BACKGROUND Existing reviews identify numerous studies of the relationship between urban built environment characteristics and obesity. These reviews do not generally distinguish between cross-sectional observational studies using single equation analytical techniques and other studies that may support more robust causal inferences. More advanced analytical techniques, including the use of instr...

Mikael Kubista, TATAA Biocenter and MultiD Analyses AB, Sweden, Björn Sjögreen, Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, United States and MultiD Analyses AB, Amin Forootan, MultiD Analyses AB, Radek Sindelka and Jiri Jonák, Laboratory of Gene Expression, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic and José Manuel Andrade, D...

The chemical adsorption isotherm reveals information about the active surface of a material and has been employed for many years as a standard analytical tool for the evaluation of catalysts. Temperature-programmed reaction techniques have emerged from the 1950’s as an indispensable companion to chemisorption isotherm analyses in many areas of industry and research. This paper provides an intro...

BACKGROUND The porphyrias are a group of rare metabolic disorders whose diagnosis depends on identification of specific patterns of porphyrin precursor and porphyrin accumulation in urine, blood, and feces. Diagnostic tests for porphyria are performed by specialized laboratories in many countries. Data regarding the analytical and diagnostic performance of these laboratories are scarce. METHO...

What type of analyses are we to expect when we read a study that attempts to measure success or failure of a specific spine procedure? Most analyses are divided into descriptive and analytical statistics, which should be clearly described in the methods section of a study. Descriptive statistics are most frequently used to provide general information about the patients and factors that may be r...