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All Journal Jurnal Rekayasa Proses Reaktor International Journal of Renewable Energy Development Eksergi: Chemical Engineering Journal Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences KOVALEN: Jurnal Riset Kimia Jurnal Fitofarmaka Indonesia Mesin Chemistry Indonesian Journal of Chemical Research CHEESA: Chemical Engineering Research Articles Jurnal Rekayasa Proses JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Teknik Kimia Indonesia International Journal of Renewable Energy Development Jurnal Rekayasa Proses International Journal of Oil Palm Biodiversitas Journal of Biological Diversity Nusantara Bioscience
Johnner P Sitompul
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Synthesis of Nanocomposite Materials for Biodegradable Food Packaging Johnner Parningotan Sitompul; Daru Setyawan; Aldhita Graffi Nabila; Vita Wonoputri; Hyung Woo Lee
International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v2i1.22

Abstract

This paper concerns on synthesis of nancomposite materials, based on poly(D,Llactic acid)/poly(L-lactic acid). The Poly(L,D-lactic acid) (PDLLA) was produced from L,Dlactic acid through direct polycondensation method and poly(L-lactic acid) (PLLA) derived from L-lactide through ring-opening polymerization method. The PDLLA/PLLA films were produced through solvent casting method. The ratio of PDLLA in the PDLLA/PLLA matrix was determined by adjusting PDLLA fraction. The nanoclay used in this experiment were natural clay (Bentonite) and modified organoclay with quaternary ammonium salt (Cloisite 30B). The PLA blend nanocomposites was produced through solution intercalation with sonication. To determine the effect of amounts of nanoclay and sonication period, these two variable were varied. To analyze chemical structure of PLA, the PLA blend film were tested using Fourier Transform Infrared (FTIR). The dispersion of nanoclay on the PLA blend matrix was analyzed using X-Ray Diffraction (XRD) test. The properties of PLA blend nanocomposites film were then characterized using Universal Testing Machine (UTM), Water Vapor Permeability (WVP) test and the enzymatic biodegradability test. The fraction of PDLLA on the PLA blend was fixed 70 % wt. XRD test showed exfoliation of Cloisite 30B in the PLA matrix while the Bentonite was exfoliated as well as intercalated. The addition of nanoclay improved the tensile strength of PLA blend nanocomposites polymer to the number of 56.26 MPa and 37.65 MPa, respectively. Sonication period of PDLLA/PLLA nanocomposite affected the mechanical properties, barrier properties and polymer biodegradability. Moreover, from the WVP test, the barrier properties of the blend polymers was improved and increased twice compared to that of the pure PDLLA/PLLA.
Produksi Asam Laktat Melalui Jalur Biologi dan Jalur Kimia Katalitik Menggunakan Berbagai Bahan Baku Aini, Apsari Puspita; Nurmalasari, Enny; Rasrendra, Carolus Borromeus; Sitompul, Johnner
Eksergi Vol 20 No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.9768

