Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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ANALISIS PENENTUAN LOKASI RETAIL MENGGUNAKAN SISTEM INFORMASI GEOGRAFI DI KECAMATAN TEMBALANG DAN BANYUMANIK KOTA SEMARANG
Full text linkTembalang and Banyumanik Districts in Semarang City are experiencing rapid growth due to their educational and settlement functions, as well as the presence of the main Trans Java Toll Road. This growth necessitates increased investment and the development of modern retail spaces. However, unplanned retail expansion could lead to spatial conflicts. To address this, this study aims to determine the optimal locations for modern retail development using Geographic Information Systems (GIS). By considering spatial planning patterns, consumer preferences, and factors like population density, accessibility, and proximity to activity centers, the study will overlay these factors to identify potential retail locations. The ArcGIS software will be used for overlay-based spatial analysis to determine the most suitable locations. The results of this study explain the allocation of retail locations divided into four alternative locations. These alternative location categories are: first, second, third, and fourth. These recommendations will serve as a foundation for modern retail planning in Semarang City, supporting the preparation of detailed spatial plans (RTRW or RDTR) for the urban area
Exploration of Herpetofauna Diversity in Banten Forest Park as a Basis for Biodiversity Information
Full text linkThe Banten Forest Park is the only conservation area in Banten managed by the local government and possesses significant potential for high herpetofaunal diversity. This study aimed to document the diversity and composition of herpetofaunal species within the park. Data were collected using the Visual Encounter Survey (VES) method combined with exploratory techniques, conducted from June 22 to 23, 2024. A total of 43 individuals representing nine species, seven genera, six families, and three orders (Squamata, Serpentes, and Anura) were recorded. The Squamata order was the most dominant, comprising the families Agamidae, Gekkonidae, Scincidae, and Varanidae, with Sphenomorphus sanctus and Eutropis multifasciata identified as the most abundant species. All recorded species are categorized as Least Concern by the IUCN and are not listed as protected under Indonesian wildlife regulations. The Shannon–Wiener diversity index (H’ = 1.75) indicates a moderate level of species diversity. The findings collectively demonstrate that the habitat within Banten Forest Park maintains adequate ecological integrity to support a diverse community of reptiles and amphibians, underscoring the importance of conserving habitat heterogeneity in tropical lowland ecosystems
FRAP REDUCING ACTIVITY OF PROTIUM JAVANICUM BURM.FIL LEAVES: A SCREENING ANTIOXIDANT POTENCY OF NATURAL COSMETIC INGREDIENT
Full text linkTenggulun (Protium javanicum Burm.fil) has been traditionally used to treat various ailments such as cough, stomachache, diarrhea, inflammation and headache. The leaves have therapeutic roles in the treatment and prevention of illnesses acting as antibacterial, antidiabetic and antiinflammation agents. It is also reported that tenggulun leaves can be used for insecticides, cosmetics and food additives. This research aimed to determine antioxidant activity by reducing FRAP of the tenggulun leaves methanol extract using Trolox as the standard solution. The result showed that the tenggulun leaves extract contained secondary metabolites of flavonoid and polyphenolic. The extract showed the FRAP reducing activity at 0,008634±0.00043 μmol TE/g DW. These results indicated the ability of tenggulun methanolic extract to reduce Fe (III) into Fe (II) equivalent to Trolox by the presence of secondary metabolites confirmed
THE COSMETIC-RELEVANT BIOLOGICAL ACTIVITIES OF OIL EXTRACTS AND PROTEIN HYDROLYSATES FROM HERMETIA ILLUCENS LARVAE: A COMPARATIVE REVIEW
No full textThe cosmetic industry is increasingly seeking sustainable bioactive ingredients from novel biological sources to meet growing consumer demand for naturally derived formulations with reduced environmental impact. Black soldier fly (Hermetia illucens) larvae have emerged as a promising alternative source of cosmetic bioactives, offering advantages in sustainability, resource efficiency, and circular bioeconomy integration. This comparative review systematically analyzes cosmetic-relevant biological activities of oil extracts and protein hydrolysates derived from H. illucens larvae. A comprehensive literature search was conducted across multiple scientific databases using targeted keywords related to BSF extracts and cosmetic applications. BSF larvae oil is characterized by a lipid profile rich in lauric acid (12–52%), oleic, linoleic, and palmitic acids, resembling coconut and palm kernel oil compositions. These fatty acids contribute to antimicrobial, anti-inflammatory, antioxidant, and photoprotective activities through mechanisms including membrane disruption, enzyme inhibition, and reactive oxygen species (ROS) scavenging. BSF oil extracts show strong potential for anti-acne formulations, skin barrier enhancement, and UVB protection. Protein hydrolysates obtained through enzymatic hydrolysis contain bioactive peptides (14–25 kDa) with high antioxidant capacity (up to 72.6% free radical inhibition) and cytoprotective effects against oxidative stress. In addition, BSF larvae produce diverse antimicrobial peptides (AMPs), such as defensins and cecropins, which target both Gram-positive and Gram-negative bacteria via membrane disruption and intracellular interference. This review highlights BSF-derived ingredients as multifunctional, sustainable alternatives to conventional cosmetic actives, positioning H. illucens as a next-generation source for evidence-based cosmeceutical applications
