Undergraduate Theses
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Item Antidiarrheal activity of Pterocarpus indicus bark extracts using castor oil-induced diarrhea model on miceCabatea, Norberto C. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2010-04)This study evaluated the antidiarrheal activity of the bark of Pterocarpus indicus (Narra). The crude methanolic extract of the bark was subjected to sequential extraction using hexane, DCM, and ethyl acetate. These extracts were tested for antidiarrheal activity in vitro using the castor oil induced diarrhea model in mice employing charcoal tracing method. Thin Layer Chromatography (TLC) was used in determining the chemical constituents present in every extracts using spraying reagents to aid in the visualization of spots. Crude methanolic extract dosage 200 mg/kg body weight is the comparable dosage to the reference drug loperamide (2 mg/kg body weight). The hexane extract was the most active fraction and 200 mg/kg dosage was more effective than with the positive control loperamide (2 mg/kg). No antidiarrheal activity found in the fraction of DCM and ethyl acetate extracts. Phytochemical screening revealed positive tests for tannins, phenolics, terpenes, cardiac glycosides, saponins and reducing sugars in all fractions. Tests for flavonoids and alkaloids, however, were negative.Item Print media exposure and the attitude of graduating mass and broadcast communication students toward classified adsCabanilla, Richelle T. (Division of Humanities, College of Arts and Sciences, University of the Philippines Visayas, 1988-02)Hypothetically, frequency of exposure to an object or idea affects one’s attitude toward it. Such premise was used for this particular study. An attempt is made to determine if any relationship exists between exposure to print media, specifically to newspapers, and attitude toward the classified ads. Totalling 67 in all, graduating Mass and Broadcast Communication students of School Year 1986-87 in Iloilo City, were made as respondents. A set of questionnaires were handed out to them and the line of inquiry covered the areas from frequency of newspaper reading to behavioral inclinations or action tendencies toward the classified ads. Aside from trying to determine the frequency of exposure and what the respondents think of the ads, the questionnaire was also designed to deal with the three components of attitude: the cognitive, affective and the behavioral. One concept about the nature of attitude is taken from the Latent Process Viewpoint which incidentally is used as a guide in this study. The viewpoint surmises that attitude is a hidden mental or neural process which takes place in the individual. As such, one limitation in the study of attitude is that it is not directly observable. Inferences about one’s attitude can only be based from the study of overt behavioral responses. Theoretically, exposure is considered as the independent variable and attitude as the dependent variable. In actuality however, attitude is more of an intervening variable because the study focuses on the stimulus-response set-up with "attitude" seen as a possible explanation for the causation of response or responses to the stimulus. Based on the data gathered, the respondents are in general, favorably disposed toward the classified ads. The positive attitude is connected somehow with the respondents' belief that the classified section is primarily informative and entertaining at the same time. To prove or disprove the hypothesis, a contingency table was constructed for the computation of the chi-square. The table included the respondents’ frequency of newspaperreading and whether they like or dislike the ads. The computation of the chi-square nullifies the hypothesis that students who like and dislike the classified ads differ in their frequency of reading the newspapers. Similarly, based on the data gathered, a couple of hypotheses were formulated. One, students who have a favorable and unfavorable descriptions of the classified ads differ in belief on the ads’ capacity to provide for their purposes or motives in reading them. Two, students who have and don’t have any action tendencies toward the classified ads differ in their belief on possible gains which can be derived from them. The study of attitude per se is complex thus further researches are recommended.Item In vitro antibacterial activity of Hibiscus rosa sinensis leaf extracts against some pathogens associated with urinary tract infectionsCabayao, Coney B. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2011-04)The in vitro antibacterial activity of Hibiscus rosa sinensis leaf ( methanolic, dichloromethane, ethyl acetate, n-hexane, and aqueous ) extracts were studied against Gram-negative (Escherichia coli and Pseudomonas aeruginosa ) and Gram-positive ( Streptococcus faecalis) bacteria. The methanolic extract was subjected to sequential liquid-liquid extraction using solvents of varying polarity and concentrations. Out of the 5 extracts, methanolic and dichloromethane extracts exhibited the highest antibacterial activity as measured using the zone of inhibition. This was followed by ethyl acetate and n-hexane extracts. At 200 mg/ml concentration, all extracts were considered active when tested with E. coli and S. faecalis, and were partially active against P. aeruginosa. The aqueous extract was inactive towards the three bacteria. The 200 mg/ml concentration showed no significant difference when compared with the positive control, amoxicillin (12.51μg/ml). This shows that Hibiscus rosa sinensis exhibits a promising antibacterial activity. Phytochemical analysis of the active fraction- the methanolic extract- showed the presence of alkaloids, tannins, glycosides, saponins, steroids, flavonoids, terpenoids, and anthraquinones. These bioactive components could be responsible for the antibacterial activity of Hibiscus rosa sinensis leaf extracts.Item The pharmacological screening of Moringa oleifera Lam.Burgos, Karen J. