Pengolahan tomat segar menjadi suatu produk selain mampu mempertahankan daya simpannya juga mampu meningkatkan nilai jual dari tomat segar. Penggunaan jenis gula yang berbeda pada pengolahan tomat memberikan hasil yang berbeda pula terhadap karakteristik dan penerimaan panelis dari kurma tomat. Hasil analisa kadar air menunjukkan bahwa penggunaan gula pasir memiliki nila kadar air terendah yaitu 13,8%, tingkat keasaman 5,31 dan mampu mempertahankan tingkat vitamin C setelah pengolahan sebesar 60,25%. Sedangkan penggunaan gula merah pada kurma tomat menghasilkan nilai kadar air sebesar 14,8%, tingkat keasaman 5,84 dan hanya mampu mempertahankan kadar vitamin C setelah pengolahan sebesar 37,82%. Hasil analisa terhadap tingkat penerimaan dari kurma tomat menunjukkan bahwa kurma tomat dengan penggunaan gula pasir lebih disukai dibandingkan dengan penggunaan gula merah.
ABSTRAKPati ubi jalar ungu dikenal dengan kandungan antosianin serta memiliki kandungan karbohidrat terutama pati yang tinggi. Ekstraksi pati pada ubi jalar ungu dapat menyebabkan terjadinya browning karena adanya enzim PPO yang mengakibatkan menurunnya kandungan antosianin dalam pati yang dihasilkan. Asam askorbat dapat digunakan sebagai salah satu agen anti browning. Rancangan penelitian menggunakan RAL (Rancangan Acak Lengkap) Faktorial dengan perlakuan variasi penambahan asam askorbat dan variasi lama pengeringan. Hasil analisa yang diperoleh yaitu pengeringan pati ubi jalar ungu dapat dilakukan selama 4 jam karena pada lama waktu tersebut kadar air telah konstan untuk lama pengeringan selanjutnya. Kandungan antosianin pati ubi jalar ungu menurun dengan bertambahnya konsentrasi penambahan asam askorbat, namun penambahan asam askorbat menyebabkan peningkatan antioksidan pati ubi jalar ungu karena asam askorbat merupakan salah satu jenis antioksidan.Kata Kunci: antioksidan,antosianin,pati ubi jalar ungu ABSTRACT Purple sweet potato starch is known for its anthocyanin content and has a high carbohydrate content, especially starch. Starch extraction in purple sweet potato can cause browning due to the presence of PPO enzymes which results in decreased anthocyanin content in the resulting starch. Ascorbic acid can be used as an anti-browning agent. The analysis results obtained are the drying of purple sweet potato starch can be done for 4 hours because at that time the water content has been constant for a long time of further drying. The anthocyanin content of purple sweet potato starch decreases with increasing concentration of the addition of ascorbic acid, but the addition of ascorbic acid causes an increase in antioxidants of purple sweet potato starch because ascorbic acid is one type of antioxidant.
Papain enzyme has been applied in the production of coconut oil. In this study, crude papain enzyme was coated with maltodextrin to observe the effectiveness of coated papain in the production of virgin coconut oil (VCO). The specific objectives of this research including to determine the effect of the incubation length and temperature of the coated papain enzyme on the yield and quality of the resulting VCO. 0.5% enzyme (w/v) was applied to the coconut milk in different incubation lengths and temperatures to produce VCO. This study applied a randomized complete design with two factors; length of incubation (6,12,18, and 24 hours) and incubation temperature (30, 40, 50 and 60 ⁰C). The findings of this study showed that based on a yield of 24.88% and a degree of clarity of 92.15%, the optimal incubation temperature for the production of VCO in this study was 50 ⁰C. The findings of the research, based on a yield of 22.56%, showed that 18 hours of incubation was found to be the optimal incubation time for the production of VCO in this study. Even though the free fatty acids and water content suggest that refinement is necessary for the quality improvement of the produced VCO, the peroxide value and iodine number of VCO in this study show a good quality with a value of fewer than three meq/kg and between 5.78-8.80, respectively.
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