Through cyclic regeneration, feather stem cells are molded into different shapes under different physiological states. With its distinct morphology, context-dependent growth, and experimental manipulability, the feather provides a rich model to study growth control, regeneration, and morphogenesis in vivo. Recent examples include novel insights revealed by transient perturbation with chemotherapeutic reagents and irradiation during feather growth.
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http://dx.doi.org/10.1038/jid.2015.2 | DOI Listing |
J Dent Sci
January 2025
Department of Dentistry, Wan-Fang Hospital, Taipei Medical University, Taipei, Taiwan.
Background/purpose: The impact of thermal behavior on the clinical performance of gutta-percha points (GP) is unclear. This study aimed to investigate the thermal behavior of three different types of GP and their temperature changes (TC) in a simulated clinical environment.
Materials And Methods: The GP tested were Conform Fit® Gutta-Percha Points (CF), Autofit™ Feathered Tip Gutta Percha (AF), and Gutta Percha Root Canal Points (GC).
J Hazard Mater
January 2025
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Elevated methylmercury (MeHg) exposure poses significant risks to bird health, behavior, and reproduction. Still, the risk of MeHg exposure to forest birds, accounting for over 80 % of the world's bird species, is poorly understood. This study combines Hg isotopes and video analysis, aiming to assess MeHg exposure risks to a forest riverine songbird, the spotted forktail (Enicurus maculatus) from a remote subtropical montane forest.
View Article and Find Full Text PDFJ Anim Ecol
January 2025
Environmental Defense Fund, Seattle, Washington, USA.
For similar species to co-occur in places where resources are limited, they need to adopt strategies that partition resources to reduce competition. Our understanding of the mechanisms behind resource partitioning among sympatric marine predators is evolving, but we lack a clear understanding of how environmental change is impacting these dynamics. We investigated spatial and trophic resource partitioning among three sympatric seabirds with contrasting biological characteristics: greater crested terns Thalasseus bergii (efficient flyer, limited diver, and preference for high quality forage fish), little penguins Eudyptula minor (flightless, efficient diver, and preference for high quality forage fish) and silver gulls Chroicocephalus novaehollandiae (efficient flyer, limited diver and generalist diet).
View Article and Find Full Text PDFPathogens
January 2025
Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki 889-2192, Japan.
Viruses in the family can infect mammals and birds. Porcine circovirus type 2 (PCV2) significantly affects the livestock industry by causing porcine circovirus-associated diseases, such as postweaning multisystem wasting syndrome, respiratory disease complex, and dermatitis nephropathy syndrome. Additionally, beak and feather disease virus in parrots, canine circovirus in dogs, and columbid circovirus (pigeon circovirus) in racing pigeons induce immunosuppression, followed by secondary infections in these hosts.
View Article and Find Full Text PDFInsects
January 2025
Centre of Expertise Sustainable Biomass and Chemistry, Campus Geel, Thomas More University of Applied Sciences, Kleinhoefstraat 4, 2440 Geel, Belgium.
This study explores the optimisation of rearing substrates for black soldier fly larvae (BSFL). First, the ideal dry matter content of substrates was determined, comparing the standard 30% dry matter (DM) with substrates hydrated to their maximum water holding capacity (WHC). Substrates at maximal WHC yielded significantly higher larval survival rates ( = 0.
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