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All Journal Reaktor Widya Teknik JMM (Jurnal Masyarakat Mandiri) SAINTEK: Jurnal ilmiah Sains dan Teknologi Industri
Wenny Irawaty
Chemical Engineering Department, Widya Mandala Catholic University Surabaya
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

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Potensi Limbah Pertanian Indonesia sebagai Agen Antidiabetes: Studi Kasus Rambut Jagung dan Kulit Jeruk Irawaty, Wenny
SAINTEK: Jurnal Sains dan Teknologi Industri Vol 3 No 2 (2019): Saintek: Jurnal Ilmiah Sains dan Teknologi Industri
Publisher : Universitas katolik Musi Charitas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.781 KB) | DOI: 10.32524/saintek.v3i2.601

Abstract

Selama ini limbah produk pertanian seperti rambut jagung dan kulit jeruk purut belum dimanfaatkan secara maksimal. Mengingat bahwa setiap bagian tanaman mempunyai kandungan fenolik tertentu sebagai hasil dari metabolisme sekundernya, maka ada kemungkinan bahwa kedua limbah tersebut dapat dimanfaatkan sebagai salah satu sumber antioksidan alami. Oleh karena itu pada studi ini dipelajari bagaimana kandungan fenolik dalam rambut jagung dan kulit jeruk serta bagaimana kemampuan ekstrak kedua bahan tersebut dalam mengurangi tingkat konversi pati menjadi gula pada uji antidiabetes. Prosedur penelitian meliputi persiapan bahan baku, ekstraksi, uji aktivitas bahan dan pemuatan ekstrak ke dalam pori nanomaterial untuk pengembangan ekstrak sebagai . Dari hasil studi terlihat bahwa rambut jagung dan kulit jeruk mempunyai kandungan total fenolik total yang berbeda-beda. Secara spesifik untuk rambut jagung, terlihat bahwa varietas jagung memberikan kontribusi yang besar terhadap kandungan total fenoliknya. Rambut jagung dari varietas P11 mempunyai kandungan fenolik terbesar yaitu mencapai 1.58 mg GAE/g. Oleh karena itu bahan ini mempunyai aktivitas antioksidan terhadap radikal bebas DPPH tertinggi, namun mempunyai aktivitas antidiabetes yang relatif rendah. Untuk kulit jeruk, hasil studi menunjukkan bahwa kulit jeruk lemon, nipis dan purut mempunyai kandungan total fenolik yang berbeda-beda namun kulit jeruk purut mengandung fenolik yang tertinggi yaitu 23.36 mg GAE/g, sedangkan kulit lemon dan nipis masing-masing 7.94 dan 9.71 mg GAE/g. Kajian lebih dalam terhadap buah jeruk purut yaitu terhadap kulit, daun dan sari buah jeruk purut menunjukkan bahwa bagian kulit mengandung total fenolik tertinggi dibandingkan dengan bagian buah lainnya. Penggunaan pelarut yang berbeda saat uji antidiabetes ekstrak kulit jeruk purut menunjukkan bahwa aktivitas antidiabetes ekstrak kulit jeruk purut dipengaruhi oleh jenis pelarut yang digunakan. Loading ekstrak kulit jeruk purut ke dalam pori nanomaterial telah berhasil dilakukan dan hal ini menjanjikan aplikasi di masa mendatang sebagai penghantar obat. Namun hal ini masih memerlukan kajian lainnya untuk dapat memaksimalkan keefektifan terapi diabetes menggunakan produk-produk alam.
FRACTIONATION OF PHENOLIC COMPOUNDS FROM KAFFIR LIME (Citrus hystrix) PEEL EXTRACT AND EVALUATION OF ANTIOXIDANT ACTIVITY Yusak Adi Wijaya; Daniel Widyadinata; Wenny Irawaty; Aning Ayucitra
Reaktor Volume 17 No. 3 September 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (220.717 KB) | DOI: 10.14710/reaktor.17.3.111-117

