| 1. |
- Baur, Philipp, et al.
(författare)
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Possible Functional Roles of Patellamides in the Ascidian-Prochloron Symbiosis
- 2022
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Ingår i: Marine Drugs. - : MDPI AG. - 1660-3397. ; 20:2
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Tidskriftsartikel (refereegranskat)abstract
- Patellamides are highly bioactive compounds found along with other cyanobactins in the symbiosis between didemnid ascidians and the enigmatic cyanobacterium Prochloron. The biosynthetic pathway of patellamide synthesis is well understood, the relevant operons have been identified in the Prochloron genome and genes involved in patellamide synthesis are among the most highly transcribed cyanobacterial genes in hospite. However, a more detailed study of the in vivo dynamics of patellamides and their function in the ascidian-Prochloron symbiosis is complicated by the fact that Prochloron remains uncultivated despite numerous attempts since its discovery in 1975. A major challenge is to account for the highly dynamic microenvironmental conditions experienced by Prochloron in hospite, where light-dark cycles drive rapid shifts between hyperoxia and anoxia as well as pH variations from pH ~6 to ~10. Recently, work on patellamide analogues has pointed out a range of different catalytic functions of patellamide that could prove essential for the ascidian-Prochloron symbiosis and could be modulated by the strong microenvironmental dynamics. Here, we review fundamental properties of patellamides and their occurrence and dynamics in vitro and in vivo. We discuss possible functions of patellamides in the ascidian-Prochloron symbiosis and identify important knowledge gaps and needs for further experimental studies.
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| 2. |
- Heck, Philipp R., et al.
(författare)
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Noble gases in fossil micrometeorites and meteorites from 470 Myr old sediments from southern Sweden, and new evidence for the L-chondrite parent body breakup event
- 2008
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Ingår i: Meteoritics and Planetary Science. - 1086-9379. ; 43:3, s. 517-528
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Tidskriftsartikel (refereegranskat)abstract
- We present noble gas analyses of sediment-dispersed extraterrestrial chromite grains recovered from similar to 470 Myr old sediments from two quarries (Hallekis and Thorsberg) and of relict chromites in a coeval fossil meteorite from the Gullhogen quarry, all located ill Southern Sweden. Both the sediment-dispersed grains and the meteorite Gullhogen 001 were generated in the L-chondrite parent body breakup about 470 Myr ago, which was also the event responsible for the abundant fossil meteorites previously found in the Thorsberg quarry. Trapped solar noble gases in the sediment-dispersed chromite grains have partly been retained during similar to 470 Myr of terrestrial residence and despite harsh chemical treatment in the laboratory. This shows that chromite is highly retentive for solar noble gases. The solar noble gases imply that a sizeable fraction of the sediment-dispersed chromite grains are micrometeorites or fragments thereof rather than remnants of larger meteorites. The grains in the oldest sediment beds were rapidly delivered to Earth likely by direct injection into all orbital resonance in the inner asteroid belt, whereas grains in younger sediments arrived by orbital decay due to Poynting-Robertson (P-R) drag. The fossil meteorite Gullhogen 001 has a low cosmic-ray exposure age of similar to 0.9 Myr, based on new He and Ne production rates in chromite determined experimentally. This age is comparable to the ages of the fossil meteorites from Thorsberg, providing additional evidence for very rapid transfer times of material after the L-chondrite parent body breakup.
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| 3. |
- Hudson, Lawrence N, et al.
(författare)
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The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project
- 2017
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Ingår i: Ecology and Evolution. - : John Wiley & Sons. - 2045-7758. ; 7:1, s. 145-188
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Tidskriftsartikel (refereegranskat)abstract
- The PREDICTS project-Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)-has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional statistical models of how local biodiversity responds to these measures. We describe and make freely available this 2016 release of the database, containing more than 3.2 million records sampled at over 26,000 locations and representing over 47,000 species. We outline how the database can help in answering a range of questions in ecology and conservation biology. To our knowledge, this is the largest and most geographically and taxonomically representative database of spatial comparisons of biodiversity that has been collated to date; it will be useful to researchers and international efforts wishing to model and understand the global status of biodiversity.
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| 4. |
- Persson Stache, Anette, et al.
(författare)
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University-Industry Cooperation in Latin America: lessons learned from applying the AIMday methodology
- 2020
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- This book shares the lessons learned of applying the AIMday methodology at seven Latin American universities. The authors are experts in university industry-cooperation working in their universities’ innovation and technology transfer offices. During 2018/19, they hosted a pilot AIMday and evaluated the process. In this publication, the organizers share their experience and provide some in-depth quantitative, qualitative and comparative analysis of AIMday in different contexts.
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