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UPV Theses and Dissertations

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Committee Member: search.filters.committeemember.Sabada, Resurreccion B.

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    Occupational exposure to emissions of photocopying machines in Iloilo City: An exploratory study
    Becodo, Cristina M.; Dignadice, Zynie B.; Gaviola, Ma. Thessa Urdolyn M.; Jumares, Analyn G.; Nievales, Cathy Q.; Panizales, Vanessa Grace L.; Teruel, Josie A.; Tingzon, Glynis S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-04)
    Photocopying is a profitable business in Iloilo City. The photocopying machines are known to emit ozone and volatile organic compounds. This study aims to determine whether long-term exposure to photocopying machines will have adverse health effects on the operators. The group extracted blood samples from the respondents; had them undergo chest x-ray examination; answer questionnaires and checklists. From the blood samples, the group determined the WBC count, differential count and serum albumin, total protein and uric acid of the respondents. From the chest x-ray examination, the group aimed to see particles from photocopier emissions deposited in the lungs. From questionnaires, the group aimed to determine the operators’ common health complaints. From the checklists, the group aimed to know if the photocopying establishments have a suitable working space area and ventilation. The group aimed to determine the effect of years and hours of exposure to photocopiers; number of machines; ventilation; working space area; kind and number of toner on WBC count and differential count; health complaints; serum albumin, total protein and uric acid levels; and chest x-ray results of the respondents. Results showed that years and hours of exposure had no significant effect on the photocopier operators. However, other factors such as the number of machines, working space area and ventilation, number and kind of toner had significant effects on selected cell and serum levels in the blood of the operators and on their common health complaints. The group concludes that exposure to photocopying machines have significant effects on the health status of the photocopier operators based on the common health complaints they frequently experience, white blood cell count and differential count and blood serum levels.
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    Molluscicidal effect of quicklime, CaO on golden snail (Pomacea canaliculata)
    Baibado, Joewel Tarra (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1998-03)
    The golden snail (Pomacea canaliculata) is presently a major pest of rice in lowland and rainfed areas through out the Philippines . The problem of golden snail infestation in rice farming system includes damage to the rice plants, rice yield losses, additional expense, side effects of chemicals and destructive effect on native snails . The study was conducted to evaluate the molluscicidal effect of calcium oxide for the control of golden snails in farmlands and to determine the 96hour LC50 in order to know the lethal concentration of calcium oxide to golden snails. Calcium oxide was found to have a molluscicidal activity on golden snails The golden snails were exposed to different concentrations namely. 100 ppm. 200 ppm. 300 ppm .400 ppm. and 500 ppm Remarkable lethal effects of calcium oxide (p<0.05) has been found in 4(H) and 500 ppm concentrations which has reached 60-100 % after the 96 hour treatment. The 96-hour LC50 within the 95% confidence interval was 322.02 ppm as computed Calcium oxide is safe on rice when used as a molluscicide It performs dual function as fertilizer/soil stabilizer and molluscide. These dual effects are very significant because it means big savings on the part of the rice farmers. Considering the prevalence of this pest, farmers spend much on molluscicides and their application. With calcium oxide, the farmer has a molluscicide and soil stabilizer in one application.