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Preparasi Komposit Polimer Alami Berbasis Pektin Kulit Jeruk Bali sebagai Edible Coating pada Tomat Palungki, Anteng Relis; Auliah, Nahdatul; Imani, Nadya Alfa Cahaya
Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v11i1.6923

Tomato (Solanum lycopersicum L.) is very susceptible to damage and has a relatively short shelf life. The increased production of tomatoes which are not accompanied by an increase in consumption will cause a large amount of waste. An edible coating (EC) film could increase the durability of tomatoes thus it is needed to improve the quality and shelf life of tomatoes. EC is a thin layer that is safe for consumption and environmentally friendly. In this study, EC was prepared by extracting pectin from pomelo peel combined with one of two ingredients, carboxy methyl cellulose (CMC) and tapioca, and using a plasticizer in the form of glycerol. Measurement of weight loss and organoleptic tests (color and texture) of tomatoes were carried out for 14 days. The best results were obtained by pectin 3% (w/w), CMC 1% (w/w) and tapioca 1% (w/w). The EC was able to increase the shelf life of tomatoes up to day 14 with a weight loss of 0.063%, while tomatoes without coating had been tainted on day 6 with a weight loss of 0.387%.

FUNGSIONALISASI PLASMA DINGIN UNTUK PENGUAT IKATAN ADHESI PADA KOMPOSIT JERAMI PADI Harianingsih, Harianingsih; Imani, Nadya Alfa Cahaya; Sulistyawan, Vera Noviana; Pangestu, Indra Sakti; Erliana, Savira Rinda; Ubay, Isnina Noor
Bookchapter Alam Universitas Negeri Semarang No. 4 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ka.v1i4.171

Bahan lignoselulosa yang berasal dari jerami padi masih belum dioptimalkan sepenuhnya, dengan hanya sekitar 7-16% dari potensinya yang dimanfaatkan dalam industri. Salah satunya adalah pemanfaatannya sebagai bahan pengisi atau penguat dalam produk komposit polimer kayu, namun adhesi antarmuka pada aplikasi tersebut masih menjadi tantangan yang signifikan. Penggunaan perlakuan plasma dingin (atmosferik) sebagai alternatif untuk meningkatkan efektivitas serat jerami pada komposit kayu. Komposit dibuat dengan menggunakan serat jerami dan matriks polyvinyl alcohol yang bersifat biodegradable. Perlakuan plasma dilakukan dengan variasi waktu 10, 20, dan 30 detik, serta dibandingkan dengan komposit tanpa perlakuan plasma. Kekuatan komposit serat jerami/polivinil alkohol dianalisis melalui pengujian flexural, dengan fokus pada setiap variasi waktu perlakuan plasma. Kekuatan flexural tertinggi tercapai pada perlakuan plasma dengan durasi 30 detik. Perlakuan plasma, baik dengan maupun tanpa plasma, memberikan perbedaan signifikan dalam kekasaran permukaan. Plasma secara konsisten meningkatkan kekasaran, yang pada gilirannya meningkatkan adhesi antarmuka pada matriks komposit. Potensi peningkatan sifat mekanis dan morfologis komposit serat jerami/polivinil alhohol melalui perlakuan plasma, membuka peluang baru dalam pengembangan material yang ramah lingkungan dan efisien secara ekonomi.

Preparasi Komposit Polimer Alami Berbasis Pektin Kulit Jeruk Bali sebagai Edible Coating pada Tomat Palungki, Anteng Relis; Auliah, Nahdatul; Imani, Nadya Alfa Cahaya
Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Tomato (Solanum lycopersicum L.) is very susceptible to damage and has a relatively short shelf life. The increased production of tomatoes which are not accompanied by an increase in consumption will cause a large amount of waste. An edible coating (EC) film could increase the durability of tomatoes thus it is needed to improve the quality and shelf life of tomatoes. EC is a thin layer that is safe for consumption and environmentally friendly. In this study, EC was prepared by extracting pectin from pomelo peel combined with one of two ingredients, carboxy methyl cellulose (CMC) and tapioca, and using a plasticizer in the form of glycerol. Measurement of weight loss and organoleptic tests (color and texture) of tomatoes were carried out for 14 days. The best results were obtained by pectin 3% (w/w), CMC 1% (w/w) and tapioca 1% (w/w). The EC was able to increase the shelf life of tomatoes up to day 14 with a weight loss of 0.063%, while tomatoes without coating had been tainted on day 6 with a weight loss of 0.387%.

