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Vilela, Paulina,Liu, Hongbin,Lee, SeungChul,Hwangbo, Soonho,Nam, KiJeon,Yoo, ChangKyoo Elsevier 2018 Science of the Total Environment Vol.633 No.-
<P><B>Abstract</B></P> <P>The release of silver nanoparticles (AgNPs) to wastewater caused by over-generation and poor treatment of the remaining nanomaterial has raised the interest of researchers. AgNPs can have a negative impact on watersheds and generate degradation of the effluent quality of wastewater treatment plants (WWTPs). The aim of this research is to design and analyze an integrated model system for the removal of AgNPs with high effluent quality in WWTPs using a systematic approach of removal mechanisms modeling, optimization, and control of the removal of silver nanoparticles. The activated sludge model 1 was modified with the inclusion of AgNPs removal mechanisms, such as adsorption/desorption, dissolution, and inhibition of microbial organisms. Response surface methodology was performed to minimize the AgNPs and total nitrogen concentrations in the effluent by optimizing operating conditions of the system. Then, the optimal operating conditions were utilized for the implementation of control strategies into the system for further analysis of enhancement of AgNPs removal efficiency. Thus, the overall AgNP removal efficiency was found to be slightly higher than 80%, which was an improvement of almost 7% compared to the BSM1 reference value. This study provides a systematic approach to find an optimal solution for enhancing AgNP removal efficiency in WWTPs and thereby to prevent pollution in the environment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An ASM-AgNP model is proposed and optimized maximizing the removal efficiency of silver nanoparticles. </LI> <LI> The system operation and cost in control performance are analyzed to investigate the impact of its implementation. </LI> <LI> Various scenarios are studied for evaluating the removal efficiency capacity of the system with silver nanoparticles. </LI> <LI> The highest silver nanoparticles removal efficiency obtained was of 80% with the optimal operating conditions of the model. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Physiological and Molecular Characterization of Cephaleuros virescens Occurring in Mango Trees
Camila Vilela Vasconcelos,Fabíola Teodoro Pereira,Elizabeth Amélia Alves Duarte,Thiago Alves Santos de Oliveira,Nei Peixoto,Daniel Diego Costa Carvalho 한국식물병리학회 2018 Plant Pathology Journal Vol.34 No.3
The objective of this work was to accomplish the isolation, molecular identification and characterizing the physiology of the causal agent of the algal spot in mango trees. For this purpose, the pathogen growth was assessed in different culture media, with subsequent observation and measurements of the filamentous cells. The molecular identification was made using mycelium obtained from leaf lesions and pure algae colonies grown in culture medium. Descriptions based on DNA sequencing indicated that the algae is Cephaleuros virescens. The algae must be isolated primarily in liquid medium for further pricking into agar medium. The highest mycelial growth average in Petri dishes occurred when the algae were grown in Trebouxia and BBM. Trebouxia enabled larger cells in the filamentous cells when compared to other culture media.
Paulina Vilela,허성구,황보순호,유창규 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.7
A two-objective, two-stage mathematical model was developed considering demand uncertainty and operational risk assessment in constructing a utility supply network for steam generation and steam exchange in a petrochemical industrial park. This study defined two objective functions, the total economic cost and risk cost, where the demand uncertainty enhanced the reliability of the utility network design. The economic and risk cost present a holistic study, where the actual operation cost and additional costs in case of industrial operation failure can be determined. For this, two stages were established for both objective functions, a deterministic stage and a stochastic stage. The deterministic stage fixed the parameter values for the optimization problem, while the stochastic stage included the steam supply-demand uncertainty. A case study of the Yeosu industrial park in South Korea was used to show the feasibility of the proposed method, proposing five scenarios for risk assessment analyses. A Pareto set was drawn, showing the optimal values of the optimization scenarios studied. From the optimization analysis, scenario 5 showed the best utility supply network design providing a more realistic network with a balanced total economic cost and risk cost, which presented the lowest risk operation of all facilities. From scenario 5, the results showed a decrease in economic cost by 65.5% to 67.6% compared to the current situation considering the risk costs for the operational risk.
Ana Beatriz Vilela Teixeira,Mariana Lima da Costa Valente,João Pedro Nunes Sessa,Bruna Gubitoso,Marco Antonio Schiavon,Andréa Cândido dos Reis 대한치과보철학회 2023 The Journal of Advanced Prosthodontics Vol.15 No.2
PURPOSE. This study incorporated the nanomaterial, nanostructured silver vanadate decorated with silver nanoparticles (AgVO3), into heat-cured resin (HT) at concentrations of 2.5%, 5%, and 10% and compared the adhesion of multispecies biofilms, surface characteristics, and mechanical properties with conventional heat-cured (HT 0%) and printed resins. MATERIALS AND METHODS. AgVO3 was incorporated in mass into HT powder. A denture base resin was used to obtain printed samples. Adhesion of a multispecies biofilm of Candida albicans, Candida glabrata, and Streptococcus mutans was evaluated by colony-forming units per milliliter (CFU/mL) and metabolic activity. Wettability, roughness, and scanning electron microscopy (SEM) were used to assess the physical characteristics of the surface. The mechanical properties of flexural strength and elastic modulus were tested. RESULTS. HT 10%-AgVO3 showed efficacy against S. mutans; however, it favored C. albicans CFU/mL (P < .05). The printed resin showed a higher metabolically active biofilm than HT 0% (P < .05). There was no difference in wettability or roughness between groups (P > .05). Irregularities on the printed resin surface and pores in HT 5%-AgVO3 were observed by SEM. HT 0% showed the highest flexural strength, and the resins incorporated with AgVO3 had the highest elastic modulus (P < .05). CONCLUSION. The incorporation of 10% AgVO3 into heat-cured resin provided antimicrobial activity against S. mutans in a multispecies biofilm did not affect the roughness or wettability but reduced flexural strength and increased elastic modulus. Printed resin showed higher irregularity, an active biofilm, and lower flexural strength and elastic modulus than heat-cured resin. [J Adv Prosthodont 2023;15:80-92]
Physiological and Molecular Characterization of Cephaleuros virescens Occurring in Mango Trees
Vasconcelos, Camila Vilela,Pereira, Fabiola Teodoro,Duarte, Elizabeth Amelia Alves,de Oliveira, Thiago Alves Santos,Peixoto, Nei,Carvalho, Daniel Diego Costa The Korean Society of Plant Pathology 2018 Plant Pathology Journal Vol.34 No.3
The objective of this work was to accomplish the isolation, molecular identification and characterizing the physiology of the causal agent of the algal spot in mango trees. For this purpose, the pathogen growth was assessed in different culture media, with subsequent observation and measurements of the filamentous cells. The molecular identification was made using mycelium obtained from leaf lesions and pure algae colonies grown in culture medium. Descriptions based on DNA sequencing indicated that the algae is Cephaleuros virescens. The algae must be isolated primarily in liquid medium for further pricking into agar medium. The highest mycelial growth average in Petri dishes occurred when the algae were grown in Trebouxia and BBM. Trebouxia enabled larger cells in the filamentous cells when compared to other culture media.
Agroforest System Implantation for Gully Erosion Control in Pindorama Reserve, Brazil
Maria Teresa Vilela Nogueira A,Sidney Rosa Vieira,Antonio Lucio Mello Martins,Everton Luis Finoto,Eliane Gomes Fabri,Teresa Cristina Tarle Pissarra,Fernanda Fernandes Salazar,Mariana Barbara Lopes Bon 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6