bluuebunny/crossref_metadata_2025_split huggingface dataset:
DEVELOPMENT OF RATIONAL METHOD OF SYNTHESIS OF NANOCRYSTALLINE LEAD MOLYBDATE IN MELTS OF Na2MO2O7 - PbCO3 SYSTEM
Authors: Shurdumov Ghazali K. , Сherkesov Zaur A. , Kаndurova Eleоnora F. 
Published: August 2017

The work presents material on interaction of dimolybdate of sodium and carbonate of lead, and also data on the development of a rational method for the synthesis of PbMoO4 in the melts, characterized by high productivity and yield of the target product of "h.с." brand in the nanocrystalline state. To achieve the work aims the thermodynamic assessment of the ability of the synthesis of molybdate of lead in melts of the system Na2Mo2O7 – PbCO3 was given. It is shown that the thermodynamic probability of formation of molybdate of lead in a number of Na2Mo2O7 – PbO(PbO2, PbCO3), is maximal for the process in the system of dimolybdate sodium – lead carbonate. The starting material for the synthesis of lead molybdate – dimolybdate sodium – was synthesized from recrystallized and dehydrated sodium molybdate and molybdenum oxide (VI). The melting temperature of synthesized dimolybdate sodium is 612 °C (614 °C – literature data). Synthesis of lead molybdate was done after careful grinding of the initial reagents and sifting through a sieve. The temperature of the synthesis process of 650 °C was maintained for 1.5 h until reaching the constant weight of mixture. Then mixture was sintered, cooled to room temperature and leached with hot (70-80 °C) distilled water. The precipitate of lead molybdate was filtered, washed on the filter to a negative reaction on molybdate ion. Synthesized molybdate of lead was dried, washed and calcined to constant weight. The yield of lead (II) molybdate was of 99.88% of the theoretical. Analysis of the obtained product was based on reaction between PbMoO4 with sodium carbonate with the formation of sodium molybdate, lead oxide (II) and carbon oxide (IV). Thus obtained sample was sintered, leached with hot distilled water and filtered. The residue was treated with acetic acid obtained from acetate of lead, the latter is determined in a form of lead molybdate (sodium molybdate deposition). To determine molybdenum from the filtrate from PbO, the inverse sedimentation method was used, in the form of BaMoO4, which is its weight form. The work also contains a material on the identification of the synthesized product by modern research methods.For citation:Shurdumov G.K., Cherkesov Z.A., Kandurova E.F. Development of rational method of synthesis of nanocrystalline lead molybdate in melts of Na2Mo2O7 – PbCO3 system. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 7. P. 78-84.
STUDY OF MASS CONDUCTIVITY PROPERTIES OF SEEDS LAYER
Authors: Rudobashta Stanislav P. , Zueva Galina A. , Dmitriev Vyacheslav M. 
Published: August 2017

Data on the mass conductivity coefficient have been obtained during drying the onion seeds in a thick layer of 5 mm thick ventilated on the surface, which were calculated by the zonal method on the basis of experimental curves of drying and heating. These data are described by the dependence of the mass conductivity coefficient on temperature and moisture content of the material. The comparison of the mass conductivity coefficient values for a layer and for single seeds is given, which shows that: 1) the mass conductivity coefficient in the layer changes significantly during drying, therefore, this change must be taken into account; 2) the change in the mass conductivity coefficient is due to its dependence on both moisture content and temperature, but the influence of temperature prevails over the influence of moisture content, therefore, themass conductivity coefficient increases during drying, 3) the mass conductivity coefficient in the layer is two orders of magnitude higher than for single seeds. The curve of seeds drying in a layer of 5 mm thick have been calculated using the obtained data on the mass conductivity coefficient for the process of oscillating infrared seeds drying carried out at a material temperature fluctuation in the range from tmin = 34 °C to tmax = 40 °C, which showed satisfactory agreement of the results of calculation and experiment. Experimental and calculated curves of oscillating infrared seeds drying in a layer of 5 mm thick are compared with analogous curves of drying the seeds in a monolayer, which showed that, despite the fact that the mass conductivity coefficient of seeds in a layer of 5 mm thick is two orders of magnitude greater than in a monolayer, the drying of seeds in the first case is slower because of the greater thickness of the layer. To calculate the kinetics of the process of oscillating infrared seeds drying in a dense layer, when its surface temperature oscillates in the range from tmin = 34 °C to tmax = 40 °C, the zonal method is recommended using the obtained data on the mass conductivity coefficient, taking into account the change in the mass conductivity during the process.Forcitation:Rudobashta S.P., Zueva G.A., Dmitriev V.M. Study of mass conductivity properties of seedslayer. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 7. P. 72-77.
Pilot Plant NO2 Removal with Aqueous Sulfite
Authors: Sexton Andrew , Sachde Darshan , Vance Austyn , Fisher Kevin , Selinger Joseph , Fischer Kent , Rochelle Gary 
Published: August 2017

