Cover Picture: Structural Concrete 1/2026

The chelating ligand of one of the title complexes shown on the cover picture is coordinated by three nitrogen donors (blue) to the central aluminum atom (wine-red). The latter consists of two more substituents, i.e. two phenyl rings. One of these phenyl rings is “blown” away by the wave of light coming from the right of the picture. The homolytic bond rupture event is highlighted and the phenyl ring flying away is shown in red due to its “hot”, i.e. radical nature. Details of the study are reported by Andreas-Neil Unterreiner, Frank Breher et al. in their Research Article (e202402885). The chelating ligand of one of the title complexes shown on the cover picture is coordinated by three nitrogen donors (blue) to the central aluminum atom (wine-red). The latter consists of two more substituents, i.e. two phenyl rings. One of these phenyl rings is “blown” away by the wave of light coming from the right of the picture. The homolytic bond rupture event is highlighted and the phenyl ring flying away is shown in red due to its “hot”, i.e. radical nature. Details of the study are reported by Andreas-Neil Unterreiner, Frank Breher et al. in their Research Article (e202402885). Polyoxometalates

The CH–π interactions between the CH donor groups of Trp81-ζ and Trp81-η with the aromatic π-systems of ligand 3 (stylized in blue and green, respectively) are illustrated in the cover picture. The backdrop shows an NMR chemical shift scale into which the Trp81 CH cross peaks are schematically drawn. In the complexed form, the CH groups are shifted by up to 2.3 ppm as they are shielded by the aromatic ring systems of the ligand. As explained by G. Platzer, M. Mayer et al. in their Research Article on page 14861, these upfield shifts are indicative of favorable CH–π interactions, which are difficult to detect directly in solution by other methods. The CH–π interactions between the CH donor groups of Trp81-ζ and Trp81-η with the aromatic π-systems of ligand 3 (stylized in blue and green, respectively) are illustrated in the cover picture. The backdrop shows an NMR chemical shift scale into which the Trp81 CH cross peaks are schematically drawn. In the complexed form, the CH groups are shifted by up to 2.3 ppm as they are shielded by the aromatic ring systems of the ligand. As explained by G. Platzer, M. Mayer et al. in their Research Article on page 14861, these upfield shifts are indicative of favorable CH–π interactions, which are difficult to detect directly in solution by other methods. Polymerization Luminescent Materials Hydrothermal Polymerization

In article number e202400148, Takatsugu Murata, Isamu Shiina, and co-workers accomplished the total syntheses of eutyscoparol A and violaceoid C via violaceoid A. The synthesis is facilitated by the desymmetrization strategy. The symmetric skeleton of quinol intermediates is shown in the cover picture with a motif of star signs. As a shooting star, the molecule is desymmetrized to key intermediate and it grows up to the eutyscoparol A. In addition, eutyscoparol A is isolated from Eutypella scoparia SCBG-8 that is an endogenous bacterium in Myrtaceae plant. Therefore, Myrtaceae plant is also seen in the cover picture.

The Chemical RecordVolume 17, Issue 10 p. 902-902 Cover PictureFree Access Cover Picture: Physicochemical Nature of Perfluoroalkyl Compounds Induced by Fluorine (The Chemical Record 10/2017) First published: 12 October 2017 https://doi.org/10.1002/tcr.201781001AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Graphical Abstract The cover picture shows that the material properties of a perfluoroalkyl (Rf) compound are generated by spontaneous molecular aggregation in a two-dimensional manner, which is induced by the Rf-specific helical conformation and the dipole-dipole interaction. A single Rf group exhibits totally different material properties. See the Personal Account by T. Hasegawa (DOI: 10.1002/tcr.201700018). Volume17, Issue10October 2017Pages 902-902 RelatedInformation

