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buy hydrocodone online with prescription Biochemistry Lecturer, teaching activities

hydrocodone 650 mg street value Undergraduate program - Magister program

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Post Doctoral program -

Information and facts Academic career

hydrocodone mail order canada Degree

order hydrocodone online from mexico University

excess Year

Bachelor Degree (Chemistry)          




FST Unair-Indonesia


Magister Degree (Chemistry)



Doctoral Degree (Chemistry)

RuG-The Netherlands


connected Employment Position

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Additional Period



1994-2016 Research and development projects overthelast5years

  1.  Structure determination of a 3-ketosteroid D1-dehydrogenase enzyme
  2.  Structure determination of a b-xylosidase enzyme Industry collaborations over the last 5 years

1.      2012 :  Analysis Weathering of Oil Palm Empty Fruit Bunches by Excelzyme

2.      2015-2017 : Local Excelzyme Production to Supply The Domestic Bio-Product for Agro-Industrial demand  

proceed Partners

PT Petrosida, Gresik, East Java, Indonesia

PT Stars Specialty Chemicals Indonesia, Jakarta, West java, Indonesia

Patents and proprietary rights



Teaching Materials:

  1. Production of gelatin from bone waste
  2. Biochemistry I
  3. Enzymology 
  4. Practical work of biochemistry guidance


Important publications over the last 5 years


  1. Dijkstra, B. W., van Oosterwijk, N. & Rohman, A. (2016) Structure and catalytic mechanism of 3-ketosteroid dehydrogenases. Proc Chem 18, 3-11.
  2. Hartanti, L., Rohman, A., Suwandi, A., Dijkstra, B. W., Nurahman, Z. & Puspaningsih, N. N. T. (2016) Mutation analysis of the pKa modulator residue in -D-Xylosidase from Geobacillus Thermoleovorans IT-08: Activity adaptation to alkaline and high-temperature conditions. Proc Chem 18, 39–48.
  3. Rohman, A., Van Oosterwijk, N., Thunnissen, A.-M. W. H. & Dijkstra, B. W. (2013) Crystal structure and site-directed mutagenesis of 3-ketosteroid Δ1-dehydrogenase from Rhodococcus erythropolis SQ1 explain its catalytic mechanism. J Biol Chem 288, 35559-35568.
  4. Rohman, A., van Oosterwijk, N. & Dijkstra, B. W. (2012) Purification, crystallization and preliminary X-ray crystallographic analysis of 3-ketosteroid Δ1-dehydrogenase from Rhodococcus erythropolis SQ1. Acta Crystallogr Sect F Struct Biol Cryst Commun 68, 551-556.
  5. Rohman, A., van Oosterwijk, N., Kralj, S., Dijkhuizen, L., Dijkstra, B. W. & Puspaningsih, N. N. T. (2007) Purification, crystallization and preliminary X-ray analysis of a thermostable glycoside hydrolase family 43 β-xylosidase from Geobacillus thermoleovorans IT-08. Acta Crystallogr Sect F Struct Biol Cryst Commun 63, 932-935.


Activities in specialist bodies

Organization Role