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Thermodynamic modelling of unloaded and loaded N,N-diethylethanolamine solutions

Green Energy & Environment 2016年第3期1卷 246-257页

作者： monica Garcia Hanna K.Knuutila Sai Gu Department of Chemical and Process Engineering Faculty of Engineering and Physical SciencesUniversity of Surrey Department of Chemical Engineering Norwegian University of Science and Technology (NTNU)

Chemical absorption is a crucial step for several chemical processes such as ammonia production, coal gasification, methane reforming,ethylene oxide manufacturing and treatment of associated gas streams [1]. It is considered one of the main processes to eliminate CO_2 emissions from power plants by *** of new solvents are of high interest in chemical absorption for carbon capture. For the design of the absorption and desorption columns it is essential to know the vapour-liquid equilibrium(VLE), heat of absorption and densities. N,N-diethylethanolamine(DEEA) appeared as one of the amines with the lowest amount of energy needed for its regeneration [2], which would directly decrease the operation costs. DEEA has a high CO_2 loading of 1 mol/mol of amine compared to the traditional MEA solvent(0.5 mol/mol amine) and is obtained from renewable sources[1]. The main weakness is its low absorption rate and consequently the use of promoters is *** this work, a thermodynamic model based on the electrolyte non-random two-liquid theory(eNRTL) was created and fitted to correlate and predict the partial and total pressures of the unloaded and loaded aqueous DEEA solutions. New interaction parameters were obtained for the binary and tertiary system. This model represents the vapour pressures of the pure components, DEEA and H_2 O, with AARD of 1.9% and 1.73%respectively. Furthermore, the fitted model predicts the total pressure above the binary system, H_2O-DEEA, with AARD of 0.05%. The excess of enthalpy and densities are predicted with AARD of 5.63% and 1.38% respectively. The tertiary system, H_2O-DEEA-CO_2, is fitted for 2 M and5 M DEEA solutions with loading between 0.042 and 0.9 mol CO_2/mol amine up to 80 ℃. Results of CO_2 partial pressures and total pressures are reproduced, with AARD of 19.45% and 16.18% respectively. Densities are predicted with an AARD of 1.52%.

关键词： DEEA CO2 capture Chemical absorption Modelling

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Sustainable Land-Use Recommendations in Light of Agroforestry Systems in Response to the Changing Scenario of Land-Cover

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Advances in Remote Sensing 2022年第2期11卷 38-48页

作者： Tarulata Shapla monica S. Myers Raja Sengupta Department of Agroforestry & Environmental Science Sher-e-Bangla Agricultural University Dhaka Bangladesh Research and Projects Department ECO Canada Calgary Canada Department of Geography & McGill School of Environment McGill University Montréal Canada

Change detection of land-cover to recommend the future directions of land-use is indispensable for sustainable development and the proper utilization of land resources. In this research, unsupervised classification maps produced using images of Landsat 8 OLI from 2013 until 2021 (with a 4-year interval) reveal important land-cover changes, along with their drivers, in Kapasia, Bangladesh. Overall, a substantial increase in paddy (24.7% to 27.2%) and urban (3.5% to 10.1%) and a decrease in homestead (67.5% to 59.3%) and forest (4.2% to 3.4%) were observed within the time interval. To direct the land-use towards long-term biodiversity and sustainability of the region, it is important to implement types of agroforestry systems as the observed decrease in homestead and forest areas are alarming. Agroforestry practices will not only have a positive environmental impact but can help diversify food systems, increase economic return and optimize natural resource use.

关键词： Agroforestry Systems Landsat 8 OLI Land-Use and Land-Cover (LULC)

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Electrocardiographic abnormalities in prevalent infections in tropical regions:A scoping review

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Journal of Acute Disease 2022年第2期11卷 45-51页

作者： Gautam Jesrani Samiksha Gupta Saurabh Gaba monica Gupta Department of General Medicine Government Medical College and HospitalChandigarhIndia

