860 results on '"Nguyen, DD"'
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2. Parkinsonism-hyperpyrexia syndrome: a case report emphasizing early recognition and management in Parkinson’s disease
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Nguyen, DD, primary, Rader, H, additional, Coe, BA, additional, Bell, M, additional, Sanne, S, additional, and McCarron, R, additional
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- 2024
- Full Text
- View/download PDF
3. What the BRASH?
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Nguyen, DD, primary, Qureshi, H, additional, Olejniczak, MK, additional, Sanne, S, additional, and McCarron, R, additional
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- 2024
- Full Text
- View/download PDF
4. Knowledge About COVID-19, Beliefs and Vaccination Acceptance Against COVID-19 Among High-Risk People in Ho Chi Minh City, Vietnam
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Huynh G, Nguyen TV, Nguyen DD, Lam QM, Pham TN, and Nguyen HTN
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beliefs ,covid-19 ,health belief model ,knowledge ,vaccination ,Infectious and parasitic diseases ,RC109-216 - Abstract
Giao Huynh,1 Tap Van Nguyen,2 Dung Dang Nguyen,1 Quang Minh Lam,1 Tuan Nhat Pham,1 Han Thi Ngoc Nguyen3 1Faculty of Public Health, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam; 2Faculty of Medicine, Tra Vinh University, Tra Vinh City, Tra Vinh Province, Vietnam; 3Infection Control Department, University Medical Center Ho Chi Minh City, Ho Chi Minh City, VietnamCorrespondence: Tap Van NguyenTra Vinh University, 126 Nguyen Thien Thanh Street, Tra Vinh City, Tra Vinh Province, VietnamTel +84914064340Email nvtap@tvu.edu.vnGiao HuynhUniversity of Medicine and Pharmacy at Ho Chi Minh City, 217 Hong Bang Street, District 5, Ho Chi Minh City, VietnamTel +84908608338Email hgiaoytcc@ump.edu.vnBackground: Vaccination is one of the best ways to control a pandemic such as COVID-19. However, identifying community apprehensions towards vaccination needs to be understood in detail. This study aims to determine the factors that can predict the acceptance of the COVID-19 vaccine.Methods: A cross-sectional study was considered by systematic random sampling of 425 adults with chronic illnesses in Ho Chi Minh City. Data were collected between December 2020 and January 2021 via a self-administered, structured questionnaire. The main outcome was the acceptance of future COVID-19 vaccinations.Results: A total of 425 eligible adults responded to the survey, whose mean age was 52.9± 15.6 years; 67.8% of them were women, more than a half of them had high school education level or higher (57.4%) and received COVID-19 information mainly via television and social media accounted for 82.4% and 58.1%, respectively. Overall, knowledge of COVID-19 was reported as relatively good, with a mean score of 7.11 ± 1.77 (0– 9). Determinants of vaccination acceptance were knowledge and cues to action. Accordingly, there was a 1.2-fold increase in the odds of acceptance of COVID-19 vaccination for a 1-unit increase in “the total knowledge score” (AOR 1.2, 95% CI: 1.1– 1.3, p< 0.05), and there was a 3.2-fold increase in the odds of vaccination acceptance for a 1-unit increase in “cues to action” (AOR 3.2, 95% CI: 1.7– 5.8, p< 0.001).Conclusion: Determinants that influence the intention to have the COVID-19 vaccination are identified, which can be applied to future health education interventions that should focus on enhanced knowledge towards COVID-19 via mass media messages and cues to action from healthcare workers’ recommendations to promote vaccine acceptance.Keywords: beliefs, COVID-19, health belief model, knowledge, vaccination
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- 2021
5. Improved Dynamical Constraints on the Mass of the Central Black Hole in NGC 404
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Nguyen, DD, Seth, AC, Den Brok, M, Neumayer, N, Cappellari, M, Barth, AJ, Caldwell, N, Williams, BF, and Binder, B
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galaxies: individual ,Galaxy: kinematics and dynamics ,Galaxy: nucleus ,methods: data analysis ,methods: observational ,techniques: spectroscopic ,astro-ph.GA ,Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Physical Chemistry ,Astronomy & Astrophysics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Physical Chemistry (incl. Structural) - Abstract
We explore the nucleus of the nearby 109 M⊙ early-type galaxy, NGC 404, using Hubble Space Telescope (HST)/STIS spectroscopy and WFC3 imaging. We first present evidence for nuclear variability in UV, optical, and infrared filters over a time period of 15 years. This variability adds to the already substantial evidence for an accreting black hole at the center of NGC 404. We then redetermine the dynamical black hole mass in NGC 404 including modeling of the nuclear stellar populations. We combine HST/STIS spectroscopy with WFC3 images to create a local color-M/L relation derived from stellar population modeling of the STIS data. We then use this to create a mass model for the nuclear region. We use Jeans modeling to fit this mass model to adaptive optics stellar kinematic observations from Gemini/NIFS. From our stellar dynamical modeling, we find a 3σ upper limit on the black hole mass of 1.5 × 105 M⊙. Given the accretion evidence for a black hole, this upper limit makes NGC 404 the lowest mass central black hole with dynamical mass constraints. We find that the kinematics of H2 emission line gas show evidence for non-gravitational motions preventing the use of gas dynamical modeling to constrain the black hole mass. Our stellar population modeling also reveals that the central, counter-rotating region of the nuclear cluster is dominated by ∼1 Gyr old populations.
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- 2017
6. Validity and Reliability Assessment of Attitude Scales for Hepatitis B Vaccination Among Parents in Ho Chi Minh City, Vietnam
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Huynh G, Pham DUB, Nguyen TV, Bui VQ, Nguyen TNH, Nguyen DD, and Pham LA
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hepatitis b ,vaccination ,children ,reliability ,health belief model ,Public aspects of medicine ,RA1-1270 - Abstract
Giao Huynh,1 Duong Uyen Binh Pham,2 Truong Vien Nguyen,1 Vinh Quang Bui,3 Thi Ngoc Han Nguyen,4 Dang Dung Nguyen,1 Le An Pham5 1Faculty of Public Health, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam; 2Quality Assurance of Education, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam; 3Department of Pediatrics, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam; 4Infection Control Department, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam; 5Center for Training in Family Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, VietnamCorrespondence: Giao Huynh; Duong Uyen Binh PhamUniversity of Medicine and Pharmacy at Ho Chi Minh City, 217 Hong Bang Street, District 5, Ho Chi Minh City, VietnamTel +84908608338; +84902660916Email hgiaoytcc@ump.edu.vn, p.d.uyenbinh@gmail.comBackground: Attitudes and beliefs could be associated with the low number of vaccinations in low- to middle-income countries such as Vietnam. This study aims to describe ways to develop and assess the attitudes towards Hepatitis B vaccination.Methods: A mixed-method study was carried out between April 2015 and July 2017. Qualitative data were gathered via semi-structured interviews and focus group discussions. The data were then analyzed thematically into four domains of the Health Belief Model (HBM) in order to design the structured questionnaire. The quantitative strand was followed by the evaluation of the reliability and the construct validity, for which data were obtained after interviewing 768 parents whose children aged from 12 to 24 months, who were receiving the vaccines as part of the Expanded Programme on Immunization (EPI) schedules at the Commune Health Centers.Results: The findings showed the content validity index value of 13 items ranged from 0.86 to 1.00. The factor analyses showed that 11 items remained in the final questionnaire after deleting 2 problematic items due to no relation to the total scales and revealed four factors (perceived susceptibility, perceived severity, perceived benefits, perceived barriers) that jointly accounted for 62.1% of the observed variances. All four factors have good internal consistency with a total Cronbach’s alpha of 0.735. A confirmatory factor analysis demonstrated the proposed factor model which fits well in four domains of HBM.Conclusion: Attitude scales for Hepatitis B vaccination based on HBM have been developed. This has confirmed to be a valid and reliable instrument that might be useful in assessing parents’ attitudes regarding Hepatitis B vaccination and may be used to promote interventions within the increasing vaccination coverage for Vietnamese children.Keywords: Hepatitis B, vaccination, children, reliability, Health Belief Model
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- 2020
7. Sustainable production and application of biochar for energy storage and conversion
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Do, QC, Tran, TN, Tran, TH, La, DD, Ngo, HH, Thanh, BX, Chang, SW, Nguyen, DD, Do, QC, Tran, TN, Tran, TH, La, DD, Ngo, HH, Thanh, BX, Chang, SW, and Nguyen, DD
- Abstract
Efficient solutions for storing and converting energy sources with sustainable and environment-friendly materials play an increasingly important role in ensuring energy security and promoting the development of sustainable energy sectors. Biochar-based materials have been known as promising materials for energy storage and conversion applications owing to their superior structural properties (e.g., the porosity and large surface area) and diversity of functional groups, which can be exploited for safe, modern, and environment-friendly materials. In addition, owing to the abundance of raw materials (in particular, waste biomass sources), biochar-based materials for energy storage and conversion applications can be produced at a reasonable cost. This chapter presents a critical overview of the importance of biochar for energy storage and conversion applications and the presented biochar production and modification techniques. The potential applications and challenges of these biochar materials in the energy storage and conversion field are also discussed to make relevant judgments for the future.