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1998-07)Moringa oleifera, Lam, or malunggay, belongs to Family Moringaceae. The medicinal value of this plant has long been recognized in folk medicine. Not all the claims, however, are proven scientifically. This study aimed to (1) test the crude extracts from the seeds and leaves of M. oleifera for pharmacological properties and (2) to compare its efficacy with the drugs commonly used to alleviate particular ailment. Phytochemical assay for alkaloid using Culvenor-Fitzgerald method was done to test the presence of alkaloids. The dried seeds and young leaves were extracted with methanol and concentrated under reduced pressure at 45°C. The resulting extracts were partitioned and used for the different assays: Brine shrimp assay for cytotoxicity, Acetic acid-induced writhing assay for analgesic activity, Charcoal tracing assay for antispasmodic activity and paper disc diffusion method for antimicrobial activity. Result showed that only the seeds have alkaloids. Toxicity test revealed that the seeds are practically non-toxic but the leaves were toxic with an LC50 of 550 μg/mL after 24 hours of exposure. Of the two extracts, only the leaves exhibited analgesic activity although not as effective as Mefenamic Acid in reducing pain. The leaf extract, was also found active against Bacillus subtilis, Staphylococcus aureus , Escherichia coli,and Pseudomonas aeruginosa. The seed extract was active only against B. subtilis. Both extracts, however, are not as effective as the antibiotic drug, Amoxicillin. Results also showed that both extracts do not have antispasmodic activity. The study confirmed the antimicrobial and analgesic activities for the use of the leaves of this plant in folk medicine.Item A preliminary study on the freezing tolerance of milkfish (Chanos chanos, Forskal) embryosBuendia, Jeremiah C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1994-03)Milkfish embryos of blastula and C-shaped stages were tested for cryoprotectant toxicity using DMSO and glycerol at 10%, 12% and 15% concentrations. Survival and hatching as well as the effects of freezing were observed. Glycerol was more toxic than DMSO. Freezing at 4°C resulted in the decrease of hatching, and ice crystal formation killed the embryos during the process of freezing to -80°C. C-shaped embryos had a higher survival and hatching than the blastula stage embryos in the toxicity and cold shock tests.Item The uses and gratifications of reading fan fiction among Ilongga teensBuenaflor, Daphne Claire; Haro, Samantha Gabrielle; Rojas, Jerlyn Joy (Division of Humanities, College of Arts and Sciences, University of the Philippines Visayas, 2017-05)Fan fiction has become quite the internet trend especially among female teens that the researchers sought to find out why readers read fan fiction and what underlying needs of the readers are gratified by fan fiction. Fan fiction is all about fictional stories written by fans on real celebrities that are either published or posted online. The study is based on Katz and Blumler’s Uses and Gratifications theory, which explains the uses and functions of the media for individuals, be it of groups, and society in general. It is a survey done on to 350 female students at the Iloilo National High School (INHS) using descriptive statistics as its method of analysis. Findings reveal that Wattpad is the most used platform in accessing fan fiction and the most read stories are under Romance. The results also show the primary use for the respondents as to why they read fan fiction is stimulation or to develop their creativity and spark their imagination. Moreover, the gratifications acquired by the readers, which are cognitive or acquiring knowledge, information, and comprehensions are parallel to why they read fan fiction in the first place. The lowest rated use is socialization and the lowest rated gratification is social integrative which are also parallel to each other Reading fan fiction for the respondents, allows them to be more motivated and to be more inventive. Although, fan fiction does not necessarily help in improving the social lives of the readers.Item Antifungal activities of alginate films incorporated with lemon grass (Cymbopogon citratus) essential oil on sliced breadBronzal, Lucile A. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)The accumulation of non-degradable and non-recyclable waste materials leads researches to venture on biopolymer films which have been regarded as the promising green substitutes of non-biodegradable plastic materials. However, food products can be subjected to contamination by bacteria and fungi. The addition of plant derived essential oil can control microbial contamination of foods by reducing the growth rate of target microorganisms or by inactivating microorganisms by direct or indirect contact. Incorporating antimicrobial compounds into films provides a different way to improve the safety of ready-to-eat foods. In this study, the efficiency of synthesized alginate films incorporated with lemon grass essential oil (LGEO) for antifungal activity on white bread was evaluated. Two sets of film were prepared the (1) LGEO - Ethanol incorporated films and (2) LGEO — β-cyclodextrin inclusion complex films via solution casting method. Furthermore, the FTIR analysis of the generated films was also assessed to identify the functional groups present in the film that facilitates its antifungal property. Experimental results showed that LGEO enhanced the antifungal properties in the films and significantly slowed down the propagation of fungi on white sliced bread. After two weeks of storage, all bread samples packed with various film samples showed fungal growth. It was found out that citral is the main component of essential oil which contributes to the inhibition of fungal growth. The incorporation of LGEO in the film decreased the O-H peak absorbance while the inclusion complex in the film increases the O-H peak absorbance and broad O-H peaks were also obtained.Item Physicochemical characterization and FTIR Analysis of the essential oil from Almaciga (Agathis philippinensis Warb) gumBriones, Kathleen Faith C. