The study of uranium-series (U-series) isotopes in soil and sediment materials has been proposed to quantify rates and timescales of soil production and sediment transport. Previous works have studied bulk soil or sediment material, which is a complex assemblage of primary and secondary minerals and organic compounds. However, the approach relies on the fractionation between U-series isotopes i...

OBJECTIVE This study aimed to evaluate and compare the mechanical properties of five commercial core materials using fracture toughness (FT), Knoop hardness number (KHN), diametral tensile strength (DTS), and dynamic elastic moduli (DEM). METHODS Composite material specimens were produced (Rock Core, CosmeCore, ParaCore, MultiCore Flow, and Filtek Supreme Plus). The FT test (n = 15) was perfo...

Weidlein and Reck [1], in a paper titled “A Million Years of Standards” state, “Standards are as old as man. The spoken word, perhaps the oldest standard of all, grew up with him; others slowly developed over the millenia. Standards of behavior, which may ante­ date even the language, crystallized gradually as folkways and mores, and as practices of worship.” Although we are not interested in t...

Limestone is a rock belonging to the type of sedimentary rock, formed as result natural sedimentation process. non-metallic mineral that used in various sectors, such paint industry, glass plastics, paper liming on agricultural land and also metal smelting industry. products produced by PT. Sugih Alamanugroho form calcium carbonate flour (powder) with sizes 800 1,200 mesh. Before being marketed...

The purpose of this report is to provide revised standards and guidelines for the exercise testing and training of individuals who are free from clinical manifestations of cardiovascular disease and those with known cardiovascular disease. These guidelines are intended for physicians, nurses, exercise physiologists, specialists, technologists, and other healthcare professionals involved in exer...

Reference Standards For reference standards used as primary standards for pharmaceutical quality control, stability testing and inprocess control of herbal medicinal products and respective starting materials a dossier together with a certificate of analysis must be available. In this dossier information on identity testing (e.g. by NMR, MS, IR, UV), purity testing (e.g. water content, residual...

This paper was inspired by preliminary discussions between NIST and members of the healthcare community who are impacted by the use of emerging information technology. Topics of discussion included the current state of standards work in the healthcare community, the requirements for security, information assurance and continuity-of-operations, as well as the critical need for information intero...

The most critical performance indicator for medical laboratories is the delivery of accurate test results. In any laboratory, there is always the possibility that random or systematic errors may occur and place human health and welfare at risk. Laboratory quality assurance programmes continue to drive improvements in analytical accuracy. The most rigorously scrutinised data on laboratory errors...