Undergraduate Theses
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Item Geochemical association of Cr, Cu, Ni, and Pb in the sediments of Iloilo River estuaryArban, John Paul B. (Division of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Visayas, 2005-04)The geochemical association of Cr, Cu, Ni, and Pb in the sediments of Iloilo River Estuary has been studied using a modified Tessier’s sequential extraction procedure. The results obtained show that most of the metals studied are mostly associated in the residual and organic matter fractions of the sediment samples (Cr: 66.26% - 74.36% in the residual,15.43% - 24.08% in the Fe-Mn oxide fraction, 8.14% - 12.71% in organic matter fraction, and 0.000% - 2.996% in the exchangeable/carbonate fraction; Cu: 39.30% - 46.73% in the residual, 12.00% - 52.18% in the organic fraction, 3.227% - 11.41% in the Fe-Mn fraction, and 0.000% - 17.43% in the exchangeable/carbonate fractions; Ni: 42.75% - 57.02% in the organic matter fraction, 24.93% - 39.33% in the residual, 5.814% - 14.15% in the Fe-Mn fraction, and 5.504% - 13.12% exchangeable/carbonate fraction; and Pb in sample AAA-21: 48.02% in the residual, 38.55% in the organic matter fraction, and 7.33% in the Fe-Mn fraction, and 6.078% in the exchangeable/carbonate fraction). The analysis of the total metal concentrations of the sediment samples taken from Iloilo River are found to be above the reported concentration of uncontaminated sediment except for Pb in sediment sample AAA-21 (Chromium: 102.1 ug/g - 150.5 pg/g; Copper: 62.56 pg/g - 111.7 pg/g; Nickel: 53.40 pg/g - 75.44 pg/g; and Lead in sample AAA-21: 22.21 pg/g). The study shows that about 50% of the total metal concentration in the sediment samples are bioavailable to the aquatic organisms.Item Chromatographic analysis and antibacterial assay of Avicennia officinalis bark extractsJanagap, Steve P. (Division of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Visayas, 2003-04)In this study, the antibacterial activity and the chemical constituents of Avicennia officinalis bark were determined. The antibacterial assay showed that the dichloromethane (DCM) fraction at 1000 ug/mL was most effective against the tested bacteria especially to Staphylococcus aureus. It had a microbial index of 0.97 while the positive control, amoxicillin had 1.00. The aqueous fraction did not show antibacterial activity to the organisms tested. A number of chemical constituents were found to be present in the different fractions obtained from Avicennia officinalis bark: alkaloids, cardiac glycosides, flavonoids, phenolic compounds, saponins and terpenes. These constituents were determined using thin layer chromatography. The DCM fraction which showed the highest bioactivity, had the most number of components while the aqueous fraction had the least number of components. The DCM fraction was subjected to two-dimensional thin layer chromatography. Nine spots were observed with the first solvent system (ethyl acetate-DCM; 5:3) while eleven spots were observed with the second solvent system (ethyl acetate-n-hexane-DCM; 2:1:1).Item Proximate analysis and fatty acid profile of Hyopila rosea Williams and Vesicularia reticulataAnuevo, Gwen M. (Division of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Visayas, 2000-07)Philippine mosses number about 506 species. Hyophila rosea Williams and Vesicularia reticulata are the two species that are found abundantly in Panay area. Hyophila rosea Williams are medium-sized plants in thin clusters with stems from 1-1.5 cm high. Proximately characterized to contain 17.82% moisture, 5.99% crude protein, 7.69% crude ether extract, 21.42% crude fiber, 18.21% ash, and 46.69% nitrogen-free extract. Fatty acid profiles are composed of twenty-nine (29) analytes, from which twenty (20) were not identified while nine (9) are known, starting from Caproic acid (C1o) to Arachidic (C20). Linoleic, palmitic, and oleic acids are the first three analytes comprising higher percentages. Vesicularia reticulata, on the other hand, are dull, yellowish green, and the main stem is about 5 cm long. Proximately characterized to contain 12.73% moisture, 5.96% crude protein, 9.45% crude ether extract, 21.95% crude fiber, 32.67% ash, and 29.96% nitrogen-free extract. Fatty acid profiles are composed of forty-one (41) analytes, from which thirty-two (32) analytes were not identified, while nine (9) analytes are known starting from C1o to C2o.Linoleic, palmitic and linolenic acids are the first three analytes comprising higher percentages.Item Toyang Ermitanya and the consumption of Iloilo City proper-based listeners vis a vis Miagao-based listenersAbenes, Darren Al B.; Concepcion, Ma. Emilee Anne R.; Paren, Ryan M. (Division of Social Sciences , College of Arts and Sciences, University of the Philippines Visayas, 2008-10)This study sought to study the following: 1) the consumption of listeners from the two groups of respondents from the urban community which is Iloilo City Proper vis a vis the rural community of Miagao, and 2) the way the listeners perceive such radio drama whether as something which convey issues in the society or as something which is purely entertaining. The researchers used two major steps in data gathering: survey and indepth interviews. One hundred respondents who were listeners of such drama participated, half of which came from both groups of respondents who were Iloilo City Proper-based and Miagao-based. The survey revealed that Iloilo City Proper-based respondents have a higher frequency of exposure to such drama compared Miagao-based respondents. It was also revealed that majority of the respondents from each group of respondents perceived Toyang Ermitanya as entertaining however, majority also claimed that they were also learning lessons and insights from it. Moreover, with the results and data collected and analyzed, the research itself revealed three prevailing forms in the consumption of such radio drama by both groups of listeners. First, Toyang Ermitanya as a medium for emotional release. Second, as a form of enjoyment. And third, Toyang Ermitanya as a medium where one could obtain pieces of information and advice from listening to it.Item A survey of the catch composition of fyke nets in the Iloilo riverAndrada, Kristina Abelaine D. