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All Journal CHEMISTRY PROGRESS Jurnal Natur Indonesia Jurnal Sains dan Teknologi Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Jurnal Penelitian Pendidikan IPA (JPPIPA) ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Jurnal Kesehatan dan Sains STIKES Griya Husada Sumbawa Rengganis Jurnal Pengabdian Masyarakat Jurnal Pijar MIPA Jurnal Pepadu
Dedy Suhendra
Program Studi Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Mataram, Jalan Majapahit No. 62, Mataram
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences Other

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Journal : Jurnal Natur Indonesia

 1 
Sintesis Asam-Asam Lemak Hidroksamik dari Minyak Kelapa Menggunakan Lipase sebagai Katalis Suhendra, Dedy; Gunawan, Erin Ryantin
Jurnal Natur Indonesia Vol 14, No 1 (2012)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (204.099 KB) | DOI: 10.31258/jnat.14.1.160-164

Abstract

Fatty hydroxamic acids (FHAs) have been successfully synthesized from coconut oil by a one-step lipase catalyzed reaction. FHAs are theacids that are based on fatty acids. Their hydrophobicity can be use for some applications such as surfactant and metal ions extraction fromaqueous media. This paper describes enzymatic synthesis of FHAs from coconut oil by reacting hydroxylamine with the substrate catalyzedby a lipase. The lipase used was Lipozyme, a commercially lipase of Mucor meihe fixed on a polymer anion exchange resin. The use ofimmobilized lipase as the catalyst for the preparation reaction provides an easy isolation of the enzyme from the products and othercomponents in the reaction mixture. In addition, it also allows the reaction to be carried out under mild conditions, which reduces thereaction’s side products. The optimum preparation conditions obtained were as follows; the reaction temperature was 30 oC, the reactiontime was 30 h, the ratio of coconut oil : lipozyme (g : g) was 29.5, and the ratio of hydroxylamine : coconut oil (mmol : mmol) was 6. Thesolvent used was hexane. The purified products were characterized by qualitative test, such as FTIR spectroscopy and HPLC.
Enzyme–Catalysed Synthesis of Palm-Based Wax Esters-A Kinetic Study Gunawan, Erin Ryantin; Basri, Mahiran; Suhendra, Dedy
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.921 KB) | DOI: 10.31258/jnat.14.1.37-41

Abstract

Wax esters are long chain esters that are derived from fatty acids and alcohols with chain lengths of 12 carbons or more. Wax esters havea wide range of application in industrial especially in cosmetics. The present work focuses on the synthesis of wax esters by alcoholysisreaction from palm oil and oleyl alcohol in hexane by lipase from Rhizomucor meihei (Lipozyme IM). Effect of various concentrations ofpalm oil and oleyl alcohol were studied to deduce the kinetics and mechanism of the reaction. The alcoholysis reaction followed Michaelis-Menten kinetics. The reaction follows a Ping-pong Bi-Bi mechanism. The maximum rate was estimated to be 6 x 10 -3 mmol/h. mg catalystand the Michaelis-Menten constant for palm oil and oleyl alcohol were 4.145 M and 6.120 M, respectively.
Co-Authors Ali Djamhuri Anggi Solehah Ariani, Dwi dhony hermanto Dhony Hermanto Dina Asnawati Dwi Ariani Emmy Yuanita Erin Ryantin G Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan I Made Aditha Jurnal Pepadu Lely Kurniawati Mahiran Basri Mahiran Basri Md. Jelas Haron Murniati Murniati Nurhidayanti . Nurlaila Agustikawati Nurlaila Agustikawati Pujana Qurba Qurba, Pujana Rizka Dhia Khalilah Bali Ryantin G, Erin Sidik Silong Siska Ayu Wulandari Siska Ayu Wulandari, Siska Ayu Sri Seno Handayani Sri Seno Handayani Sri Seno Handayani W. M. Z. Wan Yunus Yayuk Andayani