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FaST : Jurnal Sains dan Teknologi
Published by Universitas Pelita Harapan
ISSN : -     EISSN : 25989596     DOI : -
Core Subject : Science, Social,
Computer Science & IT Environmental Science
Started in 2017, FaST publishes articles in the areas of science and technology, particularly in food technology, biology, electrical engineering, industrial engineering, mathematics and civil engineering. Articles are either reviews and/or research results.
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol. 9 No. 1 (2025): NOVEMBER" : 12 Documents clear
Analisis Keamanan Kunci-Pintu Nirkabel Mobil dengan Software Defined Radio (SDR): [Analysis of Wireless Car-Key Security with Software Defined Radio (SDR)] Hartanto, Hadipranowo; Martoyo, Ihan
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.1994

Abstract

Wireless Communication is not a new phenomenon in the 21st century. Many devices are using wireless technology, including opening a car’s door using a remote wireless key. To ensure the security of a wireless system, certain encryption methods and algorithms are used.  The rolling code techniques, where the encryption code will be rolled to a different code after usage, are often found in wireless car key systems. This paper describes the analysis of the wireless car-key security by trying to take over control by using Software Defined Radio (SDR). The security is tested using a simple mechanism of save-and-replay, in which the signal from the wireless car-key is received by an SDR and saved into a computer within a large distance from the car. If the car-key signal is not received by the car, the rolling code mechanism might not be triggered.  Then the same car-key signal can be replayed to try to open the car door. A few cars which we tested can be opened in such a way. In this paper some security practices will be suggested to avoid the save-replay hacking mechanism with SDR. Bahasa Indonesia Abstract: Komunikasi nirkabel bukanlah suatu fenomena yang baru pada abad ke-21. Banyak alat yang memanfaatkan teknologi nirkabel, termasuk membuka pintu mobil dengan kunci nirkabel. Untuk menjamin keamanan sistem nirkabel biasanya dilakukan dengan algoritma dan metode enkripsi tertentu. Metode keamanan dengan mekanisme rolling code, di mana kode enkripsi yang digunakan selalu berganti ke kode yang berbeda setelah dipakai, biasanya ditemukan dalam sistem kunci nirkabel mobil. Paper ini menjelaskan analisis tingkat keamanan dari sistem kunci-mobil nirkabel dengan berusaha mengambil alih kendali berbekal Software Defined Radio (SDR). Keamanan akan diuji dengan mekanisme yang cukup sederhana, yakni simpan dan kirim, di mana sinyal dari kunci nirkabel akan ditangkap dengan SDR dan disimpan ke dalam komputer dengan jarak yang cukup jauh dari mobil. Jika sinyal kunci tidak ditangkap mobil, maka mekanisme rolling code tidak terpicu. Setelah itu sinyal yang sama dapat diputar ulang untuk mencoba membuka kunci mobil. Beberapa mobil yang diuji dapat dibuka dengan cara demikian. Dalam paper ini juga akan diusulkan praktik pengamanan untuk menghindari pembukaan kunci dengan mekanisme simpan-kirim dengan SDR.
Rancang Bangun Prototipe Sistem Keamanan Rumah Berbasis Internet Of Things (IoT) dengan Integrasi Sensor Pintar: [Design and Construction of an Internet of Things (IoT)-Based Home Security System Prototype with Smart Sensor Integration] Abidin, Zainal; Bachri , Affan; Nugraha , Rizky Ananda
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.9461

