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Allium sativum L. protease still remains largely understudied although new varieties of garlic appear quite often, e.g., lanang garlic. This study tested the antibacterial effect of garlic and the effectiveness of various A. sativum proteases as meat tenderizers. The research involved powder extracts of four varieties of A. sativum: kating, lanang, black garlic, and sin-chung. The degradation kinetics was defined based on the Lineweaver-Burk equation. The degradation zones were measured using sodium dodecyl sulphate poly acrylamide gel electrophoresis (SDS-PAGE). Scan electron microscopy served to test the changes in meat connective tissue. Lanang demonstrated the largest inhibition zones against Escherichia coli (9.75 ± 0.15 mm) and Staphylococcus aureus (1.04 mm). Sin-chung protease degraded beef protein with the highest Vmax of 0.1818 µg/µL/min at 10–22 KDa (small peptide, troponin C, and troponin I), 25–40 KDa (myosin light chain, troponin T, α and β tropomyosin, actin), and 100–140 KDa (protein C). The same garlic variety degraded mutton meat protein at 10–17 KDa (small peptide) and 25–40 KDa (myosin light chain, troponin T, α and β tropomyosin, actin) with Vmax of 0.1135 µg/µL/min. All four A. sativum proteases proved to be quite effective meat tenderizers.

Introduction. Klanceng honey (Tetragonula laeviceps) is in great demand because of its benefits. There is no information on the expiration date of the Klanceng honey. Objective. To predict the shelf life of Klanceng honey by evaluating the effect of heating (40 ºC / 48 h and 70 ºC / 7 h) and storage for two years. Materials and methods. The analysis was carried out three times (2020, 2021, and 2022) at the National Innovation Research Agency Laboratory, Jakarta, Indonesia. Samples of Klanceng honey (Tetragonula laeviceps) were taken from a bee farm in Magetan, East Java, Indonesia. The sample (5 kg) was divided into 3: without heating process (UT), heating at 40 ºC / 48 h (T1), and heating at 70 ºC / 7 h (T2). Then analyzed the activity of HMF, diastase, invertase, acid phosphatase (AP), glucose oxidase (GO), DPPH, honey color, and phenolic at 0, 12 and 24-months. Results. The results showed that short heating at high temperature (70 ºC / 7 h) had a greater impact on decreasing enzyme activity compared to prolonged heating at low temperature (40 ºC / 48 h). Storage had a major impact on the increase of 5-hydroxymethyl (furan)-2-carbaldehyde (HMF) compared to the heating process. During storage (24-months) the HMF value exceeded the maximum limit. Conclusions. The HMF value (55.33 ± 0.57 mg/kg) exceeded the maximum allowable limit (max 40 ppm), this was due to the significant effect of heating on T2 and the storage process. The shelf life of Klanceng honey was two years, as long as it was not heated to high temperatures (70 ºC).

Background: This research was motivated by the determination of the sanitation schedule in the heat exchanger area for some products (milk, avocado juice, and orange juice), as well as the inconsistency of the results of previous studies related to the chemical composition of the fouling layer. Objectives: a) to test the effect of raw material composition on the chemical composition of the fouling layer. b) to test microbial growth's effect on fouling's chemical composition (protein). Methods: mathematical derivation of the formation process of Resistant Dirt Factor (Rd) in the form of an Equation; ANOVA was used to test the effect of the dependent variable (protein) and predictor (microbial). Results: a) The composition of the raw material strongly influences the chemical composition of the fouling layer; b) There is a strong effect between microbial growth and protein content as a fouling composition (p

Background: This research was motivated by the complaints of tomato farmers about their crops that quickly rotted before being sold, as well as the many research results (raw materials and methods) that edible coating films could not be applied optimally. Objectives: The research was a practical recommendation by comparing the effectiveness of raw materials (polysaccharides, proteins, and lipids) with the dipping and spray methods. Materials and methods used in the comparison process were the application of Structural Equation Modeling (SEM) with the Partial Least Square (PLS) approach. Results: Dipping has a strong effect (f2 ≥ 0.35; p