Abstract

Side effects of drug-based treatment observed in patients during degenerative diseases treatments has directed towards to the identification of plants with antioxidant activity. Kaffir lime peel was selected in this study. This work was aimed to investigate the effect of solvent (hexane, ethyl acetate and n-butanol) polarity on the fractionation of ethanolic crude extract and assess its antioxidative property by DPPH radical scavenging assay. The results show semi polar solvent of ethyl acetate exhibited the best solvent to extract phenolic compounds from ethanolic kaffir lime peel with total phenolic content detected was 0.12 mg Gallic Acid Equivalent/mg. The employment of solvents possessing different polarity resulted several fractions, i.e. hexane, ethyl acetate, n-butanol and residue with different type of phenolic compounds in each fraction. Accordingly, each fraction exhibited different antioxidant activity against free radical compound of DPPH. The N-butanol fraction demonstrated the strongest activity which is shown by lowest IC50 value among the fractions tested. The fraction of n-butanol exhibited the IC50 value of 0.44 mg/mL which means that only 0.44 mg of the fraction/mL is required to inhibit the neutralization of DPPH by 50%. Phenolic identification by High Performance Liquid Chromatography indicates the different phenolic compounds in each fraction that contribute to antioxidative property to different extent. Further investigation to identify these phenolic compounds will lead to further development of kaffir lime as natural antioxidant to treat specific degenerative diseases.
Antimicrobial Activity of Kaffir Lime Peel Extract against Streptococcus mutans Rosalie Purwanto; Jeni Pabontong; Ery Susiany Retnoningtyas; Wenny Irawaty
Reaktor Volume 18 No. 4 December 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.052 KB) | DOI: 10.14710/reaktor.18.04.235-240

Abstract

Kaffir lime peels contain polyphenols as natural antioxidant and antimicrobial agent. The aims of this study were to (1) extract phenolics compounds from kaffir lime peels using water, ethanol 70% and ethanol 96% as the solvent, and (2) assess the antibacterial activity of the extract against Streptococcus mutans which is the main cause of dental caries. Research methodology includes preparation and extraction of polyphenols from kaffir lime peels, preparation of mouthwash based-kaffir lime peels extracts and evaluation the mouthwash ability to inhibit the growth of Streptococcus mutans. The results show water exhibited the best solvent to extract polyphenols among the three solvents. The total phenolics content in the water extract was observed at 11.42±0.48 mg GAE/g, whilst in the two ethanolic extracts were 10.91±0.87 and 8.87±0.53 mg GAE/g for ethanol 70 and 96%, respectively. Consequently, the water-based extract performed the highest antimicrobial activity. The highest inhibition zone was demonstrated by 100% extract of concentration extract variation. Although the inhibition zone of the mouthwash was smaller than the commercial product, the extract has the potential to be developed as a safe mouthwash for long-term usage.Keywords: dental caries; kaffir lime; mouthwash; peel; phenolic; Streptococcus mutans
Studi in vitro ekstrak kulit jeruk purut untuk aplikasi terapi diabetes melitus Cicilia Setyabudi; Stefani Tanda; Wenny Irawaty Santosa; Felycia Edi Soetaredjo
Widya Teknik Vol 14, No 1 (2015)
Publisher : Widya Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.857 KB) | DOI: 10.33508/wt.v14i1.1737

Abstract

Jeruk purut memiliki kandungan senyawa polifenol dan flavonoid yang diyakini memiliki sifat antioksidan sehingga mampu menangkal radikal bebas yang menghambat kinerja pankreas dalam menghasilkan hormon insulin untuk menstabilkan jumlah glukosa di dalam darah manusia. Antioksidan yang berasal dari limbah kulit jeruk purut menjadi fokus penelitian ini. Beberapa studi menunjukkan adanya aktivitas antioksidan yang lebih tinggi dalam limbah buah; seperti kulit dan biji; daripada bagian buah yang dapat dikonsumsi. Pada penelitian ini, senyawa antioksidan dalam kulit jeruk diekstrak dengan menggunakan metode maserasi menggunakan berbagai macam pelarut yang berbeda tingkat polaritasnya (air, etanol, etil asetat, dan heksana) dan variasi waktu ekstraksi pada temperatur ruang. Pada ekstrak yang diperoleh dilakukan uji kandungan total senyawa fenolik (TPC) dan total senyawa flavonoid (TFC). Dilakukan pula uji in-vitro terhadap ekstrak yang memberikan perolehan TPC dan TFC terbesar dari masing-masing pelarut untuk mengamati aktivitas antidiabetes dari ekstrak. Hasil penelitian menunjukkan bahwa air memberikan perolehan TPC dan TFC terbesar pada 18 jam, sedangkan etanol dan etil asetat pada 45 jam. Uji in-vitro pada ekstrak-ekstrak tersebut menunjukkan bahwa ekstrak kulit jeruk purut dengan pelarut etanol memberikan %inhibition enzim α-amylase tertinggi dibanding dengan pelarut lainnya, yaitu sebesar 34,2%.
Pengaruh Suhu dan Waktu Pemanasan terhadap Kandungan Vitamin A dan C Pada Proses Pembuatan Pasta Tomat Kang Tuan Hok; Wiwit Setyo; Wenny Irawaty; Felycia Edi Soetaredjo
Widya Teknik Vol 6, No 2 (2007)
Publisher : Widya Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (511.611 KB) | DOI: 10.33508/wt.v6i2.1237

