Significant Organic Transformations Using Catalysts in Water: A Greener Way to Combat Environmental Hazards

2020 ◽  
Vol 07 ◽  
Author(s):  
Chhanda Mukhopadhyay ◽  
Rammyani Pal
Keyword(s):  
Organic Synthesis ◽  
Organic Solvents ◽  
Chemical Reactions ◽  
Environmental Hazards ◽  
First Century ◽  
Organic Transformations ◽  
Huge Number ◽  
The Past ◽  
Quantum Leap ◽  
The World

The environmental pollution and hazards have become the prime topic of concern in the twenty first century world and a warning to existing mankind. The researchers and chemists are also putting their way forward to combat the alarming situation across the world. In this context, reactions that are being carried out in water have attracted the attention from the past decade. Conventional organic synthesis relies profoundly on organic solvents for a huge number of reactions, mainly for dissolving the compounds and assisting chemical reactions, because a number of reagents and catalyst are either unsuited or immiscible in water. In spite of the constraints, substantial efforts have been dedicated to overcome the problems because water not only reduces the environmental hazards of organic synthesis, but also may benefit chemical reactions by delivering unforeseen selectivities and reactivities. The development of watercompatible/water-stable catalysts has emerged as a trouble shooter; eliciting a quantum leap in organic synthesis in water. Use of water has simplified the workup procedure too as organic compounds are typically insoluble in water, extraction with suitable organic solvents can separate the compounds from catalysts and the catalysts can also be separated and reused by centrifugation and filtration. This review deals with advances in catalytic methods under aqueous medium over the past few years.

Sustaining Vernacular Architecture - Antiochia as a Sample

2005 ◽  
Vol 30 (3) ◽  
pp. 83-93
Author(s):  
Meltem Yýlmaz
Keyword(s):  
Vernacular Architecture ◽  
Building Design ◽  
First Century ◽  
Rapid Urbanization ◽  
Climate History ◽  
The Past ◽  
Rural Economies ◽  
The World ◽  
Current Century ◽  
The Impact

Much of the world, is currently experiencing intense growth, especially in and around cities. Most conventional practitioners of modern design and construction find it easier to make buildings as if nature and place did not exist. Cars and factories might be thought as the most obvious enemies of the environment, but buildings consume more than half the energy used worldwide. Attempts to destroy building traditions have been associated in some countries with a drive to modernize. Beyond the traditional aspects of dwelling, the impact of globalization and its effect on rural economies, environmental problems, rapid urbanization and the unprecedented scale of housing problems which confront the peoples of the world in the twenty-first century, bring a new urgency to the study of the vernacular architecture in a sustaining sense. In this work, the concept of “sustainability” will be taken into consideration especially within the building scale. Vernacular architecture in the past produced a built environment which met people's needs without deteriorating the environment. This paper discusses the concept of sustainability in building design and connects it to the vernacular architecture with the search of the vernacular Antiochia houses as a sample; focusing on its architectural properties in detail. The study concludes that what is expected of architects in the current century is, wherever they work, they are to understand and digest the nature of climate, history and culture, that is to say, to obtain inspiration from the essence of place and to contribute to the creation of relevant architecture and city for a sustainable future.

Task-specific Ionic Liquids as a Green Catalysts and Solvents for Organic Synthesis

2020 ◽  
Vol 7 (1) ◽  
pp. 105-119 ◽  
Author(s):  
Swapnil A. Padvi ◽  
Dipak S. Dalal
Keyword(s):  
Ionic Liquids ◽  
Physical Properties ◽  
Organic Synthesis ◽  
Review Article ◽  
Present Review ◽  
Organic Transformations ◽  
The Past ◽  
Properties Characterization

Task-specific ionic liquids (TSILs) have received increased attention over the past few years as a Green Catalysts and Solvents for a large number of organic transformations. The present review article aims to provide an introduction, types of task-specific ionic liquids, preparation/synthesis, physical properties, characterization, use of TSILs as solvent and catalyst in organic synthesis.

