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Books > Science & Mathematics > Biology, life sciences > Microbiology (non-medical) > General
With an ever-increasing human population, the demand placed upon the agriculture sector to supply more food is one of the greatest challenges for the agrarian community. In order to meet this challenge, environmentally unfriendly agroch- icals have played a key role in the green revolution and are even today commonly recommended to circumvent nutrient de?ciencies of the soils. The use of ag- chemicals is, though, a major factor for improvement of plant production; it causes a profound deteriorating effect on soil health (soil fertility) and in turn negatively affects the productivity and sustainability of crops. Concern over disturbance to the microbial diversity and consequently soil fertility (as these microbes are involved in biogeochemical processes), as well as economic constraints, have prompted fun- mental and applied research to look for new agro-biotechnologies that can ensure competitive yields by providing suf?ciently not only essential nutrients to the plants but also help to protect the health of soils by mitigating the toxic effects of certain pollutants. In this regard, the role of naturally abundant yet functionally fully unexplored microorganisms such as biofertilizers assume a special signi?cance in the context of supplementing plant nutrients, cost and environmental impact under both conventional practices and derelict environments. Therefore, current devel- ments in sustainability involve a rational exploitation of soil microbial communities and the use of inexpensive, though less bio-available, sources of plant nutrients, which may be made available to plants by microbially-mediated processes.
Fungal pathogens pose an on-going and serious threat for poikilotherms and homeotherms, and can cause a broad spectrum of diseases ranging from innocuous to life-threatening. In addition, long-term exposure to some mycotoxigenic moulds can lead to mycotoxicoses in human and animals. Given the expanding population of immune compromised hosts, the list of fungal opportunists grows longer every year. Moreover, antifungal resistance, drug-related toxicity and our limited arsenal of antifungals have exacerbated the situation. To address these problems, strategies such as the identification of novel targets, use of the structure-activity relationship in rational drug design, development of new formulations, modification of existing antifungals to combat resistance, and bioavailability enhancement are called for. For the reader's convenience, this book has been divided into three sections. The first six chapters of Section I provide a timely review of mycoses, from endemic to cosmopolitan and from generalized to specific, while both chapters of Section II focus on risks associated with mycotoxins. In closing, the two chapters of Section III describe potential antifungal leads and drug candidates based on phytochemicals and coumarin scaffold.
"Alginates: Biology and Applications" provides an overview of the state of art of alginate material properties, genetics and the molecular mechanisms underlying alginate biosynthesis as well as applications of tailor-made alginates in medicine, food and biotechnology. Topics treated are: material properties of alginates, alginate production: precursor biosynthesis, polymerization and secretion, bacterial system for alginate uptake and degradation, enzymatic alginate modification, alginate gene regulation, role of alginate in bacterial biofilms, microbial production of alginates: physiology and process aspects, alginate-based blends and nano/microbeads, applications of alginates in food, alginate and its comonomer mannuronic acid: medical relevance as drugs.
Bioethanol has been recognized as a potential alternative to petroleum-derived transportation fuels. Even if cellulosic biomass is less expensive than corn and sugarcane, the higher costs for its conversion make the near-term price of cellulosic ethanol higher than that of corn ethanol and even more than that of sugarcane ethanol. Conventional process for bioethanol production from lignocellulose includes a chemical/physical pre-treatment of lignocellulose for lignin removal, mostly based on auto hydrolysis and acid hydrolysis, followed by saccharification of the free accessible cellulose portions of the biomass. The highest yields of fermentable sugars from cellulose portion are achieved by means of enzymatic hydrolysis, currently carried out using a mix of cellulases from the fungus Trichoderma reesei. Reduction of (hemi)cellulases production costs is strongly required to increase competitiveness of second generation bioethanol production. The final step is the fermentation of sugars obtained from saccharification, typically performed by the yeast Saccharomyces cerevisiae. The current process is optimized for 6-carbon sugars fermentation, since most of yeasts cannot ferment 5-carbon sugars. Thus, research is aimed at exploring new engineered yeasts abilities to co-ferment 5- and 6-carbon sugars. Among the main routes to advance cellulosic ethanol, consolidate bio-processing, namely direct conversion of biomass into ethanol by a genetically modified microbes, holds tremendous potential to reduce ethanol production costs. Finally, the use of all the components of lignocellulose to produce a large spectra of biobased products is another challenge for further improving competitiveness of second generation bioethanol production, developing a biorefinery.