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- 2023
8. Influence of the COVID-19 pandemic on climate change summit negotiations from the climate governance perspective.
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Vo, TPT, Ngo, HH, Guo, W, Turney, C, Liu, Y, Nguyen, DD, Bui, XT, Varjani, S, Vo, TPT, Ngo, HH, Guo, W, Turney, C, Liu, Y, Nguyen, DD, Bui, XT, and Varjani, S
- Abstract
The COVID-19 pandemic has caused significant disruptions to the world since 2020, with over 647 million confirmed cases and 6.7 million reported deaths as of January 2023. Despite its far-reaching impact, the effects of COVID-19 on the progress of global climate change negotiations have yet to be thoroughly evaluated. This discussion paper conducts an examination of COVID-19's impact on climate change actions at global, national, and local levels through a comprehensive review of existing literature. This analysis reveals that the pandemic has resulted in delays in implementing climate policies and altered priorities from climate action to the pandemic response. Despite these setbacks, the pandemic has also presented opportunities for accelerating the transition to a low-carbon economy. The interplay between these outcomes and the different levels of governance will play a crucial role in determining the success or failure of future climate change negotiations.
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- 2023
9. Recent advances and applicable flexibility potential of electrochemical processes for wastewater treatment.
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AlJaberi, FY, Ahmed, SA, Makki, HF, Naje, AS, Zwain, HM, Salman, AD, Juzsakova, T, Viktor, S, Van, B, Le, P-C, La, DD, Chang, SW, Um, M-J, Ngo, HH, Nguyen, DD, AlJaberi, FY, Ahmed, SA, Makki, HF, Naje, AS, Zwain, HM, Salman, AD, Juzsakova, T, Viktor, S, Van, B, Le, P-C, La, DD, Chang, SW, Um, M-J, Ngo, HH, and Nguyen, DD
- Abstract
This study examined >140 relevant publications from the last few years (2018-2021). In this study, classification was reviewed depending on the operation's progress. Electrocoagulation (EC), electrooxidation (EO), electroflotation (EF), electrodialysis (ED), and electro-Fenton (EFN) processes have received considerable attention. The type of action (individual or hybrid) for each electrochemical procedure was evaluated, and statistical analysis was performed to compare them as a new manner of reviewing cited papers providing a massive amount of information efficiently to the readers. Individual or hybrid operation progress of the electrochemical techniques is critical issues. Their design, operation, and maintenance costs vary depending on the in-situ conditions, as evidenced by surveyed articles and statistical analyses. This work also examines the variables affecting the elimination efficacy, such as the applied current, reaction time, pH, type of electrolyte, initial pollutant concentration, and energy consumption. In addition, owing to its efficacy in removing toxins, the hybrid activity showed a good percentage among the studies reviewed. The promise of each wastewater treatment technology depends on the type of contamination. In some cases, EO requires additives to oxidise the pollutants. EF and EFN eliminated lightweight organic pollutants. ED has been used to treat saline water. Compared to other methods, EC has been extensively employed to remove a wide variety of contaminants.
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- 2023
10. Application of Sewage Sludge as an Agricultural Soil Amendment
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Ye, Y, Ngo, HH, Guo, W, Ding, A, Deng, S, Nguyen, DD, Bui, XT, Ye, Y, Ngo, HH, Guo, W, Ding, A, Deng, S, Nguyen, DD, and Bui, XT
- Abstract
During the wastewater treatment process, the disposal of sewage sludge has raised many concerns about the various pollutants that are contained within it. Given the high concentrations of organic substances and nutrients found in sewage sludge, it is now attractive to apply sewage sludge as an agricultural soil amendment for growing crops and an environmentally friendly method of waste management. However, it is important to identify the properties of sewage sludge and possible challenges prior to the application. In this chapter, the physico-chemical properties of sewage sludge are described, as are the types of treatment processes and quantity and quality of sewage. Applying sewage sludge in agricultural soil was evaluated in terms of soil property and plant growth. Since sewage sludge contains pollutants, such as antibiotics, heavy metals and microplastics, the use of this sludge in agriculture may result in serious unintended environmental problems. For this reason, such issues were identified here. Lastly, conclusions are documented and possible future directions for developing agricultural applications of sewage sludge were suggested.
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- 2023
11. WISDOM Project - XIII. Different molecular structure populations and collision-driven turbulence in the dwarf lenticular galaxy NGC404
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Liu, L, Bureau, M, Li, G-X, Davis, GA, Nguyen, DD, Liang, F, Choi, W, Smith, M, and Iguchi, S
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We present a study of molecular structures (clumps and clouds) in the dwarf galaxy NGC 404 using high-resolution (≈ 0.86 × 0.51 pc2 ) Atacama Large Millimeter/sub-millimeter Array 12CO(2-1) observations. We find two distinct regions in NGC 404: a gravitationally-stable central region (Toomre parameter 𝑄 = 3 − 30) and a gravitationally-unstable molecular ring (𝑄 ≲ 1). The molecular structures in the central region have a steeper size – linewidth relation and larger virial parameters than those in the molecular ring, suggesting gas is more turbulent in the former. In the molecular ring, clumps exhibit a shallower mass – size relation and larger virial parameters than clouds, implying density structures and dynamics are regulated by different physical mechanisms at different spatial scales. We construct an analytical model of clump-clump collisions to explain the results in the molecular ring. We propose that clumpclump collisions are driven by gravitational instabilities coupled with galactic shear, that lead to a population of clumps whose accumulation lengths (i.e. average separations) are approximately equal to their tidal radii. Our model-predicted clump masses and sizes (and mass – size relation) and turbulence energy injection rates (and size – linewidth relation) match the observations in the molecular ring very well, suggesting clump-clump collisions is the main mechanism regulating clump properties and gas turbulence in that region. As expected, our collision model does not apply to the central region, where turbulence is likely driven by clump migration.
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- 2022
12. Roles, mechanism of action, and potential applications of sulfur-oxidizing bacteria for environmental bioremediation
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Nguyen, PM, Do, PT, Pham, YB, Doan, TO, Nguyen, XC, Lee, WK, Nguyen, DD, Vadiveloo, A, Um, M-J, and Ngo, HH
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Nitrates ,Bacteria ,Sulfamethoxazole ,Thiosulfates ,Quinones ,Sulfides ,Alkalies ,Soil ,Biodegradation, Environmental ,Sulfites ,Hydrogen Sulfide ,Hydrogensulfite Reductase ,Oxidoreductases ,Oxidation-Reduction ,Environmental Sciences ,Sulfur - Abstract
Sulfur (S) is a crucial component in the environment and living organisms. This work is the first attempt to provide an overview and critical discussion on the roles, mechanisms, and environmental applications of sulfur-oxidizing bacteria (SOB). The findings reveal that key enzymes of SOB embarked on oxidation of sulfide, sulfite, thiosulfate, and elemental S. Conversion of reduced S compounds was oxidatively catalyzed by various enzymes (e.g. sulfide: quinone oxidoreductase, flavocytochrome c-sulfide dehydrogenase, dissimilatory sulfite reductase, heterodisulfide reductase-like proteins). Environmental applications of SOB discussed include detoxifying hydrogen sulfide, soil bioremediation, and wastewater treatment. SOB producing S0 engaged in biological S soil amendments (e.g. saline-alkali soil remediation, the oxidation of sulfide-bearing minerals). Biotreatment of H2S using SOB occurred under both aerobic and anaerobic conditions. Sulfide, nitrate, and sulfamethoxazole were removed through SOB suspension cultures and S0-based carriers. Finally, this work presented future perspectives on SOB development, including S0 recovery, SOB enrichment, field measurement and identification of sulfur compounds, and the development of mathematical simulation.
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- 2022
13. Wastewater-derived biohydrogen: Critical analysis of related enzymatic processes at the research and large scales
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Feng, S, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Liu, Y, Zhang, X, Bui, XT, Varjani, S, and Hoang, BN
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Bioreactors ,Fermentation ,Waste Water ,Wastewater ,Enzymes, Immobilized ,Environmental Sciences ,Hydrogen - Abstract
Organic-rich wastewater is a feasible feedstock for biohydrogen production. Numerous review on the performance of microorganisms and the diversity of their communities during a biohydrogen process were published. However, there is still no in-depth overview of enzymes for biohydrogen production from wastewater and their scale-up applications. This review aims at providing an insightful exploration of critical discussion in terms of: (i) the roles and applications of enzymes in wastewater-based biohydrogen fermentation; (ii) systematical introduction to the enzymatic processes of photo fermentation and dark fermentation; (iii) parameters that affect enzymatic performances and measures for enzyme activity/ability enhancement; (iv) biohydrogen production bioreactors; as well as (v) enzymatic biohydrogen production systems and their larger scales application. Furthermore, to assess the best applications of enzymes in biohydrogen production from wastewater, existing problems and feasible future studies on the development of low-cost enzyme production methods and immobilized enzymes, the construction of multiple enzyme cooperation systems, the study of biohydrogen production mechanisms, more effective bioreactor exploration, larger scales enzymatic biohydrogen production, and the enhancement of enzyme activity or ability are also addressed.
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- 2022
14. Advances and prospects of porphyrin-based nanomaterials via self-assembly for photocatalytic applications in environmental treatment
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La, DD, Ngo, HH, Nguyen, DD, Tran, NT, Vo, HT, Nguyen, XH, Chang, SW, Chung, WJ, and Nguyen, MDB
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0302 Inorganic Chemistry, 0306 Physical Chemistry (incl. Structural), 0399 Other Chemical Sciences ,General Chemistry - Abstract
A class of compounds called porphyrins are involved in the gas transport, catalysis, and light absorption processes of many animals and plants throughout the world. This natural mechanism can be obtained via supramolecular self-assembly of porphyrin derivatives. Porphyrin-based nanomaterials obtained via self-assembly can be utilized in many promising applications, such as optical energy or information storage devices, solar energy conversion, sensors, nanocatalysts, photoelectronics, and photodynamic therapy. This paper critically reviews recent advances in porphyrin nanostructures fabricated via self-assembly for visible-light photocatalytic reactions, and discusses their properties and applications, especially for environmental treatment. Firstly, it introduced porphyrin and a self-assembly method for fabricating porphyrin nanomaterials. Methods for fabricating porphyrin nanostructures via self-assembly were then presented, such as re-precipitation, coordination polymerization, and ionic self-assembly. Finally, the applications of porphyrin-based nanomaterials with a focus on photovoltaic applications were overviewed with highlights from recent works in this field.
