Fresh-cut tropical fruit is increasingly popular currently, stimulated by public awareness of health and practical lifestylefresh-cut fruit presenting consumers' convenience, safety, and quality. Tropical fruit contains functional components that are quite varied and good for health. Mangosteen, Mango, and Rambutan are three exotic tropical fruits that have high economic value and are liked by foreign people. They have a nonedible relatively high and potentially processed into fresh-cut fruit-the process of stripping cutting and slicer, causing wounds that spur damage. During storage, fresh-cut fruits undergo physical-chemical changes-increased respiration rate, ethylene production, oxidation, and browning processes that can shorten shelf life. The damage will be faster if stored at an improper temperature. Fresh-cut fruit is preferably stored at cold temperatures, to extend the shelf life. The research aims to determine the physicochemical characteristics of fresh-cut tropical fruits during cold storage. The research uses a pattern of random group three replicate. The first factor is fruit type (Mango, Mangosteen, Rambutan); the second factor is storage time in cold temperatures (0, 5, 10 days). The variables observed in the study included physical characteristics color (L*a*b*), weight, and texture. Observations of chemical characteristics include moisture content, pH, total acids, vitamin C levels, and total dissolved solids. Freshcut tropical fruit has different physicochemical characteristics and experiences deterioration during cold temperatures. The characteristics of tropical fruit have changed significantly on day 5. Mango shows more significant changes than others, seen from variable moisture content, vitamin C, color, and texture. Meanwhile, based on the physicochemical analysis, rigidity of fresh-cut Mango higher than Mangosteen and Rambutan.

Edible coating has long been known as an alternative to extend the fruit shelf life. One of the natural ingredients that can be used as an edible coating is an aloe gel which rich in functional components. The activity of aloe gel enzymes is very high. To maintain stability should be stored at the right temperature. The purpose of this research is to know the stability of aloe gel as an edible coating that is reviewed from treatment of temperature and length of storage. The study uses a complete randomized design of factorial patterns consisting of two factors: the first factor of the storage temperature (28°C and 7°C) and the second factor is storage time (0, 2, 4, 6, and 8 days). The observed variables include colour, pH, moisture, viscosity, and total microbes. The stability of the edible aloe gel coating is best obtained from the temperature treatment 7°C with the duration of storage 4 days.

Edible coating is biodegradable and eco-friendly packaging that current developments. Constituent components of edible coatings in the form of hydrocolloid (polysaccharides, proteins), lipids and composite. The edible coating serves as a protective material which is packed from outside influences also functions as a matrix of antimicrobial agents. Synthetic preservatives that many outstanding raises concerns of the community to use it, because of the high risk on health. One of the potential natural ingredients as an edible coating and also as a natural preservative is aloe vera gel. Edible coating of aloe vera (ECOGEL). Consists of polysaccharide that contains many components of bioactive, but the disadvantage easily becomes diluted. Aloe Vera gel should be kept on the proper environmental conditions. The purpose of this study was to determine the effect of incorporation of various types of additives (citric acid, ascorbic acid, potassium sorbate) on the chromatic characteristics of Aloe gel as an edible coating for 15-day storage. This study used a completely randomized design. The results showed that the best chromatic attributes of Aloe gel were the incorporation with citric acid, ascorbic acid, and potassium sorbate.

Biofoam merupakan salah satu produk bioplastik yang dikembangkan untuk mengurangi penggunaan plastik saat ini. Biofoam yang terbuat dari matriks utama dapat berasal dari bahan polimer alam yang dapat membentuk gel dan membentuk busa seperti sorbitol dan diisosianat (poliuretan). Penelitian ini bertujuan untuk mengetahui pengaruh perbandingan sorbitol. dan TDI-80 pada karakteristik biokomposit busa pati jagung-glukomanan dan menentukan perlakuan terbaik. Rancangan percobaan ini menggunakan metode Rancangan Acak Lengkap dengan 5 perlakuan dan 4 ulangan. Data dianalisis keragamannya dan dilanjutkan dengan uji Beda Nyata Terkecil Tuckey. Hasil penelitian menunjukkan bahwa perbandingan poliuretan berpengaruh sangat nyata terhadap densitas massa, kekerasan, pegas reflektif, tegangan putus, perpanjangan putus, ketahanan sobek dan kompresi konstan. Biokomposit busa pati jagung-glukomanan terbaik diperoleh pada perlakuan rasio sorbitol 70:30 dan TDI-80 dengan nilai rata-rata densitas rata-rata 0,09 g/mL, kekerasan 6,14 kg, pegas reflektif 19,93%, tegangan putus 0,21 N/mm2, elongasi saat putus 6,53%, ketahanan sobek 0,15 N/cm3, Kompresi tetap pada 4,90% dan terdegradasi rata-rata 7,25 hari. Bioplastik yang dihasilkan pada penelitian ini telah memenuhi standar SNI 06-1004-1989 pada variabel uji kekerasan dan tekan serta standar ASTM 5998 pada variabel panjang degradasi.Kata kunci: biofoam, sorbitol, TDI-80, Maizena, glukomanan

The use of geomembrane plastic in salt production has been effectively used since 2012. Geomembrane plastic can increase the growth of salt production by almost 100%. Geomembrane plastic is a relatively thin, interconnected polymer sheet. Geomembrane plastic is used repeatedly for approximately two years and is exposed to sunlight. This research was conducted to determine the traces of geomembrane polymer components in salt dried in the sun using a geomembrane plastic drying mat. UV-Visible was used to detect the presence of traces of polymer components and determine the functional groups of polymer components using FTIR spectroscopy. The results of the UV-Visible identification of salt water and polluted distilled water showed the presence of two migrating chemical elements and the FTIR identification of the samples showed absorption peaks at 3874-3209 cm?¹ O-H, 3059-2782 cm?¹ C-H, 1709-1509 cm?¹ C=C, 1378 cm?¹ CH and 1224-1068 cm?¹ C-C. The geomembrane plastic molecules that are thought to migrate to the salt are the HDPE copolymer and the antioxidant additive Irganox 1330.