The effect of the chromatic aberration (C(c)) coefficient in a spherical aberration (C(s))- corrected electromagnetic lens on high-resolution high-angle annular dark field (HAADF) scanning transmission electron microscope (STEM) images is explored in detail. A new method for precise determination of the C(c) coefficient is demonstrated, requiring measurement of an atomic-resolution one-frame through-focal HAADF STEM image. This method is robust with respect to instrumental drift, sample thickness, all lens parameters except C(c), and experimental noise. It is also demonstrated that semi-quantitative structural analysis on the nanometer scale can be achieved by comparing experimental C(s)- corrected HAADF STEM images with their corresponding simulated images when the effects of the C(c) coefficient and spatial incoherence are included.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ultramic.2009.09.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Single-cell multi-omics deciphers hepatocyte dedifferentiation and illuminates maintenance strategies.
Cell Prolif
January 2025
MOE Key Laboratory of Bioinformatics, Beijing National Research Center for Information Science and Technology, Bioinformatics Division, Tsinghua University, Beijing, China.
Due to the similarity to human hepatocytes, porcine hepatocytes play an important role in hepatic research and drug evaluation. However, once hepatocytes were cultured in vitro, it was often prone to dedifferentiate, resulting in the loss of their characteristic features and normal functions, which impede their application in liver transplantation and hepatotoxic drugs evaluation. Up to now, this process has yet to be thoroughly investigated from the single-cell resolution and multi-omics perspective.
View Article and Find Full Text PDFThe complete mitochondrial genome of Gyrodactylus pseudorasborae (Platyhelminthes: Monogenea) with a phylogeny of Gyrodactylidae parasites.
BMC Genomics
January 2025
College of Basic Medicine, Guilin Medical University, Guilin, 541199, P.R. China.
Background: Gyrodactylus von Nordmann, 1832, a genus of viviparous parasites within the family Gyrodactylidae, contains one of the largest nominal species in the world. Gyrodactylus pseudorasborae Ondračková, Seifertová & Tkachenko, 2023 widely distributed in Europe and China, although its mitochondrial genome remains unclear. This study aims to sequence the mitogenome of G.
View Article and Find Full Text PDFEffectiveness and safety of hypofractionated gamma knife radiosurgery for large meningiomas and those adjacent to the optic pathway and brainstem: preliminary therapeutic outcomes.
Neurosurg Rev
January 2025
Department of Neurosurgery, The University of Tokyo Hospital, Tokyo, 113-8655, Japan.
Recent technologic advancements have facilitated the use of hypofractionated Gamma Knife-based radiosurgery (HF-GKRS) to treat large lesions or those in eloquent areas. This study aimed to analyze the preliminary results of HF-GKRS for these meningiomas, and to determine its effectiveness and safety. This single-center retrospective study analyzed data of patients who underwent HF-GKRS for large meningiomas or those in eloquent areas with > 6 months of follow-up.
View Article and Find Full Text PDFEpigenetic regulation of macrophage function in kidney disease: New perspective on the interaction between epigenetics and immune modulation.
Biomed Pharmacother
January 2025
Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou 646000, China; Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China; Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China. Electronic address:
The interaction between renal intrinsic cells and macrophages plays a crucial role in the onset and progression of kidney diseases. In recent years, epigenetic mechanisms such as DNA methylation, histone modification, and non-coding RNA regulation have become essential windows for understanding these processes. This review focuses on how renal intrinsic cells (including tubular epithelial cells, podocytes, and endothelial cells), renal cancer cells, and mesenchymal stem cells influence the function and polarization status of macrophages through their own epigenetic alterations, and how the epigenetic regulation of macrophages themselves responds to kidney damage, thus participating in renal inflammation, fibrosis, and repair.
View Article and Find Full Text PDFSpaceflight alters protein levels and gene expression associated with stress response and metabolic characteristics in human cardiac spheroids.
Biomaterials
January 2025
Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA. Electronic address:
Cardiomyocytes derived from human induced pluripotent stem cells (hiPSC-CMs) possess tremendous advantage for cardiac regeneration. However, cell survival is challenging upon cell transplantation. Since microgravity can profoundly affect cellular properties, we investigated the effect of spaceflight on hiPSC-CMs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!