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Undergraduate Theses

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    Preparation and characterization of chitin-humic acid hybrid and chitin-humic acid hybrid hydrogel as absorbent for Cu(II)
    Balgos, Blyth Angela C. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2017-06)
    Gelatinous chitin was functionalized with humic acid to produce a chitinhumic acid hybrid. The gelatinous chitin was protonated using HC1 and humic acid was deprotonated by using NaOH in separate containers. The protonated gelatinous chitin and the deprotonated humic acid were then mixed to form Hie chitin-humic acid hybrid. A portion of the chitin-humic acid hybrid was used to prepare the chitin-humic acid hydrogel. The chitin-humic acid hybrid hydrogel was then prepared using 1,2,3,4- butanetetracarboxylic dianhydride(BTCA) as crosslinker. The chitin-humic acid hybrid hydrogel was then characterized using FT-IR and swelling test. The degree of swelling of the chitin-humic acid hydrogel was found to be 38.10 ± 3.06. It can also be inferred from the results of the swelling test that the chitin-humic acid hybrid hydrogel has a low crosslink density. Characterization by FT-IR suggested successful immobilization for the hybrid and BTCA crosslinking for the hydrogel. The potential of chitin-humic acid hybrid and chitin-humic acid hybrid hydrogel to adsorb Cu(II) in a solution was then evaluated. The process was done by subjecting the chitin-humic acid hybrid to Cu(II) adsorption. The results for Cu(II) adsorption test was subjected to a Shapiro- Wilk test for normality and was determined to have normally distributed data. One- sample T-test was then used to compare the adsorption capacity of the hybrid and hydrogel. The mean % Cu(II) Removal of the chitin-humic acid hybrid and chitinhumic acid hybrid hydrogel were 41.36 ± 2.35% and 51.21 ± 1.32%, respectively. Results suggested that the chitin-humic acid hybrid hydrogel has significantly higher % Cu(II) Removal compared to the chitin-humic acid hybrid
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    A novel water-in-oil-in-water emulsion to encapsulate antibacterial agents
    Balcarcel, Angelica V. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)
    Encapsulating bioactive compounds can protect them from adverse conditions. This study aimed to encapsulate bioactive agents in a stable multiple emulsion system using a material that can be recovered easily from a product abundant here in the country. Results of the study revealed that the method of encapsulation used is effective in encapsulating and releasing the bioactive compound encapsulated. The antibacterial activity determination showed that encapsulated chlorhexidine is effective against both S. aureus and E. coli bacteria. Further investigation was made by encapsulating aqueous guava (Psidium guajava) extract in the same emulsion system (water-in-oil- in-water) using recovered coconut milk protein (CMP) as a gelling agent. The evaluation of the stability of the emulsions revealed that the treatment with 40% guava extract in the aqueous phase of its primary emulsion (Emulsion 3) is the most stable among the other treatments. This treatment showed the smallest droplet size range and most uniformed droplet sizes. The creaming index of this treatment also showed the lowest values after three (3) weeks of storage. On the other hand, the treatment with 60% guava extract in the aqueous phase of its primary emulsion (Emulsion 4) appeared to be the most stable against heating. However, no antibacterial activity was observed for any of the emulsion systems both S. aureus and E. coli bacteria. Additional test revealed that the bioactive compound present in the plant extract was disrupted by the sonication process
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    They called me a slut: The process of shaming and its influence on the self-concept and sexual reputation of teenage girls
    Bahinting, Grace Katrina F. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2017-06)
    This phenomenological study explored women’s slut-shaming experiences in school, how they managed the ‘slut’ label and how the label influenced their selfconcept and sexual reputation. Three college students from Bacolod City, Negros Occidental were interviewed for this project. The participants aged 18-23 years have experienced slut-shaming incidents in school. The methodology for this study consisted of conducting in-depth interviews exploring the slut-shaming experiences of the participants and Rosenberg’s Self-Esteem Scale to measure the participants’ current self-esteem. The data gathered on the experiences encountered by slut-shamed girls were recorded, transcribed and analyzed using the Bedevilment and Labeling Process by John Curra (1994). The results of the study showed that factors which led to slut-shaming includes individual characteristics, flirting style and sexual activity. Two forms of slut-shaming experiences in school emerged from the data gathered: being gossiped and ostracism. Furthermore, the label management of the participants which includes embracing, ignoring and moving away from the label, were influenced by the degree of importance of the labellers and the girls' own perception of a slut. The data showed that the shamed individuals had positive and negative self-concept after shaming and was seen as someone who was sexually dirty. In conclusion, the influence of shaming to the girls’ self-concept varies depending on how the shamed individual manages the slut label.
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    Experiences of LGBT individuals with Christian upbringing
    Baguyo, Alec Jonavie A. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2023-06)
    Christianity is one of the religions worldwide that promote heteronormativity, following their belief that it is “normal.” In the Philippines, wherein Roman Catholicism is the main religion, heterosexuality is the norm, and people who do not follow this feel a sense of conflict in terms of their religious and spiritual identity and their LGBT identity. This study explored the experiences of LGBT individuals with a Christian upbringing in the Western Visayas. A qualitative approach was employed and six participants were selected for an in-depth interview, the collected data was then analyzed using a thematic analysis wherein four themes emerged, growing up with a Christian upbringing, navigating through the experiences of being an LGBT and a Christian, perceived outcomes of the actions that LGBT individuals employed, and feelings elicited by the outcomes, which tells us the unique experiences of LGBT Christians.