Advances in Microbial Physiology is one of the most successful and
prestigious series from Academic Press, an imprint of Elsevier. It
publishes topical and important reviews, interpreting physiology to
include all material that contributes to our understanding of how
microorganisms and their component parts work.
This volume discusses various basic and advanced methods and protocols that have been proven to be successful among certain bacterial species, or a family of species, in type III secretion systems (T3S system). The chapters in this book cover topics such as: site-directed mutagenesis and its application in studying the interactions of T3S components; use of transcriptional control to increase expression and secretion of heterologous proteins in T3S systems; fractionation techniques to examine effector translocation; detecting immune responses to T3S systems; mouse immunization with purified needle proteins from T3S systems and the characterization of the immune responses to these proteins; and detection of protein interactions in T3S systems using yeast 2-hybrid analysis. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Practical and comprehensive, Type 3 Secretion Systems: Methods and Protocols is a valuable resource for anyone interested in learning about the fascinating and ever-changing T3S systems.
This updated monograph deals with methanogenic endosymbionts of anaerobic protists, in particular ciliates and termite flagellates, and with methanogens in the gastrointestinal tracts of vertebrates and arthropods. Further chapters discuss the genomic consequences of living together in symbiotic associations, the role of methanogens in syntrophic degradation, and the function and evolution of hydrogenosomes, hydrogen-producing organelles of certain anaerobic protists. Methanogens are prokaryotic microorganisms that produce methane as an end-product of a complex biochemical pathway. They are strictly anaerobic archaea and occupy a wide variety of anoxic environments. Methanogens also thrive in the cytoplasm of anaerobic unicellular eukaryotes and in the gastrointestinal tracts of animals and humans. The symbiotic methanogens in the gastrointestinal tracts of ruminants and other "methanogenic" mammals contribute significantly to the global methane budget; especially the rumen hosts an impressive diversity of methanogens. This makes this updated volume an interesting read for scientists and students in Microbiology and Physiology.
Bioaugmentation, biostimulation and biocontrol approaches using microbial inoculants, biofertilizers, biochemicals and organic amendments improve soil biology, fertility and crop productivity by providing plant growth-promoting nutrients and suppressing soil-borne diseases and plant-parasitic nematodes. Our knowledge of microbial diversity and its function in soils has been increased tremendously due to the availability of a wealth of data gained through recent advances in the development of molecular methods and metagenomics for the evaluation of microbial diversity and functions in the rhizosphere environment of soil. Chapters dealing with the application of biofertilizers and organic amendments are contributed by experts - authorities in the area of soil science including microbiology and molecular biology - from academic institutions and the industry.
Mycorrhizal symbioses are central to the multitrophic interactions that impact plant productivity, competitiveness and survival. This book integrates present-day knowledge from well-known research groups on some of the topics which are at the forefront of mycorrhizal research. Topics include the cell programmes that drive mycorrhiza formation and function, the processes sustaining symbiotic mutualism, stress response mechanisms in mycorrhizal symbionts, and the diversity and ecological impacts of mycorrhizal systems. The efficient management of mycorrhizal systems has the potential to support the sustainable production of quality foods while ensuring environmental quality for future generations.
