| 1. |
- Antonopoulou, Io, 1989-, et al.
(author)
-
Single cell oil and ethanol production by the oleaginous yeast Trichosporon fermentans utilizing dried sweet sorghum stalks
- 2020
-
In: Renewable energy. - : Elsevier. - 0960-1481 .- 1879-0682. ; 146, s. 1609-1617
-
Journal article (peer-reviewed)abstract
- The ability of the oleaginous yeast Trichosporon fermentans to efficiently produce lipids when cultivated in dried sweet sorghum was evaluated. First, lipid production was evaluated in synthetic media mimicking the composition of sweet sorghum stalks and optimized based on the nitrogen source and C: N ratio. Under optimum conditions, the lipid production reached 3.66 g/L with 21.91% w/w lipid content by using a mixture of sucrose, glucose and fructose and peptone at C: N ratio 160. Cultivation on pre-saccharified sweet sorghum stalks offered 1.97 g/L, while it was found that sweet sorghum stalks can support yeast growth and lipid production without the need for external nitrogen source addition. At an attempt to increase the carbon source concentration for optimizing lipid production, the Crabtree effect was observed in T. fermentans. To this end, the yeast was evaluated for its potential to produce ethanol under anaerobic conditions in synthetic media and sweet sorghum. The ethanol concentration at 100 g/L glucose was 40.31 g/L, while utilizing sweet sorghum by adding a distinct saccharification step and external nitrogen source offered ethanol concentration equal to 23.5 g/L. To the authors’ knowledge, this is the first time that the Crabtree effect is observed in T. fermentans.
|
|
| 2. |
- Cortez, Daniel, et al.
(author)
-
The S-wave angle identifies arrhythmogenic right ventricular cardiomyopathy in patients with electrocardiographically concealed disease phenotype
- 2018
-
In: Journal of Electrocardiology. - : Elsevier BV. - 0022-0736 .- 1532-8430. ; 51:6, s. 1003-1008
-
Journal article (peer-reviewed)abstract
- Background: Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) carries risk of sudden death. We hypothesize that the S-wave angle differentiates ARVD/C with otherwise normal electrocardiograms from controls. Materials and methods: All patients met Task Force 2010 definite ARVD/C criteria. ARVD/C patients without Task Force depolarization/repolarization criteria (−ECG) were compared to controls. Electrocardiogram measures of QRS duration, corrected QT interval, and measured angle between the upslope and downslope of the S-wave in V2, were assessed. Results: Definite ARVD/C was present in 155 patients (42.7 ± 17.3 years, 68.4%male). −ECG ARVD/C patients (66 patients) were compared to 66 control patients (41.8 ± 17.6 years, 65.2%male). Only the S-wave angle differentiated −ECG ARVD/C patients from controls (<0.001) with AU the ROC curve of 0.77 (95%CI 0.53 to 0.71) and odds ratio of 28.3 (95%CI 6.4 to 125.5). Conclusion: ARVD/C may lead to development of subtle ECG abnormalities distinguishable using the S-wave angle prior to development of 2010 Taskforce ECG criteria.
|
|
| 3. |
- Griggio, Carla, et al.
(author)
-
A real-time dance visualization framework for the design of mappings that favor user appropriation
- 2015
-
Conference paper (peer-reviewed)abstract
- In this paper we present a real-time dance visualization framework with the goal of easily mapping motion data from an accelerometer and a gyroscope into visual effects that users can compose and appropriate to their own dancing style. We used this framework to design a set of dance-tovisuals mappings through a user-centered approach. As a result, we conclude with a list of factors that help users to understand how to interact with a real-time dance visualization with no prior instructions.
|
|
| 4. |
- Folsom, C. P., et al.
(author)
-
Magnetic field, chemical composition and line profile variability of the peculiar eclipsing binary star AR Aur
- 2010
-
In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 407:4, s. 2383-2392
-
Journal article (peer-reviewed)abstract
- AR Aur is the only eclipsing binary known to contain a HgMn star, making it an ideal case for a detailed study of the HgMn phenomenon. HgMn stars are a poorly understood class of chemically peculiar stars, which have traditionally been thought not to possess significant magnetic fields. However, the recent discovery of line profile variability in some HgMn stars, apparently attributable to surface abundance patches, has brought this belief into question. In this paper we investigate the chemical abundances, line profile variability, and magnetic field of the primary and secondary of the AR Aur system, using a series of high-resolution spectropolarimetric observations. We find the primary is indeed a HgMn star, and present the most precise abundances yet determined for this star. We find the secondary is a weak Am star, and is possibly still on the pre-main sequence. Line profile variability was observed in a range of lines in the primary, and is attributed to inhomogeneous surface distributions of some elements. No magnetic field was detected in any observation of either stars, with an upper limit on the longitudinal magnetic field in both stars of 100 G. Modelling of the phase-resolve longitudinal field measurements leads to a 3 Sigma upper limit on any dipole surface magnetic field of about 400 G.
|
|
| 5. |
- Folsom, C. P., et al.
