Saiyavit Varavinit's Homepage

Dr. Saiyavit Varavinit

Group : Industrial Biotechnology and Bioprocess Engineering

Contact Details :
    Room BT210 A
    Department of Biotechnology, Faculty of Science, Mahidol University
    Rama VI Road, Bangkok 10400, Thailand
    Tel : 0-2201-5315 Fax : 0-2354-7160
    E-mail : scsva@mahidol.ac.th

Education :

	1966-1970	B.Sc. Chemistry, Mahidol University, Bangkok, Thailand.
	1970-1972	M.Sc. Organic Chemistry, Mahidol University
	1972-1977	Dr. Ing. (Doctor of Chemical Engineering, Technical University Clausthal, Germany)

_{Current Academic Appointment :}
_{Associate
Professor, Faculty of Science, Mahidol University}

_{Research Interest :}
_{Starches
Properties, Characterizations and Utilizations}

_{Facilities and Analytical Experties :}
_{Starch
processing :}
_{Drying, Extrusion, Filtrations, Centrifugal separation and etc.}
_{Starch properties :}
_{Rheology, Solubility and Swelling Power, Thermal property (DSC ,Differential
Scanning Calorimetry),

IR (Infrared spectroscopy), NMR (Nuclear Magnetic
Resonance),

X-ray diffraction and GPC (Gel Permeable Chromatography) and
etc.}

_{National Professional Society :}
_{Member,
Science Society of Thailand}

Teaching :
Bioprocess Engineering (SCBT 412) , Bioprocess Engineering Lab (SCBT 413)
Chemical and Biochemical Kinetic (SCBT 315) , Food Technology (SCBT 333)
Fermentation technology(SCBT 511) , Down stream processing (SCBT 512)
Advance Bioprocess Engineering (SCBT 612) , Current topic in Bioprocess Engineering (SCBT 614 )

Publications :
International Journal

1. S. Varavinit "Amylase and Glucoamylase Production from Germinating and Early Rice Plantlets", Microbial Utilization of Renewable Resources. International Center of Cooperative Research in Biotechnology, Japan, vol. 7, 1986, page 97.

2. S. Varavinit and A. Mitrevej, "Production of Spray Dried Rice Starch and its Utilization in Pharmaceutical Industries, Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan, vol.6, 1988, page 158.

3. S. Varavinit and S. Shobsngob "Rice Malting and its Cultivation", Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan 1988., vol. 6, 1988 , page 148.

4. A. Mitrevej and S. Varavinit "Production of Modified Rice Starch and Its Utilization in Pharmaceutical Industry, Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan, vol. 6, 1988, page 153

5. S. Varavinit, M. Suphantharika, T. Yamane, T. Vichitssonthonkul, S. Tharpanawongweach and V. Meevootisom, "Use of Immobilized Cells in 6-Aminopenicillanic Acid Production", Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan, vol. 6, 1988, page 9.

6. A. Mitrevej and S. Varavinit, “Modified Rice Starch for Direct Compression.” Presented before the Industrial Pharmacy Section of the 12th Asian Congress of Pharmaceutical Science Meeting, Bali, Indonesia, Sep 1988.

7. K. Charoensiri, C. De-Eknamkul, A. Assavanig, S. Varavinit and A. Bhumiratana, "Biomass Protein Produced from Cassava Using Cephalosporium eichhorniae 152 Grown in Air-lift Fermenter", Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan, vol.7, 1990, page 330.

8. S. Shobsngob and S. Varavinit "Reduction of Sugar Loss in the Cane Sugar Mill", Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan, , vol.7, 1990, page 535.

9. Ampol Mitrevej, Saiyavit Varavinit and Nuttanan Sinchaipanid, "Comparative Evaluation of Direct Compression Fillers; Application of Spray Dried Rice Starch in Tabletting” Present Developments in Pharmaceutics and Pharmaceutical Technology, Japan, 1990, page 132.

10. W. Panbangred, S. Varavinit, T. Vichitsoomthonkul, S. Intararuangsorn and Meevootisom", Research and Development of a Biotechnological Process for 6-Aminopenicillanic Acid Production", Microbial Utilization of Renewable Resources, International Center of Cooperative Research in Biotechnology, Japan, vol.7, 1990, page 247.

11. Kachon Charoensiri, Chuanpit De-eknamkul, Apinya Assavanig, Saiyavit Varavinit and Amaret Bhumiratana, “ Biomass Protein Produced from Cassava Using Cephalosporium eichhorniae152 Grown in an Air-lift Fermentor”, Microbial Utilization of Renewable Resources, vol. 7 , 1990, page 330-335.

