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All Journal International Journal of Advances in Applied Sciences EKSAKTA: Journal of Sciences and Data Analysis Reaktor CHEMICA Jurnal Teknik Kimia Seminar Nasional Teknik Kimia Kejuangan Community Development Journal: Jurnal Pengabdian Masyarakat Dedikasi: Jurnal Pengabdian kepada Masyarakat Jurnal Teknik Kimia USU
Nadya Alfa Cahaya Imani
Department Of Chemical Engineering, Universitas Negeri Semarang, Semarang, Indonesia
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Pengaruh Variasi Konsentrasi Gliserol pada Edible Coating dari Ekstraksi Pektin Limbah Kulit Durian sebagai Pengawet pada Cabai Rawit Merah untuk Memperpanjang Masa Simpan Idama Kusuma Dewi; Naila Khoirina; Nadya Alfa Cahaya Imani
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020: PROSIDING SNTKK 2020
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Adsorption Studies of Rice Husk-Based Silica/Carbon Composite Wara Dyah Pita Rengga; Wahyudi Budi Sediawan; Nadya Alfa Cahaya Imani; Harianingsih Harianingsih; Kega Amalania Salsabiil
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss2.art1

Abstract

Rice husk as a by-product of the rice milling process is a material that can still be processed to be a product that can be used in various applications. The potential for the commercialization ofrice husks is still hampered by its low economic value. By using the heating method using an inert gas, rice husk can be converted into a composite which contains mostly silica and carbon, a wellknown component with excellent adsorbent properties. This aimed to study the preparation of rice husk-baased silica/carbon composite and its adsorption behavior. In this research, the utilization of rice husk into silica/carbon composites was done by using three different methods. Common heating under temperature of 800 oC, heating process under temperature of 800 oC using furnace equipped with inert gas, and heating process under temperature of 800 oC using furnace equipped with inert gas with addition of glucose solution were carried out in order to obtain three different kinds of composite. Analysis and characterization using were performed to observe the properties of the composites. As the result, from Fourier Transform Infra-Red and X-Ray diffraction characterizations, silica/carbon composites were successfully made as both of carbon and amorphous silica spectra appeared in the result. Furthermore, composite made under temperature of 800 oC using furnace equipped with inert gas with addition of glucose solution has the highest adsorption capacity and Langmuir’s model adsorptive behavior with R2 value of 0.935.
Performance of Tween 80 as Surfactant for Chitosan Drug Delivery Film Nadya Alfa Imani; Maharani Kusumaningrum
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14792

Abstract

Optimization of the drug delivery system is based on the need for more efficient and effective drugs to fight disease. The addition of surfactant as an additive in the drug delivery precursor solution can affect the performance of the material, especially on the ability of drug release. In this study, Tween 80 was used as a surfactant to be mixed in a low molecular weight chitosan solution. Several variations of the Tween 80: chitosan ratios, as well as variations in acidity conditions, are used to determine the optimum conditions for drug release. Drug release profile fittings were tested on three kinetic models that were frequently used namely zero order model, Higuchi’s model, and Korsmeyer-Peppa’s model. The results showed that the optimum conditions for release were obtained with the use of a ratio of 7:10 with a release profile resembling Korsmeyer-Peppa’s model.
Preparasi Komposit Polimer Alami Berbasis Pektin Kulit Jeruk Bali sebagai Edible Coating pada Tomat Anteng Relis Palungki; Nahdatul Auliah; Nadya Alfa Cahaya Imani
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 | Full PDF (304.78 KB) | DOI: 10.32734/jtk.v11i1.6923

Abstract

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%.
An overview of the potential of Citrus hystrix (kaffir lime) essential oil as mosquito repellent Nurul Asyikin Md Zaki; Junaidah Jai; Izzat Syahmi Kamal Shahrizan; Dewi Selvia Fardhyanti; Megawati Megawati; Nadya Alfa Cahaya Imani
International Journal of Advances in Applied Sciences Vol 11, No 4: December 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (290.133 KB) | DOI: 10.11591/ijaas.v11.i4.pp360-366

Abstract

A chemical-based insect repellent such as N, N-diethyl-3-methylbenzamide (DEET) is commonly used against all insects despite its toxicity in humans. Hence, a repellent agent from natural sources of plant essential oil was introduced. Some of the plants which have the repellent potential are catnip, hairy basil, citronella, vetiver, clove, and citrus. Citronellal, citronellol, geraniol, eugenol, eugenol-acetate, and beta-caryophyllene are among the repellent active components in these plants. Citrus hystrix (kaffir lime) was known for several applications in food, health, and skincare, but its potential as mosquito repellent is still new. This overview paper highlights the potential of kaffir lime essential oil as a mosquito repellent and the encapsulation of essential oil related to mosquito repellent. Several studies on kaffir lime essential oil as mosquito repellent was conducted and revealed that the major repellent active components are citronellol and limonene. Pure kaffir lime essential oil provides one-hour repellent protection against the mosquito. However, an addition of 5% vanillin prolongs the protection time to three hours. Essential oil is easily vaporized at room temperature which shortens its effectiveness time. Encapsulation of the essential oil would control the vaporization process and hence prolong its efficiency. Nonetheless, almost no research work reported on the encapsulation of kaffir lime essential oil and the release mechanism of the encapsulated kaffir lime.
Peningkatan Keterampilan Masyarakat UMKM Tahu Kelurahan Sumurejo, Semarang melalui Pelatihan Pembuatan Pelet Pakan Ternak dari Limbah Ampas Tahu Nadya Alfa Cahaya Imani; Ratna Dewi Kusumaningtyas; Dwi Widjanarko; Irene Nindita Pradnya; Handri Rama Pradani; Ashroful In'am
Dedikasi:Jurnal Pengabdian kepada Masyarakat Vol 3, No 1 (2022): Jurnal Dedikasi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/dedikasi.v3i1.203

