scholarly journals Tocopherols and Tocotrienols—Bioactive Dietary Compounds; What Is Certain, What Is Doubt?

2021 ◽  
Vol 22 (12) ◽  
pp. 6222
Author(s):  
Kacper Szewczyk ◽  
Aleksandra Chojnacka ◽  
Magdalena Górnicka

Tocopherols and tocotrienols are natural compounds of plant origin, available in the nature. They are supplied in various amounts in a diet, mainly from vegetable oils, some oilseeds, and nuts. The main forms in the diet are α- and γ-tocopherol, due to the highest content in food products. Nevertheless, α-tocopherol is the main form of vitamin E with the highest tissue concentration. The α- forms of both tocopherols and tocotrienols are considered as the most metabolically active. Currently, research results indicate also a greater antioxidant potential of tocotrienols than tocopherols. Moreover, the biological role of vitamin E metabolites have received increasing interest. The aim of this review is to update the knowledge of tocopherol and tocotrienol bioactivity, with a particular focus on their bioavailability, distribution, and metabolism determinants in humans. Almost one hundred years after the start of research on α-tocopherol, its biological properties are still under investigation. For several decades, researchers’ interest in the biological importance of other forms of vitamin E has also been growing. Some of the functions, for instance the antioxidant functions of α- and γ-tocopherols, have been confirmed in humans, while others, such as the relationship with metabolic disorders, are still under investigation. Some studies, which analyzed the biological role and mechanisms of tocopherols and tocotrienols over the past few years described new and even unexpected cellular and molecular properties that will be the subject of future research.

1987 ◽  
Vol 53 (4) ◽  
pp. 295-299 ◽  
Author(s):  
Marleen Pugach ◽  
Mara Sapon-Shevin

The calls for educational reform that have dominated the professional and lay literature for the past few years have been decidedly silent in discussing the role of special education either as a contributor or a solution to the problems being raised. As an introduction to this “Special Focus” on the relationship between general educational reform and special education, this article summarizes some of the more prominent reports with regard to their treatment (and nontreatment) of special education. The impact of proposed reforms for the conceptualization and operation of special education is the subject of the five articles that follow.


2020 ◽  
Vol 6 (4) ◽  
pp. 323-338
Author(s):  
Liina Häyrinen ◽  
Sari Pynnönen

Abstract Purpose of Review The review examines recent scientific discussion on the concepts and measurements of human connection to nature (CTN) and pro-environmental behaviour (PEB). In addition to that, we explore the environmental contexts in which study populations are exposed to nature or nature experiences, particularly the contexts in which forests emerge from these studies, and lastly outline gaps in research. Recent Findings Outlining the association between CTN and PEB has been widely researched over the past 5 years. The concepts and measurements referring to these terms vary, but a few commonly used concepts were identified. The review classifies the approaches used for exploring the relationship between CTN and PEB into four categories. The review indicates that the interconnection between CTN and PEB is mostly studied as a part of the wider concept. Approximately half of the reviewed articles explored the actual exposure to some natural environment or nature activity either directly or indirectly. Forests only played a small role as a natural environment in the reviewed articles. Summary Forests appear to be of very little weight or under-represented in CTN and PEB literature as an explicitly identified natural environment. Results also indicate that the human-forest relationship has not been defined precisely in empirically based scientific literature. The paper discusses implications for the future research focusing on emphasizing the role of forests as natural environments in the research of CTN and PEB.


1998 ◽  
Vol 18 ◽  
pp. 3-19 ◽  
Author(s):  
Tony Lynch

Research into listening over the past three decades has, above all, highlighted the fundamental intricacy of the processes involved. In order to make sense of spoken messages, listeners may need to integrate information from a range of sources: phonetic, phonological, prosodic, lexical, syntactic, semantic, and pragmatic. The fact that we achieve all this in real time as the message unfolds makes listening “complex, dynamic, and fragile” (Celce-Murcia 1995:366). In this review I consider research into four aspects of these complexities: processes (e.g., speech recognition, discourse comprehension, and memory); the role of context; factors influencing listening; and the relationship of listening with other language skills. Finally I suggest likely directions for future research into listening.


2015 ◽  
Vol 2015 ◽  
pp. 174-181
Author(s):  
Natalie Zervou

Since 2009, the financial crisis in Greece has brought about a need to revisit the past and challenge previous historical assumptions in order to understand the socio-political present more effectively. Dance, and performing arts in general, have reflected this urge by giving voice to marginalized events and perspectives in Greek history, and by challenging the dominant rhetoric of ancient Greek lineage and continuity that often overlooked the significance of ethnic minorities. As such, the focus has shifted away from a sense of unity toward a fragmented understanding of Greek identity that is re-envisioning history and documenting the present by taking into consideration under-represented communities, such as ethnic minorities and immigrants.Drawing on a series of collaborative video-dance projects by Despina Stamos and Jill Woodward (passTRESpass and Bodies of Resilience), which engage with the subject position of immigrants in Greece during the crisis, this paper examines the relationship between marginality and dominant national histories, as well as the role of dance in (re)writing these “margins” and rendering them visible. Especially at a time when extreme nationalism and racism are on the rise in Greece, can dance provide the subjects of discrimination with agency, and create a space for them to “speak” against racist violence? How are these immigrants’ embodied histories in dialogue with the current rewriting of Greek identity and history?


