope at the end of life in mind, the paper concludes with two meta-ethical questions—about the overridingness of .. (shrink)