The University of Eastern Philippines is a public university in the Philippines. The University is the only comprehensive state university in Eastern Visayas, offering the largest number of undergraduate and graduate degree programs and short-term courses and certificates among the higher education institutions in the region. Its flagship campus is in Catarman, Northern Samar. The University of Eastern Philippines is the first State University in the Visayas. Wikipedia.
Hilario J.S.,University of Eastern Philippines |
Celajes A.G.,Mapua Institute of Technology
Research Journal of Chemistry and Environment | Year: 2015
The kinetics of the reduction of hexavalent to trivalent chromium using ferrous sulphate (FeSO4) under acidic condition was studied using two methods of UV-Visible spectroscopy - the HACH and the Lambda Series. Potassium dichromate (K2Cr2O7) was used as source of Cr6+. Due to complexity and time consuming steps of the Lambda Series, the HACH Method was employed as screen test. As soon as the trial gave good results from the HACH method, the Lambda series was performed. Comparison of the results was carried out and several differences were noted. The study was composed of four parts - kinetics of the reduction of potassium dichromate by ferrous sulphate, determination of the rate and order of reaction, analysis of chromium hexavalent using the Diphenylcarbazide Method of HACH and Lambda Series UV-Vis spectrometer and determination of rate constant. There are several trials performed to arrive at the procedure for the reduction of hexavalent chromium via ferrous sulphate presented herein. Same is true with the rate and order of reaction. At a ratio of 1:10 of potassium dichromate to ferrous sulphate, a good result for the rate and order of reaction was obtained. Results from the procedures showed that the overall rate of reaction is first order - that is zero order with respect to K2Cr2O7 and first order with respect to FeSO4. In the kinetic study, a ratio of 3:5 K2Cr2O7 to FeSO4 also showed good results in which the rate constant was computed to be 1.7 × 10-4 per second. However this result was only obtained from the HACH Method. Lambda Series showed different results in the computation of rate constant.
Mendoza R.M.O.,University of Eastern Philippines |
Mendoza R.M.O.,Chia Nan University of Pharmacy and Science |
Kan C.-C.,Chia Nan University of Pharmacy and Science |
Chuang S.-S.,Royal Dutch Shell |
And 3 more authors.
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering | Year: 2014
The effectiveness of electrodialysis (ED) in removing inorganic arsenic (As) from aqueous solution was investigated. A tailor-made ED stack was used to perform current-voltage and optimization experiments in a recirculating batch mode. Samples were pre-oxidized with NaClO using 1:2 sample to oxidant weight ratio (RS:O) to transform 100% of As(III) to As(V) in 180 seconds. A high feed water conductivity of 1500 μS/cm and a low feed water conductivity of 800μS/cm had limiting currents of 595 mA and 525 mA, respectively. Optimum experimental conditions that provided maximum As separation were applied potential (E) of 12 V, feed flow rate (Q) of 0.033 L/s, feed concentration (C) of 662.0 μg L-1, and operating time (t) of 45 min, the most significant ones were applied potential, feed concentration and operating time. Model confirmation experiments showed a good agreement with experimental results with only 0.031% error. The total As in the diluate stream was 4.0 μg L -1, consisting of an average of 3.0 μg L-1 As(V) and 1.0 μg L-1 As(III). © 2014 Copyright Taylor and Francis Group, LLC.
Cabili T.M.,University of Eastern Philippines |
Cuevas V.C.,University of the Philippines at Los Banos
Journal of Environmental Science and Management | Year: 2011
This paper is part of a bigger study that investigated the livelihood strategy of the Abaknons in Capul, Northern Samar and its effects on the conservation of the island ecosystem. Capul, a small island at the northwestern part of Northern Samar, eastern Seagate of the Philippines (124° 10' E and 12°N) needs special attention being ecologically fragile due to increasing population and economic pressures. This study determined the sediment load and runoff in a small-island ecosystem and analyzed its effects on the present status of the coastal subsystem. It specifically (1) measured the sediment load and runoff in the island, (2) analyzed the physicochemical characteristics of the sediment load and runoff, and (3) analyzed the present status of the coastal subsystem through the upper leaf biomass or net primary productivity of seagrass and mollusks species diversity. The low rate of sedimentation and better quality of runoff water increased the seagrass NPP and high mollusk diversity, indicators of efficient islanders' livelihood practices and significantly conserve the coastal subsystem and subsequently the whole island ecosystem. The main threat to the coastal subsystem was exceedingly high coliform count which urges the promulgation of municipal ordinances and programs in relation to environmental health.
Rubenecia M.E.,University of Eastern Philippines
Jurnal Teknologi (Sciences and Engineering) | Year: 2013
The study determined the knowledge of the College of Science faculty on the goals of science education, the importance of each goal as perceived by the faculty, how often each goal is used and operationalized for teaching/learning purposes. The results revealed that teachers' level of knowledge on the science goals and objectives was minimal. The faculty perceived scientific knowledge and methods very important and used it frequently in teaching. They used lecture for students to acquire scientific knowledge and laboratory activities to develop scientific methods. They did not know how to operationalize societal issues, personal needs, and career awareness when teaching their subject matter. The problems that prevent them from pursuing the goals were lack of instructional materials, lack of interest and negative attitude of students, lack of facilities, and knowledge in handling laboratory apparatus. Teachers do not utilize strategies that can facilitate the students' construction of meaning and ideas. © 2013 Penerbit UTM Press. All rights reserved.
Chato-Salvador R.C.,University of Eastern Philippines |
Tablizo F.A.,University of the Philippines at Diliman |
Lluisma A.O.,University of the Philippines at Diliman
European Journal of Phycology | Year: 2014
Cell culture technology is immensely useful in somatic hybridization, induction of mutations, cloning of specific isolates and maintenance of strains of defined genotypes. However, its application in strain improvement of some tropical red macroalgae has been limited due to the difficulty of isolating viable cells from their complex intercellular matrices. A simple, non-enzymatic technique of isolating somatic cells was developed for Kappaphycus spp. and Echeuma denticulatum. Surface-sterilized tissues (0.1 g fresh weight, 2.0 mm thick discs) from subcortical and medullary layers were treated with 3% NaOH, 3% KOH, or hydrogen peroxide in phosphate buffer solution (PBH2O2). Tissues of K. alvarezii treated with PBH2O2 softened after 5 h of treatment and completely dissociated after 12 h. Viable cell counts (VCC), determined through staining with Evan’s blue, were significantly higher (2.4 × 105 cells g−1 fresh weight tissue) in K. alvarezii (‘tambalang’ strain) treated with PBH2O2 compared with tissues treated with carrageenase from a marine bacterium. © 2014, © 2014 British Phycological Society.