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- 2022
15. Performance of a dual-chamber microbial fuel cell as a biosensor for in situ monitoring Bisphenol A in wastewater
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Do, MH, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Liu, Q, Nghiem, DL, Thanh, BX, Zhang, X, and Hoang, NB
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Electricity ,Phenols ,Bioelectric Energy Sources ,Humans ,Waste Water ,Biosensing Techniques ,Benzhydryl Compounds ,Wastewater ,Electrodes ,Environmental Sciences - Abstract
This research explores the possibilities of a dual-chamber microbial fuel cell as a biosensor to measure Bisphenol A (BPA) in wastewater. BPA is an organic compound and is considered to be an endocrine disruptor, affecting exposed organisms, the environment, and human health. The performance of the microbial fuel cells (MFCs) was first controlled with specific operational conditions (pH, temperature, fuel feeding rate, and organic loading rate) to obtain the best accuracy of the sensor signal. After that, BPA concentrations varying from 50 to 1000 μg L-1 were examined under the biosensor's cell voltage generation. The outcome illustrates that MFC generates the most power under the best possible conditions of neutral pH, 300 mg L-1 of COD, R 1000 Ω, and ambient temperature. In general, adding BPA improved the biosensor's cell voltage generation. A slight linear trend between voltage output generation and BPA concentration was observed with R2 0.96, which indicated that BPA in this particular concentration range did not real harm to the MFC's electrogenic bacteria. Scanning electron microscope (SEM) images revealed a better cover biofilm after BPA injection on the surface electrode compared to it without BPA. These results confirmed that electroactive biofilm-based MFCs can serve to detect BPA found in wastewaters.
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- 2022
16. Enhanced photo-fermentative biohydrogen production from biowastes: An overview
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Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Bui, XT, Wei, W, Ni, B, Varjani, S, and Hoang, NB
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Fermentation ,Biotechnology ,Hydrogen - Abstract
Clean energy like hydrogen can be a promising strategy to solve problems of global warming. Photo-fermentation (PF) is an attractive technology for producing biohydrogen from various biowastes cost-effectively and environmentally friendly. However, challenges of low light conversion efficiency and small yields of biohydrogen production still limit its application. Thus, advanced strategies have been investigated to enhance photo-fermentative biohydrogen production. This review discusses advanced technologies that show positive outcomes in improving biohydrogen production by PF, including the following. Firstly, genetic engineering enhances light transfer efficiency, change the activity of enzymes, and improves the content of ATP, ammonium and antibiotic tolerance of photosynthetic bacteria. Secondly, immobilization technology is refined. Thirdly, nanotechnology makes great strides as a scientific technique and fourthly, integration of dark and photo-fermentation technology is possible. Some suggestions for further studies to achieve high levels of efficiency of photo-fermentative biohydrogen production are mentioned in this paper.
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- 2022
17. Animal models of ulcerative colitis and their application in drug research
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Low D, Nguyen DD, and Mizoguchi E
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Therapeutics. Pharmacology ,RM1-950 - Abstract
Daren Low,1 Deanna D Nguyen,1,2 Emiko Mizoguchi1,2 1Gastrointestinal Unit, Department of Medicine, 2Center for the Study of Inflammatory Bowel Disease, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA Abstract: The specific pathogenesis underlying inflammatory bowel disease is complex, and it is even more difficult to decipher the pathophysiology to explain for the similarities and differences between two of its major subtypes, Crohn's disease and ulcerative colitis (UC). Animal models are indispensable to pry into mechanistic details that will facilitate better preclinical drug/therapy design to target specific components involved in the disease pathogenesis. This review focuses on common animal models that are particularly useful for the study of UC and its therapeutic strategy. Recent reports of the latest compounds, therapeutic strategies, and approaches tested on UC animal models are also discussed. Keywords: inflammatory bowel disease, preclinical trials, emerging therapy
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- 2013
18. A low-cost approach for soil moisture prediction using multi-sensor data and machine learning algorithm
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Nguyen, TT, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Nguyen, CT, Zhang, J, Liang, S, Bui, XT, and Hoang, NB
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Machine Learning ,Soil ,Radar ,Water ,Environmental Sciences ,Algorithms - Abstract
A high-resolution soil moisture prediction method has recently gained its importance in various fields such as forestry, agricultural and land management. However, accurate, robust and non- cost prohibitive spatially monitoring of soil moisture is challenging. In this research, a new approach involving the use of advance machine learning (ML) models, and multi-sensor data fusion including Sentinel-1(S1) C-band dual polarimetric synthetic aperture radar (SAR), Sentinel-2 (S2) multispectral data, and ALOS Global Digital Surface Model (ALOS DSM) to predict precisely soil moisture at 10 m spatial resolution across research areas in Australia. The total of 52 predictor variables generated from S1, S2 and ALOS DSM data fusion, including vegetation indices, soil indices, water index, SAR transformation indices, ALOS DSM derived indices like digital model elevation (DEM), slope, and topographic wetness index (TWI). The field soil data from Western Australia was employed. The performance capability of extreme gradient boosting regression (XGBR) together with the genetic algorithm (GA) optimizer for features selection and optimization for soil moisture prediction in bare lands was examined and compared with various scenarios and ML models. The proposed model (the XGBR-GA model) with 21 optimal features obtained from GA was yielded the highest performance (R2 = 0. 891; RMSE = 0.875%) compared to random forest regression (RFR), support vector machine (SVM), and CatBoost gradient boosting regression (CBR). Conclusively, the new approach using the XGBR-GA with features from combination of reliable free-of-charge remotely sensed data from Sentinel and ALOS imagery can effectively estimate the spatial variability of soil moisture. The described framework can further support precision agriculture and drought resilience programs via water use efficiency and smart irrigation management for crop production.
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- 2022
19. Recent advances in circular bioeconomy based clean technologies for sustainable environment
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Deng, L, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Pandey, A, Varjani, S, and Hoang, NB
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0905 Civil Engineering, 0907 Environmental Engineering - Abstract
The term “circular bioeconomy-based clean technologies” has attracted global attention in recent years, and it now plays an important role in solving issues of increasing biowaste generation, resource scarcity and climate change. This is in line with creating a sustainable environment. Regarding circular bioeconomy-based technologies, wastewaters and solid biowastes are treated as potential and renewable feedstocks for producing value-added resources and bioenergy. Bioelectrochemical systems (BES) are promising technologies for the treatment of wastewater and conversion of wastes to bioenergy and resources by microbial fuel cells (MFCs) and microbial electrolysis cells (MECs). Biowastes from various sectors, including organic fraction of municipal solid waste, agricultural residues, animal manure, food wastes and sewage sludge, can be converted to biochar, biofuel and other valuable products via thermochemical technologies. This research explains some representative circular bioeconomy based technologies for the treatment of wastewater and biowastes while focusing on the impact of these technologies and products on environmental sustainability.
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- 2022
20. Telehealth voice assessment by speech language pathologists during a global pandemic using principles of a primary contact model: an observational cohort study protocol
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Payten, CL, Nguyen, DD, Novakovic, D, O'Neill, J, Chacon, AM, Weir, KA, Madill, CJ, Payten, CL, Nguyen, DD, Novakovic, D, O'Neill, J, Chacon, AM, Weir, KA, and Madill, CJ
- Abstract
INTRODUCTION: SARS-CoV-2, a highly contagious severe acute respiratory syndrome, has spread to most countries in the world and resulted in a change to practice patterns for the assessment and diagnosis of people with voice disorders. Many services are transitioning to telehealth models to maintain physical distancing measures and conserve personal protective equipment used by healthcare workers during laryngoscopy examinations. The speech-language pathology primary contact (SLPPC) assessment for patients referred to ear, nose and throat (ENT) services in Australia has been shown to reduce waiting times for assessment while streamlining access to ENT assessment and allied health practitioner treatment pathways. METHODS AND ANALYSIS: A prospective observational cohort study will see patients in a newly developed telehealth model which uses the principles from a usual care SLPPC assessment protocol. Participants will be offered an initial telehealth assessment (speech-language pathology primary contact telehealth (SLPPC-T)) prior to being prioritised for a face-to-face laryngoscopy assessment to complete the diagnostic process. The telehealth assessment will collect sociodemographic information, personal and family medical history, key symptoms, onset and variability of symptoms, red-flag signs or symptoms for laryngeal malignancy, and clinical voice assessment data for auditory-perceptual and acoustic analysis. The study outcomes include (1) association of signs, symptoms and specific voice measures collected during SLPPC-T with voice disorder classification provided after laryngoscopy; (2) degree of concordance between voice disorder classification after SLPPC-T and after laryngoscopy; (3) health service and patient-related costs and health outcomes of the SLPPC-T; (4) patient and stakeholder views and beliefs about the SLPPC-T process. ETHICS AND DISSEMINATION: Ethical approval has been granted prior to commencement of the study enrolment by the Gold Coast Hospital
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- 2022
21. Developing a new approach for design support of subsurface constructed wetland using machine learning algorithms.
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Nguyen, XC, Nguyen, TTH, Le, QV, Le, PC, Srivastav, AL, Pham, QB, Nguyen, PM, La, DD, Rene, ER, Ngo, HH, Chang, SW, Nguyen, DD, Nguyen, XC, Nguyen, TTH, Le, QV, Le, PC, Srivastav, AL, Pham, QB, Nguyen, PM, La, DD, Rene, ER, Ngo, HH, Chang, SW, and Nguyen, DD
- Abstract
Knowing the effluent quality of treatment systems in advance to enable the design of treatment systems that comply with environmental standards is a realistic strategy. This study aims to develop machine learning - based predictive models for designing the subsurface constructed wetlands (SCW). Data from the SCW literature during the period of 2009-2020 included 618 sets and 10 features. Five algorithms namely, Random forest, Classification and Regression trees, Support vector machines, K-nearest neighbors, and Cubist were compared to determine an optimal algorithm. All nine input features including the influent concentrations, C:N ratio, hydraulic loading rate, height, aeration, flow type, feeding, and filter type were confirmed as relevant features for the predictive algorithms. The comparative result revealed that Cubist is the best algorithm with the lowest RMSE (7.77 and 21.77 mg.L-1 for NH4-N and COD, respectively) corresponding to 84% of the variance in the effluents explained. The coefficient of determination of the Cubist algorithm obtained for NH4-N and COD prediction from the test data were 0.92 and 0.93, respectively. Five case studies of the application of SCW design were also exercised and verified by the prediction model. Finally, a fully developed Cubist algorithm-based design tool for SCW was proposed.
