Bausch and Lomb

The solvent acetonitrile, the supporting electrolyte, TBAHP, and the reactant thianthrene were purified by well-known procedures described in detail elsewhere /8/. The reactant t-stilbene (Fluka Gmbh) was recrystallised twice from a methanol water mixture. The optical arrangement consisted of focusing lenses, a high efficiency Bausch and Lomb monochromator and a polarising filter. The electrochemical cell was mounted on an X, Y, Z manipulator with calibrated rotation facilities (Fritz-Haber-Institut). The detection... 

Arthur Harms Bausch and Lomb, Rochester, New York... 

In all these tests, the men were asked to read Snellen chart numbers as soon as possible after opening their eyes. In the chamber test with CS aerosols, an Orthorater (Bausch and Lomb vision tester) was used to measure near and far visual acuity. All the treated eyes were then examined by ultraviolet and slitlamp procedures to detect corneal injury. The results of all three experiments may be summarized as follows There were fairly wide variations in the times... 

Figure 3-1 Scale of a Bausch and Lomb Spectronic 20 spectrophotometer. Percent transmittance is a linear scale and absorbance is a logarithmic scale. 

The films contained between 0.1 and 1% residual monomer according to gas chromatographic analysis. The transmittance and fluorescence spectra were measured with a Spectronic 505 spectrophotometer by Bausch and Lomb. To obtain correct fluorescence spectra with respect to energy, the above mentioned apparatus was calibrated using a wolfram-band lamp and an aperture driven by a wavelength-dependent correction... 

The DCP used was a variable speed unit developed in our own laboratory (3-6). (A commercial version of this instrument is mow available as the Brookhaven DCP-1000 Particle Size Analyzer from Brookhaven Instruments Corporation, Ronkonkoma New York. SFFF measurements were performed using a prototype instrument provided by DuPont (.] ) (A commercial version of this instrument is now available as the DuPont SFFF-1000 Particle Size Analyzer.) HDC measurements were made by Micromeritics on their Model HDC-5600 Flowsizer instrument. QELS measurements were made on an instrument constructed by Professor Alex Jamieson at Case Western Reserve University (8). TEM measurements were made by the Pigments Division of SCM Corporation, Adrian Joyce Plant, Baltimore, Maryland. Turbidity measurements were made using a Bausch and Lomb Model Spectronic-20 spectrometer. 

A Bausch and Lomb Spectronic-20 spectrophotometer (and occasionally, a Hewlett-Packard 8450 A) was employed for the turbidity measurements (cell length 1.165 cm, bandwidth of 20 nm, wavelength from 380 to 580 nm). For the turbidity-measurements, the samples were diluted with water saturated with emulsifier. The same degree of dilution was used for all the samples of the batch runs. A large number of measurements were repeated to check for reproducibility. 

Although its softness was a real benefit, HEMA still did not allow significantly more oxygen to penetrate through to the cornea. Nevertheless the lenses, marketed by Bausch and Lomb under the brand... 

The solvents used in the photolyses were purified by distillation and filtered through silica gel columns until they were completely transparent over the range of wavelengths passed by the filter system. A Perkin Elmer model 800 gas chromatograph with flame ionization detectors and 1/8-inch X 5-foot columns, 5% w/w silicone SE30 on chromosorb G, was used to analyze the photolysis products. Ultraviolet spectra were run on a Bausch and Lomb Spectronic 505 double-beam spectrophotometer. 

Celapino and Marshall s results Bausch and Lomb s equipment... 

Photolysis studies were performed using a PEK-110 100-watt high pressure mercury arc lamp. The 3660-A. line was selected by means of a Bausch and Lomb second-order interference filter. 

The transmittance of the solution was then measured at 570 nm on a Spectronic 20 spectrophotometer (Bausch and Lomb) a solution submitted to the treatment just described but to which no silk was added was used as a blank. Two samples of each filtered solution were measured, and the averages of two readings were reported. 

This procedure was applied also to BP, UBP, and GP samples that had been thermally aged at 90 °C and 50 rh for 20 days prior to extraction. The transmit-tances of 5 solutions of the neutral extracts at 460 nm, obtained with a Bausch and Lomb Spectronic 20 spectrophotometer, are noted in Table II. Whatman No. 42 filter paper was used as the substrate for the extracted material. When the sheets were dipped in the 60-mL concentrate, the pickup was found to be about 15. ... 

The success of intravitreal implants, such as achieved with ganciclovir, has renewed interest in developing an intravitreal corticosteroid implant to further enhance the intravitreal route of administration, thus reducing the need for multiple injections. Bausch and Lomb and Control Delivery Systems have developed an intravitreal implant that can deliver the corticosteroid fluocinolone acetonide (Retrisert) to posterior eye tissue for up to 3 years. The implant, which was approved in 2005 by the U.S. Food and DrugAdministration (FDA), delivers 0.59 or 2.1 mg of fluocinolone acetonide. The long-term ocular side effects of this device are unknown at this time. 

Commercial products containing these ingredients are available from a variety of sources. Selected commercial brands are listed below. B L Ocuvite PreserVision (tablet) (Bausch and Lomb, Rochester, NY www.bausch.com)... 

Le Mont Scientific B-10 system features an energy-dispersive x-ray detector. Particles are loaded and interrogated to find size and shape various software options are available. The Bausch and Lomb system has also been applied to electron beam microscopy [l87,l88].rracor Northern describe an integrated system for the collection and processing of analytical and image data from SEM and STEM [l89,l90].Various sample preparation methods have been described. 

Figure 9-21. Diagram of a light beam moving through the optical systems of an Abbe-3L Refractometer. The sample is placed between the illuminating (A) and refracting (B) prisms. (Courtesy of Bausch and Lomb Co., Rochester, N.Y.)...

Elmer Photoelectric Polarimeter, Model 141. Optical rotatory dispersion measurements were made either with the Perkin-Elmer instrument equipped with a Bausch and Lomb High Intensity Grating Monochromator, or with a manual spectropolarimeter constructed by Kirschner and co-workers (1) at Wayne State University. This instrument has been modified by replacing the calcite polarizing and analyzing prisms with quartz prisms and changing light source to a 500-watt Hanovia Xenon Arc Lamp. 

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