Phytochemical Screening and Antioxidant Activity of Selekop (Lepisanthes Amoena) Fruit

Selekop (Lepisanthes amoena (Hassk.) Leenh.) plant leaves are used by the Dayak tribe of East Kalimantan as traditional cosmetics. Selekop fruit is also edible, but not well known. This study was conducted to obtain the phytochemical content and antioxidant assay in flesh, seed and pericarp extracts from the fruit of Selekop. Phytochemical analysis was conducted on ethanol extract for identification of flavonoid, alkaloid, tannin, saponin, triterpenoid and steroid. The antioxidant activity was done by DPPH assay with ascorbic acid as positive control. The flesh contained flavonoid, saponin, and tannin; the seed contained flavonoid, alkaloid, saponin, triterpenoid, and tannin; and the pericarp contained flavonoid, alkaloid, saponin, triterpenoid, and tannin. Analysis of antioxidant activity revealed the following Inhibitory Concentration (IC50 values): 122.51 ppm of flesh, 63.30 ppm of seed, 53.21 ppm of pericarp and 3.06 ppm of ascorbic acid. Based on these results, the ethanol extract of the seed and the flesh had a phytochemical content and antioxidant activity which was better than the flesh extract from Selekop fuit

Secang (Caesalpinia Sappan) : Telaah Aktifitas Biologis dan Potensi Pemanfaatannya

Plant resources serve abundant useful biological active substances. Secang, a local name of Caesalpinia sappan (Leguminosae), promise high possibility for a broad-ranging purposes due to its biological activities. In traditional manner, the wood of secang is used for coloring agent for beverages, foods and cosmetics. Several phytochemicals were isolated from the secang extract, including Brazilin, brezilein, protosappanin, 4-0-methy/ sappanol, caesalpin, kampesterol and b-sitosterol. Secang extract and the compounds thereformhave been reported to possess a huge variety of biological activities such asantioxidant, antibacterial, antifungal, anticancer, natural contraceptive and xanthine oxidase (XO) inhibitor.The biological activities of the extracts andph vtochemicals ftrom secang may give scientific basis for their application in agricultural, food processing, medical and other industries

Aktivitas Anti Mikroba dari Ekstrak Bawang Tiwai

Bawang tiwai (Eleutherine americana L. Merr) has chemical compound such as carbohydrate, protein, fat, alkaloid, flavonoid, carbocylate acid, aldehyde­ keton, thanin and phenol. Bawang tiwai is used by the ethnic of Dayak in Eas Kalimantan for spicy and medicine. Information about this chemical compound should be studied further and one of the study is to know the characteristic and activity of bawang tiwai as antimicrobial activity. The extract of bawang tiwai using methanol solvent has characteristic of brown concentrated solid (gummy), non crystalin, non aromatic and the extract of bawang tiwai using the solvent of n-tiexene. dietil ether and elit acetate has a characteristic of yellow brownies solid, bit oil, and both extractives are dissolved in acetone and methanol. Repeated seperetion with hexen, etil acetate, benzene-acetone using a coloum chromatography resulted in old yellow to brown fraction and aromatic. The fraclions resulted by step one and two separation are able to resist the growth of salmonella thypi and Bacillus cereus

Aktivitas Anti Mikroba dari Ekstrak Bawang Tiwai

Bawang tiwai (Eleutherine americana L. Merr) has chemical compound such as carbohydrate, protein, fat, alkaloid, flavonoid, carbocylate acid, aldehyde­ keton, thanin and phenol. Bawang tiwai is used by the ethnic of Dayak in Eas Kalimantan for spicy and medicine. Information about this chemical compound should be studied further and one of the study is to know the characteristic and activity of bawang tiwai as antimicrobial activity. The extract of bawang tiwai using methanol solvent has characteristic of brown concentrated solid (gummy), non crystalin, non aromatic and the extract of bawang tiwai using the solvent of n-tiexene. dietil ether and elit acetate has a characteristic of yellow brownies solid, bit oil, and both extractives are dissolved in acetone and methanol. Repeated seperetion with hexen, etil acetate, benzene-acetone using a coloum chromatography resulted in old yellow to brown fraction and aromatic. The fraclions resulted by step one and two separation are able to resist the growth of salmonella thypi and Bacillus cereus

Aktivitas Anti Jamur Ekstrak Kulit Kayu Laban (Vitex Pubescens Vahl) (Antifungal Activity of Laban (Vitex Pubescens) Bark Extracts)

The most of antifungi used in preservatives for wood, food, fungicides, dyestuff, etc. come from synthetical substances, that poisoned not only for fungi but also for environment. In recent, antifungi have been taken from plants. Laban (Vitex pubescens Vahl) is one of high quality wood has been used in Kalimantan (Borneo). Isolation of active compounds will provide scientific validation for the use of laban in another purposes. The object of this research was to evaluate the antifungi activity of bark extract of Laban wood. Extractives solubility of laban bark in methanol was 6.03%. Soluble fractions in n-hexane, diethyl ether, and ethyl acetate yielded 0.27%, 0.39%, and 0.47% respectively. Fractions of n- hexane and diethyl ether contained steroid, flavonoid and carbohydrates. While, ethyl acetate fraction contained triterpeoids, flavonoids, and carbohydrates. Thin layer chromatography (TLC) test of laban bark extracts showed the active compounds of aldehide, keton, and flavonoids. The n-hexane-, diethyl ether-, and ethyl acetate extracts showed the significant anti fungal activities by air-borne method. Antifungal activity of o- hexane extract against Candida albicans was detected by a bioautography assay on TLC plate. The results showed that bark of laban possess potential antifungal activity to be developed as natural antifungal substances