Cardiovascular manifestations and electrocardiographic abnormalities have been reported among some prevalent infections in tropical regions,which lead to a great amount of morbidity and *** major infectious diseases include chikungunya,dengue fever,H1N1 influenza,and coronavirus disease-19(COVID-19)in the viral category,leptospirosis,salmonellosis,scrub typhus and tuberculosis in the bacterial category,and malaria in the protozoan parasite *** these infirmities constitute a foremost infection burden worldwide and have been linked to the various cardiac rhythm *** we aimed to identify and compile different studies on these infections and associated acute electrocardiographic(ECG)*** search was made in online international libraries like PubMed,Google Scholar,and EMBASE,and 38 most relevant articles,including original research,systematic reviews,and unique case reports were *** of them were evaluated thoroughly and information regarding ECG was *** is the predominant underlying pathology for rhythm disturbance and can be affected either due to the direct pathogenic effect or the abnormal immune system *** variabilities in some infections like chikungunya,scrub typhus,and leptospirosis are associated with longer hospital stay and poor *** infective diseases are associated with prominent acute cardiac rhythm abnormalities due to myocarditis,which can be identified preliminarily by ECG changes.

关键词： ECG Chikungunya COVID-19 Dengue H1N1 Leptospirosis Malaria Salmonella Scrub typhus Tuberculosis

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Leveraging mathematical models of disease dynamics and machine learning to improve development of novel malaria interventions

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Infectious Diseases of Poverty 2022年第3期11卷 37-53页

作者： monica Golumbeanu Guo-Jing Yang Flavia Camponovo Erin M.Stuckey Nicholas Hamon Mathias Mondy Sarah Rees Nakul Chitnis Ewan Cameron Melissa A.Penny Swiss Tropical and Public Health Institute AllschwilSwitzerland Key Laboratory of Tropical Translational Medicine of Ministry of Education and School of Tropical Medicine and Laboratory Medicine The First and Second Affiliated Hospital of Hainan Medical UniversityHainan Medical UniversityHaikouHainanPeople’s Republic of China University of Basel BaselSwitzerland Center for Communicable Disease Dynamics Department of EpidemiologyHarvard T.H.Chan School of Public HealthBostonMA02115USA The Bill&Melinda Gates Foundation SeattleWAUSA Innovative Vector Control Consortium LiverpoolUK Malaria Atlas Project Big Data InstituteUniversity of OxfordOxfordUK Curtin University PerthAustralia Telethon Kids Institute Perth Children’s HospitalPerthAustralia

Background:Substantial research is underway to develop next-generation interventions that address current malaria control *** there is limited testing in their early development,it is difficult to predefine intervention properties such as efficacy that achieve target health goals,and therefore challenging to prioritize selection of novel candidate ***,we present a quantitative approach to guide intervention development using mathematical models of malaria dynamics coupled with machine *** analysis identifies requirements of efficacy,coverage,and duration of effect for five novel malaria interventions to achieve targeted reductions in malaria ***:A mathematical model of malaria transmission dynamics is used to simulate deployment and predict potential impact of new malaria interventions by considering operational,health-system,population,and disease *** method relies on consultation with product development stakeholders to define the putative space of novel intervention *** couple the disease model with machine learning to search this multi-dimensional space and efficiently identify optimal intervention properties that achieve specified health ***:We apply our approach to five malaria interventions under *** for malaria prevalence reduction,we identify and quantify key determinants of intervention impact along with their minimal properties required to achieve the desired health *** coverage is generally identified as the largest driver of impact,higher efficacy,longer protection duration or multiple deployments per year are needed to increase prevalence *** show that interventions on multiple parasite or vector targets,as well as combinations the new interventions with drug treatment,lead to significant burden reductions and lower efficacy or duration ***:Our approach uses disease dynamic models and machine learning to support

关键词： Infectious diseases Malaria Novel interventions Mathematical modelling Machine learning

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Eutectic mixture promoted CO_2 sorption on MgO-TiO_2 composite at elevated temperature

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Journal of Environmental Sciences 2019年第2期31卷 80-88页

作者： Vishwanath Hiremath monica Louise T.Trivino Jeong Gil Seo Department of Energy Science and Technology Myongji University