The cover picture shows the active site and entrance channel of the Q345F variant of the sucrose phosphorylase from Bifidobacterium adolescentis (BaSP, PDB ID: 5C8B). Reshaping enzyme pockets paves the way for new enzyme activities. BaSP is a thoroughly studied enzyme and is frequently applied to glucosylate various acceptors. Unfortunately compounds of interest, for example bioactive plant polyphenols like flavonoids or resveratrol remain poor acceptors, presumably due to their spatial demands and polarity. We have created a new pocket for large aromatic acceptors through a cascade of loop shifts induced by a Gln345Phe exchange. The cover picture illustrates the initial conformational change of the cascade: sterically demanding Phe345 pushes the flexible Tyr344 out of the active site, thereby enabling the glucosylation of resveratrol. (Image created by Julian Görl.) More information can be found in the communication by C. Grimm, J. Seibel and M. Kraus on page 33 in Issue 1, 2016 (DOI: 10.1002/cbic.201500514).

The cover picture shows a schematic representation of how collagen-induced arthritis, a model for rheumatoid arthritis, is induced in mice by immunization with type II collagen. Immunization leads to presentation of glycopeptide antigens by major histocompatibility complex (MHC) molecules to T cells. By using a panel of synthetic glycopeptides, the T cells were found to recognize the galactose moiety attached to hydroxylysine 264 in the type II collagen fragment CII256-270. These results, and knowledge of which amino acids anchor CII256-270 in the cleft of the class II MHC molecule, were used to generate the structural model of the glycopeptide–MHC complex also shown in the cover picture. Further details can be found in the article by Kihlberg and co-workers on p. 1209 ff. (We thank Bjorn Holm and Andreas Larsson for assistance in the preparation of the cover picture.)

Journal of Animal EcologyVolume 92, Issue 5 p. 945-947 COVER PICTURE AND ISSUE INFORMATIONFree Access Cover Picture and Issue Information First published: 03 May 2023 https://doi.org/10.1111/1365-2656.13721AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Graphical Abstract Cover image: The freshwater snail Physella acuta, a species where antibiotic treatment uncovers a larger extent of shell plasticity. Related article: On the use of antibiotics in plasticity research: Gastropod shells unveil a tale of caution. Photo by Robert Aguilar, Smithsonian Environmental Research Center, used under CC BY 2.0. https://creativecommons.org/licenses/by/2.0/ Volume92, Issue5May 2023Pages 945-947 RelatedInformation

The cover picture shows 1,4,7,10‐tetraisoalkyltetracenes in the solid state under UV light irradiation and under natural light. The photophysical properties exhibit crystallochromy ranging from yellow to red and different fluorescence quantum yields depending on the length of the alkyl side chain. The isopropyl derivative achieved the highest quantum yield ever reported among tetracenes. Details are discussed in the article by C. Kitamura et al. on p. 3033 ff. The background of the cover picture is a night view of Himeji Castle, which is well known for its beauty and supposed resemblance to an egret (it was accorded UNESCO World Heritage Site status in 1993). The authors would like to thank Hiroko Kitamura for her help in designing the cover picture.

Journal of Animal EcologyVolume 91, Issue 11 p. 2151-2153 COVER PICTURE AND ISSUE INFORMATIONFree Access Cover Picture and Issue Information First published: 02 November 2022 https://doi.org/10.1111/1365-2656.13529AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Graphical Abstract Cover image: Coral reef biodiversity is best supported through an assortment of microhabitat types, including coral species of differing morphologies, as well as dead coral. Interestingly, the greatest density and diversity of animals on coral reefs is found in coral rubble – broken dead coral fragments that scatter the seafloor. Stella et al. highlight this overlooked biodiversity in coral reefs across a range of microhabitats with links to water quality and reef fish biomass. See Pp. 2203–2219. Photo: Kennedy Wolfe. Volume91, Issue11November 2022Pages 2151-2153 RelatedInformation

Cover Picture: The cover image shows the recommendation of nitrogen circulating based on the development of a catalytic technology to recycle harmful nitrogen oxides (NOx), that should be purified to N2 before releasing to the atmosphere but artificially supplied through high-temperature combustion, as nitrogen compounds like valuable ammonia (NH3), possibly contributing to the sustainability with saving green land and blue sky in future. More details can be found in article number e2024000094 by Tatsuo Kimura (DOl: 10.1002/tcr.202400094.

