UPV Theses and Dissertations
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Item Community structure of mangroves in selected barangays in Sebaste, AntiqueAlorro, Mary Juandin Grace F. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)Mangroves are higher plants that are primarily found predominantly in the intertidal areas such as estuaries and lagoons of the tropical and subtropical shorelines. This study was conducted to assess the community structure of mangroves in Barangay Callan, Barangay Idio, Barangay Poblacion, Barangay Abiera, and Barangay Bacalan, Sebaste, Antique, using the transect line method. Specifically, it aimed to determine selected physical and chemical factors such as salinity, pH, temperature for water and soil as well as characterization of the substrate; identify and classify true mangrove species present in the area; and describe the community structure in terms of stand basal area, stems per hectare, relative density, relative frequency, relative dominance, importance value, Shannon index of diversity, zonation patterns, seedling and sapling density. No study has been done to document the community structure of mangroves in Sebaste, Antique thus, this study was done to provide vital information needed for its proper management. Three stations were selected in Sebaste, Antique. Four (4) species of true mangroves were identified, belonging to three (3) families: Palmae - Nypa fruticans; Rhizophoraceae - Rhizophora apiculata, Bruguiera gymnorrhiza; and Euphorbiaceae - Excoecaria agallocha. The study area had a water salinity range of 0.6 ppt to 15.3 ppt; water temperature range of 28.3°C to 35.4°C; water pH range of 7.1 to 7.7; soil temperature range of 28.3°C to 34.7°C; and soil pH range of 6.5 to 7.2. Basal area ranges from 3.16 m2/ha (Rhizophora apiculata) to 5.88 m2/ha (Excoecaria agallochd) to 8.19 m2/ha (Bruguiera gymnorrhiza) . The species with the highest average of stems per hectare were Excoecaria agallocha and Bruguiera gymnorrhiza with 300 as well as the highest average density value of 100 for Excoecaria agallocha. Nypa fruticans had the highest relative frequency and relative dominance. Among the four species, the most important species was Nypa fruticans. The Shannon Index of Dominance was 0.403 which was quite low in terms of diversity as influenced by the dominance of Nypa fruticans.Item Television viewing patterns of children in a rural communityAllones, Christine Marie G; Montalvo, Nica M. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)The general objective of the study is to find out if there is a relationship between TV viewing patterns of children in a rural community and the socio-demographic characteristics such as age, sex, and the parents’ educational attainment. Specifically, it aims to (1) describe the socio-demographic profile of the respondents; (2) determine if there is a relationship between children’s age and their TV viewing pattern; (3) determine if there is a relationship between children’s sex and their TV viewing pattern; (4) determine if there is a relationship between parents’ educational attainment and TV viewing pattern. The data analyzed in this study are obtained through conducting guided interviews with 80 children. The areas included by the researchers in the study are the hours and days of TV viewing of children, their program preferences, their sleeping time, and the frequency of scolding of the parents. It was found that majority of the respondents are 10-12 years olds, males, and have parents who have both high educational attainments. Results reveal that majority of respondents spend between one to five hours watching television everyday. Their usual sleeping time is before or at nine in the evening. Nonetheless, many are scolded for watching television on weekdays but never on weekends. The results of the study concluded that there is a significant relationship between sex and hours of television viewing while age and parent’s educational attainment have no significant relationship in the hours of television viewing. There is no apparent difference between the number of hours of television viewing and the age and parent’s educational attainment. The only difference is that majority of male children watch television for one to five hours a day, while most female children watch more than five hours of TV viewing. Thus, there is a significant relationship between sex and hours of television viewing. On the other hand, there is no significant relationship between the days of TV viewing and the socio-demographic characteristics of the respondents. The researchers recommended that a similar study could be conducted in an urban area, covering a bigger sample size, and using other set of variables that can affect the TV viewing patterns of children. Other researchers are also encouraged to explore the field since there are not so many studies about them in the country.Item Living above and belowground biomass and carbon stock assessment of station 1, Taklong Island, Taklong Island National Marine Reserve, Guimaras, PhilippinesAlegado, Alexis Jude T. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)The Taklong National Marine Reserve is one of the marine protected sites in the country with a good cover of mangroves. This study assessed the species composition, diversity, aboveground biomass and the estimated carbon of the natural mangrove forest found in Taklong Island Station 1. Barangay Lapaz. Nueva Valencia. Guimaras. The study aimed to: a.) map out the area of the selected mangrove patches, b.) identify the species composition and diversity of the sampling site, c.) quantify the aboveground and belowground biomass, carbon stock of live vegetations, and d.) to convert the carbon stock to carbon dioxide equivalence (CO₂e) of the selected station. This study is only limited to the estimation of living aboveground, belowground and the carbon stock using the published allometric equations. Only 7 species of mangroves were found in the site belonging to 3 families. The mean stand basal area was 21.47 m2 ha-1. The species diversity is low at 0.23 due to low speciation of species of mangroves on the site. The total aboveground biomass was 506.89 Mg ha-1 and carbon dioxide emission potential (CO₂e) of 2,498.15Mg CO₂e. This shows that mangrove in Station 1 of Taklong Island has stored a considerable amount of carbon overtime. Hence, there must be a proper management and protection of this ecosystem.Item Anti-inflammatory and antibacterial activities of Batuan (Garcinia binucao) fruitsAlbano, Zella Faye (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2010)In this study, fresh fruits of batuan (Garcinia binucao) was evaluated for its antiinflammatory and antibacterial activities. The anti-inflammatory assay using Carrageenan-Induced Paw Edema Method showed that n-hexane extracts (65.79%) and dichloromethane extracts (64.91%) exhibited anti-inflammatory activities comparable to Indomethacin, the positive control (67.11%). The antibacterial assay using Paper Disk Diffusion Method showed that crude methanolic extracts, n-hexane extracts and dichloromethane extracts at 1000pg/mL were most effective against Staphylococcus aureus. The microbial indexes were 0.39, 0.47 and 0.50 respectively. The positive control, Amoxicillin has a 3.39 microbial index. The components of the three most active extracts (crude methanolic, n-hexane and DCM extracts) from both assays were separated through Thin Layer Chromatography and subjected to phytochemical tests. Crude methanolic extracts contained alkaloids, phenolic compounds and cardiac glycosides. Both n-hexane and DCM extracts contained terpenes, alkaloids, saponins, phenolic compounds and cardiac glycosides. These bioactive compounds present may have been responsible for the antiinflammatory and antibacterial activities of the extracts.Item Prevalence of substance use among college students of state colleges in IloiloAgreda, Joji Marie Gela; Corio, Razel Joy Luceno; Hervas, Jeneline Espanol; Icabandi, Donna Joy Tabor; Melarin, Dianne Vallecera; Mosura, Joenalie Montano; Suspeñe, Rhoda Belandres; Vallejo, Arleen Joy Calanao (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-04)This study aimed to describe the prevalence, nature, and extent of substance use of college students enrolled in the main campuses of state colleges in Iloilo. There were 402 respondents coming from the main campuses of Iloilo State College of Fisheries (ISCOF), Northern Iloilo Polytechnic State College (NIPSC), Western Visayas College of Science and Technology (WVCST) and the lone campus of New Lucena Polytechnic College (NLPC). Data was collected through a questionnaire which was modified from the model core questionnaire developed by the World Health Organization (WHO). Results showed that 36.1% of the respondents had tried smoking. Their mean age of smoking initiation was 17 years with 13.5% having first tried smoking before 15 years of age. Their top three reasons for smoking are as follows: curiosity (44.1%), for fun (25.5%) and peer pressure (17.2%). Of the respondents who smoked within 30 days prior to the survey, 14.7% consumed more than 5 cigarettes per day. The results also showed that 33.8% of the respondents who have tried smoking usually smoke during parties while their usual place to smoke is either in their houses, dormitories or boarding houses (40.7%). There was a significant relationship between the smoking status of the respondents who have tried smoking and the following: gender (p < 0.0001), age (p = 0.0004) and year level (p < 0.01). On the other hand, smoking status of the respondents who have tried smoking has no significant relationship with the following: annual family income (p = 0.91). living arrangement (p = 0.63) and membership in fraternities/sororities (p = 0.17). Alcoholic use had a higher prevalence (65.4%) than cigarette smoking (36.1%). The mean age of those respondents who have tried drinking was also 17 years with 13.7% having tried drinking at an age below 15 years. Their top three reasons for drinking are: for fun (34.6%), curiosity (29.3%) and because family members drink (12.9%). Seventy percent of the respondents who have tried drinking drank 30 days prior to the survey with 10.9% consuming more than 5 bottles and another 10.9% consuming more than 5 glasses of alcoholic beverages. Of those who have been binge drinking 30 davs prior to the survey, 18.9% have been binge drinking 3 to 5 times. The usual occasion for the respondents to drink is during parties (72.9%) and the usual place for them to drink was either in their houses, dormitories or boarding houses (60.8%). The beverage of choice is beer (59.7%). The drinking status of those who have tried drinking had a significant relationship with the following: gender (p < 0.0001), year level (p = 0.005) and membership to fraternities/sororities (p = 0.04). Meanwhile, drinking status had no significant relationship with age (p = 0.06), annual family income (p = 0.85) and their living arrangements (p = 0.51). Shabu use had a prevalence of 2.7% among the respondents. The mean age of shabu use was also 17 years with 18.2% first trying it at 15 years of age. Their reasons for having tried shabu are: peer pressure (45.5%), curiosity (18.2%) and for fun (18.2%). Within 30 days prior to the survey. 