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    Living conditions of students and their families in the midst of Covid-19 pandemic: Case of students from University of Antique
    Alagos, Krizyl Anne J.; Castillo, Justine Mae T. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2022-07)
    The coronavirus (COVID-19) disease has caused serious and long-term implications for people’s health, quality of life, and well-being. Apart from the hostility of the pandemic to the worldwide economy, the crisis has also made a significant impact on the education system, specifically on the students. The disturbance has shifted from traditional learning of students to a virtual class experience through online set up or remote learning. This study assesses the living conditions of randomly selected students of the College of Arts and Sciences, University of Antique and their families amid the COVID-19 pandemic. Primary data were gathered through the use of an online survey on Google Forms, wherein respondents were selected using stratified random sampling. The data were analyzed using descriptive statistics and paired T- test. The findings of the study revealed that students experienced worsened conditions due to the pandemic. The results further showed that the students and their families were negatively affected by the pandemic after six months of the pandemic through several variables such as employment status, job satisfaction, number of people working in the household, household income, household expenses, performance as a student and performance as a son/daughter. The gradually improving situation of the UA students and their families after two years of the pandemic showed that they are on their way to recovery. Yet, the results also showed that they are yet to fully recover. The paper recommends interventions, policy workshops, and evidence-based programs to help students and their families recover from the effects of the pandemic and become better prepared for any similar future crises
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    Perceived body image of female college students
    Almonte, Darby April Gaye Q.; Tinsay, Shiela Mae B. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2003-03)
    The study aims to describe the perceived body image of female college students. Specifically, it wants to find out the activities of female college students relative to their body image; their exposure to the mass media in terms of enhancing body image; and to find out the influence of mass media exposure to their perceived body image. The study was conducted in the College of Arts and Sciences, University of the Philippines in the Visayas, Miag-ao, Iloilo. Sixty respondents were obtained from the population of Social Sciences students using the fishbowl method of simple random sampling. The Body Parts Satisfaction Scale (Spainhour, 2000), together with a set of questions developed by the researchers, were used in gathering the data. Generally, the results showed that the female college students have a positive perception of their body image. Also, the female college students do not engage in any activity related to body image, such as dieting and exercising. Lastly, they are well exposed to the mass mediated messages about body image in the television and the magazine but they are not negatively influenced by those messages, that is, they neither compare their bodies with nor do they want to look like the models in television and magazine.
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    Television viewing patterns of children in a rural community
    Allones, 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.
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    Phytochemical, antioxidant, and antibacterial analysis of essential oils from Zingiber officinale Roscoe(Ginger) and Curcuma long Linn.(Turmeric)
    Alviar, Joseph Noel G. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2015-06)
    This study was conducted to characterize and compare the phytochemistry, antibacterial and antioxidant activities of essential oils extracted from the rhizomes of Zingiber officinale Roscoe (ginger) and Curcuma longa Linn. (turmeric). Percent yields in the steam distillation of ginger and turmeric were 0.42±0.02% and 0.43± 0.02%, respectively. Qualitative phytochemical screening showed that both essential oils are positive for flavonoids, phenols, saponins, terpenoids, tannins, and quinones. Antibacterial activity was tested against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli using 100%, 75%, 50%, and 25% (v/v) essential oil in ethanol with positive control tetracycline and negative control ethanol. It was determined that C. longa did not have antibacterial activity against both bacteria while Z. officinale had “moderately inhibitory” to “strongly inhibitory” activity against S. aureus with zone of inhibition (ZOI) from 17.67±1.53 mm to 23.67±0.58 mm and “weakly inhibitory” to “moderately inhibitory” activity against E. coli (ZOI from 12.33±1.15 mm to 15.67±2.08 mm). The standard antibiotic tetracycline also showed “moderately inhibitory” activity against both S. aureus (ZOl = 19.00±0.89 mm) and E. coli (ZOI = 17.33±1.21 mm). Antioxidant activity was determined by DPPH free radical inhibition. Highest % DPPH free radical inhibition was exhibited by the standard antioxidant ascorbic acid (92.98%), followed by C. longa essential oil (88.74%), and Z. officinale (76.30%).
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    Effect of positive mood on the children's impression-formation judgement
    Agrazada, Divine Grace (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1996-04)
    The study was conducted to determine if positive mood enables children to form positive judgments rather than negative judgments. The study was based on a two—randomized group design. Experimental group was induced in a positive mood and the control group was manipulated with a neutral mood. Neutral mood was also induced to a group of participants to provide a control condition for aid in interpretation of the results. The researcher induced mood through film showing. This method appeared to be the most suitable mood—manipulation technique in the present circumstances. With children , In particular as subjects, videotaped films represent a most suitable and familiar medium for influencing mood. After mood manipulation was completed, the subjects were shown pictures of different persons. These persons served as stimulus characters. Each of the stimulus characters was rated on a IO—centimeter scale as being more closely related to one or the other pair of opposite traits. Thus, participants were asked to write a small vertical line on the 10—centimeter scale to indicate their rating. Results did not show enough evidence for the researcher to conclude that a significant difference in impression—formation judgment will come differentially from positive mood and neutral mood. Based on the findings, children with positive mood and neutral mood both have positive judgments rather than negative judgments. Therefore the researcher concludes that transient mood has no pronounced effect on impression—formation judgment on this study .
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    Antibacterial activity, antioxidant property and photochemical analysis of crude ethanolic extract from Dalanghita (Citrus nobilis) peels
    Aglobo, 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.