Jack G. Saad, part of the Scientific Services group specialized in particle sizing, recently presented at the 2013 American Society of Brewing Chemists (ASBC) Conference in Tucson, AZ. The presentation, entitled “the particle size paradox,” was given before an audience of food scientists in the beverage industry.
Based on literature and conversations with attendees, particle sizing applications of interest include:
Andrew D. D’Amico, part of the scientific services group specializing in characterization by physical and chemical adsorption, recently attended the spring 2013 meeting of the American Society for Testing and Materials (ASTM) catalyst committee (D32). For this meeting, Andrew prepared material for three topics of interest: static carbon monoxide (CO) chemisorption on supported platinum on alumina catalysts, dynamic carbon monoxide pulse chemisorption on supported platinum on alumina catalysts, and dynamic acid site characterization of zeolites by propylamines. Andrew also contributed to the discussion to keep and update the current standard of terminology relating to catalysts and catalysis (D3766). Continue reading →
MicroActive 2.0 and MicroActive for 3Flex include a powerful utility for including the pore size distribution from mercury porosimetry analyses with pore size distributions calculated from gas adsorption isotherms. This new import function allows users to rapidly view micro, meso, and macro pore size distributions in one easy to use application.
Sarah Zellnitza, *, Jakob Dominik Redlinger-Pohnq, Nora Anne Urbanetza
aResearch Center Pharmaceutical Engineering GmbH, Graz/Austria
Dry Powder Inhalers (DPIs) are medical devices used for pulmonary drug delivery. The formulations used in DPIs typically consist of adhesive mixtures of the drug and a carrier. In order to reach the tiny airways of the deep lung the drug particles have to exhibit an aerodynamic diameter of 1 µm to 5 µm. Particles of this size are rather cohesive and show poor flow properties and thus poor dosing . That is why carrier based formulations, where the drug is attached to the surface of coarser carrier particles (50 µm – 200 µm) of adequate flowability, have been invented.
The Micromeritics 3Flex has the added capability to collect and display pressure & quantity adsorbed versus time measurements. Data are collected every half second. This application note is a tutorial on how to collect the data being transmitted over the Ethernet cable used for instrument communication using a client such as PuTTY or HyperTerminal. Also, it will be shown how the captured data can easily be handled using scripts created in languages such as Python.