scholarly journals Quality Characteristics of Nutri-fried Noodles Made from Sweet Potato Tubers and Tops Ipomea batatas

2016 ◽  
Vol 24 (1) ◽  
Author(s):  
Geraldine F. De Jesus ◽  
Shirley G. Dicen ◽  
Maria Crisanta M. Jarque

Noodles made from sweet potato can be a healthier alternative to commercially produced ones since it is rich in vitamins and minerals. The product has no artificial preservatives, and the sweetness of its taste comes naturally from the sugar content of the Camote tubers. The project is the second phase of a study on the development of nutri-noodles made from the tubers and tops of sweet potato.  The study determined the physicochemical and microbial analysis and shelf-life of the product and verify its acceptability through quantitative testing. The sample was submitted to Department of Science and Technology Region V for analysis and the results were: 6.53% moisture, 0.13% free fatty acids and <150 CFU/g of yeast and mold count. Moreover, nutrition facts were also computed, Calories is 231, Total Fat= 4%, Cholesterol= 0%, Sodium= 4%, Total Carbohydrate= 6%, Dietary Fiber= 28%, Magnesium =13% and Vitamin B6= 12%. The shelf-life of the product is six months stored at room temperature. The Nutri-fried noodles were served with vegetable toppings, and as rated by the panelists the result was liked very much. After analyzing the quality characteristics of the product, it is recommended that the sample is ready for production and marketing.

2018 ◽  
Vol 13 (3) ◽  
pp. 136
Author(s):  
Maftuh Kafiya ◽  
Nfn. Sutrisno ◽  
Rizal Syarief

<p>Penyimpanan ubi jalar di daerah infrastruktur terbatas yang mengutamakan kesederhanaan teknologi dan kemurahan biaya diupayakan dengan menggunakan bahan-bahan lokal yang tersedia seperti pasir, jerami dan serbuk gergaji. Selama penyimpanan, kandungan nutrisi di dalam ubi jalar berpotensi mengalami perubahan, khususnya kandungan air dan pati sehingga memengaruhi mutu ubi jalar. Umur simpan ubi jalar ditandai dengan pembusukan, berupa penurunan mutu dan tanda-tanda penyakit yang disebabkan oleh mikroorganisme. Penelitian ini bertujuan melakukan identifikasi dan analisis teknologi terbaik dengan memperhatikan perubahan kadar air dan pati serta penyakit yang menjadi penentu perubahan mutu ubi jalar. Rancangan percobaan yang digunakan adalah rancangan acak lengkap dengan 4 taraf perlakuan penyimpanan yaitu di dalam tanah dengan alas tumpukan pasir-jerami (P1), di dalam tanah dengan alas tumpukan plastik-jerami (P2), di dalam kotak kayu dengan taburan serbuk gergaji (P3) dan di ruang gudang dengan alas terpal (P4). Hasil penelitian menunjukkan bahwa metode penyimpanan memberikan pengaruh terhadap suhu dan RH ruang penyimpanan dengan nilai masing-masing adalah 28,72 oC dan 78.55% (P1), 28,85 oC dan 78,51% (P2), 29,54 oC dan 73,15% (P3), serta 29,61 oC dan 68.07% (P4). Kadar air dan pati mengalami penurunan selama penyimpanan pada semua perlakuan hingga akhir penyimpanan dengan kadar terendah pada perlakuan P4 yang masing-masing sebesar 58,96 dan 11,35%. Sedangkan penyakit yang dapat diidentifikasi pada penelitian ini adalah busuk Fusarium pada penyimpanan P4 dan penyakit java black rot pada penyimpanan P2. Berdasarkan metode pendugaan umur simpan, maka penyimpanan di dalam tanah dengan alas tumpukan pasir-jerami (P1) merupakan metode terbaik dengan umur simpan diduga mencapai 35 hari.</p><p align="center"><strong>English Version Abstract</strong></p><p align="center"><strong><strong>Extra Quality Sweet Potato (<em>Ipomea batatas L</em>) Fresh on the System Rural Scale Storage</strong></strong></p><p>Sweet potato storage in areas with limited infrastructure which focuses on a simple and low-cost technology is conducted by using local materials, such as sand, straw, and sawdust. During the storage period, sweetpotato’s nutrition content will potentially deteriorate, particularly in moisture and starch content. This will eventually affect the quality of sweetpotato. The shelf life of sweetpotato is marked by the spoilage in the form of quality deterioration and some noticeable signs of diseases, most of which are induced by microorganism. This study aimed to study the best technology to evaluate quality change, diseases and shelf life of sweetpotato. The experimental design used was completely randomized design of 4 factors by using various storage ways, i.e. underground storage with sand-straw (P1), underground storage with plastic-straw (P2), inside a wooden box with sprinkling of sawdust (P3), and inside a warehouse with a tarpoulin mat (P4). The results showed that the storage treatments influenced the temperature and RH in a storage room with the values as follows: 8.72 ° C and 78.55% (P1), 28.85 C and 78.51% (P2), 29.54 and 73.15 ° C % (P3), and 29.61 ° C and 68.07% (P4). Moisture and starch contents in sweet potato significantly decreased until the end of storage in which the lowest levels were found in P4 treatment, 58.96 % water content and 11.35 % starch. Postharvest diseases found in sweet potato during research were Fusarium rot (P4) and java black rot (P2). In conclusion, underground storage with sand-straw (P1) was selected as the best method to minimize rate of decreasing moisture and starch contents in sweetpotato with the longest storage period estimated of 35 days.</p>


