A new scheme of super-resolution optical fluctuation imaging (SOFI) is proposed to broaden its application in the high-order case by separating the elimination of shot noise from the computation of cumulant, applying the low-pass denoising (LPD) operator to SOFI. The high-order cumulants are derived from a basic recursion of moments with the suppression of shot noise by the LPD on raw data. SOFI based on LPD (LPD-SOFI) demonstrates a 10.6-fold lateral resolution enhancement with the cumulant order of the 16th and a seven-fold three-dimensional resolution enhancement with the cumulant order of the 10th in experiments performed on a sparse sample of quantum dots.
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http://dx.doi.org/10.1364/OL.43.000707 | DOI Listing |
Sci Adv
January 2025
Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720-3200, USA.
During meiosis, pairing between homologous chromosomes is stabilized by the assembly of the synaptonemal complex (SC). The SC ensures the formation of crossovers between homologous chromosomes and regulates their distribution. However, how the SC regulates crossover formation remains elusive.
View Article and Find Full Text PDFFront Cell Dev Biol
January 2025
Department of Physics, Faculty of Sciences, FAU Erlangen-Nuremberg, Erlangen, Germany.
The glycocalyx is a dense and dynamic layer of glycosylated species that covers every cell in the human body. It plays crucial roles in various cellular processes in health and disease, such as cancer immune evasion, cancer immune therapy, blastocyst implantation, and functional attenuation of membrane protein diffusion. In addition, alterations in glycocalyx structure may play an important role in ocular surface diseases, e.
View Article and Find Full Text PDFMicrosc Res Tech
January 2025
Dipartimento di Fisica, Università di Genova, Genova, Italy.
MINFLUX nanoscopy relies on the localization of single fluorophores with expected ~ 2 nm precision in 3D mapping, roughly one order of magnitude better than standard stimulated emission depletion microscopy or stochastic optical reconstruction microscopy. This "brilliant" technique takes advantage of specialized localization principles and algorithms that require only dim fluorescence signals with a minimum flux of photons; hence the name follows. With this level of performance, MINFLUX imaging and tracking should allow for the routine study of biological processes down to the molecular scale, revealing previously unresolved details in cell structures, such as the organization of calcium channels in muscle cells or the clustering of receptors in synapses.
View Article and Find Full Text PDFMacromol Rapid Commun
January 2025
Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China.
Hexaarylbiimidazole (HABI) molecules have awakened a broad interest in photo-processing, super-resolution imaging, photoinduced self-healing materials, and photomechanical hydrogels due to their excellent photosensitivity and photo-induced cleavage properties. In this work, a novel photoswitchable branched polyurethanes (BPU), which are synthesized by copolymerizing HABI with glycerol, isophorone diisocyanate (IPDI), and polyethylene glycol (PEG), is designed. 7-Diethylamino-4-methylcoumarin (DMCO) is introduced as a radical quencher, which can not only avoid the hydroxyl interfering from conventional radical scavengers during the polymerization process but also promote efficient quenching of TPIR radicals.
View Article and Find Full Text PDFAnal Chim Acta
February 2025
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China. Electronic address:
Exosomes, which are known to transport diverse proteins from parent cells to recipient cells, consequently influence the biological activities of the recipient cells. Among those proteins, the epithelial cell adhesion molecule (EpCAM), plays a crucial role as it is implicated in cell adhesion and signaling processes. As exosomal EpCAM potentially affects the migration of recipient cells, direct visualization with high spatial resolution is essential to better understand this impact and the role of exosomal EpCAM in recipient cells.
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