(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.
Spectrometer
Definition:
(n.) A spectroscope fitted for measurements of the luminious spectra observed with it.
Example Sentences:
(1) The experimental results for protein preparations of calmodulin in which Ca2+ was isomorphically replaced by Tb3+ were obtained by a spectrometer working at the Institute of Nuclear Physics.
(2) The pyrolytic conversion of N-protected peptide dimethyltrideuteromethyl anilinium salts to their methyl esters in the direct insertion probe of a mass spectrometer was found to be most suitable for the derivatization of such dipeptide mixtures.
(3) Features of this spectrometer which make it more suitable than the previously employed scintillation spectrometers for the observation of granulocyte and other chemiluminescent systems include; (1) the ability to measure CL immediately upon reaction initiation; (2) simplicity of photomultiplier tube exchange; and (3) built-in optical filter holders for spectral analysis.
(4) The persistency of elution over long time after subsequent transfer to fresh water was calculated at 210 nm absorbance with ultra violet spectrometer.
(5) This investigation was designed to determine the accuracy of a clinical system, which included 12 ICU bedside stations monitored by a medical mass spectrometer (Perkin-Elmer RMS III, Pomona, CA).
(6) It uses neutron irradiation and subsequent measurements of helium 3 and helium 4 in a static mass spectrometer.
(7) The aim of this study is to employ an energy dispersive X-ray spectrometer (EDS) in developing a computer software system for the quantitative analysis of elemental concentrations in biological specimens.
(8) The mixture is lyophilized, converted into the penta-trimethylsilyl-methyloxime derivative and subjected to analysis with a combined gas chromatograph - mass spectrometer equipped with a MID-unit (multiple ion detector).
(9) The isotope effects are measured by the remote label method, using an isotope ratio mass spectrometer for analysis.
(10) The conversions to benzodiazepines were confirmed by a comparison of retention times on a gas chromatograph as well as through the use of a GC-mass spectrometer.
(11) However, there is evidence using urinary drop spectrometer data which makes one suspect that megestrol does have a positive effect.
(12) Muscle pO2, pCO2, and pAr were measured using a Teflon membrane catheter-mass spectrometer system.
(13) A small bolus of each of the tracer gases was injected within 1 ms into a constant airflow at the inlet of the model, and the bolus dispersion curve was measured at the outlet by means of a mass spectrometer.
(14) Prior to termination of incubation, cultures were labeled with 1 muCi of [3H]thymidine and, after harvesting, assayed for [3H]thymidine incorporation in DNA by a liquid scintillation spectrometer.
(15) A grand-scale mass spectrometer with high mass resolution and high transmission was employed for the analysis of haemoglobin variant.
(16) The ion content of heart tissue was measured with flame spectrometer after the decomposition of myocardium by Lumatom tissue solubizer.
(17) An atomic emission detector, consisting of a microwave-induced helium plasma and atomic emission spectrometer, has been used for the gas chromatographic analysis of pesticides.
(18) Scanning mass spectrometers suffer from the disadvantage of monitoring only one mass at any particular time in contrast to mass spectrographs which allow the simultaneous detection of an extended mass range.
(19) Oxygenation in the tibialis anterior muscle was measured using a medical mass spectrometer.
(20) The enrichment of labeled phenylalanine was analyzed by using a gas-chromatograph mass spectrometer, following a primed infusion of the isotope for 6 h. The whole-body protein synthesis of laying hens fed diets deficient in amino acids was significantly lower than that of control hens.