Characterization of Chitosan-Based Active Film with Addition of Young Coconut (Cocos nucifera) Leaf Extract

This research was aimed to investigate the potential of young coconut (Cocos nucifera L.) leaf extract as an antioxidant and antibacterial active compounds. In this study, the physical, mechanical, antioxidant, and antibacterial activity of chitosan-based film with addition of young coconut leaf extract were examined. The young coconut leaf extract was prepared by maceration using ethanol for 48 hours at room temperature. The antioxidant and antibacterial activities were determined by the DPPH and well diffusion methods, respectively. The total phenolic and flavonoids were analyzed using spectrophotometric method. The film was prepared using 1.0 and 1.5% chitosan solution added with young coconut leaf extract at 0, 0.1, and 0.3%. The characterization of the film included color, tensile strength, elongation, WVP, film morphology, identification of functional groups, and total phenolic and antioxidant activity release. The results showed that the antioxidant activity of young coconut leaf extract was IC50 of 58.61 ppm. The antibacterial activity test showed that the inhibitory zone for S. aureus, Salmonella sp., and E. coli were 17,66, 24.40, and 12.27 mm, respectively. Total phenolic and flavonoid contents were 129.27 mg GAE/g extracts and 3.92 mg QE/g extract, respectively. The color of the film was dark. The higher the concentration of chitosan and the young coconut leaf extract, the higher the tensile strength, whereas the value of elongation at break and water vapor permeability decreased. The release of total phenolic was higher in lipophilic food simulants than in an aqueous system. The result of the study reveals that chitosan-based film added with young coconut leaf extract had great potential as an active biodegradable film for food packaging systems.

Analisis Perhitungan OEE dan Menentukan Six Big Losses pada Mesin Spot Welding Tipe X

Penelitian ini berisi tentang meningkatkan efektivitas mesin las tipe x spot, dengan menggunakan metode Overall Equipment Effectiveness dan Six Big Losses. Tahap pertama adalah mencari nilai Efektivitas Peralatan Keseluruhan dan kemudian mengidentifikasi faktor Six Big Losses. Penggunaan Overall Equipment Effectiveness dan Six Big Losses untuk menentukan nilai Overall Equipment Effectiveness dan faktor dominan yang menyebabkan rendahnya kinerja mesin atau peralatan. Tujuan dari penelitian ini adalah untuk mengetahui nilai Overall Equipment Effectiveness untuk mesin las spot tipe x, mengetahui faktor-faktor yang menyebabkan rendahnya kinerja mesin dan memberikan saran perbaikan untuk meningkatkan kinerja mesin di PT. XYZ. Berdasarkan pengolahan dengan metode Overall Equipment Effectiveness dan Six Big Losses didapatkan nilai Overall Equipment Effectiveness dan mengidentifikasi faktor-faktor yang menyebabkan rendahnya kinerja mesin. Nilai Efektivitas Peralatan Keseluruhan pada mesin las tipe x spot adalah 70,861% yang dipengaruhi oleh salah satu faktor Six Big Losses, yaitu Kualitas Kerusakan dan Kerusakan Pengerjaan Ulan