| 1. |
- Ingels, Jr, Neil B, et al.
(författare)
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Chapter 24 Posterior Leaflet Open
- 2016
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Ingår i: Mitral Valve Mechanics. - : Linköping University Electronic Press. - 9789176859520 ; , s. 24.1-24.3
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- We begin by examining the maximum extent of posterior leaflet opening relative to the mitral annulus. To view this, in each sample frame we performed a translation to place Marker #22 at the origin, perform 2 rotations to place Marker #18 on the x-axis, then performed a final rotation to place anterior commissure Marker #16 into the x-y plane. This placed the mitral annulus into the x-y plane (to very close approximation) at each sample time. We then view the resulting mitral valve geometry along the z-axis, looking from the left atrium toward the left ventricle. Appendix E provides frame-by-frame animations showing the geometry of the mitral valve as described by three-dimensional cubic splines passing through connected marker locations during a representative beat (from maximum LVP in one beat to maximum LVP in the following beat) for the hearts studied in this fashion.
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| 2. |
- Eivazihollagh, Alireza, et al.
(författare)
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On chelating surfactants : Molecular perspectives and application prospects
- 2019
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Ingår i: Journal of Molecular Liquids. - : Elsevier BV. - 0167-7322 .- 1873-3166. ; 278, s. 688-705
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Tidskriftsartikel (refereegranskat)abstract
- Chelating agents, molecules that very strongly coordinates certain metal ions, are used industrially as well as in consumer products to minimize disturbances and increase performance of reactions and applications. The widely used sequestering agents, nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) belong to this branch of readily water-soluble compounds. When these chemical structures also have hydrophobic parts, they are prone to adsorb at air-water interfaces and to self-assemble. Such bifunctional molecules can be called chelating surfactants and will have more extended utilization prospects than common chelating agents or ordinary ionic surfactants. The present review attempts to highlight the fundamental behavior of chelating surfactants in solution and at interfaces, and their very specific interactions with metal ions. Methods to recover chelating surfactants from metal chelates are also described. Moreover, utilization of chelating surfactants in applications for metal removal in environmental engineering and mineral processing, as well as for metal control in the fields of biology, chemistry and physics, is exemplified and discussed.
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| 3. |
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| 4. |
- Winikka, Henrik, et al.
(författare)
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Particle formation during pressurized entrained flow gasification of wood powder : Effects of process conditions on chemical composition, nanostructure, and reactivity
- 2018
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Ingår i: Combustion and Flame. - : Elsevier BV. - 0010-2180 .- 1556-2921. ; 189, s. 1339-1351
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Tidskriftsartikel (refereegranskat)abstract
- The influence of operating condition on particle formation during pressurized, oxygen blown gasification of wood powder with an ash content of 0.4 wt% was investigated. The investigation was performed with a pilot scale gasifier operated at 7 bar(a). Two loads, 400 and 600 kW were tested, with the oxygen equivalence ratio (λ) varied between 0.25 and 0.50. Particle concentration and mass size distribution was analyzed with a low pressure cascade impactor and the collected particles were characterized for morphology, elemental composition, nanostructure, and reactivity using scanning electron microscopy/high resolution transmission electron microscopy/energy dispersive spectroscopy, and thermogravimetric analysis. In order to quantify the nanostructure of the particles and identify prevalent sub-structures, a novel image analysis framework was used. It was found that the process temperature, affected both by λ and the load of the gasifier, had a significant influence on the particle formation processes. At low temperature (1060 °C), the formed soot particles seemed to be resistant to the oxidation process; however, when the oxidation process started at 1119 °C, the internal burning of the more reactive particle core began. A further increase in temperature (> 1313 °C) lead to the oxidation of the less reactive particle shell. When the shell finally collapsed due to severe oxidation, the original soot particle shape and nanostructure also disappeared and the resulting particle could not be considered as a soot anymore. Instead, the particle shape and nanostructure at the highest temperatures (> 1430 °C) were a function of the inorganic content and of the inorganic elements the individual particle consisted of. All of these effects together lead to the soot particles in the real gasifier environment having less and less ordered nanostructure and higher and higher reactivity as the temperature increased; i.e., they followed the opposite trend of what is observed during laboratory-scale studies with fuels not containing any ash-forming elements and where the temperature was not controlled by λ.
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| 5. |
- Sepehri, Sobhan, 1986, et al.
(författare)
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Volume-amplified magnetic bioassay integrated with microfluidic sample handling and high-Tc SQUID magnetic readout
- 2018
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Ingår i: APL Bioengineering. - : AIP Publishing. - 2473-2877. ; 2:1
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Tidskriftsartikel (refereegranskat)abstract
- A bioassay based on a high-Tc superconducting quantum interference device (SQUID) reading out functionalized magnetic nanoparticles (fMNPs) in a prototype microfluidic platform is presented. The target molecule recognition is based on volume amplification using padlock-probe-ligation followed by rolling circle amplification (RCA). The MNPs are functionalized with single-stranded oligonucleotides, which give a specific binding of the MNPs to the large RCA coil product, resulting in a large change in the amplitude of the imaginary part of the ac magnetic susceptibility. The RCA products from amplification of synthetic Vibrio cholera target DNA were investigated using our SQUID ac susceptibility system in microfluidic channel with an equivalent sample volume of 3 μl. From extrapolation of the linear dependence of the SQUID signal versus concentration of the RCA coils, it is found that the projected limit of detection for our system is about 1.0 e5 RCA coils (0.2e−18 mol), which is equivalent to 66 fM in the 3 μl sample volume. This ultra-high magnetic sensitivity and integration with microfluidic sample handling are critical steps towards magnetic bioassays for rapid detection of DNA and RNA targets at the point of care.
