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All Journal Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) Jurnal Abdimas Madani dan Lestari (JAMALI) Jurnal Teknik Kimia Indonesia Widya Teknik
Felycia Edi Soetaredjo
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Other

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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 : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | 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%.
Preparation of Clay Minerals – Natural Surfactant Composites to Remove Organic Dyes and Heavy Metals Laysandra, Livy; Kurniawan, Darwin; Soetaredjo, Felycia Edi; Ismadji, Suryadi
Widya Teknik Vol. 22 No. 2 (2023): November
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v22i2.5417

Abstract

The rapid development of industry is considered to be the main cause of various environmental problems, which are mainly caused by the discharge of wastewater which contains many hazardous compounds. Dyes and heavy metals are type of hazardous substances that are often found in industrial wastewater and cause ecosystem damage. Dyes and heavy metals are more difficult to remove due to their inability to be broken down, so they can build up and reach dangerous levels. Adsorption is a straighforward and efficient method for dealing with hazardous substance contamination in water. Clay minerals, known for their efficient adsorption properties, were chosen for this procedure. Clay minerals are porous materials so they are suitable for use as adsorbents. The intercalation technique is a robust strategy to further increase the adsorption capacity of clay minerals, which is done by treating clay minerals with surfactants. Clay minerals modified with natural surfactants are considered as a potential choice for removal procedures. The use of this natural surfactant was chosen because of its excellent adsorption capacity and environmentally friendly properties. Polar lipids, natural surfactants, are commonly present in the lipid layers of plants and animals. This review focuses on the synthesis of modified clay minerals using different natural surfactants such as soybeans, saponins, lipopeptides, and rhamnolipids, as well as the use of alternative clay mineral/natural surfactant composites. This review describe various types of natural surfactants that can be used to modify clay minerals and their application in the adsorption process.
A Review of the Development and Role of Heterogeneous Catalysts for Biodiesel Production Yuliana, Maria; Ismadji, Suryadi; Wijaya, Christian Julius; Soetaredjo, Felycia Edi; Gunarto, Chintya; Santoso, Shella Permatasari; Putro, Jindrayani Nyoo; Anggorowati, Adriana Anteng; Lourentius, Suratno
Widya Teknik Vol. 23 No. 1 (2024): May
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v23i1.5453

Abstract

Indonesian regulations regarding the implementation of B30 encourage a significant increase in biodiesel demand. Moreover, this implementation will continue to be increased to B35 in 2025 and is projected to reach B100 in 2045. This high demand for biodiesel needs to be supported by the development of adequate biodiesel production technology where the catalyst is one aspect that plays an important role in biodiesel production. The use of catalysts aims to accelerate biodiesel production so that high biodiesel yields and good quality are achieved. In biodiesel production, the choice of catalyst greatly influences the operating conditions, the products produced, the subsequent purification process, and the environmental impacts. Moreover, the changing trend in biodiesel raw materials from food to non-food ingredients requires the development of catalysts that are more suitable for the raw materials used in biodiesel production. The specific characteristics of each catalyst play an important role in the transesterification reaction to produce biodiesel where this needs to be supported and adapted to optimum operating conditions, especially in terms of alcohol-to-oil molar ratio, catalyst amount, temperature, pressure, and reaction time. This review provides a comprehensive overview of the various heterogeneous catalysts used to assist the transesterification reactions in biodiesel production.
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): May
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.
Teknologi Tepat Guna Mesin Pencuci Porang untuk Meningkatkan Produktivitas Petani Porang di Desa Morang, Kare, Madiun: Indonesia Irawaty, Wenny; Hadi; Wijaya, Christian Julius; Indrawati, Chatarina Dian; Anggorowati, Adriana Anteng; Soetaredjo, Felycia Edi; Santoso, Shella Permatasari; Ismadji, Suryadi; Yuliana, Maria; Ernest, Edward H; Wardhani, Rinda; Afendi, Yulius; Panjaitan, Imelda
Jurnal Abdimas Madani dan Lestari (JAMALI) Volume 06, Issue 01, Maret 2024
Publisher : UII

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jamali.vol6.iss1.art9

Abstract

Recently, the productivity of porang tuber-based products has been growing well, especially after the Indonesian Government released a policy to prohibit the export of porang plants and their harvested products. One of the porang-based products is in the form of chips. Before processing, the porang tubers must be washed thoroughly to remove soil/dirt from the surface. The conventional washing process of each tuber can take up to 3-5 minutes. Therefore, the purpose of this activity is to design and manufacture porang washing equipment based on centrifuge washing model with rubber vibration. Four stages to carried out the program, i.e. designed and manufactured the washing machine, run the machine in laboratory, training activities to the porang farmers, and evaluation process. From the observation to porang farmers as our partner during the activity, it can be seen that the partners can operate the washing machine well. The results show that the washing process of porang tuber using this technology can save the washing time up to 90% compared to the conventional washing. The surface cleanliness of porang tubers resulted from the developed washing machine is the same as the conventional one. The noise level of the machine has met the requirement of Indonesian Government. It is clear that the usage of  the machine can increase the production capacity of products-based porang tuber. In addition, the use of this technology may promote a more comfortable and healthy work environment due to ergonomic reason, however, based on RULA analysis, the machine is still need to be improved in the future. Overall, the partners were satisfied with this activity and expected to have further programs in the future.
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%.
Co-Authors . Aylianawati . Satiruiani Adriana Anteng Anggorowati Afendi, Yulius Andrew Joewono, Andrew Angkawijaya, Artik Elisa Chandra Risdian Chatarina Dian Indrawati Chindy Amelia Cicilia Setyabudi Ernest, Edward H Evy Suryaningsih Fransiska Ariyani Go, Alchris Woo Gunarto, Chintya Hadi Hartono, Sandy Budi Henny Purwati Herman Hindarso Hodiana Istiawaty Imelda Panjaitan Irene Perina Kang Tuan Hok Kurniawan, Darwin Laurentia Eka Setiawan Laysandra, Livy Lie, Jenni Linda Rusli Lourentius, Suratno Nani Indraswati Natalia Layadi Prawasmita Sedyandini Puspitasari, Nathania Putro, Jindrayani Nyoo Rinita, R Santoso, Shella Permatasari Setiyo Gunawan Stefani Tanda Suryadi Ismadji Waloyo, L. Anang Setiyo Wardhani, Rinda Wenny Irawaty Wijaya, Christian Julius Wijaya, Yentaria Juli Wiwit Setyo Youngky Siswanto Yuliana, Maria