(n.) A rare mineral of resinous luster and high specific gravity. It is a tantalate of calcium, and occurs in octahedral crystals usually very minute.
(n.) A minute inclosed crystal, often observed when minerals or rocks are examined in thin sections under the microscope.
Example Sentences:
(1) Contrast radiography revealed that 100 microliters of solution injected i.t.
(2) For Rana catesbeiana Vf was 1.43 microliter min-1 or 0.2 microliter min-1 mg choroid plexus-1 and for Rana pipiens Vf was 0.2 microliter min-1 or 0.1 microliter min-1 mg choroid plexus-1.
(3) The method permits analysis of as little as 2 microliter normal rat tissue homogenate representing 0.4 mg liver tissue (approx 40 micrograms total protein).
(4) Foraging honeybees (Apis mellifera) were trained with 2 successively presented targets differing in color or odor, one of which always contained a 5-microliters drop of 50% sucrose solution and the other, a 5-microliters drop of 20% sucrose solution.
(5) The in vitro transcript probes could detect 1 ng of purified virus and as little as 1 microliter of sap extracts prepared from infected oat shoots.
(6) To 10 microliter of serum, 10 microliter of the internal standard solution and 50 microliter of ethanol are added.
(7) Rabbit corneas grown in organ culture (24 well plate) were inoculated topically with 50 microliters (5 x 10(5) pfu) of different ocular adenoviral serotypes (ATCC and clinical isolates).
(8) The minimum pyrogenic dose in both new-born and adult guinea-pigs was 0.25 microliter, but the 0 to 5-day old animals which responded with a fever to this dose were few in number and large in weight; 'small-for age' neonates became hypothermic.
(9) Infusion of the mixed agonist dopamine (0, 2.0, 10.0, 20.0 micrograms in 0.5 microliter vehicle) into the ventrolateral striatum was found to elicit intense oral stereotypy.
(10) For direct measurement of the ESR signal of superoxide anion (O2-) produced in biological samples, O2- generated at a physiological pH was trapped in alkaline media instead of by a rapid freezing method, and then its signal was measured by ESR spectroscopy at 77 K. A reaction mixture for O2- generation, such as xanthine oxidase-xanthine and neutrophils, was incubated at a physiological pH (pH 7.0-7.5) for a suitable reaction period (30s), then an aliquot (300 microliters) was pipetted out and squirted into 600 microliters of 0.5 M NaOH to stabilize O2- (pH-jump).
(11) The purified enzyme worked best at 37 degrees C and pH 8.0 in a reaction mixture (50 microliters) containing 1.0 micrograms lambda DNA, 10mM Tris-HCl, 7 mM 2-mercaptoethanol, 7 mM MgCl2 and 25mM NaCl.
(12) Five microliters of acetic anhydride was added to the serum to convert all 5-ASA to Ac-5-ASA.
(13) During this search we identified a novel germline transcript containing the JH-C microliter sequence in LyD9 and some of its derivative cells.
(14) Alert, adult male rats were given a 5 microliters intracerebroventricular (i.c.v.)
(15) Plasma from both subject groups (10-100 microliters) inhibited platelet and synaptosomal MAO in a dose-dependent manner to approximately the same degree at each time interval.
(16) In a first experiment the neurons of the lateral hypothalamus were destroyed unilaterally by local injection of ibotenic acid (4 micrograms in 0.5 microliter).
(17) Following derivatization with 50 microliters of N-methyl-N-trimethylsilyl trifluoroacetamide-pyridine (1:1) for 20 min at 65 degrees C the samples are analyzed by capillary column gas chromatography-mass spectrometry with selected-ion monitoring.
(18) CSF-LZM measurement was performed by a rapid turbidimetric assay which required 50 microliters CSF only.
(19) Haemolysate 1 microliter ml-1 had no effect on the denuded artery rings under hypoxic conditions.
(20) Six to 9 weeks after proximal nerve section in 10-d-old and adult rats, 0.1 microliter injections of wheat germ agglutinin (WGA)-HRP were made in the distal part of the reinnervated internal intercostal muscle.
Tantalum
Definition:
(n.) A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.
Example Sentences:
(1) Ultra thin, even, and grainless tantalum films have been found effective in eliminating the charging artifacts caused by external fields, and the decoration artifacts caused by crystal growth as seen in gold films.
(2) Lungs with tantalum powder were not measurably influenced by the bronchographic agents.
(3) Tantalum (Ta), niobium (Nb) and commercially pure titanium (c.p.
(4) The qualification of tantalum wire as suture material was tested by means of physical and histological investigations.
(5) The parent nuclide, W-178 (half-life 21.7 d), was produced in the Michigan State University cyclotron by proton bombardment of stacked natural tantalum-foil targets.
(6) Nineteen patients with mainly cervical tracheal stenoses (12 patients) were investigated in order to examine if a functional X-ray-diagnostic procedure (X-ray-cinetracheobronchography--CTBG--of the central airways in several beam-directions during forced breathing, cough and Valsalva-maneuver after contrasting of the trachea and main-bronchi with powdered tantalum) yields an increase of findings in comparison with a static roentgenologic procedure (chest films p. a. and frontal; tomography) and an endoscopic examination.
(7) Airway reactivity as assessed by methacholine challenge did not explain the difference in response to tantalum in the third group.
(8) In two to six weeks old autografts removed one to three hours after particle injection, the reconstituted marginal zones contained practically all of the sequestered tantalum.
(9) Segmental contraction was determined by cineroentgenography of implanted tantalum markers.
(10) In a rare case of simultaneous glottic and supraglottic webbing a tantalum keel, as described by McNaught, and a silcone elastomer keel, as described by Montgomery, were placed simultaneously via laryngofissure.
(11) Electronic scanning-slit fluorography involves replacing paired fore and aft slits for scatter rejection with only one beam-defining tantalum fore aperture.
(12) As a step toward developing the capabilities of this type of x-ray microscopy, a tantalum x-ray laser at 44.83 angstrom wavelength was used together with an x-ray zone plate lens to image both unlabeled and selectively gold-labeled dried rat sperm nuclei.
(13) Changes in secretion were measured in an exposed section of tantalum-coated tracheal epithelium.
(14) