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UPV Theses and Dissertations

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    A historical analysis of Pintado (Euphorbia heterophylla)
    Alcarde, Annabelle Z. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1994-03)
    A histochemical study on Euphorbia heterophylla, a shrubby plant of the Family Euphorbiaceae was performed to screen the plant for the presence of medically important substances that could be responsible for its curative powers. Results of the analysis showed that aldehydes are highly detectable in the stem (xylem and phloem); moderately detectable in the leaf (xylem), stem (epidermis and vascular cambium), root (phloem) and flower (ovary); and slightly detectable in the flower (calyx). Alkaloids are moderately detectable in the stem (xylem, vascular cambium, and phloem) and slightly detectable in the leaf (xylem, vascular cambium, epidermis, and phloem). Amygdalin is highly detectable in the leaf (xylem) and stem (epidermis); moderately detectable in the root (phloem), and fruit (seed and pericarp); and slightly detectable in the root (xylem) and the flower (ovary). Arbutin is highly detectable in the xylem of the leaf and pericarp of the fruit; moderately detectable in the phloem of the leaf and vascular cambium of the stem; and slightly detectable in the stem (xylem, phloem, and epidermis), root (xylem), and flower (ovary). Saponins are highly detectable in the leaf (xylem, phloem, and epidermis), (xylem), root (xylem and phloem), flower (calyx and ovary) and fruit (seed). Formic acid is moderately detectable in the leaf and stem (epidermis), and slightly detectable in the stem and root (xylem). Oxalic acid is slightly detectable in the stem (phloem). Tannins are highly detectable in the stem (xylem and phloem) and fruit (pericarp); moderately detectable in the leaf (xylem and phloem) and fruit (seed); and slightly detectable in the stem (epidermis).
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    Physico-chemical assessment of the groundwater in Barangay Mohon, Arevalo District, Iloilo City
    Adenix, Kimberly V. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2017-06)
    Water analysis determines the stability and reliability of natural water sources. Determining the physical and chemical compositions of water would indicate its safety for use and consumption. In this scientific study, water analysis was conducted to evaluate the quality of potable water from eight water pumps, commonly used for drinking, in Brgy. Mohon, Arevalo District, Iloilo City. Aside from drinking, most residents also used these groundwater sources for cooking, bathing, washing, and laundry purposes. The parameters tested were pH, temperature, alkalinity, phosphate, nitrite, dissolved oxygen, and heavy metals (e.g., lead, copper, and cadmium) content. The analyses were conducted from February to April with same time of collection (9:00 am-12:00 nn) and the samples were stored under dark and cold conditions (4 °C). During the analyses, the following methods were used: titrimetric for alkalinity and dissolved oxygen content, colorimetric and UV/Vis spectrophotometry for phosphate and nitrite-nitrogen, and atomic absorption spectroscopy (AAS) for heavy metals. Results showed that all sampling sites were determined to have alkaline waters (7.29- 7.77), because of the high pH and alkalinity values. Also, it was found that the water sources contained very high phosphate levels (0.54-1.29 mg/L PO4-P) that contributed to very low DO levels (0.12-0.14 mg/L DO). Other parameters, such as nitrite-nitrogen and heavy metal determinations showed no significant difference based on the standard limits set by different environmental institutions.