Antioxidant Potentials and Fatty Acid Composition of Extracts Sterculia Tragacantha Lindl. Leaves From Raja Ampat West Papua Province Indonesia

Sayuti, Mohammad; Supriatna, Iman; Hismayasari, Intanurfemi B; Budiadyani, I.G.A.; Yani, Ahmad; Saidin, Saidin; Asma, Siti

doi:10.7897/2230-8407.0910226

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…Gurame fish weight gain and feed supplementation give a good effect because of the content of vitamin C and flavonoid (Sulhi, Samsudin and Hendra, 2011). Aside from, Kebar's grass also contains very strong antioxidant activity IC 50 by 0.88 mg/ml, different from the methanol extract of S. trgacentha which one of Papua endemic plants containing antioxidant by 2.25 ppm (Sayuti et al, 2018) . The smaller the value of IC 50 , the higher the activity of antioxidant (Molyneux, 2004).…”

Section: Resultsmentioning

confidence: 91%

Untitled

2018

RJOAS

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Systematic risk is a risk that cannot be avoided and eliminated by diversification, the fluctuation of this risk is influenced by macroeconomic factors. This study aims to analyze the effect of Degree of Economic Leverage (DEL), Degree of Operating Leverage (DOL), and Degree of Financial Leverage (DFL) on the property and agriculture sector in Indonesia. In this study, researcher used secondary data; those are weekly common stock return and weekly market return published by Indonesia Stock Exchange, for determining beta coefficients. Subsequently, sales, EBIT, EAT, and annual inflation are utilized to calculate DEL, DOL, and DFL. Samples were taken by using purposive sampling and sample selection criteria. This research used panel data regression analysis using E-views 9. The result of this research showed that (1) partially, only the variable DEL and DFL that influence significantly to systematic risks of stock on a property sector and (2) partially, only the variable DEL and DOL that influence significantly to systematic risks of stock on sector of agriculture. Therefore, investors should invest in property sector companies that have a low value of DEL, DOL, and DFL to minimize systematic risk of stocks. And in the agriculture sector companies investors should invest in companies that have a high value of DEL, DOL, and DFL to minimize the systematic risk of stocks. KEY WORDS Systematic risk, economic leverage, operating leverage, financial leverage, property, agriculture.above the DOL variable has a positive effect or is directly s. DOL variable has a probability value of 0.1256 with a coefficient value of 0.00827. These results indicate that every increase in 1 unit of DOL, so that the systematic risk of all issuers in the model will increase by 0.00827 units.coefficient are in accordance with the theory and hypothesis proposed in DOL has a positive effect on the same conditions as the Karuniandari ( 2006), Kartini and Nevsi Rizki Herine Tjun (2009) which showed a positive relationship between DOL and systematic risk on issuers of manufacturing and mining sub-This finding indicates that the DOL value can increase the value of stocks systematic risk in the property sector companies, which is marked by a positive but insignificant DOL Grifin and Dugan (2003). This finding indicates that EBIT changes because sales changes cannot explain systematic ted because a small change in the level of sales does not that can be seen in The increase in the level of sales in property sector companies is not proportional Based on Table 3 above the DFL variable has a positive effect on the real level of 5% r is directly proportional to stocks systematic risk. DFL variable has a probability value of 0.0013 with a coefficient value of 0.00961. These results indicate that for every increase in 1 e model rise by 0.00961 units.