(author)
-
Magnetic fields and chemical peculiarities of the very young intermediate-mass binary system HD 72106
- 2008
-
In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 391:2, s. 901-914
-
Journal article (peer-reviewed)abstract
- The recently discovered magnetic Herbig Ae and Be stars may provide qualitatively new information about the formation and evolution of magnetic Ap and Bp stars. We have performed a detailed investigation of one particularly interesting binary system with a Herbig Ae secondary and a late B-type primary possessing a strong, globally ordered magnetic field. 20 high-resolution Stokes V spectra of the system were obtained with the ESPaDOnS instrument mounted on the Canada-France-Hawaii Telescope. In these observations we see clear evidence for a magnetic field in the primary, but no evidence for a magnetic field in the secondary. A detailed abundance analysis was performed for both stars, revealing strong chemical peculiarities in the primary and normal chemical abundances in the secondary. The primary is strongly overabundant in Si, Cr and other iron-peak elements, as well as Nd, and underabundant in He. The primary therefore appears to be a very young Bp star. In this context, line profile variations of the primary suggest non-uniform lateral distributions of surface abundances. Interpreting the 0.639 95 +/- 0.000 09 d variation period of the Stokes I and V profiles as the rotational period of the star, we have modelled the magnetic field geometry and the surface abundance distributions of Si, Ti, Cr and Fe using magnetic Doppler imaging. We derive a dipolar geometry of the surface magnetic field, with a polar strength B-d = 1230 G and an obliquity beta = 57 degrees. The distributions Ti, Cr and Fe are all qualitatively similar, with an elongated patch of enhanced abundance situated near the positive magnetic pole. The Si distribution is somewhat different, and its relationship to the magnetic field geometry less clear.
|
|
| 6. |
- Folsom, C. P., et al.
(author)
-
Orbital parameters, chemical composition and magnetic field of the Ap binary HD 98088
- 2013
-
In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 431:2, s. 1513-1527
-
Journal article (peer-reviewed)abstract
- HD 98088 is a synchronized, double-lined spectroscopic binary system with a magnetic Ap primary component and an Am secondary component. We study this rare system using high-resolution Multi-Site Continuous Spectroscopy spectropolarimetric data, to gain insight into the effect of binarity on the origin of stellar magnetism and the formation of chemical peculiarities in A-type stars. Using a new collection of 29 high-resolution Stokes VQU spectra we re-derive the orbital and stellar physical parameters and conduct the first disentangling of spectroscopic observations of the system to conduct spectral analysis of the individual stellar components. From this analysis we determine the projected rotational velocities of the stars and conduct a detailed chemical abundance analysis of each component using both the SYNTH3 and ZEEMAN spectrum synthesis codes. The surface abundances of the primary component are typical of a cool Ap star, while those of the secondary component are typical of an Am star. We present the first magnetic analysis of both components using modern data. Using least-squares deconvolution, we extract the longitudinal magnetic field strength of the primary component, which is observed to vary between +1170 and -920 G with a period consistent with the orbital period. There is no field detected in the secondary component. The magnetic field in the primary is predominantly dipolar, with the positive pole oriented approximately towards the secondary.
|
|
| 7. |
- Folstad, Asbjorn, et al.
(author)
-
How HCI-practitioners want to evaluate their own practice
- 2006
-
In: NordiCHI 2006. - New York, NY, USA : ACM New York. - 1595933255 ; , s. 417-420
-
Conference paper (peer-reviewed)abstract
- How do individual HCI-practitioners evaluate their own work practice? And how would they like to evaluate it? Answers to these questions will give new knowledge on the state-of-the-practice in this area, and provide insight for researchers trying to improve practitioners' ability to evaluate their development project activities. The questions were investigated through questionnaire survey responses of 179 HCI-practitioners from the Nordic countries. It was found that the general maturity for evaluation of own practice were fairly high. However, the results indicate that HCI-practitioners tend not to evaluate their practice with regard to its impact on the development team and project leader; which may be counter productive to the downstream utility of HCI activities. Presentation of ongoing development of evaluation procedures, based on the results, will be included in the talk at NordiCHI 2006.
