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Uranyl acetate solution has widely been used as staining reagent for samples processed for ultrastructural morphology, cytochemistry, and immunocytochemistry. Although uranyl acetate guarantees high performance as a staining reagent, the radioactive uranyl salts make its use and purchase severely restricted. In this view, we used a non-radioactive lanthanide mix solution as contrasting dye for both nucleoplasmic and nucleolar ribonucleoprotein-containing components. This method guarantees a good contrast without masking the probe-antigen immunoreaction, thus proving to be a suitable tool for high-resolution studies of both cyto- and immunocytochemistry on acrylic resin-embedded samples.
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http://dx.doi.org/10.1007/978-1-0716-2675-7_18 | DOI Listing |
Methods
August 2025
Graz Centre for Electron Microscopy, Steyrergasse 17, Austria; Institute of Electron Microscopy and Nanoanalysis, NAWI Graz, Graz University of Technology, Steyrergasse 17, Austria.
The use of uranyl acetate, a staining agent successfully used for decades in electron microscopy of biological specimens, is now strictly regulated by law due to its toxicity and radioactivity. It is even banned in some laboratories. In the meantime, there are a number of substitutes on the market, none of which comes close to the very good staining results of uranyl acetate, or only partially, and some of which are also toxic.
View Article and Find Full Text PDFZhonghua Wei Zhong Bing Ji Jiu Yi Xue
June 2025
Department of Rehabilitation Medicine, Center for Rehabilitation Medicine, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Rehabilitation and Sports Medicine Research Institute of Zhejiang Province, Hangzhou 310014, Zhejiang, China.
Objective: To observe the degree of myocardial cell injury and the changes in autophagy level in rats with myocardial ischemia/reperfusion (I/R) injury induced by cardiopulmonary bypass (CPB), and to explore the regulatory role of the long non-coding RNA-urothelial carcinoma antigen 1-microRNA-143-Notch1 axis (lncRNA-UCA1-miR-143-Notch1 axis) in myocardial I/R injury induced by CPB.
Methods: Healthy male Sprague-Dawley (SD) rats were randomly divided into the following groups using the random number method: Sham operation (Sham) group, myocardial I/R injury model group (model group), empty lentivirus group, lncRNA-UCA1 upregulation group, miR-143 downregulation group, and lncRNA-UCA1 upregulation+miR-143 upregulation group, with 9 rats in each group. The rat model of myocardial I/R injury induced by CPB was established by thoracotomy aortic ligation under cardiopulmonary bypass support; in the Sham group, only threading was performed without ligation, and other procedures were the same.
Sci Rep
July 2025
Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, 603203, Tamil Nadu, India.
Bacterial biofilm development plays a crucial role in causing serious health concerns in the medical sector. The adhesion of germs on living and non-living surfaces can lead to damage as well as diseases in humans, and other animals. To address this problem, researchers focus exclusively on bacteriophage therapy.
View Article and Find Full Text PDFSci Rep
July 2025
Department of Herbal and Animal Production, Kırıkkale Vocational School, Kırıkkale University, Kırıkkale, Turkey.
Uranium compounds, particularly uranyl acetate, are known to cause significant genotoxic and oxidative damage in biological systems due to their high chemical reactivity. In recent years, plant-based antioxidants, such as those found in Abelmoschus esculentus (L.) Moench, have attracted considerable attention for their potential to mitigate the toxicity of heavy metals.
View Article and Find Full Text PDFJ Microsc
September 2025
Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany.
In this study, we present a protocol to visualise, track and distinguish between two different binder components commonly used for batteries, styrene butadiene rubber (SBR) and sodium carboxymethyl cellulose (CMC), within a composite hard carbon electrode for sodium-ion batteries using a two-step staining method. The application of osmium tetroxide (OsO) vapour followed by uranyl acetate (UA) solution enables the staining of different functional groups and the individual tracing of SBR and CMC by energy dispersive X-ray spectroscopy (EDX) measurements using the osmium (Os) and uranium (U) content. This staining procedure and the filling of the pore space with conductive platinum carbon (PtC) composite via local electron-beam-induced deposition (EBID) results in an excellent contrast for all components of the electrode material.
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