Endosymbiosis is a primary force in eukaryotic cell evolution. In order to understand the molecular mechanisms involved in this mutualistic relationship, experiments to reproduce endosymbiosis are indispensable. The ciliate "Paramecium" is an ideal host for performing such studies. Topics presented in this volume are: the origins of algal and bacterial symbionts in "Paramecium," the diversity of endosymbiotic bacteria, such as "Holospora" bacteria and especially "Chlorella" species, as well as the infection and maintenance processes. The metabolic control, the regulation of circadian rhythms and photobiological aspects of the mutualistic association, as well as the killer effect of "Paramecium" and its causative agents are further points discussed.
Recent advances in molecular technology have provided new microbial
imaging tools, not only complementing more classical methods, but
in many cases significantly enhancing the sensitivity and
efficiency in which studies may be conducted. These technologies
are applicable to a wide range of problems in contemporary
microbiology, including strain selection, understanding microbial
structure, function and pathophysiology, as well as in the
development of anti-microbial agents and vaccines. This volume
emphasizes detailed methodology, provides a theoretical background
and lists potential applications of specific imaging tools.
The development of sustainable and renewable biofuels is attracting growing interest. It is vital to develop robust microbial strains for biocatalysts that are able to function under multiple stress conditions. This Microbiology Monograph provides an overview of methods for studying microbial stress tolerance for biofuels applications using a systems biology approach. Topics covered range from mechanisms to methodology for yeast and bacteria, including the genomics of yeast tolerance and detoxification; genetics and regulation of glycogen and trehalose metabolism; programmed cell death; high gravity fermentations; ethanol tolerance; improving biomass sugar utilization by engineered Saccharomyces; the genomics on tolerance of Zymomonas mobilis; microbial solvent tolerance; control of stress tolerance in bacterial host organisms; metabolomics for ethanologenic yeast; automated proteomics work cell systems for strain improvement; and unification of gene expression data for comparable analyses under stress conditions.
In Antoni van Leeuwenhoek, Master of the Minuscule, the Father of Microbiology is presented in the context of his time, relationships and the Dutch Golden Age. Although he lacked an academic education, he dedicated his life to investigating the microscopic world using handmade, single-lensed microscopes and magnifiers. An expert observer, he planned experiments and designed equipment to test his theories. His pioneering discoveries included blood cells, protozoa, bacteria and spermatozoa, and resulted in an international reputation among the scientific and upper classes of 17th and 18th century Europe, aided by his Fellowship of the Royal Society of London. This lavishly illustrated biography sets his legacy of scientific achievements against the ideas and reactions of his fellow scientists and other contemporaries.
This book shares the latest insights into the genetic basis of molecular communication between plants and their microbial consortia. Further, the book highlights the capabilities of the rhizosphere and endosphere, which help manage ecosystem responses to climate change, nutrient cycling and sequestration of carbon; and discusses their application to the development and management of renewable energy sources. In their natural environments, plants are surrounded by a tremendous number of microorganisms. Some microbes directly interact with plants in a mutually beneficial fashion, while others colonize plants solely for their own advantage. In addition, microbes can indirectly affect plants by drastically altering their environments. Understanding the complex nature of the plant-microbe interface (PMI) can pave the way for novel strategies to improve plant productivity in an eco-friendly manner. The PMI approach focuses on understanding the physical, molecular, and chemical interactions between organisms in order to determine their functional roles in biological, physical, chemical and environmental systems. Although several metabolites from plants and microbes have now been fully characterized, their roles in chemical interactions between these associates remain poorly understood, and require further investigation.
