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This book presents a review of the principle approaches for visualizing DNA and RNA. Using scanning tunneling and atomic force microscopes, the three-dimensional image of the surface of nucleic acids can be seen at atomic-scale resolutions. Spreading methods provide useful details on structural features of isolated molecules, but the major constituent of living matter is water, and the cryomicroscope makes it possible to look at DNA in its aqueous environment. Genes can be detected simultaneously in situ in chromosomes using fluorescent probes, and also at the electron microscopic level. In cells, nucleic acids are localized and quantified by dyes; electron microscopy is used with cytochemical, immunocytological, nuclease, and in situ hybridization methods. The main potential applications for pathological studies are shown with particular aspects such as viral nucleic acids and in situ PCR.
The first edition of Bioactive Compounds from Natural Sources was published in a period of renewed attention to biologically active compounds of natural origin. This trend has continued and intensified—natural products are again under the spotlight, in particular for their possible pharmacological applications. Largely focusing on natural products as lead compounds in drug discovery, Bioactive Compounds from Natural Sources, Second Edition: Natural Products as Lead Compounds in Drug Discovery is actually a completely new volume containing surveys of selected recent advances in an interdisciplinary area covering chemistry of natural products, medicinal chemistry, biochemistry, and other rel...
While there is a tremendous literature on the topic of wine and health ranging back to the days of Hippocrates, it is considered that there is an unlimited variety of wine, allowing for the association of senses, nutrition, and hedonism. The history of vine and wine has lasted for at least 7000 years. Vitis represent adaptable plants, and thanks to the large variety of strains, wine is an alchemical mix with unique properties, a rich and original composition in terms of polyphenols, and well known antioxidants. This explains why wine and health are closely linked to nutrition.
As nanomaterials become increasingly present in our daily lives, pertinent questions regarding their safety arise. Nanomaterial risk assessment, as in other areas, directs much of the effort worldwide in defining guidelines that may be translated into national or international directives. Nanomaterials encompass different entities, from nanoparticles to nanostructured materials, with specific effects over cells, tissues, organisms and ecosystems depending on their biophysical characteristics. Such interactions will directly affect the impact of novel nanotechnologies. This book aims to provide the reader with a comprehensive overview of the current state of the art in nanotoxicology, featuring the most important developments and critical issues regarding the use of and exposure to nanoparticles.
This book provides an overview of the biology and biochemistry of peroxisomes, and discusses the contribution of these organelles to peroxisomal and neurodegenerative diseases. It begins with a detailed introduction to the biogenesis and metabolic functions of peroxisomes, and highlights their role in oxidative stress and in lipid metabolism such as fatty acid oxidation. The following chapters focus on the molecular and clinical aspects of peroxisomal disorders caused by defects in peroxisomal function. In particular, the biological aspects of peroxisomal biogenesis disorders such as Zellweger syndrome and Heimler syndrome are discussed. This includes their underlying genetic causes as well ...
We believe that the role of glia is the next frontier to be explored in Alzheimer’s disease research. This eBook is an update on both the current knowledge of astrocytes and microglia involvement in Alzheimer’s disease pathophysiology, and some of the techniques available to study them.
Electrospinning is a versatile and effective technique widely used to manufacture nanofibrous structures from a diversity of materials (synthetic, natural or inorganic). The electrospun nanofibrous meshes’ composition, morphology, porosity, and surface functionality support the development of advanced solutions for many biomedical applications. The Special Issue on “Electrospun Nanofibers for Biomedical Applications” assembles a set of original and highly-innovative contributions showcasing advanced devices and therapies based on or involving electrospun meshes. It comprises 13 original research papers covering topics that span from biomaterial scaffolds’ structure and functionalization, nanocomposites, antibacterial nanofibrous systems, wound dressings, monitoring devices, electrical stimulation, bone tissue engineering to first-in-human clinical trials. This publication also includes four review papers focused on drug delivery and tissue engineering applications.
This Special Issue is focused on natural polyphenols and their synthetic bioactive analogues. It is composed of one review on aza- and azo-stilbenes as bioisosteric analogs of the stilbenoid resveratrol and four original articles, including studies on synthetic (bisphenol neolignans inspired by honokiol, multicomponent synthesis of polyphenols), and natural polyphenols (polyphenols from Tamarix ramosissima and Melanoleuca styphelioides) as antiproliferative, anti-Alzheimer’s, antioxidant, antimicrobial, or anti-inflammatory agents.
Late eighteenth- and early nineteenth-century Eurocentric perceptions of natural history led to the flora and fauna of the new colony of New South Wales being viewed as deficient and inferior. The swans of the colony were black and eagles white, birds built shell-strewn avenues of sticks to cavort in and parrots walked on the ground. The mammals carried their young in a pouch and there were furred animals that laid eggs. This 'miscellany of the curious' fuelled the rage for Australian natural history amongst the upper classes of Europe, bringing income and, occasionally, fame to its collectors and documenters. On the ground, in the colony, it contributed to great change for the animals and, in some cases, extinction. In Upside Down World author Penny Olsen documents how our scientific knowledge evolved, using collectors' and naturalists' journals to enhance her stories.