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Questions related from Stefanus Muryanto
Our group are investigating the influence of malonic acid on CaCO3 phase changes (calcite, aragonite, vaterite). It is evident that the carboxylic acid used (up to 20.00 ppm) was able to alter...
17 June 2020 6,620 3 View
I am considering applying a two-stage exam for my undergraduate chemical engineering classes. Is the two-stage exam applicable for all types of courses, i.e.either engineering or social topic?
03 June 2019 6,991 1 View
Precipitation of calcium carbonate yields at least three different crystalline phases: vaterite, aragonite, and calcite. New/non-classical nucleation theory predicts the existence of kind of...
29 April 2019 2,219 1 View
Malonic acid was utilized to inhibit the precipitation kinetics of calcium carbonates. It was found that higher malonic acid concentrations added into the precipitating CaCO3 solution resulted in...
23 September 2018 4,399 0 View
An undergraduate student is completing her project on organosolv pulping using ethanol, under my direct supervision. She is struggling with the material balance since the reaction equation of...
22 July 2018 2,502 4 View
I supervised one undergraduate student investigating the synthesis of AgNPs using extracts of Piper betle leaves as reducing/capping agents. The UV-vis spectra turned out as depicted in the...
03 June 2018 6,251 0 View
I teach Process Equipment Design and use Coulson & Richardson’s Chemical Engineering Series, 4th Ed., vol 6 by R.K.Sinnott as one of the textbooks. One of my students is very keen to comment...
17 December 2017 7,925 4 View
We are investigating the hydrophobicity of modified CaCO3 nanocrystals. Is there any practical and simple way to measure the contact angle?
24 November 2017 7,782 22 View
I am looking for papers on the use of reports and port-folios as teaching and learning tools. Are they effective?
01 May 2017 8,518 3 View
We are considering integrating the concept of Green Chemistry and Green Engineering into our chemical engineering undergraduate curriculum. This integration, we think, will be as early as for...
14 December 2014 3,934 12 View
I am considering proposing that TRANSPORT PHENOMENA be removed from chemical engineering undergraduate curiculum. This subject is more appropriate for graduate levels, because it is heavily...
18 January 2014 9,265 24 View
If there is a simpler, perhaps traditional technique for this CSD measurement; it could be useful for lower-divison laboratory in chemical engineering.
10 April 2013 8,957 2 View
Is there any constraint toward the implementation of birth control? For example, due to the opinion that such policy may contradict the human right issues? Look forward to hearing your...
01 January 1970 9,606 7 View