2019 ◽  
Vol 31 (2) ◽  
pp. 319-329
Author(s):  
Nivien A. Nafady ◽  
Saad A.M. Alamri ◽  
Elhagag Ahmed Hassan ◽  
Mohamed Hashem ◽  
Yasser S. Mostafa ◽  
...  

AbstractA reduction in crop spoilage and an increase in shelf-life is the goal of effective disease control methods. This study aimed to assess ZnO-nanoparticles (ZnO-NPs) as a safe, new protectant against Rhizopus soft rot of sweet potato. ZnO-NPs had a fungicidal effect against Rhizopus stolonifer when used at concentrations above 50 ppm. The results showed that tubers treated with ZnO-NPs exhibited fewer fungal populations (1.2 CFU per segment) than those that did not receive the treatment. Tubers infected with Rhizopus stolonifer and treated with ZnO-NPs showed no visible decay for up to 15 days, indicating that ZnO-NPs act as a coating layer on tuber surface. The greatest weight loss after 15 days of storage was reported in infected tubers (8.98%), followed by infected tubers treated with ZnO (6.54%) and infected tubers treated with ZnO-NPs (3.79%). The activity of cell-wall degrading enzymes, α-amylase and cellulase, were significantly increased in both infected tubers and those treated with ZnO, compared to the tubers treated with ZnO-NPs. These results confirm that coating with ZnO-NPs is an effective method of protecting sweet potato tubers from infection, maintaining their quality and increasing their shelf-life for up to 2 months in storage.


2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Musdar Musdar ◽  
Lukmanul Hakim ◽  
Juliani Juliani ◽  
Jailani Jailani

White sweet potato starch (Ipomea batatas L.) and avocado seed starch (Parsea americana Mill) derived from local plants have the potential to be developed as agricultural products. Starch is a hydrocolloid compound as a potential local resource to be utilized. Glycerol function as an anti-freezing which is hygroscopic. This study aims to determine the ratio of white sweet potato starch with avocado seed starch and the concentration of glycerol for making edible film. This study was an experiment using a completely randimized factorial design with 2 (two) main factor consisting of a comparison of white sweet potato starch and avocado seed with 3 levels: P1 = 35%:65%., P2=50%:50%., P3=65%:35% and glycerol concentration with 3 levels: G1=1%., G2=2%., G3=3%. The best result reasearch were content of 23.03% (tratment P1G1), solubility of 55.57% (treatment P3G2)., swelling test of 9.83% (treatment P2g3)., elongation of 8.18% (treatment P3G2)


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