12. Udomvaraphant, P. Chaksangchauchot, P. Sithisarn, N. Chosungnoen, S. Varavinit, W. Panbangred, B. Panijpan and V. Meevootisom, “Penicillin Acylase : Productions, Isolation, Purification and Modification” Microbial Utilization of Renewable Resources, vol 8, 1991 page 149-153

13. S. Shobsngob, S. Varavinit and S. Mukataka, “Immobilization of Glucoamylase on Casein Coated Cotton Thread”, Annual Report of IC Biotech, vol. 16, 1993, page 400-407.

14. K. Charoensiri, C. De-Eknamkul, S. Varavinit and A. Assavanig, "Use of an Air-lift Fermenter for the Synthesis of Biomass Protein by Cephalosporium eichharniae 152 on Cassava Starch", Proceeding vol.2. Biotechnology of the Third ASEAN Science & Technology Week, Biotechnology Conference, Singapore, 1994, page 83-89.

15. K. Charoensiri, S. Varavinit, A. Bhumiratana, C. De-Eknumkul, A. Assavanig, “Production of Biomass Protein for Animal Feed from Cassava, Biotechnology for Development, Principles and Practice Relevant to Developing Countries”, Printed by the Publications Department, National Science and Technology Development Agency, Bangkok, Thailand, 1994.page 122-124.

16. T. Murugapoopathy, S. Varavinit, U. Arasaratnam and K. Balsnbramanium, “Studies on Amylolysis of Different Rice Products During a Liquefaction Process Using Thermostable Alpha-amylase”. ASEAN Journal on Science & Technology for Development, vol.12 No.1, 1995, page 43-57

17. S. Shobsngob and S. Varavinit, "Effect of Process Modification on Cane Sugar Yield", ASEAN Journal on Science & Technology for Development, vol.12, No.1, 1995, page 59-65

18. S. Varavinit, S. Shobsngob, P. Sathisnkarn, T. Suwanmongkon and S. Pongsriwat, “Improvement of Adhesion of Asphalt to the Aggregates” Proceeding of the Second International Conference on Road & Airfield Pavement Technology 27-29 September 1995, Singapore, page 156-162.

19. S. Varavinit, S. Shobsngob, P. Sathienkarn, T. Suwanmongkon and S. Pongsriwat, “Effect of Palm Stearin and Bunker Oil in Retarding of Asphalt Hardening”, paper distributed in the Second Internation Conference on Road & Airfield Pavement Technology, 27-29 September 1995, Singapore.

20. S. Varavinit, “New Industrial Products from Starch”, in Biochemical Classification of Sago Palm by Standardization of Analytical Procedure and Systematic Numbering of Zymogram, edited by Yongsak Kachonpadungkitti and Theerachai Thanananta, Department of Biotechnology, Faculty of Science and Technology, Thammasart University, 1995, page 1-18.

21. M. Suphantharika, S. Varavinit and S. Shobsngob, “Production of Autolyzed Yeast Extract as a Food Flavoring Agent”, Proceeding of International Conference on Biotechnology Research and Applications for Sustainable Development, 1995, page 219-224.

22. S. Varavinit, S. Shobsngob and M. Suphantharika “Invention of New Directly Compressible Rice Starch for the Pharmaceutical Industries”, Proceeding of International Conference on Biotechnology Research and Application for Sustainable Development, 1995, page 213-218.

23. S. Shobsngob, S. Varavinit and M. Suphantharika, “The Loss of Sugar by the Tubular Bacterial Film Fermenter System Occuring in the Cane Sugar Production Process” Proceeding of International Conference on Biotechnology Research and Applications for Sustainable Development, 1995, page 207-212.

24. S. Varavinit, J. Preechaborisutkul, S. Shobsngob, M. Suphantharika and C. De-Eknamkul, “Isolation and Characterization of New Peptide Antibiotic Produced by Bacillus Subtilis”, ASEAN Journal of Science and Technology for Development, 13 (1), 1996, page 1-17.

25. S. Varavinit and S. Shobsngob, “Bakery Technology of Rice Flour”, Food and Food Ingredients Journal of Japan, No. 168, 1996, page 78-82.

26. S. Varavinit and S. Shobsngob, “Investigation of Small Scale Separation of Banana Starch”, Food and Food Ingredients Journal of Japan, No. 169, 1996 page 112-115.

27. T. Murugapoopathy and S. Varavinit, “Optimizing Adsorption of alpha-Amylase on Broken Rice for Enzyme Recycling in DE 40 Syrup Production”, Food and Food Ingredients Journal of Japan, No. 170, 1996, page 96-101.