Organic Synthesis

2017 ◽  
Author(s):  
Douglass F. Taber ◽  
Tristan Lambert
Keyword(s):  
Organic Synthesis ◽  
State Of The Art ◽  
Research Area ◽  
Organic Transformations ◽  
The Past ◽  
Catalytic Asymmetric Synthesis ◽  
New Methods ◽  
Recent Developments ◽  
Enantioselective Epoxidation ◽  
To Come

Organic synthesis is a vibrant and rapidly evolving field; chemists can now cyclize alkenes directly onto enones. Like the first five books in this series, Organic Synthesis: State of the Art 2013-2015 will lead readers quickly to the most important recent developments in a research area. This series offers chemists a way to stay abreast of what's new and exciting in organic synthesis. The cumulative reaction/transformation index of 2013-2015 outlines all significant new organic transformations over the past twelve years. Future volumes will continue to come out every two years. The 2013-2015 volume features the best new methods in subspecialties such as C-O, C-N and C-C ring construction, catalytic asymmetric synthesis, selective C-H functionalization, and enantioselective epoxidation. This text consolidates two years of Douglass Taber's popular weekly online column, "Organic Chemistry Highlights" as featured on the organic-chemistry.org website and also features cumulative indices of all six volumes in this series, going back twelve years.

Industrialization, Hubs, and Catch-up

2020 ◽  
pp. 145-161
Author(s):  
Deepak Nayyar
Keyword(s):  
United States ◽  
Western Europe ◽  
Industrial Revolution ◽  
The United States ◽  
First Century ◽  
Rapid Decline ◽  
The Past ◽  
Early Twenty ◽  
The World ◽  
Catch Up

This chapter analyses the striking changes in the geographical distribution of manufacturing production amongst countries and across continents since 1750, a period that spans more than two-and-a-half centuries, which could be described as the movement of industrial hubs in the world economy over time. Until around 1820, world manufacturing production was concentrated in China and India. The Industrial Revolution, followed by the advent of colonialism, led to deindustrialization in Asia and, by 1880, Britain became the world industrial hub that extended to northwestern Europe. The United States surpassed Britain in 1900, and was the dominant industrial hub in the world until 2000. During 1950 to 2000, the relative, though not absolute, importance of Western Europe diminished, and Japan emerged as a significant industrial hub, while the other new industrial hub, the USSR and Eastern Europe, was short lived. The early twenty-first century, 2000–2017, witnessed a rapid decline of the United States, Western Europe, and Japan as industrial hubs, to be replaced largely by Asia, particularly China. This process of shifting hubs, associated with industrialization in some countries and deindustrialization in other countries in the past, might be associated with premature deindustrialization in yet other countries in the future.

The Ecological Century

1982 ◽  
Vol 9 (1) ◽  
pp. 65-70 ◽  
Author(s):  
E. Barton Worthington
Keyword(s):  
Historical Perspective ◽  
Scientific Basis ◽  
Environmental Conservation ◽  
First Century ◽  
Experimental Science ◽  
Quarter Century ◽  
The Third ◽  
The Past ◽  
The World ◽  
The Tropics

The historical perspective is becoming ever more important in scientific research and development—especially in regions of rapid political and social change, such as former colonial empires, where the past is readily forgotten. Therefore this essay attempts to reconstruct the evolution of Ecology as the scientific basis for environmental conservation and human progress, as seen through the eyes of a biologist who has exercised that science during a number of tasks in various parts of the world over most of the twentieth century.From its beginnings in evolutionary thinking during the nineteenth century, ecology emerged from natural history at the beginning of the twentieth. At first the running was made by botanists; but this was soon followed by zoologists, who dealt with more mobile communities. The first quarter-century was mainly exploratory; the second was mainly descriptive (although biological exploration was still dominant in the tropics). The third quarter saw ecology developing into an experimental science, and, as the environmental revolution got into its stride, ecology became organized both nationally and internationally.Although the term is now often misused and sometimes misunderstood by laymen, the last quarter-century is seeing the wide application of ecology in environmental and human affairs, and this gives some assurance that the twenty-first century will not become one of chaos. The Author expresses the hope that experienced practising ecologists will in future give higher priority to applying what they already know than to learning more and more about less and less.

