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All Journal Jurnal Teknologi Industri Pertanian Jurnal Pengolahan Hasil Perikanan Indonesia JURNAL KIMIA SAINS DAN APLIKASI Jurnal Keteknikan Pertanian Agrointek Indonesian Journal of Science and Technology Jurnal Penelitian Karet JMM (Jurnal Masyarakat Mandiri) Sains Natural: Journal of Biology and Chemistry Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Automotive Experiences Journal of Mechanical Engineering, Science, and Innovation ASEAN Journal for Science and Engineering in Materials
Obie Farobie
Program Studi Teknik Industri Pertanian, Fakultas Teknologi Pertanian, Institut Pertanian Bogor
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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ISOLASI DAN ELUSIDASI SENYAWA ALKALOID DALAM BIJI MAHONI (Swietenia mahagoni Jacq) Mamay Maslahat; Helen Lusiana; Obie Farobie
JURNAL SAINS NATURAL Vol. 2 No. 1 (2012): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.122 KB) | DOI: 10.31938/jsn.v2i1.35

Abstract

Isolation and Structure Elucidation of Alkaloid Compounds of Mahoni Seed (Swietenia mahagoni Jacq)           Along with rising of the term ‘back to nature”, many people have been using traditionally medicinal plants to overcome variety of diseases. Swietenia mahagoni Jacq seeds have potency to treat various diseases including high blood diseases, diabetes, rheumatism, fever, colds, and eczema. This study aimed to isolate and identify the alkaloid compounds found in mahogany seeds (Swietenia mahagoni Jacq). This research was conducted in 3 stages, namely the sample extraction by using methanol and acetic acid, determining the best eluent by using thin-layer chromatography and column chromatography and characterization of compounds by using UV, FTIR, 1H NMR and 13C NMR spectrophotometer. The best eluent from this research was chloroform : methanol with ratio of 90:10 and 95:5. Result of phytochemical test with Mayer and Dragendorf reagent showed that crude extract of mahoni contain alkaloid compound. Results of structure elucidation with UV, FTIR, 1H NMR, and 13C was assumed that alkaloid compound contained in mahoni was 3,6,7-trimethoxy-4-methyl-1,2,3,4-tetrahydroisoquinoline.Keywords : alkaloid compounds, Swietenia mahagoni Jacq, structure elucidation, chromatoghraphy ABSTRAK          Seiring dengan meningkatnya semangat “back to nature ", banyak orang telah menggunakan tanaman obat tradisional untuk mengatasi berbagai penyakit. Biji Swietenia mahagoni Jacq berpotensi untuk mengobati berbagai penyakit termasuk penyakit darah tinggi, diabetes, rematik, demam, pilek, dan eksim. Penelitian ini bertujuan untuk mengisolasi dan mengidentifikasi senyawa alkaloid yang terdapat dalam biji mahoni (Swietenia mahagoni Jacq). Penelitian ini dilakukan dalam 3 tahap, yaitu ekstraksi sampel dengan menggunakan metanol dan asam asetat, menentukan eluen terbaik dengan menggunakan kromatografi lapis tipis dan kromatografi kolom, dan karakterisasi senyawa dengan menggunakan instrumen spektrofotometer UV, FTIR, 1H NMR dan 13C NMR, dan GC-MS. Eluen terbaik dari penelitian ini adalah kloroform: metanol dengan rasio 90:10 dan 95:5. Hasil uji fitokimia dengan pereaksi Mayer dan Dragendorf menunjukkan bahwa ekstrak kasar biji mahoni mengandung senyawa alkaloid. Hasil elusidasi struktur molekul diduga bahwa senyawa alkaloid yang terkandung dalam biji mahoni (Swietenia mahagoni Jacq) adalah 3,6,7-trimetoksi-4-metil-1,2,3,4-tetrahydroisoquinoline.Keywords : senyawa alkaloid, biji mahagoni Jacq, struktur elusidati, kromatografi
Peningkatan kesadaran sanitasi masyarakat pedesaan melalui diseminasi pembuatan sabun transparan Obie Farobie; Deden Saprudin; Shaeful Firmansyah
Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Vol 5, No 1 (2022): Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jipemas.v5i1.13822

Abstract

PENGARUH PENAMBAHAN BIOADITIF MINYAK ATSIRI PADA BAHAN BAKAR BIOSOLAR TERHADAP KINERJA MESIN DIESEL Meika Syahbana Rusli; Gilang Ramadhan; Hari Setiapraja; Obie Farobie
Jurnal Teknologi Industri Pertanian Vol. 32 No. 1 (2022): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2022.32.1.65

