Physiological and Molecular Responses of the Marine Oligotrophic Ultramicrobacterium Sphingopyxis Alaskensis RB2256 to Visible Light and Ultraviolet Radiation PDF Download

Author: Sabine Matallana Surget
Publisher:
ISBN:
Category :
Languages : en
Pages : 450

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Book Description
Les rayonnements ultraviolets (UVR) pénétrent en profondeur dans les eaux claires oligotrophes affectant une large part de la couche euphotique. Les bactérie hétérotrophes marines jouent un rôle fondamental dans la reminéralisation de la matière organique dissoute et sont spécialement sensibles aux UVR à la surface des océans. Dans un contexte de changement climatique et réduction de la couche d'ozone, il est fondamental de mieux comprendre la physiologie et la réponse de bactéries marines abondantes, exposées aux UVR. Nous avons choisi comme modèle d'étude, la bactérie Sphingopyxis alaskensis, numériquement abondante dans les eaux oligotrophes et précédemment décrite comme photorésistante. Nous avons démontré que les dommages ADN sont fortement modulés par le GC%, la température de croissance et temps passé en phase stationnaire. Les modifications du protéome ont été également analysées par technique iTRAQ et des processus cellulaires originaux ont été caractérisés en réponse aux UVR.

Author: Martin Luke Ostrowski
Publisher:
ISBN:
Category : Biogeochemical cycles
Languages : en
Pages : 452

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Author: Edward F. DeLong
Publisher: Springer
ISBN: 9783642301193
Category : Science
Languages : en
Pages : 567

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The Prokaryotes is a comprehensive, multi-authored, peer reviewed reference work on Bacteria and Achaea. This fourth edition of The Prokaryotes is organized to cover all taxonomic diversity, using the family level to delineate chapters. Different from other resources, this new Springer product includes not only taxonomy, but also prokaryotic biology and technology of taxa in a broad context. Technological aspects highlight the usefulness of prokaryotes in processes and products, including biocontrol agents and as genetics tools. The content of the expanded fourth edition is divided into two parts: Part 1 contains review chapters dealing with the most important general concepts in molecular, applied and general prokaryote biology; Part 2 describes the known properties of specific taxonomic groups. Two completely new sections have been added to Part 1: bacterial communities and human bacteriology. The bacterial communities section reflects the growing realization that studies on pure cultures of bacteria have led to an incomplete picture of the microbial world for two fundamental reasons: the vast majority of bacteria in soil, water and associated with biological tissues are currently not culturable, and that an understanding of microbial ecology requires knowledge on how different bacterial species interact with each other in their natural environment. The new section on human microbiology deals with bacteria associated with healthy humans and bacterial pathogenesis. Each of the major human diseases caused by bacteria is reviewed, from identifying the pathogens by classical clinical and non-culturing techniques to the biochemical mechanisms of the disease process. The 4th edition of The Prokaryotes is the most complete resource on the biology of prokaryotes. The following volumes are published consecutively within the 4th Edition: Prokaryotic Biology and Symbiotic Associations Prokaryotic Communities and Ecophysiology Prokaryotic Physiology and Biochemistry Applied Bacteriology and Biotechnology Human Microbiology Actinobacteria Firmicutes Alphaproteobacteria and Betaproteobacteria Gammaproteobacteria Deltaproteobacteria and Epsilonproteobacteria Other Major Lineages of Bacteria and the Archaea

Author: Maik W. Jornitz
Publisher: CRC Press
ISBN: 1420030094
Category : Business & Economics
Languages : en
Pages : 640

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This book focuses on sterilizing grade filters in the biopharmaceutical industry, emphasizing practical applications of universal and dependable operational protocols, integrity testing, and troubleshooting to streamline the production and preparation of pharmaceuticals. Addresses the complexities of globalizing redundancy in filtration!

Author: Timothy Edgcumbe Ford
Publisher: Wiley-Blackwell
ISBN: 9780865422254
Category : Science
Languages : en
Pages : 518

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Book Description
Aquatic Microbiology: An ecological approach is organized by habitat, from freshwater and salt–water to extreme and anthropogenic systems. It offers new insights into the differing rates of microbes in various aquatic habitats, their relative abundance and growth rates, and their contribution to the biochemical cycling of elements.