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All Journal Jurnal Ilmu Pertanian Indonesia ACTA VETERINARIA INDONESIANA Jurnal Pengolahan Hasil Perikanan Indonesia Buletin Kimia VALENSI Jurnal Veteriner Jurnal Natur Indonesia JURNAL SAINS DAN TEKNOLOGI INDONESIA JURNAL TEKNOLOGI LINGKUNGAN Jurnal Penelitian Hasil Hutan The Journal of Pure and Applied Chemistry Research EduChemia: Jurnal Kimia dan Pendidikan Indonesian Journal of Chemistry Marinade Chemistry Indonesian Journal of Chemical Research EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Molekul: Jurnal Ilmiah Kimia Jurnal Jamu Indonesia Asian Journal of Aquatic Sciences Jurnal Penelitian Hasil Hutan Makara Journal of Science Jurnal Kedokteran Hewan Indonesian Journal of Jamu Jurnal Penelitian Hasil Hutan
Purwantiningsih Sugita
Departemen Kimia, Fakultas MIPA, IPB University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Veterinary Other

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Journal : VALENSI

 1 
Potensi Zeolit Alam Ende-NTT sebagai Katalis Transformasi Senyawa Gula Menjadi 5-Hidroksimetilfurfural (HMF) Mela Faradika; Sri Sugiarti; Purwatiningsih Sugita
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 1, May 2019
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (787.714 KB) | DOI: 10.15408/jkv.v5i1.8174

Abstract

Sintesis 5-hidroksimetilfurfural (HMF) dari senyawa gula (glukosa dan fruktosa) dengan katalis zeolit alam Ende-Nusa Tenggara Timur (NTT) menggunakan pelarut dimetil-sulfoksida (DMSO) dan metode refluks telah dilakukan. Penelitian ini bertujuan untuk melihat efektivitas zeolit alam Ende sebagai katalis transformasi senyawa gula menjadi 5-hidroksimetilfurfural (HMF). Hasil penelitian menunjukkan bahwa zeolit alam Ende tanpa aktivasi dan modifikasi (ZA), zeolit teraktivasi asam (ZAA), zeolit teraktivasi basa (ZAB), Na-zeolit teraktivasi asam (Na-ZAA), Na-zeolit teraktivasi basa (Na-ZAB), H-zeolit teraktivasi asam (H-ZAA), dan        H-zeolit teraktivasi basa (H-ZAB) memiliki potensi sebagai katalis untuk transformasi senyawa gula menjadi HMF. Rendemen yang dihasilkan untuk substrat fruktosa berkisar 43-74%, sedangkan untuk substrat glukosa berkisar 2-12%. ZAA memiliki aktivitas katalitik terbaik sebagai katalis dalam mengkonversi fruktosa menjadi HMF dengan rendemen 74.84%, sedangkan untuk substrat glukosa adalah katalis H-ZAA dengan rendemen sebesar 12.77%. Kata kunci: 5-Hidroksimetilfurfural (HMF), fruktosa, glukosa, katalis, zeolit The synthesis of 5-hydroxymethylfurfural (HMF) from sugars (glucose and fructose) with natural zeolite catalyst of Ende-Nusa Tenggara Timur (NTT) in dimethyl-sulfoxide (DMSO) using reflux method has been done. This study aims to observe the ability of natural zeolite Ende as a catalyst for the transformation of sugar compounds into HMF. According to the research, Ende natural zeolite without activation and modification (ZA), acid activation zeolite (ZAA), alkaline activation zeolite (ZAB), acid activation Na-zeolite (Na-ZAA), alkaline activation Na-zeolite (Na-ZAB), acid activation H-zeolite (H-ZAA) and alkaline activation H-zeolite (H-ZAB) have the ability to transform sugar compounds into HMF. HMF yield for fructose as a substrate was 43-74%, while those for glucose as a substrate was 2-12%. ZAA catalyst had the best catalytic activity as a catalyst in converted fructose to HMF with yield was 74.84%, while for glucose substrate was H-ZAA catalyst with yield was 12.77%. Keywords: 5-Hydroxymethylfurfural (HMF), catalyst, fructose, glucose, zeolite.
Epoksida dan Kinetika Minyak Jarak Pagar Sebagai Pemlastis Film Polivinil Klorida Asep Saefurohman; Purwantiningsih Sugita; Suminar S Achmadi
Jurnal Kimia Valensi JURNAL Valensi Volume 2, No. 3, November 2011
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i3.113

