Monoazo (Monohydrazone) pigments based on benzimidazolones

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Robert Christie ◽  
Adrian Abel
Keyword(s):  
High Performance ◽  
Coupling Reaction ◽  
Intermolecular Hydrogen Bonds ◽  
Organic Pigments ◽  
Tautomeric Forms ◽  
Structure Determinations ◽  
Yellow Orange ◽  
Late Twentieth ◽  
Paint Industry ◽  
Late Twentieth Century

Abstract A series of azo pigments containing the benzimidazolone ring were introduced in the mid to late twentieth century as high-performance organic pigments in the yellow, orange, red, and brown shade areas. The structures of the commercial benzimidazolone azo pigments are derived from either the monoazoacetoacetanilide or monoazonaphtharylamide classical azo pigments systems and exist in the ketohydrazone tautomeric forms. The high-performance properties of the pigments have been attributed to a network of intermolecular hydrogen bonds involving the benzimidazolone group, and efficient molecular packing, as demonstrated by X-ray crystal structure determinations. The manufacturing processes leading to the pigments involve traditional diazotization and azo coupling reaction procedures, although they require special conditioning aftertreatments to optimize their performance. Although benzimidazolone azo pigments were initially developed for the coloration of plastics, they have probably had a greater impact on the paint industry. The application properties of the benzimidazolone azo pigments are discussed for individual products.

Nine Centuries of Man

2017 ◽  
Keyword(s):  
Twentieth Century ◽  
Diverse Range ◽  
Gender Expectations ◽  
Court Records ◽  
The Past ◽  
Wide Range ◽  
Police Reports ◽  
Late Twentieth ◽  
Scottish History ◽  
Late Twentieth Century

What did it mean to be a man in Scotland over the past nine centuries? Scotland, with its stereotypes of the kilted warrior and the industrial ‘hard man’, has long been characterised in masculine terms, but there has been little historical exploration of masculinity in a wider context. This interdisciplinary collection examines a diverse range of the multiple and changing forms of masculinities from the late eleventh to the late twentieth century, exploring the ways in which Scottish society through the ages defined expectations for men and their behaviour. How men reacted to those expectations is examined through sources such as documentary materials, medieval seals, romances, poetry, begging letters, police reports and court records, charity records, oral histories and personal correspondence. Focusing upon the wide range of activities and roles undertaken by men – work, fatherhood and play, violence and war, sex and commerce – the book also illustrates the range of masculinities that affected or were internalised by men. Together, the chapters illustrate some of the ways Scotland’s gender expectations have changed over the centuries and how, more generally, masculinities have informed the path of Scottish history

Trey Ellis's Platitudes: Redefining Black Voices

2009 ◽  
Vol 32 (1) ◽  
pp. 55-76
Author(s):  
Quan Manh Ha
Keyword(s):  
Twentieth Century ◽  
African American ◽  
American Literature ◽  
African American Literature ◽  
Black Experience ◽  
Racial Issues ◽  
Black Voices ◽  
Late Twentieth ◽  
One Year ◽  
Late Twentieth Century

Trey Ellis has emerged as a prominent African American writer of the late-twentieth century, despite the small number of his published works. “The New Black Aesthetic,” an essay that he first published in CaUaloo in 1989, one year after the publication of his first novel, Platitudes, stands as a manifesto that defines and articulates his perspective on the emerging black literary voices and culture of the time, and on “the future of African American artistic expression” in the postmodern era.1 According to Eric Lott, Ellis's novel parodies the literary and cultural conflict between such male experimental writers as lshmael Reed and such female realist writers as Alice Walker.2 Thus, Ellis's primary purpose in writing Platitudes is to redefine how African Americans should be represented in fiction, implying that neither of the dominant approaches can completely articulate late-twentieth-century black experience when practiced in isolation. In its final passages, Platitudes represents a synthesis of the two literary modes or styles, and it embodies quite fully the diversity of black cultural identities at the end of the twentieth century as it extends African American literature beyond racial issues. In this way, the novel exemplifies the literary agenda that Ellis suggests in his theoretical essay.

A New Denominational Historiography?

1995 ◽  
Vol 5 (2) ◽  
pp. 249-263
Author(s):  
John F. Wilson
Keyword(s):  
Twentieth Century ◽  
Recent Analysis ◽  
General Factor ◽  
Religious Organization ◽  
Religious Institution ◽  
Large Numbers ◽  
The Status ◽  
Late Twentieth ◽  
American Society ◽  
Late Twentieth Century

Over the last decade, a noteworthy number of published studies have, in one fashion or another, been defined with reference to religious denominations. This is an arresting fact, for, coincidentally, the status of religious denominations in the society has been called into question. Some formerly powerful bodies have lost membership (at least relatively speaking) and now experience reduced influence, while newer forms of religious organization(s)—e.g., parachurch groups and loosely structured movements—have flourished. The most compelling recent analysis of religion in modern American society gives relatively little attention to them. Why, then, have publications in large numbers appeared, in scale almost seeming to be correlated inversely to this trend?No single answer to this question is adequate. Surely one general factor is that historians often “work out of phase” with contemporary social change. If denominations have been displaced as a form of religious institution in society in the late twentieth century, then their prominence in earlier eras is all the more intriguing.