Advances of Application of Ionic Liquids in Catalytic Oxidation Reactions

2011 ◽  
Vol 233-235 ◽  
pp. 499-506 ◽  
Author(s):  
Yu Kun Shi ◽  
Guang Fei Qu ◽  
Ping Ning ◽  
Jun Zhang ◽  
Hui Feng
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Catalytic Oxidation ◽  
Organic Synthesis ◽  
Organic Solvents ◽  
Chemical Reactions ◽  
Oxidation Reaction ◽  
Oxidation Reactions ◽  
Dual Functions

Advances of application of ionic liquids as solvents and catalysts in the catalytic oxidation reaction are summarized in this paper. Ionic liquids, as solvent, can provide an environment which is different from the traditional organic solvents for the chemical reactions, and make the catalytic activity and stability better, conversion and selectivity higher; Ionic liquids, as catalyst, not only play the function of promoting reaction, but also play a solvent/catalyst dual functions more directly. Currently ionic liquids in catalytic oxidation reaction are mostly used as solvent, Especially used widely in organic synthesis. The designability of ionic liquids provides a broad space for ionic liquids as catalyst.

scholarly journals Leading Beautifully: The Creative Economy and Beyond

2018 ◽  
Vol 50 (4) ◽  
pp. 11-39
Author(s):  
Nancy J. Adler
Keyword(s):  
First Century ◽  
Creative Economy ◽  
The Past ◽  
The World ◽  
The Future ◽  
Passionate Commitment ◽  
Twenty First Century ◽  
Traditional Structures ◽  
First Time

<p align="right">Only by investing in the artistry of our humanity <br/>will we create a peaceful, prosperous planet</p> “These times are riven with anxiety and uncertainty” asserts John O’Donohue.<sup>1</sup> “In the hearts of people some natural ease has been broken. … Our trust in the future has lost its innocence. We know now that anything can happen. … The traditional structures of shelter are shaking, their foundations revealed to be no longer stone but sand. We are suddenly thrown back on ourselves. At first, it sounds completely naïve to suggest that now might be the time to invoke beauty. Yet this is exactly what … [we claim]. Why? Because there is nowhere else to turn and we are desperate; furthermore, it is because we have so disastrously neglected the Beautiful that we now find ourselves in such a terrible crisis.”<sup>2</sup> Twenty‑first century society yearns for a leadership of possibility, a leadership based more on hope, aspiration, innovation, and beauty than on the replication of historical patterns of constrained pragmatism. Luckily, such a leadership is possible today. For the first time in history, leaders can work backward from their aspirations and imagination rather than forward from the past.<sup>3</sup> “The gap between what people can imagine and what they can accomplish has never been smaller.”<sup>4</sup> Responding to the challenges and yearnings of the twenty‑first century demands anticipatory creativity. Designing options worthy of implementation calls for levels of inspiration, creativity, and a passionate commitment to beauty that, until recently, have been more the province of artists and artistic processes than the domain of most managers. The time is right for the artistic imagination of each of us to co‑create the leadership that the world most needs and deserves.

scholarly journals Changing the World Through Poetry: Confessions, Poems and Banners of Adam Borzič

Porównania ◽  
2020 ◽  
Vol 27 (2) ◽  
pp. 325-339
Author(s):  
Markéta Kittlová
Keyword(s):  
Turning Point ◽  
Social Role ◽  
First Century ◽  
Cultural Work ◽  
Avant Garde ◽  
The Past ◽  
Strong Current ◽  
The Social ◽  
The World