45.5% of those who have tried using shabu have used shabu and 20.0% have used shabu in 20 or more days. They usually use shabu during parties (54.5%) and usually have tried using shabu either in their houses, dormitories and boarding houses (54.6%). Data shows that shabu use had a significant relationship with the following: gender (p = 0.0007). year level (p = 0.003) and fraternity/sorority membership (p = 0.05). It has no significant relationship with age (p = 0.09). annual family income (p = 0.92) and their living arrangements (p = 0.47). Results also showed that 5 % of the respondents have tried smoking marijuana and 4.2% have tried opiate type drugs. The mean age for having tried drugs other than shabu was also 17 years with 26.3 % having tried them at an age below 15. Thirty-one percent of those who have tried other drugs than shabu have tried within 30 days prior to the survey.Item A preliminary study on the extraction of alginic acid from three species of brown algae: Sargassum polycystum, Sargassum cristaefolium and Turbinaria sp. in Taklong Is.,GuimarasAdelantar, Geoffrey V. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1996-04)Three species of brown algae were harvested in Taklong Is., Guimaras. These were Sargassum polycystum, Sargassum cristaefolium, and Turbinaria sp. These brown algae were subjected to physical and chemical treatment to extract and compare the amount of their alginic acid in the form of sodium alginate. Four seaweed collections for extraction were made between August to December, 1995. Values obtained during the first three extractions gave almost similar results. S. polycystum exhibited the highest percentage yield of sodium alginate with a mean of 22.84%. It was followed by S. cristaefolium at 22.21%. Turbinaria sp. gave the lowest yield with a mean of 14.12%. The last extraction somehow showed a decrease in the percentage yield of all three samples. S. polycystum yielded just 20.00%, S. cristaefolium at 19.00% and Turbinaria sp. at just. 10.10%. Several factors may have contributed to the differences in the amount of alginic acid of the three species of brown algae. Among these are the inherent capability of the different species of brown algae to produce alginates, the thickness and sturdiness of the samples, the viscosity of the extracts, and seasonal changes.Item Antibacterial activity, antioxidant property and photochemical analysis of crude ethanolic extract from Dalanghita (Citrus nobilis) peelsAglobo, Jastine S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-05)The crude ethanolic extract of Dalanghita (Citrus nobilis) was studied for their antibacterial activity, antioxidant and phytochemical properties. The DPPH free radical scavenging assay of extracts with varying concentrations showed strong antioxidant activity with a maximum % inhibition of 92.30 at 80.70 ug/mL concentration. The IC50 was calculated to be 26.26 pg/mL against 12.48 ug/mL for Ascorbic acid, the positive control. The antibacterial activity of the extract was determined against Escherichia coli and Staphylococcus aureus by measuring the mean zones of inhibition using the paper disc diffusion assay at different concentration of crude ethanolic extract. The crude ethanol extract at 100% concentration yielded the highest inhibition for E. coli at 21.50±0.50 mm which is comparable to tetracycline, the positive control. The presence of phytochemicals in the extract were evaluated and the phytochemicals identified were: alkaloids, flavonoids, saponins, steroids, tannins, and terpenes.Item Pesticide exposure, Knowledge, Attitude and Practices (KAP), and laboratory findings of farmers of Barangay San Ambrosio, Igbaras, IloiloAcuesta, Doneza Dee L.; Bernaldo, Alyka Joy D.; De la Pena, Leobert Julienne A.; Diestro, Joan Marie T.; Domingo, Megan Joyce N.; Fortuna, Edward Paul F.; Garrucho, Geraldine F.; Poral, Mechelle Joy L; Suñer, Ma. Alexis Kleanthe D.; Villanueva, Dana Diane C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2014-04)This is a cross-sectional study which aimed to evaluate the knowledge, attitude and practices (KAP) towards pesticide use, its health effects, and the laboratory findings of farmers from Barangay San Ambrosio, Igbaras, Iloilo. Specifically, it aimed to determine the association between the number of years of pesticide use and the farmers’ MCV values. A total of 115 farm workers were interviewed and 109 (94.8%) of them reported pesticide usage. Among farmers who used pesticides, 90 (82.6%) consented to undergo CBC testing. Descriptive statistics was used for socio-demographic profile, KAP, and health effects of pesticide use. Whereas, Chi- square analysis was used to determine the association between pesticide exposure and MCV values. The farmers were knowledgeable about pesticides and its health effects, the route of entry