The general objective of this study was to determine the phytochemical contents of mahogany leaves and winged seeds. Ethanol extracts of mahogany winged seeds and leaves underwent qualitative tests for anthraquinones and ...

For the past thirty years the Sugar Regulatory Administration, including the defunct Philsugin and Philsucom, have been equipped only to use soil testing as the main basis for fertilizer recommendation. This system of ...

Peppers are rich in vitamins especially vitamin C and minerals like calcium, phosphorus, iron and a pungent ingredient known as capsaicin. Peppers are used as condiment and extensively in flavoring meats such as sausages ...

Anthocyanins, the natural colorants that belong to a group of plant compounds called flavonoids, are responsible for most of the red, orange, purple, violet, magenta, and blue colors found in fruits, vegetables, legumes, flowers, and other plants. The six vegetables specifically imparting the red-violet to purple color which are of interest to the researcher are camote (Ipomoea batatas), lupo (Alternanthera sessilis), kolitis (Amaranthus tricolor), kadios (Cajanus cajan), balagay (Psophocarpus tetragonolobus), and sitaw (Vigna sesquipedalis). The objectives of this study were to quantify the total anthocyanin content (TAC) from each particular vegetable’s part which are the leaves, seedpods, and the seeds; and relate them to their anti-oxidant and disease-fighting potentials to benefit humankind. Total anthocyanin content in the methanol extracts were analyzed using the pH differential method. Spectrophotometric quantitation was used at 520 nm and the concentration was expressed as ug/g cyanidin-3-glucoside. Results showed that 4 out of these 6 vegetables have positive values for TAC. Balagay has the least TAC (5.68 ± 0.6), followed by camote tops (6.57 ± 0.3), sitaw (18.2 ± 0.1), and finally kadios having the highest value (50.6 ± 1.1). On the other hand, 2 vegetables were found to have negative values for TAC, lupo (-6.98 ± 0.1) and kolitis (-1.25 ± 0.1), which are suspected to have another type of plant pigment, specifically a betalain. It is recommended that qualitative tests be performed on both plants, to confirm the presence of betalains, and quantify them if proven present; determine the antioxidant properties of each; and identify what specific compound causes this property. It is further recommended to include at least one of the four vegetables in the diet due to its many health benefits, at affordable prices....

Symplocos polyandra, locally known as balakbakan, is distributed throughout Southeast Asia, especially in the Philippines. The lack of available literature regarding the phytochemistry of this plant species prompted the conduct of testing of its potential antioxidant activity and quantification of its total flavonoid content and phenolic content. Balakbakan leaves were collected, exhaustively extracted with methanol, and fractionated on a silica gel column. 2,2-diphenyl-1-picrylhydrazyI (DPPH) assay showed that the acetone fraction has the highest percent DPPH radical inhibition with 86.41% at 500 ppm compared to 0.5 mM ascorbic acid at 87.61%. The acetone - methanol fraction has the highest ferric reducing capacity with a value of 208.24 μM ascorbic acid equivalents at 500 ppm. The total phenolic content of the different fractions ranged from 21.88 to 29.99 pg/mL catechin equivalents, with hexane - acetone fractions having the highest value. The flavonoid content ranged from 14.28 to 16.64 pg/mL catechin equivalents, with the methanol fraction having the highest value. The compounds responsible for the high antioxidant activity may not be a phenolic or flavonoid. Fractions from Symplocos polyandra are a promising source of bioactive compounds with antioxidant activity. Cytotoxicity test and analyses of alkaloid and chlorophyll content of the leaves is recommended for the leaves to be developed into tea products....

