Structure and Ultrastructure of Microorganisms
Structure and Ultrastructure of Microorganisms

Author: E. M. Brieger

Publisher: Academic Press

Published: 2013-10-22

Total Pages: 344

ISBN-13: 1483266052

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Structure and Ultrastructure of Microorganisms: An Introduction to a Comparative Substructural Anatomy of Cellular Organization presents the structure or principle of operation of the electron microscope. This book provides an introduction to the submicroscopical anatomy of the cell in ultrathin sections of tissues or of single-cell organisms. Organized into 30 chapters, this book begins with an overview of the structures discovered by the use of an optical tool for observation. This text then examines the anatomical principle to the nucleus. Other chapters consider the structural organization of chromatin as revealed in electron micrographs of thin sections through cells in different stages of division. This book discusses as well the macronuclei of the ciliates, which plays a significant part in the reproductive mechanism. The final chapter deals with the micromolecular organization of bacterial flagella. This book is a valuable resource for scientists, biologist, physicists, protozoologists, cytologists, biochemists, biophysicists, and research workers.

Ultrastructure Techniques for Microorganisms
Ultrastructure Techniques for Microorganisms

Author: H.C. Aldrich

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 540

ISBN-13: 1468451197

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The modem microbiologist is often a real specialist who has difficulty under standing and applying many of the techniques beyond those in his or her own immediate field. On the other hand, most benefits to modem microbiology are obtained when a broad spectrum of scientific approaches can be focused on a problem. In early studies, electron microscopy was pivotal in understanding bacterial and viral morphology, and we still feel that we will understand a disease better if we have seen an electron micrograph of the causative agent. Today, because there is an increased awareness of the need to understand the rela tionships between microbial structure and function, the electron microscope is still one of the most important tools microbiologists can use for detailed analysis of microorganisms. Often, however, the aforementioned modem microbiologist still thinks of ultrastructure as involving negative staining or ultrathin sectioning in order to get a look at the shape of a "bug. " Many of the newer ultrastructure techniques, such as gold-labeled antibody localization, freeze-fracture, X-ray microanalysis, enzyme localization, and even scanning electron microscopy, are poorly under stood by, and therefore forbidding to, the average microbiologist. Even many cell biologists admit to having difficulty staying in touch with current develop ments in the fast-moving field of electron microscopy techniques.

Ultrastructure of Bacterial Viruses
Ultrastructure of Bacterial Viruses

Author: Anna S. Tikhonenko

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 297

ISBN-13: 1468417797

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Mter the discoveryof the tobacco mosaic virus by D. I. Ivanov skU in 1892 [14], the new science of virology was born and began to develop rapidly. The number of viruses now known is enormous and they can infect nearly all animal and plant organisms. Microorganisms themselves are no exception to this rule. Despite intensive study of Vlruses, their origin and nature are still a subject for speculation and hypothesis. The general concept of viruses embraces a wide group of biologically active structures occupying an intermediate position between living and nonliving matter. The dual character of viruses is determined by the fact that, while they do not possess an inde pendent system of metabolism, which is a characteristic feature of every living being, they nevertheless carry within themselves all the necessary information for autoreproduction. A striking feature of the virus is that it consists essentially of two components: a protein envelope and the nucleic acid con tained within it. In contrast to the elementary structural unit of the living or ganism, the cell, which contains two types of nucleic acid (DNA and RNA), the virus particle contains only one type of nucleic acid - either DNA or RNA. It is perhaps this which is responsible for the imperfection of the virus as a living organism.

Bacterial Cell Wall
Bacterial Cell Wall

Author: J.-M. Ghuysen

Publisher: Elsevier

Published: 1994-02-09

Total Pages: 607

ISBN-13: 0080860877

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Studies of the bacterial cell wall emerged as a new field of research in the early 1950s, and has flourished in a multitude of directions. This excellent book provides an integrated collection of contributions forming a fundamental reference for researchers and of general use to teachers, advanced students in the life sciences, and all scientists in bacterial cell wall research. Chapters include topics such as: Peptidoglycan, an essential constituent of bacterial endospores; Teichoic and teichuronic acids, lipoteichoic acids, lipoglycans, neural complex polysaccharides and several specialized proteins are frequently unique wall-associated components of Gram-positive bacteria; Bacterial cells evolving signal transduction pathways; Underlying mechanisms of bacterial resistance to antibiotics.

Microbial Cell Walls and Membranes
Microbial Cell Walls and Membranes

Author: H. R. Perkins

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 555

ISBN-13: 9401160147

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In 1968 when Cell Walls and Membranes was published it was still reasonable to attempt to write a book covering the whole subject. Accordingly this edition of the book had something to say about walls from micro-organisms and plants as well as about membranes from bacteria and animal cells. A decade later this is manifestly impossible. Knowledge about almost all the subjects has grown explosively, par ticularly about membranes and the biosynthesis of macromolecules. Moreover aspects of the subject that were still in a relatively primitive state ten years ago have grown into highly sophisticated subjects worthy of extended treatment. The result is that the present book has had to be confined to structures and functions relating to only one division of the biological kingdom, namely micro-organisms. Even then severe limitations have had to be made to keep the task within the time available to the authors and their expertise. A few of the titles of chapters such as those on the isolation of walls and membranes, the structure of the components of bacterial and micro-fungal walls and their biosynthesis remain from the earlier book. These chapters have been almost completely rewritten and a number of quite new chapters added on topics such as the action of the antibiotics that inhibit bacterial wall syn thesis, on the function of bacterial membranes, and the bacterial autolysins.

The Ultrastructure of Pathogenic Bacteria under Different Ecological Conditions
The Ultrastructure of Pathogenic Bacteria under Different Ecological Conditions

Author: Larisa Mikhailovna Somova

Publisher: Cambridge Scholars Publishing

Published: 2020-02-09

Total Pages: 221

ISBN-13: 1527546810

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Today, the problem of bacteria variability occupies one of the key positions in microbiology. Particular attention is paid to the need to expand research to determine the variability of bacteria under natural habitats. There is still no solid information about the morphological variability of bacteria and its essence. This book is the first to summarise information about the ultrastructure of pathogenic bacteria under different conditions of existence. The results of extensive studies conducted in model microecosystems under various trophic and temperature conditions of cultivation presented here serve to fill this research gap. The book also describes the complex of similar morphological changes that provide the functional usefulness of different species of bacteria in detail, allowing the expression of the assumption that the adaptation mechanisms of heterogeneous populations of microorganisms to changing environmental conditions are universal.