Encouraged by the friendly acceptance of the first edition and stimulated by
numerous requests and comments from the community of meiobenthologists,
this second edition updates my monograph on meiobenthology. The revised text
emphasizes new discoveries and developments of relevance; it has been
extended by adding chapters on meiofauna in areas not covered before, such as
the polar regions, mangroves, and hydrothermal vents.
Food analysis is the discipline dealing with the development, application and
study of analytical procedures for characterizing the properties of foods and their
constituents. These analytical procedures are used to provide information about a wide
variety of different characteristics of foods, including their composition, structure,
physicochemical properties and sensory attributes.
The absorption, distribution, metabolism, and excretion of a drug all involve its passage across cell
membranes. Mechanisms by which drugs cross membranes and the physicochemical properties of
molecules and membranes that influence this transfer are, therefore, important. The determining
characteristics of a drug are its molecular size and shape, degree of ionization, relative lipid
solubility of its ionized and nonionized forms, and its binding to tissue proteins.
Selection of chemical markers is crucial for the quality control of herbal medicines, including
authentication of genuine species, harvesting the best quality raw materials, evaluation of post-
harvesting handling, assessment of intermediates and finished products, and detection of harmful
or toxic ingredients. Ideal chemical markers should be the therapeutic components of herbal
medicines. However, for most herbal medicines, the therapeutic components have not been fully
elucidated or easily monitored.