into the body, and the fate of pesticide residues. Despite knowing the adverse effects of pesticides, 107 out of the 109 pesticide-using farmers (98.2 %) still agreed on the use of pesticides, and only 2 (1.8 %) were against it. They justified that pesticides are effective in killing pests to produce abundant crops and only some farmers knew that biological (61.5%) and natural control (63.3%) can be used as alternatives for pest control. In addition, most farmers (n = 94, 86.2%) used PPE when applying pesticides but were inadequate: with 81 (74.3%) using long-sleeved shirts, but only 17 (15.6%) using gloves, and 5 (4.6%) using eyeglasses. The lack of complete and proper PPE may be a factor for the self-reported health effects, such as dizziness (n = 59, 54.1 %), which was the most predominant, followed by burning sensation in eyes/face (n = 54, 49.5 %) and headache (n = 48, 44.0 %). No significant association was found between years of pesticide use and MCV using the chi-square analysis (x2 = 0.583, p = 0.318). It would be useful to minimise the use of pesticides, encourage alternative measures, lessen the time of pesticide spraying, and encourage the use of complete PPE. Prevention and intervention programmes regarding the use of protective measures and monitoring the health status of farm workers should be implemented.Item Partial purification of pH indicator extracted from Rhoeo spathaceaApa, Junna T. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2009-04)pH test papers are still utilized nowadays despite the prevalence of pH meters, because it is more convenient to use in measuring the pH of a certain substance. The use of natural dye as a pH indicator can serve as a good substitute for an expensive commercial dye that most high schools cannot afford. The pH test papers were prepared by impregnation of 0.03% pure dye extracted from Rhoeo spathacea. TLC was performed to partially remove other plant dye components from the pH active ingredient. The color transition chart was then created at pH ranging from 1.0-13.0 at one unit interval using phosphate buffer. The color transition chart of pure dye extract was compared to the color transition chart of crude dye extract at different pH. Paper impregnated with 0.03% partially purified indicator dye extracted from Rhoeo spathacea showed color transitions from pink to red violet at pH 1.0-3.0; red violet to lavender at pH 3.0-4.0; lavender to blue at pH 4.0-7.0; blue to blue green at pH 7.0-8.0; blue green to green at pH 8.0-11.0; green to yellow green at pH 11.0-12.0; and yellow green to yellow at pH 12.0-13.0. Results also showed that the purified dye extract is a better pH indicator in comparison with the crude dye extract. Spectrophotometric determination of pKa of the indicator was unsuccessful due to the strong overlapping of the UV-Vis spectrum of the acidic and basic forms of the plant dye extract. Titration results showed that the plant indicator can serve as a substitute for the methyl red and phenolphthalein indicators for strong acid-strong base and weak acid-strong base titration, but not for weak acid-weak base titration.Item Marketing of milkfish in Iloilo CityDe la Gente, Alice Joan S. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1991)This study describes the marketing practices, costs, net farm price received by the producers, gross margin received by the middlemen and the problems encountered in milkfish marketing in IIoi1o City. Primary data was gathered from 24 producers who were interviewed about their 1ast harvest and 56 midd1emen who were interviewed about their last week's transaction. Of the total volume sold by the producers (30360kg , 86.83% went to the commission men. The highest price, P55/kg, was received by the producers from the institutional buyer, while the lowest price, p38.48/kg, was received from the commission men. The marketing costs received were P5.40/kg and P5.61/kg by the producers who sold locally and in Manila, respectively. The commission men's fee accounted for the largest share of marketing costs of both the producers who sold locally (P2.36/kg) and in Manila (P2.50/kg). The net farm prices received were P35.30/kg and P33.72/kg by producers who sold milkfish locally and in Manila, respectively. The producers whose milkfish were sold in Manila received a lower average price with higher marketing costs. By market function, seven types of middlemen were identified: commission man, buyer-seller, wholesaler, wholesaler-shipper, buyer-seller-retailer, wholesaler-retailer, and retailer. The middlemen sold a total volume of 57070.5kg inside (64.037%) and outside (35.977%) the survey area. The commission men sold the highest volume (34.71%) of milkfish. The wholesaler-retailers received the highest average selling price of P47.75/kg. The wholesaler-shippers had the highest gross margin ( P8.22/k kg) while the wholesaler—retailers who sold outside the survey area had the highest net return ( P3.97/ kg ) The low price of milkfish was the main problem of both producers and middlemen. The milkfish marketing involved many channels, primarily brought about by the presence of too many types of middlemen who practiced intertrading among each other. Thus, there was a duplication of the performance of marketing practices among types of middlemen, which increased the marketing costs and correspondingly raised the prices of milkfish.