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The Reaction Path in Chemistry: Current Approaches and Perspectives
The so-called reaction path (RP) with respect to the potential energy or the Gibbs energy ("free enthalpy") is one of the most fundamental concepts in chemistry. It significantly helps to display and visualize the results of the complex microscopic processes forming a chemical reaction. This concept is an implicit component of conventional transition state theory (TST). The model of the reaction path and the TST form a qualitative framework which provides chemists with a better understanding of chemical reactions and stirs their imagination. However, an exact calculation of the RP and its neighbourhood becomes important when the RP is used as a tool for a detailed exploring of reaction mecha...
Deschooling as a Taboo Transgression
With the realization of familial deschooling in Germany, the so-called social movement of the ,Freilerner’ transgresses a taboo and is therefore under enormous pressure to justify itself. Following on from this, the reconstructive study asks what latent structures of meaning underlie the subjective crisis scenarios about the schooling of children and the ideal concepts of parents in the sense-giving justification of the family deschooling practice. In the course of this, three types of the justification for the familial practice of deschooling, namely defending, charismatizing, and escaping, are empirically established. In this way, the study not only makes an empirically based contribution to a more reflective discourse on alternative educational practices, but also pushes itself into a taboo zone of school pedagogy and educational research in Germany. Because it addresses the school as a historically consolidated, but not as an organization without alternatives for learning and educational processes of children and adolescents.
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Contemporary Intelligence in Africa
The edited volume examines contemporary intelligence and tradecraft in Africa. The work offers a timely and empirically grounded account of African intelligence. It provides a multi-contributor narrative that explains contemporary dynamics without discounting historical and external influences, as well as explaining systemic dynamics borne by African agency. The volume features chapters on different issues and themes in intelligence studies, which include but are not limited to intelligence politicization, covert operations and subversion during political transitions, institutionalizing intelligence in post-conflict states, intelligence and counterterrorism, financial intelligence and comple...
Food for All in Africa
Africa requires a new agricultural transformation that is appropriate for Africa, that recognizes the continent's diverse environments and climates, and that takes into account its histories and cultures while benefiting rural smallholder farmers and their families. In this boldly optimistic book, Sir Gordon Conway, Ousmane Badiane, and Katrin Glatzel describe the key challenges faced by Africa's smallholder farmers and present the concepts and practices of Sustainable Intensification (SI) as opportunities to sustainably transform Africa's agriculture sector and the livelihoods of millions of smallholders. The way forward, they write, will be an agriculture sector deeply rooted within SI: pr...
Closteroviridae
Plant viruses grouped within this family have remarkable properties, prominent among which is their genomic size: Citrus tristeza virus (CTV) has the largest (19.3 kb) genome reported for a plant monopartite single-stranded RNA (+) virus. Virions are filamentous and typically flexuous particles, approximately 12 nm in diameter and 650 to 2000 nm in length, with a unique bipolar (“rattlesnake”) morphology: the major coat protein (CP) encapsidates most of the genomic RNA, with a minor CP (CPm) coating a small 5’-terminal fragment (virion tail) and other viral-encoded proteins being also incorporated to this tail. The genome is monopartite (genus Closterovirus, type member Beet yellows vi...
Osiris, Volume 37
Highlights the importance of translation for the global exchange of medical theories, practices, and materials in the premodern period. This volume of Osiris turns the analytical lens of translation onto medical knowledge and practices across the premodern world. Understandings of the human body, and of diseases and their cures, were influenced by a range of religious, cultural, environmental, and intellectual factors. As a result, complex systems of translation emerged as people crossed linguistic and territorial boundaries to share not only theories and concepts, but also materials, such as drugs, amulets, and surgical tools. The studies here reveal how instances of translation helped to s...
Potato virus Y: biodiversity, pathogenicity, epidemiology and management
Potato virus Y (PVY) infects a wide host range mainly within the Solanaceae and is distributed worldwide. PVY is transmitted by more than 40 aphid species in a non persistent manner. Isolates of the PVY species are highly variable at biological, serological and molecular levels. Epidemiological studies have highlighted the emergence of distinct potato PVY variants able to induce necroses on potato tubers. Due to the lack of efficient resistance to PVY isolates inducing necrotic symptoms in cultivated varieties and the plant-to-plant transmission of isolates through the daughter tubers, PVY has become the most economically important virus for the potato industry. The review offers an overview of several decades of research on PVY but also focuses on the latest data obtained by expert on PVY worldwide on the biological characteristics of PVY, interactions between aphids-hosts, its evolution and management. Identified knowledge gaps to understand further PVY biology will be discussed.
