(n.) An instrument for measuring the depth of the color of anything, especially of a liquid, by comparison with a standard liquid.
Example Sentences:
(1) The colorimeter output is several orders of magnitude above the lower limit of detection of the photon counter.
(2) 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.
(3) The results of the assay can be read either with a simple colorimeter or the naked eye.
(4) A simple vertical-beam colorimeter is described (useful in the Micro-SIA) which can be easily assembled by the user from commonly available components.
(5) The examination of each sample consisted of three parts: (1) apparent specific gravity analysis (porosity); (2) tristimulus colorimeter analysis; and (3) subjective observer color analysis.
(6) Micro colorimeters, equipped with appropriate interference filters and small-volume (2-8 mu 1) flow cells, are used as detectors.
(7) The Minolta tri-stimulus colorimeter CR-200 was used to quantify the blanching effect of topical corticosteroids in a non-occluded vasoconstriction test.
(8) In other rats, total protein concentration of peritubular capillary blood plasma was determined before, during, and after these same infusions with a newly described submicroliter fiber-optic colorimeter.
(9) The irritant skin response was quantified by visual scoring as well as by the following noninvasive methods: measurement of transepidermal water loss (TEWL) by an evaporimeter, measurement of skin color by a colorimeter, measurement of superficial blood flow by laser Doppler flowmetry, and measurement of edema in the skin by ultrasound A-scan.
(10) The following noninvasive measuring methods were used for evaluation of the skin before and after exposure to irritants: measurement of transepidermal water loss by an evaporimeter, measurement of electrical conductance by a hydrometer, measurement of skin blood flow by laser Doppler flowmetry, measurement of skin colour by a colorimeter and measurement of skin thickness by ultrasound A-scan.
(11) We designed and built a simple colorimeter that facilitated rapid direct visual comparison of unknown samples with known color standards.
(12) Using a Wright colorimeter the ordinary long-term, long-wave cone dark-adaptation curve was measured at 0, 2, 4, 7, 17, 25, 40 and 49 degrees nasally in the visual field.
(13) This paper describes a combined unit, consisting of an analog to digital converter and a personal computer, which was connected in parallel with the chart recorder and the analyser's 570 nm channel of the colorimeter.
(14) Divers were required to color match stimuli using either a Burnham-type colorimeter or the Munsell Limit Color Cascade.
(15) A colorimeter-based swim-up (SU) technique was developed and compared with a Hamilton Thorn Motility Analyser (HTM) for the evaluation of ram semen.
(16) Such modifications helped obtain compatible results of optic density measurements and DI values with photoelectric colorimeters of various brands.
(17) The effect of opacity on the colorimetric responses of large-area and small-area colorimeters was determined using an elastomer intended for maxillofacial prosthetics use and containing various pigments at different concentrations.
(18) The colorimeter setting is then matched by a combination of tinted trial lenses.
(19) This double-blind study evaluated the Rembrandt Lightening Gel and Whitening Toothpaste for shade change, colorimeter shade change.
(20) With both colorimeters a positive movement of the alpha-axis (toward red, P less than 0.001) and a negative movement on the L-axis (toward dark, P less than 0.01) were registered.
Spectrophotometer
Definition:
(n.) An instrument for measuring or comparing the intensites of the colors of the spectrum.
Example Sentences:
(1) Masticatory efficiency was measured by means of a spectrophotometer, using adenosine triphosphate (ATP) granules, the biting force and occlusal contact area.
(2) After an appropriate dilution, the released pyridine-2-thione which has a strong absorbance at 343 nm, is quantified by reading its absorbance in a spectrophotometer at 343 nm.
(3) This paper describes the properties and use of a fiber optic probe as an attachment to a spectrophotometer and its use for measurements in solutions and turbid suspensions.
(4) Cadmium and lead were determined in kidney and liver tissues of the sacrificed animals by using a trace metal analyzer and by atomic absorption spectrophotometer.
(5) The concentration-dependent association-dissociation equilibrium of the bifunctional enzyme aspartokinase I-homoserine dehydrogenase I of Escherichia coli K12 has been investigated at pH 7.6 in the presence of 10 mM L-threonine and 0.1 M KCl by equilibrium gel permeation monitored by a single-photon counting spectrophotometer.
(6) Carrier status is determined by scanning the autoradiographs with a densitometric spectrophotometer or by detection of a junction fragment.
(7) The absorbed and in the urine excreted 14C-activities are measured with a scintillation spectrophotometer and scintillator composed of 2,5-diphenyloxazole(POP), 1,4-bis-(4-methyl-5-phenyl-2-oxazolyl)benzene (dimethyl-POPOP), naphthalene, toluene and ethyleneglycol monomethylether.
(8) A spectrophotometer interfaced with a computer is used to plot the standard curve and calculate the protein content of each sample.
(9) The procedure developed enabled to use commonly employed spectrophotometers and to decrease distinctly the glutathione reductase consumption.
(10) Serum Al, Cu, Zn, Ni and Mn were measured with a flameless atomic absorption spectrophotometer.
(11) Capillary mean transit time was determined by detection of the passage of a hemodilution bolus through a region of the parietal cerebral cortical surface, using a reflectance spectrophotometer through a small craniotomy in chloral hydrate-anesthetized rats.
(12) Results obtained correlated well with those produced by our routine instrumentation (Beckman Astra, Varian atomic absorption spectrophotometer).
(13) Time-dependent changes in the ultraviolet absorbance of the adenine chromophore are observed in the stopped-flow spectrophotometer when adenosine and its analogs are rapidly transferred from protium oxide to deuterium oxide.
(14) The 412 nm complex must be present at appreciable concentrations when bacteriorhodopsin is exposed to high-energy argon ion laser light of the Raman spectrophotometer at room temperature.
(15) We have investigated the binding of fluorescein isothiocyanate (FITC)-labeled fibrinogen to platelets using a fluorescence spectrophotometer and a flow cytometer.
(16) The oxidation of reduced human ferroxidase by molecular O2 was studied in a stopped-flow spectrophotometer.
(17) The probe was calibrated for turbidimetric measurements with microorganisms by relating the apparent absorbancy measured on the spectrophotometer to the dry weight of each species of organism.
(18) An automated IR-spectrophotometer-mini-computer system was designed for assay of steroid hormone level.
(19) Then the stained cells were solubilized with 1% lauryl sulfate and the absorbance of each well was measured at 540 nm with a multiscan spectrophotometer.
(20) Difference spectra of the effect of HCo on the inhibition of cytochrome c oxidase by cyanida and azide in isolated intact mitochondria were recorded using a split beam spectrophotometer.