Abstract

In this study, the author designed an internet-connected security system that allows homeowners to easily and efficiently control and monitor the system. The microcontroller used in this study, the ESP32-WROVER-CAM module, also requires several sensors: a PIR sensor, an RFID sensor, a touch sensor, a reed switch, a buzzer, a relay module, a camera sensor, and a door lock solenoid. This research resulted in a home security system that can be controlled in two ways: using RFID sensor readings and using the Telegram app. Using the Telegram app, the system responds and executes the command. Using an RFID card by attaching the card to the reader, if the card is detected correctly, all sensors will detect no suspicious activity. If someone opens the door by breaking in, the buzzer will sound, activating all sensors to notify the door has been forced open by an unknown person. Bahasa Indonesia Abstract: Pada penelitian ini penulis merancang sebuah sistem keamanan yang terkoneksi dengan internet sehingga pemilik rumah dengan mudah dapat mengontrol dan memonitoring dengan mudah dan efisien. Mikrokontroller yang digunakan pada penelitian ini yakni Modul ESP32-WROVER CAM, juga memerlukan beberapa sensor yaitu sensor PIR, sensor RFID, sensor sentuh, reed switch, buzzer, modul relay, sensor kamera dan selenoid door lock. Penelitian ini menghasilkan sebuah sistem keamanan rumah yang dapat dikontrol menggunakan 2 cara yaitu menggunakan pembacaan dari sensor RFID dan juga bisa menggunakan aplikasi telegram, jika menggunakan aplikasi telegram dengan memberikan perintah ke sistem, sistem akan merespon dan langsung mengeksekusi perintah. Jika menggunakan kartu RFID dengan cara menempelkan kartu ke reader, apabila kartu yang terdeteksi benar maka seluruh sensor tidak akan mendeteksi hal-hal yang mencurigakan. Apabila seseorang membuka pintu dengan cara dibobol maka buzzer akan berbunyi, semua sensor aktif untuk memberikan notifikasi bahwa pintu telah dibuka secara paksa oleh orang yang tidak dikenali.
Memanfaatkan R untuk Preprocessing Data yang Efisien dalam Analisis Prediktif : [Leveraging R for Efficient Data Preprocessing in Predictive Analytics] Yudistira, I Gusti Agung Anom
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10366

Abstract

The digital era has triggered a data explosion, demanding efficient data preprocessing capabilities. The R programming language, supported by a wide range of packages, offers effective solutions for preprocessing tasks, particularly in handling missing values. This study aims to demonstrate the practical and efficient use of R in improving the quality of predictive models and to provide a practical guide for academics and practitioners. The research adopts a descriptive-exploratory approach through a case study using R for data preprocessing. The stages include data collection, data cleaning and transformation, result visualization, optional predictive analysis, and systematic documentation as a practical guide. The data imputation process in R begins with analyzing variable correlations and distributions using scatter plot matrices and histograms, followed by selecting appropriate imputation methods such as linear regression, mean, or median. R facilitates this process through its comprehensive functions and visualization tools. As this study does not address all aspects of data preprocessing—particularly missing data handling—it is recommended that future research explore alternative imputation techniques such as k-nearest neighbors (kNN) and other preprocessing components. Bahasa Indonesia Abstract: Era digital menghasilkan ledakan data yang menuntut kemampuan preprocessing data yang efisien. Bahasa R, dengan berbagai paket pendukungnya, menawarkan solusi efektif untuk preprocessing, khususnya dalam penanganan missing values. Penelitian ini bertujuan mendemonstrasikan pemanfaatan R untuk meningkatkan kualitas model prediktif dan memberikan panduan praktis bagi akademisi serta praktisi.  Metodologi yang digunakan dalam penelitian adalah metode deskriptif eksploratif dengan studi kasus menggunakan R untuk preprocessing data. Tahapannya meliputi pengumpulan data, pembersihan dan transformasi data, visualisasi hasil, serta dokumentasi langkah-langkah sebagai panduan praktis.  Pada penelitian ini dilakukan percobaan dengan membangun data simulasi, yang dihasilkan dari data besar yang sudah bersih, kemudian dibuat dibuat menjadi data yang tidak lengkap dengan memanfaatkan paket R messy. Proses imputasi data dengan R dimulai dari analisis korelasi dan distribusi variabel menggunakan scatter plot matrix dan histogram, memilih metode imputasi yang sesuai seperti regresi linear, rata-rata, atau median. R memudahkan proses ini lewat fungsi dan visualisasi yang lengkap.  Hasil evaluasi dilakukan dengan membandingkan bentuk sebaran data asli, dengan data simulasi yang telah dibersihkan.  Hasil yang diberikan menunjukkan bahwa kedua data memberikan bentuk sebaran yang tidak signifikan.
Rancang Bangun Alat Pengiris Singkong dengan Metode Quality Function Deployment (QFD): [Design and Development of a Cassava Slicing Tool using The Quality Function Deployment (QFD) Method] Christiani, Agustina; Theresia, Jessica
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10369