Abstract

Buah tomat (Lycopersicum esculentum Mill) termasuk sayuran buah yang banyak disukai karena rasanya enak dan segar. Kualitas tomat dapat ditinjau dari rasa manis, asam, kekenyalan, dan jumlah air buah. Tujuan penelitian ini adalah untuk mempelajari hubungan suhu dan waktu pemanasan terhadap kadar vitamin A dan C dan untuk mengetahui suhu pemanasan yang optimum serta mempelajari kinetika degradasi termal pada pembuatan pasta tomat. Metode penelitian ini sebagai berikut mula-mula tomat yang sudah diblender dipanaskan dengan suhu tertentu, tiap selang waktu tertentu sampel diambil untuk dianalisis kadar vitamin C, A dan kadar padatan terlarut. Selain itu juga dianalisis konsentrasi vitamin C dalam tomat. Analisis ini dilakukan dengan beberapa metode antara lain titrasi iodometri, dan analisis dengan spektrofotometer. Dari hasil penelitian diperoleh kesimpulan bahwa: 1. semakin lama waktu pemanasan kadar padatan terlarut dalam pasta tomat semakin besar sehingga dan nilai kadar tersebut sesuai dengan SNI 01-3546-2004 yaitu minimum 24%. Untuk pengaruh suhu pemanasan yang semakin tinggi maka penurunan kadar vitamin C semakin besar, dan juga penurunan kadar vitamin A semakin besar akibat terdegradasi oleh panas; 2. reaksi degradasi termal vitamin C dalam pasta tomat mengikuti reaksi orde satu, sehingga diperoleh nilai ko dan E untuk reaksi tersebut adalah ko=0,6126 menit -1dan E=3.292,08 cal/mol.
Heterogeneous Fenton Degradation of Batik Wastewater using Natural Pyrite Irawaty, Wenny; Yuliana, Maria; Wijaya, Christian J.; Retnoningtyas, Ery S.; Lourentius, Suratno; Puspitasari, Nathania; Hamidah, Umi
Reaktor Volume 23 No.3 Desember 2023
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.23.3.101-107

Abstract

Heterogeneous Fenton processes with solid natural pyrite catalyst have gained attention for wastewater treatment. The improvement of degradation efficiency of natural pyrite is specific and therefore, it is still a challenging issue. This study was aimed to investigate the performance of Indonesian natural pyrite, without any purification, to treat the real wastewater obtained from batik home industry. To address this issue, several experiment variables such as pre-reaction between pyrite and hydrogen peroxide, hydrogen peroxide concentration, and pH were investigated. COD removal has been found to increase in a slightly acid condition (4.5 to 5.65) and inhibited at pHs of 8 and above (10). The results showed the presence of hydrogen peroxide was indeed greatly influence the wastewater degradation and the solution pH did not significantly change the wastewater degradation in the range of 3 and less than 8. Moreover, the pre-reaction period was found as the important part to initiate the degradation process. The optimum degradation efficiency was obtained by providing the pre-reaction time of 20 min with the addition of 326 mmol/L of H2O2 in the system and the mixture was reacted for 30 min at room temperature and real wastewater pH. Based on results observed in this study, it can be concluded that the batik wastewater can be degraded by natural pyrite up to 84% under reaction conditions studied. This finding offers great opportunity to further investigate and develop the heterogeneous Fenton process for real applications in industry.
PENGEMBANGAN TEPUNG PORANG DENGAN TEKNOLOGI TEPAT GUNA MESIN PENEPUNG PORANG Wijaya, Christian Julius; Santoso, Shella Permatasari; Waloyo, L. Anang Setiyo; Lie, Jenni; Gunarto, Chintya; Joewono, Andrew; Indrawati, Chatarina Dian; Irawaty, Wenny; Soetaredjo, Felycia Edi; Ismadji, Suryadi
JMM (Jurnal Masyarakat Mandiri) Vol 8, No 3 (2024): Juni
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v8i3.22591

