GC-MS profiling of fatty acids and nutritional properties of the white and brown teff [Eragrostis tef (Zuccagni) Trotter] varieties cultivated in different parts of Ethiopia

Yisak, Hagos; Yaya, Estifanos Ele; Chandravanshi, Bhagwan Singh; Redi‐Abshiro, Mesfin

doi:10.1016/j.jfca.2022.104405

Cited by 17 publications

(19 citation statements)

References 28 publications

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“…From the nutritional point of view, however, the present study revealed that the white teff and brown teff grain have no difference in antioxidant capacity. Furthermore, Yisak et al [9] have reported that the white and brown teff grain oil is rich in fat and essential fatty acids as compared to the other cereal grains. The average ratio of ω-6/ω-3 found in white (2.48) and brown teff (2.42) flour was comparable with the suggested 1-2:1 ratio for the normal human growth and development.…”

Section: Determination Of Antioxidant Activities Of the White And Bro...mentioning

confidence: 99%

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Total phenolics and antioxidant capacity of the white and brown teff [Eragrostic tef (Zuccagni) trotter] varieties cultivated in different parts of Ethiopia

Yisak¹,

Redi‐Abshiro²,

Chandravanshi³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. This study was aimed to determine the total phenolics contents and antioxidant capacity of white and brown teff grain samples. The free total polyphenolic content (TPPC), bound TPPC and total flavonoids content ranged from 62.1–129.9, 84.6–189.6 mg GAE/100 g and 84.4–195.1 mg QE/100 g, respectively, in white teff samples, and, 118.6–196.7, 141.1–195.1 mg GAE/100 g and 97.8–202.5 mg QE/100 g, respectively, in brown teff samples. Besides, the free 2,2-diphenyl-1-picrylhydrazyl (DPPH) and bound DPPH ranged from 74.8–98.3, 77.1–99.9 mg AAE/100 g, respectively, for white teff samples, and, 68.7–93.1 and 71.2–99.4 mg AAE/100 g, respectively, for brown teff samples. This study revealed that total phenolics content was higher in brown teff samples than white teff samples and is in agreement with other reports. However, their DPPH scavenging activities were nearly equal, indicating that both varieties of teff are relevant for human nutrition and health. Furthermore, the dendrogram has shown sharp separation of the samples based on their origin and variety related to the total phenolics parameters. Hence, findings of this study can help consumers appreciate the nutritional value of white and brown teff grains; provide them guidance for teff purchase and production. KEY WORDS: Teff, Phenolics, Gallic acid, Ascorbic acid, Anti-oxidant, DPPH Bull. Chem. Soc. Ethiop. 2022, 36(4), 749-766. DOI: https://dx.doi.org/10.4314/bcse.v36i4.3

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Section: Determination Of Antioxidant Activities Of the White And Bro...mentioning

confidence: 99%

“…It has the potential of growing in every part of the world [6]. It is a predominant source of nutrients like minerals, amino acids, dietary fibers, proteins, dietary polyphenols, starch, carbohydrates and vitamins [7], volatiles like aldehydes, ketones and alcohols [8], and fatty acids [9].…”

Section: Introductionmentioning

confidence: 99%

Total phenolics and antioxidant capacity of the white and brown teff [Eragrostic tef (Zuccagni) trotter] varieties cultivated in different parts of Ethiopia

Yisak¹,

Redi‐Abshiro²,

Chandravanshi³

et al. 2022

Bull. Chem. Soc. Eth.

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“…Distilled water was used as a solvent throughout the study. (14) tef samples were collected from the Minjar Shenkora district (North Shewa zone), Were Ilu district (South Wollo zone) of the Amhara region, Ada'a, Bishoftu, and Gimbichu districts (East Shewa zone) of the Oromia region, and Soro and Gomibora districts (Haddiya zone) of the Southern Nations Nationalities and Peoples Region (SNNPR) of Ethiopia Te selected areas are the major tef producing areas in the country. Te two varieties of tef samples (white and brown tef) were collected from 18, December 2020, to 18, January 2021, from local markets.…”

Section: Chemicalsmentioning

confidence: 99%

“…Though the total carbohydrate content of teff may vary in different ecology, studies have reported its content to be in the range of 57–86 %w/w [ 11 ]. The atherogenicity and thrombogenicity indices used to determine the lipid quality of the white and brown teff grain samples have indicated excellent status of grains compared to other cereal grains, which are useful for human nutrition and health [ 14 ]. Teff is a nutritious food even better than the major western staple cereals such as wheat, rice, oats, and barley, which is preferable for celiac disease patients and other types of gluten sensitivity as it is consumed as a whole grain [ 13 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Green UV-Vis Method for Direct Determination of Total Sugars in the Aqueous Extract of Teff (Eragrostis tef (Zuccagni) Trotter) Grains and Other Cereals