Water Saturation Calculation Using Archie’s Equation for Shally Sand Formation : Case Study from Talang Akar Non Marine Formation, North West Java
Full text linkWater saturation is one of the physical parameters of reservoir rocks that is important in determining the volumetric reserves of oil and gas fields. Several factors, including rock and fluid properties, also affect the diversity of water saturation values in reservoir rocks. One of the oldest methods, still used today, for determining Water Saturation values is the Archie method, which is based on the relationship between porosity, resistivity, and saturation. However, because reservoir rocks are heterogeneous, there are three (3) parameters that reflect rock characteristics: a (tortuosity factor), m (cementation exponent), and n (saturation exponent). The purpose of this study is to determine the Archie parameters a, m, and n in wells with shally sand lithology of the Lower Talang Akar Formation, and verify whether the water saturation value with the Archie equation is valid when applied to the well. The data used was obtained from the "Jeruk-2" well, in the form of well logs and core data (Routine Core Analysis and Special Core Analysis). As a result, it is found that the a and m values from the Jeruk-2 well were 1.47 and 1.81. The parameter n cannot be calculated because rock resistivity values at 100% brine saturation (Ro) are unavailable, so n = 2 is used following the literature. The calculation results using the Archie formula indicate that the water saturation in the Zone of Interest "Jeruk-2" ranges from 0.22 to 1.00. The results of this calculation are verified with the water saturation value from SCAL data, giving a correlation coefficient of 0.79. This shows that for shally sand lithology of the Talang Akar Non Marine Formation around the Jeruk-2 well, the Archie equation can be used to calculate water saturation using the Archie parameters a = 1.47, m = 1.81, and n = 2. However, it is still recommended to calculate the Archie parameters for each well and formation to get more accurate results
Analisis Pemilihan Elemen Water Sensitive Urban Design (WSUD) Kawasan Pinggir Sungai Kecamatan Rajabasa, Bandar Lampung
Full text linkRajabasa District in Bandar Lampung City is a strategically located area undergoing rapid development, primarily characterized by residential, educational, and transportation functions. However, unbalanced urbanization and inadequate environmental management have increased its vulnerability to flooding. In the past two years, floods have occurred due to river overflow during heavy rainfall, insufficient drainage infrastructure, and limited green open spaces for water absorption. These conditions underscore the urgency of adopting flood-adaptive planning strategies. This study investigates the potential application of the Water Sensitive Urban Design (WSUD) concept along the riverbanks in Rajabasa to enhance urban flood resilience. A mixed-method approach was employed, combining spatial analysis using GIS and field observations to assess existing conditions and identify priority areas for WSUD implementation, along with qualitative analysis of relevant literature and spatial planning documents. Findings reveal that the riverbank area is predominantly occupied by housing with low elevation, increasing the risk of water accumulation. To improve infiltration capacity, priority WSUD elements include rainwater storage tanks, raingardens, street trees/tree pits, swales (bioretention), permeable paving, and riparian buffers. Implementing these elements is expected to provide a foundation for flood-resilient urban planning and contribute to sustainable urban development.
Keywords: flood; riverside area; WSU
Pemanfaatan Fly Ash dan Bottom Ash (FABA) sebagai Substrat Alternatif dalam Transplantasi Karang Acropora di Pulau Pahawang
Full text linkDegradasi terumbu karang akibat perubahan iklim dan aktivitas manusia memicu perlunya upaya rehabilitasi. Saat ini upaya rehabilitasi yang umum dilakukan adalah transplantasi karang dengan substrat buatan. Penelitian ini mengevaluasi efektivitas Fly Ash dan Bottom Ash (FABA) sebagai substrat alternatif dibandingkan beton konvensional dalam transplantasi karang Acropora di Pulau Pahawang. Substrat dibuat dengan rasio beton:FABA (80:20) dan diuji terhadap parameter pertumbuhan dan tingkat kelangsungan hidup fragmen karang selama enam bulan. Hasil menunjukkan bahwa substrat berbasis FABA mendukung pertumbuhan karang lebih baik dibandingkan substrat beton, dengan nilai Geometry Mean Dimension (GMD) yang lebih tinggi secara signifikan (p < 0.0001). Selain itu, tingkat kelangsungan hidup karang pada substrat FABA mencapai 100%, lebih tinggi dibandingkan beton (85%). Keunggulan substrat FABA diduga berasal dari kandungan kalsium dan silika yang mendukung pembentukan kerangka kapur karang, serta keberadaan biofilm yang berperan dalam stabilisasi ekosistem mikro. Temuan ini menunjukkan bahwa FABA dapat menjadi alternatif yang lebih efisien dan ekonomis untuk substrat transplantasi karang, sekaligus menawarkan solusi pemanfaatan limbah industri secara berkelanjutan. Namun, penelitian lebih lanjut diperlukan untuk mengkaji dampak jangka panjang FABA terhadap ekosistem laut.
