This work provides detailed coverage of the applications of proven spectometric techniques in soil science. It presents analytical approaches important in the study of pool sizes and the dynamics of macro- and micronutrients, the structure and function of soil organic matter, and the co-evolution of soils, plant communities and climate. Interdisciplinary perspectives from soil science, ecology, geology, chemistry, biogeochemistry, agronomy and physics, are offered.

A guide for scientists, pediatricians and students involved in metabolic studies in pediatric research Addresses the availability of modern analytical techniques and how to apply these techniques in metabolic studies Covers the whole range of available mass spectrometric techniques used for metabolic studies including Stable Isotope Methodology Presents the relevance of mass spectrometry and stable isotope methodology in pediatric research covering applications in Nutrition, Obesity, Metabolic Disorders, and Kidney Disorders Focuses on the interactions between nutrients and the endogenous metabolism within the body and how these factors affect the health of a growing infant

The latest of a series of publications based on workshops sponsored by the Committee on Military Nutrition Research, this book's focus on emerging technologies for nutrition research arose from a concern among scientists at the U.S. Army Research Institute of Environmental Medicine that traditional nutrition research, using standard techniques, centered more on complex issues of the maintenance or enhancement of performance, and might not be sufficiently substantive either to measure changes in performance or to predict the effects on performance of stresses soldiers commonly experience in operational environments. The committee's task was to identify and evaluate new technologies to determine whether they could help resolve important issues in military nutrition research. The book contains the committee's summary and recommendations as well as individually authored chapters based on presentations at a 1995 workshop. Other chapters cover techniques of body composition assessment, tracer techniques for the study of metabolism, ambulatory techniques for the determination of energy expenditure, molecular and cellular approaches to nutrition, the assessment of immune function, and functional and behavioral measures of nutritional status.

Methods for studying metabolism. Determination of substrate kinetics. Constant isotope infusion technique. Determination of substrate kinetics. Bolus-injection technique. Determination of substrate oxidation. Bicarbonate kinetics and natural enrichment. Priming the pool. Nonsteady state kinetics. Selection of sites for infusing isotope andj drawing samples. Specific application. Glucose metabolism. Specific application. Urea. Specific application. Fat meltabolism. Amino acids. Whole-body protein turnover. Total body water. Clinical application of stable isotopes. Analytical methods. Instrumentation. Mass spectrometry. Selected ion monitoring. Preparation of samples. Chromatography. Determination of specific radioactivity. Collection of CO2. Isotope ratio mass spectrometry techniques. Gas chromatography-mass spectrometry methods. In vivo approaches. Isotopic tracers. Advantages of stable isotopes. Biological effects. Enzymatic effects. Definition of terms. Influence of uptake on calculation of rate of appearance. Influence of pool size and complexity. Net movement of tracer and tracee. Clearance. Stable versus radioisotopes. Single-pool analysis. Bicarbonate recovery. Natural abundance of 13C. Practical consideration of performing recovery studies. Determining NaH13 CO3 infusion rate. Determining VCO2. Theory of priming dose. Priming secondary pools. Steele equation. In vivo assessment of steele equation. Glucose. Effective volume of distribution. Urea. Arterial versus central venous infusion.

Volume 3 looks at classes of biomolecules including carbohydrates, nucleic acids, and lipids. In addition, special areas of application are included, such as pharmaceuticals, natural products, isotope ratio methods for biomolecules analysis, and clinical applications. The articles are arranged under general headings for continuity and ease of access, although several of these are of interest across the various disciplines. The articles are intended to teach and therefore strive to cover basics and sufficient additional detail to bring the reader up-to-date on a given subject. Some advanced topics are also covered, either in a special section of articles or in additional reading citations.

Isotope Ratio Mass Spectrometry of Light Gas-Forming Elements explores different methods of isotope analysis, including spark, secondary ion, laser, glow discharge, and isotope ratio mass spectrometry. It explains how to evaluate the isotopic composition of light elements (H, C, N, O) in solid, liquid, and gaseous samples of organic and inorganic s