Abstract

B30 is a blend of 30% biodiesel produced from the transesterification process of vegetable oils and 70% diesel derived from fossil fuels. The use of biodiesel is still facing the problems such as high particulate value, water content, and reduced filter life, so it is necessary to improve the fuel-containing biodiesel with bio-additives. This study aimed to determine the effect of bio-additive addition on the characteristics of B30, performance and exhaust emissions of diesel engines, and to determine the best formula from two types of formulas, namely bio additive A (a mixture of turpentine oil, clove terpenes, and citronella) and bio additive B (a mixture of turpentine oil, clove terpene, and rhodinol). The concentration of bio-additive used in the engine performance test was 0.1%. The experimental data was then analyzed using descriptive analysis and one-way ANOVA on the 95% level of characterization testing. The best formula was found in formula B based on the performance test analysis, which increased the torque and power values by 18.09–24.58 Nm and 3.85–5.04 KW, respectively. Furthermore, fuel consumption increased in the bio-additive A by 1,238–1,546 mL/hour and bio-additive B by 1,215 – 1,515 mL/hour. Intriguingly, the CO2 and NOx emissions values decreased by 6–17.6% and 337–1,205 ppm, respectively. Nevertheless, it was observed that the smoke number increased by 2.85 – 6, 45 FSN in bio-additive B. Keywords: B30, biodiesel, bio-additive; diesel engine; essential oil
Kompatibilitas Nanokristal Selulosa Termodifikasi Setrimonium Klorida (CTAC) dalam Matriks Poliasam Laktat sebagai Material Pengemas Nina Hartati; Tetty Kemala; Komar Sutriah; Obie Farobie
Jurnal Kimia Sains dan Aplikasi Vol 22, No 4 (2019): Volume 22 Issue 4 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2700.326 KB) | DOI: 10.14710/jksa.22.4.157-163

Abstract

Pertumbuhan jumlah penduduk meningkatkan konsumsi plastik nonbiodegradable yang menyebabkan penumpukan sampah. Pengalihan bahan plastik dari yang tidak dapat terurai dengan plastik yang mudah terurai penting dilakukan. PLA merupakan polimer plastik yang mudah terurai namun bersifat rapuh. Limbah industri minyak kelapa sawit yang berupa tandan kosong kelapa sawit memiliki potensi sebagai reinforcement material karena kandungan selulosanya sebesar 30-40%. Perkecilan ukuran menjadi skala nano akan meningkatkan luas permukaan dan kemampuan dispersi selulosa ke dalam matriks PLA, sehingga meningkatkan kompatibilitas ditinjau dari sifat mekanik dan morfologi permukaan pada kompositnya. Hidrolisis asam kuat selulosa dan sentrifugasi pada kecepatan 5000 rpm berhasil mendapatkan nanokristal selulosa dengan persen kristalin sebesar %. Ultrasonikasi nanoselulosa kristalin menghasilkan partikel dengan diameter rerata 7,967 nm. CTAC sebagai agen solubilizer dan pemodifikasi permukaan berhasil membentuk interaksi dengan nanokristal selulosa yang terekam pada bilangan gelombang 2850 cm-1, 2960 cm-1 dan 720 cm-1. Nanokristal selulosa yang dimodifikasi CTAC membentuk komposit CNCs-PLA dengan sifat mekanik yang lebih baik dari PLA murni. Pada jumlah CTAC tetap 0,2 mol, sifat mekanik komposit CNC-PLA terbaik diperoleh pada komposisi rasio 90 : 10 dengan kekuatan tarik 26,295 MPa, perpanjangan putus 68,18%, dan keteguhan tarik 0,387 Gpa. Semakin besar konsentrasi CTAC yang memodifikasi nanokristal selulosa, semakin rendah nilai kekuatan tarik dan perpanjangan putusnya. Hasil karakterisasi morfologi permukaan, menunjukkan adanya degradasi pada permukaan PLA yang menyebabkan penurunan sifat mekanik komposit tersebut.
Statistical Analysis of Effect of pH Treatment on Biohydrogen Production from POME Waste Junita Tarigan; Armansyah Halomoan Tambunan; Radite Praeko Agus Setiawan; Obie Farobie; Furqon
Jurnal Keteknikan Pertanian Vol. 10 No. 3 (2022): Desember 2022
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.010.3.319-327