Abstract
A novel method to remove nitrogen dioxide (NO2) from the flue gas of coal-fired power plants with CO2 capture has been advanced for commercial implementation. The technology leverages the equipment and chemistry in an existing (sulfur dioxide) SO2 polishing scrubber upstream of the main CO2 capture unit to remove the NO2, preventing degradation of the CO2 capture solvent and formation of nitrosamines. The report focuses on further evaluation of the chemical additives and operating conditions associated with the NO2 removal process to define conditions for commercial scale testing and deployment. Experimental work systematically evaluated a series of potential additives to minimize the oxidation of sulfite in a representative SO2 pre-scrubber solution. The additive combinations and concentrations were varied alongside important process conditions such as temperature, oxygen concentration, and metals present in solution to mimic the conditions expected in a commercial system. Important results of the parametric experimental work include identifying a new, potent sulfite oxidation inhibitor, revealing the importance of combining inhibitors with metal chelating agents, validation of a low-cost additive process, and development of a new semi-empirical model to represent mechanisms associated with sulfite oxidation. In addition, the experimental work revealed the impact of operating at higher temperatures (representative of a field test unit), which will guide the selection and concertation of additives as well. Techno-economic analysis identified potential net savings as large as $1.30/tonne CO2 captured and quantified the potential benefit of low cost additive options actively being pursued by the development team. Finally, the experimental results and engineering analysis supported the development of a detailed field testing plan and protocol to evaluate the technology at near-commercial scale. The field test preparation included development of procedures to introduce chemical additives to an existing SO2 polishing unit and identification of representative flue gas conditions based on a review of existing plants. These activities will have direct bearing on operation and design of commercial units.
Analytical Corrections to CO2-Brine Core Relative Permeability for Low Rate Flow Modeling
Authors: Rabinovich Avinoam 
Published: August 2017

Abstract
Relative permeability of CO2 and brine is one of the fundamental parameters controlling flow related to carbon storage in saline aquifers. Core samples recovered from subsurface formations are characterized in laboratory experiments to determine effective core relative permeability curves. Typically, coreflooding experiments are conducted at high injection rates so that the resulting flow is viscous dominated. However, at lower rates, it has been shown that the effective curves may change as capillary heterogeneity effects become significant. Using relative permeability determined by conventional coreflooding in simulations with low flow rates, e.g., to model CO2 migration in aquifers, may incur significant error.
A new method for calculating low flow rate relative permeability curves is presented. The method is based on approximate analytical solutions for effective relative permeability under steady state and capillary limit flow conditions. Derivation is carried out using power law averaging, assuming log normally distributed core permeability. We validate the analytical solution by comparison to numerical solutions for a wide range of cases. An additional correction for the CO2 curves is shown to be necessary and derived by matching analytical and numerical results. Given a core which has been characterized by conventional high rate coreflooding experiments, the current method gives a fast and efficient correction for low flow rate applications. It circumvents the need for additional experiments or computationally expensive coreflooding simulations.
Numerical Analyses of the Effect of the Impurity in the Gas on the Solubility Trapping in the CO2 Sequestration
Authors: Mu Lingyu , Liao Xinwei , Zhao Xiaoliang , Chen Zhiming , Zhu Langtao , Luo Biao 
Published: August 2017