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- 2022
22. Volatile fatty acids production from waste streams by anaerobic digestion: A critical review of the roles and application of enzymes.
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Feng, S, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Liu, Y, Zhang, S, Phong Vo, HN, Bui, XT, Ngoc Hoang, B, Feng, S, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Liu, Y, Zhang, S, Phong Vo, HN, Bui, XT, and Ngoc Hoang, B
- Abstract
Volatile fatty acids (VFAs) produced from organic-rich wastewater by anaerobic digestion attract attention due to the increasing volatile fatty acids market, sustainability and environmentally friendly characteristics. This review aims to give an overview of the roles and applications of enzymes, a biocatalyst which plays a significant role in anaerobic digestion, to enhance volatile fatty acids production. This paper systematically overviewed: (i) the enzymatic pathways of VFAs formation, competition, and consumption; (ii) the applications of enzymes in VFAs production; and (iii) feasible measures to boost the enzymatic processes. Furthermore, this review presents a critical evaluation on the major obstacles and feasible future research directions for the better applications of enzymatic processes to promote VFAs production from wastewater.
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- 2022
23. Advanced strategies for enhancing dark fermentative biohydrogen production from biowaste towards sustainable environment.
- Author
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Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Deng, L, Chen, Z, Ye, Y, Bui, XT, Hoang, NB, Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Deng, L, Chen, Z, Ye, Y, Bui, XT, and Hoang, NB
- Abstract
As a clean energy carrier, hydrogen is a promising alternative to fossil fuel so as the global growing energy demand can be met. Currently, producing hydrogen from biowastes through fermentation has attracted much attention due to its multiple advantages of biowastes management and valuable energy generation. Nevertheless, conventional dark fermentation (DF) processes are still hindered by the low biohydrogen yields and challenges of biohydrogen purification, which limit their commercialization. In recent years, researchers have focused on various advanced strategies for enhancing biohydrogen yields, such as screening of super hydrogen-producing bacteria, genetic engineering, cell immobilization, nanomaterials utilization, bioreactors modification, and combination of different processes. This paper critically reviews by discussing the above stated technologies employed in DF, respectively, to improve biohydrogen generation and stating challenges and future perspectives on biowaste-based biohydrogen production.
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- 2022
24. Preface
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Bui, XT, Nguyen, DD, Nguyen, PD, Ngo, HH, Pandey, A, Bui, XT, Nguyen, DD, Nguyen, PD, Ngo, HH, and Pandey, A
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- 2022
25. Artificial intelligence for wastewater treatment
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Nguyen, XC, Nguyen, TTH, Tran, QB, Bui, XT, Ngo, HH, Nguyen, DD, Nguyen, XC, Nguyen, TTH, Tran, QB, Bui, XT, Ngo, HH, and Nguyen, DD
- Abstract
Wastewater treatment is a complex system for which a vast amount of data has been generated through online sensors, providing the opportunity for applying artificial intelligence (AI) to improve the performance of the system. Applied AI was found to demonstrate a better potential for data analysis than conventional statistical assessment. This chapter outlines state-of-the-art development in the use of applied AI for wastewater treatment plants (WWTPs) with a focus on output, algorithms, data, and performance. Real applications of AI in WWTPs include prediction, soft sensors, intelligence control and optimization, and detection. This paper could therefore help environmental scientists, wastewater engineers, and practitioners in the better control and operation of WWTPs.
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- 2022
26. Biological wastewater treatment systems: an overview
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Bui, X-T, Nguyen, DD, Le, L-T, Nguyen, Q-H, Nguyen, P-D, Ngo, HH, Pandey, A, Bui, X-T, Nguyen, DD, Le, L-T, Nguyen, Q-H, Nguyen, P-D, Ngo, HH, and Pandey, A
- Abstract
Overpopulation, industrialization, and unregulated discharge result in the occurrence of the contaminants in water bodies, which calls for treatment technologies. Biological wastewater treatment is a technology where the main objective is to transform dissolved and particulate biodegradable constituents into acceptable end products. Biological treatment technologies are cost-effective, efficient, and many of them offer water reclamation qualities. Many pieces of research have been made to improve the removal of contaminants, trace compounds, operating conditions, and large-scale application. This chapter delivers an overview of biological wastewater treatment systems and highlights the future potential.
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- 2022
27. Converting biomass of agrowastes and invasive plant into alternative materials for water remediation
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Nguyen, TTH, Nguyen, XC, Nguyen, DLT, Nguyen, DD, Vo, TYB, Vo, QN, Nguyen, TD, Ly, QV, Ngo, HH, Vo, DVN, Nguyen, TP, Kim, IT, Van Le, Q, Nguyen, TTH, Nguyen, XC, Nguyen, DLT, Nguyen, DD, Vo, TYB, Vo, QN, Nguyen, TD, Ly, QV, Ngo, HH, Vo, DVN, Nguyen, TP, Kim, IT, and Van Le, Q
- Abstract
Three types of biomass of invasive plants and agrowastes, namely, the wattle bark of Acacia auriculiformis (BA), mimosa (BM), and coffee husks (BC), were converted into biochars through slow pyrolysis and investigated for their ability to remove dyes in water. The properties of the materials were characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) analysis. The BET surface area (total pore volume) of BC was 2.62 m2/g (0.007 cm3/g), far below those of BA and BM with 393.15 cm2/g (0.195 m3/g) and 285.53 cm2/g (0.153 m3/g), respectively. The optimal adsorption doses for the removal of methylene blue (MB) were found to be 2, 5, and 5 g/L for BC, BA, and BM, respectively. The suitable pH ranges for MB removal were 6–12 for BA, 7–12 for BC, and 2–10 for BM. The majority of MB (over 83%) was removed in the initial 30 min, followed by a more quasisteady state condition after the removal rate exceeded 90%. The experimental data were fitted with the kinetic models (PFO, PSO, Bangham, IDP), indicating that physicochemical adsorption, pore diffusion process, and multiple stages are the dominant mechanisms for the MB adsorption onto biochars. Finally, BA and BM showed similar adsorption efficiencies, while BC may not be favorable for use as an adsorbent due to its low surface area and low pore volume.
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- 2022
28. Bio-membrane integrated systems for nitrogen recovery from wastewater in circular bioeconomy.
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Ye, Y, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Varjani, S, Liu, Q, Bui, XT, Hoang, NB, Ye, Y, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Varjani, S, Liu, Q, Bui, XT, and Hoang, NB
- Abstract
Wastewater contains a significant amount of recoverable nitrogen. Hence, the recovery of nitrogen from wastewater can provide an option for generating some revenue by applying the captured nitrogen to producing bio-products, in order to minimize dangerous or environmental pollution consequences. The circular bio-economy can achieve greater environmental and economic sustainability through game-changing technological developments that will improve municipal wastewater management, where simultaneous nitrogen and energy recovery are required. Over the last decade, substantial efforts were undertaken concerning the recovery of nitrogen from wastewater. For example, bio-membrane integrated system (BMIS) which integrates biological process and membrane technology, has attracted considerable attention for recovering nitrogen from wastewater. In this review, current research on nitrogen recovery using the BMIS are compiled whilst the technologies are compared regarding their energy requirement, efficiencies, advantages and disadvantages. Moreover, the bio-products achieved in the nitrogen recovery system processes are summarized in this paper, and the directions for future research are suggested. Future research should consider the quality of recovered nitrogenous products, long-term performance of BMIS and economic feasibility of large-scale reactors. Nitrogen recovery should be addressed under the framework of a circular bio-economy.
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- 2022
29. Circular bioeconomy for resource recovery from wastewaters using algae-based technologies
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Ngo, HH, Nguyen, TT, Guo, W, Nguyen, DD, Pandey, A, Bui, XT, Varjani, S, Dan Nguyen, P, Nguyen, TTN, Ngo, HH, Nguyen, TT, Guo, W, Nguyen, DD, Pandey, A, Bui, XT, Varjani, S, Dan Nguyen, P, and Nguyen, TTN
- Abstract
The circular bioeconomy is emerging as a new concept within the scientific community, which is attempting to help create sustainable economic development. The general aim of circular bioeconomy is to obtain sustainability through reduction, reuse, recycling, and recovery practices using bio-based resources. Recovery of nutrients from secondary sources is a key way to address the increased demands on resources by an exponentially rising world population growth. Wastewater is a source of nitrogen, phosphorous, and other nutrients necessary for various industries. Microalgae when harnessed with technology are considered to enable to recover nutrients from wastewaters through processes of growth and biomass production. This chapter describes the overview of bio-circular economy using microalgae, the potential of using algae-based technologies for resource recovery from wastewaters and making a circular bioeconomy viable. Challenges and future perspectives of these technologies are also explained.