28. S. Varavinit, P. Srithongkum, C. De-Eknamkul, A. Assavanig and K. Charoensiri, “Production of Single Cell Protein from Cassava Starch in Air-lift Fermenter by Cephalosporium eichhorniae, Starch/Staerke, Vol. 48, 1996, No. 10, page 379-382.

29. T. Murugapoopathy and S. Varavinit, “Enzyme Stabilizing and Recycling in Dextrinization of Corn Starch, J. ISSAAS vol. 2, 1996, page 43-53.

30 Saiyavit Varavinit, Sujin Shobsngob and Tanit Nuyim, “Colour Improvement of Thai Sago Starch prior to further Modification or Utilizations”, Sago Communication vol. 7, 1996, page 34-39.

31 S. Varavinit, M. Suphantharika and S. Shobsngob, “ Formation of Meat Like Aroma from Tapioca Starch” , ICBiotech , vol.19, 1996, page 348-351.

32 S. Varavinit, P. Luangpituksa, T. Nuyim and S. Shobsngob, “ Sago Starch Modification for the Pharmaceutical Industries” ICBiotech vol.19,1996, page 351-357.

33 S. Varavinit , C. Hanswasdi and S. Shobsngob, “ Synthetic Dietary Fiber Produced from Jasmine Rice Starch”, ICBiotech vol.19,1996, page 358-366.

34 S. Varavinit, C. Hanswasdi and S. Shobsngob , “ Preparation of Dietary Fiber from the Reaction of Rice Starch with Sodium trimetaphosphate and Sodium tripolyphosphate” ICBiotech vol.19,1996,page 367-376.

35 S. Sirisansaneeyakul, T. Pornokdeetewaku, P. Luangpituksa and S.Varavinit “ Production of Cyclodextrin Glycosyltransferase from Bacillus sp”, ICBiotech, vol.19, 1996,page 377-383.

36. P. Luangpituksa, S. Shobsngob and S. Varavinit, “Pilot Scale Production and Characterization of High Dietary Fiber Taro-Imo Flour”, Food and Food Ingredients Journal of Japan. No. 171, 1997, page 118-123.

37. S. Varavinit, V. Sanguanpong and S. Shobsngob, “Isolation from Starch Waste and Partial Characterization of New Cyclodextrin Glycosyl Transferase Producing Bacillus sp”. Food and Food Ingredient Japan Journal of Japan, No. 173, 1997, page 84-90.

38. Manop Suphantharika, S. Varavinit and Sujin Shobsngob, “Determination of Optimum Conditions for Autolyzed Yeast Extract Production” ASEAN J. Science and Technology for Development 14(1), 1997, page 21-28.

39. S. Varavinit, Sujin Shobsngob, C. Hansawasdi, Tanit Nuyim and Pairot Luangpituksa, “Preparation and Characterization of Dietary Fiber from Cross-linked Sago-Starch Through Cross-linking Reaction”, Sago Communication, 1997 page 45-52.

40. Murugapoopathy and S. Varavinit “Rice Syrup Clarification Process with Filter Aid Regeneration and Recycling” ASEAN J. Science and Technology for Development 14 (1), 1997, page 1-20.

41 S.Varavinit, P.Luangpituksa and S. Shobsngob “ Small Scale Production of Sago Starch” ICBiotech, vol.20, 1997,page 381-387.

42 S. Varavinit, C. Hanswasdi and S. Shobsngob “ Thermal Characteristics of Dietary Fiber Produced by Cross-linking of Rice Starch, ICBiotech, vol.20, 1997, page 388-394.

43. S. Varavinit, C. Hanswasdi and S. Shobsngob” Preparation of Dietary Fiber from Glutinous Rice Starch” , ICBiotech, vol.20, 1997, page 395-402.

44. S. Varavinit, C. Hansawasdi and S. Shobsngob, “Preparation of Dietary Fiber from Amylose Rice Starch”, Food and Food Ingredient Journal of Japan No. 175, 1998. page 99-104.

45. S. Varavinit, V. Sanguanpong and S. Shobsngob “Utilization of Brewery Yeast Waste and Thai Glutinous Rice Starch in the Production of Cyclodextrin Glycosyl transferase”, Food and Food Ingredient Journal of Japan No. 176, 1998. page 76-88.

46. S. Varavinit, S. Shobsngob and M. Suphantharika “Affinity Flocculation of Yeast Cell Debris by Cationic Polymer and Calcium Oxide” Food and Food Ingredient Journal of Japan No. 177, 1998, page 85-89.

