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Effect of Methanol–NaOH Catalyst Variations on the Properties and Engine Performance of B50 Biodiesel from Waste Cooking Oil
Oleh: Suardi, Suardi, Hariyono, Hariyono, Mahmuddin, Faisal
The growing demand for environmentally friendly fuels has encouraged the use of biodiesel as an alternative to fossil diesel. This study explores the production of B50 biodiesel derived from waste cooking oil using the transesterification method, with two catalyst variations: (1) 1000 mL methanol + ...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
The Potential of Bacillus sp. and FOBIO Biopesticide with Mustard Greens (Brassica rapa L. var. parachinensis) as Bioremediation Agents for Cadmium
Oleh: Setyawan, Dykha Maretha, Prasetyawati, Endang Tri Wahyu, Wiyatiningsih, Sri
Cadmium (Cd) contamination in agricultural land due to excessive use of fertilizers and pesticides has detrimental effects on soil quality, plant growth, and human health. Bioremediation offers a simple and environmentally friendly approach to address this issue. This study aimed to evaluate the pot...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Flood Study of Sungai Penuh City in the Batang Merao Watershed (Case Study: Hamparan Rawang District)
Oleh: Firmana, Ary, Nugroho, Eka Oktariyanto, Prasetiyo, Aziz Rizal
In January 2024, a major flood from Batang Merao River occurred in Sungai Penuh City, submerging residential areas and agricultural land to a depth of 0.5–1.5 m. One of the most severely impacted areas was Hamparan Rawang District with a total of 3985 houses and 866.025 ha of agricultural land inu...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Genetic Variability of Lumbu Kuning and Lumbu Hijau Garlic Varieties Induced by ⁶⁰Co Gamma Ray Irradiation
Oleh: Novitasari, Adin, Adiredjo, Afifuddin Latif, Soetopo, Lita
Garlic has limited genetic variability because the offspring are phenotypically identical to the parent plant. One approach to increase variability is mutation breeding using gamma irradiation. This study aimed to evaluate the effects of different gamma-ray doses on growth characteristics, physiolog...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Comparative Evaluation of Manual and Herbicide-Based Weed Control in the Immature Oil Palm Phase
Oleh: Harahap, Heru Wansyah, Hartini, Hartini
Weeds become major constraint in oil palm plantations as they compete for nutrients, light, and water, thereby extending the non-productive period. This study aimed to evaluate the effectiveness of weed control methods on the dominant weed species in the immature oil palm plants (TBM). The research ...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Design of Internet of Things (IoT)-Based Control System on a Hybrid Drying Machine for Sengon Wood Pallets
Oleh: Chan, Yefri, Sofyan, Suzuki
This study aims to design and build a sengon wood pallet drying system with an Internet of Things (IoT) based system as a monitoring and control of drying parameters such as temperature, humidity and reduction of wood mass during the drying process. Drying of sengon wood pallet samples using a combi...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Design and Development of a Web-Based Thermal Application for Vapor Compression Refrigeration Systems
Oleh: Dewi, Ratu Yanra, Yulianto, Muhamad, Solahudin, Mohamad
The growth of the global food industry has led to an increased demand for cold storage systems to maintain product quality. Cold storage systems based on the vapor compression cycle offer high energy efficiency. However, their design involves multiple stages, ranging from cooling load calculations t...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
The Use of Botanical Preservatives to Maintain the Quality of Smoked Catfish
Oleh: Saputra, Edo, Hasbullah, Rokhani, Darmawati, Emmy
The use of botanical preservatives in smoked catfish is a natural approach to maintaining quality during initial storage through the antioxidant and antimicrobial activities of its bioactive compounds. This study aims to examine the effect of garlic, red ginger, and red galangal extracts in maintain...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Design and Performance Evaluation of an IoT-Based Automatic Airflow Control System for a PV/T Solar Dryer with Silica Gel Adsorption Heat Storage
Oleh: Oktavionry, Putri Arsyafdini, Nelwan, Leopold Oscar , Subrata, I Dewa Made
Solar energy is one of the most promising renewable energy sources, yet solar drying operating costs often remain prohibitive for small-scale farming. This research aims to design and evaluate the performance of an automated air flow control system for a PV/T collector integrated with an adsorption ...
Penerbit: The University of Lampung • Publikasi: 06 February 2026
Beyond Curiosity: The Role of Inquisitiveness in Managing Epistemic Uncertainty and Problem-Solving Difficulties among Pre-Service Elementary Teachers
Oleh: Hadi, Fida Rahmantika, Mulyadi, Mulyadi
This study investigates the relationship between inquisitiveness and problem-solving difficulties among pre-service elementary school teachers when solving mathematical problems containing contradictory information. The aim is to identify how different levels of inquisitiveness influence cognitive, ...
Penerbit: FKIP Universitas Lampung • Publikasi: 06 February 2026