Results 301 to 310 of about 597,116 (348)
Some of the next articles are maybe not open access.
Medical & Biological Engineering & Computing, 1997
The complex electrical impedance of a goat eye lens is studied in the frequency range 10 mHz-10 Hz at room temperature, using a computer-controlled AC impedance system. AC impedance software (model 368, version 2.2) is employed to determine the total impedance and capacitance of the eye lens at various frequencies.
K S, Kohli +4 more
openaire +2 more sources
The complex electrical impedance of a goat eye lens is studied in the frequency range 10 mHz-10 Hz at room temperature, using a computer-controlled AC impedance system. AC impedance software (model 368, version 2.2) is employed to determine the total impedance and capacitance of the eye lens at various frequencies.
K S, Kohli +4 more
openaire +2 more sources
2015
Both lens and facet eyes were “invented” multiple times throughout animal history. Lens eyes first emerged in the Paleozoic in vertebrates and octopi. However, lens eyes had already existed within cnidarians – mainly within highly poisonous box jellyfish. As fossils, these animals make their earliest appearance in the mid-Cambrian, or about 500 million
Georg Glaeser, Hannes F. Paulus
openaire +1 more source
Both lens and facet eyes were “invented” multiple times throughout animal history. Lens eyes first emerged in the Paleozoic in vertebrates and octopi. However, lens eyes had already existed within cnidarians – mainly within highly poisonous box jellyfish. As fossils, these animals make their earliest appearance in the mid-Cambrian, or about 500 million
Georg Glaeser, Hannes F. Paulus
openaire +1 more source
Glycogen in the Lens of Birds' Eyes
Nature, 1963IT is well known that the dry substance in the lens of vertebrate eyes is composed almost entirely of protein. I reported earlier1 the presence of a considerable quantity of glycogen in the lens of different species of birds. This substance was first detected with periodic acid–Schiff staining of the paper-electropherograms made from lens extract and ...
openaire +2 more sources
Permeability of the eye lens capsule of the bigeye tuna to nuclear eye lens proteins
Comparative Biochemistry and Physiology, 1970Abstract 1. 1. Protein was extracted from lens nuclei of bigeye and skipjack tunas, dolphin fish and one species of squid. 2. 2. Total concentration and electrophoretic characteristics of the protein were determined in extracts which were not enclosed or were partially enclosed in bigeye lens capsule for 24 hr. 3. 3. High molecular weight
openaire +2 more sources
The Intermediate Filament Systems in the Eye Lens
2004Publisher Summary This chapter describes the basic methods to purify important lens fractions and to track the distribution of IF proteins in the eye lens and their associated proteins. It also provides the description of the methods used for the preparation, sectioning, and examination of eye lenses.
Der Perng, Ming +6 more
openaire +4 more sources
Bag-in-the-lens intraocular lens implantation in the pediatric eye
Journal of Cataract and Refractive Surgery, 2007To study the efficacy, safety, and feasibility of implantation of a bag-in-the-lens intraocular lens (IOL) in children and babies.Departments of Ophthalmology, University Hospital, Antwerp, Belgium, and the University Hospital, Ljubljana, Slovenia, and a private ophthalmology practice, Oudenaarde, Belgium.Thirty-four eyes of 22 children had ...
Tassignon, Marie José +5 more
openaire +4 more sources
Tensile strength of lens capsules in eye-bank eyes
Journal of Cataract and Refractive Surgery, 1998To measure the tensile strength of the anterior and posterior lens capsules in eye-bank eyes and study the tensile strength of capsules dehydrated with hypertonic glucose solution.Tongren Hospital, Beijing, China.The in situ anterior and posterior capsules of 35 eye-bank eyes (Group 1) donated by healthy men aged 20 to 40 years (mean 27.1 years) were ...
X, Yang +5 more
openaire +2 more sources
Acta Ophthalmologica, 2011
AbstractPurpose To prevent the induction of cataracts by ionizing radiation (photons or betas), the International Commission on Radiological Protection (ICRP) has lowered the annual dose limit for the eye lens from 150 mSv down to 20 mSv for occupational exposures.
openaire +1 more source
AbstractPurpose To prevent the induction of cataracts by ionizing radiation (photons or betas), the International Commission on Radiological Protection (ICRP) has lowered the annual dose limit for the eye lens from 150 mSv down to 20 mSv for occupational exposures.
openaire +1 more source
The Conformity of a Soft Contact Lens on the Eye
Journal of Biomechanical Engineering, 1996An axisymmetric elastic shell deformation model has been created to predict the conformity of a soft contact lens when pressed against the eye. Regions of contact and gap may be predicted, and the nonuniform reaction pressure between the lens and eye may also be found. This is important for issues like abrasion and comfort.
G M, Funkenbusch, R C, Benson
openaire +2 more sources
Transparency of the lens and the eye
Acta Ophthalmologica, 2016SummaryEye media transparency, and in particular that of the crystalline lens, is a requirement for good vision. Incipient lens opacification reduces retinal illumination and also increases intraocular scattering, producing unwanted visual artifacts, such as glare, that affect retinal image quality.
openaire +1 more source