The purpose of this study is to investigate the antioxidant activity of fractions from epicarpium of Citrofortunella microcarpa (Philippine Lime) peels extract. Dried epicarpium of peels were extracted with methanol and fractionated with silica column and subjected to DPPH and FRAP assays as well as determination of total phenolic and flavonoid content. Three fractions were obtained after silica gel fractionation. The acetone-methanol fraction had the highest antioxidant activity with 81.06% DPPH radical inhibition and ferric reducing capacity of 1420.33 pM Fe²⁺ released, in comparison with ascorbic acid standard of 88.26% DPPH inhibition and ferric reducing activity of 502.038 ascorbic acid equivalents, respectively. The acetone-methanol fraction also contained the highest total phenolic and flavonoid content at 73.26 and to 55.11 μg/mL catechin equivalents, respectively. This demonstrates that the high antioxidant activity of the acetone-methanol fraction can be attributed to its high total phenolic and flavonoid content. Value could be added to calamansi waste peels by developing the peels extracts into products such as high antioxidant functional foods, or antioxidant dermal cream or ointments....

Calamansi is a condiment used in a vast variety of Filipino dishes, as well as an ingredient in various beverages, such as calamansi juice. Calamansi peels are discarded as waste. Thus, this research study was conducted ...

This study evaluated the potential in vitro inhibitory activity of Basella alba leaves against enzyme markers of diabetes mellitus, α-amylase, and α-glucosidase. The dried plant sample was ground into fine powder, defatted, and soaked in methanol to obtain the crude extract. The crude methanolic extract of Basella alba was then fractionated sequentially in acetone-methanol mixtures with increasing solvent polarity ratios. Fractions obtained were evaluated for their α-amylase and α-glucosidase inhibitory potential. The standard drug, acarbose inhibited 37.44 ± 7.65%, 83.99 ± 0.86%, and 86.52 ± 0.40% of α-amylase activity at 10, 30, and 50 ppm. The highest inhibition was observed in the acetone-methanol (4:1) fraction which inhibited 57.80 ± 0.71%, 56.39 ± 0.49%, and 46.94 ± 0.26% of α-amylase activity, followed by the acetone fraction with inhibitory activity of 22.24 ± 0.41%, 38.05 ± 0.68%, and 46.62 ± 0.32% at increasing concentrations of 50, 200, and 350 ppm, respectively. The acetone-methanol (1:4) mixture exhibited the lowest activity at 8.00 ± 0.35% for 50 ppm, and 0.61 ± 0.27% for 200 ppm. However, no inhibitory activity was demonstrated in any of the fractions of Basella alba against α-glucosidase. Total flavonoid content analysis revealed that all fractions have the same flavonoid content. Basella alba may serve an essential role in managing the risk of diabetes mellitus and is recommended for consumption on a regular basis....

Cucamelons (Melothria scabra) are found growing in the wild in the Philippines. The lack of available literature regarding the plant species prompted to conduct of this study. This study aimed to extract and fractionate bioactive components from cucamelon with potential α-amylase and α-glucosidase inhibitory activity. Cucamelon fruit samples were obtained from Brgy. Pagsanga-an Pavia, Iloilo, extracted with methanol, fractionated using silica column chromatography, and assayed for α-amylase and α-glucosidase inhibitory activity. Results show that most but not all of the fractions have α-amylase inhibitory activity. Only four fractions showed α-amylase activity, namely, acetone (8.97 ± 1.54), acetone: methanol, 4:1 (15.54 ± 2.12), acetone: methanol, 3:2 (11.30 ± 2.51), and acetone: methanol, 1:4 (17.94 ± 2.19). Only one fraction had α-glucosidase inhibitory activity, which is acetone: methanol, 3:2 (3.59 ± 1.10). Cucamelon has a low inhibitory activity for α-amylase and α-glucosidase, enzyme markers of diabetes, which can be compensated by increasing the daily intake. It is recommended that unripe cucamelon fruits can be eaten regularly as salads, or pickled to help prevent the risk of developing diabetes....

Calamansi fruits are commonly used in the Philippines and the peels are discarded as wastes. Epicarpium of calamansi peels were selected for analysis in this study in order to determine their potential in vitro inhibition ...