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| 6. |
- Mellin, Pelle, 1985-, et al.
(författare)
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Nano-sized by-products from metal 3D printing, composite manufacturing and fabric production
- 2016
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Ingår i: Journal of Cleaner Production. - Sweden : Elsevier. - 0959-6526 .- 1879-1786. ; 139, s. 1224-1233
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Tidskriftsartikel (refereegranskat)abstract
- Recently, the health and environmental perspective of nano-materials has gained attention. Most previous work focused on Engineered Nanoparticles (ENP). This paper examines some recently introduced production routes in terms of generated nano-sized by-products. A discussion on the hazards of emitting such particles and fibers is included. Fine by-products were found in recycled metal powder after 3D printing by Selective Laser Melting (SLM). The process somehow generated small round metal particles (~1e2 mm) that are possibly carcinogenic and respirable, but not small enough to enter by skin-absorption. With preventive measures like closed handling and masks, any health related effects can be prevented. The composite manufacturing in particular generated ceramic and carbonaceous particles that are very small and respirable but do not appear to be intrinsically toxic. The smallest features in agglomerates were about 30 nm. Small particles and fibers that were not attached in agglomerates were found in a wide range of sizes, from 1 μm and upwards. Preventive measures like closed handling and masks are strongly recommended. In contrast, the more traditional production route of fabric production is investigated. Here, brushing residue and recycled wool from fabric production contained few nano-sized by-products.
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| 9. |
- Landqvist, Hans, 1958, et al.
(författare)
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Intresse och engagemang: Kungliga Tekniska högskolans insatser i ett svenskt terminologiskt nätverk 1941–1983 : Interest and involvement: the contributions of the Royal Institute of Technology to a Swedish terminological network 1941–1983
- 2021
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Ingår i: Folkmålsstudier Meddelanden från Föreningen för nordisk filologi. - 0356-1771. ; 59, s. 103-133
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we study how KTH Royal Institute of Technology (Kungliga Tekniska högskolan – KTH) has participated in and influenced terminology work coordinated by the national terminology centre, the Swedish Centre for Technical Terminology – the TNC, in Sweden during the period 1941–1983. The aim of this paper is to shed light on the development of Swedish (technical) terminology based on networking and experts’ efforts. Based on archive material, we analyze who have been the active KTH experts, in what ways they were involved in the development processes and what effects their efforts had on the term recommendations given by the TNC. The archive material consists of written documents relating to the work process developed by John Wennerberg, who led the TNC between 1941 and 1957. The process was carried out in the form of 373 formal survey letters representing 17 subject fields, with both the TNC and external parties participating. Our results show that the 31 identified KTH experts play a visible role in the processes by 480 received survey letters within 14 subject fields. The response rate, 80 percent, reveal the experts’ involvement in the process and their high esteem of TNC’s work. The analysis of the comprehensive survey letter R198 shows that Wennerberg has considered the experts’ answers regarding terms (selection, linguistic form, acceptance/discourage) and definitions when he has published TNC’s recommendations. Our study shows that networking and experts representing the educational sector and furthermore universities have been an inseparable part of the development of Swedish (technical) terminology during several decades when the national terminology centre in Sweden began to operate and the working methods were established.
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| 10. |
- Nissilä, Niina, et al.
(författare)
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”Av intresse för saken dristar jag mig att till diskussion framlägga ett par spörsmål” – Kaksi suomalaista akateemista uranuurtajaa terminologiaverkoston kirjeenvaihdossa
- 2021
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Ingår i: Workplace Communication IV (VAKKI Publications 13.) Eds H. Katajamäki, M. Enell-Nilsson, H. Kauppinen-Räisänen, L. Kääntä & H. Salovaara. - 2242-6841 .- 2242-685X. ; 13
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Tidskriftsartikel (refereegranskat)abstract
- The Swedish Tekniska Nomenklaturcentralen TNC (2000–2018 Terminologicentrum TNC) has been Sweden's national center for special languages and terminology work for more than 75 years. Since its founding in 1941, the TNC has been active not only in Sweden, but also in establishing and maintaining international contacts. The article describes the contacts between actors in the Swedish and Finnish terminology field, looking in particular at the contacts between the TNC and actors in the Finnish higher education sector between the 1940s and the 1990s. The method utilized is close reading and content analysis. The research material used is the collection of foreign correspondence in the TNC's document archive, and in particular the section stored in connection with the code Ufin, i.e. sections concerning communication between the TNC and Finnish actors. The article describes the topics covered in the communication, the objectives and consequences of the communication and the results achieved. The article focuses especially on the contacts between the TNC and two active actors in Finland, professor Jarl Salin at the Åbo Akademi University and professor Christer Laurén at the University of Vaasa. In the analysis, the Ufin themes of the letters were categorized in four main categories: publications, communication, information and language issues. In professor Jarl Salins letters, the most common theme were language issues, whereas Professor Christer Laurén contacted TNC especially in connection with publications and publishing.
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