Abstract

Jumlah limbah yang terus meningkat merupakan dampak negatif dari perkembangan industri pengolahan kedelai yang sebenarnya meningkatkan perekonomian masyarakat. Dalam upaya untuk menyelesaikan masalah tersebut, pemanfaatan limbah ampas tahu menjadi pakan alternatif bagi ternak merupakan salah satu solusi yang potensial untuk dilakukan. Namun, karena keterbatasan informasi dan keterampilan, produk limbah ampas tahu yang diproses menjadi produk pakan alternatif masih kurang sempurna. Bentuk akhir berupa butiran tepung dirasa masih kurang optimal dan memiliki bermacam kekurangan seperti mudah hancur, mudah tercecer, dan bahkan terkadang lengket hingga menempel satu dengan lainnya. Solusi dari masalah tersebut adalah teknologi pembuatan bentuk pelet pada produk pakan ternak dari limbah ampas tahu. Berkaitan dengan permasalahan tersebut maka dilakukan upaya inovasi kegiatan pengabdian kepada masyarakat di wilayah Kelurahan Semurrejo, Kecamatan Gunungpati, Kota Semarang yang diprioritaskan pada pemberian edukasi kepada masyarakat mengenai pentingnya pengelolaan limbah yang baik dan potensi dari limbah ampas tahu dan pelatihan keterampilan pada masyarakat mengenai teknologi pembuatan pelet pakan ternak dari limbah ampas tahu. Hasil dari kegiatan yang telah dilakukan membuktikan bahwa adanya peningkatan edukasi pada masyarakat dan juga peningkatan kualitas pakan ternak.
The Effect of Air Injection for Formation of Radicals in Liquid Glow Discharge Plasma Electrolysis with K2SO4 Solution Harianingsih Harianingsih; Woro Dyah Pita Rengga; Maharani Kusumaningrum; Nadya Alfa Cahaya Imani; Nelson Saksono; Zainal Zakaria
Reaktor Volume 23 No.2 Agustus 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

Abstract

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.
EDUKASI DAN PEMBERDAYAAN MASYARAKAT: PENGENALAN PENGOLAHAN LIMBAH KULIT DURIAN MENJADI SABUN PADAT Nadya Alfa Cahaya Imani; Maharani Kusumaningrum; Sarwi Asri; Hanif Ardhiansyah; Bagus Yuliono; Meidwiarta Cahya Pribadi; Athiya Rihadatul; Aisy Qothrun Nada; Muhamad Zakky Irsyada
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 4 No. 5 (2023): Volume 4 Nomor 5 Tahun 2023
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v4i5.19358

Abstract

Limbah kulit durian yang masih mengandung berbagai vitamin, flavonoid, saponin, selulosa, lignin, pati, dan kandungan lain sangat berpotensi untuk di olah menjadi berbagai produk diversifikasi. Kulit durian diketahui mengandung selulosa yang tinggi (50-60%) dan lignin (5%) serta pati (5%). Bagian dengan porsi 60-75% dari keseluruhan buah ini masih belum dimanfaatkan secara maksimal dan hanya dibiarkan menjadi limbah atau dibakar begitu saja. Salah satu produk olahan yang dapat bermanfaat untuk digunakan sehari-hari ataupun menjadi produk yang dapat dijual adalah sabun. Kandungan flavonoid dan saponin yang dimiliki kulit durian merupakan bahan yang biasanya dibutuhkan dalam pembuatan sabun sebagai bahan anti bakteri dan aditif pembuat busa sabun. Dengan adanya vitamin dan bahan organik lain yang terkandung, sabun hasil olahan juga berguna untuk memberikan nutrisi pada kulit. Metode yang digunakan pada produksi sabun adalah metode cold process dimana metode ini memiliki kelebihan, yaitu mudah untuk dilakukan dan dapat membuat sabun dengan ketahanan lama. Berkaitan dengan permasalahan tersebut maka dilakukanlah upaya inovasi kegiatan pengabdian kepada masyarakat di wilayah Kelurahan Mangunsari, Kecamatan Gunungpati, Kota Semarang yang merupakan salah satu sentra produsen durian di Semarang. Upaya inovasi tersebut diprioritaskan pada: pemberian edukasi kepada masyarakat mengenai pentingnya pengelolaan limbah yang baik dan potensi dari limbah kulit durian, pelatihan keterampilan pada masyarakat mengenai teknologi pembuatan produk sabun berbahan dasar limbah kulit durian menggunakan metode cold process, pembekalan wawasan kewirausahaan terkait produk sabun.
Co-Authors Aisy Qothrun Nada Anteng Relis Palungki Ashroful In'am Athiya Rihadatul Bagus Yuliono Dewi Selvia Fardhyanti Dwi Widjanarko Handri Rama Pradani Hanif Ardhiansyah Harianingsih, Harianingsih Idama Kusuma Dewi Irene Nindita Pradnya Izzat Syahmi Kamal Shahrizan Junaidah Jai Kega Amalania Salsabiil Maharani Kusumaningrum Maharani Kusumaningrum Megawati Megawati Meidwiarta Cahya Pribadi Muhamad Zakky Irsyada Nahdatul Auliah Naila Khoirina Nelson Saksono Nurul Asyikin Md Zaki Ratna Dewi Kusumaningtyas Sarwi Asri W.D.P Rengga Wahyudi Budi Sediawan Woro Dyah Pita Rengga Zainal Zakaria