scholarly journals Effects of Microbial Starter Composition on Nutritional Contents and Pasting Properties of Fermented Cassava Flour

2019 ◽  
Vol 19 (1) ◽  
pp. 12
Author(s):  
M.T.A.P. Kresnowati ◽  
L. Turyanto ◽  
A. Zaenuddin ◽  
K. Trihatmoko

Fermentation of cassava chips prior to drying and milling processes improves cassava flour quality: i.e. lower cyanogenic content, remove specific odour and colour. Composition of microbial starter applied to the fermentation may affect the microbial population during the fermentation and thus directs the process and the produced flour properties. This study mapped the effects of microbial starter composition on the microbial profiles during the fermentation and the corresponding nutritional contents as well as pasting properties of the produced fermented cassava flour (fercaf). Combinations of Lactobacillus plantarum, Bacillus subtilis and Aspergillus oryzae, that were selected based on their enzymatic activities, were evaluated. The addition of microbial starter was shown to affect the dynamics in microbial population during the fermentation. The addition of lactic acid bacteria accelerated the release of cyanogenic glycoside and starch conversion to simpler sugars, the addition of B. subtilis improved the disruption of cassava fibres, whereas the addition of A.oryzae was shown to increase the protein content of fercaf. The different microbial starter added to fermentation system also resulted in different pasting properties of fercaf. Microbial starter composition can be designed as such for the production of a particular flour property.

2020 ◽  
Vol 7 ◽  
Author(s):  
Yayuan Zhang ◽  
Lei Nie ◽  
Jian Sun ◽  
Yan Hong ◽  
Huabing Yan ◽  
...  

The impacts of environmental conditions on pasting and physicochemical properties were investigated using flour samples of the same cassava cultivar grown in seven different locations. Significant location differences in essential component (except for fiber) content of cassava flour were observed. Cassava flour showed obviously separated traits in the principal component analysis (PCA) of near-infrared spectra (NIR) according to geographical origins. The environmental effects were significant in the pasting properties of cassava flours. Sufficient precipitation and suitable low temperature promoted accumulation of starch in cassava, resulting in the high peak viscosity values of cassava flour. Pasting temperatures of cassava flour had a significant direct correlation with growth temperature and were negatively correlated with altitude. Precipitation from August to October showed a stronger direct correlation with trough and final viscosity. The results of this study indicated the possibility of predicting and controlling cassava flour quality and pasting properties according to the environmental conditions.


Sarwahita ◽  
2015 ◽  
Vol 12 (1) ◽  
pp. 54-62
Author(s):  
I. Gusti Ayu Ngurah S

ABSTRAK  Pengabdian ini mempunyai tujuan untuk  memberikan pengetahuan dan pengajaran mengenai pembuatan tepung mocaf dan penggunaannya sebagai bahan dasar pengganti tepung terigu dalam pembuatan mie sehingga dapat membantu ibu-ibu di Desa Jaya Sakti dalam memenuhi kebutuhan mereka membuat mie dari tepung mocaf dengan harapan hasil produk dapat dijual sehingga dapat menambah income bagi keluarga mereka. Khalayak sasaran adalah Ibu-ibu PKK dan warga sekitar Desa Jaya Sakti. Pelatihan ini di laksanakan dalam satu kali pertemuan, Pertemuan dilakukan di rumah Kepala Desa Jaya Sakti Muaragembong Bekasi Pertemuan diawali dengan pembukaan kemudian memberikan materi dan praktek pembuatan tepung mocaf, dan pembuatan mie dari tepung mocaf. Untuk bahan dasar mie tepung mocaf digunakan yang telah siap pakai. Tepung  Mocaf  (Modified  Cassava  Flour),  adalah produk tepung  dari ubi kayu/singkong yang diperoses menggunakan prinsip memodifikasi sel ubi kayu dengan cara fermentasi. Mikroba yang tumbuh menyebabkan perubahan karakteristik pada tepung yang dihasilkan, yaitu naiknya viskositas, kemampuan gelasi, daya rehidrasi, dan kemudahan melarutkan. Mikroba   juga   menghasilkan   asam-asam   organic,   terutama   asam   laktat   yang   akan terimbibisi dalam tepung, dan ketika tepung itu diolah akan menghasilkan aroma dan citra rasa khas, yang dapat menutupi aroma dan citra rasa ubi kayu yang cenderung tidak menyenangkan konsumen. Tekstur dan warna tepung mocaf ini lebih halus dan lebih putih dari tepung terigu. Untuk   pengembangan   lebih   lanjut,   maka   tepung   mocaf   diaplikasikan   untuk membuat mie, selain nilai jualnya lebih baik lagi karena menghasilkan produk yang lain dan langsung bisa di konsumsi. Dari hasil kegiatan pengabdian ini terlihat antusias dari para peserta, karena mereka senang mendapatkan pengetahuan baru yang dapat mereka praktekkan di rumah masing- masing.   ABSTRACTThis dedication aims to provide knowledge and teaching about making mocaf flour and its use as a substitute of wheat flour in making noodles so it can help mothers in Jaya Sakti Village in fulfilling their need to make noodles from mocaf flour in the hope that the product can be sold so that can increase income for their families.Target audiences are PKK mothers and residents around Jaya Sakti Village. Trainingthis was held in one meeting, the meeting was held at the Village Head's houseJaya Sakti Muaragembong BekasiThe meeting begins with the opening then gives the material and practice of making mocaf flour, and making noodles from mocaf flour. For basic materials used mocaf flour noodles that have been ready to use.Mocaf Flour (Modified Cassava Flour), is a flour product of cassava / cassava that is processed using the principle of modifying cassava cells by fermentation. Increased microbes cause characteristic changes in the resulting flour, namely increased viscosity, gelability, rehydration, and ease of dissolution. Microbes also produce organic acids, especially lactic acid which will be added to the flour, and when the flour is processed it will produce a distinctive flavor and taste image, which can mask the flavor and taste of cassava that tend to discomfort the consumer. The texture and color of the mocaf flour is finer and whiter than wheat flour.For further development, then the mocaf flour is applied tomaking noodles, in addition to the selling price is better because it produces other products and can directly in consumption.From the results of this devotional activity look enthusiastic from the participants, because they love to get new knowledge that they can practice in their homes.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yuvraj K. Bhosale ◽  
Thivya Perumal ◽  
Shery M. Varghese ◽  
Hema Vincent ◽  
Sinija Vadakkepulppara Ramachandran