Abstract
The CO2 dissolved in the aquifer will increase the density of brine, which can result in the instability of the gravity and prompt the onset of the viscous finger. The viscous finger will lead to the convective mix, accelerating the process of CO2 solution in the brine. However, the gas stream in the CO2 storage usually contains the impurities such as N2, O2, and SO2, which can change the density difference in the process of solution, and affect the solubility trapping in the CO2 sequestration.
In this paper, a numerical simulation method was used to study the effect of different impurities on the solubility trapping in the process of CO2 storage. Firstly, based on the PR-HV model, this paper calculated the solubility of CO2, N2, O2, and SO2 with different temperature and salinity and analysed the variation of the solubility. Then a multi-component numerical simulation model based on a certain aquifer layer was established to compare the CO2 dissolution rate and the onset time of the instability and analyze the influence of impurities in the CO2 stream on the solubility trapping. Finally, this paper clarified the impact on the CO2 storage and suggested that the concentration of the impurities should be controlled in a rational range for the perspective of the economy and efficiency.
The results show that the solubility of CO2 is higher than N2 and O2 in the saline water, and close to that of SO2. We applied the solubility data to the numerical simulation. The results of the numerical simulation shows that with the increase of the concentration of N2 or O2, CO2 dissolution rate has a decrease, and the onset time of the instability has an increase. It meas the longer time CO2 plume keeping in the state of good flowing capability and low density. The onset of viscous finger will be postponed, leading to a negative influence on the solubility trapping and the risk of the CO2 leak through fractures and faults. On the contrary, SO2 can shorten the onset time of the instability, which accelerates the viscous finger and prompts the solubility trapping. A further conclusion is that the effect of SO2 on the viscous fingering is more significantly than N2 and O2.
This paper deepens the understanding about the effect of the impure CO2 on the solubility trapping, and clarifies the effect of different impurities.
Field Testing of Cryogenic Carbon Capture
Authors: Sayre Aaron , Frankman Dave , Baxter Andrew , Stitt Kyler , Baxter Larry 
Published: August 2017

Abstract
Sustainable Energy Solutions has been developing Cryogenic Carbon Capture™ (CCC) since 2008. In that time two processes have been developed, the External Cooling Loop and Compressed Flue Gas Cryogenic Carbon Capture processes (CCC ECL™ and CCC CFG™ respectively).
The CCC ECL™ process has been scaled up to a 1TPD CO2 system. In this process the flue gas is cooled by an external refrigerant loop. SES has tested CCC ECL™ on real flue gas slip streams from subbituminous coal, bituminous coal, biomass, natural gas, shredded tires, and municipal waste fuels at field sites that include utility power stations, heating plants, cement kilns, and pilot-scale research reactors. The CO2 concentrations from these tests ranged from 5 to 22% on a dry basis. CO2 capture ranged from 95−99+% during these tests. Several other condensable species were also captured including NO2, SO2 and PMxx at 95+%. NO was also captured at a modest rate.
The CCC CFG™ process has been scaled up to a .25 ton per day system. This system has been tested on real flue gas streams including subbituminous coal, bituminous coal and natural gas at field sites that include utility power stations, heating plants, and pilot-scale research reactors. CO2 concentrations for these tests ranged from 5 to 15% on a dry basis. CO2 capture ranged from 95−99+% during these tests. Several other condensable species were also captured including NO2, SO2 and PMxx at 95+%. NO was also captured at 90+%. Hg capture was also verified and the resulting effluent from CCC CFG™ was below a 1ppt concentration.
This paper will focus on discussion of the capabilities of CCC, the results of field testing and the future steps surrounding the development of this technology.
Cryogenic Carbon Capture (CCC)
Since 2008 Sustainable Energy Solutions has developed a process called Cryogenic Carbon Capture (CCC). The CCC process is a true bolt-on technology that can easily be retrofit on virtually any stationary emission source without modification to the boiler, turbine, or steam piping.
« Leur façon de punir, c’est avec l’horaire ! » : Pratiques informelles de conciliation travail-famille au sein de commerces d’alimentation au Québec
Authors: Lefrançois Mélanie , Saint-Charles Johanne , Fortin Sylvie , des Rivières-Pigeon Catherine 
Published: August 2017