Abstract

Aplikasi asam laktat pada berbagai industri menarik minat para peneliti untuk memproduksi asam laktat melalui berbagai jalur reaksi. Perolehan isomer asam lakat yang lebih murni dibandingkan dengan jalur reaksi kimia katalitik menjadikan jalur biologi dengan fermentasi menjadi jalur reaksi yang banyak dipakai di industri. Berbagai mikroorganisme pada golongan Lactic Acid Bacteria telah digunakan untuk memproduksi asam laktat baik dalam skala laboratorium maupun skala industri. Berbagai bahan baku dapat dikonversi menjadi asam laktat seperti, dihidroksi aseton, gliseraldehid, piruvaldehid, xilosa, glukosa, fruktosa, sukrosa, selulosa, insulin, selobiosa, pati, levoglukosan dan lignoselulosa. Kemampuan katalis dalam metode kimiawi menarik banyak minat peneliti untuk mencari alternatif pembuatan asam laktat yang bisa mengkonversi gula menjadi asam laktat dengan waktu reaksi yang lebih singkat. Penggunaan berbagai katalis mulai dari katalis homogen dan heterogen terbukti dapat menghasilkan asam laktat dengan yield yang bervariasi. Katalis lanthanum triflate terlihat menghasilkan asam laktat dengan perolehan yang baik walaupun dari bahan baku lignoselulosa yang perlu perlakuan awal terlebih dahulu karena mempunyai senyawa lignin yang bisa menghalangi kerja katalis.Kata Kunci: asam laktat; kimia katalitik; fermentasi; lignoselulosa  ABSTRACT: The utilization of lactic acid for various applications encourages researchers to produce lactic acid by various reaction pathways. The yield of lactic acid isomer which is purer than the catalytic chemical reaction makes the biological pathway by fermentation widely used in industry. Various microorganisms in the Lactic Acid Bacteria categories have been used to produce lactic acid both on a laboratory and industrial scale. Various raw materials can be converted into lactic acid such as dihydroxy acetone, glyceraldehyde, pyruvaldehyde, xylose, glucose, fructose, sucrose, cellulose, insulin, cellobiose, starch, levoglucosan and lignocellulose. The ability of catalyst has attracted interest of researcher to find alternatives for making lactic acid that can convert sugar into lactic acid with a shorter reaction time. The use of various catalysts from homogeneous and heterogeneous catalysts has been proven to produce lactic acid with varying results. The lanthanum triflate catalyst proven to produce lactic acid with a high yield, even though it is from lignocellulosic raw materials that need pre-treatment to remove lignin compounds which can inhibit the performance of the catalyst.Keywords: lactic acid; chemical catalytic; fermentation;  lignocellulose  
Characterization of Biocomposites from Polylactic Acid and Cellulose of Oil Palm Empty Fruit Bunch Tika Paramitha; Johnner P Sitompul
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 3 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i3.39212

Abstract

Biocomposites are polymers reinforced with natural fibers, such as cellulose. This research aims to synthesize cellulose from Oil Palm Empty Fruit Bunch (OPEFB) and biocomposites from PLA and cellulose. In this study, cellulose was obtained through alkalization, hydrolysis, and bleaching of OPEFB. Biocomposites production was carried out by mixing PLA and cellulose using the extrusion method. In the extrusion method, PLA and cellulose of OPEFB were mixed using an extruder above the melting point of PLA of 170°C. The output product of an extruder was then pressed using a compression moulding machine to form biocomposites. The tensile strength of biocomposites had a smaller value than pure PLA, whereas the modulus young of biocomposites with 5% by weight of cellulose had a higher value than pure PLA. The decrease in the mechanical properties of biocomposites was caused by poor adhesion between PLA and cellulose. The water absorption of biocomposites was greater than pure PLA, which was influenced by cellulose's characteristics as hydrophilic and PLA is hydrophobic. Also, the higher water absorption in biocomposites accelerated the weight loss of biodegradability.
The composition of fatty acids in several vegetable oils from Indonesia HAMIDAH RAHMAN; JOHNNER P. SITOMPUL; SURYATI TJOKRODININGRAT
Biodiversitas Journal of Biological Diversity Vol. 23 No. 4 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230452

Abstract

Abstract. Rahman H, Sitompul JP, Tjokrodiningrat S. 2022. The composition of fatty acids in several vegetable oils from Indonesia. Biodiversitas 23: 2167-2176. Fatty acids are generally incorporated into a triglyceride structure in vegetable oils and this indicates vegetable oils are a source of fatty acids. Fatty acids and triglycerides are fatty groups commonly known to have a detrimental effect on health but have an important role in terms of nutrition, health, and are also a source of industrial raw materials. Therefore, this study was conducted to identify the composition of fatty acids in several edible vegetable oils which are quite widely available in Indonesia such as coconut oil, palm kernel oil, palm oil, nutmeg oil, cinnamon oil, and canarium oil. The fatty acids profile of these vegetable oils was determined using high-performance liquid chromatography while the composition was determined by comparing the peaks in each vegetable oil with the standard fatty acids. It was discovered that all the six vegetable oils contain fatty acids with different compositions, and this signifies the availability of a complete variety of fatty acids in Indonesia. Moreover, the highest fatty acid content in coconut oil and palm kernel oil was found to be lauric acid with a concentration of 49.00% and 49.25% respectively while the contents in palm oil include palmitic acid with 44.00% and oleic acid with 41.00%. The nutmeg oil was dominated by myristic acid with 78.00%, cinnamon oil by stearic acid with 50.16%, and canarium oil by oleic acid with 51.71%. Furthermore, the concentration range for all the vegetable oils includes 14.66-91.20% saturated, 6.30-52.31% monounsaturated, and 1.35-33.03% polyunsaturated fatty acids. These results can be used as a source of information in the process of utilizing fatty acids and triglycerides in vegetable oils, and also provide the data required to estimate the nutritional value of the plant biodiversity originating from Indonesia.
Short communication: Effects of Canarium indicum oil in enhancing brain-derived neurotrophic factor in rats Hamidah Rahman; KUSNANDAR ANGGADIREDJA; TUTUS GUSDINAR; JOHNNER P. SITOMPUL; TURSINO TURSINO
Nusantara Bioscience Vol. 12 No. 2 (2020)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/nusbiosci/n120213

