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 ...

Testing Guitar Amplifier Vacuum Tubes with a Computer Controlled Data Acquisition System

While vacuum tubes have been almost completely replaced by solid state electronic devices, there are still a few applications where vacuum tubes are used. One of these is in guitar amplifiers. As there are few companies still producing new vacuum tubes, most of the tubes used in amplifiers are old. The electric guitar was invented in the early twentieth century after the advent of the vacuum tu...