Abstract

Tujuan dari penelitian ini adalah menentukan kondisi optimum untuk epoksidasi minyak jarak dengan variasi suhu (T) dan konsentrasi katalis pada waktu reaksi yang sama, mengkarakterisasi hasil epoksidasi atau pemlastis dengan parameter bilangan iodine dan bilangan oksirana serta menentukan orde reaksi dan energi aktivasi menggunakan studi kinetika.  Penentuan Ea epoksidasi dilakukan pada kondisi waktu reaksi 12 jam, dengan suhu 50, 60, dan 70oC. Hasil penelitian menunjukkan bahwa kondisi optimum sintesis pemlastis menghasilkan bilangan oksirana 4.2%.  Sementara itu, bilangan iodin secara signifikan berkurang dari 2,6-15,3 lebih rendah tetapi bilangan oksirana relatif tinggi, 123,4-205,8 lebih tinggi sebelum dilakukan epoksidasi. Analisis dengan metode respon permukaan menunjukkan bahwa model persamaan matematika untuk bilangan oksirana adalah:17.8733 + 0.5498x + 1.2830y – 0.0039z – 0.1960xy – 0.004xz.  Karakterisasi epoksidasi dengan GC-MS menunjukkan waktu retensi 14.809 untuk metil cis-9,10–epoksioleat (MW 312). Kinetika reaksi menunjukkan orde ke satu dan konstanta laju untuk bilangan iodine masing-masing adalah: 50, 60, dan 70 oC adalah  9.97 ´ 10-2, 3.4 ´ 10-2, 21.34 ´ 10-2. Sementara itu, konstanta laju untuk bilangan oksirana adalah  11.28 ´ 10-2, 4.39 ´ 10-2, 1.89 ´ 10-2. Energi aktivasi masing-masing untuk bilangan iodine dan oksirana adalah  24.99 kcal/mol and 82.296 kcal/mol.   Kata Kunci : Epoksidasi, Kinetika, Poli Vinil Klorida, Minyak Jarak, Pemlastis
Synthesis of Green Diesel from Palm Oil Using Nickel-based Catalyst: A Review Aziz, Isalmi; Sugita, Purwantiningsih; Darmawan, Noviyan; Dwiatmoko, Adid Adep
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 1, May 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i1.26488

Abstract

Petroleum is the primary energy that is generally used throughout the world. Its non-renewable nature and exhaust gas emissions that can damage the environment are a concern for developing environmentally friendly renewable energy. Green diesel is an alternative energy to replace diesel fuel (diesel) from petroleum which has the potential to be developed. The raw material in palm oil has great potential for development due to its relatively high production. Green diesel synthesis can be carried out using the catalytic deoxygenation method. The type of raw material, catalyst, and process conditions influences this method. The catalyst is the most influential factor in catalytic deoxygenation. Transition metal catalysts like nickel are inexpensive and have good catalytic activity like precious metals. Catalytic activity can be increased by modifying the catalyst components and optimizing the process. Modification of the catalyst can increase the surface area, Lewis and Bronsted sites, and crystal size so that the resulting green diesel can be maximized, such as Ni-Co, Ni-Zn, and Ni-Mo bimetallic catalysts.
Modified Natural Rubber Based on the Sulphur Curing System as Rubber Compound Formulation on Basic Design of Seismic Bearing Cifriadi, Adi; Sugita, Purwantiningsih; Kemala, Tetty; Nikmatin, Siti; Puspitasari, Santi; Falaah, Asron Ferdian; Wijaya, Usman
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.39963

Abstract

Indonesia is highly susceptible to earthquakes, with the southern and western coasts of Java and Sumatra being the most vulnerable regions. Due to this vulnerability, it is necessary to establish a culture of disaster mitigation in the most fertile and heavily populated islands to reduce the number of fatalities and economic losses caused by earthquakes. One of the promising real-world seismic base isolation methods is using a rubber seismic bearing constructed of rubber and metal layers. This study aimed to examine the typical behavior of natural rubber compounds subjected to various sulfur-curing processes as basic designs in the manufacture of rubber seismic bearings. The experiment was carried out by arranging the sulfur curing system into three categories, namely an efficient which applied N-cyclohexyl-2-benzothiazole sulfonamide (CBS)/Sulfur (S) ratio as 1.4/0.15 and 1.4/0.25, semi-efficient with CBS/S ratio of 1.4/1.4 and 1.4/1.7, and conventional with CBS/S ratio of 1.4/3.0 and 1.4/3.5. The results showed that the ideal modification condition for NR macromolecule chain found in seismic-bearing rubber compound was a semi-efficient sulfur curing system with a CBS/S ratio of 1.4/1.4. It suggested that a semi-efficient sulfur curing system was appropriate for developing rubber compound formulation for seismic rubber bearings, mainly for low-damping types.
Modified Natural Rubber Based on the Sulphur Curing System as Rubber Compound Formulation on Basic Design of Seismic Bearing Cifriadi, Adi; Sugita, Purwantiningsih; Kemala, Tetty; Nikmatin, Siti; Puspitasari, Santi; Falaah, Asron Ferdian; Wijaya, Usman
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.39963

