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)

The quantum mechanical description of the evolution of an unstable system defined initially as a state in a Hilbert space at a given time does not provide a semigroup (exponential) decay, law. The Wigner–Weisskopf survival amplitude, describing reversible quantum transitions, may be dominated by exponential type decay in pole approximation at times not too short or too long, but, in the two channel case, for example, the pole residues are not orthogonal, and the evolution does riot correspond to a semigroup (...) (experiments on the decay of the neutral K-meson system strongly support the semigroup evolution postulated, by Lee, Oehme and Yang, and Yang and Wu). The scattering theory of Lax and Phillips, originally developed for classical wave equations, has been recently extended to the description of the evolution of resonant states in the framework of quantum theory. The resulting evolution law of the unstable system is that of a semigroup, and the resonant state is a well-defined function in the Lax–Phillips Hilbert space. In this paper we apply this theory to a relativistically covariant quantum field theoretical form of the (soluble) Lee model. We construct the translation representations with the help of the wave operators, and show that the resulting Lax–Phillips S-matrix is an inner function (the Lax–Phillips theory is essentially a theory of translation invariant subspaces). In the special case that the S-matrix is a rational inner function, we obtain the resonant state explicitly and analyze its particle (V, N, θ) content. If there is an exponential bound, the general case differs only by a so-called trivial inner factor, which does not change the complex spectrum, but may affect the wave function of the resonant state. (shrink)

After a brief historical survey, the doctrines of dharma and karma are discussed and key elements that appear in contrasting forms in the two religions are examined. Originally published in 1963.

CHAPTER I THE FRAMEWORK OF SELF-PERFECTION 1. Buddhism and Ethics Anyone who has read even a very little in the early Buddhist Scriptures is aware that from ...

A technical but lucid and relatively elementary discussion of the development of the physical concepts of space and time and the bearing of the parity hypothesis of Lee and Yang on the future course of this development.--L. K. B.

In this article we review the emerging literature on the self-transcendent emotions. We discuss how the self-transcendent emotions differ from other positive emotions and outline the defining features of this category. We then provide an analysis of three specific self-transcendent emotions—compassion, gratitude, and awe—detailing what has been learned about their expressive behavior, physiology, and likely evolutionary origins. We propose that these emotions emerged to help humans solve unique problems related to caretaking, cooperation, and group coordination in social interactions. In our (...) final section we offer predictions about the self-transcendent emotions that can guide future research. (shrink)

Can art, religion, or philosophy afford ineffable insights? If so, what are they? The idea of ineffability has puzzled philosophers from Laozi to Wittgenstein. In Ineffability and its Metaphysics: The Unspeakable in Art, Religion and Philosophy, Silvia Jonas examines different ways of thinking about what ineffable insights might involve metaphysically, and shows which of these are in fact incoherent. Jonas discusses the concepts of ineffable properties and objects, ineffable propositions, ineffable content, and ineffable knowledge, examining the metaphysical pitfalls involved in (...) these concepts. Ultimately, she defends the idea that ineffable insights as found in aesthetic, religious, and philosophical contexts are best understood in terms of self-acquaintance, a particular kind of non-propositional knowledge. Ineffability as a philosophical topic is as old as the history of philosophy itself, but contributions to the exploration of ineffability have been sparse. The theory developed by Jonas makes the concept tangible and usable in many different philosophical contexts. (shrink)

Objectives The objective of this research was to develop ethics accreditation standards for hospitals. Research design Our research methods included a literature review, an expert focus group, the Delphi technique and a hospital survey. The entire process was separated into two stages: (1) the development of a draft of hospital ethics accreditation standards; and (2) conducting a nationwide hospital survey of the proposed standards. Results This study produced a tentative draft of hospital ethics accreditation standards comprised of six chapters and (...) 62 standards based on the expert focus group and Delphi technique. The six chapters are: Medical ethics policies, regulations and leadership; The establishment and operation of a medical ethics committee; The establishment and operation of research-related ethics committees; Medical ethics education; Organisational ethical climate; and Respect for patients' rights and establishment of good hospital-patient relationships. The hospital survey indicated that the concept of an organisational ethical climate was new to most hospital managers, most hospitals disliked the idea of having a separate hospital ethics accreditation system, and small hospitals were concerned about their ability to comply with all of the standards. Conclusions Regardless of whether hospital ethics accreditation can be a stand-alone accreditation or just part of existing hospital accreditation programmes, we hope this draft can serve as a good reference for future endeavours by hospital accreditation authorities. (shrink)

