http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3 2026-05-07T13:38:17Z 2026-05-07T13:38:17Z Cedo, Joseph Paulo M. http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3680 2026-05-06T19:02:39Z 1999-03-01T00:00:00Z

A Taxonomic Survey of a Seagrass Community in the Northern Coast of Semirara Island, Antique Cedo, Joseph Paulo M. The dwindling stature of the ecosystem of today has drawn attention to its neglected aspects. It is only now that people are learning the importance of the seagrass community. The coexistence of Organisms in the estuarine regions has laid a bigger importance on seagrasses, thus, prompting this research. Using three transect lines of 100 meters in length each; a taxonomic survey of the seagrass community in the Northern Coast of Semirara Island, Antique was done. The results of the study show that after having computed for the Shannon's Diversity Index, the index was highest for seagrass (0.6393) while lowest for alga (0.3003). In Site C, the index was lowest for seagrass (0.2788), while highest for alga (0.4369). Likewise, it can be noted that the following species of seagrasses can be found in the sites: Enhalus acoroides, Cymodocea rotunda/a, Cymodocea sp., Halodule pinifolia, Halodule sp., and Halophila ovalis. Meanwhile, the following species of algae were found: Halimeda macroloba, Halimeda sp., Valonia sp., Galaxaura sp., and Dictyota sp. The seagrass community can be characterized by the dominant species, which is the Cymodecea rotundata.

1999-03-01T00:00:00Z Abacan, Mary Ann R. Receno, Pia Angela O. http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3676 2026-05-06T19:02:16Z 2000-04-01T00:00:00Z

Schistosoma Mansoni and S. Japonicum Cross-Reactive Antigens: Potential Candidate Molecules for a Universal Vaccine Abacan, Mary Ann R.; Receno, Pia Angela O. A universal vaccine which protects against both Schistosoma ma11s011i and japonicum infections is not available although it is highly desirable. This study addresses the need to identify cross-reactive antigens between the two schistosome species. This is the first step towards identification of cross reactive antigens which may potentially contribute to a universal schistosome vaccine in the future. In this study, the cross reactivity of S. mansoni antigens with S. japonicum infection sera were tested using the enzyme linked immunosorbent assay. Four S. manosni antigens, namely PB 1, PB2, P28 and P30 were tested with S. japonicum mouse, rabbit and human infection sera. Based on the graph and the statistical analysis using a student t-test, PB2 and P30 elicited a positive cross reaction. Between the two, PB2 exhibited greater cross reactivity. This data suggests that the S. mansoni antigens PB2 and P30 may be potential universal vaccine candidates. Future work should focus on determining whether S. mansoni antigen PB2 and P30 can protect mice against challenge infection with S. japonicum cercariae.

2000-04-01T00:00:00Z Umali, Janice Yao, Jocelyn http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3591 2026-03-16T19:02:02Z 2002-03-01T00:00:00Z

Partial Purification and Characterization of Phenoloxidase in Coconut Beetle Larvae (Oryctes rhinoceros L.) Umali, Janice; Yao, Jocelyn Coconut beetle larvae have a protein called phenoloxidase present in their hemolymph that is essential in arthropod immune response. Prior to characterization and isolation of an enzyme designing optimum assay conditions is crucial. This will stabilize the enzyme and ensure optimal activity. In this study, phenoloxidase activity was measured as a function of varying substrates, activators with their incubation periods and incubation temperatures, and buffer pH. The substrate 4-methylcatechol appeared as the best substrate for the enzyme. Among the activators tested, trypsin efficiently activated phenoloxidase within 20-60 minutes incubation periods at 30°C in sodium phosphate buffer with pH ranging from 6.0 to 8.0. The hemolymph was partially purified for pro-phenoloxidase through DEAE and SP ion-exchange chromatography. Fractions positive for enzyme activity were loaded on SOS-PAGE. Partially purified prophenoloxidase shows a molecular weight of 85-92 kDa while its active form (phenoloxidase) has a molecular weight of 62-67 kDa.

2002-03-01T00:00:00Z Veto, Rholine Gem Martin S. Tismal, Daniel S. II http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3588 2026-03-16T19:02:13Z 2002-02-01T00:00:00Z

A Study on the Meristic and Morphometric Characteristics of Thailand Strain and GIFT Strain of Nile Tilapia (Oreochromis niloticus) Veto, Rholine Gem Martin S.; Tismal, Daniel S. II Thirteen biometric characters were used to differentiate and compare the Thailand-strain and the GIFT-strain of Nile Tilapia (Oreochromis niloticus). Meristic and morphometric data from 30 samples for each strain were subjected to descriptive and statistical analysis. The study showed that there are no significant differences in all meristic characters (number of dorsal fin rays, number of pectoral fin rays, number of pelvic fin rays, and number or anal fin rays) as well as the horizontal eye diameter between the Thailand-strain and GIFT-strain of 0. niloticus. Generally, the GIFT-strain of 0. niloticus has greater values for the other morphometric characters (head length, preorbital distance, postorbital distance, orbital depth or the head, occipital depth of the head, total body length, standard length, and total body weight) compared to the Thailand-strain 0. niloticus

2002-02-01T00:00:00Z