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https://www.readbyqxmd.com/read/28631123/modeling-solubility-of-co2-hydrocarbon-gas-in-ionic-liquid-emim-fap-using-aspen-plus-simulations
#1
Bishwadeep Bagchi, Sushmita Sati, Vidyasagar Shilapuram
The Peng-Robinson equation of state with quadratic van der Waals (vdW) mixing rule model was chosen to perform the thermodynamic calculations in Flash3 column of Aspen Plus to predict the solubility of CO2 or any one of the hydrocarbons (HCs) among methane, ethane, propane, and butane in an ionic liquid 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([emim][FAP]). Bubble point pressure, solubility, bubble point temperature, fugacity, and partial molar volume at infinite dilution were obtained from the simulations, and enthalpy of absorption, Gibbs free energy of solvation, and entropy change of absorption were estimated by thermodynamic relations...
June 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624948/metal-release-from-contaminated-leaf-litter-and-leachate-toxicity-for-the-freshwater-crustacean-gammarus-fossarum
#2
Florence Maunoury-Danger, Vincent Felten, Clément Bojic, Fabrice Fraysse, Mar Cosin Ponce, Odile Dedourge-Geffard, Alain Geffard, François Guérold, Michael Danger
Industrialization has left large surfaces of contaminated soils, which may act as a source of pollution for contiguous ecosystems, either terrestrial or aquatic. When polluted sites are recolonized by plants, dispersion of leaf litter might represent a non-negligible source of contaminants, especially metals. To evaluate the risks associated to contaminated leaf litter dispersion in aquatic ecosystems, we first measured the dynamics of metal loss from leaf litter during a 48-h experimental leaching. We used aspen (Populus tremula L...
June 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28622737/a-mnemonic-for-pharmacists-to-ensure-optimal-monitoring-and-safety-of-total-parenteral-nutrition-i-am-full
#3
Chris J Bohl, Ann Parks
OBJECTIVE: To present a guideline-derived mnemonic that provides a systematic monitoring process to increase pharmacists' confidence in total parenteral nutrition (TPN) monitoring and improve safety and efficacy of TPN use. DATA SOURCES: The American Society for Parenteral and Enteral Nutrition (ASPEN) guidelines were reviewed. Additional resources included a literature search of PubMed (1980 to May 2016) using the search terms: total parenteral nutrition, mnemonic, indications, allergy, macronutrients, micronutrients, fluid, comorbidities, labs, peripheral line, and central line...
July 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28595513/modeling-and-comparative-assessment-of-bubbling-fluidized-bed-gasification-system-for-syngas-production-a-gateway-for-a-cleaner-future-in-pakistan
#4
Areeb Shehzad, Mohammed J K Bashir, Mika Horttanainen, Mika Manttari, Jouni Havukainen, Ghulam Abbas
The present study explores the potential of MSW gasification for exergy analysis and has been recently given a premier attention in a region like Pakistan where the urbanization is rapidly growing and resources are few. The plant capacity was set at 50 MW based on reference data available and the total exergetic efficiency was recorded to be 31.5 MW. The largest irreversibility distribution appears in the gasifier followed by methanation unit and CO2 capture. The effect of process temperature, equivalence ratio and MSW moisture content was explored for inspecting the variations in syngas composition, lower heating value, carbon conversion efficiency and cold gas efficiency...
June 19, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28591431/autumn-senescence-in-aspen-is-not-triggered-by-day-length
#5
Ingrid H Michelson, Pär K Ingvarsson, Kathryn M Robinson, Erik Edlund, Maria E Eriksson, Ove Nilsson, Stefan Jansson
Autumn senescence in mature aspens, grown under natural conditions, is initiated at almost the same date every year. The mechanism of such precise timing is not understood but we have previously shown that the signal must be derived from light. We studied variation in bud set and autumn senescence in a collection of 116 natural Eurasian aspen (Populus tremula) genotypes, from twelve populations in Sweden and planted in one northern and one southern common garden, to test the hypothesis that onset of autumn senescence is triggered by day length...
June 7, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28583488/non-invasive-methods-to-maintain-cervical-spine-position-after-pediatric-tracheal-resections
#6
Kahren K Aydinyan, Jonathan D Day, Gina M Troiano, G Paul Digoy
OBJECTIVES: To present our experience with two methods of neck stabilization after pediatric tracheal resection with primary anastomosis as possible alternatives to the traditional chest-chin suture. METHODS: Children undergoing tracheal resection and/or cricotracheal resection with anastomosis under tension were placed in cervical spine flexion postoperatively with either a chest-chin (Grillo) suture, an Aspen cervical collar or Trulife Johnson cervical-thoracic orthosis (CTO)...
