Abstrak.Penelitian ini bertujuan untuk melihat lama umur simpan buah tomat dengan menggunakan lapisan gel lidah buaya (Aloe vera L.) dengan berbagai variasi konsentrasi dan variasi suhu penyimpanan.Penelitian ini menggunakan tomat dengan tingkat kematangan optimum. Pada variasi konsentrasi gel lidah buaya (A) terdiri atas 4 perlakuan, yaitu tanpa gel lidah buaya (A1), konsentrasi 30% (A2), konsentrasi 50% (A3) dan konsentrasi 70% (A4), dan variasi penyimpanan yaitu suhu penyimpanan (B) terdiri atas 2 perlakuan, yaitu suhu B1 suhu ruang  (28oC) dan  B2 (suhu rendah 10oC ). Analisa data yang diamati meliputi susut bobot, kekerasan, vitamin C, total padatan terlarut, dan uji organoleptik (warna, tekstur, dan aroma).Dari hasil penelitian didapatkan perlakuan terbaik pada tomat dengan perlakuan konsentrasi gel lidah buaya 30% pada penyimpanan suhu rendah 10ºC masih diterima konsumen hingga hari ke 21. Penyimpanan perlakuan terbaik pada hari ke-12 untuk analisis susut bobot terdapat pada perlakuan konsentrasi gel lidah buaya 30% yang disimpan pada suhu 10ºC dengan nilai 15,52%, untuk analisis presentase kekerasanperlakuan terbaik terdapat pada konsentrasi 30% pada suhu rendah 10ºCnilai yaitu 1.357kg/cm2, dan analisis vitamin C perlakuan terbaik terdapat pada konsentrasi 30% pada suhu rendah 10ºCnilai 1,42 mg/50gr, sedangkan TPT perlakuan terbaik terdapat pada suhu rendah 10ºCdengan perlakuan tanpa konsetrasi gel lidah buaya nilai presentase yaitu 4,40 %Brix. Dari hasil pengujian organoleptik, panelis menolak tomat dengan perlakuan konsentrasi gel lidah buaya 30% yang disimpan pada suhu ruang 28oC pada hari penyimpanan ke-12, sedangkan pada penyimpanan suhu rendah 10oC panelis menolak tomatdengan konsentrasi gel lidah buaya 30%pada hari penyimpanan ke-21.Abstract. This study aimed to look at the old the shelf life of tomatoes by using the layer of gels of aloe vera (Aloe vera L.) with various concentrations and a temperature variations in of storage.This study uses the tomatoes with optimum maturity level. In a variation of concentration of aloe gel (A) composed of 4 treatment, ie without aloe vera gel (A1), the concentration of 30% (A2), the concentration of 50% (A3) and a concentration of 70% (A4), and a variety of storage ie storage temperature (B) consisting of two treatments, namely B1 temperature room temperature (28oC) and B2 (low temperature 10oC). Analysis of observed data include weight loss, violence, vitamin C, total dissolved solids, and organoleptic (color, texture, and aroma). From the results, the best treatment in tomatoes by treatment with 30% aloe vera gel at low temperature storage is still acceptable to consumers 10ºC until the 21st day storage best treatment on day 12 for analysis of weight loss treatment concentration contained in aloe vera gel 30% stored at a temperature of 10ºC with a value of 15.52%, for the analysis of the percentage of violence are the best treatment at a concentration of 30% at low temperature 10ºC value is 1,357 kg / cm2, and the analysis of vitamin C are the best treatment at a concentration of 30% at low temperature 10ºC value 1.42 mg / 50gr, while TPT best treatment there at low temperature 10ºC with treatment without concentration of aloe gel percentage value that is 4.40% Brix. From the results of organoleptic tests, the panel rejected the tomatoes by treatment with 30% aloe vera gel is stored at room temperature 28oC on the 12th day of storage, while the low temperature storage 10oC panelists refused tomatoes with aloe vera gel concentration of 30% on the day of deposit of the 21.

Abstrak. Tujuan penelitian ini adalah untuk mengetahui karakteristik tepung labu kuning.   Parameter penelitian meliputi rendemen, kadar air, derajat keasaman (pH), kadar pati, uji organoleptik hedonik warna dan aroma. Data di analisa menggunakan ANOVA dan  excel. Hasil penelitian menunjukkan  nilai rata-rata rendemen tepung labu kuning tertinggi terdapat pada perlakuan 0 menit yaitu 11,33%, nilai rata-rata kadar air tepung labu kuning tertinggi terdapat pada perlakuan 60 menit yaitu 9,33%, nilai rata-rata derajat keasaman (pH) tertinggi terdapat pada perlakuan 0 menit yaitu 6,79,  nilai rata-rata kadar pati tertinggi terdapat pada perlakuan 40 menit yaitu 72,95%, nilai rata-rata uji organoleptik hedonik warna tertinggi terdapat pada perlakuan 60 menit yaitu 4,20 dengan skor 4 (suka), nilai rata-rata uji organoleptik hedonik aroma tertinggi terdapat pada perlakuan 0 menit yaitu 3,71 dengan skor 4 (suka).The Effect of soaking time in sodium metabisulfite solution on the characteristics of pumpkin Abstract. The purpose of this study was to determine the characteristics of pumpkin flour. The research parameters included yield, moisture content, acidity (pH), starch content, hedonic organoleptic color and aroma test. Data was analyzed using ANOVA and Excel. The results showed that the highest yield of pumpkin flour was at 0 minutes treatment which was 11.33%, the highest average value of water content of pumpkin flour was at 40 minutes treatment which was 9.33%, the average value of acidity degree (pH) is highest in 0 minute treatment, which is 6,793, the highest average value of starch is found in 40 minutes treatment which is 72.95%, the highest average hedonic organoleptic test value is found in 60 minutes treatment which is 4,20 with a score 4 (likes),  the highest average hedonic organoleptic test score was found at 0 minutes treatment which was 3.71 with a score 4 (likes).