47. S. Varavinit, V. Sanguanpong and S. Shobsngob “Properties of Cyclodextrin Glycosyl transferase Immobilized in Alginate Salt Coated on Cotton Thread” Food and Food Ingredient Journal of Japan No. 178, 1998, page 79-86.

48. Manop Suphantharika, Wanpen Petmaneelumka, Saiyavit Varavinit and Sujin Shobsngob, “Preparation of Encapsulating Agents from Tapioca Starch”, ASEAN J. Science Technology for Development 15(2) 1998, 1-11.

49. Saiyavit Varavinit, Tanit Nuyim and Sujin Shobsngob, “Utilization of Acid Modified Sago Starch for Phamaceutical Industries” Sago Communication, vol 9, No.1, March (1998) page 1-5.

50. Saiyavit Varavinit, Chanida Hansawasdi and Sujin Shobsngob, “Physico-Chemical Properties of Rice Starch before and after Gamma-Ray Irradiation” Food and Food Ingredients Journal of Japan, No. 179, 1999, page 67-71.

51 Manop Suphantharika, Saiyavit Varavinit and Sujin Shobsngob, “Production of Yeast Extract Containing Hydrolyzed Non-yeast Protein” Food and Food Ingredients Journal of Japan, No. 181, 1999, page 70-75.

52 Saiyavit Varavinit, Chanida Hanswasdi and Sujin Shobsngob, “ Comparative Study of the Thermal Characteristics of Cross-linked Starch from Different Varieties of Rice” Food and food Ingredients Journal of Japan, No. 183,1999, page 57-61.

53 Saiyavit Varavinit, Sujin Shobsngob, Piroj Luangpituksa and Tanit Nuyim, “ Study of a Pilot Scale Production Process for Sago Starch”, Sago Communication, vol. 10, No. 1 1999, page 1-6.

54. Manop Suphantharika, Saiyavit Varavinit and Sujin Shobsngob, “ Removal of Bitter Substances from Spent Brewery Yeast Extract by Solvent Extraction” ASEAN Journal of Science and Technology for Development, vol. 16(No.2), 1999, page 11-18

55. Saiyavit Varavinit , Piroj Luangpituksa, Sujin Shobsngob and Tanit Nuyim, “ Modifications and Utilizations of Sago Starch”, Biotechnology for Sustainable Utilization of Biological Resources in the Tropics, International Center for Biotechnology, Osaka, Japan, vol.14, 1999, page 36-48.

56. Varatus Wongsuragrai, Aupakit Wongsuragrai and Saiyavit Varavinit, “Sperically Agglomerated Starches with Silicon Dioxide” US Patent Number 5,888,548. Mar. 30, 1999.

57. Saiyavit Varavinit and Sujin Shobsngob “ Comparative Properties of Cake from Wheat Flour and Rice Flour” Eur Food Res Technol, vol. 211, No.2, 2000,page 117-120.

58. Saiyavit Varavinit , Surangrak Anuntavuttikul and Sujin Shobsngob, "Freezing and Thawing Techniques on Stability of Sago and Tapioca Starch Pastes” Starch/Staerke, vol.52, 2000, page 214-217.

59. Hatairat Puchongkavarin, Sujin Shobsngob, Tanit Nuyim, Pairoj Luangpituksa and Saiyavit Varavinit “ Production of Alkaline Noodles Produced from the Partial Substitution of Wheat Flour with Sago Starch” Sago Communication vol. 11 No. 1,2000, page 7-14.

60. P. Chatakanonda, S. Varavinit and P. Chinachoti “ Relationship of Gelatinization and Recrystallization of Cross-linked Rice to Glass Transition Temperature” Cereal Chem. vol. 77, 2000, page 315-319.

61. Napaporn Atichokeudomchai, Sujin Shobsngob and Saiyavit Varavinit, “ Morphological Properties of Acid Modified Tapioca Starch” Starch/Staerke, vol. 52, 2000, page 283-289.

62. Pathama Chatakanonda, Saiyavit Varavinit and Pavinee Chinachoti, “ Effect of Crosslinking on Thermal and Microscopic Transitions of Rice Starch” Lebensm.-Wiss. U. Technol., vol. 33 , 2000, page 276-284.

63. Saiyavit Varavinit, Sujin Shobsngob , Mate Bhidyachakorawat and Manop Suphantharika “ Production of Meat-Like Flavor” Science Asia, vol. 26, 2000, page 219-224.

64. Varatus Wongsuragrai, Aupakit Wongsuragrai and Saiyavit Varavinit, “Improvements in or Relating to Agglomeration of Starch ” European Patent EP 0 823 439 B1 , 2001.

