scholarly journals New insights into the role of solution additive anions in Mg2+ dehydration: implications for mineral carbonation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Dimitrios Toroz ◽  
Fu Song ◽  
Gregory A. Chass ◽  
Devis Di Tommaso

Computer simulations of the Mg2+ dehydration mechanism show that solution additives can stabilise undercoordinated Mg2+ hydration configurations, opening up coordination sites on the central Mg2+ ion, promoting Mg-carbonates nucleation and growth.

2021 ◽  
Vol 13 (10) ◽  
pp. 5588
Author(s):  
Anita Tvedt Crisostomo ◽  
Anne B. Reinertsen

In this article, we seek to theorize the role of the kindergarten teacher as an agency mobiliser for sustainability through keeping the concept of the child in play, ultimately envisioning the child as a knowledgeable and connectable collective. This implies a non-dialectical politics of multiplicity ready to support and join a creative pluralism of educational organization and teacher roles for sustainability. Comprising friction zones between actual and virtual multiplicities that replace discursive productions of educational policies with enfoldedness, relations between bodies and becomings. This changes the power, position and function of language in and for agency and change. Not through making the child a constructivist change-agent through language but through opening up the possibilities for teachers to explore relations between language and matter, nature and culture and what might be produced collectively and individually. We go via the concepts of agencement expanding on the concept of agency, and conceptual personae directing the becoming of the kindergarten teacher. Both concepts informed by the transformational pragmatics of Gilles Deleuze (1925–1995) and Félix Guattari (1930–1992). The overarching contribution of this article is therefore political and pragmatic and concerns the constitution of subjectivity and transformative citizenships for sustainability in inter- and intra-generational perspectives.


AI Magazine ◽  
2015 ◽  
Vol 36 (3) ◽  
pp. 49-60 ◽  
Author(s):  
Randall Davis ◽  
David Libon ◽  
Roda Au ◽  
David Pitman ◽  
Dana Penney

The digital clock drawing test is a fielded application that provides a major advance over existing neuropsychological testing technology. It captures and analyzes high precision information about both outcome and process, opening up the possibility of detecting subtle cognitive impairment even when test results appear superficially normal. We describe the design and development of the test, document the role of AI in its capabilities, and report on its use over the past seven years. We outline its potential implications for earlier detection and treatment of neurological disorders. We set the work in the larger context of the THink project, which is exploring multiple approaches to determining cognitive status through the detection and analysis of subtle behaviors.


2016 ◽  
Vol 6 (2-3) ◽  
pp. 101-108
Author(s):  
Marc Belissa ◽  
Gary Berton

The volume contains six contributions (and an introduction) that have been presented in the Thomas Paine Second International Conference held in Paris Ouest Nanterre in 2014. All scholars involved in the field of research of Atlantic history agree on the fact that the partitioning between ‘national’ historiographies (American, English and French) is detrimental in the understanding of the role of specific transatlantic actors, of which Thomas Paine is one the most spectacular example for the era of the revolutions (1760–1830). This conference gathered American, British and French historians to develop this fruitful approach. The papers presented here participate in the historiographic opening up of studies on Thomas Paine and propose studies, reflexion and specific comments on how Thomas Paine converges within the general framework of Atlantic history and Republicanism history.


ChemInform ◽  
2003 ◽  
Vol 34 (42) ◽  
Author(s):  
Elena V. Shevchenko ◽  
Dmitri V. Talapin ◽  
Heimo Schnablegger ◽  
Andreas Kornowski ◽  
Oerjan Festin ◽  
...  

1993 ◽  
Vol 310 ◽  
Author(s):  
Toshihiko Tani ◽  
Zhengkui Xu ◽  
David A. Payne

AbstractPLZT thin layers were deposited onto various substrates by sol-gel methods, and crystallized under different conditions and substrate treatments. Relationships are given for the chemical characteristics of the substrate's surface and the preferred orientations which develop on heat treatment. A preferred (111) orientation always developed for perovskite crystallized on Pt layers which contained Ti on the surface. This was attributed to the formation of Pt3Ti and the role of heteroepitaxial nucleation and growth sites. In addition, a preferred (100) orientation was also obtained on unannealed Pt/Ti/SiO2/Si substrates which were free of Ti on the surface. This was attributed to self-textured growth with flat faces striving for minimum surface energy conditions. The results are discussed in terms of the importance of interfacial chemistry on the control of texture for crystallization of PLZT thin layers on coated substrates.