The development of carbon dioxide(CO_2) sorbents that can operate at elevated temperatures is significant for the advancement of pre-combustion capture ***, promoter-based systems composed of alkali/alkaline earth metal nitrates and/or carbonates have been considered as next-generation solid sorbents due to their improved CO_2 uptake and kinetics. However, obtaining stable MgO sorbents against temperature swing regeneration still remained challenging. Herein, we report MgO-TiO_2 solid sorbents promoted by eutectic mixture(KNO_3 and LiNO_3) for elevated temperature CO_2 sorption. The developed sorbents show improved CO_2 sorption capacity, which may be attributed to the alternative CO_2 sorption pathway provided by the ionization of highly dispersed MgO in the eutectic mixture. The MgO-TiO_2 framework was also shown to assist in retaining the MgO configuration by constraining its interaction with CO_2. Furthermore, it is demonstrated that constructing composite structures is essential to improve the CO_2 sorption characteristics,mainly recyclability, at elevated temperatures. The developed promoter integrated sorbents showed exceptionally high CO_2 sorption capacity of > 30 wt.% at an elevated temperature(300°C) with pronounced stability under temperature swing operation.

关键词： MgO-TiO2 composite Elevated temperature CO2 capture Eutectic mixture promoter MgO stability

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Interaction of silver nanoparticles with mediterranean agricultural soils: Lab-controlled adsorption and desorption studies

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Journal of Environmental Sciences 2019年第9期31卷 205-216页

作者： Laura Torrent Eva Margui Ignasi Queralt Manuela Hidalgo monica Iglesias Department of Chemistry University of Girona C/M. Aurelia Capmany 69 17003 Girona Spain Institute of Environmental Assessment and Water Research (IDAEA-CSIC) C. Jordi Girona 28-26 08034 Barcelona Spain

The production of silver nanoparticles(AgNPs) has increased tremendously during recent years due to their antibacterial and physicochemical properties. As a consequence, these particles are released inevitably into the environment, with soil being the main sink of disposal. Soil interactions have an effect on AgNP mobility, transport and bioavailability. To understand AgNP adsorption processes, lab-controlled kinetic studies were *** tests performed with five different Mediterranean agricultural soils showed that cation exchange capacity and electrical conductivity are the main parameters controlling the adsorption processes. The adsorption kinetics of different sized(40, 75, 100 and 200 nm)and coated(citrate, polyvinylpyrrolidone and polyethyleneglycol(PEG)) AgNPs indicated that these nanoparticle properties have also an effect on the adsorption *** assess the mobility and bioavailability of AgNPs and to determine if their form is maintained during adsorption/desorption processes, loaded soils were submitted to leaching tests three weeks after batch adsorption studies. The DIN 38414-S4 extraction method indicated that AgNPs were strongly retained on soils, and single-particle inductively coupled plasma mass spectrometry confirmed that silver particles maintained their nanoform, except for 100 nm PEG-AgNPs and 40 nm citrate-coated AgNPs. The DTPA(diethylenetriaminepentaacetic acid) leaching test was more effective in extracting silver,but there was no presence of AgNPs in almost all of these leachates.

关键词： Silver nanoparticles Agricultural soils Sorption kinetics Leaching tests Single-particle inductively coupled plasma mass spectrometry

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A Review of the Mathematical Models for the Impact of Seasonal Weather Variation and Infections on Prey Predator Interactions in Serengeti Ecosystem

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Open Journal of Ecology 2022年第11期12卷 718-732页

作者： Raymond Charles Oluwole Daniel Makinde monica Kung’aro Department of Mathematics University of Dodoma Dodoma Tanzania Faculty of Military Science Stellenbosch University Cape Town South Africa

Interaction between prey and predator species is a complex and non-linear process. Understanding various phenomena in the dynamics of prey-predator systems is vital to both mathematical ecology and conservation biology. Mathematical models on prey-predator systems have been the hot sport providing important information regarding the interactions of prey and predator species in various ecosystems. In this paper, a review of the available mathematical models on prey-predator systems was done. Our aim was to assess their structure, behaviour, available control strategies, population involved and their ability in predicting the future behaviour of the ecosystems. We observed diversities in the reviewed mathematical models, some model incorporated factors such as drought, harvesting and prey refuge as the factors that affect ecosystems, some ignored the contribution of environmental variations while others considered the variable carrying capacity. Most of the models reviewed have not considered the contribution of diseases and seasonal weather variation in the dynamics of prey predator systems. Some of the reviewed models do not match the real situation in most modelled ecosystems. Thus, to avoid unreliable results, this review reveals the need to incorporate seasonal weather variations and diseases in the dynamics of prey predator systems of Serengeti ecosystem.