The currently available means of combating fungal infections are weak and clumsy. The application of fungal genomics offers an unparalleled opportunity to develop novel antifungal drugs. Interestingly, several novel antifungal drug targets have already been identified and validated. However, it is premature to expect a novel antifungal agent in clinical setting as drug discovery programs are still in their infancy. In addition to classical and genomic approaches to drug discovery, treasure trove based on natural products and phytomedicine can provide a multitude of alternative modes of combating fungal infection. This book incisively addresses essential topics on various aspects pertaining to fungal diseases in human and animals, their reservoir, fungal pathogenesis, their management and recent advances in their treatment. Issues of antifungal drug toxicity, especially nephrotoxicity, are also discussed. The development of resistance in fungal pathogens, including multidrug resistance and its mechanism, is dealt with in two chapters. Diverse diagnostic approaches to fungal infections are also reviewed. The combinational drug strategies used in combating invasive fungal infections are addressed in detail. The management of pulmonary mycoses in stem cell transplantation is also given special focus. Novel antifungal drugs (synthetic and herbal), fungal vaccines, and metabolic pathways as drug targets are discussed in detail in three different chapters. Subsequently the roles of innate immunity, cytokine therapy and immunomodulators in the treatment of fungal infections are elaborated upon. As novel drug delivery systems have a great potential for modifying the pharmacokinetics of medications, the last chapter takes this fact into consideration in its examination of state-of-the-art delivery systems in controlling fungal infections.
This first volume of the Trilogy of Traditional Foods, part of the ISEKI Food Series, covers general and consumer aspects of traditional foods. It offers numerous recipes of traditional foods from across the world, with some chapters providing detailed descriptions on how to mix, cook, bake or store a particular food item in order to produce the desired effect. Traditional Foods; General and Consumer Aspects is divided into six sections. The first section focuses on general aspects of traditional foods and covers the perception of traditional foods and some general descriptions of traditional foods in different countries. This is followed by sections on Traditional Dairy Products, Traditional Cereal Based Products, Traditional Meat and Fish Products, Traditional Beverages and Traditional Deserts, Side Dishes and Oil products from various countries. The international List of Contributors, which includes authors from China, Bulgaria, Portugal, France, Norway, Romania, Slovakia, and Brazil, to name a few, shows its truly international perspective. The volume caters to the practicing food professional as well as the interested reader.
The birth and the development of molecular biology and, subsequently, of genetic engineering and biotechnology cannot be separated from the advancements in our knowledge of the genetics, biochemistry and physiology of bacteria and bacter- phages. Also most of the tools employed nowadays by biotechnologists are of bacterial (or bacteriophage) origin and the playground for most of the DNA manipulations still remains within bacteria. The relative simplicity of the bacterial cell, the short gene- tion times, the well defined and inexpensive culturing conditions which characterize bacteria and the auto-catalytic process whereby a wealth of in-depth information has been accumulated throughout the years have significantly contributed to generate a large number of knowledge-based, reliable and exploitable biological systems. The subtle relationships between phages and their hosts have produced a large amount of information and allowed the identification and characterization of a number of components which play essential roles in fundamental biological p- cesses such as DNA duplication, recombination, transcription and translation. For instance, to remain within the topic of this book, two important players in the or- nization of the nucleoid, FIS and IHF, have been discovered in this way. Indeed, it is difficult to find a single fundamental biological process whose structural and functional aspects are better known than in bacteria.
Phosphorus (P) is a finite resource which is essential for life. It is a limiting nutrient in many ecosystems but also a pollutant which can affect biodiversity in terrestrial ecosystems and change the ecology of water bodies. This book collects the latest information on biological processes in soil P cycling, which to date have remained much less understood than physico-chemical processes. The methods section presents spectroscopic techniques and the characterization of microbial P forms, as well as the use of tracers, molecular approaches and modeling of soil-plant systems. The section on processes deals with mycorrhizal symbioses, microbial P solubilization, soil macrofauna, phosphatase enzymes and rhizosphere processes. On the system level, P cycling is examined for grasslands, arctic and alpine soils, forest plantations, tropical forests, and dryland regions. Further, P management with respect to animal production and cropping, and the interactions between global change and P cycling, are treated.
