A5086252712- Medical Imaging Techniques and Applications
- Tea Polyphenols and Effects
- Thyroid Disorders and Treatments
- Mercury impact and mitigation studies
- Folate and B Vitamins Research
- Vitamin D Research Studies
- Iron Metabolism and Disorders
- Lanthanide and Transition Metal Complexes
- Nanoparticle-Based Drug Delivery
- Nanoparticles: synthesis and applications
- Heavy Metals in Plants
- Computational Drug Discovery Methods
- Pediatric Urology and Nephrology Studies
- DNA Repair Mechanisms
- Radioactive element chemistry and processing
- Gold and Silver Nanoparticles Synthesis and Applications
- Infectious Disease Case Reports and Treatments
- Phosphorus and nutrient management
- Kidney Stones and Urolithiasis Treatments
- Pregnancy and Medication Impact
- Venous Thromboembolism Diagnosis and Management
- Radiopharmaceutical Chemistry and Applications
- Therapeutic Uses of Natural Elements
- Food Science and Nutritional Studies
- Phytochemistry Medicinal Plant Applications
National Institute of Standards and Technology
2010-2022
NCCOS Hollings Marine Laboratory
2015-2020
Material Measurement Laboratory
2012-2019
National Institute of Standards
2019
East Tennessee State University
2014
Texas Children's Hospital
1983-1988
Baylor College of Medicine
1983-1988
St. Luke's Episcopal Hospital
1984-1988
Ben Taub Hospital
1987
The National Institute of Standards and Technology (NIST), in collaboration with the Institutes Health (NIH), has developed a Standard Reference Material (SRM) to support technology development metabolomics research. SRM 1950 Metabolites Human Plasma is intended have metabolite concentrations that are representative those found adult human plasma. plasma used preparation was collected from both male female donors, donor ethnicity targets were selected based upon ethnic makeup U.S....
Elevated mercury concentrations ([Hg]) were found in Alaskan murre (Uria spp.) eggs from the coastal embayment of Norton Sound relative to insular colonies northern Bering Sea-Bering Strait region. Stable isotopes Hg, carbon, and nitrogen measured investigate source this enrichment. Lower δ(13)C values (-23.3‰ -20.0‰) more oceanic (-20.9‰ -18.7‰) indicated that a significant terrestrial carbon was associated with elevated [Hg] Sound, implicating Yukon River smaller Seward Peninsula...
The minichromosome maintenance (MCM) proteins, a family of six conserved polypeptides found in all eukaryotes, are essential for DNA replication. archaeon Methanobacterium thermoautotrophicum ΔH contains single homologue MCM with biochemical properties similar to those the eukaryotic enzyme. amino acid sequence archaeal protein putative zinc-binding domain CX2CXnCX2C (C4) type. In this study, roles zinc finger function were examined using recombinant wild-type and mutant proteins expressed...
A sensitive liquid chromatographic (LC) method coupled with inductively plasma mass spectrometry (ICP-MS) has been developed for the determination of vitamin B12. The was based on efficient isocratic separation a mobile phase consisting 20 mmol L−1 ethylenediaminetetraacetic acid (EDTA) in 25/75 methanol–water mixture (volume fractions) operating at flow rate 0.2 mL min−1. After LC separation, ionic cobalt (Co), cyanocobalamin, methylcobalamin, and hydroxocobalamin were measured as 59Co by...
Abstract The National Institute of Standards and Technology, the U.S. Food Drug Administration, Center for Evaluation Research Safety Applied Nutrition, Institutes Health, Office Dietary Supplements, are collaborating to produce a series Standard Reference Materials (SRMs) dietary supplements. A suite ephedra materials is first in series, this paper describes acquisition, preparation, value assignment these materials: SRMs 3240 Ephedra sinica Stapf Aerial Parts, 3241 E. Native Extract, 3242...
The mini-chromosome maintenance (MCM) proteins serve as the replicative helicases in archaea and eukaryotes. Interestingly, an MCM homolog was identified, by BLAST analysis, within a phage integrated bacterium Bacillus cereus (Bc). BcMCM is only related to AAA region of MCM-helicases; typical amino-terminus missing replaced segment with weak homology primases. We show that displays 3′→5′ helicase ssDNA-stimulated ATPase activity, properties arise from its conserved domain. Isolated monomer...
Abstract Standard Reference Material 3280 Multivitamin/ Multielement Tablets was issued by the National Institute of Standards and Technology in 2009, has certified reference mass fraction values for 13 vitamins, 26 elements, two carotenoids. Elements were measured using or more analytical methods at NIST with additional data contributed collaborating laboratories. This material is expected to serve a dual purpose: provide quality assurance support database dietary supplement products means...
In collaboration with the Office of Dietary Supplements at National Institutes Health, Institute Standards and Technology issued a suite botanical matrix reference materials (RMs) Standard Reference Material® (SRM) for determination isoflavones toxic elements in kudzu dietary supplement ingredients.RM 8650 Pueraria montana var. lobata (Kudzu) Rhizome, SRM 3268 Extract, RM 8652 Kudzu-Containing Solid Oral Dosage Form were values assigned (puerarin, daidzin, daidzein), (arsenic, cadmium,...
Tuberculosis of the liver in association with generalized miliary tuberculosis is not an uncommon clinical entity. A solitary tuberculous abscess, however, rare. Two such cases, which there was no evidence extrahepatic tuberculosis, are reported. The similarities between this condition and other causes hepatic lesions discussed, particular emphasis placed on imaging patterns various diagnostic procedures.
Abstract Objectives Matrix differences among serum samples from non-pregnant and pregnant patients could bias measurements. Standard Reference Material 1949, Frozen Human Prenatal Serum, was developed to provide a quality assurance material for the measurement of hormones nutritional elements throughout pregnancy. Methods Serum women in each trimester were bottled into four levels based on pregnancy status trimester. Liquid chromatography tandem mass spectrometry (LC-MS/MS) methods applied...
The utility of upper extremity radionuclide venography (RNV) in the assessment suspected catheter-related central venous thrombosis (CRVT) was evaluated 40 patients with subclavian catheters. Twenty normal (Group A) served as controls and their venographic patterns were analyzed by using four criteria: (1) delayed tracer transit time, (2) nonuniformity flow pooling, (3) jugular reflux, (4) collateral filling. Control studies displayed no collaterals a distinguishing characteristic but...