Publisher: Bogor Agricultural University   (Total: 1 journals)   [Sort by number of followers]

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Marine Fisheries : J. of Marine Fisheries Technology and Management     Open Access   (Followers: 3)
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Jurnal Keteknikan Pertanian
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2407-0475 - ISSN (Online) 2338-8439
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  • Rapid Assessment of Fresh Beef Spoilage Using Portable Near-Infrared
           Spectroscopy

    • Authors: Akeme Cyril Njume, Y. Aris Purwanto, Dewi Apri Astuti, Slamet Widodo
      Pages: 79 - 86
      Abstract: The objective of this study was to develop a prediction model to assess fresh beef spoilage directly with the use of a portable near-infrared spectroscopy (NIRS), without conducting a chemical method. Three fresh beef samples were bought from a slaughterhouse and traditional market on separate days. Spectra were acquired using a portable Scio spectrometer with wavelength 740-1070 nm, and two-third was used for calibration sets and one-third for validation sets. Partial least square regression and cross-validation were used to develop a model and equation for predicting beef spoilage. The changes observed were changed in color, water loss, and muscle hardness. The best predictive model was obtained from the original spectra (no pre-process) results as follows (R2C = 0.9, Rp = 0.86, SEC = 0.61, SEP = 0.69 and RPD = 3.53). Multiple Scattered Correlation (MSC) pre-processing method gave a good and acceptable model with results as follows; Rc = 0.89, SEC = 0.66, SEP = 0.83 and RPD = 2.91. NIRS showed variability of the samples and rate of spoilage, hence, can be used to assess quality and safety. Further studies are needed to develop a robust model to predict fresh beef spoilage using a portable NIRS Scio.
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.79-86
      Issue No: Vol. 9, No. 3 (2021)
       
  • Android based Expert System for Weeds Identification in Soybean
           Cultivation

    • Authors: Mohamad Solahudin, Giska Priaji
      Pages: 87 - 94
      Abstract: The obstacle  that often occur on soybean cultivation activity is a weed problem that could potentially reduce productivity. It’s need an expert system that can represent knowledge regarding the identification of weed species, therefore farmers can decide appropriate controls. This study aims create offline android based expert system is to identify the type of weeds in soybean cultivation based morphological information and determine appropriate advice weed control. Forward chaining used as an inference engine development methods to achieve the conclusion of expert systems. Expert systems of weed species identification contain information of the weeds type and grouping, herbicides information, herbicide dose, and weed control galleries. Application size 6.97 Megabytes (Mb) and run without internet connection. Testing applications can run properly, with accuration of weed species identification reaches 87.5%
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.87-94
      Issue No: Vol. 9, No. 3 (2021)
       
  • Estimated Shelf Life of Torbangun Leaf Powder in Various Packaging
           Materials

    • Authors: Lydia Ariani, Rokhani Hasbullah, Usman Ahmad
      Pages: 95 - 102
      Abstract: Torbangun leaf powder can improve the quality and quantity of breast milk in pregnant and lactating women because it contains bioactive compounds from phenol group, especially thymol and carvacrol. The purpose of this study was to examine parameters change of torbangun leaf powder (moisture content, free fatty acids, antioxidant activity and total phenol), and estimate shelf life of torbangun leaf powder in various packaging. Accelerated Shelf-Life Testing method based on Arrhenius approach was used to estimate shelf life of torbangun leaf powder. 100 g of torbangun leaf powder were stored in three packaging materials, namely HDPE, PP and aluminum foil at 30oC, 35oC, 40oC, 45oC and 50oC. The results showed that temperatures affect moisture content, free fatty acids, antioxidant activity and total phenol of torbangun leaf powder. Arrhenius model describes total phenol change, where ln k= 28.29 × -9746.8/T, ln k= 30,866 × -10565/T and ln k= 29,162 × -10019/T for HDPE, PP and aluminum packaging. foil. Thus, shelf life of torbangun leaf powder at 15oC and 28oC for HDPE is 691 days and 160 days, followed by PP is 899 days and 184 days, and aluminium foil is 807 days and 173 days.
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.95-102
      Issue No: Vol. 9, No. 3 (2021)
       
