Transition metal-catalyzed reactions play a key role in many transformations of synthetic organic chemistry. For most of these reactions, noble metals, for example, palladium, have been used as catalysts. Over the last two decades, more and more first row transition metals have been applied as catalysts for organic reactions, with iron taking the center stage. The driving forces behind this development are not only the high costs for the noble metals but also their toxicity. Iron is the most abundant transition metal in the Earth’s crust, and thus, it is considerably cheaper than the precious noble metals. Moreover, iron compounds are involved in many biological processes, and thus, iron exhibits a low toxicity. Because of this low toxicity, iron-catalyzed reactions are important for an environmentally benign sustainable chemistry. However, iron catalysts are not only investigated to replace noble metals; they offer many applications in synthesis beyond those of classical noble metal catalysts. Several articles of the present book emphasize the complementarity of iron-catalyzed reactions as compared to reactions catalyzed by noble metals. The book shows intriguing recent developments and the current standing of iron-catalyzed reactions as well as applications to organic synthesis.
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For decades, the discourse on climate change has been framed as an environmental concern, a matter of conservation, emissions targets, and scientific modeling. While not incorrect, this framing is dangerously incomplete. To understand the full gravity of our predicament, we must shift our lens, climate change is the paramount “threat multiplier” of our age, fundamentally redefining the landscape of national and global security. This book moves beyond polar bears and melting ice to examine how
Thema dieser Abhandlung ist die Untersuchung der Bezüge zwischen Musik und Dichtung in der Lyrik Pasternaks. Im Hauptteil soll sodann die Bedeutung der Musik in Pasternaks Lyrik in doppeltem Sinne untersucht werden - auf verstechnisch-stilistischer und auf motivischer Ebene, wobei im ersten Bereich neben den Formmitteln der Lyrik (wie Metrik, Reim- und Strophenformen) auch bestimmte Verfahren der besonderen Koppelung von Laut und Bedeutung analysiert werden. Der zweite Bereich des Hauptteils umfaßt neben der "realen" Musikgeschichte in Pasternaks Lyrik (etwa der Erwähnung von Komponistennamen und Musikinstrumenten) vor allem die Untersuchung literarischer Leitmotive, die mit der Musik in Verbindung stehen, wie insbesondere Vögel, Wind, Wasser, Klang und Stille.
There are certain men, said my uncle, Professor Aronnax, whom Nature has endowed with a peculiar restlessness of the spirit. It is a fever of the mind that drives them from the warm hearth and the familiar street, propelling them towards the unknown, the inhospitable, and the mathematically improbable. I had always considered myself a man of the study, a classifier of data, until the day I met Dr. Théo Caspian.
What does it mean to be human in a world of technology? What could be the role of religion in responding to the ecological crisis? Should we be concerned about the modification of food, and even of ourselves? Who do we trust to make decisions regarding our common future? What do we use our technology for? These are not questions for experts only. How can the wider public be involved? Do experts and the general public trust each other sufficiently? Or is the public ignorant, in the eyes of the scientists? And are too many engineers narrow minded, according to the general public? The contributors to this timely and necessary volume address expertise, trust and engagement, as we consider our technological condition , religious resources for the ecological crisis , biotechnology , and matters of trust between scientists and the general public. With contributions from leading scholars in the field, including James Miller from Queen's University, Canada and Tony Watling from the University College, London, this book will captivate a range of readers interested in the spirtitual dimension of of our culture and society.Wat is de invloed van technologie op de menselijke cultuur? Welke rol kan religie spelen als reactie op de dreigende ecologische crisis? Moeten we ons zorgen maken over de modificatie van voedsel, en ook zelfs van de mens? Waar willen we technologische ontwikkelingen voor inzetten een aan wie vertrouwen wij beslissingen over onze toekomst toe? Dergelijke vragen gaan niet alleen de experts maar iedereen aan. Hoe kan het grote publiek deelnemen aan het technologische debat? Of is het publiek te onwetend om mee kunnen praten? In Technology, Trust and Religion gaan zestien wetenschappers op dit onderwerp in en worden deskundigheid, vertrouwen en betrokkenheid tegen het licht gehouden.
The night was unlike any Johnathan Cray had ever known, an oppressive, choking silence that clung to the air like the weight of forgotten horrors. The once-thriving town of Dunwich had been reduced to ash and rubble, its decaying buildings standing as broken sentinels to a calamity beyond comprehension.
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It was a cold January evening when Eli Tannen walked down the worn-out dirt road that led to the edge of the Hollow Brook forest, where the maples stood in their quiet, eternal rows. His boots crunched against the frost as the wind cut through his threadbare coat. He hadn't been down this path in over a year, not since his father passed and left him the family business.
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An hour before sunset, on the kind of cool October evening that makes you remember every poor decision you ever made, a man on a motorcycle entered the town he’d sworn he’d left for good. The few persons who were at their windows regarded this traveller with a sort of distrust, which was fair, because I regarded the town with the same suspicion.
Running a yoga studio involves more than teaching classes. It also requires building awareness, connecting with the community, and attracting new students consistently. Digital marketing helps yoga studios reach people who are looking for wellness, relaxation, and mindful movement. With the right approach, studios can grow their student base while maintaining the calm and authentic environment that yoga represents.
Cruise lines operate in a highly competitive travel industry where inspiring travelers and building trust are essential. Most passengers begin planning their vacations online, researching destinations, comparing cruise options, and reading reviews before making a decision. Digital marketing allows cruise lines to connect with potential travellers at every stage of this journey, from the first search to the final booking.
Glass fibres are melt-spun, silica-based inorganic materials. Their main application is in glass fibre-reinforced composites, which account for more than 90% of all fibre-reinforced composites currently produced. Nevertheless, improvement of the key properties of composites remains challenging. The objective of this reprint is to focus on actual research topics related to glass fibres comprising multifunctional nanostructured surfaces, e.g., graphene, which can lead to electrically conductive fibres and their interphases in composites that are capable of uptake under a variety of mechanical, chemical, humidity, and thermal conditions for in situ sensing functions. Sizing of glass fibres help to protect the filaments from failure during processing and improves wetting and adhesion strength. Furthermore, the interphase may be varied by suppressing or promoting heterogeneous nucleation of a thermoplastic matrix and, thus, the transcrystalline layer can improve the mechanical performance. Improved interfacial shear strength was shown with chitosan as a coupling agent in phosphate glass fiber/polycaprolactone composites. Modulus mapping of plasma-synthesised interphases in glass fibre/polyester composites was used to examine the local mechanical properties across the interphase region. In addition, numerous analytical techniques were applied to investigate changes within the surface of unsized boron-free E-glass fibers after thermal conditioning at temperatures up to 700 °C.
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