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Bacterial reporters are live, genetically engineered cells with promising application in bioanalytics. They contain genetic circuitry to produce a cellular sensing element, which detects the target compound and relays the detection to specific synthesis of so-called reporter proteins (the presence or activity of which is easy to quantify). Bioassays with bacterial reporters are a useful complement to chemical analytics because they measure biological responses rather than total chemical concentrations. Simple bacterial reporter assays may also replace more costly chemical methods as a first line sample analysis technique. Recent promising developments integrate bacterial reporter cells with ...
The true extent of prokaryote diversity, encompassing the spectrum of variability among bacteria, remains unknown. Current research efforts focus on understanding why prokaryote diversification occurs, its underlying mechanisms, and its likely impact. The dynamic nature of the prokaryotic world, and continuing advances in the technological tools available make this an important area and hence this book will appeal to a wide variety of microbiologists. Its coverage ranges from studies of prokaryotes in specialized environmental niches to broad examinations of prokaryote evolution and diversity, and the mechanisms underlying them. Topics include: bacteria of the gastrointestinal tract, unculturable organisms in the mouth and in the soil, organisms from extreme environments, the diversity of archaea and their phages, comparative genomics and the emergence of pathogens, the spread of genomic islands between clinical and environmental organisms, minimal genomes needed for life, horizontal gene transfer, phenotypic innovation, and patterns and extent of biodiversity.
This book explores the links between food and human cultural and physical evolution. Each chapter begins by summarizing the basic knowledge in the field, discusses recent research results, and confirms or challenges established concepts, inviting new insight and provoking new questions. This book catalyzes discussion between scientists working on one side in food science and on the other side in biological and biomedical research.
Does the field of evolution differ from other sciences? The author, a reviewer for a major medical journal, scrutinized hundreds of scientific references in evolutionary literature, adopting the same standards used for studies submitted for medical publication. The data show that there are two types of evolution, microevolution and macroevolution, with a clear boundary between them based upon the presence and absence of empirical evidence, respectively. The surprising results show that there is a universal disconnect between the data and the conclusions that claim to show the larger changes of macroevolution. The author reveals patterns of deviations from standard scientific methods in these...
This book is about elements that kill. Mercury, arsenic, antimony, lead, and thallium can be lethal, as many a poisoner knew too well. Emsley explores the gruesome history of these elements and those who have succumbed to them in a fascinating narrative that weaves together stories of true crime, enduring historical mysteries, tragic accidents, and the science behind it all. The colourful cast includes ancient alchemists, kings, leaders, a pope, several great musicians, and amotley crew of murderers. Among the intriguing accounts is that of the 17th century poet Sir Thomas Overbury, who survived four attempts to poison him with mercury but died when given the poison in enema form - under who...
As our understanding of mobile genetic elements continues to grow we are gaining a deeper appreciation of their importance in shaping the bacterial genome and in the properties they confer to their bacterial hosts. These include, but are by no means limited to, resistance to antibiotics, and heavy metals, toxin production and increased virulence, production of antibiotics and the ability to utilize a diverse range of metabolic substrates. We are also gaining an understanding of diversity of these elements and their interactions with each other; a property which continually complicates any attempt to classify them. We are learning more about the molecular mechanisms by which they translocate ...
Consists of proceedings of symposia organized by the International Association of Biological Standardization.