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This study aims to determine the optimal pectinase enzyme concentration and hydrolysis duration for the most preferred physical, chemical, and organoleptic characteristics of kweni mango syrup. The research was conducted from October 2024 to August 2025 at the Integrated Laboratory and Basic Science Laboratory of the Agricultural Institute (INTAN) Yogyakarta using a Completely Randomized Design (CRD) with a factorial pattern consisting of two factors and two replications. The first factor was the pectinase enzyme concentration (0%, 0.25%, 0.50%, and 0.75%), and the second factor was the hydrolysis duration (0, 30, and 60 minutes). Observation parameters included yield, vitamin C, viscosity, pH, total soluble solids, and organoleptic attributes. Data were analyzed using ANOVA at a 5% significance level followed by Duncan’s Multiple Range Test (DMRT). The results showed significant effects of both pectinase enzyme concentration and hydrolysis duration on yield, viscosity, total soluble solids, and organoleptic characteristics (color, taste, aroma, and overall acceptability), while no significant effects were observed on vitamin C content and pH. The best formulation was obtained using 0.50% pectinase enzyme concentration with a hydrolysis duration of 30 minutes.

Low frequency and minimal practicum facilities have become the main problems in the implementation of science learning at SMP Negeri 1 Sambi, Boyolali. According to the Minister of National Education Regulation Number 24 of 2007, the learning process requires facilities and infrastructure that support optimal implementation. The benefits of science practicum include increasing students’ motivation to learn science and providing opportunities for them to satisfy their curiosity through scientific approaches. The purpose of this research is to examine the implementation of science practicum and to evaluate the quality of the facilities and infrastructure of the science laboratory at SMP Negeri 1 Sambi, Boyolali. This study used a descriptive qualitative method with data collected through observation, documentation, interviews, and questionnaires. The results show that the quality of facilities and infrastructure for science practical activities at SMP Negeri 1 Sambi, Boyolali is classified as good, as stated in the Minister of National Education Regulation Number 24 of 2007, with an average percentage of 71.62%. The implementation of science practicum is categorized as very good, with an average percentage of 97.8%. The results of the questionnaire also show that 93.4% of the science practicums fall into the very good category, meaning that the implementation of science practicum for Grade VIII in the odd semester runs well.

This study aims to analyze the strategy of natural science laboratory management in improving the quality of practicums in senior high schools. This study uses a literature review approach by examining various academic sources related to laboratory management. The results of the analysis indicate that effective laboratory management includes five main strategies, namely management of equipment, materials, data, laboratory personnel training, and cost budgeting. The success of implementing this strategy depends on the implementation of supporting factors such as work safety, infrastructure quality, personnel capabilities and excellent data management systems. However, there are still many obstacles, including limited facilities and infrastructure, lack of professionals, inadequate budgets, and optimal planning and implementation of practices. Comprehensive improvements in laboratory management are expected to enable learning science to be implemented in a more optimal and sustainable manner.