Abstract

Palm Oil Mill Effluent (POME) has the potency to be converted to biohydrogen by dark fermentation. The statistical approach was used to determine the relationship between pH and biohydrogen production. This study aims to investigate the effect of pH on biohydrogen production with a statistical approach. Three substrates were treated with neutral pH and three without pH treatment. This experiment used the trapezoidal numerical integration method to get the total production of H2 produced per measurement time interval. There are nine substrate combinations tested. Three tests concluded that there was no difference in hydrogen production due to the pH treatment, and the sixth test concluded that there was a difference in hydrogen production due to the influence of pH. The tendency of every substrate to influence biohydrogen production without pH treatment and with pH treatment is a polynomial degree 3.
Artificial Neural Network Approach to Predict Biodiesel Production in Supercritical tert-Butyl Methyl Ether Obie Farobie; Nur Hasanah
Indonesian Journal of Science and Technology Vol 1, No 1 (2016): IJoST: VOLUME 1, ISSUE 1, April 2016
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v1i1.2218

Abstract

In this study, for the first time artificial neural network was used to predict biodiesel yield in supercritical tert-butyl methyl ether (MTBE). The experimental data of biodiesel yield conducted by varying four input factors (i.e. temperature, pressure, oil-to-MTBE molar ratio, and reaction time) were used to elucidate artificial neural network model in order to predict biodiesel yield. The main goal of this study was to assess how accurately this artificial neural network model to predict biodiesel yield conducted under supercritical MTBE condition. The result shows that artificial neural network is a powerful tool for modeling and predicting biodiesel yield conducted under supercritical MTBE condition that was proven by a high value of coefficient of determination (R) of 0.9969, 0.9899, and 0.9658 for training, validation, and testing, respectively. Using this approach, the highest biodiesel yield was determined of 0.93 mol/mol (corresponding to the actual biodiesel yield of 0.94 mol/mol) that was achieved at 400 °C, under the reactor pressure of 10 MPa, oil-to-MTBE molar ratio of 1:40 within 15 min of reaction time.
KARAKTERISTIK SUKROSA ESTER DARI METIL MIRISTAT MENGGUNAKAN KATALIS K2CO3 dan Na2CO3 Rahmadanis Rahmadanis; Erliza Hambali; Obie Farobie
Jurnal Teknologi Industri Pertanian Vol. 33 No. 2 (2023): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2023.33.2.188

Abstract

Sucrose ester is a renewable raw material that is environmentally friendly, non-toxic, biocompatible, and biodegradable with emulsification, stabilizing, and conditioning characteristics, so it is widely used in emulsion product applications. This study aims to characteristics the sucrose ester from methyl Myristic using K2CO3 and Na2CO3 as catalysts. The synthesis of sucrose ester uses methyl Myristic, which is a renewable raw material. Synthesis of methyl myristic was carried out by the esterification method, the synthesis of sucrose ester was carried out by the transesterification method with free solvent, the catalyst used was alkaline K2CO3 and Na2CO3 (6%), the reaction was carried out at 60°C for 30 minutes then 110°C for 90 minutes. The analyzes carried out were FTIR, HPLC, pH, foam stability, emulsion stability, surface tension, interfacial tension, contact angle, particle size, and polydispersity index. The results showed the characteristics of sucrose ester using K2CO3 were better than Na2CO3. The resulting characteristics are the sucrose ester group present at a wave number of 1726 nm, sucrose ester content 96,87%; the pH 10.73, foam stability 88,06%, the emulsion stability 63,68%, the surface tension 29.64 cm/dyne, interfacial tension 2,96 cm/dyne, contact angle 36,85°, particle sizes in the range of 2,35-9,74 µm, and a polydispersity index value 0.412. The resulting sucrose myristate can be applied to the cleaning, personal care, and cosmetic industries Keywords: catalysts, methyl myristic, sucrose ester
Sintesis keton dari asam lemak stearat dengan katalis layered double hydroxide (LDH) Mg-Al-Cu Firman Arief Soejana; Erliza Hambali; Obie Farobie
AGROINTEK Vol 18, No 2 (2024)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v18i2.17108