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- 2022
30. Impact factors and novel strategies for improving biohydrogen production in microbial electrolysis cells.
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Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Zhang, S, Deng, S, An, D, Hoang, NB, Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Zhang, S, Deng, S, An, D, and Hoang, NB
- Abstract
Microbial electrolysis cell (MEC) system is an environmentally friendly method for clean biohydrogen production from a wide range of biowastes owing to low greenhouse gas emissions. This approach has relatively higher yields and lower energy costs for biohydrogen production compared to conventional biological technologies and direct water electrolysis, respectively. However, biohydrogen production efficiency and operating costs of MEC still need further optimization to realize its large-scale application.This paper provides a unique review of impact factors influencing biohydrogen production in MECs, such as microorganisms and electrodes. Novel strategies, including inhibition of methanogens, development of novel cathode catalyst, advanced reactor design and integrated systems, to enhance low-cost biohydrogen production, are discussed based on recent publications in terms of their opportunities, bottlenecks and future directions. In addition, the current challenges, and effective future perspectives towards the practical application of MECs are described in this review.
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- 2022
31. 113 - What the BRASH?
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Nguyen, DD, Qureshi, H, Olejniczak, MK, Sanne, S, and McCarron, R
- Published
- 2024
- Full Text
- View/download PDF
32. 136 - The intersection between hematology-oncology and rheumatology: hemophagocytic lymphohistiocytosis and macrophage activation syndrome in the setting of neutropenic fever
- Author
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Tran, JA, Tran, J, Nguyen, DD, Campbell, L, Germain, M, and Sanne, S
- Published
- 2024
- Full Text
- View/download PDF
33. 112 - Parkinsonism-hyperpyrexia syndrome: a case report emphasizing early recognition and management in Parkinson’s disease
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Nguyen, DD, Rader, H, Coe, BA, Bell, M, Sanne, S, and McCarron, R
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- 2024
- Full Text
- View/download PDF
34. Impact factors and novel strategies for improving biohydrogen production in microbial electrolysis cells
- Author
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Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Zhang, S, Deng, S, An, D, and Hoang, NB
- Subjects
Bioelectric Energy Sources ,Electrodes ,Catalysis ,Electrolysis ,Biotechnology ,Hydrogen - Abstract
Microbial electrolysis cell (MEC) system is an environmentally friendly method for clean biohydrogen production from a wide range of biowastes owing to low greenhouse gas emissions. This approach has relatively higher yields and lower energy costs for biohydrogen production compared to conventional biological technologies and direct water electrolysis, respectively. However, biohydrogen production efficiency and operating costs of MEC still need further optimization to realize its large-scale application.This paper provides a unique review of impact factors influencing biohydrogen production in MECs, such as microorganisms and electrodes. Novel strategies, including inhibition of methanogens, development of novel cathode catalyst, advanced reactor design and integrated systems, to enhance low-cost biohydrogen production, are discussed based on recent publications in terms of their opportunities, bottlenecks and future directions. In addition, the current challenges, and effective future perspectives towards the practical application of MECs are described in this review.
- Published
- 2021
35. A dual chamber microbial fuel cell based biosensor for monitoring copper and arsenic in municipal wastewater
- Author
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Do, MH, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Pandey, A, Sharma, P, Varjani, S, Nguyen, TAH, and Hoang, NB
- Subjects
Electricity ,Bioelectric Energy Sources ,Waste Water ,Biosensing Techniques ,Wastewater ,Electrodes ,Environmental Sciences ,Copper ,Arsenic - Abstract
This study investigated a dual-chamber microbial fuel cell-based biosensor (DC-MFC-B) for monitoring copper and arsenic in municipal wastewater. Operational conditions, including pH, flow rate, a load of organic substrate and external resistance load, were optimized to improve the biosensor's sensitivity. The DC-MFC-B's toxicity response was established under the electroactive bacteria inhibition rate function to a specific heavy metal level as well as the recovery of the DC-MFC-B. Results show that the DC-MFC-B was optimized at the operating conditions of 1000 Ω external resistance, COD 300 mg L-1 and 50 mM K3Fe(CN)6 as a catholyte solution. The voltage output of the DC-MFC-B decreased with increasing in the copper and arsenic concentrations. A significant linear relationship between the maximum voltage of the biosensor and the heavy metal concentration was obtained with a coefficient of R2 = 0.989 and 0.982 for copper and arsenic, respectively. The study could detect copper (1-10 mg L-1) and arsenic (0.5-5 mg L-1) over wider range compared to other studies. The inhibition ratio for both copper and arsenic was proportional to the concentrations, indicating the electricity changes are mainly dependent on the activity of the electrogenic bacteria on the anode surface. Moreover, the DC-MFC-B was also recovered in few hours after being cleaned with a fresh medium. It was found that the concentration of the toxicant effected on the recovery time and the recovery time was varied between 4 and 12 h. In short, this work provided new avenues for the practical application of microbial fuel cells as a heavy metal biosensor.
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- 2021
36. Bio-membrane integrated systems for nitrogen recovery from wastewater in circular bioeconomy
- Author
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Ye, Y, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Varjani, S, Liu, Q, Bui, XT, and Hoang, NB
- Subjects
Nitrogen ,Meteorology & Atmospheric Sciences ,Waste Water ,Wastewater ,Environmental Sciences - Abstract
Wastewater contains a significant amount of recoverable nitrogen. Hence, the recovery of nitrogen from wastewater can provide an option for generating some revenue by applying the captured nitrogen to producing bio-products, in order to minimize dangerous or environmental pollution consequences. The circular bio-economy can achieve greater environmental and economic sustainability through game-changing technological developments that will improve municipal wastewater management, where simultaneous nitrogen and energy recovery are required. Over the last decade, substantial efforts were undertaken concerning the recovery of nitrogen from wastewater. For example, bio-membrane integrated system (BMIS) which integrates biological process and membrane technology, has attracted considerable attention for recovering nitrogen from wastewater. In this review, current research on nitrogen recovery using the BMIS are compiled whilst the technologies are compared regarding their energy requirement, efficiencies, advantages and disadvantages. Moreover, the bio-products achieved in the nitrogen recovery system processes are summarized in this paper, and the directions for future research are suggested. Future research should consider the quality of recovered nitrogenous products, long-term performance of BMIS and economic feasibility of large-scale reactors. Nitrogen recovery should be addressed under the framework of a circular bio-economy.
- Published
- 2021
37. Developing a new approach for design support of subsurface constructed wetland using machine learning algorithms
- Author
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Nguyen, XC, Nguyen, TTH, Le, QV, Le, PC, Srivastav, AL, Pham, QB, Nguyen, PM, La, DD, Rene, ER, Ngo, HH, Chang, SW, and Nguyen, DD
- Subjects
Machine Learning ,Nitrogen ,Wetlands ,Environmental Sciences ,Algorithms - Abstract
Knowing the effluent quality of treatment systems in advance to enable the design of treatment systems that comply with environmental standards is a realistic strategy. This study aims to develop machine learning - based predictive models for designing the subsurface constructed wetlands (SCW). Data from the SCW literature during the period of 2009-2020 included 618 sets and 10 features. Five algorithms namely, Random forest, Classification and Regression trees, Support vector machines, K-nearest neighbors, and Cubist were compared to determine an optimal algorithm. All nine input features including the influent concentrations, C:N ratio, hydraulic loading rate, height, aeration, flow type, feeding, and filter type were confirmed as relevant features for the predictive algorithms. The comparative result revealed that Cubist is the best algorithm with the lowest RMSE (7.77 and 21.77 mg.L-1 for NH4-N and COD, respectively) corresponding to 84% of the variance in the effluents explained. The coefficient of determination of the Cubist algorithm obtained for NH4-N and COD prediction from the test data were 0.92 and 0.93, respectively. Five case studies of the application of SCW design were also exercised and verified by the prediction model. Finally, a fully developed Cubist algorithm-based design tool for SCW was proposed.
- Published
- 2021
38. New TiO2-doped Cu-Mg spinel-ferrite-based photocatalyst for degrading highly toxic rhodamine B dye in wastewater
- Author
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Tran, CV, La, DD, Thi Hoai, PN, Ninh, HD, Thi Hong, PN, Vu, THT, Nadda, AK, Nguyen, XC, Nguyen, DD, and Ngo, HH
- Subjects
Titanium ,03 Chemical Sciences, 05 Environmental Sciences, 09 Engineering ,Strategic, Defence & Security Studies ,Rhodamines ,Aluminum Oxide ,Waste Water ,Magnesium Oxide ,Ferric Compounds ,Catalysis - Abstract
The quest for finding an effective photocatalyst for environmental remediation and treatment strategies is attracting considerable attentions from scientists. In this study, a new hybrid material, Cu0.5Mg0.5Fe2O4-TiO2, was designed and fabricated using coprecipitation and sol-gel approaches for degrading organic dyes in wastewater. The prepared hybrid materials were fully characterized using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The results revealed that the Cu0.5Mg0.5Fe2O4-TiO2 hybrid material was successfully synthesized with average particle sizes of 40.09 nm for TiO2 and 27.9 nm for Cu0.5Mg0.5Fe2O4. As the calculated bandgap energy of the hybrid material was approximately 2.86 eV, it could harvest photon energy in the visible region. Results indicate that the Cu0.5Mg0.5Fe2O4-TiO2 also had reasonable magnetic properties with a saturation magnetization value of 11.2 emu/g, which is a level of making easy separation from the solution by an external magnet. The resultant Cu0.5Mg0.5Fe2O4-TiO2 hybrid material revealed better photocatalytic performance for rhodamine B dye (consistent removal rate in the 13.96 × 10-3 min-1) compared with free-standing Cu0.5Mg0.5Fe2O4 and TiO2 materials. The recyclability and photocatalytic mechanism of Cu0.5Mg0.5Fe2O4-TiO2 are also well discussed.