关键词： Prey Predator Weather Variation Disease Serengeti Ecosystem

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2 GeV Electron Beam Irradiation Effects in Advanced Metallic Glasses

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Journal of Minerals and Materials Characterization and Engineering 2022年第2期10卷 106-112页

作者： monica Sorescu Fatiha Benmokhtar Douglas Higinbotham Marcy Stutzman Department of Physics Duquesne University Pittsburgh USA Thomas Jefferson National Accelerator Facility Newport News Virginia USA

Six amorphous alloys (Alloy 1: Fe56Co24Nb4B13Si2Cu1, Alloy 2: Fe68.5Co5Nb3Cu1Si15.5B7, Alloy 3: Fe75.3Ni0.8Cr0.9Si8.7B14.3, Alloy 4: Fe56Co24Cr10Nb4B3Si1Cu2, Alloy 5: Fe72.9Nb3Cu1Si16.2B6.9, Alloy 6: Fe83.3Si8.6Nb5.5B1.4Cu1.2) were selected in terms of their composition and magnetostriction constants and uniformly irradiated in a high radiation environment in Hall A of the Thomas Jefferson National Accelerator Facility. The 2 GeV electron beam irradiation-induced effects were characterized by Mӧssbauer spectroscopy. The microstructural changes were related to the evolution of the hyperfine magnetic field distributions and isomer shifts. In particular, the occurrence of stress centers in the amorphous materials was evidenced.

关键词： Metallic Glasses Hyperfine Interactions Magnetostriction Radiation Effects Mӧssbauer Spectroscopy

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Type Ⅱ Blow-up in the 5-dimensional Energy Critical Heat Equation

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Acta Mathematica Sinica,English Series 2019年第6期35卷 1027-1042页

作者： Manuel del PINO monica MUSSO Jun Cheng WEI Department of Mathematical Sciences University of Bath Departamento de Ingeniería Matemática-CMM Universidad de Chile Departamento de Matemáticas Universidad Católica de Chile Department of Mathematics University of British Columbia

We consider the Cauchy problem for the energy critical heat equation ■ in dimension n = 5. More precisely we find that for given points q_1, q_2,..., q_k and any sufficiently small T > 0 there is an initial condition u0 such that the solution u(x, t) of(0.1) blows-up at exactly those k points with rates type Ⅱ, namely with absolute size ～(T-t)^(-α) for α >3/4. The blow-up profile around each point is of bubbling type, in the form of sharply scaled Aubin–Talenti bubbles.

关键词： Singularity formation bubbling phenomena critical parabolic equations

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Low ADAMTS-13/VWF ratio and altered gut–liver axis predict complications of advanced chronic liver disease:a pilot study

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Gastroenterology Report 2022年第1期10卷 671-673页

作者： Francesca Romana Ponziani monica Sacco Maira Tardugno Francesco Santopaolo Adriana Marsico Stefano Manna Stefano Lancellotti Antonio Gasbarrini Raimondo De Cristofaro Maurizio Pompili Internal Medicine and Gastroenterology–Hepatology Unit Fondazione Policlinico Universitario Agostino Gemelli IRCCSRomeItaly Translational Medicine and Surgery Department Catholic UniversityRomeItaly Hemorrhagic and Thrombotic Diseases Service Fondazione Policlinico Universitario Agostino Gemelli IRCCSRomeItaly

Introduction Liver cirrhosis is characterized by a delicate balance between thrombosis and *** extinction due to microvascular thrombosis is involved in disease progression and anticoagulant therapy with low-molecular-weight heparin has been shown to reduce the frequency of hepatic decompensation[1].Dysbiosis and bacterial translocation,which are hallmarks of liver cirrhosis,can influence the coagulation system through inflammation or by the activation of Toll-like receptors on endothelial cells and platelets[2].However,little is known about the connections between the coagulation system,the occurrence of liver cirrhosis complications,and the gut microbiome.

关键词： complications inflammation bleeding

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