  • Prediksi Indeks Panen Jambu “Kristal” secara Non Destruktif
           Menggunakan Portable Near Infrared Spectrometer

    • Authors: Ayu Putri Ana, Y. Aris Purwanto, Slamet Widodo
      Pages: 103 - 110
      Abstract: “Crystal” guava (Psidium guajava L.) is a climacteric fruit that is generally harvested by farmers based on cultivation experience. In this study, portable 740-1070 nm of near-infrared spectrometer was employed to rapidly predict harvest indices of “crystal” guava, by means of non-contact and non-destructive approach. Samples of guava fruit were collected at days after anthesis (DAS) of 91, 94, 97, and 100. The total number of each sample were 30 fruits. The firmness, soluble solid content, acidity and sugar acid ration were evaluated as quality parameters. Partial least square (PLS) method was utilized for data processing. It was found that Standard Normal Variate (SNV) resulted the best pre-processing for all quality parameters. Performances of best models were demonstrated by coefficient of corraltion (R), standard error of calibration (SEC) and standard error of prediction (SEP), which were respectively 0.88, 6.21, 5.92 for firmness prediction, 0.74, 0.84, 0.79 for soluble solid content prediction, 0.59, 0.19, 0.26 for acidity prediction, and 0.71, 1.21, 1.58 for sugar acid ratio prediction model.
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.103-110
      Issue No: Vol. 9, No. 3 (2021)
       
  • Self Life Estimation of Chili Paste with Additional of Natrium Benzoat
           Using Arrhenius Acceleration Method

    • Authors: Sri Lestari, Silvia Yuniarti, Hijriah Mutmainah, Maureen C. Hadiatry, Ismatul Hidayah
      Pages: 111 - 118
      Abstract: Chili paste is a processed chili product that has a promising prospect. Marketing problems are closely related to product shelf life. A method is needed to estimate the shelf life of the chili paste that will be marketed. The purpose of this study was to determine the shelf life of chili paste using the Accelerated Shelf-Life Testing (ASLT) method with the Arrhenius approach. The study used 5 treatments of natrium benzoate concentration, namely 0 g / kg of material, 0.25 g / kg of material, 0.5 g / kg of material, 0.75 g / kg of material and 1 g / kg of material. Storage was carried out at temperatures of 20 oC, 25 oC and 40 oC. Observations were made on days 0, 4, 8, 12 and 15. The critical parameter used was the panelist's preference value. 10 panelists were used to rate each sample of chili paste with a score of 1 to 6 (1 = disliked very much, 2 = disliked it, 3 = slightly disliked it, 4 = liked it a little, 5 = liked it, 6 = liked it very much). The results showed that the estimated shelf life of chili paste in the chili paste sample which was added with natrium benzoate was 0 g / kg of material, 0.25 g / kg of material, 0.5 g / kg of material, 0.75 g / kg of material and 1 g / kg of material at 25 oC, namely 3.37, 12.63, 12.93, 14.75 and 63.30 days respectively. The use of natrium benzoate as much as 1 g / kg of material is the maximum dose permitted in accordance with the Regulation of the Minister of Health of the Republic of Indonesia No. 722 / MENKES / Per / IX / 1988.  
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.111-118
      Issue No: Vol. 9, No. 3 (2021)
       
  • Characteristics and Financial Feasibility of Gedong Gincu Mango Farming in
           Indramayu Regency