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Section: Resultsmentioning

confidence: 91%

Untitled

2018

RJOAS

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“…Gurame fish weight gain and feed supplementation give a good effect because of the content of vitamin C and flavonoid (Sulhi, Samsudin and Hendra, 2011). Aside from, Kebar's grass also contains very strong antioxidant activity IC 50 by 0.88 mg/ml, different from the methanol extract of S. tragacantha which one of Papua endemic plants containing antioxidant by 2.25 ppm (Sayuti et al, 2018) . The smaller the value of IC 50 , the higher the activity of antioxidant (Molyneux, 2004).…”

Section: Materials and Methods Of Researchmentioning

confidence: 91%

Nutrient Composition and Secondary Metabolite of Rumput Kebar (Biophytum Petersianum Klotzsch)

Sayuti¹,

Supriatna²,

Hismayasari³

et al. 2018

RJOAS

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Kebar's grass (Biophytum petersianum Klotzsch) was collected from Central and East Kebar region, Manokwari, West Papua, Indonesia in April 2018. The objective of this research was to determine secondary metabolite content in Kebar's grass (B. petersianum, Klotzsch). Kebar's grass sample was cleaned, dried, ground, and analyzed using a procedural standard to get chemical composition, vitamin C content, antioxidant activity, and anti-nutrient content.Based on the research result, the average score of proximate composition for Kebar's grass (B. petersianium Klotzsch) is 5.99% protein, 3.47% fat, 7.81% water, 14.25% ash, 68.47% carbohydrate, 418.20 mg/100g vitamin C, and 0.88 mg/ml antioxidant activity. Kebar's grass (B. petersianium Klotzsch) also contains anti-nutrient compounds/secondary metabolites; flavonoids, tannin, error tannin, phenolic, polyphenol. The test result of TLC-Spectrophotodensitometry shows that Kebar's grass (B. petersianum Klotzsch) contains rutin flavonoid, hyperoside, quercitrin, quercetin, and positively contains phenol and triterpenoid. This research reaches a conclusion that Kebar's grass (B. petersianium Klotzsch) contains essential secondary metabolite compounds for a human.

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“…D9132, Merck KGaA) was used to examine the antioxidant properties of the essential oils. The measurement was based on the method described in (Sayuti et al, 2018). The essential oils were prepared by diluting 100 mg of peel oil in 1 mL of ethanol, producing a concentration of 1 mg/mL.…”

Section: Dpph Free-radical Scavenging Capacitymentioning

confidence: 99%

Antioxidant Activities of Essential Oils from Citrus × natsudaidai (Yu. Tanaka) Hayata Peels at Different Ripening Stage

Yang¹,

Choi²,

LEE³

et al. 2022

J. Korean Wood Sci. Technol.

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The essential oil extracted from Citrus × natsudaidai (Yu. Tanaka) Hayata peels is known to have various biological properties. However, the chemical composition of essential oil is influenced by the ripening stages of fruits, which then affects related biological activities. This study investigates the antioxidant activities of essential oils extracted from Citrus × natsudaidai peels at different ripening stages (immature, mature, and overripe). The essential oils were extracted using the hydro-distillation method. As a result of gas chromatography-mass spectrometry (GC-MS) analysis, d-limonene was dominant and was increased as matured. However, γ-terpinene was decreased. The antioxidant properties and their total phenolic content (TPC) were influenced by the ripening stages. The TPC was highest in the immature stage of essential oil (1,011.25 ± 57.15 mg GAE/100 g). 2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity was excellent in the immature stage (EC50 = 15.91 ± 0.38 mg/mL). 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity was superior in overripe stage (EC50 = 20.43 ± 0.37 mg/mL). The antioxidant activity measured using ferric reducing antioxidant power (FRAP) assay showed higher values for the essential oils in immaturity (1,342.37 ± 71.07 mg Fe 2+ /100 g). Comprehensively, the essential oil in the immature stage showed the best antioxidant activity. Finally, knowing the chemical composition and antioxidant activity at different ripening stages will provide data for selecting the right fruit.

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Antioxidant Potentials and Fatty Acid Composition of Extracts Sterculia Tragacantha Lindl. Leaves From Raja Ampat West Papua Province Indonesia

Cited by 4 publications

References 23 publications

Untitled

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Nutrient Composition and Secondary Metabolite of Rumput Kebar (Biophytum Petersianum Klotzsch)

Antioxidant Activities of Essential Oils from Citrus × natsudaidai (Yu. Tanaka) Hayata Peels at Different Ripening Stage

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