July 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28579143/energy-from-poultry-waste-an-aspen-plus-based-approach-to-the-thermo-chemical-processes
#7
Gianluca Cavalaglio, Valentina Coccia, Franco Cotana, Mattia Gelosia, Andrea Nicolini, Alessandro Petrozzi
A particular approach to the task of energy conversion of a residual waste material was properly experienced during the implementation of the national funded Enerpoll project. This project is a case study developed in the estate of a poultry farm that is located in a rural area of central Italy (Umbria Region); such a farm was chosen for the research project since it is almost representative of many similar small-sized breeding realties of the Italian regional context. The purpose of the case study was the disposal of a waste material (i...
May 31, 2017: Waste Management
https://www.readbyqxmd.com/read/28554482/process-simulation-and-techno-economic-analysis-of-renewable-diesel-production-via-catalytic-decarboxylation-of-rubber-seed-oil-a-case-study-in-malaysia
#8
Kin Wai Cheah, Suzana Yusup, Haswin Kaur Gurdeep Singh, Yoshimitsu Uemura, Hon Loong Lam
This work describes the economic feasibility of hydroprocessed diesel fuel production via catalytic decarboxylation of rubber seed oil in Malaysia. A comprehensive techno-economic assessment is developed using Aspen HYSYS V8.0 software for process modelling and economic cost estimates. The profitability profile and minimum fuels selling price of this synthetic fuels production using rubber seed oil as biomass feedstock are assessed under a set of assumptions for what can be plausibly be achieved in 10-years framework...
May 26, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28522459/drug-company-aspen-faces-probe-over-hiking-generic-prices
#9
Nigel Hawkes
No abstract text is available yet for this article.
May 18, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28512468/molecular-identification-and-karyological-analysis-of-a-rampant-aspen-populus-tremula-l-salicaceae-clone
#10
Dmitry V Politov, Yuri S Belokon, Anna V Shatokhina, Maryana M Belokon, Nail A Khanov, Elena A Mudrik, Tatyana A Polyakova, Anna B Azarova, Konstantin A Shestibratov
A rampant highly heterozygous aspen (Populus tremula L.) clone "Meshabash" has been revealed in course of population genetic diversity analysis in a native stand in the Republic of Tatarstan, Russia. Here we report the results of karyological analysis showing that this highly vigorous clone is diploid (2n = 38) while typically triploid aspen demonstrates increased growth rate and resistance to aspen trunk rot caused by fungus Phellinus tremulae. By means of DNA identification of a series of model trees using 14 SSR loci we outlined the area occupied by this clone (at least 1...
2017: International Journal of Plant Genomics
https://www.readbyqxmd.com/read/28500887/integrated-techno-economic-and-environmental-analysis-of-butadiene-production-from-biomass
#11
Somayeh Farzad, Mohsen Ali Mandegari, Johann F Görgens
In this study, lignocellulose biorefineries annexed to a typical sugar mill were investigated to produce either ethanol (EtOH) or 1,3-butadiene (BD), utilizing bagasse and trash as feedstock. Aspen simulation of the scenarios were developed and evaluated in terms of economic and environmental performance. The minimum selling prices (MSPs) for bio-based BD and EtOH production were 2.9-3.3 and 1.26-1.38-fold higher than market prices, respectively. Based on the sensitivity analysis results, capital investment, Internal Rate of Return and extension of annual operating time had the greatest impact on the MSP...
September 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28483497/bio-methane-from-an-aerobic-digestion-using-activated-carbon-adsorption
#12
Muhammad Farooq, Alexandra H Bell, M N Almustapha, John M Andresen
There is an increasing global demand for carbon-neutral bio-methane from an-aerobic digestion (AD) to be injected into national gas grids. Bio-gas, a methane -rich energy gas, is produced by microbial decomposition of organic matter through an-aerobic conditions where the presence of carbon dioxide and hydrogen sulphide affects its performance. Although the microbiological process in the AD can be tailored to enhance the bio-gas composition, physical treatment is needed to convert the bio-gas into bio-methane...
May 5, 2017: Anaerobe
https://www.readbyqxmd.com/read/28462684/integrated-gasification-combined-cycle-using-egyptian-maghara-coal-rice-straw-feedstock
#13
A Hegazy, A O Ghallab, F H Ashour
Rice straw is an agricultural waste that causes an annoying problem in Egypt if it is not well exploited. This study focuses on using this waste in power generation by co-gasification of Egyptian Maghara coal and rice straw blends using entrained flow gasifier technology. Aspen Plus was used to conduct a parametric study for investigation of the effect of changing the inputs to the gasifier on the produced gas composition. Three different input parameters, influencing the performance of the gasifier, including the percentage of coal to rice straw in the blend, the fraction of added water to the blend, and the mass percentage of oxygen with respect to the mass of the blend fed to the gasifier were analysed...
April 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28453391/global-leadership-initiative-on-malnutrition-progress-report-from-aspen-clinical-nutrition-week-2017
#14
Gordon L Jensen, Tommy Cederholm
No abstract text is available yet for this article.
