Evaluation of Antioxidant Activity On Plum Fruit (Prunus domestica L.) Skin Extract Applied For Natural Acid-Base Indicator

Akbar, Said Ali

doi:10.22373/ekw.v5i1.4516

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…The indicators of acid and base are complex compounds. These compounds react with acid or base, indicated with color changes based on the hydrogen ion concentration due to the titration process (Reshetnyak et al, 2017;Zoromba, 2017;Sukhanov et al, 2016;Mchedlov-Petrossyan et al, 2018;Udugala-Ganehenege et al, 2015;Baldigo et al, 2018;Akbar, 2019). Pawar et al (2021) explain that synthetic indicator is expensive.…”

Section: Introductionmentioning

confidence: 99%

The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora coccinea Linn) with Variances of Solvent and Soaking Period

Riyanti¹,

Marwoto

Priatmoko

et al. 2022

jppipa, pendidikan ipa, fisika, biologi, kimia

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This research developed a paper indicator made from extracted Ashoka flower, Ixora coccinea Linn, with solvent and the soaking period variances. Ashoka flower is a plant containing anthocyanin pigment. The plant is sensitive to acidic levels of pH. The content of the Ashoka flower brings significant potential as a natural indicator. The researchers extracted the anthocyanin pigment of the lower with the maceration method with 96% and 70% ethanol solvents for 24 hours. The researchers calibrated the extracted ethanol with buffer solution under pH 1-12. Then, the researchers cut 42 Whatman papers sized ±5x1 cm. The researchers put the papers into the mixtures of the extracted ethanol within 48 - 72 hours of the soaking period. After that, the researchers dried out the papers and examined the solution in terms of acid-base level. The papers made of extracted ethanol from Ashoka flower on solutions of HCl, CH3COOH, NH4OH, NaOH had their colors changed into brighter pink, pink, light green, and green-brownish. The color changes on the developed paper indicators made of extracted ethanol from Ashoka were extremely clear with a condition of 96% ethanol solution and 72 hours of soaking period.

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Section: Introductionmentioning

confidence: 99%

The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora coccinea Linn) with Variances of Solvent and Soaking Period

Riyanti¹,

Marwoto

Priatmoko

et al. 2022

jppipa, pendidikan ipa, fisika, biologi, kimia

View full text Add to dashboard Cite

show abstract

“…It is usually used to differentiate acid or base solution by providing different acid or base solutions (Fesseden & Fesseden, 1999). An acid-base indicator is complex compound and can react with acid or base features with colour changes based on the hydrogen ion concentration with titration process (Reshetnyak et al, 2013;Zoromba, 2017;Sukhanov et al, 2016;Petrossyan et al, 2018;Udugala-Ganehenege et al, 2015 ;Baldigo et al, 2018;Akbar, 2019) The function is based on the indicator features. They can provide different colours when they are added to acid or base solutions.…”

Section: Introductionmentioning

confidence: 99%

Acid-Base Indicator Paper Extracted from Rose (Rosa damascena Mill) and Asoka Flower (Ixora occinea Linn) Ethanols

Proceedings of the International Conference on Industrial Engineering and Operations Management

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This research aims to develop paper indicators extracted from rose (Rosa damascena Mill) and Asoka flower (Ixora coccinea Linn) ethanols. These flowers have anthocyanin pigment and are sensitive toward acidity (pH). The contents make rose and Asoka flower to have potentials as natural indicators. The anthocyanin pigment extraction from both flowers was done by maceration method with 96% ethanol solvent. It was done with 24 -hour soaking period. The ethanol extracts from rose and Asoka were calibrated by buffer solution with pH 1-12. Then, it was continued by cutting Whatman 42-paper sized ±5x1 cm. The paper was soaked in rose ethanol extract (Rosa damascena Mill) and Asoka flower (Ixora coccinea Linn) with a ratio of 1:1 for 24 hours. The indicator papers were dried then tested in acid-base solution. The indicator papers showed a colour change from pink, found in acid solution, to green-brownish, found in base solution. The findings showed that the rose and Asoka flower indicator papers could be used as an acidbase indicator. The produced indicator papers have several superiorities. They are made from natural materials, lesspolluted, more economical, more durable, and have contrast colour gradation.

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Base temperature for a phenological stage in plum cultivar Horvin (Prunus salicina Lindl.)

Orjuela-Angulo,

Parra-Coronado,

Camacho-Tamayo

2022

Rev. Colomb. Cienc. Hortic

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The plum (Prunus salicina Lindl.) is affected by the amount of water provided by its environment, as conditioned by climatic factors, especially temperature. Fruit development, in terms of physiological time or growing degree-days (GDD), is more accurate than quantification in terms of crop scheduling dates. The objective of this research was to determine the base temperature (Tb) of the phenological period between fruit set and harvest in Horvin plums and to express this duration in terms of GDD to determine the harvest date. Twenty trees were marked per locality at four different altitudes (2,449; 2,285; 2,215 and 2,195 m) in the municipality of Nuevo Colon, Boyaca. During 2015 and 2016, the dates of fruit set and harvest were recorded. Tb was estimated using different methods, as well as the GDD required to go from fruit set to harvest. The variance showed the best statistical fit between coefficient of variation and standard deviation for estimating Tb, with a high degree of correlation. The Tb for this phenological period was 2.9ºC. The results showed that a mean of 1,528 GDD and 81 days were required to pass from fruit set to fruit harvest.

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Evaluation of Antioxidant Activity On Plum Fruit (Prunus domestica L.) Skin Extract Applied For Natural Acid-Base Indicator

Cited by 4 publications

References 17 publications

The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora coccinea Linn) with Variances of Solvent and Soaking Period

The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora coccinea Linn) with Variances of Solvent and Soaking Period

Acid-Base Indicator Paper Extracted from Rose (Rosa damascena Mill) and Asoka Flower (Ixora occinea Linn) Ethanols

Base temperature for a phenological stage in plum cultivar Horvin (Prunus salicina Lindl.)

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