Whither vacuum tubes?

Types of Vacuum Tubes

Preanalytical management: serum vacuum tubes validation for routine clinical chemistry

INTRODUCTION The validation process is essential in accredited clinical laboratories. Aim of this study was to validate five kinds of serum vacuum tubes for routine clinical chemistry laboratory testing. MATERIALS AND METHODS Blood specimens from 100 volunteers in five different serum vacuum tubes (Tube I: VACUETTE, Tube II: LABOR IMPORT, Tube III: S-Monovette, Tube IV: SST and Tube V: SST II...

THRESHOLD LOGIC: FROM VACUUM TUBES TO NANOELECTRONICS Invited Paper

This paper reviews silicon implementations of threshold logic gates, covering several decades. It details numerous VLSI implementations including: capacitive (switched capacitor and floating gate with their variations), conductance/current (pseudo-nMOS, output-wired-inverters, and a plethora of solutions evolved from them), as well as many differential solutions. Nanoelectronic implementations ...

K3EDTA Vacuum Tubes Validation for Routine Hematological Testing

Background and Objective. Some in vitro diagnostic devices (e.g, blood collection vacuum tubes and syringes for blood analyses) are not validated before the quality laboratory managers decide to start using or to change the brand. Frequently, the laboratory or hospital managers select the vacuum tubes for blood collection based on cost considerations or on relevance of a brand. The aim of this ...

Whither Magnesium?

Magnesium is a chemical element with the atomic number 12, an atomic weight of 24, and the common oxidation number 12. Magnesium is an alkaline metal and the eighth most abundant element in the Earth’s crust, where it constitutes about 2% by mass, and ninth in the Universe. Magnesium is easily built up in supernova stars by the sequential addition of three helium nuclei to carbon. Magnesium ion...