Abstrak. Mutu kopi arabika gayo sangat tergantung pada proses penanganan pasca panen, terutama proses penyangraian. Tujuan penelitian ini untuk mengetahui pengaruh suhu dan lama penyangraian terhadap mutu kopi arabika gayo. Penelitian ini menggunakan biji kopi arabika gayo dari Desa Buntul Kemumu. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan variasi suhu 160, 170 dan 180˚C dengan lama penyangraian  15, 20, dan 25 menit. Parameter penelitian meliputi rendemen, kadar air, keasaman (pH), kafein dan uji organoleptik terhadap warna, aroma dan rasa oleh 25 orang panelis. Data dianalisis menggunakan analisis sidik ragam (ANOVA) dengan uji lanjut Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian ini menunjukan bahwa rendemen, kadar air, dan keasaman kopi arabika gayo dipengaruh secara nyata oleh suhu dan lama penyangraian. Rendemen tertinggi diperoleh pada suhu 160℃ dan lama penyangraian 15 menit yaitu 85,2%. Kadar air pada kopi arabika gayo memenuhi standar SNI yaitu maksimal 7%, kecuali pada perlakuan suhu 160˚C dan lama penyangraian 15 menit yaitu 7,14% . Keasaman (pH) tertinggi diperoleh pada suhu 160˚C lama penyangraian 15 menit yaitu 4,95. Kadar kafein kopi arabika gayo meningkat semakin tinggi suhu dan lama penyangraian. Berdasarkan uji organoleptik menunjukan bahwa kopi arabika gayo yang paling disukai panelis diperoleh suhu penyangraian 170 dan 180˚C dengan lama penyangraian 25 menit.Study of Arabica Gayo Coffee Quality under Temperature and Roasting Duration TreatmentsAbstract. The quality of gayo arabica coffee was affected by postharvest handling especially roasting process. This study aimed to find out the impact of temperature and roasting duration against the quality of gayo arabica coffee.The study was conducted by using Factorial Completely Randomized Design i.e. roasting temperature at 3 levels namely 160, 170 and 180℃, and roasting durations at 3 levels namely 15, 20, and 25 minutes. The coffee beans from Buntul Kemumu Village was evaluated in this study. Parameters analysed were yield, moisture content, acidity, caffeine content and 25 respondent perceptions on colour, aroma and taste. Data were analysed by using analysis of variance (ANOVA) and honestly significance difference at probability 5%. The results showed that the yield, moisture content, and acidity of gayo arabica coffee bean were influenced by temperature and roasting duration. The highest yield was obtained at treatment 160℃ temperature for 15 minutes roasting, i.e 85.2%. The mositure content of gayo arabica coffee beans followed the SNI qualification, i.e. 7%, unless at treatment 160℃ temperature for 15 minutes roasting, i.e. 7.14%. The highest acidity (pH) was obtained from treatment 160℃ temperature for 15 minutes roasting, i.e. 4.95. The caffeine content increased as temperature and roasting duration increased. Respondent perceptions showed that the best quality of gayo arabica coffee was obtained from treatment 170 and 180℃ temperature for 25 minutes roasting.

Abstrak. Penelitian ini bertujuan untuk mengkaji karakteristik pengeringan serai dapur menggunakan alat pengering Tray Dryer berdasarkan perlakuan blanching yang berbeda untuk produksi bubuk serai. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) non faktorial dengan perlakuan tanpa blanching, blanching dengan uap, dan blanching dengan air panas. Parameter penelitian meliputi suhu lingkungan, kelembaban udara, kecepatan aliran udara, pengukuran bobot selama pengeringan, pengukuran kadar air selama pengeringan, laju pengeringan, kadar air bubuk serai dapur, rendemen, dan uji organoleptik (aroma dan warna). Uji hedonik dilakukan terhadap 30 orang panelis. Hasil dari penelitian ini menunjukkan bahwa perlakuan tanpa blanching, blanching uap, dan blanching air tidak berpengaruh nyata terhadap kadar air, namun berpengaruh nyata pada rendemen, organoleptik aroma, dan organoleptik warna. Berdasarkan hasil uji lanjut Beda Nyata terkecil (BNt), dapat disimpulkan bahwa perlakuan terbaik didapatkan pada perlakuan blanching dengan uap. Pada perlakuan tersebut diperoleh rendemen sebesar 18,17%, kadar air 8,85%, skor kesukaan terhadap warna 4 (suka) dan skor kesukaan terhadap bau 4 (suka).Characteristic of Lemongrass Drying (Cymbopogon citratus L) Using Try Dryer Based on Different Blanching ProcessAbstract. This study was to examine the characteristics of drying the lemongrass using a Tray Dryer based on different blanching treatments for the production of lemongrass powder. This study used a non-factorial Random Design (RAL) with treatment without blanching, steam blanching, and hot water blanching. Parameter research include ambient temperature, air humidity, air velocity, weight measurement during drying, moisture measurement during drying, drying rate, water content of lemongrass powder, rendement, and organoleptic test (aroma and color). The hedonic test was conducted on 30 panelists. The results of this study showed that blanching treatment, blanching of steam, and water blanching had no significant effect on water content, but had significant effect on yield, organoleptic flavor, and organoleptic color. Based on the results of a further test Significant Difference (LSD), it can be concluded that the best treatment is obtained in the treatment steam blanching. In the treatment obtained rendemen of 18.17%, water content 8.85%, favorite score on color 4 (like) and favorite score of smell 4 (like).

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