65. S. Varavinit, N. Chaokasem and S. Shobsngob “Studies of Flavor Encapsulation by Agents Produced from Modified Sago and Tapioca Starches” Starch/Staerke, vol.53 –No. 6, 2001, page 281-287.

66. S. Varavinit , N. Chaokasem and S. Shobsngob “ Covalent Immobilization of a Glucoamylase to Bagasse Dialdehyde Cellulose” World Journal of Microbiology and Biotechnology, vol. 17(7) , 2001, page 721- 725

67. N. Atichokudomchai, S. Shobsngob, P. Chinachoti and S. Varavinit” A Study of Some Physicochemical Properties of High-Crystalline Tapioca Starch” Starch/Staerke, vol.53, 2001 , page577-581

68. S. Varavinit, S.Shobsngob, W. Varananond, P. Chinachoti and O. Naivikul, “Freezing and Thawing Conditions Affect the Gel Stability of Different Varieties of Rice Flour” Starch/Staerke, vol.54, 2002, page31-36

69. N. Atichokudomchai, S. Varavinit, and P. Chinachoti “Gelatinized Transition of Acid Modified Tapioca Starches by Differential Scanning Calorimeter (DSC)”, Starch/Staerke, vol. 54, 2002, page 296-302

70. N. Atichokudomchai, S. Varavinit, and P. Chinachoti “ A Study of Annealing and Freeze-Thaw Stability of Acid Modified Tapioca Starches by Differential Scanning Calorimeter(DSC)”, Starch/Staerke, vol. 54, 2002, page 343-349

71. Saiyavit Varavinit, Narisa Chaokasem, and Sujin Shobsngob “ Immobilization of a Thermostable alpha-Amylase ” , Science Asia, vol. 28, No.3, 2002, page 247-251

72. Saiyavit Varavinit and Napaporn Atichokudomchai “Characterization and Utilization of Acid Modified Cross-linked Tapioca Starch for the Pharmaceutical Industry” Carbohydrate Polymer, vol. 53, 2003, page 263-270.

73. Saiyavit Varavinit, Sujin Shobsngob, Warunee Varanyanond, Pavinee Chinachoti and Onanong Naivikul “ Effect of Amylose Content on Gelatinization, Retrogradation and Pasting Properties of Different Cultivars of Thai Rice” Starch/Staerke, vol 55, No.9, 2003 page 410-415.

74. Hatairat Puchongkavarin, Saiyavit Varavinit, Wolfgang Bergthaller “Characterization and Utilization of Acid-Modified Rice Starches for Use in Pharmaceutical Tablet Compression ” Starch/Staerke, vol.55, No.10, 2003, page 464-475.

75. Napaporn Atichokudomchai, Saiyavit Varavinit , Pavinee Chinachoti “A study of ordered structure in acid-modified tapioca starch by ¹³C CP/MAS solid-state NMR ” Carbohydrate Polymer ” vol.58, Issue 4 , 2004, pages 383-389

76. Rungtiwa Wongsagonsup, Sujin Shobsngob,Bovornlak Oonkhanond, Saiyavit Varavinit “ Zeta Potential and Pasting Properties of Phosphorylated and Crosslinked Rice Starches” Starch/ Staerke,vol.57 ,2005, page 32-37.

77. Rungtiwa Wongsagonsup, Sujin Shobsngob,Bovornlak Oonkhanond, Saiyavit Varavinit “ Zeta Potential Analysis for the Determination of Protein Content in Rice Flour ” Starch/ Staerke,vol.57 ,2005, page 25-31.

78. Rungtiwa Wongsagonsup, Sujin Shobsngob, Saiyavit Varavinit “ Preparation and Physicochemical Properties of Dialdehyde Tapioca Starch” Starch/ Staerke, ,vol. 57,2005,page166-172.

79. Hatairat Puchongkavarin, Saiyavit Varavinit, Wolfgang Bergthaller “ Comparative Study of Pilot Scale Rice Starch Production by an Alkaline and an Enzymatic Process” Starch/ Staerke, ,vol.57, 2005, page 134-144.

80. Tuangporn Tukomane, Prakan Leerapongnun, Sujin Shobsngob, Saiyavit Varavinit, “Preparation and Characterization of Annealed-Enzymatically Hydrolyzed Tapioca Starch and the Utilization in Tableting” Starch/ Staerke, vol. 59, 2007, page 33-45.

81. C. Pukkahuta, S. Shobsngob, S. Varavinit “ Effect of Osmotic Pressure on Starch:New Method of Physical Modification of Starch” Starch/ Staerke, vol 59, 2007, page 78-90.