Abstract

Abstract. Rahman H, Anggadiredja K, Gusdinar T, Sitompul JP, Tursino. 2020. Short communication: Effects of Canarium indicum oil in enhancing brain-derived neurotrophic factor in rats. Nusantara Bioscience 12: 168-174. The brain-derived neurotrophic factor (BDNF) is one of the neurotrophins family and plays an essential role during the development of neurons called neurogenesis. Since BDNF is critical for the function and survival of neurons, thus it represents the neuroprotective agent which useful in preventing neurodegenerative diseases. Here, we investigated BDNF serum concentrations after feeding the canarium oil (CO) and Canarium oil-based structured triglyceride (COST) in rats. Analysis of the BDNF serum was conducted by sandwich enzyme-linked immunosorbent assay (ELISA). The results demonstrated that the CO and the COST with the main composition of unsaturated fatty acids at the sn-2 position as much as 94.92% mol may enhance BDNF serum concentrations of up to 2.66% and 21.96% compared to the normal group of rats, respectively. This finding proves that the COST has prospects as an inducer of BDNF. However, further studies should be conducted to identify the precise dosage and safety products.
Co-Authors . Widayat A.N. Istyami A.N. Istyami, A.N. A.R. Ryadin Agus Wanadri Agus Wanadri Ahn, Jung Oh Aini, Apsari Puspita Aldhita Graffi Nabila Ana Kemala Putri Jauhari Ana Kemala Putri Jauhari Angelica, Evelyn Annisa N. Shabrina Arry K. Rizky Asep Bayu Carolus Borromeus Rasrendra Carolus Borromeus Rasrendra Chrismono Himawan Daniel I. Simangunsong Daniel Prasetyo Daniel Prasetyo Daniel Prasetyo, Daniel Daru Setyawan Emanuella, Natasha Enny Nurmalasari Faiq I. Akhiroti Gun Gun Gumilar Gun Gun Gumilar Gusdinar, Tutus H. Rahman H.W. Lee H.W. Lee, H.W. HAMIDAH RAHMAN Hamidah Rahman Hamidah Rahman Hermawan Prajitno Hermawan Prajitno Hermawan Prajitno, Hermawan Hutapea, Try H. A. Hyung W. Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Hyung Woo Lee Indra G. Pasaribu Insyani, Rizky Jung Oh Ahn KUSNANDAR ANGGADIREDJA Kusnandar Anggadiredja Lee, Hyung Woo Lee, Hyung Woo Mario C. Gultom Martha Situ Situmorang Matthew W. Chang Matthew W. Chang Megawati Zunita Michael D.M. Sitompul Permata A. Priyadi Prajitno, Hermawan Prasetyo, Daniel R. Muhtadi R. Muhtadi, R. Rasrendra, Carolus Borromeus Retno G. Dewi Retno G. Dewi Riadi, Indra Rizki Insyani Rizki Insyani Rizki Insyani Rizky Insyani Simangunsong, Daniel I. SURYATI TJOKRODININGRAT Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang H. Soerawidjaja Tatang Hernas Soerawidjaja Tika Paramitha Tika Paramitha Tirto Prakoso Try H. A. Hutapea Tursino, Tursino TUTUS GUSDINAR Tutus Gusdinar Tutus Gusdinar Vita Wonoputri Vita Wonoputri Wanadri, Agus Widayat Widayat Yook Chan Kim Yook Chan Kim Yosandi Calimanto Yosandi Calimanto