This paper uses van Leeuwen’s Authority Legitimation framework to examine government posters published in the 1950s–1980s in Hong Kong, which serve as a means of shaping public opinion and legitimate social action. Martin and White’s Appraisal framework is also applied to provide the study with relevant analytical tools by which to construct evaluatively coherent authorial reading positions propagated by the government in the posters as well as aligning viewers with these desired positions. The government posters being studied are concerned with (...) various aspects of social practices in the domain of public health communication. This paper argues that the representations of these social practices are realized as texts – both visual and verbal – in the posters, as part of a broader recontextualization process where legitimate ways of doing things as stipulated in the government guidelines are recontextualized in these posters and conveyed to members of the public. The aim is two-fold: to provide a systematic analysis of how visual and verbal resources construe evaluation in the government posters and the consequent legitimation discourse as viewers are being persuaded to align with legitimate social practices; to highlight various forms of legitimation, namely, role model authority legitimation, impersonal authority legitimation, and conformity authority legitimation, that are realized in these posters through visual-verbal articulation. (shrink)

Experiences of discrimination such as everyday racism can negatively affect the mental and physical health of children and adolescents with an immigrant background and impair their integration process in the host societies. Although experiences of racism are part of the everyday life of many minors affected by the process of “Othering”, an overview of empirical findings is missing for this age group worldwide. A systematic review was conducted to identify and analyze international research on the impact of discrimination on the (...) developmental outcomes and integration of immigrant children and adolescents. Three scientific databases were systematically searched up to June 11, 2021. A total of k = 4,769 identified publications were reviewed based on inclusion and exclusion criteria in terms of the PICOS format by independent reviewers. Thirty-four primary studies published between 1998 and 2021 met all inclusion criteria. The samples examined were mainly migrant youth, with only k = 2 studies assessing refugee youth and k = 1 study assessing both migrant and refugee youth. The majority of included studies assessed perceived discrimination, with only k = 1 study directly assessing experiences of racism. The association between discrimination or racism and developmental outcomes was assessed by the included studies within the three main topics of mental and physical health-related outcomes, school-related outcomes, and other developmental outcomes. Data collection procedures were implemented, and findings on minors’ developmental outcomes and integration process who experience discrimination and racism were summarized and discussed. The current review suggests experienced discrimination as a negative predictor of children and adolescents’ health-related outcomes, while no clear results could be found for the association between discrimination and school-related outcomes. A need for more empirical research focusing on the path and indirect link between discrimination and children and adolescents’ school-related outcomes as well as resulting school recommendations and the chosen career path was derived.Systematic Review Registration[https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=260291], identifier [CRD42021260291]. (shrink)

ABSTRACTDespite interest in exercise as a treatment for anxiety disorders the mechanism behind the anxiolytic effects of exercise is unclear. Two observations motivate the present work. First, engagement of attention control during increased working memory load can decrease anxiety. Second, exercise can improve attention control. Therefore, exercise could boost the anxiolytic effects of increased WM load via its strengthening of attention control. Anxiety was induced by threat of shock and was quantified with anxiety-potentiated startle. Thirty-five healthy volunteers participated in two (...) types of activity, exercise and control-activity. After each activity, participants completed a WM task at low- and high-load during safe and threat. Results were not consistent with the hypothesis: exercise vs. control-activity increased APS in high-load. However, this incre... (shrink)

: Three major strategies exist for the protection of endangered habitat and species: (1) land acquisition programs, (2) government legislation and regulatory agencies, and (3) "stewardship" programs that are voluntary and community-based. While all of these strategies have merit, we suggest that stewardship holds particular advantages and should be considered more often as a strategy of first choice. In this article, we examine the Municipal Wetland Stewardship program of Newfoundland, a popular and successful Canadian policy for the local protection of (...) wetlands. Important issues are at stake: competing philosophical foundations for managerial ecology, the value of "local ecological knowledge," principles of community-based conservation, the question of whether stewardship empowers local communities or controls them from afar, and ethical conflicts around American colonialism, hunting, and ecotourism. The results suggest that despite some potentially problematic ironies, the Newfoundland program provides a model for a public policy aimed both at the pragmatics of biophysical sustainability and at the ideals of environmental ethics, social justice, and democratic politics. (shrink)

Three major strategies exist for the protection of endangered habitat and species: (1) land acquisition programs, (2) government legislation and regulatory agencies, and (3) "stewardship" programs that are voluntary and community-based. While all of these strategies have merit, we suggest that stewardship holds particular advantages and should be considered more often as a strategy of first choice. In this article, we examine the Municipal Wetland Stewardship program of Newfoundland, a popular and successful Canadian policy for the local protection of wetlands. (...) Important issues are at stake: competing philosophical foundations for managerial ecology, the value of "local ecological knowledge," principles of community-based conservation, the question of whether stewardship empowers local communities or controls them from afar, and ethical conflicts around American colonialism, hunting, and ecotourism. The results suggest that despite some potentially problematic ironies, the Newfoundland program provides a model for a public policy aimed both at the pragmatics of biophysical sustainability and at the ideals of environmental ethics, social justice, and democratic politics. (shrink)