Abstract

This research was conducted to design and develop a cassava slicing tool for the UMKM (Micro, Small, and Medium Enterprises) "Keripik Singkong Bu Supiah" located in Keranggan Village. The design and development process of this slicing tool was carried out using the Quality Function Deployment (QFD) approach and a House of Quality (HOQ) matrix, which was employed to gather user needs (voice of the customer) and then further analyzed to generate HOWs (engineering characteristics). Additionally, a component planning matrix was created, resulting in three key components for the tool's development: the main frame, slicing mechanism, and slicing blade. The next step involved designing and constructing the cassava slicing tool based on user requirements. The developed cassava slicing device was constructed from iron and was equipped with three blades mounted on a rotating disc, which was operated manually using a hand crank. The device also features a container for placing the cassava, fitted with a spring mechanism that facilitates the movement of the cassava toward the blades. The testing results of the developed tool showed a 6.1% improvement in slicing time efficiency and a 0.54% increase in slicing yield. Moreover, the tool development helped minimize the risk of hand injuries from the blade and eliminated waste during the cassava slicing process. Bahasa Indonesia Abstract: Penelitian ini dilakukan dengan tujuan untuk merancang dan mengembangkan alat pengiris singkong pada UMKM Keripik Singkong Bu Supiah yang terletak di Desa Keranggan. Proses perancangan dan pengembangan alat ini dilakukan dengan pendekatan Quality Function Deployment (QFD) yang digunakan untuk mengumpulkan kebutuhan pengguna (voice of customers) yang kemudian akan dianalisis lebih lanjut untuk menghasilkan HOWs (engineering characteristics). Selain itu, terdapat matriks perencanaan komponen yang menghasilkan tiga komponen penting dalam pengembangan alat, yaitu kerangka utama, mekanisme pengirisan, dan pisau pengiris. Proses selanjutnya adalah perancangan dan pembuatan alat pengiris singkong berdasarkan kebutuhan pengguna. Alat pengiris singkong yang dikembangkan terbuat dari besi dengan 3 bilah pisau dipasang pada piringan dan dioperasikan menggunakan engkol yang diputar secara manual. Pada alat tersebut juga terdapat wadah tempat meletakkan singkong yang dilengkapi dengan pegas yang dapat mendorong singkong ke arah pisau. Hasil uji coba dari alat yang telah dikembangkan adalah terdapat peningkatan efisiensi sebesar 6,1% terhadap waktu pengirisan singkong dan peningkatan sebesar 0,54% terhadap hasil irisan singkong. Selain itu, pengembangan alat juga dapat meminimalkan resiko tangan tergores mata pisau dan menghilangkan waste yang terdapat dalam proses pengirisan singkong.
Karakteristik Fermentasi Kitin dari Kulit Udang Windu (Penaeus monodon) dengan Kapang Trichoderma virens : [Characteristics of Chitin Fermentation from Black Tiger Shrimp (Penaeus monodon) using Trichoderma virens] Handayani, Ratna; Gerardo Kevin Liguna
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10371

Abstract

Black tiger shrimp (Penaeus monodon) is the most widely used shrimp in fisheries industries of Indonesia for export. This activity contribut to increase the amount of shrimp shell waste. Shrimp shell contains chitin at 15-20%. Chitin can be hydrolyzed using chitinase to produce N-acetylglucosamine. This research was conducted to determine profile of chitin fermentation yield from black tiger shrimp shell (Penaeus monodon) using Trichoderma virens. Chitin was made by demineralization and deproteination black tiger shrimp shell waste.  The production of fermentation yield was using solid substrate fermentation. Duration of fermentation process was 8 days, incubation temperature was 30 oC and pH 4. Based on the results of fourier transform infrared (FT-IR) spectrophotometer and liquid chromatography-mass spectrometry (LC-MS) analysis, it can be seen that crude N-acetylglucosamine oligosaccharides can be produced as the result of chitin fermentation besides N-acetylglucosamine. It can be determined from the presence of C-O-C groups and the molecular weight (10949,6230) which is a derivative molecule of GlcNAc-2-Man-3-GlcNAc-Fuc-GlcNAc and can be classified as N-gylcans. Bahasa Indonesia Abstract: Udang windu (Penaeus monodon) merupakan jenis udang yang paling banyak diekspor oleh negara Indonesia. Kegiatan ini berkontribusi dalam peningkatan jumlah limbah kulit udang. Di dalam kulit udang, terkandung 15-20% kitin. Kitin dapat dihidrolisis menggunakan enzim kitinase untuk menghasilkan N-asetilglukosamin. Penelitian ini bertujuan mengetahui profil hasil fermentasi kitin dari kulit udang windu (Penaeus monodon) dengan kapang Trichoderma virens. Kitin dibuat dengan proses demineralisasi dan deproteinasi limbah kulit udang windu. Proses produksi hasil fermentasi kitin menggunakan proses fermentasi substrat padat. Proses fermentasi dilakukan selama 8 hari dengan suhu inkubasi 30 oC, and pH 4. Berdasarkan hasil analisis fourier transform infrared (FT-IR) spectrophotometer dan liquid chromatography-mass spectrometry (LC-MS) dapat diketahui bahwa selain dihasilkan N-asetilglukosamin dapat dihasilkan crude oligo N-asetilglukosamin merupakan hasil fermentasi kitin. Hal tersebut dapat diketahui dari adanya gugus C-O-C dan berat molekul (1094,6230) yang merupakan molekul turunan GlcNAc-2-Man-3-GlcNAc-Fuc-GlcNAc dan dapat digolongkan sebagai N-glikan.
Perancangan dan Implementasi Electronic TPM (E-TPM) Berbasis Website dengan QR Code pada Mesin Tire Final Inspection di PT XYZ: [Design and Implementation of a Website-Based Electronic TPM (E-TPM) with QR Codes on The Tire Final Inspection Machine at PT XYZ] Sialahi, Rudy Vernando; Rachman, Rahardyan
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10375

