Magnetoreception and Magnetosomes in Bacteria PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Magnetoreception and Magnetosomes in Bacteria PDF full book. Access full book title Magnetoreception and Magnetosomes in Bacteria by Dirk Schüler. Download full books in PDF and EPUB format.
Author: Dirk Schüler
Publisher: Springer Science & Business Media
ISBN: 354037468X
Category : Science
Languages : en
Pages : 323
Get Book Here
Book Description
This volume details recent developments in magnetotactic bacteria research. It includes reviews on the formation and organization of magnetosomes, the genes controlling magnetosome biomineralization, and new cryogenic techniques to visualize novel cytoskeleton structures. Coverage also describes potential nanobiotechnological applications of the magnetosome crystals.
Author: Dirk Schüler
Publisher: Springer Science & Business Media
ISBN: 354037468X
Category : Science
Languages : en
Pages : 323
Get Book Here
Book Description
This volume details recent developments in magnetotactic bacteria research. It includes reviews on the formation and organization of magnetosomes, the genes controlling magnetosome biomineralization, and new cryogenic techniques to visualize novel cytoskeleton structures. Coverage also describes potential nanobiotechnological applications of the magnetosome crystals.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Get Book Here
Book Description
Magnetotactic bacteria are a diverse group of prokaryotes with the ability to orient and migrate along the magnetic field lines in search for a preferred oxygen concentration in chemically stratified water columns and sediments. These microorganisms produce magnetosomes, the intracellular nanometer-sized magnetic crystals surrounded by a phospholipid bilayer membrane, typically organized in chains. Magnetosomes have nearly perfect crystal structures with narrow size distribution and species-specific morphologies, leading to well-defined magnetic properties. As a result, the magnetite biomineralization in these organisms is of fundamental interest to diverse disciplines, from biotechnology to astrobiology. As a result, this article highlights recent advances in the understanding of the bacterial magnetite biomineralization.
Author: Nicholas J. Darton
Publisher: Cambridge University Press
ISBN: 1107031095
Category : Medical
Languages : en
Pages : 317
Get Book Here
Book Description
Drawing together topics from a wide range of disciplines, and featuring up-to-date examples of clinical usage and research applications, this text provides a comprehensive insight into the fundamentals of magnetic biosensors and the applications of magnetic nanoparticles in medicine.
Author: BIOMAGNETECH CORP NEW YORK.
Publisher:
ISBN:
Category :
Languages : en
Pages : 151
Get Book Here
Book Description
Basic D.C. magnetic and gigahertz properties of magnetosome chains in the magnetotactic bacterium Aquaspirillium magnetotacticum were investigated. Cell yield in fermenter grown and batch cultures were increased by over an order of magnitude to 5 x 10 to the 9th power cells/ml, making large-scale production of A. magnetotacticum and magnetosomes possible. D.C. hysteresis and A.C. gigahertz remanence studies were carried out on whole cells, separated magnetosome chains and cells aligned on substrates. The results were compared with synthetic FE3O4 (Iron 3 Oxygen 4) and gamma-Fe2O3 particles. Electromagnetic absorption is zero and in applied magnetic fields was determined up to 400 gigahertz for cells suspended in an inert binder. Birefringence of an aligned sample was detected. Magnetosomes in cells were shown to be enveloped by phospholipid bilayer membranes with membrane proteins, some of which are not present in the cellular plasma membrane. Research was also initiated on genetic transfer of magnetosome production, and on bioaccumulation by A. magnetotacticum of Pu4+ (platonium) and other heavy metal ions from water. Keywords: Magnetotactic bacteria. (kt).
