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    Heavy metals (Cr, Cu, Pb, and Zn) concentrations of road-deposited sediments within six public plazas in Iloilo City
    Caceres, Rizza Daphet E. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2011-04)
    Contamination from overland transportation is an unavoidable result of urbanization. Cr, Cu, Pb, and Zn arc common heavy metals introduced to the environment by transportation. Road-deposited sediment (RDS) samples were collected from six public plazas (Villa Plaza, Molo Plaza, Mandurriao Plaza, Plaza Libertad, Lapaz Plaza and Jaro Plaza) in Iloilo City from March 2010 to May 2010. 0.5M HC1 was used as extractant and heavy metals (Cr, Cu, Pb, and Zn) concentrations were determined using Flame Atomic Absorption Spectrophotometer (FAAS). The mean concentrations of Cr, Cu, Pb, and Zn in road-deposited sediments from six plazas were 8.79 ± 1.93, 40.90 ± 24.21, 60.74 ± 22.32, and 164.25 ± 25.0 mg/kg, respectively. Metal enrichment of Cr, Cu, Pb and Zn were approximately xl, x8, x7 and x18 more than the background values respectively. There was no significant temporal variation in metals concentrations of RDS between sampling collections. Generally, RDS from Plaza Libertad has the highest metal concentrations. Cu and Pb metals were highly correlated (R2 = 0.891) indicating possible similar sources. A good correlation (R2 = 0.918) was observed between Pb concentration and the number of vehicles that pass along the plaza per hour. Heavy metal concentrations in sediments from plazas have low hazard quotients but bioaccumulation of metals in the body could cause health effects. Efficiency of digestion procedures varied depending on characteristics, texture and composition of road-deposited sediments. 0.5M HC1 digestion was used because it is simple, cost-effective, time-efficient and it leaches out meaningful amounts of bioavailable metals. Using HC1 as extractant simulates human digestion since human stomach contains HC1 that could leach out metals if road-deposited sediments were ingested.
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    A comparative study of issue and candidate orientation of voters in rural and urban barangays
    Azzaraga, Josephine D. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1996-03)
    Voting is the most important political activity, and for most Filipinos the only means of political participation, engaged in by citizens in a democratic society. Thus, it is important to examine the degree of importance given by voters towards issues as opposed to candidates' ascribed personal traits and achievements and their (the voters’) particularistic interests’ when they cast their votes. The locale, which is either rural or urban, may possibly show different degrees of these influences on the voters. This study, therefore, seeks to determine the level of issue and candidate orientations of voters in rural and urban barangays. The study also aims to compare the level of issue and candidate orientations of voters from rural and urban barangays. Given these objectives, a survey was conducted in the rural barangays of Bacauan, Indag-an and North Kirayan in Miag-ao, Iloilo and the urban barangays of San Pedro, Rizal and Rizal Pala-pala II in Iloilo City with a total of 100 respondents. A questionnaire which contains issue and candidate orientation scales was used. These scales were designed to elicit the issue awareness and concern of the respondents when they chose their candidate for president in the 1992 election as well as the respondents' attraction towards candidates when they voted The findings of the study reveal that voters in rural barangays are moderately issue- oriented. The study also found a majority of the voters from urban barangays to be moderately issue oriented. Among rural voters, the level of candidate orientation was found to be moderate. Voters from urban barangays were found to have a moderate level of candidate orientation. Results of the study using the Mann-Whiney U test showed that voters from rural barangays were no less issue-oriented than those from urban barangays. Also, no difference was found in the level of candidate orientation of rural and urban voters. Results suggest that attitudes towards candidates and issues in national elections are not affected by the locale of the voter.