Kata kunci: Kontak Horison, Kalsifikasi, Substrat Buatan, Biofilm
A GREEN ECTRACTION TECHNOLOGIES FOR COSMETIC-GRADE AVOCADO OIL FOR SUSTAINABLE COSMETIC APPLICATIONS: A REVIEW
No full textAvocado oil has gained increasing attention as a functional lipid ingredient in cosmetic formulations due to its superior emollient performance and high content of unsaturated fatty acids, phytosterols, and natural antioxidants. The shift toward sustainable manufacturing has stimulated the development of green extraction technologies capable of producing cosmetic-grade avocado oil while preserving its bioactive quality. This review critically examines recent advances in avocado oil extraction, comparing conventional methods such as cold pressing and solvent extraction with emerging technologies including supercritical and subcritical carbon dioxide extraction, ultrasound-assisted aqueous extraction, microwave-assisted extraction, and enzyme-assisted processes. The influence of extraction conditions on oil yield, free fatty acid content, oxidative stability, and retention of functional compounds is discussed based on peer-reviewed studies from the last decade. Attention is given to the suitability of each technique for cosmetic-grade applications, considering solvent safety, thermal degradation, energy efficiency, and alignment with green chemistry principles. Current findings indicate that assisted and CO₂-based extraction methods offer higher oil purity and improved preservation of bioactive components with lower environmental impact. However, challenges remain in process scalability, cost effectiveness, and the lack of standardized quality specifications for cosmetic-grade avocado oil. Future research directions are proposed to support industrial implementation of sustainable extraction strategies and to establish consistent quality benchmarks for green chemistry-based cosmetic formulations. This review provides a comprehensive reference for researchers and cosmetic manufacturers seeking to integrate green extraction technologies into sustainable product development
Penyuluhan Pembuatan Produk Nutrasetika Madu Klanceng untuk Mendukung Budidaya Lebah Trigona Lokal
No full textMadu klanceng diproduksi dari lebah tanpa sengat, lebah trigona. Meski banyak penelitian menunjukkan aktivitas farmakologi Madu klanceng lebih kuat dibandingkan madu spis, masyarakat cenderung tidak menyukai rasa dari madu ini yang lebih asam. Tiga dari empat keluarga di lingkungan RW 09 Kelurahan Yosorejo membudidayakan lebah trigona untuk mendapatkan madunya. Karena itulah, Pengabdian Kepada Masyarakat ini bertujuan untuk memberikan pengetahuan kepada masyarakat mengenai cara pembuatan Produk Nutrasetika berbahan dasar madu klanceng, yaitu “Infusa Herbal dengan Madu (Herb-Infused Honey)”, “Madu Jelly (Honey Jelly)” dan “Keripik Granola-Madu (Hanola Bar)”. Selama tahap persiapan, dilakukan optimasi formulasi produk dan uji kestabilan penyimpanannya secara pengamatan visual. Pada pelaksanaan, masyarakat diberikan informasi tentang manfaat madu klanceng, demonstrasi pembuatan produk, dan informasi terkait strategi pemasaran. Analisis statistik terhadap hasil pre-test dan post-test menunjukkan peningkatan pengetahuan warga secara signifikan antara sebelum dan setelah dilakukannya penyuluhan. Warga diharapkan dapat mengaplikasikannya untuk meningkatkan penjualan madu klanceng
PEMILIHAN SAMPAH DI ITERA 2023: MEMBANGUN BUDAYA LINGKUNGAN BERSIH DAN BERKELANJUTAN
No full textThe community service programme entitled ‘Waste Sorting in ITERA 2023: Building a Culture of Clean and Sustainable Environment’ aims to increase awareness and participation of ITERA academic community in effective and environmentally friendly waste management. This activity was motivated by the increasing volume of waste in the campus environment and the need for more structured waste management to support the sustainability of the ecosystem. Through an educational approach and direct action in the field, this programme educates students, staff, and the surrounding community about the importance of sorting organic and inorganic waste, as well as waste utilisation through recycling and composting. The results showed that there are many variations of waste generated by the academic community on the ITERA campus. In addition, this program succeeded in analysing the amount of waste generated by the ITERA campus as well as increasing the awareness of students as the younger generation of the potential of waste and the importance of processing waste more wisely. With the success of this programme, ITERA is expected to become a role model for other educational institutions in terms of environmental management and waste reduction