    • Authors: khoirul umam, Rokhani Hasbullah, Mohamad Solahudin
      Pages: 119 - 126
      Abstract: Gedong gincu mango is one of the mango varieties that is excellent for local and foreign people because it has its own uniqueness when compared to other types of mango. The aims of this study were to analyze: 1) the characteristics of gedong gincu mango farming in Indramayu district, 2) the financial feasibility of gedong gincu mango farming, and 3) the sensitivity of gedong gincu mango farming to changes in production costs, selling prices, production quantities and land rent. Data collection was carried out by means of observation and interviews with 16 respondent farmers in October-November 2019. The results showed that the gedong gincu mango has great potential to continue to be developed. The initial investment cost required is Rp. 52,226,667, -/ha and for subsequent maintenance an average of Rp. 8,284,000 -/ha/month. At an interest rate of 8.75%, it shows that mango gedong gincu farming is feasible to be developed with an NPV value of Rp. 39,289.514, IRR 91.00% and B/C 1.43. Based on the sensitivity analysis, the most determining factors in income (profit/loss) for mango gedong gincu farmers in Indramayu district are a decrease in the selling price and the amount of production, and if there is an increase in production costs, selling prices and the amount of production at once.
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.119-126
      Issue No: Vol. 9, No. 3 (2021)
       
  • Study of Kinetic Model for Ultrasonic-Assisted Extraction of Pepper (Piper
           nigrum L.)

    • Authors: Anggie Yulia Sari, I Wayan Budiastra, Slamet Widodo
      Pages: 127 - 134
      Abstract: Ultrasonic Assisted Extraction (UAE) is used to extract oleoresin from pepper that offer a competitive method compared to maceration. This research was aimed to study and to validate a second order of kinetics model of UAE white pepper extraction that can describe the relationship between oleoresin yield, UAE amplitude, and extraction time. Pepper is milled to particle size of 100 mesh. Then the 200 g of powder of pepper is poured to ethanol of 800 ml (1:4) to subjected to UAE extraction. A maceration process is also carried out as control. Amplitude and extraction times used in the UAE extraction are 45, 60, 75, and 90%; and 45, 60, 75, and 90 minutes. The value of white pepper oleoresin concentration experiment (Ct) with model calculations is closely related to the extraction capacity at saturation (Cs) and the resulting extraction rate constant (k). The value of Cs between 29,24–34,48 g/l and the value of k ​​between  l/g.minute. The results from the two Ct obtained produce a correlation coefficient value of 0.85 and the error value between 0,18–14,09 %. The second-order kinetic model developed can be used to predict the yield of UAE-assisted white pepper oleoresin with UAE amplitude limit conditions of 45–90 % and extraction time of 45–90 minutes.
      PubDate: 2021-12-23
      DOI: 10.19028/jtep.09.3.127-134
      Issue No: Vol. 9, No. 3 (2021)
       
  • Application of Zeolite-KMnO4 and Silica Gel to Extend Green Life of Manggo
           Arumanis (Mangifera indica L)

    • Authors: Anita Khairunnisa, Emmy Darmawati, Siti Mariana Widayanti
      Pages: 135 - 142
      Abstract: Mangoes are harvested when ripe have an "eating quality" that consumers are them in, but quickly reach the senescence phase, making it less profitable for businesses. As a climacteric fruit, the ripening process of mango can be slowed down by using an ethylene adsorber. This study aims to determine the combination of zeolite-KMnO4 and silica gel as ethylene adsorber (EAB) to maintain the green life of ripe The material used is ethylene adsorber (EAB) which is applied to mango arumanis which is packaged with a weight package of 1000±50 g. After the shelf life is reached, the EAB is removed from the packaging and the mangoes are left at room temperature for natural ripening and continued until conditions are not acceptable to consumers. The results showed that the EAB application was able to maintain the green life of mangoes by the scenario of the shelf life both at cold and room temperature storage. Natural ripening of mango was achieved 5 days and 2 days after EAB was removed from the packaging, for cold and room temperature storage, respectively. The length of time until the panellists did not receive it was 20 days for cold storage and 12 days for the room, while the control for cold storage was 6 and 3 days at room temperature
      PubDate: 2021-12-31
      DOI: 10.19028/jtep.09.3.135-142
      Issue No: Vol. 9, No. 3 (2021)
       
 
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