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02. DSSC Electronic Theses and Dissertations

Permanent URI for this communityhttps://hdl.handle.net/20.500.14578/3

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Department: search.filters.department.Institute of Computing Engineering and TechnologySDG: search.filters.sdg.SDG 9 - Industry, innovation and infrastructure

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    Water consumption and growth of pechay in Kratky method at different depth level of nutrient solution under shaded condition
    Canon, Kirby S. (Davao del Sur State College, 2024-05)
    Green crops are currently cultivated using a hydroponic method. However, the production cost is quite expensive due to the higher cost of commercial nutrient solutions. The purpose of the thesis study was to explore the possibility of reducing the quantity of nutrient solutions and their impact on the growth of pechay. The study was carried out using a Completely Randomized Design (CRD) with three treatments replicated three times. T1 (2 inches depth), T2 (3 inches depth), and T3 (4 inches depth). The collected data were analyzed using a One-Way Analysis of Variance (ANOVA) at a significance level of 5%. The Least Significant Difference (LSD) test was employed to ascertain the variations between the different treatments. The analysis indicated that the treatments revealed significantly varied in root length with a P-value of 0.0010. Further, the analysis indicates that there is no statistically significant difference in terms of mean daily water consumption, plant height, number of leaves, breadth of leaves, plant yield, mean daily difference temperature nutrient solution, and mean daily difference pH level, as indicated with P-values of 0.03272, 0.3787, 0.4376, 0.3787, 0.0727, 0.2997, and 0.4029 respectively.
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    Processing of paperboard from the fiber of torch ginger (Etlingera elatior) stem at different levels of cassava starch as binder
    Blasquez, Irenella A. (Davao del Sur State College, 2024-05)
    This study examined the potential of torch ginger (Etlingera elatior) stem fiber as an alternative source of fiber added with different levels of cassava starch as binder for paperboard production. The study was established with three (3) treatments and each is replicated thrice. The treatments were: Treatment 1: 240 grams cassava starch, Treatment 2: 320 grams cassava starch, and Treatment 3: 480 grams cassava starch. Using a molder, the pulp was molded and sundried until the desired weight was achieved. The paperboards were then tested in terms of odor, paper whiteness, smoothness/texture, grammage, water absorbency, and pH level. The data collected was statistically analyzed using one-way analysis of variance (ANOVA) at 1% and 5% levels of significance. Statistically, results showed significant difference in the odor, paper whiteness, smoothness of texture, or water absorbency of the produced paperboard among the treatments, while the ANOVA results for grammage showed a significant difference. Moreover, the pH level was tested in a composite manner, with pH values ranging from 8.7-9.0 and Treatment 1 having the lowest unit production cost analysis which if PHP 14.46 per piece of paperboard. Thus, torch ginger (E. elatior) stem fiber is a potential material for paperboard production.