2017 ◽  
Vol 7 (2) ◽  
pp. 20160151 ◽  
Author(s):  
Angela Logan ◽  
Michael P. Murphy

Our understanding of the role of mitochondria in biomedical sciences has expanded considerably over the past decade. In addition to their well-known metabolic roles, mitochondrial are also central to signalling for various processes through the generation of signals such as ROS and metabolites that affect cellular homeostasis, as well as other processes such as cell death and inflammation. Thus, mitochondrial function and dysfunction are central to the health and fate of the cell. Consequently, there is considerable interest in better understanding and assessing the many roles of mitochondria. Furthermore, there is also a growing realization that mitochondrial are a promising drug target in a wide range of pathologies. The application of interdisciplinary approaches at the interface between chemistry and biology are opening up new opportunities to understand mitochondrial function and in assessing the role of the organelle in biology. This work and the experience thus gained are leading to the development of new classes of therapies. Here, we overview the progress that has been made to date on exploring the chemical biology of the organelle and then focus on future challenges and opportunities that face this rapidly developing field.


2021 ◽  
Vol 10 (1) ◽  
pp. 768-778
Author(s):  
Shaoqiang Meng ◽  
Xiaowei Ouyang ◽  
Jiyang Fu ◽  
Yanfei Niu ◽  
Yuwei Ma

Abstract Graphene (G) and graphene oxide (GO) have been shown to significantly improve the mechanical properties of cement-based materials. In this study, the effect of the G/GO on cement hydration was investigated. First, the zeta potential of G/GO in simulated solutions was tested, and the interaction between G/GO’s surface and Ca2+ was explored. Subsequently, scanning electron microscopy was used to observe the morphology of C–S–H nucleation and growth on the cement surface in the cement paste containing G/GO. Furthermore, XRD and TGA analyses were carried out on the hydration products of the sample. At last, isothermal calorimetry was applied to investigate the influence of G/GO on the early hydration of cement. The results showed that the addition of G/GO significantly accelerates C–S–H nucleation and growth on the cement surface. It is indicated that the high mobility ions derived by G/GO in the cement paste dominate the reason for the accelerated hydration of cement. The presence of G, especially GO, facilitates the mobility of ions, especially Ca2+, thus enhances the interaction between the cement surface and the ions. This strong interaction promotes the C–S–H nucleation and growth, and therefore, the hydration of the cement.


2021 ◽  
Vol 3 (2) ◽  
pp. 223-239
Author(s):  
Bakhtawar Ijaz ◽  
Noman Arshed ◽  
Zamin Abbas ◽  
Uzma Hanif ◽  
Kamran Hameed

Recent developments which were coined to the opening up of borders have attracted interest of many researchers from many disciplines. A lot of work can be observed regarding the role of globalization / internationalization on economic growth and social development, this study specifically explores the implications of globalization on the ultimate goal that is life longevity. Adapting from the Kuznets curve, this study proposed a quadratic function of economic globalization and life longevity. The results using panel the ARDL model for the SAARC region, it can be seen that expansion of trade globalization de jure and management of financial globalization de facto and de jure may help them to increase longevity in the long run.


2005 ◽  
Vol 29 (3) ◽  
pp. 144-150 ◽  
Author(s):  
Alice W. Ra'anan

Laboratory exercises are intended to illustrate concepts and add an active learning component to courses. Since the 1980s, there has been a decline in animal laboratories offered in conjunction with medical physiology courses. The most important single reason for this is cost, but other contributing factors include the development of computer simulations, changes in medical education, and pressure from antivivisectionists. Unfortunately, the elimination of animal laboratories has occurred with relatively little consideration of the educational impact of this change. Although computer simulations are considered effective in helping students acquire basic physiological concepts, there is evidence some students acquire a more thorough understanding of the material through the more advanced and challenging experience of an animal laboratory. The fact that such laboratories offer distinct educational advantages should be taken into account when courses are designed.


Lithos ◽  
2018 ◽  
Vol 296-299 ◽  
pp. 532-546 ◽  
Author(s):  
P. Pleše ◽  
M.D. Higgins ◽  
L. Mancini ◽  
G. Lanzafame ◽  
F. Brun ◽  
...  

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