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2000-04)A survey of the catch composition of fyke nets in the Iloilo River Estuary during the months of August 1999 and February 2000 show that catches are dominated by Metapenaens crisis and (ilossygobius sp. The 18 species caught are : 9 fish species, 5 shrimp species, and 4 crab species. The index of similarity 0.3 between the monthly samples is low which means that there is minimal degree of similarity between the species composition of the catches. There is no significant difference between the total catch volumes per day for the months of August 1999 and February 2000 which means that the seasons do not affect the volume of the catch.Item Health risks associated with bacteriological quality of bathing waters in Villa Beach, Brgy. Sto. Niño Sur, Arevalo, Iloilo CityAbad, Sue Ellen T.; Catinan, Mary Joy A.; Hautea, Therese Angelie T.; Mabang, Moctar M.; Narida, Leah Joy S.; Panggat, Kevin Matthew B.; Turija, Maisie Mae L. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-04)ABSTRACT A special problem submitted to Division of Biological Sciences, College of Arts and Sciences, University of the Philippines in the Visayas, Miagao, Iloilo. The study investigated the bacteriological quality, using E. coli, Salmonella spp., and culturable Vibrios as bacterial indicators, of four selected bathing waters in Villa Beach, Brgy. Sto. Nino Sur, Arevalo, Iloilo City, as well as the incidence of symptom occurrence associated with these microbes among 33 respondents. This was to determine health risks associated with bacteriological quality of bathing waters in Villa Beach. Conventional and modified laboratory procedures were used in the detection of E. coli, Salmonella spp., and culturable Vibrios, while pre-structured interview schedule was utilized in the epidemiological survey. p-value was used as statistical tool to measure association. All four water samples tested positive for E. coli and culturable Vibrios. Salmonella spp. was negative in all of the water samples. The MPN for E. coli in water sample C was 460 per 100 ml water sample, while in water samples A, B and D it was 240. Obtained MPN were above the DENR MPN standard for fecal coliform for Class SB, which is only 200. There were 52 individual participated in the study but only 33 (63 %) were able to complete the follow up interview done seven days after the actual date of survey. 18 (55 %) of the respondents were females. The mean (SD) age was 19.3 (14.5) years with an age range of 3-56 years. 11 (34 %) respondents came from sampling site C and 32 (97 %) were visitor-swimmers. Only 13 (39 %) of the respondents reported to have experienced symptoms during the follow up, and the most common symptoms reported by 10 (77 %) of the symptomatic respondents were upper respiratory tract symptoms such as colds, cough and sore throat. Among the symptomatic respondents, only four (31 %) were classified as cases. Significant differences were observed only in the case of symptom occurrence relative to MPN and sampling site as indicated by p-values (0.0004 and 0.003, respectively) less than 0.05. The presence of E. coli in significant concentration and culturable Vibrios in all of the four water samples indicated poor bathing water quality of Villa Beach which may pose health risks among swimmers. The incidence of symptom occurrence or health risks was positive as reported by some of the respondents in the follow up survey. Positive relationship was observed only in the case of symptom occurrence with variables sampling site and MPN for E. coli. Symptom occurrence was found out to be more likely relative to the sampling site, and that it increases with E. coli concentration present in water samples.Item Bacteriological analysis of seawater from San Salvador to Belen bay areas in Banate Bay, Banate, IloiloAbancio, Celyn Ann L. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines in Visayas, 2000-04)This study was conducted at Banate bay, Banate, Iloilo from a point from Belen to San Salvador. Two samplings were taken one week apart and was analyzed for the Most Probable Number (MPN) per ml coliform count The Multiple fermentation tube technique showed that in Poblacion approximately 100 meters from the shore had the lowest MPN values for both samplings which was >3 MPN per ml. The highest count of greater than or equal to 2400 MPN per ml was obtained in sites Belen-10, Belen-50, and Bularan-10 meters away from the shore. As the distance from the shore increases, the MPN values usually decreases, showing that the area near the shore would exhibit high coliform counts than the are further away from the shore. The tide and the weather may have affected the coliform counts because of the differences of MPN values.