Author: János F. László
Publisher: Bentham Science Publishers
ISBN: 1681081024
Category : Medical
Languages : en
Pages : 377
Get Book Here
Book Description
Some arrangements and structures of permanent magnets are hypothesized to exert measurable physiological and pathological effects on living tissues when exposed to the resultant electromagnetic field. From Microbe to Man: Biological responses to artificial static magnetic field-exposure explores the effects of such arrangements based on this hypothesis. The book begins with an explanation of the mechanisms of artificial static magnetic fields (SMFs). This is followed by sequential sections presenting the effects of SMF exposure on living organisms backed by thorough experimental studies (on microbial, animal and human trials). In conclusion, the work reveals the positive nature of SMF treatment and shows that this is indeed a viable alternative to invasive treatment in the case of a number of both acute and chronic conditions, such as stomatological pain and osteoporosis. From Microbe to Man: Biological responses to artificial static magnetic field-exposure is aimed chiefly at medical professionals and the research community studying alternatives to conventional pain medicine and physiotherapy. However, laypeople interested in non-invasive medical treatment options can also benefit from the easy-to-read layout of the contents of this volume.
Author: Michele S. Swanson
Publisher: John Wiley & Sons
ISBN: 1683673727
Category : Science
Languages : en
Pages : 756
Get Book Here
Book Description
Microbe Microbe THIRD EDITION Brings the excitement, breadth, and power of the modern microbial sciences to the next generation of students and scientists. This third edition of the bestselling Microbe textbook is an eloquent and highly readable introduction to microbiology that will engage and excite science majors and pre-health professionals. The authors have carefully crafted a lively narrative with stunning, detailed illustrations to bring key concepts to life and promote a lifelong passion for the microbial sciences. Microbe is replete with case studies, ranging from a MRSA (methicillin-resistant Staphylococcus aureus) outbreak in an NFL locker room to the search for life outside of Earth, that illustrate relevant microbiology concepts in real-world scenarios. To further engage students and deepen their understanding of both the principles and practice of science, each chapter includes activities that encourage students to demonstrate and apply their knowledge of the topics presented. Questions are posed throughout each chapter to introduce important subjects and to prompt students to actively participate in the learning experience. This new edition also features highlight boxes exploring the varied roles and applications of microbes at work in our world as well as profiles of the diverse array of individuals who work in and adjacent to the field of microbiology. An equally valuable tool for instructors of all classroom modalities, Microbe integrates key concepts, learning outcomes, and fundamental statements directly from the ASM Curriculum Guidelines for Undergraduate Microbiology. The new edition also provides robust instructor materials, including slides with figures and tables from the text, access to more than 250 peer-reviewed questions for microbiology education, and an instructors’ manual featuring answers for end-of-chapter questions as well as supplemental exercises and resources to challenge students to dig deeper into their understanding of the material. "This is a fantastic text that makes microbiology accessible to students. The new edition highlights a One Health perspective and the impact of microbiology on society and the human experience. The stories of Microbiologists at Work reflect the diversity of individuals making contributions to the field through a range of career paths. The conversational, engaging writing style; the learning outcomes that provide roadmaps for guided reading; and the clear, concise figures make this a text my students enjoy." —Mary E. Allen, Professor of Biology & Coordinator of Academic Assessment, Hartwick College "Microbe is one of the best undergraduate textbooks I have used to teach microbial metabolism. It has the perfect mix of examples from both the research literature and the real world for explaining challenging concepts to students. The new human gut microbiome chapter is amazing and does a great job of tying in concepts students learn in earlier chapters." —Kersten Schroeder, Assistant Professor of Medicine, Burnett School of Biomedical Sciences-College of Medicine, University of Central Florida
Author: Daniel Acosta-Avalos
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 0
Get Book Here
Book Description
Magnetotactic bacteria are able to align their swimming direction to the geomagnetic field lines because they possess a magnetic moment. These bacteria biomineralize magnetic nanoparticles, magnetite or greigite, inside a membrane. The membrane + nanoparticle set is known as magnetosome and intracellular magnetosomes are disposed in a linear chain. Cytoskeleton-like filaments are resposible for the mechanical stability of this chain. The genes responsible for the magnetosome membrane and for the cytoskeleton proteins have been largely studied: the mam genes. The magnetosome chain also confers to the bacterial body a magnetic moment that can be measured through different physical techniques. Because of their response to magnetic field inversions, magnetotactic bacteria are good models to study bacterial motion. Theoretical and experimental studies show that magnetotactic bacteria swim following a trajectory similar to cylindrical helix. Magnetotactic microorganisms have been observed avoiding regions with UV or violet-blue light of high intensity. If the intensity is lower, magnetotactic microorganims show photokinesis, increasing their velocity in the presence of red light and decreasing their velocity in the presence of green light, both relative to the velocity with blue light.