This book describes the vast variety of xenobiotics, such as pesticides, antibiotics, antibiotic resistance genes, agrochemicals and other pollutants, their interactions with the soil environment, and the currently available strategies and techniques for soil decontamination and bioremediation. Topics covered include: transport mechanisms of pollutants along the Himalayas; use of earthworms in biomonitoring; metagenomic strategies for assessing contaminated sites; xenobiotics in the food chain; phyto-chemical remediation; biodegradation by fungi; and the use of enzymes and potential microbes in biotransformation. Accordingly, the book offers a valuable guide for scientists in the fields of environmental ecology, soil and food sciences, agriculture, and applied microbiology.
Innovative technologies are propelling microbiology into an exciting new era which will witness the harnessing and control of complex microbial communities in a huge variety of applications in the industrial, medical and environmental spheres. This book presents emerging molecular methods that allow the diversity of a microbial community to be surveyed and its functions to be investigated.
This unique book explores the role of retrotransposons in human health and disease. The ability of retrotransposons to affect the structure of human genes is recognized since the late 80's. However, the advances of deep-sequencing technologies have shed new light on the extent of retrotransposon-mediated genome variations. These progresses have also led to the discovery that retrotransposon activity is not restricted to the germline - resulting in inheritable genetic variations - but can also mobilize in somatic tissues, such as embryonic stem cells, neuronal progenitor cells, or in many cancers. This book covers topics related to the effects of retrotransposon insertions, and their consequences on germline and somatic genome dynamics, but also discuss the role and impact of retrotransposons sequences in a broader context, including a number of novel topics that emerged recently (long non-coding RNA, neuronal disorders, exaptation) with unexpected connections between retrotransposons, stem cell maintenance, placentation, circadian cycles or aging.
The central theme of this book "Microbial BioEnergy: Hydrogen Production" is focused on the biological machinery that microorganisms use to produce hydrogen gas.The book summarizes the achievements over the past decade in the biochemistry, structural and molecular biology, genomics and applied aspects of microbial H2-production, including microbial fuel cells (MFC), by phototrophs such as purple sulfur and non-sulfur bacteria ("Thiocapsa" spp., "Rhodobacter "and "Rhodopseudomonas" spp.) microalgae ("Chlamydomonas")and cyanobacteria ("Anabaena spp.") along with anaerobes and thermophiles such as "Caldicellulosiruptor "and "Thermotoga." This is the first bookof this series entirely devoted to microbial bio-hydrogen production and is intended to be a precious source of information for PhD students, researchers and undergraduates from disciplines such as microbiology, biochemistry, biotechnology, photochemistry and chemical engineering, interested in basic and applied sciences."
Agriculture is the main occupation in India and about 75% of its population depends directly or indirectly on agriculture for their livelihood. It is the dominant sector that contributes 18% of the gross domestic product. Thus, agriculture is the foundation of the Indian economy. The maximum share of Indian exports is also from the agriculture sector. As the population of the country is increasing trem- dously, approximately at the rate of 19 million every year over the existing popu- tion of more than 1 billion (approximately 1. 18 billion), the food grain production must necessarily be increased. This can be done by increasing crop production to match the population growth rate of 2. 2% per annum, which is expected to stabilize at 1. 53 billion around 2050. There is no doubt that the Green Revolution in India during the late 1960s brought self-sufficiency in food grain production, mainly through the increase in rice and wheat crop yields - the two main crops of the country which play an important role from food security point of view. However, the excessive use of fertilizers and pesticides, and the neglect of organic manures for these crops, has resulted in the deterioration of physical, chemical and biological health of the ri- and wheat-growing soils. Owing to the deterioration of the health of these soils, the productivity of the rice-wheat cropping system has now either got reduced or in some places has become constant for the last decade.
Molecular research on algae over the last decades has provided significant insights into universal biological mechanisms. This knowledge has proved essential to the field of biotechnology where research on new applications in food culture, biofuel and pharmaceuticals is underway. This new book on algal cell biology provides an overview of cutting-edge research with a focus on cytoskeleton structure/function and cytokinesis of algae.
'Access to safe water is a fundamental human need and therefore a
basic human right' "Kofi Annan, United Nations Secretary General"
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