Download or read book Modeling the Environmental Fate of Microorganisms written by Christon J. Hurst and published by Amer Society for Microbiology. This book was released on 1991-01 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is uniquely written both for microbiologists interested in the application of statistical models to their work and for engineers and statisticians who have little experience in microbiology. Mathematical modelling is an essential tool in public health research, wastewater treatment and disinfection, plant pathology, soil science and geology, bioremediation, and applied microbiology and virology

Download or read book Environmental Fate Modelling of Pesticides written by Otto Richter and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is concerned with modelling the fate of organic substances in the soil. Once a chemical enters the soil it is subject to various transformation processes. It partitions between the liquid, solid and gaseous phase, it is sorbed to different binding sites with a different strength of bonding, it may decay by a simple chemical process or it may be transformed by microorganisms. Solute transport through soil and subsurface is mediated by water flow and is strongly influenced by solute sorption. To complicate matters, soil structures are heterogeneous. All these processes are embedded in a spatio-temporal hierarchy. The book brings together many different aspects of environmental fate modelling of pesticides comprising such diverse subjects as, e.g., compartment theory, nonlinear biological degradation models, modelling toxicity, parameter identification, coupling of physical and biological processes, pedotransfer functions, translation of models across scales, coupling geographical information systems with models, and FUZZY-approaches.

Download or read book Modeling Microbial Responses in Food written by Robin C. McKellar and published by CRC Press. This book was released on 2003-12-29 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first state-of-the-art review of this dynamic field in a decade, Modeling Microbial Responses in Foods provides the latest information on techniques in mathematical modeling of microbial growth and survival. The comprehensive coverage includes basic approaches such as improvements in the development of primary and secondary models, statistical

Download or read book Physiological Models in Microbiology written by M. Bazin and published by CRC Press. This book was released on 2018-01-18 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physiological Models in Microbiology consists of two volumes. Volume I considers models of basic growth processes and the effects of environmental factors on microbial growth. Volume II describes models of secondary processes, in particular, microbial death, spore germination, chemotaxis, and surface growth.

Download or read book Biogeochemical Cycles written by Katerina Dontsova and published by John Wiley & Sons. This book was released on 2020-04-14 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elements move through Earth's critical zone along interconnected pathways that are strongly influenced by fluctuations in water and energy. The biogeochemical cycling of elements is inextricably linked to changes in climate and ecological disturbances, both natural and man-made. Biogeochemical Cycles: Ecological Drivers and Environmental Impact examines the influences and effects of biogeochemical elemental cycles in different ecosystems in the critical zone. Volume highlights include: Impact of global change on the biogeochemical functioning of diverse ecosystems Biological drivers of soil, rock, and mineral weathering Natural elemental sources for improving sustainability of ecosystems Links between natural ecosystems and managed agricultural systems Non-carbon elemental cycles affected by climate change Subsystems particularly vulnerable to global change The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Book Review: http://www.elementsmagazine.org/archives/e16_6/e16_6_dep_bookreview.pdf

Download or read book New Methods for Improving the Watershed Scale Modeling of In Stream Pathogen Indicator Bacteria written by Jeffrey J Iudicello and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Excessive bacteria levels are the leading cause of impairment in U.S. water bodies. This dissertation looked at the use of watershed-scale computer models to predict in-stream bacteria concentrations. The study site was the Little River Experimental Watershed (LREW) in Tifton, GA, and fecal coliform fate and transport models were built for four of the LREW catchments over the period Jan 1996 - Dec 2002. A multi-model approach was used in the study to examine the current capacity of industry-standard models and to avoid conclusions unique to a particular catchment. Three models were examined: HSPF, SWAT, and a new model based on the principles of hydrograph separation called the Characteristic Concentration (CC) model. Sensitive hydrology and water-quality parameters were identified in HSPF and SWAT and a response-surface iterative scheme was used to calibrate the sensitive parameters of the models, while a simpler calibration method was used for the 2-parameter CC model. Model performance, both hydrology and water-quality, was evaluated by the Nash-Sutcliffe statistic. The research was conducted in three substudies: an examination of the three models' performance in modeling bacteria concentrations in all four catchments, an examination in HSPF and SWAT to determine the relationship between model performance and the hydrologic state of the watershed, and an examination of model combination possibilities to further analyze model performance and provide methods for combining model output to maximize model results beyond what the individual models could achieve. The research revealed that while the hydrology components of HSPF and SWAT could be considered strong the water-quality components were not as strong. The model parameters describing in-stream bacteria processes were consistently more sensitive than parameters describing terrestrial processes of bacteria, a result that was reinforced when considering the hydrologic state of the watersheds. A Latin Hypercube analysis revealed that parameter uncertainty is significant in the models, but that structural uncertainty resulting from the model process equations is the dominant source of uncertainty in model predictions. The model combination methods were able to provide an improved set of model predictions and showed that in some cases the use of a single calibrated model may still not be the best representation of a watershed. In all cases the CC model performed comparably or better than HSPF and SWAT, and provided a new model framework for analyzing the environmental fate and transport of bacteria. The CC model is worth using in future modeling studies and may be particularly useful in model combination applications since it is comparatively much simpler to use and less data-intensive than either HSPF or SWAT.

