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    Wyświetlanie 1-3 z 3
    Tytuł:
    Biodegradation of expanded polystyrene (EPS) (Styrofoam) block as feedstock to Tribolium castaneum (Red Flour Beetle) imago: A promising plastic-degrading process
    Autorzy:
    Fabreag, Mark Angelo C.
    Familara, Joanne A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076717.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Biodegradation
    Expanded Polystyrene (EPS) (Styrofoam) Block
    Feedstock
    Ingestion
    Tribolium castaneum (Red Flour Beetle)
    Opis:
    The study was conducted to determine the biodegradation of Expanded Polystyrene (EPS) (Styrofoam) Blocks as feedstock to Tribolium castaneum (Red Flour Beetle) Imago. Three-hundred-sixty (360) Tribolium castaneum (Red Flour Beetle) Imagos were collected and acclimatized for two days before being exposed to experimentation. Incubation boxes were made using plywood. Three set-ups were prepared, with 30 Tribolium castaneum (Red Flour Beetle) each. Seven (7) grams of Styrofoam Block were placed in Set-up 1, seven (7) grams of Styrofoam and seven (7) grams of Rice grain Bran in Set-up 2 and seven (7) grams of Rice grain Bran in Set-up 3 with three replications each. Mean percent mass loss of Styrofoam and Rice grain Bran, mean percent mass loss and survival rate of Tribolium castaneum (Red Flour Beetle) were measured at 5th, 10th, 15th and 20th day incubation periods. Maximum mean percent mass loss in the different set-ups was observed at the 10th, 15th and 20th incubation period, with loses of 7.14%, 10.71% and 10.71%, respectively. Meanwhile, maximum mean percent increased weight of Tribolim castaneum (Red Flour Beetle) was observed at the 10th day incubation period, with 13.51%, 44.44% and 37.93%, respectively. Microscopic observation, of a dark white smear on the gut of the specimen indicates that Tribolium castaneum (Red Flour Beetle) Imago really masticate and biodegrade the Expanded Polystyrene (EPS) (Styrofoam) blocks. The survival rate of Tribolium castaneum (Red Flour Beetle) in the diverse set-ups showed no significant difference. This implies that ingestion of Styrofoam Block had no lethal effects on the natural weight variation and health of the Tribolium castaneum (Red Flour Beetle). Hence, results indicate that Expanded Polystyrene (EPS) (Styrofoam) Block can be a feedstock for Tribolium castaneum (Red Flour Beetle).
    Źródło:
    World News of Natural Sciences; 2019, 24; 145-156
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Restoration of Charcoal-Site Soil Properties on Modified Land Models through Bioremediation Potential of Peanut (Arachis hypogaea L.)
    Autorzy:
    Mejico, Siegfred M.
    Garcia, Renier B.
    Familara, Joanne A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1077471.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Arachis hypogaea
    bioremediation potential
    charcoal site soil
    fire-induced perturbation
    peanut
    peanuts
    physicochemical properties
    Opis:
    Burning can substantially change vegetation status, and enhance the soil erosion of previously productive areas (Santin & Doerr, 2016). This is why bioremediation techniques have been developed to accelerate the recovery of soil properties. In this four month-long study, the bioremediation potential of peanut plants was tested in restoring charcoal-site soil properties. The experiment had three set-ups, a positive control and a control that had undergo pyrolysis for a week and then was planted with peanuts. The moisture content and pH, Nitrogen, Phosphorus and Potassium (NPK) of all soils were tested with a soil kit from the Department of Agriculture, before and after pyrolysis and after four months, which was also validated by the Bureau of Soils. In the experiment, plant morphology, mainly height, number of leaves and leaf area index (LAI) showed a linear increase all throughout the study, unlike the number of flowers. These were sporadic, with first appearance on week 4, and had a peak of 16 flowers at week 10 from 14 pods. With regard to soil properties, planting peanuts made the soil alkaline (7.3 - up from 5.8 pH after pyrolysis), while Nitrogen content increased from low to medium. In contrast, Phosphorus levels stayed high all throughout the study, while Potassium levels decreased after the pyrolysis and become deficient after four months. Moreover, the moisture content increased from 3.905 after pyrolysis, to 12.69. These results provide evidence that the peanut plant has bioremediation potential on charcoal-site soils after a four month long treatment period.
    Źródło:
    World News of Natural Sciences; 2019, 23; 321-335
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Natural Fibers on the Fresh and Hardened Properties of Self-Compacting Concrete (SCC)
    Autorzy:
    Tan, Vicente Miguel A.
    Yambao, Mon Emilbert F.
    Bravo, Rodrigo Rafael
    Familara, Joanne A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076564.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Coconut Fiber
    Filling Ability
    Passing ability
    Rice Straw Fiber
    Segregation Resistance
    Self-Compacting Concrete
    Opis:
    The main purpose of the study is to explore the effect of the plant fibers having different volume fraction on the fresh properties of the mix design of SCC such as filling ability, passing ability and segregation resistance as well as its influence on the compressive strength of the hardened SCC. The study started by conducting preliminary test on the aggregates needed in the construction of SCC. The aggregates were mixed together until uniform consistency was attained. Different volume fractions of CN and RS fibers were added on the mix design and molded in a cylindrical molder. The concrete were dried for 48 hours then placed in curing tank. Filling ability were tested by means of slump flow and T500 test. Passing ability were tested using J-ring while segregation resistance were tested using V-funnel and T5min. Hardened SCC with plant fibers were tested for its compressive strength. Based from the collected data, the filling ability were significantly affected by decreasing the slump flow of self-compacting concrete while increasing the time of SCC to spread to a diameter of 500 mm (T500). Furthermore, the passing ability and segregation resistance of SCC increases upon adding various volume fractions of CN and RS fibers. Statistical analysis further proves that there is significant difference between the normal SCC and the SCC with different percentages of CN and RS fibers. In addition, most favorable compressive strength were found when 0.05% CN fiber and 0.10% RS fiber were added to SCC after 7 and 28 curing days.
    Źródło:
    World Scientific News; 2019, 115; 229-241
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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