Pendampingan Pembuatan Biobriket Dari Pemanfaatan Sumber Daya Lokal Limbah Sabut Kelapa di Desa Kemujan Karimunjawa Kusumaningrum, Maharani; Pradnya, Irene Nindita; Wulansarie, Ria; Zakia, Maulida; Bahlawan, Zuhriyan Ash Shiddieqy; Imani, Nadya Alfa Cahaya; Permanadewi, Indrasukma; Salsabila, Luvena; Suwandi, Luluk Arvi Cahyaning; Wati, Afifah Sagita Fitria; Syahputra, Adhika Bintang; Fandika, Putri Maharani Adinda; Pramitha, Deva Aurelya; Pratama, Muhammad Herdi; Diana, Savira Rahma; Sadan, Serlia Fitri; Imanullah, Kautsar Taqi
Dedikasi:Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 1 (2024): Jurnal Dedikasi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/dedikasi.v5i1.360

Abstrak Desa Kemujan, yang terletak di Kecamatan Karimunjawa, memiliki potensi besar dalam memanfaatkan limbah sabut kelapa sebagai bahan baku biobriket. Dengan luas wilayah 162,1 km² dan populasi 3.391 jiwa, desa ini memiliki keberagaman budaya dan suku yang kaya. Limbah sabut kelapa yang terdapat di Desa Kemujan pada saat ini belum dimanfaatkan secara optimal. Hal ini terjadi karena minimnya kesadaran dan pengetahuan masyarakat sekitar untuk mengolah sabut kelapa tersebut. Sabut kelapa merupakan biomassa yang dapat dimanfaatkan sebagai bahan alami pembuatan biobriket. Sehingga pengabdian melalui pendampingan dan pelatihan pembuatan biobriket untuk memanfaatkan sumber daya lokal sabut kelapa di Desa Kemujan Karimunjawa perlu diselenggarakan. Metode pelaksanaan yang dilakukan dalam pengabdian ini adalah sosialisasi terkait biobriket dan pelatihan pembuatan biobriket dari sabut kelapa secara langsung. Hasil yang didapat dari pengabdian ini adalah meningkatkan nilai guna dan nilai ekonomis sabut kelapa, berkontribusi pada pengembangan UMKM di Desa Kemujan, serta meningkatkan kesadaran dan pengetahuan masyarakat terkait pemanfaatan limbah sabut kelapa serta proses pembuatan biobriket dari sabut kelapa. Keywords: Biobriquettes; Coconut Husk; Waste

Pengendalian Stunting Melalui Edukasi Pengolahan Ragam Makanan Sehat dari Bahan Lokal dan Pendampingan Posyandu di Kelurahan Bongsari, Kota Semarang (Kolaborasi UNNES - PT Phapros, Tbk): Stunting Preventin through A Training on Processing a Variety of Healthy Foods from Local Ingredients and Assistance for Posyandu Cadres in Kelurahan Bongsari, Semarang City (Collaboration of UNNES and PT Phapros, Tbk) Kusumaningtyas, Ratna Dewi; Lestari, Yanesti Nuravianda; Handayani, Prima Astuti; Laila, Rachma Akmila; Salsabila, Anida; Rahmah, Aisyah Khalimatur; Putri, Silvia Nouvelia; Rachmadi, Moch Faizal; Jannah, Reni Ainun; Imani, Nadya Alfa Cahaya; Barita, Asyera Dewi; Kun, Stefania Orance; Nindita, Ariana Eka
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 4 (2024): Oktober-Desember 2024
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i4.9424

Stunting is among the national priority issue in the National Medium Term Development Plan (RPJMN). At the global level, stunting is also a priority based on the Sustainable Development Goals (SDGs), especially related to the 3rd and 2nd SDGs, namely "good health and well-being" and "zero hunger". In this regard, the Semarang City Government has targeted that by 2024 the city will be free of stunting or zero stunting. On the other hand, the city of Semarang still records quite significant stunting data, namely 912 cases in 2024. To achieve the target of zero stunting, a synergy between the government, community, universities and industrial corporate social responsibility is necessary and can be implemented through community service and empowerment activity. Kecamatan Semarang Barat is among the area which record a quite high stunting rates in Semarang city, namely 84 cases in January 2024. To reduce the stunting rate in Kecamatan Semarang Barat, especially Kelurahan Bongsari, is a synergy between universities (UNNES), industry (pharmaceutical company PT Phapros Tbk), and local government is developed through a community service activities. Community service activities has been carried out in the form of education on stunting awareness, training on processing a variety of healthy foods from local ingredients and training to increase the capacity of posyandu cadres in Kelurahan Bongsari. UNNES and PT Phapros Tbk team also contribute in the form of recipe book, vitamins, and anthropometry equipment.