Yisak

Tukue

Redi‐Abshiro

et al. 2022

International Journal of Analytical Chemistry

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There is no ultraviolet visible (UV-Vis) spectrophotometric method for the direct determination of total sugars in the aqueous extract of teff grain samples. Therefore, the objective of this study was to develop a green UV-Vis spectrophotometric method to determine total sugars in the aqueous extract of white teff, brown teff, white rice, and red wheat grain samples. The calibration curve was established in the range of 20.11–7,907 mg/L using sucrose as a standard with R2 = 0.9996. The limit of detection and limit of quantification were 4.4 and 14.6 mg/L, respectively. The relative standard deviation (6.9%) of the method for the sucrose standard was within the acceptable range indicating that the method is precise. The amount of total sugars determined in the white teff (5.48–9.44% (w/w), brown teff (6.17–10.32% (w/w)), white rice (3.19% (w/w)), and red wheat (9.22% (w/w)) grain samples was comparable with other reported cereal grains. Furthermore, the accuracy of the developed analytical method was also evaluated by spiking the known amount of the sucrose standard solution to the white teff, brown teff, white rice, and red wheat sample extracts, and percentage recoveries found were in the acceptable range (85 ± 2 − 105 ± 4%) with an average recovery of 93%, confirming that the new green method is quantitatively reproducible. Hence, a fast, simple, inexpensive, widely used, selective, sensitive, precise, and accurate green UV-Vis method was developed and validated for the direct determination of total sugars in the aqueous extract of teff, white rice, and red wheat grain samples.

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“…Teff is a warm-season annual cereal and the only cultivated species in the genus Eragrostis which has originated in Ethiopia [14][15][16][17]. It is a whole grain and superior than other cereals due to being naturally gluten free and is the dominant source of nutrients like carbohydrates, amino acids, minerals, dietary fibers, proteins, dietary polyphenols, starch, and vitamins [5,16,18,19], volatiles like aldehydes, ketones and alcohols [16], and is rich in unsaturated fatty acids like linoleic, oleic and linolenic acids [17,20]. The ratio of ω-6/ω-3 found in the white and brown teff flour was almost consistent with the suggested 1-2:1 ratio and is recommendable for the normal human growth and development.…”

Section: Introductionmentioning

confidence: 99%

Water-soluble total sugars and total free amino acids of the two varieties of teff [Eragrostic tef (Zuccagni) Trotter] cultivated in different regions of Ethiopia

Yisak¹,

Chandravanshi²,

Redi‐Abshiro³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. Teff [Eragrostis tef (Zuccagni) Trotter] is cereal grain native to Ethiopia as staple food to millions of people. However, no research work has been reported for characterization with respect to water-soluble total sugars and total free amino acids in white and brown teff grains. The main objective of this study was to determine water-soluble total sugars and total free amino acids (TFAA) in the white and brown teff grain varieties. The determined water-soluble total sugar contents of white and brown teff grain sample extract was ranged between 2.69±0.12 – 4.56±0.08 g GE/100 g and 2.22±0.04 – 4.74±0.19 g GE/100 g, respectively. The mean TFAA contents for white and brown teff samples was found in the range between 181.4±30.0 – 638.9±42.6 mg AE/100 g and 471.7±37.0 – 927.1±32.4 mg AE/100 g, respectively. The mean value of the TFAA in brown teff samples was found higher than that of white teff samples. Pearson correlation was in the opposite direction, indicating that the biosynthetic pathways for the water-soluble total sugars and TFAA in both white and brown teff varieties might be opposite. Therefore, the present study indicated that teff is rich in the water-soluble total sugars and TFAA. KEY WORDS: Teff, Sugars, Amino acids, Glucose, Ninhydrin, UV-Vis spectrophotometry Bull. Chem. Soc. Ethiop. 2023, 37(2), 299-313. DOI: https://dx.doi.org/10.4314/bcse.v37i2.5

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GC-MS profiling of fatty acids and nutritional properties of the white and brown teff [Eragrostis tef (Zuccagni) Trotter] varieties cultivated in different parts of Ethiopia

Cited by 17 publications

References 28 publications

Total phenolics and antioxidant capacity of the white and brown teff [Eragrostic tef (Zuccagni) trotter] varieties cultivated in different parts of Ethiopia

Total phenolics and antioxidant capacity of the white and brown teff [Eragrostic tef (Zuccagni) trotter] varieties cultivated in different parts of Ethiopia

Development of Green UV-Vis Method for Direct Determination of Total Sugars in the Aqueous Extract of Teff (Eragrostis tef (Zuccagni) Trotter) Grains and Other Cereals

Water-soluble total sugars and total free amino acids of the two varieties of teff [Eragrostic tef (Zuccagni) Trotter] cultivated in different regions of Ethiopia

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