Abstract

Abstrak: Porang merupakan komoditas alam dengan potensi yang besar dimana dapat terus dikembangkan mengingat kebutuhan ekspor yang cukup tinggi. Porang dapat dimanfaatkan menjadi berbagai produk turunan perantara maupun jadi, seperti mie, beras, tepung, dan keripik. Namun, nilai jual porang saat ini mengalami penurunan yang sangat drastis dimana berdampak negatif pada perekonomian petani porang. Berbagai trobosan diupayakan oleh pemerintah Desa Morang, Kecamatan Kare, Kabupaten Madiun untuk menyelamatkan pertanian porang dan perekonomian petani porang. Pemerintah desa menjalin kemitraan dengan Universitas Katolik Widya Mandala Surabaya untuk membuka peluang pengembangan teknologi pengolahan porang dan produk-produk turunannya. Kemitraan ini telah menghasilkan berbagai teknologi tepat guna untuk produksi produk-produk turunan porang dimana salah satunya yaitu mesin penepung porang yang dapat dipergunakan untuk produksi tepung porang. Dengan adanya fasilitas mesin ini, petani porang perlu diberikan wawasan dan keterampilan bisnis untuk memanfaatkan mesin tersebut dalam memproduksi tepung porang. Dalam kegiatan ini, pendampingan diberikan kepada kelompok petani porang di Desa Morang yang terdiri dari sekitar 30 petani dalam bentuk pelatihan penggunaan mesin, diseminasi produk turunan porang dan peluang bisnisnya, serta pendampingan produksi skala kecil. Kegiatan ini dievaluasi dengan sistem kuisioner terkait wawasan dan keterampilan yang diberikan serta pelaksanaan kegiatan ini dimana tingkat keberhasilan dari kegiatan ini mencapai lebih dari 75%.Abstract: Porang is a natural commodity with great potential which can continue to be developed considering the high demand for exports. Porang can be used to make various intermediate and finished derivative products, such as noodles, rice, flour and chips. However, the selling value of porang is currently experiencing a very drastic decline which has a negative impact on the economy of porang farmers. Various breakthroughs have been attempted by the government of Morang Village, Kare Sub-district, Madiun District to save porang farming and the economy of porang farmers. The village government has established a partnership with Widya Mandala Surabaya Catholic University to open up opportunities for developing technology for processing porang and its derivative products. This partnership has produced various appropriate technologies for the production of porang derivative products, one of which is a porang flour machine which can be used to produce porang flour. With this machine facility, porang farmers need to be given the insight and business skills to use this machine to produce porang flour. In this activity, assistance was provided to a group of porang farmers in Morang Village consisting of around 30 farmers in the form of training on machine use, dissemination of porang derivative products and business opportunities, as well as assistance with small-scale production. This activity was evaluated using a questionnaire system regarding the insights and skills provided as well as the implementation of this activity where the success rate of this activity reached more than 75%.
A Review of Biofuels and Their Positive Impacts on Health and the Environment Yuliana, Maria; Ismadji, Suryadi; Wijaya, Christian Julius; Soetaredjo, Felycia Edi; Lie, Jenni; Hartono, Sandy Budi; Irawaty, Wenny; Puspitasari, Nathania; Lourentius, Suratno
Widya Teknik Vol 23, No 1 (2024)
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v23i1.5454

Abstract

Indonesia's high population and rapid economic growth are driving a major transformation in the transportation sector, which is in line with the high increase in fuel demand. The need for biofuel as a substitute for conventional fuel is increasingly being prioritized by considering sustainable development goals (SGDs). Biofuel has safer health and environmental impacts than conventional fuel but still has fuel performance that meets fuel standards and engine performance. Biofuels can be derived from a variety of more sustainable and abundant raw materials, such as biomass and vegetable oils. In this review biodiesel, hydrogenated vegetable oil (HVO), and direct vegetable oil (SVO) are discussed in depth regarding the transformation of their production processes and their impacts on health and the environment. Biodiesel is one of the most widely developed and implemented compared to HVO and SVO to encourage the use of renewable energy in various aspects of people's lives in Indonesia. These three biofuels have different fuel characteristics and performance but can continue to be developed in the future to increase the implementation of renewable energy more massively.
Co-Authors Andrew Joewono, Andrew Aning Ayucitra Chatarina Dian Indrawati Cicilia Setyabudi Daniel Widyadinata Ery Susiany Retnoningtyas Felycia Edi Soetaredjo Gunarto, Chintya Hamidah, Umi Hartono, Sandy Budi Jeni Pabontong Kang Tuan Hok Lie, Jenni Lourentius, Suratno Puspitasari, Nathania Retnoningtyas, Ery S. Rosalie Purwanto Santoso, Shella Permatasari Stefani Tanda Suryadi Ismadji Waloyo, L. Anang Setiyo Wijaya, Christian J. Wijaya, Christian Julius Wiwit Setyo Yuliana, Maria Yusak Adi Wijaya