Abstract

Indonesia is highly susceptible to earthquakes, with the southern and western coasts of Java and Sumatra being the most vulnerable regions. Due to this vulnerability, it is necessary to establish a culture of disaster mitigation in the most fertile and heavily populated islands to reduce the number of fatalities and economic losses caused by earthquakes. One of the promising real-world seismic base isolation methods is using a rubber seismic bearing constructed of rubber and metal layers. This study aimed to examine the typical behavior of natural rubber compounds subjected to various sulfur-curing processes as basic designs in the manufacture of rubber seismic bearings. The experiment was carried out by arranging the sulfur curing system into three categories, namely an efficient which applied N-cyclohexyl-2-benzothiazole sulfonamide (CBS)/Sulfur (S) ratio as 1.4/0.15 and 1.4/0.25, semi-efficient with CBS/S ratio of 1.4/1.4 and 1.4/1.7, and conventional with CBS/S ratio of 1.4/3.0 and 1.4/3.5. The results showed that the ideal modification condition for NR macromolecule chain found in seismic-bearing rubber compound was a semi-efficient sulfur curing system with a CBS/S ratio of 1.4/1.4. It suggested that a semi-efficient sulfur curing system was appropriate for developing rubber compound formulation for seismic rubber bearings, mainly for low-damping types.
Isolation and Structural Characterization of Biflavonoids from Araucaria hunsteinii and Araucaria columnaris: Chemotaxonomic and Pharmacological Perspectives Sugita, Purwantiningsih; Ningtias, Widya Sekar Ayu; Priandanda, Rafi Chandra; Ilmiawati, Auliya; Kurniawanti, Kurniawanti; Agusta, Dhea Demitri; Dianhar, Hanhan; Rahayu, Dyah Utami Cahyaning
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 2, November 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i2.46173

Abstract

Biflavonoids are a distinctive class of dimeric flavonoids known for their diverse biological activities and chemotaxonomic significance. In this study, two biflavonoids were isolated from the acetone extracts of Araucaria hunsteinii twigs and Araucaria columnaris leaves collected from Bogor Botanical Garden, Indonesia. Chromatographic techniques, including Sephadex LH-20 column chromatography and preparative thin-layer chromatography, were employed for purification, followed by structural elucidation using LC-MS/MS and 1D/2D NMR spectroscopy. The compounds were identified as 4',4''',7,7''-tetra-O-methylcupressuflavone (1) and 7-O-methylcupressuflavone (2). Notably, this is the first report of 7-O-methylcupressuflavone isolated from A. columnaris leaves, providing new chemotaxonomic insights into the genus Araucaria. A literature-based pharmacological analysis revealed promising cytotoxic and α-glucosidase-inhibitory activities of the isolated compounds. These findings contribute to the phytochemical profiling and highlight the pharmaceutical potential of Araucaria-derived biflavonoids.
Co-Authors Achmad Sjachriza Achmad Sjahriza Ade Heri Mulyati Adi Cifriadi, Adi ADI SANTOSO Adi Santoso Adi Santoso Agusta, Dhea Demitri Akhiruddin Maddu Apriandi, Azwin Asep Hidayat Asep Hidayat Asep Saefurohman Asron Ferdian Falaah, Asron Ferdian Auliya Ilmiawati Azkiyah, Dina Bambang Srijanto Bambang Srijanto Bambang Srijanto Budi Arifin Cece Sumantri Dedi Duryadi Solihin Dian Susanthy Diana Widiastuti Dita Ariyanti dwi wahyono Dwiatmoko, Adid Adep Dyah Iswantini Ellin Vina Setyowati Epi Taufik Ermin Katrin Winarno Ermin Katrin Winarno Fifia Zulti Firdayani, Firdayani fithri amelia Fitri, Iis Yusma Ghozali, Ali Aulia Gustini Syahbirin Hanhan Dianhar Harjono - Harjono Harjono Hefni Effendi Henny Purwaningsih Herdini , Herdini Herdini . Ida Ayu Putu Sri Widnyani Irmanida Batubara Isalmi Aziz Jaya Hardi Kiagus Dahlan Kiagus Dahlan Kurniawan, Yehezkiel Steven Kurniawanti, Kurniawanti Kustiariyah Tarman LAKSMI AMBARSARI latifah K Darusman Latifah K. Darusman Lia Anriani Luthfan Irfana mahdi mubarok Mas’ud, Zainal Alim Mela Faradika Mersi Kurniati Muhamad Rifai Muhamad Rifai Muhammad Fathurrahman Napthaleni , Napthaleni, Napthaleni Ningtias, Widya Sekar Ayu Novik Nurhidayat Noviyan Darmawan Nur Qadri Rasyid Okti Rachmawati Okti Rachmawati Okti Rachmawati Priandanda, Rafi Chandra Pujiyati Pujiyati Pujiyati, Puspita Sari Puspita Sari Rahayu, Dyah Utami Cahyaning Rahmani, Nabiila Rarah Ratih Adjie Maheswari Rasyid, Nur Qadri Rini Siswati Asnel Santi Puspitasari Siti Nikmatin Siti Warnasih Suminar S Achmadi SUMINAR SETIATI ACHMADI Taher, Dharmawaty M. Tetty Kemala Tiltje Andretha Ransaleleh Tuti Wukirsari Tuti Wukirsari Tuti Wukirsari Umi Cahyaningsih Uswatun Hasanah Wasmen Manalu Yuyu Yundhana Zainal Alim Mas’ud Zulti, Fifia Zuniar Subastian Zuraida Hanum Zuraida Hanum Zuraida Hanum