|
|
| 8. |
- Krumlinde, Patrik, 1976-
(author)
-
Transition metal- and lipase-catalyzed reactions : Dynamic resolutions, hydrogen transfer and enzyme engineering
- 2009
-
Doctoral thesis (other academic/artistic)abstract
- This thesis mainly focuses on chemoenzymatic processes and can be divided into three parts: The first part of the thesis, chapters 2-4, is devoted to the development of combined ruthenium- and enzyme-catalyzed dynamic processes. In these processes the metal catalyst racemizes (epimerizes) the alcohol substrate via hydrogen transfer and the enzyme transforms the substrate into enantiomerically enriched product. Chapter 2 focuses on bicyclic diols, where a process was developed to provide the enantiomerically pure product diacetates in high yield. The diacetates were then hydrolyzed using various protocols to yield the corresponding enantio- and diastereoenriched diols. Two of the substrates were mono-oxidized to yield the enantioenriched hydroxyketones in high yield. One of the hydroxyketones was subsequently employed in the formal synthesis of Sertraline in a highly enantioselective manner. Chapter 3 deals with the application of dynamic kinetic resolution in the synthesis of a pesticide derivative, which is obtained in high yield and high enantiomeric excess. Chapter 4 describes the use of dynamic kinetic resolution to set the configuration of a non-activated stereocenter in primary alcohols by taking advantage of the intermediate aldehydes intrinsic enolization behavior. A wide range of primary alcohols with a stereogenic center in β-position were dynamically resolved using this approach. The second part, chapters 5-6, deals with different types of enzyme engineering. In chapter 5, a lipase from Pseudomonas aeruginosa was mutated using directed evolution to increase the enantioselectivity of the lipase towards an allenic substrate. In chapter 6, a racemization catalyst was anchored to the active site of both cutinase and Candida Antarctica lipase. In the last part, chapter 7, an immobilized transition metal catalyst was used in transfer hydrogenation, a process which is closely related to the racemization of alcohols. The catalyst was used to reduce carbonyl compounds to the corresponding alcohols and was applicable to a wide range of substrates.
|
|
| 9. |
- Chuchiak, John F., et al.
(author)
-
Introduction: Mesoamerican Medicine, Ancient and Contemporary
- 2006
-
In: Acta Americana: journal of the Swedish Americanist Society : revista de la Sociedad Sueca de Americanistas. - : The Swedish Americanist Society. ; 10:1-2: Continuities and Changes in Mesoamerican Medicinal Practice
-
Journal article (peer-reviewed)abstract
- This article introduces the Conference theme and the over all theme of the articles in this Double Volume, of Acta Americana which also is a Special Issue with contributions from the International Conference of the American Anthropological Association, that was held in New Orleans in November 2002, organized by John F. Chuchiak, Missouri State University, and Servando Hinojosa, Texas PanAm University. All these contributions are focused on various categories of medicinal rituals found in the Mesoamerican area, but the majority of those focuses on Maya rituals. Also the perspectives in the articles varies from ancient time to present time and in many cases the researchers argues for a long term continuity in these rituals, based on both archival records, epigraphy, iconography and contemporary fieldwork.
|
|
| 10. |
- Folsom, B. T., et al.
(author)
-
Stripping mechanisms and remediation for H- beams
- 2021
-
In: Physical Review Accelerators and Beams. - : American Physical Society. - 2469-9888. ; 24:7
-
Journal article (peer-reviewed)abstract
- Negative hydrogen ions are often used for injecting protons from linacs to storage rings via chargeexchange injection. In this process, the two electrons are stripped by a foil or laser to produce protons which can be merged with an existing beam without significantly affecting its dynamics, allowing high intensities of protons to be accumulated. However, this capability comes with the drawback that the outer electron of an H- ion has a low binding energy and can easily be stripped away prior to injection. This paper addresses the following stripping mechanisms: interactions with residual gas in the beam pipe, blackbody radiation from accelerator components, and electromagnetic fields from accelerator optics (Lorentz-force stripping) and particles within the bunch itself (intrabeam stripping); with a discussion on how to avoid excessive activation from stripped H degrees particles and protons. We also demonstrate that the proportion of stripped H degrees colliding with a nearby beam pipe or machine-element walls presents only roughly 10% of those lost in stripping; the remaining stripped particles traverse to the end of a linac or local straight section, which may relax the limits for allowable stripping-based beam loss in H- accelerators.
|
|
