Bibliografie tematiche / Obushera

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Letteratura scientifica selezionata sul tema "Obushera"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Obushera"

1

Mukisa, Ivan Muzira, Stellah Byakika, Rehema Meeme, Alex Paul Wacoo, Wilbert Sybesma e Remco Kort. "Adopting traditional fermented foods as carriers for probiotics". Nutrition & Food Science 50, n. 5 (17 novembre 2019): 841–52. http://dx.doi.org/10.1108/nfs-06-2019-0188.

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Abstract (sommario):
Purpose Traditional fermented products can be adopted as probiotic carriers. This study was aimed at evaluating the potential of using Obushera, a traditional sorghum beverage from Uganda, as a carrier for Lactobacillus rhamnosus yoba. Design/methodology/approach Probiotic Obushera was produced by fermenting sorghum malt with Lb. rhamnosus yoba 2012 and Streptococcus thermophilus C106 at 30 °C and at room temperature (21°C-25 °C) for 24 h. Acidity, pH, total soluble solids and microbial counts were monitored. Consumer acceptability and purchase index of probiotic Obushera were compared to four commercial non-probiotic brands. Shelf stability of probiotic Obushera was determined by monitoring changes in pH, acidity, soluble solids, microbial counts and consumer acceptability during refrigerated storage. Findings Lactobacillus rhamnosus yoba 2012 multiplied and lowered the pH of Obushera from 5.3 to < 4.0 (p < 0.0001) whilst increasing acidity from 0.21 to 0.46 per cent (p < 0.0001) in 9 h at 30 °C. Consumer acceptability varied with Obushera brand (p < 0.0001). The overall acceptability score of probiotic Obushera (score of 6.4 = like slightly) was similar to that of the two most acceptable commercial brands (scores of 5.8 and 6.6). Acidity, pH and Lb. rhamnosus counts of probiotic Obushera varied within 0.6 per cent –1.05 per cent (p < 0.0001), 3.3–3.4 (p < 0.0001), and 8.2-9.2 log cfu/ml (p < 0.0001), respectively during two months of storage. The overall acceptability of probiotic Obushera (scores of 6.9-7.8) did not change significantly during storage (p = 0.185). Practical Implications Traditional fermented foods such as Obushera can be adopted as carriers of probiotic microorganisms. Originality/value Use of commercial probiotic strains in traditional fermented foods is a novel approach that can be adopted to improve safety of traditional fermentations and health of consumers.
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2

Mukisa, IM, CMBK Muyanja, YB Byaruhanga, T. Langsrud e JA Narvhus. "Changes in physico-chemical properties and flavour compounds during fermentation of different obushera (sorghum and millet) beverages". African Journal of Food, Agriculture, Nutrition and Development 12, n. 54 (19 ottobre 2012): 6665–85. http://dx.doi.org/10.18697/ajfand.54.11765.

Testo completo
Abstract (sommario):
Four types of Obushera, a fermented millet or sorghum beverage: Ekitiribita, Obuteire, Obutoko and Enturire were analyzed for their physico-chemical properties, sugars, organic acids and volatile compounds during fermentation. Standard chemical methods were used to determine the physico-chemical properties of Obushera. The organic acids, carbohydrates, glucose, fructose and maltose were analyzed by highperformance liquid chromatography. The pH of all Obushera varied between 4.00±0.10 and 4.42±0.11 after 4 days of fermentation. The pH of Obuteire, Obutoko and Enturire dropped below 4.5 within one day of fermentation. Acidity ranged between 0.13% (Ekitiribita) to 1.33% (Enturire) after 4 days of fermentation. Dry matter decreased and varied between 5.4 and 22% after 4 days of fermentation. Fermentation resulted into a 20–40% reduction of dry matter in Obutoko, Obuteire and Enturire. Enturire had the highest dry matter content and decreased from 22% to 13%. Fermentation resulted in an apparent increase in protein concentration (5.7– 12.3%). Flavour compounds identified included sugars, organic acids, aldehydes, ketones, alcohols and esters. Enturire contained the highest (p < 0.05) concentrations of most flavor compounds. Sugars (maltose, glucose and fructose) were reduced during fermentation. The predominant organic acids detected were lactate, acetate and succinate and increased with fermentation time. Alcohols identified in Obushera were ethanol, 3-methyl-1-butanol, 2-methyl-1-propanol and 2-methyl-1-butanol and increased during fermentation. Ethanol was the predominating alcohol reaching a maximum of 0.8–1.0% (Obuteire and Obutoko) and 4.5% in Enturire during fermentation. The aldehydes detected in Obushera were acetaldehyde, 2-methyl-1- propanal, 2-methyl-1-butanal and 3-methyl-1-butanal and varied from 0.1 mg kg-1 to 6.8 ± 1.2 mg kg-1. Diacetyl, acetoin and 2,3 pentanedione were the ketones identified in Obushera. Esters detected in Obushera included ethyl lactate, ethyl acetate, ethyl butyrate and isobutyl acetate. Significantly higher (p <0.05) amounts of esters were detected in Enturire than in the other types of Obushera. Principal Component analysis, grouped Obushera into three categories (Ekitiribita, Obuteire/Obutoko and Enturire) based on flavour profile differences.
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3

Byakika, Stellah, Ivan Muzira Mukisa, Robert Mugabi e Charles Muyanja. "Antimicrobial Activity of Lactic Acid Bacteria Starters against Acid Tolerant, Antibiotic Resistant, and Potentially Virulent E. coli Isolated from a Fermented Sorghum-Millet Beverage". International Journal of Microbiology 2019 (16 dicembre 2019): 1–10. http://dx.doi.org/10.1155/2019/2013539.