Abstract

The synthesis of ketones from stearic fatty acids using the fatty acid decarboxylation method to ketones has been carried out to increase the added value of palm oil derivative products. One of the derivative products of palm oil is Crude Palm Oil which can be converted into fatty acids through the triglyceride hydrolysis process. Palm fatty acids are Indonesia's most potentially environmentally friendly raw material. This research aims to synthesize ketones from palm fatty acids using a catalyst. Ketone compounds were synthesized using a solid base catalyst as a double hydroxide layer based on Mg-Al-Cu. Identification of the presence of a C=O ketone group was carried out by testing the Fehling test, Tollens, spectrophotometer (FTIR), and computing the yield. The results showed the success of ketone synthesis using the fatty acid decarboxylation method into ketones through a test of Fehling's on stearic fatty acid ketone products. Meanwhile, in the Tollens test, there wasn't a change in the silver mirror. Furthermore, the spectrophotometer test (FTIR) showed the presence of a C=O bond or a carbonyl group at the peak wave 1707 cm-1. Ketone's synthesis produced was 95.09%.
Utilization of Bamboo Powder in The Production of Non-Asbestos Brake Pads: Computational Bibliometric Literature Review Analysis and Experiments to Support Sustainable Development Goals (SDGs) Nandiyanto, Asep Bayu Dani; Syazwany, Aisha Nadhira; Syarafah, Karina Nur; Syuhada, Themy Sabri; Ragadhita, Risti; Piantari, Erna; Farobie, Obie; Bilad, Muhammad Roil
Automotive Experiences Vol 7 No 1 (2024)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11109

Abstract

This study aims to develop asbestos-free and environmentally friendly brake pads using apus bamboo powder (Gigantochloa apus). In the experiments, bamboo powder, resin, and catalyst were used as the raw materials and varied to ensure the quality of the prepared brake pads. To analyze the performance of brake pads, the fabricated brake pads are subjected to physicochemical tests (such as microscopic tests and functional group analysis) and mechanical tests (such as puncture tests, compression tests, and friction tests). The research results showed that adjusting the composition of the raw materials allowed a change in the performance of the brake pad, including porosity, morphological structure, and mechanical properties. Indeed, the condition of the low porosity on the inside of the brake pad strategically optimizes the compression strength of the material, making this design ideal for applications that require high resistance to compression loads. This study shows the possibility of apus bamboo powder as an alternative to asbestos in the production of non-asbestos brake pads, offering a safer and environmentally friendly solution as well as giving ideas for supporting current issues in the sustainable development goals (SDGs).
Insights into the behavior and kinetics of purun tikus degradation during slow pyrolysis Farobie, Obie; Amrullah, Apip
Jurnal Keteknikan Pertanian Vol. 11 No. 3 (2023): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.011.3.390-401

Abstract

Purun tikus (Elocharis dulcis), a type of wetland biomass feedstock, is a challenge to the swamp ecosystem as it contributes to pollution in the area. Hence, integrating the use of purun tikus as a source of bioenergy, particularly in the form of bio-oil, is of the highest priority. Nevertheless, there is a lack of research on the degradation rate of purun tikus conversion to bio-oil through pyrolysis. Thus, this study aims to evaluate the rate of destruction of purun tikus in the process of conversion into bio-oil via pyrolysis. In the experiment, a batch reaction vessel was used to carry out slow pyrolysis at temperatures ranging from 300 to 500 °C, and the reaction times ranged from 60 to 120 min. By assuming a first-order process and using the Arrhenius equation, it was possible to figure out the activation energy and the preexponential factort. To determine whether purun tikus destroyed during pyrolysis, an activation energy of 43.317 kJ mol-1 and a pre-exponential factor of 0.351 s-1 were identified.
Co-Authors Abdul Ghofur Akhmad Ghiffary Budianto Andriani, Woro Apip Amrullah Apriastini, Marsiti Armansyah Halomoan Tambunan Asep Bayu Dani Nandiyanto Asron Ferdian Falaah, Asron Ferdian Bilad, M. Roil Bilad, Muhammad Roil Deden Saprudin Erliza Hambali Fachry Abda El Rahman Firman Arief Soejana Firmansyah, Shaeful Furqon Gilang Ramadhan Gunawan Rudi Cahyono Hani Handayani, Hani Hari Setiapraja Helen Lusiana Irawansyah, Herry Jamalulail, Nanda Junita Tarigan Komar Sutriah Kurniawati, Diniar Mungil Lestari, Rizka Lukmana, Wahyu Mahmud, Rizal Mamay Maslahat Maspanger, Dadi Rosadi Meika Syahbana Rusli Nafisyah, Ayu Lana Nina Hartati Nur Hasanah Pathur Razi Ansyah Piantari, Erna Prawisudha, Pandji Rachmat Subagyo Radite Praeko Agus Setiawan Ragadhita, Risti Rahmadanis Rahmadanis Rahman, Delicia Yunita Raihan, Muhammad Rizqy Romadhona Ginting Shaeful Firmansyah Sherly Hanifarianty, Sherly Sianturi, Hizkia Gunawan Parulian Swastika Praharyawan, Swastika Syarafah, Karina Nur Syazwany, Aisha Nadhira Syuhada, Themy Sabri Teguh Kurniawan Tetty Kemala Widya FATRIASARI