Spray drying of red (Hylocereus polyrhizus) and white (Hylocereus undatus) dragon fruit juices: physicochemical and antioxidant properties of the powder

Author(s):  
Kar-Hing Lee ◽  
Ta-Yeong Wu ◽  
Lee-Fong Siow
2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Tutut Puji Lestari

Dragon fruit Hylocereus polyrhizus  and Hylocereus undatus are familiy of cactus, grown in Malang. The high consumption of dragon fruit, have an impact on the fruit skin buildup that simply disposed of as trash. Dragon fruit skin is known to have a source of natural red dye, which is Betacyanin. The purpose of this study was to determine the characteristics of the dragon fruit peel extract Betacyanin Hylocereus polyrhizus and Hylocereus undatus as well as the stability of the organoleptic jelly, which will be developed into a learning materials atlas for class VIII Junior High School. The study was conducted in September-October 2015. The study was conducted in three stages. This type of research phase I and II is True Experimental, and phase III is development. The results of phase I shows that various concentrations of ethanol (70% and 90%) have an effect on the characteristics of the extract Betacyanin skin dragon fruit Hylocereus polyrhizus and Hylocereus undatus, but very significant effect on skin extract dragon fruit Hylocereus undatus the treatment of N2, EI at pH 4,5. Later in the phase II study results showed that different concentrations of extracts of the best Betacyanin significantly affect the organoleptic stability of jelly. The results of phase III is the development of phase I and II studies into Atlas media for 8th grade of  Junior High School.  


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Abd Rahim Huda-Shakirah ◽  
Yee Jia Kee ◽  
Kak Leong Wong ◽  
Latiffah Zakaria ◽  
Masratul Hawa Mohd

AbstractThis study aimed to characterize the new fungal disease on the stem of red-fleshed dragon fruit (Hylocereus polyrhizus) in Malaysia, which is known as gray blight through morphological, molecular and pathogenicity analyses. Nine fungal isolates were isolated from nine blighted stems of H. polyrhizus. Based on morphological characteristics, DNA sequences and phylogeny (ITS, TEF1-α, and β-tubulin), the fungal isolates were identified as Diaporthe arecae, D. eugeniae, D. hongkongensis, D. phaseolorum, and D. tectonendophytica. Six isolates recovered from the Cameron Highlands, Pahang belonged to D. eugeniae (DF1 and DF3), D. hongkongensis (DF9), D. phaseolorum (DF2 and DF12), and D. tectonendophytica (DF7), whereas three isolates from Bukit Kor, Terengganu were recognized as D. arecae (DFP3), D. eugeniae (DFP4), and D. tectonendophytica (DFP2). Diaporthe eugeniae and D. tectonendophytica were found in both Pahang and Terengganu, D. phaseolorum and D. hongkongensis in Pahang, whereas D. arecae only in Terengganu. The role of the Diaporthe isolates in causing stem gray blight of H. polyrhizus was confirmed. To date, only D. phaseolorum has been previously reported on Hylocereus undatus. This is the first report on D. arecae, D. eugeniae, D. hongkongensis, D. phaseolorum, and D. tectonendophytica causing stem gray blight of H. polyrhizus worldwide.


Author(s):  
Renata Amato Moreira ◽  
Mariane Aparecida Rodrigues ◽  
Deniete Soares Magalhães ◽  
Leila Aparecida Salles Pio ◽  
Dalilhia Nazaré dos Santos ◽  
...  

