(n.) A comparatively rare element occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is a hard, brittle, grayish white metal, fusible with difficulty. Its chief commercial importance is for its compounds, as potassium chromate, lead chromate, etc., which are brilliantly colored and are used dyeing and calico printing. Called also chrome.
Example Sentences:
(1) Seventy-six patients with established atherosclerotic disease were treated daily with either 250 micrograms of chromium orally as chromium chloride or a placebo for a period of 7 to 16 months (mean, 11.1 months).
(2) Under standardized conditions, the relationship between antigen content and inhibition of chromium release was linear in a semilogarithmic plot, indicating that the antigen content can be determined from testing two dilutions of a given preparation.
(3) The contents of hexavalent chromium, Cr(VI), in grinding dust were undetectable.
(4) The subjects were exposed to manganese, iron , chromium compounds, thermal radiation, high temperature and noise.
(5) The chromium uptake by the cells in Ca-Mg-free phosphate-buffered solution (PBS(-] was higher than that in other culture media.
(6) Following pretreatment with the monoclonal antibodies anti-HNK-1 (anti-Leu-7) or anti-Leu-11b and complement, NK activity against K562 cells was assessed in 4-hr chromium release assays.
(7) Values for hair chromium concentration of nulliparous women and parous women who had just given birth to a child were determined by atomic absorption spectrophotometry.
(8) Recognition, evaluation and control of hazards were carried out in a typical case where chromium was the major pollutant.
(9) Chromium and its compounds have long been generally recognized as having potentially severe occupational health hazards.
(10) Kinetic analysis of residue and outflow curves of gamma-emitting indicators such as chromium-51-EDTA and iodide-131-thalamate from skeletal muscle gives the possibility to determine the extraction fraction and the plasma flow, and from these two values the capillary diffusion capacity can be calculated (Sejrsen 1970, preliminary report).
(11) Direct detection of chromium in milk, using only argon as purge gas, was inferior.
(12) A knee simulator was used to study the wear of carbon fiber reinforced UHMWPE (Poly Two) (Poly Two is a registered trademark of Zimmer, USA) tibial and patellar components against Ti-6A1-4V, titanium nitride (TiN)-coated Ti-6A1-4V, and cobalt-chromium-molybdenum femoral components.
(13) Results of the determinations indicated that protective leather gloves contained considerable content of chromium, and chromium-free machine oils and lubricants were polluted with chromium's minute quantities as the oils and lubrications were being used.
(14) In 139 persons occupationally exposed to compounds of chromium, formaldehyde and p-phenylenediamine lymphocytic transformation test (ltt) was performed to detect a delayed-type hypersensitivity.
(15) A method for preparation of an immune diagnosticum using human erythrocytes of 0 (I) blood group sensitized with hepatitis B surface antigen in the presence of chromium chloride followed by the addition of formalin solution, for detection of antibody to the hepatitis B surface antigen is described.
(16) The effects of low-chromium diets containing chromium in the lowest quartile of normal intake on glucose tolerance and related variables in 11 females and 6 male subjects were evaluated.
(17) At the same time chromium content was determined quantitatively by atomic absorption.
(18) The results of validation tests showed that both Cr(VI) and trivalent chromium, Cr(III), were stable in the collection medium and that samples may be stored for up to 100 days without appreciable loss of Cr(VI).
(19) Base metal alloys, principally made of nickel, chromium, and beryllium have gained widespread usage, especially in the United States, due to their lower cost and higher mechanical properties.
(20) The amounts of polyethylene and methylmethacrylate debris and the histological reactions in the tissues corresponded closely with those reported in earlier studies of total hip prostheses made of stainless steel or cobalt-chromium alloy.
Polychromic
Definition:
(a.) Polychromatic.
(a.) Pertaining to, or designating, any one of several acids (known only in their salts) which contain more than one atom of chromium.
Example Sentences:
(1) These findings are supported by animal experiments in rabbits with the aid of the polychrome sequence marking technique using fluorochromes.
(2) Experiments in sheep, dogs, and rabbits combining intravital staining of blood circulation and polychrome fluorescent labeling of bone remodeling leads to the conclusion that early bone porosis in the vicinity of the implants is the result of internal remodeling of cortical bone and is induced by necrosis rather than by unloading.
(3) The following methods were used: polychrome injection of arteries, veins, lymph capillaries and vessels, macro-microdissection, staining after van Gieson and with hematoxylin-eosin, impregnation with 0,25--1% solution of silver nitrate, dehydration and clearing, calculation of thickness of loops per 1 mm2 and their depth by means of ocular micrometer.
(4) The tannic acid-polychromic stain method (Mason et al., 1985) designed for the identification of the cultured alveolar type II cells has been adapted to cryostat sections of human lungs.
(5) Polychrome sequence marking and histological tests demonstrated that filling up of bony defects started later with turbine-driven drills than with drills of 2,000 r.p.m.
(6) Impressive polychrome wall murals painted on plaster converted Teotihuacan into a painted city.
(7) High-performance liquid chromatographic analysis of degraded stain samples has shown the products of methanolic degradation to be different from those obtained in aqueous polychroming reactions.
(8) Polychrome injection of arteries and veins was made.
(9) Improved polychrome staining of 1-1.5 mum epoxy sections is achieved with sequential applications of a single basic fuchsin-methylene blue mixture at two different pH values.
(10) Useful extensions of CL microscopy to the field of spectral imaging are obtained with the introduction of a slit, a polychromator and an area detector, substituting for the linear imager.
(11) Drăgan's high-speed PBT (polychrome blue tannin) staining method enables cellular elements to be detected in oral smears in one minute at most.
(12) The different classes of immunoglobulins and their kinetics are determined by the use of monospecific antibodies linked to different enzymes which give a polychromic specific staining.
(13) The staining abnormalities of the first degree disorders are characterized by nonreactivity to the Polychrome stain of the Papanicolaou technique as well as to scarlet red stain of the Shorr technique.
(14) The image of the distribution of 81Br- or 19F-, coded in another color scale, can be superimposed, giving a polychromic image of the cell, thus showing the intracellular localization of the compound.
(15) At 60 C polychroming is rapid, the absorption peak reaching 640-620 nm in 3 days.
(16) The TBLN are revealed by means of polychromic injection of Gerota mass into the lung tissue, or directly into the lymph nodes revealed.
(17) The liver tissue specimens were fixed in OsO4, embedded in epoxy resin, cut 4 microns thick and stained with polychrome.
(18) Polychromic injection of arteries, veins and lymphatic bed, staining of preparations after van Gieson, Weigert, with hematoxylin-eosin and morphometry were the methods applied.
(19) We developed a tannic acid and polychrome stain that can visualize these intracellular inclusions in rat alveolar type II cells by light microscopy and that can be used for autoradiography.
(20) These deposits were polychromic, exhibiting blue, green, red, pink, orange, gold, and yellow colors.