Abstract

In the Industrial Revolution 4.0, continuous innovation is crucial for companies striving to achieve their vision and mission. One key initiative is implementing Total Productive Maintenance (TPM). PT XYZ, however, encounters challenge due to its ongoing use of conventional, paper-based methods. These methods have numerous drawbacks, such as incomplete documentation of machine damage, outdated information caused by maintenance department oversights, extended data retrieval times, and the risk of document loss or damage. To overcome these issues, an innovative transition was made from a paper-dependent system to a digital, web-based platform to enhance TPM's effectiveness. Data was collected through direct field observation and processed using the SMART (Specific, Measurable, Achievable, Relevant, Timebound) methodology to accurately identify problems and solutions. A web-based application named E-TPM was developed, utilizing the PHP programming language, the CodeIgniter framework, a MySQL database, and a straightforward, user-friendly interface designed with Bootstrap 5.0. This digital shift offers substantial benefits, including real-time management of machinery damage data, improving TPM monitoring efficiency. Digital data storage reduces the risk of falsification or loss, as information is centrally located. Moreover, E-TPM implementation has led to a significant reduction in paper costs, approximately Rp. 495,000 per year, due to the elimination of paper-based TPM tags that are prone to damage or loss. Finally, access to precise data and in-depth analysis enables management to make better-informed decisions regarding maintenance strategies. Bahasa Indonesia Abstract: Dalam era revolusi industri 4.0, inovasi menjadi kunci bagi perusahaan dalam mencapai visi dan misi mereka. Salah satu inovasi tersebut adalah penerapan Total Productive Maintenance (TPM). Namun, PT XYZ masih mengandalkan sistem konvensional berbasis kertas yang memiliki berbagai kelemahan seperti pencatatan kerusakan mesin yang tidak lengkap, risiko data usang karena pembaruan lambat, pencarian data yang membutuhkan waktu lama, serta risiko kehilangan atau kerusakan dokumen. Sebagai solusi, metode paper-based digantikan dengan sistem digital melalui pengembangan situs web untuk mengoptimalkan TPM. Data dikumpulkan melalui observasi lapangan dan dianalisis menggunakan metode SMART (Specific, Measurable, Achievable, Relevant, Timebound) untuk memastikan solusi yang efektif. Selanjutnya, aplikasi berbasis web yang dinamakan E-TPM dikembangkan menggunakan PHP, dengan framework CodeIgniter, database MySQL, dan desain antarmuka yang mudah digunakan dengan Bootstrap 5.0. Transformasi digital ini memungkinkan pengelolaan data kerusakan mesin secara real-time, meningkatkan efisiensi pengawasan kegiatan TPM. Penyimpanan data secara digital mengurangi risiko pemalsuan dan kehilangan data. Penerapan E-TPM juga berdampak positif pada penghematan biaya hingga Rp 495.000 per tahun dengan mengurangi penggunaan kertas untuk tag TPM. Dengan data yang akurat, manajemen dapat lebih efektif dalam merumuskan strategi pemeliharaan.
Fermentation Using Providencia stuartii and Salmonella enterica to Produce N-Acetylglucosamine from Shrimp Shells’ Chitin Halim, Yuniwaty; Chanan Din, Nabilah binti; Soedirga, Lucia C.
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10385

