Results 251 to 260 of about 1,280,003 (288)
Some of the next articles are maybe not open access.
A scanning interference microphotometer
Experimental Cell Research, 1957Abstract An instrument for direct measurement of the optical path difference (o.p.d.) in biologic preparations is described. The instrument includes a Baker Interference Microscope. A small area (0.2 μ 2 ) of the preparation is projected onto a photomultiplier. The analyzer of the microscope is located in front of the photomultiplier. This analyzer
openaire +2 more sources
Journal of Cataract and Refractive Surgery, 2003
To compare 2 A-scan instruments with regard to differences in measured results for the same patient sample.St. Erik's Eye Hospital, Stockholm, Sweden.In a study to evaluate the lens-haptic plane concept of intraocular lens (IOL) power calculation, 148 patients eligible for cataract surgery were measured with 2 different A-scan instruments (BVI Axis and
Sverker, Norrby +3 more
openaire +2 more sources
To compare 2 A-scan instruments with regard to differences in measured results for the same patient sample.St. Erik's Eye Hospital, Stockholm, Sweden.In a study to evaluate the lens-haptic plane concept of intraocular lens (IOL) power calculation, 148 patients eligible for cataract surgery were measured with 2 different A-scan instruments (BVI Axis and
Sverker, Norrby +3 more
openaire +2 more sources
A Scanning Micropipette Molecule Microscope
Science, 1981A movable quartz micropipette, whose tip is sealed with a polymer plug, is used as a liquid-vacuum interface to a mass spectrometer. A light microscope allows observation of, and positioning of, the micropipette tip on the surface of a sample mounted in a perfusion chamber. This forms the basis of an instrument which enables one to study, in vitro, the
J A, Jarrell, J G, King, J W, Mills
openaire +2 more sources
Combination of a scanning tunneling microscope with a scanning electron microscope
Review of Scientific Instruments, 1988We have placed a scanning tunneling microscope (STM) in the sample stage of a scanning electron microscope (SEM). This allows us to focus the tip on a preselected spot for STM operation with a precision of 0.5 μm. We are able to check the state of the sample and the tip during STM operation by simultaneous use of the SEM.
L. Vázquez +4 more
openaire +1 more source
A Scanning Magnetooptical Micromagnetometer
Instruments and Experimental Techniques, 2005A scanning magnetooptical magnetometer designed for measuring weak spatially nonuniform magnetic fields is described. The magnetometer's principle of operation is based on the Faraday effect caused by the magnetic field under study in the region of an epitaxial garnet-type ferrite film whose dimensions are on the order of the period of its domain ...
R. R. Vil'danov, B. Yu. Sokolov
openaire +1 more source
Tympanosclerosis: a scanning electron microscopic study
Clinical Otolaryngology, 1989Twelve specimens of tympanosclerosis were examined. Six were immediately fixed in 3% glutaraldehyde and 6 were obtained from the departmental collection of specimens in wax blocks which had previously been examined by light microscopy. Seven specimens were demineralized.
G J, McKee, A G, Kerr
openaire +2 more sources
Technetium 99m as a Scanning Agent
Radiology, 1965INTEREST has increased over the past few years in the use of technetium 99m as a radioactive tracer material for organ and tumor localization studies (1). Initially, attention was focused on this nuclide because of its favorable physical properties for biological applications (2).
P V, HARPER +4 more
openaire +2 more sources
Osteopetrosis: A scanning electron microscopic study
Human Pathology, 1981Scanning electron microscopic investigation was conducted with bone in a case of osteopetrosis by comparing it with normal cortical bone. The fractured surface of the osteopetrotic bone was devoid of the orderly constructed lamellar haversian system seen in normal bone. It was occupied by a massive smooth cartilaginous matrix containing scattered rough
T T, Kuo, C P, Davis
openaire +2 more sources
Comparison of A-scan device accuracy
Journal of Cataract and Refractive Surgery, 1990A-scan biometry is recognized as a useful aid in predicting intraocular lens power. Measurements are reported to be accurate to better than +/- 0.1 mm. Three biometry devices were compared in examinations of 159 persons, each examination being repeated several times.
U, Giers, C, Epple
openaire +2 more sources
1995
Abstract This paper reports on the design of a small actuator for a linear-scan application. Various different types of model used during design included field and circuit models. Details of the actuator topology and simulation results are given in the paper.
ö. Göl +3 more
openaire +1 more source
Abstract This paper reports on the design of a small actuator for a linear-scan application. Various different types of model used during design included field and circuit models. Details of the actuator topology and simulation results are given in the paper.
ö. Göl +3 more
openaire +1 more source