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Spermatogenesis is a process highly conserved throughout vertebrate species and is mainly under hypothalamic-pituitary control. It occurs in the testis in a stepwise fashion so that committed spermatogonia develop into spermatocytes and enter meiosis to produce round spermatids. These undergo a morphological transformation (spermiogenesis) into mature spermatids (i.e.: spermatozoa), which are differentially released from Sertoli cells (spermiation) depending on the species. In mammals, further transformations are necessary to form mature spermatozoa, suitable for fertilization. Gonadotropins, mainly responsive to gonadotropin-releasing hormone, control spermatogenesis through specific recept...
Oxygen represents only 20% of the Earth's atmosphere, yet it is vital for the survival of aerobic organisms. There is a dark part of the use of oxygen that consists in generating reactive species that are potentially harmful to living organisms. Moreover, reactive oxygen species can combine with nitrogen derivatives and generate many other reactive species. Thus, living organisms are continuously assaulted by reactive species from external or internal sources. However, the real danger comes in the case of high concentrations and prolonged exposure to these species. This book presents an image of the mechanisms of action of reactive species and emphasizes their involvement in diseases. Inflammation and cancer are examined to determine when and how reactive species turn the evolution of a benign process to a malignant one. Some answers may come from recent studies indicating that reactive species are responsible for epigenetic changes.
Biofuels are promising eco-friendly, renewable energy alternatives, simultaneously curbing the dependence on depleting fossil fuel reserves, reducing the global carbon footprint. However, there have been technological constraints deterring the global wide-scale adoption of biofuel. Biofuels: Scientific Explorations and Technologies for a Sustainable Environment presents a comprehensive analysis of different types of biofuels. Five sections provide detailed information on the history and discovery of biofuels, first-generation biofuels, second-generation biofuels, third-generation biofuels, and beyond, as well as prospects of biofuels as cleaner and greener alternatives. FEATURES Introduces t...
This volume includes the papers presented during the 1st Euro-Mediterranean Conference for Environmental Integration (EMCEI) which was held in Sousse, Tunisia in November 2017. This conference was jointly organized by the editorial office of the Euro-Mediterranean Journal for Environmental Integration in Sfax, Tunisia and Springer (MENA Publishing Program) in Germany. It aimed to give a more concrete expression to the Euro-Mediterranean integration process by supplementing existing North-South programs and agreements with a new multilateral scientific forum that emphasizes in particular the vulnerability and proactive remediation of the Euro-Mediterranean region from an environmental point o...
[Italiano]: Il Consortium Muna (Mediterranean and Middle East University Network Agreement) è stato fondato nel 2015 e rinnovato nel 2021, quando 30 Università provenienti da tutti i Paesi dell'area mediterranea e alcune altre dal Medio Oriente hanno firmato l'Accordo Quadro. Come scritto nell'Accordo Quadro, anche in questo spazio Muna della Conferenza CUCS, proponiamo tre diversi temi principali: MARE NOSTRUM (il nostro Mare, il Mediterraneo), PERSONA (l'Uomo) e ORBIS (la Terra), per riassumere le proposte di Cooperazione tra le Università di Muna Network. La prima sessione è dedicata al campo di ORBIS per condividere la sostenibilità, attraverso la biodiversità come elemento chiave ...
This volume contains refereed manuscripts prepared from presentations made at the 2ih annual meeting of the International Society on Oxygen Transport to Tissue (ISOTT). The meeting was held in Hanover, NH, USA, at Dartmouth Medical School, the 3rd oldest medical school in the USA. ISOTT attempts to produce high quality pUblications on cutting edge topics relating to oxygen in living systerns. The goal is to allow contributors to contribute original data, as with a main-stream journal article, but also to voice individual opinions and ideas in a more relaxed scientific forum. The meeting brought together an international group of scientists who share a common interest in the measurement and r...
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During the past two decades, fish endocrinology has witnessed exciting developments due to our increased knowledge at all levels of biological organizations, including molecular biology, cell biology, physiology and behavior. New insights into development, neurobiology, immunology and molecular genetics closely correlated with classical aspects of endocrinology and represent important contributions to our knowledge on regulatory processes of vertebrates, including fish. The purpose of this book is to overview major advances in numerous research areas of fish endocrinology. Most of the chapters not only review and discuss the state-of-the-art in the respective field, but also show perspectives of future research. The book will be of interest to scientists involved in basic fish research, comparative endocrinology, fisheries and aquaculture as well as for students of fish biology.