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- Budarin, Vitaliy L, et al.
(författare)
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Processed Lignin as a Byproduct of the Generation of 5-(Chloromethyl)furfural from Biomass : A Promising New Mesoporous Material.
- 2015
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Ingår i: ChemSusChem. - : John Wiley & Sons. - 1864-5631 .- 1864-564X. ; 8:24, s. 4172-9
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Tidskriftsartikel (refereegranskat)abstract
- The lignin by-product of the conversion of lignocellulosic biomass to 5-(chloromethyl)furfural (CMF) has been characterised by thermogravimetric analysis, N2 physisorption porosimetry, attenuated internal reflectance IR spectroscopy, elemental analysis and solid-state NMR spectroscopy. The lignin (LCMF) has a moderate level of mesoporosity before thermal treatment and a surface area of 63 m(2) g(-1) , which increases dramatically on pyrolysis at temperatures above 400 °C. An assessment of the functionality and textural properties of the material was achieved by analysing LCMF treated thermally over a range of pyrolysis temperatures. Samples were sulfonated to test their potential as heterogeneous acid catalysts in the esterification of levulinic acid. It was shown that unpyrolysed catalysts gave the highest ester yields of up to 93 %. To the best of our knowledge, this is the first example of mesoporous lignin with an appreciable surface area that is produced directly from a bio-refinery process and with further textural modification of the material demonstrated.
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| 2. |
- Langfeldt, Liv, et al.
(författare)
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Co-existing Notions of Research Quality : A framework to study context-specific understandings of good research
- 2020
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Ingår i: Minerva. - : Springer Nature. - 0026-4695 .- 1573-1871. ; 58:1, s. 115-137
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Tidskriftsartikel (refereegranskat)abstract
- Notions of research quality are contextual in many respects: they varybetween fields of research, between review contexts and between policy contexts.Yet, the role of these co-existing notions in research, and in research policy, ispoorly understood. In this paper we offer a novel framework to study and understandresearch quality across three key dimensions. First, we distinguish betweenquality notions that originate in research fields (Field-type) and in research policyspaces (Space-type). Second, drawing on existing studies, we identify three attributes(often) considered important for ‘good research’: its originality/novelty, plausibility/reliability, and value or usefulness. Third, we identify five different sites wherenotions of research quality emerge, are contested and institutionalised: researchersthemselves, knowledge communities, research organisations, funding agencies andnational policy arenas. We argue that the framework helps us understand processesand mechanisms through which ‘good research’ is recognised as well as tensionsarising from the co-existence of (potentially) conflicting quality notions.
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| 3. |
- Mills, Bethany, et al.
(författare)
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Molecular detection of Gram-positive bacteria in the human lung through an optical fiber-based endoscope
- 2021
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Ingår i: European Journal of Nuclear Medicine and Molecular Imaging. - : Springer Nature. - 1619-7070 .- 1619-7089. ; 48:3, s. 800-807
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Tidskriftsartikel (refereegranskat)abstract
- Purpose The relentless rise in antimicrobial resistance is a major societal challenge and requires, as part of its solution, a better understanding of bacterial colonization and infection. To facilitate this, we developed a highly efficient no-wash red optical molecular imaging agent that enables the rapid, selective, and specific visualization of Gram-positive bacteria through a bespoke optical fiber-based delivery/imaging endoscopic device. Methods We rationally designed a no-wash, red, Gram-positive-specific molecular imaging agent (Merocy-Van) based on vancomycin and an environmental merocyanine dye. We demonstrated the specificity and utility of the imaging agent in escalating in vitro and ex vivo whole human lung models (n = 3), utilizing a bespoke fiber-based delivery and imaging device, coupled to a wide-field, two-color endomicroscopy system. Results The imaging agent (Merocy-Van) was specific to Gram-positive bacteria and enabled no-wash imaging ofS. aureuswithin the alveolar space of whole ex vivo human lungs within 60 s of delivery into the field-of-view, using the novel imaging/delivery endomicroscopy device. Conclusion This platform enables the rapid and specific detection of Gram-positive bacteria in the human lung.
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