This study focuses on Adam Borzič, one of the most distinctive contemporary Czech poets. The study contextualises his work within current Czech poetry but also examines his other work that is not strictly classified as art as though it were cultural work with avant-garde features. It investigates four volumes of Borzič’s work in terms of the changes in the author’s creative gesture, which expands from his conviction that the world is at a turning point and the avant-garde longing to change the world by poetry. In the four volumes of Borzič’s poetry (written so far), this gesture is embodied through delicately intimate, acutely physical, or even gigantically all-embracing positions, where he employs motives of the heart, head, hand and mouth. The study attempts to evaluate the change in Borzič’s work in the lightof T. S. Eliot’s understanding of the social role of poetry and avant-garde longing to change reality through art. The Czech poet, Adam Borzič, is one of the most distinctive figures of the current Czech literary scene. His poetry is distinct because of its unique gesture andalso represents a strong current in the poetry production of the past decade with its emphasis on the social function of poetry7 and the poet’s role as somebody who should nurture the world through his/her work or even change it. This study attempts to portray Borzič’s work as focused on the mentioned topics and related issues of the end of the first decade of the twenty-first century and renew interest in them, contextualise his work within current Czech poetry but also investigate his other work, which is not strictly artistic but which possesses some avant-garde features.

scholarly journals The Scythian Stag in Contemporary Arts and Craft: Tuva and Abroad

2021 ◽  
pp. 91-106
Author(s):  
Кэтрин З. Лунг
Keyword(s):  
First Century ◽  
Arts And Crafts ◽  
Main Subject ◽  
Burial Site ◽  
The Past ◽  
The World ◽  
Wood Carving ◽  
English Speaking ◽  
Fashion Designers ◽  
Archival Work

The article examines the interest in Scythian imagery and motifs in contemporary arts and crafts, both in Tuva and outside Russia, on a surge after the excavation of Arzhan II burial site. As proved by numerous references, the most popular of the Arzhan II finds was the stylized image of the Scythian stag on a golden hair pin. It has since appeared on the photo taken by Russian photographer Andrei Bronnikov, whose main subject is jewelry. Tattoo artists in English-speaking regions have seen an uptick in customers requesting Scythian stag tattoo designs, due in large part to the discovery of the popularly dubbed “Ukok Princess” and increase in interest in prehistoric fantasy media. Russian-speaking fashion designers redefine textile and ornament in the twenty-first century, influenced by the golden accents of the looped stag in their work, at times inventing an embellished narrative of the past. Folk crafters have created costume and jewelry designs for a different world they wish to inhabit, even creating alter-egos and stories that accompany Scythian-inspired pieces. Finally, within Tuva, wood carving continues thanks to trailblazers that promote folk handicrafts through education and archival work. Artists around the world are fascinated by this unique relic of the past and employ the symbol in romantic imaginings of their past and present.

Assessing Music Learning Through Composition

2019 ◽  
pp. 610-628
Author(s):  
Clint Randles
Keyword(s):  
United States ◽  
New Media ◽  
Music Education ◽  
The United States ◽  
First Century ◽  
Music Learning ◽  
The Past ◽  
The United Kingdom ◽  
The World ◽  
Summative Feedback

The proliferation of the use of new media and creativities are expanding the ways that humans engage creatively with music in the twenty-first century. As teachers and researchers, our methods of assessing these creativities need to expand as well. In this chapter the author points to some of the ways that music education has traditionally conceived of both creativity and the measurement of compositional activity in the classroom. However, it should be clear that formative, summative, feedback, diagnostic, and evaluative assessment are all necessary and vital to understanding and justifying the place of composition learning in music education, and that we as a profession have not done an adequate job of it in the past. Some countries, such as the United Kingdom, Finland, and Australia, have done a better job of creating curricular space for composition than the United States. The rest of the world can learn from these successes.

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