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2016-02)Almaciga (Agathis philippinensis ) is one of the few conifer timber species endemic to the Philippines. It is highly valued for its resin which is the world- renowned Manila copal (hard resin). Manila copal have been reportedly employed in treating asthma, headaches, myalgia and even arthritis. An ethnomedical documentation of Manila copal usage also reported the utilization of the resin for stomachache, ulcers and dysentery. However, there is only limited literature regarding the Almaciga gum (the softer resin). To provide supplemental data regarding the Almaciga gum, this study was conducted to characterize the physicochemical properties and to identify the major functional groups of the essential oil extracted from its resin. The essential oil was extracted using a makeshift steam distillation set- up with a total yield of 3.20%. The essential oil was found to have a refractive index of 1.4731± 0.0002, a density of 0.8502±0.0039 g/mL, and a specific gravity of 0.8527±0.0039. Odor, color and appearance were evaluated using the organoleptic method. Major functional groups were identified from Fourier Transform - Infrared Spectroscopy (FTIR) which suggested that limonene is the major component.Item A discourse on RPG metanoia using a structural analysis and sociocultural approachBriones, John Nathaniel B. (Division of Humanities, College of Arts and Sciences, University of the Philippines Visayas, 2014-03-17)This paper is a study on RPG Metanoia, a Filipino computer generated film released in December 2010. The film features a hero and his adventures in real life and as a player of the Massively Multiplayer Online Role Playing Game Metanoia. This thesis will be studying RPG Metanoia for the sake of adding academic knowledge regarding computer games themed media and pop culture in literature. Using analysis by Vladimir Propp RPG Metanoia will be subject to formalist structuralism in order to analyze the literary structure of the film. A study by Catherine Gallagher and Stephen Greenblatt will supplement the thesis in order to address structuralism’s limitations and to give this analysis more depth via a socio-cultural approach. Objectives include the intent for analyzing the film via structuralism, comparing the film to related games and media, and studying the film via a socio-cultural perspective. Findings include the successful dissection of the film and proper categorization of each scenario to Propp’s analysis’ functions. Also, New Historicism provides facts supporting the significance of the film as a reflective piece of literature on a particular prevailing attitude Filipinos towards games. Finally, the study also provides a brief comparison and analysis of the games related to RPG Metanoia and reveals the inspiration and motivations behinds the conceptualization of the film. The conclusion confirms RPG Metanoia as a legitimate literary narrative as well as label it as falling under the category of literature structurally similar to folk tales. It also highlights several points regarding the importance of the film as a literary fantasy referencing to the effects of games and technology on the Philippines’ youth and culture.Item Media preferences of local advertisers in Iloilo CityBonifacio, Nuevelar; Kawaguche, Gretchen (Division of Humanities, College of Arts and Sciences, University of the Philippines Visayas, 2006-10)This Broadcast Research is entitled "Media Preferences of Local Advertisers in Iloilo City. " The objectives of this study are to identify the local advertisers in Iloilo City, to categorize local advertisers, to determine the type of medium used in advertising a product, to differentiate the characteristics of each medium in advertising a product, and to find out the reasons why businessmen advertise a product. The study has 20 respondents. The researchers categorized the different businesses into four such as food, health, general services and housing utilities. The researchers gather the data through survey. Based on the results of the survey, it shows that businessmen in every category have different media preferences. The data shows that in food and health category, the most preferred medium was newspaper. In general services category, radio was the most preferred medium. However, in housing utilities category, radio and tri-media was the most preferred medium by the advertisers. Moreover, the respondents identified reasons why they advertise. It to was found bring out that businessmen engaged in advertising to bring new products to the attention of the consumers to buy or accept a product. Next, they advertise to maintain and defend markets for established brands, followed by helping potential customers choose among competing brands. And the last reason was to increase the use of goods and services among customers.