Journal of Applied EcologyVolume 59, Issue 11 p. 2667-2669 COVER PICTURE AND ISSUE INFORMATIONFree Access Cover Picture and Issue Information First published: 02 November 2022 https://doi.org/10.1111/1365-2664.13925AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Graphical Abstract Cover image: Magpie Geese take flight at McMinns Lagoon near Darwin, Northern Territory, Australia. Magpie Geese (Anseranas semipalmata) are taxonomically distinct waterbirds widely distributed throughout northern Australia and southern New Guinea. In Australia, the species has a high conservation value given its importance as a cultural icon and food resource, particularly for local Traditional Owners. Geese disperse opportunistically across coastal floodplains throughout the year, and commonly utilise mixed natural-agricultural landscapes during the pre-monsoonal seasonal bottleneck of natural resources for geese (pp. 2756–2766). Photo: © Paul Thomsen, WILDFOTO Volume59, Issue11November 2022Pages 2667-2669 RelatedInformation

The Cover Picture: Straight through the tunnel. Instead of taking the long railway track over the mountains the transaminase-train allows to speed up the asymmetric synthesis of a precursor for the pharmaceutical Ramatroban. Thereby a multi-step synthesis route was reduced to a single step which takes 4 hours instead of previously reported 50 hours giving the amine precursor with >99% ee and 96% isolated yield. The front cover picture was designed by Marba Jos dlvarez and Eduardo Busto. More details can be found in the communication on pages 1937–1942 (E. Busto, R. C. Simon, B. Grischek, V. Gotor-Fernández, W. Kroutil, Adv. Synth. Catal.­ 2014, 356, 1937–1942; DOI: 10.1002/adsc.201300993).

Methods in Ecology and EvolutionVolume 10, Issue 11 p. 1829-1831 COVER PICTURE AND ISSUE INFORMATIONFree Access Cover Picture and Issue Information First published: 04 November 2019 https://doi.org/10.1111/2041-210X.13054AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Graphical Abstract This month’s cover image was taken during the 2015 aerial animal survey in the Laikipia-Samburu Ecosystem (Kenya). Traditional aerial animal counts require a human observer to count all the animals from an airplane between two horizontally aligned bars, while the pilot tries to keep flying in a straight line at the same altitude. To verify that the number of giraffe in this group has been counted correctly, the observer also took pictures of large animal groups to double check the number of counted individuals back on the ground. In the related article, Eikelboom et al. used these images to train a Convolutional Neural Network to automatically detect the elephants, giraffes and zebras in the images. Their algorithm counted between 90% and 95% of the number of these species that were counted by the human observers, of which it correctly detected an extra 2.8 to 4.0% of animals that were missed by all human observers. Their results indicate that the accuracy and precision of animal population estimates can be improved when traditional aerial animal counts are replaced by more cost-efficient semi-automatic aerial counts. Furthermore, when the aerial images are taken at a fixed rate, Eikelboom et al. posit that their animal detection algorithm will outperform human observers in the counting of animals. Photo credit: © L.M. Kenana, Kenya Wildlife Service Volume10, Issue11November 2019Pages 1829-1831 RelatedInformation

Journal of Animal EcologyVolume 92, Issue 3 p. 535-537 COVER PICTURE AND ISSUE INFORMATIONFree Access Cover Picture and Issue Information First published: 01 March 2023 https://doi.org/10.1111/1365-2656.13717AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Graphical Abstract Cover image: A male Wilson's Warbler stops over during migration. Across the last six decades, more than 100,000 Wilson's Warblers have been banded throughout North America, and in the spring, their migration is getting earlier (photo credit: Kyle Horton) Volume92, Issue3March 2023Pages 535-537 RelatedInformation

Cover Picture. The primary function of acylpeptide hydrolase is associated with the removal of N-acetylated amino acid residues from proteins and peptides. Considering the protein degradation cycle cross-talk between acylpeptide hydrolase and proteasome, inhibition of the first enzyme resulted in down-regulation of the ubiquitin-proteasome system and induction of cancer cell apoptosis as reported by Maciej Walczak et al. in their full paper at10.1002/cbdv.202001004.