scholarly journals Phytochemical and Antioxidant Analysis of Fermented ‘Dayak’ Wild Yam (Dioscorea hispida Dennst), Purple Yam (Dioscorea alata) and Air Potato (Dioscorea bulbifera L.) Tuber Flour

2021 ◽  
Vol 810 (1) ◽  
pp. 012005
Author(s):  
Rudito ◽  
Suwarto ◽  
Yuli Witono ◽  
Bernatal Saragih ◽  
Enos Tangke Arung
Keyword(s):  
Dioscorea Alata ◽  
Dioscorea Bulbifera ◽  
Purple Yam ◽  
Wild Yam

scholarly journals Comparison of Different Hydrocolloids on the Novel Development of Muffins from “Purple Yam” (Dioscorea alata) Flour in Sensory, Textural, and Nutritional Aspects

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Dewni Gunasekara ◽  
Ashani Bulathgama ◽  
Indira Wickramasinghe
Keyword(s):  
Xanthan Gum ◽  
Guar Gum ◽  
Nutritional Composition ◽  
Ash Content ◽  
Dioscorea Alata ◽  
Bakery Products ◽  
The Novel ◽  
Gluten Free ◽  
Overall Acceptability ◽  
Purple Yam

Hydrocolloids can act as gluten substitutes to form the structural equivalents of the gluten network in gluten-free bakery products. “Purple yam” (Dioscorea alata) is one of the underutilized yams in Sri Lanka with high nutritional potential. The overall objective of this study was to develop gluten-free muffins using “Purple yam” (Dioscorea alata) flour with hydrocolloids (pectin, xanthan gum, and guar gum) and investigate the nutritional composition and selected properties of the muffins. The texture profiles of gluten-free muffins were analyzed through the following parameters: hardness, adhesiveness, cohesiveness, etc. The chromameter values were obtained and sensory evaluations for gluten-free muffins were carried out. The highest moisture content was recorded in pectin-incorporated muffins ( 17.70 ± 0.50 % ). The protein content of all three types of muffins was around 5%. The highest fat content was recorded in pectin-incorporated muffins ( 19.26 ± 0.51 % ). The ash content of all three types of muffins was around 2%. Potassium was the most predominant element found in each muffin. The hardness of guar gum-incorporated muffin ( 6379.3 ± 135.9   g ) was greater than that of the pectin-incorporated one ( 6082.3 ± 23.4   g ). Xanthan gum-incorporated muffins had significantly decreased cohesiveness ( 0.19 ± 0.04 ). The highest springiness was obtained in pectin-incorporated muffin ( 37.13 ± 1.61   mm ). The descending order of the chewiness of muffin is pectin − added > xanthan   gum − added > guar   gum − added sample. According to the sensory evaluation, pectin-incorporated muffin was the best as it had obtained the highest sum of ranks for appearance, color, taste, after taste, and overall acceptability.

scholarly journals Dioscorea alata as Alternative Culture Media for Fungal Cultivation and Biomass Production

2021 ◽  
Vol 44 (2) ◽  
Author(s):  
Suwapha Sawiphak ◽  
Aroon Wongjiratthiti ◽  
Chanankarn Saengprasan
Keyword(s):  
Biomass Production ◽  
Ph Value ◽  
Culture Media ◽  
Culture Conditions ◽  
Inoculum Size ◽  
Dioscorea Alata ◽  
Optimal Conditions ◽  
Potato Dextrose Broth ◽  
Fungal Cultivation ◽  
Purple Yam

Dioscorea alata (purple yam) is a tuber crop that contains plenty of nutrients. It is widely cultivated in Thailand, but it is underutilized. In this study, the suitability of purple yam to replace potato dextrose media for fungal growth was investigated. Mushrooms and molds were grown on purple yam dextrose agar (PYDA), whereas yeasts were cultured in purple yam dextrose broth (PYDB). Response surface methodology (RSM) with Box-Behnken design (BBD) was used to optimize the culture conditions for Saccharomyces cerevisiae biomass production. The growth profile of S. cerevisiae in PYDB under optimized culture conditions was also studied. All test mushrooms and molds recorded the highest colony diameter and mycelial dry weight on PYDA containing 40% purple yam. Similar to mushrooms and molds, yeasts in PYDB with 40% purple yam showed the highest number of cells. The growth of fungi on purple yam dextrose media was significantly higher than those on potato dextrose media under standard conditions. The optimal conditions from the RSM results for the biomass production of S. cerevisiae in PYDB were purple yam concentration of 49.61%, dextrose concentration of 4.87%, pH value of 5.74, and inoculum size of 7.00%. The biomass of S. cerevisiae in PYDB under the optimal conditions obtained from the results of the optimization by RSM was thirty times higher than S. cerevisiae biomass in potato dextrose broth under standard conditions. Our results suggest that purple yam could be an alternative to potato dextrose media for fungal cultivation.

The beneficial effects of purple yam (Dioscorea alata L.) resistant starch on hyperlipidemia in high-fat-fed hamsters

2019 ◽  
Vol 10 (5) ◽  
pp. 2642-2650 ◽  
Author(s):  
Tao Li ◽  
Hui Teng ◽  
Fengping An ◽  
Qun Huang ◽  
Lei Chen ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Gut Microbiota ◽  
Resistant Starch ◽  
Dioscorea Alata ◽  
High Fat ◽  
Beneficial Effects ◽  
Purple Yam

In this study, we investigated the interventional effect of resistant starch (RS) obtained from purple yam (Dioscorea alata L.) on regulating lipid metabolism and gut microbiota in hyperlipidemic hamsters.

Étude des index d'ADN de huit espèces d'ignames (Dioscorea sp.) par cytométrie en flux

1992 ◽  
Vol 70 (5) ◽  
pp. 996-1000 ◽  
Author(s):  
Perla Hamon ◽  
Jean-Paul Brizard ◽  
Jeanne Zoundjihékpon ◽  
Christophe Duperray ◽  
Alain Borgel
Keyword(s):  
Flow Cytometry ◽  
Chromosome Number ◽  
Wild Species ◽  
Dioscorea Alata ◽  
Base Pairs ◽  
Dna Index ◽  
Cytométrie En Flux ◽  
Cultivated Species ◽  
Dioscorea Cayenensis ◽  
Dioscorea Bulbifera

Nine species (wild and cultivated) and some interspecific (wild × cultivated) hybrids were analysed by flow cytometry. This study confirms various polyploidy levels within cultivated species. DNA index varied by a factor of 1 to 3 for Dioscorea alata, 1 to 2.25 for Dioscorea bulbifera, and 1 to 2 for Dioscorea cayenensis-rotundata, depending on the clone or cultivar considered. In wild species, only one DNA index per species was obtained. Whenever a relationship between DNA index and chromosome number could be established, the size of genome 1C was evaluated in picograms and base pairs. Two genome sizes were observed: genome A in D. cayenensis-rotundata, Dioscorea abyssinica, Dioscorea mangenotiana, and Dioscorea praehensilis and genome B in Dioscorea togoensis. These genomes were small sizes, only 1.5 to 2.1 times larger than that of Arabidopsis. Key words: yams, Dioscorea, flow cytometry, DNA index, genome size.

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