contact time


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contact time

[′kän‚takt ‚tīm]
(engineering)
The length of time a substance is held in direct contact with a treating agent.
References in periodicals archive ?
In this study, a Full Factorial Design of Experiment was designed to investigate the effect of contact time, initial pH and adsorbent dosage on the removal of copper with sepiolite.
Diagnosis Process engineers have tried improving hole fill by re-profiling to increase preheat temperatures and/or contact time, but cannot get better results.
After a short beep, the subjects performed a takeoff jump, and then bounced back up five times as high as possible and with a ground contact time as short as possible.
The inoculated system is then exposed to the desired concentration of the disinfectant for the desired contact time.
The effect of operation parameters such as dosage, contact time, and temperature on phenol removal was investigated.
The product moistures decreased with either an increase in contact time or a decrease in media factor (i.e., less coal per unit weight of sieve media).
Certain color formulations of Makrolon AM2428 polycarbonate meet requirements of USP Class VI and the FDA-modified ISO 10993, Part 1 “Biological Evaluation of Medical Devices” tests with human tissue contact time of 30 days or less.
PE melts at a lower temperature than PA, and, therefore, may incorporate some fraction of clay particles during the mixing process despite the bad affinity of clay toward PE, so that the average contact time between PA and clay fillers during mixing is expected to be shorter than that for blends prepared from a masterbatch ([M.sup.ls] or [M.sup.hs]).
Sorption phenomenon was studied in detail by varying solution pH, contact time and sorbent dose.
ASMC awards one CPE unit for each 50-minute block of contact time in a subject or an activity directly related to the certified technical field.
Silicon oxide and CTAB were used as precursor and surface active agent respectively.At the end of the process, the surfactant was extracted from the MCM-41 structure at a specific temperature and MCM-41 was functionalized with organic precursor 3-aminopropyltrimethoxysilane.The adsorption experiments were conducted with 4 different adsorbents namely MCM-41, NH2-MCM-41, MCM-41 nanoparticles, NH2-MCM-41 nanoparticles and influential parameters like adsorbent dose, initial metallic ions concentration, contact time and pH of the solution were fully investigated."The removal of heavy metal ions from aqueous solutions is a challenging problem in wastewater treatment issues.
This study investigated the following: (1) What are college students' perceptions of in-class activities or the way face-to-face class contact time is used?