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- 2021
39. Performance of a dual-chamber microbial fuel cell as biosensor for on-line measuring ammonium nitrogen in synthetic municipal wastewater
- Author
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Do, MH, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Sharma, P, Pandey, A, Bui, XT, and Zhang, X
- Subjects
Electricity ,Nitrogen ,Bioelectric Energy Sources ,Ammonium Compounds ,Reproducibility of Results ,Waste Water ,Biosensing Techniques ,Electrodes ,Environmental Sciences - Abstract
This study investigates the performance of microbial fuel cells (MFC) for on-line monitoring ammonium (NH4+-N) in municipal wastewater. A double chamber microbial fuel cell (MFC) was established in a continuous mode under different influent ammonium concentrations ranging from 5 to 40 mg L-1. Results indicated that excess ammonium would inhibit the activity of electrogenic bacteria in the anode chamber and consequently affect electricity production. An inversely linear relationship between concentration and voltage generation was obtained with coefficient R2 0.99 and the MFC could detect up to 40 mg L-1 of NH4+-N. Notably, no further decline was observed in voltage output and there was in fact a further increase in ammonia concentration (>40 mg L-1). The stability and high accuracy of ammonium-based MFC biosensors exposed competitive results compared to traditional analytical tools, confirming the biosensor's reliability. Furthermore, pH 7.0; R 1000 Ω and HRT of 24 h are the best possible conditions for the MFC biosensor for monitoring ammonium. The simplicity in design and operation makes the biosensor more realistic for practical application.
- Published
- 2021
40. Environmental impacts and greenhouse gas emissions assessment for energy recovery and material recycle of the wastewater treatment plant
- Author
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Nguyen, TKL, Ngo, HH, Guo, W, Nguyen, TLH, Chang, SW, Nguyen, DD, Varjani, S, Lei, Z, and Deng, L
- Subjects
Environmental Sciences - Published
- 2021
41. Review on pretreatment techniques to improve anaerobic digestion of sewage sludge
- Author
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Khanh Nguyen, V, Kumar Chaudhary, D, Hari Dahal, R, Hoang Trinh, N, Kim, J, Chang, SW, Hong, Y, Duc La, D, Nguyen, XC, Hao Ngo, H, Chung, WJ, and Nguyen, DD
- Subjects
Energy ,0306 Physical Chemistry (incl. Structural), 0904 Chemical Engineering, 0913 Mechanical Engineering - Abstract
Anaerobic digestion (AD) of sewage sludge is one of the most efficient, effective, and environmentally sustainable remediation techniques; however, the presence of complex floc structures, hard cell walls, and large amounts of molecular organic matter in the sludge hinder AD hydrolysis. Consequently, sewage sludge pretreatment is a prerequisite to accelerate hydrolysis and improve AD efficiency. This review focuses on pretreatment techniques for improving sewage sludge AD, which include mechanical, chemical, thermal, and biological processes. The various pretreatment process effects are discussed in terms of advantages and disadvantages, including their effectiveness, and recent achievements are reviewed for improved biogas production.
- Published
- 2021
42. Sustainable enzymatic technologies in waste animal fat and protein management
- Author
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Cheng, D, Liu, Y, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Zhang, S, Luo, G, and Bui, XT
- Subjects
Fats ,Waste Management ,Biofuels ,Animals ,Industrial Waste ,Food Industry ,Environmental Sciences ,Biotechnology - Abstract
Waste animal fats and proteins (WAFP) are rich in various animal by-products from food industries. On one hand, increasing production of huge amounts of WAFP brings a great challenge to their appropriate disposal, and raises severe risks to environment and life health. On the other hand, the high fat and protein contents in these animal wastes are valuable resources which can be reutilized in an eco-friendly and renewable way. Sustainable enzymatic technologies are promising methods for WAFP management. This review discussed the application of various enzymes in the conversion of WSFP to value-added biodiesel and bioactivate hydrolysates. New biotechnologies to discover novel enzymes with robust properties were proposed as well. This paper also presented the bio-utilization strategy of animal fat and protein wastes as alternative nutrient media for microorganism growth activities to yield important industrial enzymes cost-effectively.
- Published
- 2021
43. Virtual Histology of Cortical Thickness and Shared Neurobiology in 6 Psychiatric Disorders
- Author
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Patel, Y, Parker, N, Shin, J, Howard, D, French, L, Thomopoulos, SI, Pozzi, E, Abe, Y, Abe, C, Anticevic, A, Alda, M, Aleman, A, Alloza, C, Alonso-Lana, S, Ameis, SH, Anagnostou, E, McIntosh, AA, Arango, C, Arnold, PD, Asherson, P, Assogna, F, Auzias, G, Ayesa-Arriola, R, Bakker, G, Banaj, N, Banaschewski, T, Bandeira, CE, Baranov, A, Bargallo, N, Bau, CHD, Baumeister, S, Baune, BT, Bellgrove, MA, Benedetti, F, Bertolino, A, Boedhoe, PSW, Boks, M, Bollettini, I, del Mar Bonnin, C, Borgers, T, Borgwardt, S, Brandeis, D, Brennan, BP, Bruggemann, JM, Bulow, R, Busatto, GF, Calderoni, S, Calhoun, VD, Calvo, R, Canales-Rodriguez, EJ, Cannon, DM, Carr, VJ, Cascella, N, Cercignani, M, Chaim-Avancini, TM, Christakou, A, Coghill, D, Conzelmann, A, Crespo-Facorro, B, Cubillo, AI, Cullen, KR, Cupertino, RB, Daly, E, Dannlowski, U, Davey, CG, Denys, D, Deruelle, C, Di Giorgio, A, Dickie, EW, Dima, D, Dohm, K, Ehrlich, S, Ely, BA, Erwin-Grabner, T, Ethofer, T, Fair, DA, Fallgatter, AJ, Faraone, SV, Fatjo-Vilas, M, Fedor, JM, Fitzgerald, KD, Ford, JM, Frodl, T, Fu, CHY, Fullerton, JM, Gabel, MC, Glahn, DC, Roberts, G, Gogberashvili, T, Goikolea, JM, Gotlib, IH, Goya-Maldonado, R, Grabe, HJ, Green, MJ, Grevet, EH, Groenewold, NA, Grotegerd, D, Gruber, O, Gruner, P, Guerrero-Pedraza, A, Gur, RE, Gur, RC, Haar, S, Haarman, BCM, Haavik, J, Hahn, T, Hajek, T, Harrison, BJ, Harrison, NA, Hartman, CA, Whalley, HC, Heslenfeld, DJ, Hibar, DP, Hilland, E, Hirano, Y, Ho, TC, Hoekstra, PJ, Hoekstra, L, Hohmann, S, Hong, LE, Hoschl, C, Hovik, MF, Howells, FM, Nenadic, I, Jalbrzikowski, M, James, AC, Janssen, J, Jaspers-Fayer, F, Xu, J, Jonassen, R, Karkashadze, G, King, JA, Kircher, T, Kirschner, M, Koch, K, Kochunov, P, Kohls, G, Konrad, K, Kramer, B, Krug, A, Kuntsi, J, Kwon, JS, Landen, M, Landro, NI, Lazaro, L, Lebedeva, IS, Leehr, EJ, Lera-Miguel, S, Lesch, K-P, Lochner, C, Louza, MR, Luna, B, Lundervold, AJ, MacMaster, FP, Maglanoc, LA, Malpas, CB, Portella, MJ, Marsh, R, Martyn, FM, Mataix-Cols, D, Mathalon, DH, McCarthy, H, McDonald, C, McPhilemy, G, Meinert, S, Menchon, JM, Minuzzi, L, Mitchell, PB, Moreno, C, Morgado, P, Muratori, F, Murphy, CM, Murphy, D, Mwangi, B, Nabulsi, L, Nakagawa, A, Nakamae, T, Namazova, L, Narayanaswamy, J, Jahanshad, N, Nguyen, DD, Nicolau, R, O'Gorman Tuura, RL, O'Hearn, K, Oosterlaan, J, Opel, N, Ophoff, RA, Oranje, B, Garcia de la Foz, VO, Overs, BJ, Paloyelis, Y, Pantelis, C, Parellada, M, Pauli, P, Pico-Perez, M, Picon, FA, Piras, F, Plessen, KJ, Pomarol-Clotet, E, Preda, A, Puig, O, Quide, Y, Radua, J, Ramos-Quiroga, JA, Rasser, PE, Rauer, L, Reddy, J, Redlich, R, Reif, A, Reneman, L, Repple, J, Retico, A, Richarte, V, Richter, A, Rosa, PGP, Rubia, KK, Hashimoto, R, Sacchet, MD, Salvador, R, Santonja, J, Sarink, K, Sarro, S, Satterthwaite, TD, Sawa, A, Schall, U, Schofield, PR, Schrantee, A, Seitz, J, Serpa, MH, Setien-Suero, E, Shaw, P, Shook, D, Silk, TJ, Sim, K, Simon, S, Simpson, HB, Singh, A, Skoch, A, Skokauskas, N, Soares, JC, Soreni, N, Soriano-Mas, C, Spalletta, G, Spaniel, F, Lawrie, SM, Stern, ER, Stewart, SE, Takayanagi, Y, Temmingh, HS, Tolin, DF, Tomecek, D, Tordesillas-Gutierrez, D, Tosetti, M, Uhlmann, A, van Amelsvoort, T, van der Wee, NJA, van der Werff, SJA, van Haren, NEM, van