Download or read book Predictive Microbiology written by Thomas Alexander McMeekin and published by Wiley-Blackwell. This book was released on 1993 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four authors with backgrounds in food microbiology, food chemistry, mathematics, and statistics, explain how techniques of predictive microbiology can allow an objective evaluation of the effects of processing, distribution, and storage on the microbiological safety and quality of foods. The trick is to understand the microbial ecology of a process or of a food at a particular point in the chain, then use mathematical relationships between microbial growth and the expected environmental conditions, to predict the growth or survival of selected organisms. Annotation copyright by Book News, Inc., Portland, OR

Download or read book Fate and Transport of Subsurface Pollutants written by Pankaj Kumar Gupta and published by Springer Nature. This book was released on 2020-10-20 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume offers detailed information on the behaviour of various water pollutants, and on the principles and concepts of groundwater flow and transport. It will help readers to understand and execute the planning, supervision, and review of solute transport and groundwater modeling projects. The book also discusses the role and fate of elements that have been identified as major contaminants in surface and subsurface waters, and their adverse effects on ecology and human health. The book explores this theme throughout four sections – a. Understanding Soil-Water Systems, b. Fate and Transport of Pollutants, c. Physico-Chemical Treatment of Wastewater and d. Microbial Techniques Used to Decontaminate Soil-Water Systems. Introducing readers to a range of recent advances concerning the fundamentals of subsurface water treatment, it offers a valuable guide for teachers, researchers, policymakers, and undergraduate and graduate students of hydrology, environmental microbiology, biotechnology and the environmental sciences. It also provides field engineers and industrial practitioners with essential support in the effective remediation and management of polluted sites.

Download or read book Environmental Microbiology written by Ian Pepper and published by Academic Press. This book was released on 2011-10-13 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: For microbiology and environmental microbiology courses, this leading textbook builds on the academic success of the previous edition by including a comprehensive and up-to-date discussion of environmental microbiology as a discipline that has grown in scope and interest in recent years. From environmental science and microbial ecology to topics in molecular genetics, this edition relates environmental microbiology to the work of a variety of life science, ecology, and environmental science investigators. The authors and editors have taken the care to highlight links between environmental microbiology and topics important to our changing world such as bioterrorism and national security with sections on practical issues such as bioremediation, waterborne pathogens, microbial risk assessment, and environmental biotechnology. WHY ADOPT THIS EDITION? New chapters on: Urban Environmental Microbiology Bacterial Communities in Natural Ecosystems Global Change and Microbial Infectious Disease Microorganisms and Bioterrorism Extreme Environments (emphasizing the ecology of these environments) Aquatic Environments (now devoted to its own chapter- was combined with Extreme Environments) Updates to Methodologies: Nucleic Acid -Based Methods: microarrays, phyloarrays, real-time PCR, metagomics, and comparative genomics Physiological Methods: stable isotope fingerprinting and functional genomics and proteomics-based approaches Microscopic Techniques: FISH (fluorescent in situ hybridization) and atomic force microscopy Cultural Methods: new approaches to enhanced cultivation of environmental bacteria Environmental Sample Collection and Processing: added section on air sampling

Download or read book Freshwater Microplastics written by Martin Wagner and published by Springer. This book was released on 2017-11-21 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. This volume focuses on microscopic plastic debris, also referred to as microplastics, which have been detected in aquatic environments around the globe and have accordingly raised serious concerns. The book explores whether microplastics represent emerging contaminants in freshwater systems, an area that remains underrepresented to date. Given the complexity of the issue, the book covers the current state-of-research on microplastics in rivers and lakes, including analytical aspects, environmental concentrations and sources, modelling approaches, interactions with biota, and ecological implications. To provide a broader perspective, the book also discusses lessons learned from nanomaterials and the implications of plastic debris for regulation, politics, economy, and society. In a research field that is rapidly evolving, it offers a solid overview for environmental chemists, engineers, and toxicologists, as well as water managers and policy-makers.

Download or read book Microbiomes of the Built Environment written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-10-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: People's desire to understand the environments in which they live is a natural one. People spend most of their time in spaces and structures designed, built, and managed by humans, and it is estimated that people in developed countries now spend 90 percent of their lives indoors. As people move from homes to workplaces, traveling in cars and on transit systems, microorganisms are continually with and around them. The human-associated microbes that are shed, along with the human behaviors that affect their transport and removal, make significant contributions to the diversity of the indoor microbiome. The characteristics of "healthy" indoor environments cannot yet be defined, nor do microbial, clinical, and building researchers yet understand how to modify features of indoor environmentsâ€"such as building ventilation systems and the chemistry of building materialsâ€"in ways that would have predictable impacts on microbial communities to promote health and prevent disease. The factors that affect the environments within buildings, the ways in which building characteristics influence the composition and function of indoor microbial communities, and the ways in which these microbial communities relate to human health and well-being are extraordinarily complex and can be explored only as a dynamic, interconnected ecosystem by engaging the fields of microbial biology and ecology, chemistry, building science, and human physiology. This report reviews what is known about the intersection of these disciplines, and how new tools may facilitate advances in understanding the ecosystem of built environments, indoor microbiomes, and effects on human health and well-being. It offers a research agenda to generate the information needed so that stakeholders with an interest in understanding the impacts of built environments will be able to make more informed decisions.