Author: Damien Faivre
Publisher: Frontiers E-books
ISBN: 2889192725
Category : Microbiology
Languages : en
Pages : 136
Get Book Here
Book Description
Bacteria can sequester metals and other ions intracellularly in various forms ranging from poorly ordered deposits to well- ordered mineral crystals. Magnetotactic bacteria provide one example of such intracellular deposits. They synthesize intracellular magnetic minerals of magnetite (Fe3O4) and/or greigite (Fe3S4) magnetosomes which are generally less than 150 nm and organized into one or multiple chain structures. The magnetosome chain(s) act like a compass needle to facilitate the navigation of magnetotactic bacteria by using the Earth’s magnetic field. Due to their ubiquitous distribution in aquatic and sedimentary environments, magnetotactic bacteria play important roles in global iron cycling. Other intracellular mineral phases have been evidenced in bacteria such as As2S3, CaCO3, CdS, Se(0) or various metal phosphates which may play as well a significant role in the geochemical cycle of these elements. However, in contrast to magnetotactic bacteria, the biological and environmental function of these particles remains a matter of debate. In recent years, such intracellularly biomineralizaing bacteria have become an attractive model system for investigating the molecular mechanisms of organelle-like structure formation in prokaryotic cells. The geological significance of intracellular biomineralization is important; spectacular examples are fossil magnetosomes that may significantly contribute to the bulk magnetization of sediments and act as potential archives of paleoenvironmental changes. In addition, intracellular mineral deposits formed by bacteria have potentially versatile applications in biotechnological and biomedical fields. After more than four decades of research, the knowledge on intracellularly biomineralizing bacteria has greatly improved. The aim of this Research Topic is to highlight recent advances in our understanding of intracellular biomineralization by bacteria. Magnetotactic bacteria are a system of choice for that topic but other intracellularly biomineralizing bacteria may bring a unique perspective on that process. Research papers, reviews, perspectives, and opinion papers on (i) the diversity and ecology of intracellularly biomineralizing bacteria, (ii) the molecular mechanisms of intracellular biomineralization, (iii) the chemo- and magneto-taxis behaviors of magnetotactic bacteria, (iv) the involvement of intracellularly biomineralizing bacteria in local or global biogeochemical cycling, (v) the paleoenvironmental reconstructions and paleomagnetic signals based on fossil magnetosomes, (vi) and the applications of intracellular minerals in biomaterial and biotechnology were welcomed.
Author: Iqbal Ahmad
Publisher: Springer Science & Business Media
ISBN: 144197931X
Category : Technology & Engineering
Languages : en
Pages : 522
Get Book Here
Book Description
This book focuses on successful application of microbial biotechnology in areas such as medicine, agriculture, environment and human health.
Author: Joseph L. Kirschvink
Publisher: Springer Science & Business Media
ISBN: 1461303133
Category : Science
Languages : en
Pages : 679
Get Book Here
Book Description
The mystery of how migrating animals find their way over unfamiliar terrain has intrigued people for centuries, and has been the focus of productive research in the biological sci ences for several decades. Whether or not the earth's magnetic field had anything to do with their navigational abilities has sufaced and been dismissed several times, beginning at least in the mid to late 1800s. This topic generally remained out of the mainstream of scientific research for two reasons: (1) The apparent irreproducibility of many of the be havioral experiments which were supposed to demonstrate the existence of the magnetic sense; and (2) Perceived theoretical difficulties which were encountered when biophysi cists tried to understand how such a sensory system might operate. However, during the mid to late 1960s as the science of ethology (animal behavior) grew, it became clear from studies on bees and birds that the geomagnetic field is used under a variety of conditions. As more and more organisms were found to have similar abilities, the problem shifted back to the question as to the basis of this perception. Of the various schemes for trans ducing the geomagnetic field to the nervous system which have been proposed, the hy pothesis of magnetite-based magnetoreception discussed at length in this volume has per haps the best potential for explaining a wide range of these effects, even though this link is as yet clear only in the case of magnetotactic bacteria.