2019 ◽  
pp. 152483801986909 ◽  
Author(s):  
Cirenia Quintana-Orts ◽  
Lourdes Rey ◽  
Everett L. Worthington

The study of bullying in adolescence has received increased attention over the past several decades. A growing body of research highlights the role of forgiveness and its association with aggression. In this article, we systematically review published studies on the association among online and traditional bullying and forgiveness in adolescents. Systematic searches were conducted in PsycINFO, MEDLINE, PsycArticles, and Scopus databases. From a total of 1,093 studies, 637 were nonduplicated studies and 18 were eventually included. Together, these studies provided evidence that forgiveness and bullying behaviors are negatively related: Adolescents with higher forgiveness levels bully less. Similarly, forgiveness is negatively related to victimization: Adolescents with higher forgiveness show less victimization. Unforgiveness was positively related to traditional and online bullying. This relationship appears to be consistent beyond types of bullying, certain background characteristics, and forgiveness measures. These findings are discussed, and clinical implications and guidelines for future research are presented.


2021 ◽  
pp. 47-57
Author(s):  
Susan L. Slocum

Abstract This chapter presents an ethnographic study of female vendors at a Texas Renaissance festival. Ethnography provides a lens through which the systematic study of the people and cultures is undertaken from the point of view of the subject of the study. The author lived and worked with these women for 8 weeks and conducted 12 interviews during that time frame. While not all interviews included women, this chapter presents the subset of data related to gender identities, business responsibilities, and diverse cultural norms of the women operating within the Renaissance festival community. The goal of this chapter is to deconstruct the complex relationship between women as modern agents and the perceptions of historical narratives of a woman's place in community and business. As a first step in understanding female vendors, negotiated identity, and the social constructions that fuel event participation, this chapter encourages future research into the relationship between event success and vendor relationships, as well as the role of women as entrepreneurs and actors on the event stage.


1987 ◽  
Vol 21 (1) ◽  
pp. 94-101 ◽  
Author(s):  
Kathryn Peace ◽  
Graham Mellsop

Over the past 50 years the relationship between alcoholism and psychiatric disorders, such as depression, anxiety and schizophrenia, has been the subject of a great deal of research. Psychiatric problems have been seen as both a cause and a result of alcoholism. Whatever the relation between alcoholism and psychiatric disorder is, it may have significance for the development of differentially effective treatment strategies. Several authors have argued that the presence and nature of psychiatric symptoms should form the basis of a classification system for alcoholics. Given the potential rewards of such a system for both understanding the aetiology of alcoholism and developing effective treatment strategies, it is important to have a clear picture of the nature and extent of this relationship. This paper reviews critically the published studies of the association between alcoholism and psychiatric disorder and outlines directions for future research.


Author(s):  
Rafal Shakir Salloom ◽  
Prof. Dr. Manal Jabbar Sorour

The world is moving towards greening business in general and production systems in particular. At the same time, economic units seek to enhance their productivity and find any variables that can contribute to improving their elements. Economic units should not ignore the green dimension of cost management techniques because of its role in containing the green dimension of the production system and the product. However the few researches dealt with the subject of the green kaizen showed its role in reducing costs and improving the environment. Those researches did not address its contribution to raising the level of productivity. Productivity is an important indicator of economic units that expresses their level of success and progress, and they need new dimensions such as the green dimension to raise their levels. Here the research shows that Green Kaizen works to reduce the amount of waste, reduce costs, and improve the environmental aspects of the production system, which enhances the system's input of materials and energies and increases good output. The research aims to present the theoretical dimensions of the variables, link them in an analytical method, and explain the relationship between them. The research provides an opportunity for future research to apply green kaizen in many industrial or service fields and to use other tools to support continuous environmental improvements.


1997 ◽  
Vol 29 (3) ◽  
pp. 359-376 ◽  
Author(s):  
Nathan J. Brown

The Islamic shariʿa is central to Islam in the minds of most Muslims and non-Muslim scholars. In many ways, the centrality of the Islamic shariʿa has increased in recent decades. Yet despite—or perhaps because of—this centrality, the precise, even the general, role of the shariʿa in Islamic societies is the subject of contentious debate among Muslims. Outside of and underlying such debates are more subtle and rarely articulated differences about the meaning of the Islamic shariʿa. In this essay, I will put forward a general intellectual map for those varying meanings. More critically, I will suggest that important shifts in the meaning of the Islamic shariʿa have taken place in the Muslim world, and that these shifts are closely connected to the nature and viability of legal and educational institutions associated with the Islamic shariʿa in the past. As the Islamic shariʿa has become disconnected from these institutions, its meaning has changed in some fundamental ways. Most important, the shariʿa is approached less for its process than for its content. And because the shift in institutions and understanding has received much less attention from Muslims, widespread attempts to re-create older relationships (particularly involving the relationship between the Islamic shariʿa and the state) in fact involve a deepening rather than a counteracting of the transformation in the Islamic shariʿa.


2009 ◽  
Vol 40 ◽  
pp. 71-84
Author(s):  
Regina Pörtner

If proverbial wisdom predicts longevity to the falsely proclaimed dead, then the paradigm of absolutism and its confessional variant must surely be considered a prime example. Having drawn intense fire from scholars of Western Europe over the past two decades, the concept of absolutism has recently been given a fresh lease of life by research, exploring and, to some extent, vindicating its applicability in the context of seventeenth- and eighteenth-century Central Europe. Given the evolutionary nature of the making of the early modern Austrian-Habsburg monarchy, the complexity of its constitutional, religious, and ethnic makeup, and the waywardness of some of its governing personnel, it seems doubtful if future research will ever be able to satisfactorily clarify the relationship between the political aspirations of individual Austrian rulers, among whom Ferdinand II arguably made the most serious bid for absolute rule, and the practice of negotiated power that characterized the normal state of relations between the Crown and the monarchy's estates.


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