Total Phenolic and Antioxidant Capacity of Acetone Extract of Tristaniopsis merguensis Leaves

Roanisca, Occa; Mahardika, Robby Gus; Sari, Fajar Indah Puspita

doi:10.33019/jstk.v1i1.1274

Cited by 3 publications

(4 citation statements)

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“…The more phytochemical compounds that have antioxidant activity are extracted, the higher the antioxidant activity. Based on the results of the antioxidant activity test of the pelawan stem methanol extract, this is weaker when compared to the ethanol extract and acetone of pelawan leaves with consecutive IC 50 values of 18.2772 μg/mL (Enggiwanto et al, 2018) and 22.1454 μg/mL (Roanisca et al, 2019). It is due to the presence of alkaloids in pelawan leaves, while in pelawan stems, no alkaloids were found.…”

Section: Antioxidant Activitymentioning

confidence: 97%

“…Pelawan leaves contain secondary metabolites such as alkaloids, phenol, hydroquinones/tannins, and flavonoids. Another study found that the total phenolic content in pelawan leaves was 215.22 mg GAE/g dry extract and had a strong antioxidant activity with an IC 50 value of 22.1454 μg/mL (Roanisca, Mahardika, & Sari, 2019;Souhoka, Hattu, & Huliselan, 2019)). The research above shows that pelawan plants can be a source of antioxidants.…”

Section: Introductionmentioning

confidence: 98%

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Antioxidant Capacity Fraction of the Pelawan Stems (Tristaniopsis merguensis Griff)

Mahardika

Fajri

Henri

2023

Indo. J. Chem. Res.

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The impact of reactions free radical compounds can cause various health problems such as inflammation, aging, and cancer. Therefore, to avoid damage caused by free radicals, the body needs an important substance, antioxidants. Natural antioxidants are more recommended than synthetic antioxidants because synthetic antioxidants must be in accordance with the prescribed dose because they can cause side effects that are harmful to the body. This study aimed to determine the antioxidant activity of the extract and fraction of the Pelawan (Tristaniopsis merguensis Grifft.) stem extract. Antioxidant testing was carried out using the DPPH method on extracts and fractions of Pelawan stem extract (T. merguensis Grifft.). In addition, qualitative phytochemical testing was also carried out on extracts of the stems of Pelawan (T. merguensis). The results of the three solvent fractions, n-hexane, ethyl acetate, and methanol, were positive for flavonoid and phenolic secondary metabolites. Meanwhile, the antioxidant activity in reducing DPPH radicals in the methanol extract fraction of pelawan stems had a very strong activity with an IC50 value of 36.33 g/mL, while the ethyl acetate and n-hexane extract fractions had a very weak antioxidant activity with an IC50 value of 387.43 μg/mL dan 759.88 μg/mL.

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Section: Antioxidant Activitymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Antioxidant Capacity Fraction of the Pelawan Stems (Tristaniopsis merguensis Griff)

Mahardika

Fajri

Henri

2023

Indo. J. Chem. Res.

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“…The sample of this research was kelubi fruit that comes from Nyelanding Village, Air Gegas District, South Bangka Regency. Furthermore, the flesh of the kelubi was taken and then it was blended and then squeezed using a clean cloth, centrifuged and filtered to got the kelubi fruit water which was clean from fruit solids (Roanisca ., 2019). Kelubi fruit water aws ready to be used as a catalyst (Patil, 2011).…”

Section: Preparation Of Natural Acid Catalyst Of Kelubi Fruit (Eleiod...mentioning

confidence: 99%

Synthesis of dihydropyrimidinone derivatives using kelubi fruit (Eleiodoxa conferta) as a catalyst and its antibacterial activity

Sari

Nurhadini

Mahardika

2022

AJHAS

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Kelubi fruit is one of the many fruits that grow in Bangka Belitung which has a sour taste. Kelubi fruit contains ascorbic acid, malic acid and oxalic acid. The potency and sour taste of Kelubi fruit can be used as a catalyst in the synthesis of dihydropyrimidinone compounds and activity as antibacterial. Dihydropyrimidinone compounds were synthesized using synthesis with the basic ingredients of benzaldehyde, urea and ethyl acetoacetate using natural catalysts that are more environmentally friendly. The purpose of this study was to determine the optimum volume, time and temperature catalyst used by kelubi fruit to synthesize pyrimidine-derived compounds as antibacterial. The optimization results on the synthesis of dihydropyrimidinone compounds using kelubi fruit water as a catalyst (Eleiodoxa conferta) with a lot of 0.3 mL catalyst, temperature of 50ºC and reaction time of 4 hours with yield of 46.75%. Antibacterial activity of dihydropyrimidinone compounds against Stapylococcus aureus bacteria at a concentration of 10 ppm, 30 ppm including the category and a concentration of 75 ppm including the medium category. Antibacterial activity against Eschericia coli bacteria at concentrations of 30 ppm and 75 ppm was categorized as weak.

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“…The Bangka Belitung Islands have various potential endemic plants to be developed [12]. One of the interesting plants to study is the 'Pucuk Idat' (Cratoxylum glaucum).…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles via Cratoxylum glaucum Leaf Extract Loaded Polyvinyl Alcohol and Its Antibacterial Acitvity

Fabiani

Lingga

2022

JKPK

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In this study, green synthesis of silver nanoparticles via Cratoxylum glaucum leaf extracts loaded with polyvinyl alcohol and its bacterial activity were tested. Nanosilver from ‘Pucuk Idat’ leaves has a non-uniform size and tends to agglomerate, making the nanoparticle size unstable and challenging to apply further. Therefore, so that nanoparticles do not aggregate, efforts are made to add stabilizers. Polyvinyl alcohol (PVA) is a polymer that can be used as a stabilizer because it can prevent unwanted aggregation and oxidation processes. UV-Vis analysis results show that PVA as a stabilizer can avoid an increase in wavelength shift. Based on the results of this XRD analysis, it can be concluded that in this research sample, the silver nanoparticle is formed with a cubic crystal system, and it can be observed that the smallest average particle size is in the 0.75% Ag/PVA sample of 10.32 nm. Furthermore, based on the antibacterial test against E. coli and S. aureus, it can be explained that the 0.75% PVA-modified nanosilver sample showed weak to medium antibacterial activity..

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Total Phenolic and Antioxidant Capacity of Acetone Extract of Tristaniopsis merguensis Leaves

Cited by 3 publications

References 0 publications

Antioxidant Capacity Fraction of the Pelawan Stems (Tristaniopsis merguensis Griff)

Antioxidant Capacity Fraction of the Pelawan Stems (Tristaniopsis merguensis Griff)

Synthesis of dihydropyrimidinone derivatives using kelubi fruit (Eleiodoxa conferta) as a catalyst and its antibacterial activity

Green Synthesis of Silver Nanoparticles via Cratoxylum glaucum Leaf Extract Loaded Polyvinyl Alcohol and Its Antibacterial Acitvity

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