Daniel L. Norwood

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A method for analysis of acylcarnitines in blood at physiological concentrations has been developed. Preliminary results from umbilical cord blood and neonatal blood spotted onto Guthrie cards are encouraging. This method will detect up to at least eight inherited metabolic disorders which exhibit diagnostic acylcarnitine profiles, including medium-chain(More)
UNLABELLED Polymeric and elastomeric materials are commonly encountered in medical devices and packaging systems used to manufacture, store, deliver, and/or administer drug products. Characterizing extractables from such materials is a necessary step in establishing their suitability for use in these applications. In this study, five individual materials(More)
Following the original descriptions of patients with deficiency of medium chain acylcoenzyme A dehydrogenase (MCAD; EC (McKusick 22274) (Kolvraa et al., 1982; Stanley et al., 1983), much interest has centred on the diagnosis of this condition. Rumsby et al. (1986) proposed oral loading with phenylpropionic acid (PPA) as an in vivo(More)
Safety thresholds for chemical impurities and leachables in consumer products such as foods and drugs have helped to ensure public health while establishing scientifically sound limits for identification and risk assessment of these compounds. The Product Quality Research Institute (PQRI) Leachables and Extractables Working Group, a collaboration of(More)
The Product Quality Research Institute Leachables and Extractables Working Group includes pharmaceutical development scientists representing industry, government, and academia. The Working Group was created and constituted to address scientific and regulatory questions concerning the pharmaceutical development process for Orally Inhaled and Nasal Drug(More)
UNLABELLED The Product Quality Research Institute (PQRI) is a non-profit consortium of organizations working together to generate and share timely, relevant, and impactful information that advances drug product quality and development. The collaborative activities of PQRI participants have, in the case of orally inhaled and nasal drug products (OINDPs),(More)
UNLABELLED The structural analysis (i.e., identification) of organic chemical entities leached into drug product formulations has traditionally been accomplished with techniques involving the combination of chromatography with mass spectrometry. These include gas chromatography/mass spectrometry (GC/MS) for volatile and semi-volatile compounds, and various(More)
N-nitrosamines are chemical entities, some of which are considered to be possible human carcinogens, which can be found at trace levels in some types of foods, tobacco smoke, certain cosmetics, and certain types of rubber. N-nitrosamines are of regulatory concern as leachables in inhalation drug products, particularly metered dose inhalers, which(More)
UNLABELLED In 2006, the Product Quality Research Institute's (PQRI) Leachables and Extractables Working Group released a comprehensive and detailed recommendation document related to leachables and extractables for inhalation drug products. The document includes best pharmaceutical development practice recommendations regarding container closure/delivery(More)
A simulating leaching (migration) study was performed on a model container-closure system relevant to parenteral and ophthalmic drug products. This container-closure system consisted of a linear low-density polyethylene bottle (primary container), a polypropylene cap and an elastomeric cap liner (closure), an adhesive label (labeling), and a foil overpouch(More)