Chakras and Endocrine Glands

2010 ◽  
Vol 39 (2) ◽  
pp. 21-25
Author(s):  
Andrea Jain
Keyword(s):  
Well Being ◽  
Scientific Discourse ◽  
Body Parts ◽  
Endocrine Glands ◽  
Subtle Body ◽  
Modern Yoga ◽  
Unique System ◽  
Late Twentieth ◽  
Late Twentieth Century

This paper is an exploration of preksha dhyana as a case study of modern yoga. Preksha is a system of yoga and meditation introduced by Acarya Mahaprajna of the Jain Svetambara Terapanth in the late twentieth century. I argue that preksha is an attempt to join the newly emerging transnational yoga market whereby yoga has become a practice oriented around the attainment of physical health and psychological well-being. I will evaluate the ways in which Mahaprajna appropriates scientific discourse and in so doing constructs a new and unique system of Jain modern yoga. In particular, I evaluate the appropriation of physical and meditative techniques from ancient yoga systems in addition to the explanation of yoga metaphysics by means of biomedical discourse. I will demonstrate how, in Mahaprajna’s preksha system, the metaphysical subtle body becomes somaticized. In other words, Mahaprajna uses the bio-medical understanding of physiology to locate and identify the functions of metaphysical subtle body parts and processes in the physiological body.

Archaeology, Historicity, and Homosexuality in the New Cultus of Antinous

2018 ◽  
Vol 8 (2) ◽  
pp. 237-259
Author(s):  
Ethan White
Keyword(s):  
Twentieth Century ◽  
Gay Men ◽  
Second Century ◽  
Roman Emperor ◽  
Late Twentieth ◽  
Late Twentieth Century

In the second century, the Roman Emperor Hadrian deified his male lover, Antinous, after the latter drowned in the Nile. Antinous’ worship was revived in the late twentieth century, primarily by gay men and other queer-identified individuals, with Antinous himself being recast as “the Gay God.”

URBAN DISPLACEMENT AND LOW-INCOME COMMUNITIES: THE CASE OF THE AMERICAN CITY FROM THE LATE TWENTIETH CENTURY

2016 ◽  
Vol 10 (2) ◽  
pp. 06 ◽  
Author(s):  
Jason Knight ◽  
Mohammad Gharipour
Keyword(s):  
Urban Communities ◽  
Low Income ◽  
Urban Redevelopment ◽  
Minority Populations ◽  
The People ◽  
History Of ◽  
Late Twentieth ◽  
Cultural Connections ◽  
American Cities ◽  
Late Twentieth Century

How can urban redevelopment benefit existing low-income communities? The history of urban redevelopment is one of disruption of poor communities. Renewal historically offered benefits to the place while pushing out the people. In some cases, displacement is intentional, in others it is unintentional. Often, it is the byproduct of the quest for profits. Regardless of motives, traditional communities, defined by cultural connections, are often disrupted. Disadvantaged neighborhoods include vacant units, which diminish the community and hold back investment. In the postwar period, American cities entered into a program of urban renewal. While this program cleared blight, it also drove displacement among the cities’ poorest and was particularly hard on minority populations clustered in downtown slums. The consequences of these decisions continue to play out today. Concentration of poverty is increasing and American cities are becoming more segregated. As neighborhoods improve, poorer residents are uprooted and forced into even more distressed conditions, elsewhere. This paper examines the history of events impacting urban communities. It further reviews the successes and failures of efforts to benefit low-income communities.

Effects of GMO agricultural products on living things

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
ERCAN ÇATAK ◽  
Ali ATALAY
Keyword(s):  
Genetically Modified Organisms ◽  
World Population ◽  
Negative Effects ◽  
Qualitative And Quantitative ◽  
Living Things ◽  
Late Twentieth ◽  
Agricultural Use ◽  
Late Twentieth Century ◽  
Living Creature

By obtaining changes on gene sequences of living things with the applied biotechnological methods; The idea of "Genetically Modified Organisms (GMO)", which aims to bring the living creature in question the original gene combinations with the desired characteristics, came to life in the late twentieth century. Despite the high probability that hunger problems may increase with the increasing world population; It is thought that plant breeding with classical farming methods will be insufficient in solving these problems. With various GMO applications developed all over the world, it aims to produce solutions to these problems. With the presence of GMO, it was possible to increase the shelf life of qualitative and quantitative values of the existing foods. In addition, decreases in agricultural use of pesticides used in agricultural struggle and threatening human health with GMO production are noteworthy. However, some concerns about anomalies that may occur in living things fed GMO products remain on the agenda. Because, in the long term, there is no clear and precise information that GMO will not have negative effects on living things; There are many recorded incidents showing their negative effects.

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