Results 1 to 10 of about 514,785 (377)

Estimation of high-order aberrations and anisotropic magnification from cryo-EM data sets in RELION-3.1

open access: yesIUCrJ, 2020
Methods are presented that detect three types of aberrations in single-particle cryo-EM data sets: symmetrical and antisymmetrical optical aberrations and magnification anisotropy. Because these methods only depend on the availability of a preliminary 3D
Jasenko Zivanov   +2 more
doaj   +2 more sources

It is a sufficient condition only, not a necessary and sufficient condition, for decomposing wavefront aberrations

open access: yesJournal of the European Optical Society-Rapid Publications, 2022
The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form, W ( h 0 , ρ , ϕ ) = ∑ j = 0 ∝ ∑ p = 0 ∝ ∑ m = 0 ∝ C 2 j + m 2 p + m m ( h 0 ...
Lin Psang
doaj   +1 more source

High order aberration and straylight evaluation after cataract surgery with implantation of an aspheric, aberration correcting monofocal intraocular lens [PDF]

open access: yesInternational Journal of Ophthalmology, 2015
AIM:To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting, monofocal intraocular lens (IOL).METHODS:Twenty-one patients (34 eyes) aged 50 to 83y underwent
Florian T A Kretz   +3 more
doaj   +1 more source

Active Aberration Correction with Adaptive Coefficient SPGD Algorithm for Laser Scanning Confocal Microscope

open access: yesSensors, 2022
A laser scanning confocal microscope (LSCM) is an effective scientific instrument for studying sub-micron structures, and it has been widely used in the field of biological detection. However, the illumination depth of LSCMs is limited due to the optical
Kunhua Zhou   +5 more
doaj   +1 more source

Characteristics and survival of patients with advanced cancer and p53 mutations. [PDF]

open access: yes, 2014
P53 mutations are associated with invasive tumors in mouse models. We assessed the p53mutations and survival in patients with advanced cancer treated in the Phase I Program. Of 691 tested patients, 273 (39.5%) had p53 mutations.
Aldape, Kenneth   +12 more
core   +7 more sources

Self calibration of sensorless adaptive optical microscopes [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2011
We present a self-calibrating scheme for microscopes using model-based wavefront sensorless adaptive optics. Unlike previous methods, this scheme permits the calibration of system aberration modes without the need for a separate wavefront sensor or ...
Thayil Anisha, Booth Martin J.
doaj   +1 more source

Implantation of a Small Aperture Intraocular Lens in Eyes with Irregular Corneas and Higher Order Aberrations

open access: yesJournal of Ophthalmic & Vision Research, 2022
Purpose: Corneal irregularities can lead to high order aberrations (HOAs) and may influence the outcomes in terms of intraocular lens (IOL) selection and visual acuity assessment.
Fabrizio Franco   +8 more
doaj   +1 more source

The effects of implantable collamer lens implantation on higher order aberrations [PDF]

open access: yesInternational Journal of Ophthalmology, 2019
AIM: To evaluate the changes in higher order aberrations (HOAs) after implantable collamer lens (ICL; Staar Surgical, Nidau, Switzerland) implantation. METHODS: Totally 30 eyes of 18 patients with myopia were included in this study with an average age ...
Belma Kayhan   +3 more
doaj   +1 more source

The Effect of a Parabolic Apodizer on Improving the Imaging of Optical Systems with Coma and Astigmatism Aberrations

open access: yesPhotonics, 2023
We present the results of improving resolution in the imaging of two closely spaced point sources with an optical system under the influence of apodization and different types of aberrations. In particular, we consider the effect of coma and astigmatism,
Andra Naresh Kumar Reddy   +3 more
doaj   +1 more source

Cyto–Genotoxic Effect Causing Potential of Polystyrene Micro-Plastics in Terrestrial Plants

open access: yesNanomaterials, 2022
The polystyrene micro-plastics (Ps-MPs) is one of the leading pollutants found in both aquatic and terrestrial ecosystems. While most of the studies on the morphology and cyto-toxicity of MPs have been based on aquatic organisms, their effects on ...
Mandeep Kaur, Ming Xu, Lin Wang
doaj   +1 more source

Home - About - Disclaimer - Privacy