The Effect of Air Injection for Formation of Radicals in Liquid Glow Discharge Plasma Electrolysis with K2SO4 Solution Harianingsih, Harianingsih; Rengga, Woro Dyah Pita; Kusumaningrum, Maharani; Imani, Nadya Alfa Cahaya; Saksono, Nelson; Zakaria, Zainal
Reaktor Volume 23 No.2 August 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.23.2.37-43

Glow discharge is part of the phenomenon of plasma formation on the electrode side in contact with the electrolyte solution and begins with an electrolysis reaction with direct electric current. In this research, 0.02 M K2SO4 electrolyte was used, the anode in the form of tungsten and stainless steel for the cathode in a direct current plasma electrolysis reactor. The phenomenon of plasma formation is explained using a strong current and voltage characteristic curve. There are three plasma formation zones: the ohmic zone, the transition zone and the glow discharge plasma zone. Air injection affects the formation of glow discharge plasma and radicals. Without the injection of air, radicals formed only •OH, •H and •O with emission intensities of 20012 a.u, 10121 a.u and 10245 a.u. Air injection 0.8 L men-1 produced radicals •OH, •N, •N2*, •N2+, •H and •O with emission intensities of 30863a.u, 20139 a.u, 28540 a.u, 18023 a.u, 12547 a.u and 49800 a.u. Many radicals are generated when the plasma reaches stability. The plasma is dominated by H2O ionization, and the plasma is more stable if formed in the gas phase. Other results from this research at 0 L men-1, 0.2 L men-1, 0.4 L men-1 and 0.8 L men-1 stable plasma were formed at 675 V, 660 V, 650 V and 650 V. The plasma that can be seen from the bright light, the injection of air accelerates the formation of a gas envelope to reduce energy.

Understanding the Impact of Curing Duration on Characteristics of Durian Extract-Based Solid Soap Imani, Nadya Alfa Cahaya; Pribadi, Meidwiarta Cahya; Irsyada, Muhamad Zakky; Kusumaningrum, Maharani; Asri, Sarwi; Ardhiansyah, Hanif
Indonesian Journal of Chemical Research Vol 13 No 1 (2025): Edition for May 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.13-nad

This study aims to understand the effect of curing duration on the characteristics of durian extract-based solid soap. Durian extract-based soap has unique properties that can be affected by the curing process, namely the duration of drying and maturation of the soap after manufacture. In this study, soap was produced using durian extract as the main ingredient, with curing time variations ranging from 2 weeks to 6 weeks. During the curing process, the water content in the soap decreased, and the saponification reaction between alkali and free fatty acids from durian extract took place further. The characteristics of the soap analyzed included hardness, pH, free fatty acid content, and foam durability and quality. The results showed that the soap became more challenging as the curing time increased, with a more stable pH and lower free fatty acid content. In addition, the durability of the soap increased, and the foam quality became more optimal. Longer curing durations were also associated with increased stability and safety of the resulting soap. This study provides new insights into the development of durian extract-based soap. It can be used as a reference to improve the quality of natural soap products through proper curing process management.

MENGUBAH TANTANGAN MENJADI PELUANG: PENGELOLAAN LIMBAH POPOK BAYI MENJADI PUPUK ORGANIK UNGGULAN Kusumaningrum, Maharani; Imani, Nadya Alfa Cahaya; Wulansarie, Ria; Handayani, Prima Astuti; Hibatullah, Ridwan Dani; Nanggala, Pragusti Lintang Adhi; Ichwan, Rizky; Nada, Athiya Rihadatul ‘Aisy Qothrun
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2024): Volume 5 No 1 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i1.24767