Testo completo
Abstract (sommario):
Bacterial contamination of fermented foods is a serious global food safety challenge that requires effective control strategies. This study characterized presumptive E. coli isolated from Obushera, a traditional fermented cereal beverage from Uganda. Thereafter, the antimicrobial effect of lactic acid bacteria (LAB) previously isolated from Obushera, against the E. coli, was examined. The presumptive E. coli was incubated in brain heart infusion broth (pH = 3.6) at 25°C for 48 h. The most acid-stable strains were clustered using (GTG)5 rep-PCR fingerprinting and identified using 16S rRNA sequencing. E. coli was screened for Shiga toxins (Stx 1 and Stx 2) and Intimin (eae) virulence genes as well as antibiotic resistance. The spot-on-the-lawn method was used to evaluate antimicrobial activity. Eighteen isolates were acid stable and are identified as E. coli, Shigella, and Lysinibacillus. The Stx 2 gene and antibiotic resistance were detected in some E. coli isolates. The LAB were antagonistic against the E. coli. Lactic acid bacteria from traditional fermented foods can be applied in food processing to inhibit pathogens. Obushera lactic acid bacteria could be used to improve the safety of fermented foods.
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4

Mukisa, Ivan Muzira, Stellah Byakika e Arnold Serwanga. "APPLICATION OF REFRIGERATED AND FROZEN SORGHUM MALT SLURRIES IN THE PRESERVATION OF STARTER CULTURES FOR OBUSHERA FROM UGANDA". Food ScienTech Journal 2, n. 2 (1 dicembre 2020): 46. http://dx.doi.org/10.33512/fsj.v2i2.9120.

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5

Mukisa, Ivan M., Davide Porcellato, Yusuf B. Byaruhanga, Charles M. B. K. Muyanja, Knut Rudi, Thor Langsrud e Judith A. Narvhus. "The dominant microbial community associated with fermentation of Obushera (sorghum and millet beverages) determined by culture-dependent and culture-independent methods". International Journal of Food Microbiology 160, n. 1 (novembre 2012): 1–10. http://dx.doi.org/10.1016/j.ijfoodmicro.2012.09.023.

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6

Byakika, Stellah, Ivan Muzira Mukisa, Yusuf Byenkya Byaruhanga, Denis Male e Charles Muyanja. "Influence of food safety knowledge, attitudes and practices of processors on microbiological quality of commercially produced traditional fermented cereal beverages, a case of Obushera in Kampala". Food Control 100 (giugno 2019): 212–19. http://dx.doi.org/10.1016/j.foodcont.2019.01.024.

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7

MUKISA, I. M., D. G. NSIIMIRE, Y. B. BYARUHANGA, C. M. B. K. MUYANJA, T. LANGSRUD e J. A. NARVHUS. "OBUSHERA: DESCRIPTIVE SENSORY PROFILING AND CONSUMER ACCEPTABILITY". Journal of Sensory Studies, aprile 2010. http://dx.doi.org/10.1111/j.1745-459x.2009.00272.x.

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Tesi sul tema "Obushera"

1

Kateu, Kepher Kuchana, of Western Sydney Hawkesbury University, Faculty of Science and Technology e Centre for Advanced Food Research. "A study of traditional production of Ugandan fermented cereal beverage, Obushera". THESIS_FST_CAFR_Kateu_K.xml, 1998. http://handle.uws.edu.au:8081/1959.7/634.

Testo completo
Abstract (sommario):
The study presented here was to investigate the traditional production of the Ugandan fermented cereal beverage, Obushera. The effects of germination and malting of sorghum grains under different steeping treatment were first investigated. The traditional preparation of Obushera beverage was carried out and course of fermentation monitored. The viscosity of Obushera was very low throughout the fermentation process. The microflora responsible for the fermentation of Obushera were identified. After considerable research and conduction of tests were carried out, it was found that there was no detectable quantity of alcohol in Obushera. It was also confirmed that that there were no strains of alcohol producing yeasts, such as Saccharomyces sp. found in the Obushera.
Master of Science (Hons) (Food Science)
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2

Kateu, Kepher Kuchana. "A study of traditional production of Ugandan fermented cereal beverage, Obushera". Thesis, View thesis, 1998. http://handle.uws.edu.au:8081/1959.7/634.

Testo completo
Abstract (sommario):
The study presented here was to investigate the traditional production of the Ugandan fermented cereal beverage, Obushera. The effects of germination and malting of sorghum grains under different steeping treatment were first investigated. The traditional preparation of Obushera beverage was carried out and course of fermentation monitored. The viscosity of Obushera was very low throughout the fermentation process. The microflora responsible for the fermentation of Obushera were identified. After considerable research and conduction of tests were carried out, it was found that there was no detectable quantity of alcohol in Obushera. It was also confirmed that that there were no strains of alcohol producing yeasts, such as Saccharomyces sp. found in the Obushera.
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3

Kateu, Kepher Kuchana. "A study of traditional production of Ugandan fermented cereal beverage, obushera /". View thesis, 1998. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20040916.152810/index.html.

Testo completo
Abstract (sommario):
Thesis (M.Sc.)(Hons)--University of Western Sydney, Hawkesbury,1998.
"Thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science (Honours) in Food Science." Includes bibliographical references.
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