Match!
Peter Sjövall
Research Institutes of Sweden
121Publications
27H-index
2,491Citations
Publications 121
Newest
ABSTRACT Exceptionally preserved Mesozoic feathered dinosaur fossils (including birds) are famous, but recognized from only very few localities worldwide, and are especially rare in the Southern Hemisphere. Here we report an assemblage of non-avian and avian dinosaur feathers from an Early Cretaceous polar (around 70°S) environment in what is now southeastern Australia. The recovered remains incorporate small (10–30 mm long) basal paravian-like tufted body feathers, open-vaned contour feathers, ...
Source
#1Xiaohu Lu (Nynas)H-Index: 6
#2Peter Sjövall (Research Institutes of Sweden)H-Index: 27
Last.Martin Andersson (Research Institutes of Sweden)H-Index: 1
view all 5 authors...
Microstructures of bitumen surfaces (both air-cooled and fractured) were imaged by atomic force microscopy (AFM) and chemically characterised by time-of-flight secondary ion mass spectrometry (TOF-...
Source
#1Johan Lindgren (Lund University)H-Index: 22
#2Dan-Eric Nilsson (Lund University)H-Index: 17
Last.Per Ahlberg (Lund University)H-Index: 25
view all 17 authors...
Fossilized eyes permit inferences of the visual capacity of extinct arthropods1–3. However, structural and/or chemical modifications as a result of taphonomic and diagenetic processes can alter the original features, thereby necessitating comparisons with modern species. Here we report the detailed molecular composition and microanatomy of the eyes of 54-million-year-old crane-flies, which together provide a proxy for the interpretation of optical systems in some other ancient arthropods. These ...
1 CitationsSource
#1Katariina ÖörniH-Index: 25
#2Satu LehtiH-Index: 8
Last.Petri T. KovanenH-Index: 67
view all 4 authors...
4 CitationsSource
#1Peter Sjövall (Research Institutes of Sweden)H-Index: 27
#2Lisa Skedung (Research Institutes of Sweden)H-Index: 7
Last.Gustavo Luengo (""L'Oréal"": L'Oréal)H-Index: 18
view all 6 authors...
The barrier functions of skin against water loss, microbial invasion and penetration of xenobiotics rely, in part, on the spatial distribution of the biomolecular constituents in the skin structure, particularly its horny layer (stratum corneum). However, all skin layers are important to describe normal and dysfunctional skin conditions, and to develop adapted therapies or skin care products. In this work, time-of-flight secondary ion mass spectrometry (ToF-SIMS) combined with scanning electron ...
5 CitationsSource
#1Johan Lindgren (Lund University)H-Index: 22
#2Peter Sjövall (Research Institutes of Sweden)H-Index: 27
Last.Mary H. Schweitzer (NCSU: North Carolina State University)H-Index: 25
view all 23 authors...
Ichthyosaurs are extinct marine reptiles that display a notable external similarity to modern toothed whales. Here we show that this resemblance is more than skin deep. We apply a multidisciplinary experimental approach to characterize the cellular and molecular composition of integumental tissues in an exceptionally preserved specimen of the Early Jurassic ichthyosaur Stenopterygius. Our analyses recovered still-flexible remnants of the original scaleless skin, which comprises morphologically d...
12 CitationsSource
#1Mary H. Schweitzer (NCSU: North Carolina State University)H-Index: 25
#2Wenxia Zheng (NCSU: North Carolina State University)H-Index: 11
Last.Johan Lindgren (Lund University)H-Index: 22
view all 5 authors...
Multiple fossil discoveries and taphonomic experiments have established the durability of keratin. The utility and specificity of antibodies to identify keratin peptides has also been established, both in extant feathers under varying treatment conditions, and in feathers from extinct organisms. Here, we show localization of feather-keratin antibodies to control and heat-treated feathers, testifying to the repeatability of initial data supporting the preservation potential of keratin. We then sh...
2 CitationsSource
#1Hudson P. Pace (Chalmers University of Technology)H-Index: 5
#2Jonas K. Hannestad (Chalmers University of Technology)H-Index: 6
Last.Fredrik Höök (Chalmers University of Technology)H-Index: 47
view all 10 authors...
Over the last two decades, supported lipid bilayers (SLBs) have been extensively used as model systems to study cell membrane structure and function. While SLBs have been traditionally produced from simple lipid mixtures, there has been a recent surge in compositional complexity to better mimic cellular membranes and thereby bridge the gap between classic biophysical approaches and cell experiments. To this end, native cellular membrane derived SLBs (nSLBs) have emerged as a new category of SLBs...
2 CitationsSource
#1Xiaohu Lu (Nynas)H-Index: 6
#2Peter Sjövall (Research Institutes of Sweden)H-Index: 27
Last.Martin Andersson (Research Institutes of Sweden)H-Index: 1
view all 4 authors...
Abstract The aim of this study is to characterize structures induced on bitumen surfaces under analysis by environmental scanning electron microscopy (ESEM), and to examine possible contributing factors to the formation of their formation. Various bitumen samples are investigated, including soft and hard, as well as polymer modified bitumen. Chemical characterization is carried out by time-of-flight secondary ion mass spectrometry (TOF-SIMS), combined with principle component analysis (PCA). The...
5 CitationsSource
#1Xiaohu Lu (Nynas)H-Index: 6
#2Peter SjövallH-Index: 27
Last.Martin AnderssonH-Index: 1
view all 5 authors...
Microstructures of bitumen were investigated using atomic force microscopy (AFM) and environmental scanning electron microscopy (ESEM), and a chemical characterization was successfully carried out using time-of-flight secondary ion mass spectrometry (TOF-SIMS). The bee structures were observed by AFM, for which a chemical explanation by wax was confirmed by the TOF-SIMS analysis. A tube pattern or worm structures were generated and visualized by ESEM on bitumen surfaces. Chemical differences bet...
Source
12345678910