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11.
Nilawati Dewi Matsuura Norihisa Honda Ryo Hara-Yamamura Hiroe Sintawardani Neni Yamamoto-Ikemoto Ryoko 《Journal of Material Cycles and Waste Management》2021,23(2):537-547
Journal of Material Cycles and Waste Management - Wastewater generated during acid coagulation in tofu processing has high organic concentrations and low pH. Several small industries in Indonesia... 相似文献
12.
Heikens A Widianarko B Dewi IC de Boer JL Seinen W van Leeuwen K 《Environmental geochemistry and health》2005,27(5-6):475-483
In Asembagus (East Java, Indonesia), surface water is contaminated with effluent from the hyperacid Ijen Crater Lake. In a
previous study, we reported that food crops irrigated with this water had increased concentrations of various elements. Here,
we present a total diet study for adults and 6-year-old children to determine if the mean daily intake of a broad range of
elements is safe and adequate. For children, the intake of B, Mg, Mn and V is high with Hazard Quotients (HQ) of 1.1 (B),
1.4 (Mn) and 1.4 (V), respectively (no TDI is available for Mg). For Mn, the daily intake is high due to the consumption of
locally produced rice. Drinking water is the main source of B, Mg and V. For adults, the intake of Mg, Mn and V is also high
but HQ values are ≤0.7. For both children and adults, the intake of Ca, Zn and particularly Fe is below the RNI (Fe intake
is 90% below the RNI for women). It is concluded the mean intake of elements is unbalanced and Fe deficiency is probably the
most serious health problem. Toxic effects cannot be fully excluded since deficiency of essential elements such as Ca, Fe
and Zn can increase the absorption and retention of various elements. 相似文献
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14.
I. Made Arcana Bunbun Bundjali M. Hasan Ketut Hariyawati Helen Mariani Shinta Dewi Anggraini Aditya Ardana 《Journal of Polymers and the Environment》2010,18(3):188-195
Poly(urethane-ester) was prepared by polymerization of 4,4′-methylenebis(phenyl isocyanate) (MDI) and prepolymers of ε-caprolactone and 2,2-dimethyl-1,3-propanediol monomers P(CL-DP) with various chain lengths as polyol sources. Characterizations of poly(urethane-ester) were carried out by analysis of functional groups (FTIR), thermal properties (DTA/TGA), mechanical properties (Tensile tester), crystallinity (XRD), and biodegradability. The chain length of prepolymers used in polymerization has a significant effect in properties of poly(urethane-ester) as well as their biodegradability. The formation of poly(urethane-ester) was indicated by the presence of new absorption peaks at wave number of 3,348.2 and 1,596.9 cm?1 for urethane (–NH–) and aromatic groups in chain of polymers, respectively. The increase chain length of prepolymer used in polymerization with 4,4′-methylenebis(phenyl isocyanate) was observed the increase thermal property and crystallinity of poly(urethane-ester). However, the maximum mechanical property and also biodegradability in activated sludge were observed in poly(urethane-ester) prepared by polymerization of 4,4′-methylenebis(phenyl isocyanate) (MDI) and P(CL-DP) prepolymers with DP/CL ratio of 1/20. Apparently, the amorphous parts of polymers are rapidly decomposed by enzymes of microorganisms, so the crystallinity on the whole of poly(urethane-ester) increases after incubation time of 30 days. 相似文献
15.
Septevani Athanasia Amanda Burhani Dian Sampora Yulianti Indriyati Shobih Rosa Erlyta Septa Sondari Dewi Margyaningsih Nur Ita Septiyani Melati Yurid Fitra Handayani Aniek Sri 《Journal of Polymers and the Environment》2022,30(9):3901-3913
Journal of Polymers and the Environment - Cellulose nanopaper (CNP) is a new potential candidate for flexible biopolymer substrate made of nanocellulose (NC). We systematically studied the effect... 相似文献