Wingen, GA, Vance, A, Vazquez-Bourgon, J, Vecchio, D, Venkatasubramanian, G, Vieta, E, Vilarroya, O, Vives-Gilabert, Y, Voineskos, AN, Volzke, H, von Polier, GG, Walton, E, Weickert, TW, Weickert, CS, Weideman, AS, Wittfeld, K, Wolf, DH, Wu, M-J, Yang, TT, Yang, K, Yoncheva, Y, Yun, J-Y, Cheng, Y, Zanetti, MV, Ziegler, GC, Franke, B, Hoogman, M, Buitelaar, JK, van Rooij, D, Andreassen, OA, Ching, CRK, Veltman, DJ, Schmaal, L, Stein, DJ, van den Heuvel, OA, Turner, JA, van Erp, TGM, Pausova, Z, Thompson, PM, Paus, T, Patel, Y, Parker, N, Shin, J, Howard, D, French, L, Thomopoulos, SI, Pozzi, E, Abe, Y, Abe, C, Anticevic, A, Alda, M, Aleman, A, Alloza, C, Alonso-Lana, S, Ameis, SH, Anagnostou, E, McIntosh, AA, Arango, C, Arnold, PD, Asherson, P, Assogna, F, Auzias, G, Ayesa-Arriola, R, Bakker, G, Banaj, N, Banaschewski, T, Bandeira, CE, Baranov, A, Bargallo, N, Bau, CHD, Baumeister, S, Baune, BT, Bellgrove, MA, Benedetti, F, Bertolino, A, Boedhoe, PSW, Boks, M, Bollettini, I, del Mar Bonnin, C, Borgers, T, Borgwardt, S, Brandeis, D, Brennan, BP, Bruggemann, JM, Bulow, R, Busatto, GF, Calderoni, S, Calhoun, VD, Calvo, R, Canales-Rodriguez, EJ, Cannon, DM, Carr, VJ, Cascella, N, Cercignani, M, Chaim-Avancini, TM, Christakou, A, Coghill, D, Conzelmann, A, Crespo-Facorro, B, Cubillo, AI, Cullen, KR, Cupertino, RB, Daly, E, Dannlowski, U, Davey, CG, Denys, D, Deruelle, C, Di Giorgio, A, Dickie, EW, Dima, D, Dohm, K, Ehrlich, S, Ely, BA, Erwin-Grabner, T, Ethofer, T, Fair, DA, Fallgatter, AJ, Faraone, SV, Fatjo-Vilas, M, Fedor, JM, Fitzgerald, KD, Ford, JM, Frodl, T, Fu, CHY, Fullerton, JM, Gabel, MC, Glahn, DC, Roberts, G, Gogberashvili, T, Goikolea, JM, Gotlib, IH, Goya-Maldonado, R, Grabe, HJ, Green, MJ, Grevet, EH, Groenewold, NA, Grotegerd, D, Gruber, O, Gruner, P, Guerrero-Pedraza, A, Gur, RE, Gur, RC, Haar, S, Haarman, BCM, Haavik, J, Hahn, T, Hajek, T, Harrison, BJ, Harrison, NA, Hartman, CA, Whalley, HC, Heslenfeld, DJ, Hibar, DP, Hilland, E, Hirano, Y, Ho, TC, Hoekstra, PJ, Hoekstra, L, Hohmann, S, Hong, LE, Hoschl, C, Hovik, MF, Howells, FM, Nenadic, I, Jalbrzikowski, M, James, AC, Janssen, J, Jaspers-Fayer, F, Xu, J, Jonassen, R, Karkashadze, G, King, JA, Kircher, T, Kirschner, M, Koch, K, Kochunov, P, Kohls, G, Konrad, K, Kramer, B, Krug, A, Kuntsi, J, Kwon, JS, Landen, M, Landro, NI, Lazaro, L, Lebedeva, IS, Leehr, EJ, Lera-Miguel, S, Lesch, K-P, Lochner, C, Louza, MR, Luna, B, Lundervold, AJ, MacMaster, FP, Maglanoc, LA, Malpas, CB, Portella, MJ, Marsh, R, Martyn, FM, Mataix-Cols, D, Mathalon, DH, McCarthy, H, McDonald, C, McPhilemy, G, Meinert, S, Menchon, JM, Minuzzi, L, Mitchell, PB, Moreno, C, Morgado, P, Muratori, F, Murphy, CM, Murphy, D, Mwangi, B, Nabulsi, L, Nakagawa, A, Nakamae, T, Namazova, L, Narayanaswamy, J, Jahanshad, N, Nguyen, DD, Nicolau, R, O'Gorman Tuura, RL, O'Hearn, K, Oosterlaan, J, Opel, N, Ophoff, RA, Oranje, B, Garcia de la Foz, VO, Overs, BJ, Paloyelis, Y, Pantelis, C, Parellada, M, Pauli, P, Pico-Perez, M, Picon, FA, Piras, F, Plessen, KJ, Pomarol-Clotet, E, Preda, A, Puig, O, Quide, Y, Radua, J, Ramos-Quiroga, JA, Rasser, PE, Rauer, L, Reddy, J, Redlich, R, Reif, A, Reneman, L, Repple, J, Retico, A, Richarte, V, Richter, A, Rosa, PGP, Rubia, KK, Hashimoto, R, Sacchet, MD, Salvador, R, Santonja, J, Sarink, K, Sarro, S, Satterthwaite, TD, Sawa, A, Schall, U, Schofield, PR, Schrantee, A, Seitz, J, Serpa, MH, Setien-Suero, E, Shaw, P, Shook, D, Silk, TJ, Sim, K, Simon, S, Simpson, HB, Singh, A, Skoch, A, Skokauskas, N, Soares, JC, Soreni, N, Soriano-Mas, C, Spalletta, G, Spaniel, F, Lawrie, SM, Stern, ER, Stewart, SE, Takayanagi, Y, Temmingh, HS, Tolin, DF, Tomecek, D, Tordesillas-Gutierrez, D, Tosetti, M, Uhlmann, A, van Amelsvoort, T, van der Wee, NJA, van der Werff, SJA, van Haren, NEM, van Wingen, GA, Vance, A, Vazquez-Bourgon, J, Vecchio, D, Venkatasubramanian, G, Vieta, E, Vilarroya, O, Vives-Gilabert, Y, Voineskos, AN, Volzke, H, von Polier, GG, Walton, E, Weickert, TW, Weickert, CS, Weideman, AS, Wittfeld, K, Wolf, DH, Wu, M-J, Yang, TT, Yang, K, Yoncheva, Y, Yun, J-Y, Cheng, Y, Zanetti, MV, Ziegler, GC, Franke, B, Hoogman, M, Buitelaar, JK, van Rooij, D, Andreassen, OA, Ching, CRK, Veltman, DJ, Schmaal, L, Stein, DJ, van den Heuvel, OA, Turner, JA, van Erp, TGM, Pausova, Z, Thompson, PM, and Paus, T
- Abstract
IMPORTANCE: Large-scale neuroimaging studies have revealed group differences in cortical thickness across many psychiatric disorders. The underlying neurobiology behind these differences is not well understood. OBJECTIVE: To determine neurobiologic correlates of group differences in cortical thickness between cases and controls in 6 disorders: attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), bipolar disorder (BD), major depressive disorder (MDD), obsessive-compulsive disorder (OCD), and schizophrenia. DESIGN, SETTING, AND PARTICIPANTS: Profiles of group differences in cortical thickness between cases and controls were generated using T1-weighted magnetic resonance images. Similarity between interregional profiles of cell-specific gene expression and those in the group differences in cortical thickness were investigated in each disorder. Next, principal component analysis was used to reveal a shared profile of group difference in thickness across the disorders. Analysis for gene coexpression, clustering, and enrichment for genes associated with these disorders were conducted. Data analysis was conducted between June and December 2019. The analysis included 145 cohorts across 6 psychiatric disorders drawn from the ENIGMA consortium. The numbers of cases and controls in each of the 6 disorders were as follows: ADHD: 1814 and 1602; ASD: 1748 and 1770; BD: 1547 and 3405; MDD: 2658 and 3572; OCD: 2266 and 2007; and schizophrenia: 2688 and 3244. MAIN OUTCOMES AND MEASURES: Interregional profiles of group difference in cortical thickness between cases and controls. RESULTS: A total of 12 721 cases and 15 600 controls, ranging from ages 2 to 89 years, were included in this study. Interregional profiles of group differences in cortical thickness for each of the 6 psychiatric disorders were associated with profiles of gene expression specific to pyramidal (CA1) cells, astrocytes (except for BD), and microglia (except for OCD); collectively, gene
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- 2021
44. Effect of calcium peroxide pretreatment on the remediation of sulfonamide antibiotics (SMs) by Chlorella sp.
- Author
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Vo, HNP, Ngo, HH, Guo, W, Nguyen, KH, Chang, SW, Nguyen, DD, Cheng, D, Bui, XT, Liu, Y, Zhang, X, Vo, HNP, Ngo, HH, Guo, W, Nguyen, KH, Chang, SW, Nguyen, DD, Cheng, D, Bui, XT, Liu, Y, and Zhang, X
- Abstract
This study investigated the effect of CaO2 pretreatment on sulfonamide antibiotics (SMs) remediation by Chlorella sp. Results showed that a CaO2 dose ranging from 0.05 to 0.1 g/g biomass was the best and led to higher SMs removal efficacy 5-10% higher than the control. The contributions made by cometabolism and CaO2 in SMs remediation were very similar. Bioassimilation could remove 24% of sulfadiazine (SDZ) and sulfamethazine (SMZ), and accounted for 38% of sulfamethoxazole (SMX) remediation. Pretreatment by CaO2 wielded a positive effect on microalgae. The extracellular polymeric substances (EPS) level of the CaO2 pretreatment microalgae was three times higher when subjected to non-pretreatment. For the long-term, pretreatment microalgae removed SMs 10-20% more than the non-pretreatment microalgae. Protein fractions of EPS in continuous operation produced up to 90 mg/L for cometabolism. For bioassimilation, SMX intensity of the pretreatment samples was 160-fold less than the non-treatment one. It indicated the CaO2 pretreatment has enhanced the biochemical function of the intracellular environment of microalgae. Peroxidase enzyme involved positively in the cometabolism and degradation of SMs to several metabolites including ring cleavage, hydroxylation and pterin-related conjugation.