Download or read book Modeling the Metabolic and Physiologic Activities of Microorganisms written by Christon J. Hurst and published by . This book was released on 1992-09-17 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes methods for formulating models of the metabolic and physiological processes of microorganisms from a mathematical perspective. The models used--biodegradation, individual cellular functions and environmental cycles--are practical, mathematical tools that enable researchers to predict and control microorganism behavior. The focus is on their behavior in the natural environment, with mixed populations of microorganisms and heterogeneous substrates.

Download or read book Evaluation of Terrestrial Microcosms for Assessing the Fate and Effects of Genetically Engineered Microorganisms on Ecological Processes written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This project evaluates and modifies the existing US Environmental Protection Agency's Office of Pesticides and Toxic Substances (EPA/OPTS) terrestrial microcosm test system and test protocols such that they can be used to determine the environmental fate and ecological hazards of genetically engineered microorganisms (GEMs). The intact soil-core microcosm represents terrestrial ecosystems, and when coupled with appropriate test protocols, such microcosms may be appropriate to define and limit risks associated with the intentional release of GEMs. The terrestrial microcosm test system was used to investigate the survival and transport of two model GEMs (Azospirillum lipoferum and Pseudomonas sp. Tn5 mutants) to various trophic levels and niches and through intact soil cores. Subsequent effects on nutrient cycling and displacement of indigenous microorganisms were evaluated. The model organisms were a diazotrophic root-colonizing bacterium (A. lipoferum) and a wheat root growth-inhibiting rhizobacterium (Pseudomonas sp.). The transposable element Tn5 was used as a genetic marker for both microorganisms in two separate experiments. The organisms were subjected to transposon mutagenesis using a broad host-range-mobilizable suicide plasmid. The transposon Tn5 conferred levels of kanamycin resistance up to 500 .mu.g/ml (Pseudomonas sp.), which allowed for selection of the bacteria from environmental samples. The presence of Tn5 DNA in the genome of the model GEMs also allowed the use of Tn5 gene probes to confirm and enumerate the microorganisms in different samples from the microcosms. Two types of root growth-inhibiting Pseudomonas sp. Tn5 mutants were obtained and used in microcosm studies: those that lacked the ability to inhibit either wheat root growth or the growth of other microorganisms in vitro (tox/sup /minus//) and those which retained these properties (tox/sup +/). 53 refs., 7 figs., 6 tabs.

Download or read book Aquatic Toxicology and Environmental Fate written by T. M. Poston and published by ASTM International. This book was released on 1986 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Impact of Food Bioactives on Health written by Kitty Verhoeckx and published by Springer. This book was released on 2015-04-29 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Infogest” (Improving Health Properties of Food by Sharing our Knowledge on the Digestive Process) is an EU COST action/network in the domain of Food and Agriculture that will last for 4 years from April 4, 2011. Infogest aims at building an open international network of institutes undertaking multidisciplinary basic research on food digestion gathering scientists from different origins (food scientists, gut physiologists, nutritionists...). The network gathers 70 partners from academia, corresponding to a total of 29 countries. The three main scientific goals are: Identify the beneficial food components released in the gut during digestion; Support the effect of beneficial food components on human health; Promote harmonization of currently used digestion models Infogest meetings highlighted the need for a publication that would provide researchers with an insight into the advantages and disadvantages associated with the use of respective in vitro and ex vivo assays to evaluate the effects of foods and food bioactives on health. Such assays are particularly important in situations where a large number of foods/bioactives need to be screened rapidly and in a cost effective manner in order to ultimately identify lead foods/bioactives that can be the subject of in vivo assays. The book is an asset to researchers wishing to study the health benefits of their foods and food bioactives of interest and highlights which in vitro/ex vivo assays are of greatest relevance to their goals, what sort of outputs/data can be generated and, as noted above, highlight the strengths and weaknesses of the various assays. It is also an important resource for undergraduate students in the ‘food and health’ arena.

Download or read book Environmental Sustainability for Engineers and Applied Scientists written by Greg Peters and published by Cambridge University Press. This book was released on 2019-03-14 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Connects a qualitative perspective of environmental management with the quantitative skills used by engineering and applied science students.

Download or read book Physiological Models in Microbiology written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Physiological Models in Microbiology consists of two volumes. Volume I considers models of basic growth processes and the effects of environmental factors on microbial growth. Volume II describes models of secondary processes, in particular, microbial death, spore germination, chemotaxis, and surface growth."--Provided by publisher.