L’influence positive du soutien organisationnel par le biais d’attitudes et de pratiques favorables à la conciliation travail-famille (CTF) est largement reconnue. En revanche, peu d’études ont porté un regard spécifique sur les dynamiques entourant ces pratiques au sein de milieux où une organisation inflexible du temps de travail complique la manifestation de soutien à l’égard de la CTF, tout en créant des défis de conciliation importants. Réalisée en partenariat avec des syndicats québécois, cette étude s’intéresse aux pratiques informelles de CTF au sein de commerces d’alimentation québécois, un secteur d’emploi faiblement rémunéré où les horaires sont imposés, étendus, imprévisibles et variables.L’analyse thématique d’un corpus de trente entretiens semi-dirigés réalisés auprès de travailleuses syndiquées, de gestionnaires, de représentantes et de représentants syndicaux montre que, en dépit de règles liées à la convention collective, le mode d’établissement des horaires, en apparence neutre, témoigne de l’importance du caractère informel des pratiques de CTF. Ces dernières sont souvent individuelles, voire secrètes, et elles sont perçues comme le fruit d’un traitement privilégié accordé à certaines personnes. Compte tenu de l’accès restreint aux possibilités d’accommodements, ces pratiques peuvent entraîner une dynamique de « chacun pour soi », ce qui affecte la qualité des rapports entre collègues. Certaines mères de famille étaient particulièrement désavantagées par les normes de flexibilité valorisées dans leur milieu de travail. Enfin, des pratiques informelles sont acceptées au sein du collectif si elles sont transparentes et en autant que les gains des uns n’engendrent pas d’injustice perçue pour les autres.L’étude amène un éclairage sur l’impact collectif des pratiques informelles de CTF en contexte d’horaires atypiques, imprévisibles et variables. Elle montre la nécessité, pour les entreprises ainsi que pour les syndicats actifs dans ces milieux, de créer des conditions favorables au développement de relations interpersonnelles saines et équitables, ainsi que des pratiques qui valorisent l’expression des enjeux de CTF.
Apartheid en territoire autochtone : l’émergence de lois racistes chez les Cherokees au XIXe siècle
Authors: Laramée François Dominic 
Published: August 2017

Au tournant du XVIIIe siècle, les institutions politiques et sociales des Cherokees sont perturbées par une série de catastrophes militaires, économiques et démographiques. Une minorité inter-mariée avec les Blancs en profite pour instaurer une économie de plantations esclavagistes et une nouvelle forme de gouvernement qui la protège, notamment en dépouillant les descendants d’Africains des droits dont ils disposaient au sein de la nation. Cet article décrit le statut des Cherokees de descendance africaine au XVIIIe siècle, la prise de pouvoir par la nouvelle élite de planteurs, et le développement de lois discriminatoires qui en résulte.
Conflit basque et altérations de l’État de droit : de l’usage de la torture dans l’Espagne démocratique
Authors: Garbay-Douziech Aurélie 
Published: August 2017

Le conflit basque est un conflit dont on parle peu en dehors de son périmètre géographique, en dépit d’une mobilisation aujourd’hui internationale pour le faire évoluer vers une résolution. Né d’une opposition à la répression d’une dictature violente, mais perdurant alors que le régime espagnol s’est transformé en une démocratie parlementaire, le conflit basque révèle un paradoxe préoccupant. Ainsi qu’en témoignent notamment plusieurs condamnations prononcées par la Cour européenne des droits de l’homme (CEDH) pour méconnaissance de l’interdiction de la torture, droit absolument indérogeable quelles que soient les circonstances et reconnu à ce titre comme partie intégrante du « noyau dur » des droits de l’homme, l’appareil mis en place en Espagne face au terrorisme basque semble empreint de dysfonctionnements tels que, loin d’en assurer la protection, il semble au contraire porter fondamentalement atteinte à l’État de droit.
Du gangsta rap au hip-hop conscient : subversions et alternatives critiques en réponse aux mythes américains
Authors: Lessard Guillaume 
Published: August 2017

L’émergence du gangsta rap américain au tournant des années 1990 a stimulé des débats d’envergure nationale sur la question de la liberté d’expression. Bien que le hip-hop ait émergé victorieux de cette guerre culturelle, il semble que grâce à un procédé de marginalisation des discours jugés subversifs, le récit national américain soit demeuré largement inchangé face aux attaques du gangsta rap. Toutefois, avec l’émergence du hip-hop conscient, de nouveaux récits critiques contribuent à nuancer les mythes nationaux américains de l’intérieur et offrent des conceptions alternatives de l’identité américaine au travers de la culture hip-hop.
Advanced Photonic Processes for Photovoltaic and Energy Storage Systems
Authors: Sygletou Maria , Petridis Constantinos , Kymakis Emmanuel , Stratakis Emmanuel 
Published: August 2017

