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A miscible tetrahydrofuran-tris buffer mixture has been used to fabricate polydopamine hollow capsules with a size of 200 nm and with a shell thickness of 40 nm. An unusual non-emulsion soft template mechanism has been disclosed to explain the formation of capsules. The results indicate that the capsule structure is highly dependent on the volume fraction of tetrahydrofuran as well as the solvent, and the shell thickness of capsules can be controlled by adjusting the reaction time and dopamine concentration.
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http://dx.doi.org/10.1039/c4ob02080d | DOI Listing |
Proc Biol Sci
September 2025
Laboratorio de Paleobiología, Centro de Estudios Avanzados en Zonas Áridas, La Serena, Chile.
Biotic interactions-and predation in particular-are thought to follow a latitudinal gradient, increasing towards the tropics; yet empirical evidence remains contradictory and largely based on studies from the Northern Hemisphere. Moreover, the role of environmental variables shaping latitudinal gradients of predation intensity has seldom been tested. Here, we quantify predation by shell-breaking crabs on modern shells of the marine gastropod along a latitudinal gradient (40°-54° S) on the southwestern Atlantic coast.
View Article and Find Full Text PDFEcol Evol
September 2025
Aquatic Systems Biology Unit TUM School of Life Sciences, Technical University of Munich Freising Germany.
Historically, the thick-shelled river mussel ( agg. complex) was considered a single, widespread species across Europe. However, recent phylogenetic taxonomic revisions have delineated 12 species from this complex, including (s.
View Article and Find Full Text PDFPhys Chem Chem Phys
September 2025
Department of Physics, Indian Institute of Technology (ISM) Dhanbad, Jharkhand-826004, India.
Here, Ln-Li co-doped YO@ZnO core-shell heterostructures were synthesized by three different techniques - intermediate layer conversion method, a hydrothermal method, and an interlayer mediated hydrothermal method. The synthesis procedure is optimized based on the thickness and compactness of the developed shell. The growth kinetics and synthesis mechanism of each adopted method have been explained in detail using XRD, FESEM, TEM, SAED, and EDX characterization techniques.
View Article and Find Full Text PDFPoult Sci
August 2025
Department of Animal Biosciences, Ontario Agricultural College, University of Guelph, Guelph, Ontario, N1G2W1 Canada; Campbell Centre for the Study of Animal Welfare, University of Guelph, Guelph, Ontario N1G2W1 Canada. Electronic address:
Laying hens possess a calcium-specific appetite that intensifies towards lights out to meet the high demands for eggshell formation and skeletal maintenance. Pecking blocks (PBs) are edible enrichments that can serve as an additional calcium source. We explored the relationships between PB preference (PBp), PB use, keel fracture status (KS), and eggshell quality.
View Article and Find Full Text PDFMar Pollut Bull
September 2025
Department of Ocean Engineering, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea. Electronic address:
Coastal sediments in semi-enclosed bays are particularly susceptible to contamination due to limited water circulation and ongoing contaminant input. In Masan Bay, a heavily impacted coastal area in Korea, sediment remediation is essential to alleviate the effects of organic enrichment and hypoxia. This study investigated the effectiveness of oyster shell capping as an in-situ remediation technique by assessing its impact on sediment environment, microbial communities, and macrobenthic fauna.
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