(n.) An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.
Example Sentences:
(1) Broad half-band width (greater than 10 nm) photometers showed little deviation from linearity.
(2) Using the Perkin Elmer flame photometer sodium and potassium concentrations have been measured in muscle fibers from the m. ileofibularis of Rana temporaria.
(3) Using Scheimpflug photography (a modified SL 45 Topcon camera) instead of the transmission measurements of incubated lenses has the advantage that disorders in lens transparency can be exactly localized and the sensitivity is much higher than the photometer readings.
(4) The photometer was of a type commonly used for routine determination of a haemoglobin concentration in blood.
(5) Three simple photometers were tested for their suitability to determine concentrations of creatinine in small animal practice.
(6) An elution electrophoresis system in which a porous packed bed is used for separation and a flow photometer or colorimeter for continuous monitoring of the eluate may be capable of rapid, high-resolution analysis of serum proteins and other protein mixtures with very little manual labor.
(7) The system uses a Leitz MPV II scanning photometer, a PDP-8 computer with 24 k of core memory and a Tektronix 4010 graphic display terminal.
(8) Combination of the photometers with a "cuvette test" produced satisfactory results on comparison with a reliable reference method.
(9) These parameters were analyzed by using a reflection photometer (Reflotron).
(10) From 1968 to 1972 and in 1975 (provisional results) urine samples collected on three days per year were examined by photometer for N-acetyl-p-aminophenol (=NAPAP, main metabolite of phenacetin) and for salicylates in the same population.
(11) The effect of calcium on the biogenic amine level and distribution in the mouse brain was investigated by a histochemical method using a microscopic photometer (Pl, Nikon).
(12) Microphotometric measurements were performed at 565 nm by means of a computer-controlled microscope photometer.
(13) This program was written for a Wang 720 C programmable desk calculator associated to the Zeiss scanning photometer MP01.
(14) The available forms of Na2O and K2O were determined in the soil on a flame photometer.
(15) The assay is set up in microtitre plates, and following an uptake phase and removal of non-ingested erythrocytes, pseudoperoxidase activity is measured in detergent lysates of phagocytes, using an ELISA reader photometer.
(16) Quantitative parameters of the chromatin structure in the same nuclei measured in situ by a scanning microscope-photometer (step size 0.125 micron) before and after staining were equal.
(17) The assay result may also be read in a photometer, if the solution is first transferred to a transparent microtiter well.
(18) We evaluated eight blood glucose monitors (BGMs), from six manufacturers, that are lightweight, portable, battery-powered, relatively inexpensive handheld reflectance photometers that use test strips for self-monitoring of blood glucose levels.
(19) Evaluation was accomplished by comparing statistical morphometric and photometric data taken from digital images of FAMs generated by the microscope photometer.
(20) The amount of horse radish peroxidase labeled protein-A or anti-rat IgG bound to the antigen-antibody complexes is measured on the spectro photometer at wave length of 492 nm.
Photometry
Definition:
(n.) That branch of science which treats of the measurement of the intensity of light.
Example Sentences:
(1) We studied the formation and structure of liquid crystalline phase of F-actin solutions by polarized light photometry, assuming that a small domain of the liquid crystalline phase works as a linear retardation plate.
(2) The nuclear DNA contents of 50 thyroid tumors were measured paraffin block samples and needle biopsies by using microscopic photometry, and the diagnostic value of this measurement was examined.
(3) Renal blood flow was measured by an electromagnetic flowmeter, glomerular filtration rate by creatinine clearance, urinary sodium by flame photometry and solute excretion by osmometry.
(4) Spectral luminous efficiency functions for mesopic vision were measured extensively to establish a basic data set for the mesopic photometry system.
(5) Various functional states of cells of sarcoma 45 in the course of its growth and regression were studied by photometry and spectral analysis using acridine orange.
(6) The effect of polyoxin D on Candida was evaluated in in vitro assays for its capacity to adhere to buccal epithelial cells (BEC), and by fluorescent-microscopy photometry and flow cytometry using cells stained with cellufluor (CF), a fluorochrome with affinity for chitin.
(7) The measurements in whole blood and plasma from intensive care patients were compared with flame photometry.
(8) SP-like immunoreactivity (SPLI) in the dorsal horns was quantitated using immunohistochemical staining and manual photometry.
(9) Concentrations were obtained per kilogram of dry mass, were converted to concentrations per litre of water content using known figures for water and solid concentration of nucleus and cytoplasm, and were then compared with measurements on cells from the same animal obtained by flame photometry.
(10) It is based on the microscopic photometry of stain intensities per area of functional units.
(11) The effect of Na and K ions on active Na transport was studied in guinea-pig auricles by means of flame photometry.
(12) Radiography and flame photometry have been compared as means of determining the end point of decalcification in relation to minimizing pulp-dentin separation in histological sections of teeth.
(13) The process of electrophoresis, a separation phenomenon, is mistakenly understood to include the sequential processes ancillary to analyte resolution, that is, staining and quantification, where the latter could be elution followed by photometry or integrating-calculating-densitometry.
(14) We conclude that the phasic, magnocellular cell system of the primate visual pathway underlies performance in the psychophysical task of heterochromatic flicker photometry.
(15) IV as a group were estimated by photometry of hydrolysed samples, using I as a reference.
(16) The contractile activity of the wall and valve of lymphatic microvessels (LM) of the rat mesentery were studied biomicroscopically by optic photometry.
(17) Intra-erythrocytic sodium was studied using hypotonic lysis and flame photometry after four washings with isotonic MgCl2 in 240 normotensive subjects (aged 10-45 years) on a free diet with (F+, 121 patients) or without (F-, 119 patients) hypertensive parents, recruited from a random sample of the general population.
(18) The precision levels of available alternatives for electrolyte analysis namely: flame photometry, direct and indirect ion selective electrode methods, dry chemistry, and the newly developed enzymatic approach for sodium and potassium analysis are discussed.
(19) The T3 response of other cardiac mRNAs was quantitated using in vitro translation, separation of 35S methionine labeled translational products and their quantitation by digital matrix photometry.
(20) Here we consider cancelling opposed movements for photometry with coloured lights, and some recent experiments, carried out with John Harris, on nulling 'real' against opposed 'apparent' motion for teasing out some neural movement channels.