Banana peel is a biomass waste that has the potential to be used as charcoal briquettes. Banana peels contain lignocellulose, including 58.5% lignin, 41.8% cellulose and 38.1% hemicellulose, which are the main ingredients that must be present in the raw material for charcoal briquettes. This study aims to identify the characteristics of charcoal briquettes produced based on the Indonesian National Standard (SNI). The adhesive used is sago flour with a concentration of 5%, 10%, and 15% in 100 g of charcoal briquette raw material. The results obtained were the best adhesive concentration used, namely 5%. By testing, it obtained several characteristics that meet the SNI, including a density of 0.5957 g/cm3 , a compressive strength of 4.8920 kg/cm2 , and a calorific value of 10,815.9437 cal/g. At the same time, the characteristics that did not meet SNI were water content of 8.465%, ash content of 27.850%, volatile matter content of 46.967% and bound carbon content of 25.183%.

This study aimed to determine the levels of vitamin C, calcium and phosphorus of the preserved chili pepper. In this research, two preservation techniques were applied, cooling and drying. For analysis of vitamin C was used the iodometric method, the results obtained in the technique of cooling was 11.08 mg/100 g and the drying technique was 9.85 mg/100g. For calcium and phosphorus analysis was analyzed by using the spectrodirect instrument, research result obtained for calcium in the cooling technique was 20.00 mg/L and the drying technique was 12.33 mg/L while for phosphorus of the cooling technique was 27.66 mg/L and the drying technique was 55.16 mg/L.

AIM: This study aimed to evaluate the quality of biscuits formulated using chayote and mung bean flours to be used as health food products. METHODS: The thermogravimetric method was used to analyses proximate evaluation for moisture content, the dry ashing method was used to analyses ash content, and the Soxhlet method was used to analyses fat content. Crude protein was measured using the spectrophotometric method, while mineral content was measured using the atomic absorption spectrophotometric method. RESULTS: Proximate analysis obtained the highest water content value in F3 (5.298%) and the lowest in F5 (2.118%). The highest value of ash content was in F1 (2.87%) and the lowest was in F5 (1.42%). The highest value of carbohydrate content was in F5 (59.88%) and the lowest was in F2 (53.68). The highest value of fat content was in F1 (32.64%), and the lowest was in F5 (24.33%). The highest amount of protein content was in F5 (12.25%) and the lowest was in F1 (5.65%). Mineral analysis obtained the highest value of potassium content in F5 (429.12%) and the lowest in F1 (142.22%). The highest value of calcium levels was in F5 (69%) and the lowest was in F2 (26.8%). The highest amount of sodium levels was in F5 (417.39%). The highest iron content value was in F5 (14.06). CONCLUSIONS: The quality of the biscuit products made from chayote flour, green bean flour, and both formulations are in the good category with indicators that are acceptable for human consumption because they have high macronutrients and minerals.

Phaleria macrocarpa contains secondary metabolite compounds such as alkaloids, terpenoids, saponins, polyphenols, tannins, sterols, and coumarins. Those metabolites are antioxidants and can be efficacious in the healing of various degenerative diseases such as cervical cancer and diabetes. This plant is widely grown in Tindaki Village, Parigi Mautong, Central Sulawesi. The aim of this study was to determine the antioxidant power of those phaleria macrocarpa fruit extract. This study was conducted by using maceration extraction technique with ethanol as solvent, and compound 2,2-difenil-1-picrilhidrazil (DPPH) as source of free radical, and vitamin C as the positive control. The UV-Vis spectrophotometer was used to measure the absorbance of the extract. Various concentrations of the extract used were 5 ppm, 15 ppm, 25 ppm, and 35 ppm. The results showed that the IC50 value of the fruit extract was 28.242 ppm, while the IC50 value of vitamin C was 19.302 ppm. These IC50 values show that vitamin C was a stronger antioxidant activity than the fruit extract, but the fruit extract was still as a very strong natural antioxidant category.

Durian peels is a biomass waste that can be used as an alternative fuel in charcoal briquettes. Durian peels contains combustible materials, namely high cellulose (50%-60%) and lignin (5%) and low starch (5%). This study aims to determine the characteristics of charcoal briquettes from durian skin waste using adhesive from sago starch as an alternative fuel. The adhesive used is adhesive from sago flour, which is 3% of the weight of the charcoal used. In this study, 500 g of charcoal was used, so that the adhesive used was 15 g. The results of testing the quality of briquettes products made from durian peels obtained calorific value (5189.128 Cal/g), moisture content value (3.6044%), ash content value (3.5643%), volatile matter value (21.1273%), and the value of bounds carbon content (69.2279%), density (0.4778 g/cm3), combustion rate (0.22 g/second). Briquettes produced from durian skin waste using starch from sago as an adhesive can be used as an alternative fuel that is environmentally friendly