Semakin banyaknya limbah rumah tangga yang dihasilkan khususnya limbah popok bayi memerlukan penanganan khusus agar limbah popok tersebut bisa mempunyai nilai guna yang lebih tinggi. Limbah popok menjadi salah satu limbah terbesar yang membutuhkan usaha yang besar dalam pengolahannya karena sebagian besar masyarakat masih mempunyai kesadaran yang kurang akan adanya timbunan limbah popok bayi. Kandungan dalam limbah popok bayi seperti kotoran dan air kencing balita akan memberikan dampak negatif kepada masyarakat jika tidak segera ditangani. Oleh karena itu, perlunya pengolahan lebih lanjut agar limbah popok tidak semakin menumpuk. Lahan di Kelurahan Mangunsari, Kecamatan Gunungpati, Kota Semarang masih banyak yang digunakan sebagai lahan pertanian. Para petani lebih sering menggunakan metode sebar pupuk di atas tanah untuk metode pemupukannya. Hal ini telah dikaji bahwa nitrogen dari pupuk mudah terbawa ke aliran sungai dan menguap ke udara sehingga menurunkan efektivitas pemupukan dan biaya pemupukan yang diperlukan lebih tinggi. Kegiatan pengabdian telah dilaksanakan dengan cara metodologis dimulai dari identifikasi, sosialisasi, pelatihan, program aksi dan diakhiri dengan evaluasi. Dengan adanya pelaksanaan pegabdian terkait pengolahan limbah popok bayi menjadi pupuk organik yang ramah lingkungan dan media tanam akan membantu agar pemupukan pada tanaman menjadi lebih efektif. Adanya kandungan SAP pada limbah popok bayi yang bercampur dengan tanah juga dapat mempertahankan kadar air, sehingga menjaga ketersediaan air bagi tanaman pada musim kemarau.

Penerapan Mesin Spinner Peniris Minyak dan Perbaikan Kemasan Produk pada UMKM Keripik di Desa Kemetul, Kecamatan Susukan, Kabupaten Semarang Kusumaningtyas, Ratna Dewi; Prasetiawan, Haniif; Bahlawan, Zuhriyan Ash Shiddieqy; Widyastuti, Catur Rini; Imani, Nadya Alfa Cahaya; Rachmadi, Moch Faizal; Jannah, Reni Ainun; Ichwan, Rizky; S., Syifa Azzahra Putri
Jurnal Abdimas Vol. 29 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v29i2.36448

Desa Kemetul, Kecamatan Susukan is one of 208 villages developed into tourist villages in Kabupaten Semarang. Desa Kemetul is an area rich in agricultural products. Cassava and taro crops in this village are often processed into chips and serve as a source of income for residents. Common problems that often arise with chip products are the remaining oil content in the chips after frying and inappropriate product packaging. Thus, it reduces the quality and shelf life of the chip product. This Community Service activity focused on improving the chip production process at the Jago MSME in Desa Kemetul. The activity began with discussions and coordination with the local government and Jago MSME owner as partner. The activities included the implementation of an oil spinner machine and improved packaging with a portable sealer and silica gel. The application of appropriate technology can improve the chips quality and shelf life of products. It as well increases production capacity, profit potential, and support the development of Desa Kemetul as a tourist village.

Microencapsulation of Watermelon Rind Extract (Citrullus Lanatus) Using Maltodextrin and Gum Arabic as a Food Supplement Applications Kusumaningrum, Maharani; Imani, Nadya Alfa Cahaya; Permanadewi, Indrasukma; Ardhiansyah, Hanif; Handayani, Dwi; Situmorang, Monatalia Lamtama; Rizkiyana, Luthfi; Audyaz-Zahra, Chealsy Zafarina; Indriawati, Aisya Eka
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 2 (2025): Jurnal Rekayasa Kimia & Lingkungan (December, 2025) In Press
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i2.45954

The food and beverage sector generates a large amount of organic waste, one of which is watermelon rind. Although it contains bioactive compounds such as lycopene, vitamin C, and phenolic compounds with antioxidant properties, watermelon rind is often discarded due to the rapid degradation of these compounds by light and temperature. This study proposes a solution to the aforementioned issue: the microencapsulation of watermelon rind (Citrullus lanatus) extract obtained through maceration. The process utilizes maltodextrin and gum arabic as coating materials and employs oven drying at temperatures of 45C, 50C, and 55C. The DPPH method evaluated strong antioxidant activity with an IC50 value of 70 ppm. Principal component analysis showed the content of Ethyl isoallocholate (31.80%), 5-Hydroxymethylfurfural (7.25%), 7,8-Epoxylanostan-11-ol, 3-acetoxy- (6.10%), and 2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one (4.04%), where Ethyl isoallocholate inhibited DPPH radicals by 88%. The optimal formulation was achieved with an extract:solvent ratio of 20:80 and a maltodextrin and gum arabic ratio of 1:0, at 50C, yielding 81.161%. The microcapsules formed showed a spherical morphology, a smooth surface and showed small micro-cracks, and an average diameter between 20-80 m. Formulation with maltodextrin and gom arabic ratio of 3:4 at 55C produced the highest solubility (99.92%) and the lowest moisture content (0.97%). This study shows that microencapsulation is able to protect active compounds from degradation and has the potential to become a quality food supplement from natural ingredients, as well as supporting the reduction of organic waste and environmentalpreservation.

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