AbstractSolar‐energy harvesting through photovoltaic (PV) conversion is the most promising technology for long‐term renewable energy production. At the same time, significant progress has been made in the development of energy‐storage (ES) systems, which are essential components within the cycle of energy generation, transmission, and usage. Toward commercial applications, the enhancement of the performance and competitiveness of PV and ES systems requires the adoption of precise, but simple and low‐cost manufacturing solutions, compatible with large‐scale and high‐throughput production lines. Photonic processes enable cost‐efficient, noncontact, highly precise, and selective engineering of materials via photothermal, photochemical, or photophysical routes. Laser‐based processes, in particular, provide access to a plethora of processing parameters that can be tuned with a remarkably high degree of precision to enable innovative processing routes that cannot be attained by conventional approaches. The focus here is on the application of advanced light‐driven approaches for the fabrication, as well as the synthesis, of materials and components relevant to PV and ES systems. Besides presenting recent advances on recent achievements, the existing limitations are outlined and future possibilities and emerging prospects discussed.
Twist‐Elasticity‐Controlled Crystal Emission in Highly Luminescent Polymorphs of Cyano‐Substituted Distyrylbenzene (βDCS)
Authors: Shi Junqing , Yoon Seong‐Jun , Viani Lucas , Park Soo Young , Milián‐Medina Begoña , Gierschner Johannes 
Published: August 2017

AbstractThe occurrence of polymorphs in crystals of luminescent π‐conjugated organic materials is an intriguing matter, particularly because polymorphs can give rise to widely different broadband and amplified emission properties. Here, a new, highly luminescent polymorph of cyano‐substituted distyrylbenzene, being a prominent example of “twist elasticity”—the ability of a molecule to react to external constraints with substantial changes in the torsional coordinates, is investigated. The twist elasticity concept is fully explored here through molecular modeling by comparison of the new polymorph with two known ones exhibiting largely different intra‐ and intermolecular coordinates. In a second step, the impact of intra‐ and intermolecular contributions on the spontaneous and stimulated emission properties observed in the crystals is rationalized, being in all a crucial step in targeted design of optoelectronic materials.
Tunable Fluorescence Properties Due to Carbon Incorporation in Zinc Oxide Nanowires
Authors: Lim Kim Yong , Linghu Jiajun , Chi Xiao , Yuan Kaidi , Hew Kai Ming , Zheng Minrui , Yang Ming , Tok Eng Soon , Rusydi Andrivo , Yu Xiaojiang , Chen Wei , Feng Yuan Ping , Sow Chorng Haur 
Published: August 2017

AbstractIt is shown experimentally that carbon incorporation into zinc oxide (ZnO) nanowires (NWs) plays a crucial role in determining the NWs' fluorescence and photoluminescence properties. Through intentional adjustment of chemical vapor deposition growth parameters to allow for carbon incorporation, the ZnO NWs' fluorescence under ultraviolet excitation can be varied controllably from green to orange‐red. X‐ray photoelectron spectroscopy, X‐ray absorption spectroscopy, and transmission electron microscopy correlate carbon incorporation to a systematic shifting of ZnO NWs' fluorescence toward higher wavelengths. This is consistent with a previous theoretical prediction of orange‐red fluorescence arising from a carbon‐related defect within ZnO. In the present work, further computational results from simulation of high carbon content within the ZnO lattice yield additional carbon‐related defect species as possible origins of orange‐red fluorescence. Furthermore, the extent of simulated band gap energies can help explain the broad visible fluorescence spectrum from carbon incorporated ZnO. Additional experiments involving plasma etching and oxygen annealing agree with the inferences of carbon‐related defects as a source of variable visible‐light emissions.
Metal‐Free Nitration of the C(sp3)−H Bonds of 2‐Oxindoles through Radical Coupling Reaction at Room Temperature
Authors: Wei Wen‐Ting , Zhu Wen‐Ming , Ying Wei‐Wei , Wang Yi‐Ning , Bao Wen‐Hui , Gao Le‐Han , Luo Yun‐Jie , Liang Hongze 
Published: August 2017

AbstractA metal‐free nitration of the C(sp3)−H bonds of 2‐oxindoles with t‐BuONO through radical coupling reaction at room temperature has been developed. Using t‐BuONO both as a nitrating reagent and as an oxidant, to couple with the C(sp3)−H bonds of 2‐oxindoles, thus forming a new C−N bond without using any other reagents. This reaction provides a green and straightforward approach to some useful 3‐nitro‐2‐oxindoles in moderate to good yields.magnified image