April 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28428822/in-muro-deacetylation-of-xylan-affects-lignin-properties-and-improves-saccharification-of-aspen-wood
#15
Prashant Mohan-Anupama Pawar, Marta Derba-Maceluch, Sun-Li Chong, Madhavi Latha Gandla, Shamrat Shafiul Bashar, Tobias Sparrman, Patrik Ahvenainen, Mattias Hedenström, Merve Özparpucu, Markus Rüggeberg, Ritva Serimaa, Martin Lawoko, Maija Tenkanen, Leif J Jönsson, Ewa J Mellerowicz
BACKGROUND: Lignocellulose from fast growing hardwood species is a preferred source of polysaccharides for advanced biofuels and "green" chemicals. However, the extensive acetylation of hardwood xylan hinders lignocellulose saccharification by obstructing enzymatic xylan hydrolysis and causing inhibitory acetic acid concentrations during microbial sugar fermentation. To optimize lignocellulose for cost-effective saccharification and biofuel production, an acetyl xylan esterase AnAXE1 from Aspergillus niger was introduced into aspen and targeted to cell walls...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28384532/circadian-patterns-of-xylem-sap-properties-and-their-covariation-with-plant-hydraulic-traits-in-hybrid-aspen
#16
Annika Meitern, Eele Õunapuu-Pikas, Arne Sellin
Physiological processes taking place in plants are subject to diverse circadian patterns but some of them are poorly documented in natural conditions. The daily dynamics of physico-chemical properties of xylem sap and their covariation with tree hydraulic traits were investigated in hybrid aspen (Populus tremula L.×P. tremuloides Michx) in field conditions in order to clarify which environmental drivers govern the daily variation in these parameters. K(+) concentration ([K(+)]), electrical conductivity (σsap), osmolality (Osm) and pH of the xylem sap, as well as branch hydraulic traits, were measured in the field over 24-h cycles...
March 22, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28377782/species-delimitation-and-lineage-separation-history-of-a-species-complex-of-aspens-in-china
#17
Honglei Zheng, Liqiang Fan, Richard I Milne, Lei Zhang, Yaling Wang, Kangshan Mao
Species delimitation in tree species is notoriously challenging due to shared polymorphisms among species. An integrative survey that considers multiple operational criteria is a possible solution, and we aimed to test it in a species complex of aspens in China. Genetic [four chloroplast DNA (cpDNA) fragments and 14 nuclear microsatellite loci (nSSR)] and morphological variations were collected for 76 populations and 53 populations, respectively, covering the major geographic distribution of the Populus davidiana-rotundifolia complex...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28377780/pseudomonas-fluorescens-transportome-is-linked-to-strain-specific-plant-growth-promotion-in-aspen-seedlings-under-nutrient-stress
#18
Shalaka Shinde, Jonathan R Cumming, Frank R Collart, Philippe H Noirot, Peter E Larsen
Diverse communities of bacteria colonize plant roots and the rhizosphere. Many of these rhizobacteria are symbionts and provide plant growth promotion (PGP) services, protecting the plant from biotic and abiotic stresses and increasing plant productivity by providing access to nutrients that would otherwise be unavailable to roots. In return, these symbiotic bacteria receive photosynthetically-derived carbon (C), in the form of sugars and organic acids, from plant root exudates. PGP activities have been characterized for a variety of forest tree species and are important in C cycling and sequestration in terrestrial ecosystems...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28360939/techno-economic-assessment-of-hybrid-extraction-and-distillation-processes-for-furfural-production-from-lignocellulosic-biomass
#19
Le Cao Nhien, Nguyen Van Duc Long, Sangyong Kim, Moonyong Lee
BACKGROUND: Lignocellulosic biomass is one of the most promising alternatives for replacing mineral resources to overcome global warming, which has become the most important environmental issue in recent years. Furfural was listed by the National Renewable Energy Laboratory as one of the top 30 potential chemicals arising from biomass. However, the current production of furfural is energy intensive and uses inefficient technology. Thus, a hybrid purification process that combines extraction and distillation to produce furfural from lignocellulosic biomass was considered and investigated in detail to improve the process efficiency...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28360169/complete-genome-sequences-of-two-genotype-a2-small-ruminant-lentiviruses-isolated-from-infected-u-s-sheep
#20
Aspen M Workman, Aaron M Dickey, Michael P Heaton, Michael L Clawson, Timothy P L Smith
Two distinct subgroups of genotype A2 small ruminant lentiviruses (SRLVs) have been identified in the United States that infect sheep with specific host transmembrane protein 154 (TMEM154) diplotypes. Here, we report the first two complete genome sequences of SRLV strains infecting U.S. sheep belonging to genotype A2, subgroups 1 and 2.
March 30, 2017: Genome Announcements
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