Abstract Shallot harvesting and processing produce various waste streams, and the current study aims to investigate the effects of shallot bio-waste powder (SWP) substitution on different flour properties. Increased SWP to 50% substitution of stalk and petiole showed a rise in swelling capacity (43.33%) and water absorption (342.22%), and oil absorption (320.73%), respectively. Foaming capacity improved from 48.00% in control to 60.26% in 30% flower substitution and further decreases to 51.28% at 50%. Pasting properties reduced at higher SWP substitution and the highest drop in peak viscosity was observed at Stalk-50 (457.33 cP). Subsequently, developed functional cookies showed enhanced fiber, ash, total phenol, and total flavonoids with 3, 2, 7, and 5 fold, respectively. Cookies developed with higher substitution were of darker color and higher hardness and fracturability. Sensory evaluation with fuzzy analysis revealed better acceptance for stalk and petiole (10%) and peel (5%) of final cookies with elevated nutritional value.


2019 ◽  
Vol 7 (10) ◽  
pp. 407 ◽  
Author(s):  
Hadar Kimelman ◽  
Moshe Shemesh

Live probiotic bacteria obtained with food are thought to have beneficial effects on a mammalian host, including their ability to reduce intestinal colonization by pathogens. To ensure the beneficial effects, the probiotic cells must survive processing and storage of food, its passage through the upper gastrointestinal tract (GIT), and subsequent chemical ingestion processes until they reach their target organ. However, there is considerable loss of viability of the probiotic bacteria during the drying process, in the acidic conditions of the stomach, and in the high bile concentration in the small intestine. Bacillus subtilis, a spore-forming probiotic bacterium, can effectively maintain a favorable balance of microflora in the GIT. B. subtilis produces a protective extracellular matrix (ECM), which is shared with other probiotic bacteria; thus, it was suggested that this ECM could potentially protect an entire community of probiotic cells against unfavorable environmental conditions. Consequently, a biofilm-based bio-coating system was developed that would enable a mutual growth of B. subtilis with different lactic acid bacteria (LAB) through increasing the ECM production. Results of the study demonstrate a significant increase in the survivability of the bio-coated LAB cells during the desiccation process and passage through the acidic environment. Thus, it provides evidence about the ability of B. subtilis in rescuing the desiccation-sensitive LAB, for instance, Lactobacillus rhamnosus, from complete eradication. Furthermore, this study demonstrates the antagonistic potential of the mutual probiotic system against pathogenic bacteria such as Staphylococcus aureus. The data show that the cells of B. subtilis possess robust anti-biofilm activity against S. aureus through activating the antimicrobial lipopeptide production pathway.


Author(s):  
Luz Karime Medina-cÓrdoba ◽  
Ligia Lucia Valencia-mosquera ◽  
Gretty Paola Tarazona-diaz ◽  
Janeth Del Carmen Arias-palacios

Objective: To evaluate the efficacy of a disinfectant based on hydrogen peroxide.Methods: The method used to assess the efficacy of the disinfectant was the agar plate technique. With this procedure, it was possible to determine the percentage of inhibition of the high-level disinfectant of STERIS against four microorganisms, i.e., Pseudomonas aeruginosa ATCC 9027, Staphylococcus aureus (Beta-Hemolytic 227), Salmonella choleraesuis (Kuznedorf CMDM 074), and Bacillus subtilis (ATCC 6633). The effectiveness of five disinfectant concentrations (0.02%, 0.04%, 0.08%, 1%, and 2%) was determined and evaluated in three different times 5, 10, and 15 min, for vegetative strains and 3, 6, and 9 h for the sporulated strain.Results: According to the experimental test, the reduction of the microbial population was, on average, 100% for the disinfectant concentrations of 0.08%, 1%, and 2%.Conclusion: The results obtained demonstrated that the high-level disinfectant of STERIS based on hydrogen peroxide is 100% effective when the concentration recommended by the commercial house (2%) is used in the shortest time exposure to disinfectant. The minimum level of effectiveness was 0.08%; however, if lower concentrations are used, destruction of the microorganisms is not guaranteed.


2016 ◽  
Vol 13 (2) ◽  
pp. 1-8 ◽  
Author(s):  
T Amapu ◽  
J Ameh ◽  
S Ado ◽  
I Abdullahi ◽  
H Dapiya

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