Abstract

Chitin is a biopolymer that can be extracted from exoskeleton of shrimp shells and other arthropods. One of its derivatives is N-acetylglucosamine that is comprised of glucose and amino acid glutamine. N-acetylglucosamine is known for its health effect, particularly in the treatment of osteoarthritis symptoms. One of the methods to produce N-acetylglucosamine is by fermentation using chitinolytic microorganisms. The aim of this research was to determine the optimum condition (pH, ratio of bacteria, fermentation time, and temperature) for fermentation using the combination of Providencia stuartii and Salmonella enterica to produce N-acetylglucosamine. The research was conducted at different pH (5, 6, 7, 8, 9) and bacterial ratios (3:1, 1:1 and 1:3). Furthermore, the optimum incubation temperature (30, 37, 40oC) and fermentation time (1, 2, 3 and 4 days) were also evaluated. The results showed the optimum condition was achieved at pH 8 with bacterial ratio of 1:1, incubated at 37oC for 3 days.  Under these conditions, N-acetylglucosamine concentration obtained was 87,707.04 ± 906.54 ppm.
The Role of Geopolymer Concrete in Achieving Sustainable Development Goals Wibowo, Kevin Aprilio; Widjajakusuma, Jack
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10386

Abstract

A sense of safety and comfort is a fundamental right for all people. The United Nations strives to fulfil this through the establishment of 17 Sustainable Development Goals (SDGs). The construction sector plays a significant role in achieving these goals, particularly in the areas of Good Health and Well-being, Clean Water and Sanitation, Decent Work and Economic Growth, Sustainable Cities and Communities, Responsible Consumption and Production, and Climate Action. One key effort in the construction sector is replacing Portland cement with pozzolanic materials. Cement production emits large amounts of carbon dioxide, contributing substantially to global warming. To address this, pozzolanic materials such as fly ash are used as a substitute for cement in the production of geopolymer concrete. Based on compressive strength tests on cylindrical specimens and flexural strength tests on beam specimens, geopolymer concrete demonstrates high potential for structural applications. Its mechanical performance is comparable to that of conventional concrete, making it a promising alternative that supports sustainable development in the construction industry.
Optimization of Galangal Essential Oil Stik Balsam Formula (Alpinia galanga (L.) Willd.): [Optimization of Galangal (Alpinia galanga (L.) Willd.) Essential Oil Stick Balsam Formula] Ernestine Arianditha Pranasti; Ayuningtyas, Nurista Dida; Pramitaningastuti, Anastasia S.; Cahaya, Gabriella Lisye
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10387

Abstract

High occurrence of muscle pain has encouraged the development of practical natural solutions, such as stick balm formulated with galangal (Alpinia galanga) essential oil, which shows potential as a topical analgesic agent. This study formulated galangal stick balm to relieve muscle pain while meeting physical requirements and user preferences. The formulation involved variations in base composition (solid paraffin and white petrolatum) and methyl salicylate concentration to evaluate physical characteristics such as pH, homogeneity, melting point, and irritation potential. A hedonic test was conducted to determine the most preferred formula. Results showed that all formulas had safe pH levels (4.5–6.5), good homogeneity, melting points between 57–60°C, and caused no skin irritation in volunteers. Hedonic testing identified Formula F4 as the best candidate based on aroma, warmth, and texture. Therefore, galangal essential oil stick balm has promising potential to be developed as a safe, stable, and user-friendly analgesic topical preparation. Bahasa Indonesia Abstract: Tingginya kasus nyeri otot mendorong pengembangan solusi alami yang praktis, seperti balsam stik berbahan minyak atsiri lengkuas (Alpinia galanga), yang memiliki potensi sebagai agen analgetik topikal. Penelitian ini merumuskan formulasi balsam stik lengkuas untuk meredakan nyeri otot yang memenuhi syarat fisik dan disukai. Formulasi dilakukan dengan variasi komposisi basis (paraffin solid dan vaselin album) dan variasi metil salisilat untuk mengevaluasi karakteristik fisik seperti pH, homogenitas, titik lebur, dan potensi iritasi. Uji kesukaan dilakukan untuk melihat formula mana yang paling disukai. Hasil menunjukkan bahwa seluruh formula memiliki pH dalam rentang aman (4,5–6,5), homogenitas yang baik, titik lebur antara 57–60°C, serta tidak menimbulkan iritasi pada kulit sukarelawan. Uji kesukaan menunjukkan Formula F4 sebagai kandidat terbaik berdasarkan aroma, kehangatan, dan tekstur. Dengan demikian, balsam stik minyak atsiri lengkuas berpotensi dikembangkan sebagai sediaan antinyeri yang aman, stabil, dan disukai pengguna.
Pengaruh Penambahan Ekstrak Kulit Buah Naga terhadap Karakteristik Fisikokimia, Aktivitas Antioksidan, dan Sensori Permen Jeli Glukomanan Konjak : [The Impact of Dragon Fruit Peel Extract Addition on The Physicochemical Properties, Antioxidant Activity, and Sensory Attributes of Konjac Glucomannan Jelly Candy] Amrinola, Wiwit; Sekarningrum, Hanandhiya
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 9 No. 1 (2025): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jstfast.v9i2.10389