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- 2021
45. Bio-membrane based integrated systems for nitrogen recovery in wastewater treatment: Current applications and future perspectives.
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Ye, Y, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Varjani, S, Ding, A, Bui, X-T, Nguyen, DP, Ye, Y, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Varjani, S, Ding, A, Bui, X-T, and Nguyen, DP
- Abstract
Nitrogen removal is crucial in wastewater treatment process as excessive nitrogen content could result in eutrophication and degradation of aquatic ecosystems. Moreover, to satisfy the fast-growing need of fertilizers due to an increase in human population, recovering nitrogen from wastewater is of the most sustainable approach. Currently, the membrane technique integrated with biological processes namely bio-membrane based integrated system (BMIS) is a promising technology for recovering nitrogen from wastewater, including osmotic membrane bioreactors, bioelectrochemical systems and membrane photobioreactors. In this review study, the nitrogen recovery in different BMHSs, the role of operational parameters and the nitrogen recovery mechanism were discussed. Apart from this, the implementation of nitrogen recovery at pilot- and full-scale was summarized. Perspectives on the major challenges and recommendations of the BMIS for the nitrogen recovery in wastewater treatment were proposed, in which the integrated technologies and more scale-up studies regarding nitrogen recovery by the BMISs were also highlighted and recommended.
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- 2021
46. Vertical flow constructed wetlands using expanded clay and biochar for wastewater remediation: A comparative study and prediction of effluents using machine learning
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Nguyen, XC, Ly, QV, Peng, W, Nguyen, V-H, Nguyen, DD, Tran, QB, Huyen Nguyen, TT, Sonne, C, Lam, SS, Ngo, HH, Goethals, P, Le, QV, Nguyen, XC, Ly, QV, Peng, W, Nguyen, V-H, Nguyen, DD, Tran, QB, Huyen Nguyen, TT, Sonne, C, Lam, SS, Ngo, HH, Goethals, P, and Le, QV
- Abstract
This study evaluated and compared the performance of two vertical flow constructed wetlands (VF) using expanded clay (VF1) and biochar (VF2), of which both are low-cost, eco-friendly, and exhibit potentially high adsorption as compared to conventional filter layers. Both VFs achieved relatively high removal for organic matters (i.e. Biological oxygen demand during 5 days, BOD5) and nitrogen, accounting for 9.5 - 10.5 g.BOD5.m-2.d-1 and 3.5 - 3.6 g.NH4-N.m-2.d-1, respectively. The different filter materials did not exert any significant discrepancy to effluent quality in terms of suspended solids, organic matters and NO3-N (P > 0.05), but they did influence NH4-N effluent as evidenced by the removal rate of that by VF1 and VF2 being of 82.4 ± 5.7 and 84.6 ± 6.4%, respectively (P < 0.05). The results obtained from the designed systems were further subject to machine learning to clarify the effecting factors and predict the effluents. The optimal algorithms were random forest, generalized linear model, and support vector machine. The values of the coefficient of determination (R2) and the root mean square error (RMSE) of whole fitting data achieved 74.0% and 5.0 mg.L-1, 80.0% and 0.3 mg.L-1, 90.1% and 2.9 mg.L-1, and 48.5% and 0.5 mg.L-1 for BOD5_VF1, NH4-N_VF1, BOD5_VF2, and NH4-N_VF2, respectively.
- Published
- 2021
47. Status of water use and potential of rainwater harvesting for replacing centralized supply system in remote mountainous areas: a case study.
- Author
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Nguyen, XC, Nguyen, TTH, Bui, X-T, Tran, XV, Tran, TCP, Hoang, NTT, La, DD, Chang, SW, Ngo, HH, Nguyen, DD, Nguyen, XC, Nguyen, TTH, Bui, X-T, Tran, XV, Tran, TCP, Hoang, NTT, La, DD, Chang, SW, Ngo, HH, and Nguyen, DD
- Abstract
The failure of the centralized water supply system forced XY community to become more dependent on uncertain and unstable water sources. The results of surveying 50 households showed that 89.18% of total households depended on water collected from rivers, which contributed 58.3% of the total water volume used for the domestic demands. The average water volume consumed was 19.5 liters/person/day (l/p/d), and 86.5% of households used more than one source; 13.5% of households collected water only from rivers, and 45.94% of families had rainwater harvesting (RWH) for their activities (domestic water demand); however, RWH only provided 9.9% of total water consumption. In this study, basic methods were applied to calculate the storage tanks necessary to balance the water deficit created by drought months. Three levels of water demand (14, 20, and 30 l/p/d) can be the best choices for RWH; for a higher demand (40 and 60 l/p/d), small roof area (30-40 m2), and many people (six to seven) per family, RWH might be impractical because of unsuitable rainfall or excessively large storage tanks.
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- 2021
48. Evaluation of a continuous flow microbial fuel cell for treating synthetic swine wastewater containing antibiotics.
- Author
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Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Liu, Y, Deng, L, Chen, Z, Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Liu, Y, Deng, L, and Chen, Z
- Abstract
Microbial fuel cell (MFC) systems are promising technologies for wastewater treatment and renewable energy generation simultaneously. Performance of a double-chamber microbial fuel cell (MFC) to treat synthetic swine wastewater containing sulfonamide antibiotics (SMs) was evaluated in this study. The MFC was operated in continuous modes at different conditions. Results indicated that the current was successfully generated during the operation. The performance of MFC under the sequential anode-cathode operating mode is better than that under the single continuous running mode. Specifically, higher removal efficiency of chemical oxygen demand (>90%) was achieved under the sequential anode-cathode operating mode in comparison with that in the single continuous mode (>80%). Nutrients were also be removed in the MFC's cathode chamber with the maximum removal efficiency of 66.6 ± 1.4% for NH4+-N and 32.1 ± 2.8% for PO43--P. Meanwhile, SMs were partly removed in the sequential anode-cathode operating with the value in a range of 49.4%-59.4% for sulfamethoxazole, 16.8%-19.5% for sulfamethazine and 14.0%-16.3% for sulfadiazine, respectively. SMs' inhibition to remove other pollutants in both electrodes of MFC was observed after SMs exposure, suggesting that SMs exert toxic effects on the microorganisms. A positive correlation was found between the higher NH4+-N concentration used in this study and the removal efficiency of SMs in the cathode chamber. In short, although the continuous flow MFC is feasible for treating swine wastewater containing antibiotics, its removal efficiency of antibiotics requires to be further improved.
- Published
- 2021
49. Improving sulfonamide antibiotics removal from swine wastewater by supplying a new pomelo peel derived biochar in an anaerobic membrane bioreactor.
- Author
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Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Nguyen, QA, Zhang, J, Liang, S, Cheng, D, Ngo, HH, Guo, W, Chang, SW, Nguyen, DD, Nguyen, QA, Zhang, J, and Liang, S
- Abstract
Sulfonamide antibiotics (SMs), as a class of antibiotics commonly used in swine industries, pose a serious threat to animal and human health. This study aims to evaluate the performance of an anaerobic membrane bioreactor (AnMBR) with and without supplying a new pomelo peel derived biochar to treat swine wastewater containing SMs. Results show that 0.5 g/L biochar addition could increase more than 30% of sulfadiazine (SDZ) and sulfamethazine (SMZ) removal in AnMBR. Approximately 95% of chemical oxygen demand (COD) was removed in the AnMBR at an influent organic loading rate (OLR) of 3.27 kg COD/(m3·d) while an average methane yield was 0.2 L/g CODremoved with slightly change at a small dose 0.5 g/L biochar addition. SMs inhibited the COD removal and methane production and increased membrane fouling. The addition of biochar could reduce the membrane fouling by reducing the concentration of SMP and EPS.
- Published
- 2021
50. Microbial community response to ciprofloxacin toxicity in sponge membrane bioreactor
- Author
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Dang, B-T, Bui, X-T, Itayama, T, Ngo, HH, Jahng, D, Lin, C, Chen, S-S, Lin, K-YA, Nguyen, T-T, Nguyen, DD, and Saunders, T
- Subjects
Bioreactors ,Ciprofloxacin ,Microbiota ,Waste Water ,Nitrification ,Environmental Sciences - Abstract
This study aims to offer insights into how ciprofloxacin (CIP) impact bacterial community structures in the Sponge-MBR process when CIP is spiked into hospital wastewater. We found that the CIP toxicity decreased richness critical phylotypes such as phylum class ẟ-, β-, ɣ-proteobacteria, and Flavobacteria that co-respond to suppress denitrification and cake fouling to 37% and 28% respectively. Cluster analysis shows that the different community structures were formed under the influence of CIP toxicity. CIP decreased attached growth biomass by 2.3 times while increasing the concentration of permeate nitrate by 3.8 times, greatly affecting TN removal by up to 26%. Ammonia removal was kept stable by inflating the ammonia removal rate (p
- Published
- 2020
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