Abstract The objective of this work was to evaluate the viability of the micrografting of yellow dragon fruit (Selenicereus megalanthus) on different rootstocks, based on DNA content and anatomical analyses. The used rootstocks were: yellow dragon fruit, white dragon fruit (Hylocereus undatus), Saborosa (Selenicereus setaceus) dragon fruit, and the Cebra and Orejona red dragon fruit (Hylocereus polyrhizus) varieties. The experimental design was completely randomized with five treatments and four replicates of five plants. After 30 days of cultivation, the following traits were evaluated: length and diameter of the micrografts and microrootstocks; and root length, percentage of setting, and fresh mass of the micrografts. Flow cytometry analyzes were performed before and after micrografting to verify genetic stability and the occurrence of endoreduplication. In addition, histological sections were made in the micrografting region to verify the connections of vessels and tissues between the graft and the rootstock. Endoreduplication was observed in all treatments. The amount of DNA in the yellow dragon fruit micrograft increased on the red Orejona variety. The presence of vessel connections was verified between the micrografts and microrootstocks. The yellow dragon fruit was also more vigorous when grafted on Orejona. Based on DNA content and anatomical analyses, in vitro yellow dragon fruit micrografting is feasible in all used rootstocks.


2018 ◽  
Vol 11 (3) ◽  
pp. 223-225
Author(s):  
Deilson de Almeida Alves ◽  
João Esdras Lima ◽  
Marcus Alvarenga Soares ◽  
Josimara Mendes Rabelo ◽  
Maria do Céu Monteiro Da Cruz

Resumo. A pitaia Hylocereus spp. (Cactaceae) é uma espécie frutífera exótica com cultivo em fase de expansão no Brasil. Problemas com pragas ainda são poucos relatados. Com isso, o objetivo deste trabalho foi relatar a ocorrência da abelha arapuá Trigona spinipes (Fabr.)(Hymenoptera: Apidae) em espécies de pitaia Hylocereus undatus (Haw.) e Hylocereus polyrhizus (Weber) no município de Couto de Magalhães de Minas, Minas Gerais, Brasil. Os danos principais decorrentes do ataque ocorrem nos frutos maduros, depreciando o fruto para comercialização. Este registro demonstra que T. spinipes necessita ser monitorada pelo potencial causador de danos significativos em pitaia e consequentemente perdas na produção.Attack of Trigona spinipes (Fabr.) (Hymenoptera: Apidae: Meliponinae) in dragon fruit Hylocereus undatus (Haw.) and Hylocereus polyrhizus (Weber) (Cactaceae) in Couto de Magalhães de Minas, Minas Gerais State, BrazilAbstract. The dragon fruit Hylocereus spp. (Cactaceae) is an exotic fruit species with crop in expansion phase in Brazil. Problems with pests are still few reported. The objective of this work was to report the occurrence of the Trigona spinipes (Fabr.) (Hymenoptera: Apidae) bee on the dragon fruit species Hylocereus undatus (Haw.) and Hylocereus polyrhizus (Weber) in the municipality of Couto de Magalhães de Minas, Minas Gerais State, Brazil. The main damages resulting from the attack occur in the mature fruits, depreciating them for commercialization. This record demonstrates that T. spinipes needs to be monitored for the potential to damage dragon fruit and consequently production losses.


2014 ◽  
Vol 39 (6) ◽  
pp. 1656-1664 ◽  
Author(s):  
Sangeeta Saikia ◽  
Nikhil Kumar Mahnot ◽  
Charu Lata Mahanta

SCISCITATIO ◽  
2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Lusiana Dian Anjarsari ◽  
Dwi Aditiyarini ◽  
Guntoro

Lipstick is one kind of cosmetics which is used as lips colorant to increase self-confidence. Nowadays, lipsticks from natural source is popular to reduce the negative impact of chemical compound or synthetics colorant in lipstick intensively for health. Super red dragon fruit is one kind of natural ingredients which can be used as colorant for lipstick. Moreover, this fruit is rich of antioxidant and antibacterial component that is good for skin health. In this research, extract of super red dragon fruit flesh was added in the lipstick during preparation with variation of concentration 0, 10, 20, 30 and 40%. Antioxidant analysis resulted the IC50 value in 81.55% indicating the strong antioxidant properties. Furthermore, the concentration of dragon fruit extract 40% was able to inhibit the growth of Staphylococcus aureus bacteria.


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