Abstract

Dragon fruit peel is an agro-industrial by-product rich in bioactive compounds such as flavonoids, anthocyanins, phenolics, thiamine, pyridoxine, cobalamin, and carotene, which exert various physiological health effects. This study aimed to evaluate the effect of dragon fruit peel extract on the physical, chemical, functional, and sensory characteristics of konjac glucomannan-based jelly candy. The research was conducted in two stages: (1) extraction and characterization of dragon fruit peel extract, and (2) formulation of jelly candy with four extract concentrations, namely T0 (0%), T1 (9%), T2 (10%), and T3 (11%). Data were analyzed using ANOVA followed by Duncan’s multiple range test. The extract contained alkaloids, flavonoids, tannins, and steroids, with total anthocyanin content of 77.57 mg/L and antioxidant activity of 46.3%. The best formulation was obtained at T3 (11%), which exhibited total anthocyanins of 27.55 mg/L, antioxidant activity (IC50) of  98.44 ppm, total dissolved solids of 60.63 0brix, hardness of 2.31 N, L* is -46,40, a* is 30,81, b* is 14,80, c* is 32,19, H* is 9,35, and an overall sensory acceptance score of 4.68 (neutral–like). The addition of up to 11% dragon fruit peel extract enhanced antioxidant activity of the jelly candy without negatively affecting consumer acceptance. Bahasa Indonesia Abstract: Kulit buah naga merupakan hasil samping yang kaya akan senyawa bioaktif seperti flavonoid, antosianin, fenolik, tiamin, piridoksin, kobalamin, dan karoten yang memiliki efek fisiologis bagi kesehatan. Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak kulit buah naga terhadap karakteristik fisik, kimia, fungsional, dan sensori permen jeli berbasis glukomanan konjak. Penelitian terdiri atas dua tahap, tahap 1 adalah ekstraksi dan karakterisasi ekstrak kulit buah naga, dan tahap 2 adalah formulasi permen jeli dengan empat perlakuan konsentrasi ekstrak kulit buah naga: T0 (0%), T1 (9%), T2 (10%), dan T3 (11%). Analisis yang dilakukan meliputi analisis fisik, analisis kimia, analisis fungsional, dan analisis sensori. Data dianalisis menggunakan ANOVA dan uji lanjut Duncan. Hasil penelitian menunjukkan bahwa ekstrak kulit buah naga mengandung alkaloid, flavonoid, tanin, dan steroid, dengan total antosianin 77,57 mg/L dan aktivitas antioksidan 46,3%. Formula terbaik diperoleh pada perlakuan T3 (11%) dengan total antosianin 27,55 mg/L, aktivitas antioksidan 38,28%, total gula 60,63%, kekerasan 2,31 N, L* sebesar -46,40, a* sebesar 30,81, b* sebesar 14,80, c* sebesar 32,19 dan H* sebesar 9,35, dan nilai penerimaan sensori keseluruhan 4,68 (kategori netral–suka). Penambahan ekstrak kulit buah naga hingga 11% meningkatkan kandungan senyawa bioaktif dan aktivitas antioksidan tanpa menurunkan penerimaan konsumen.

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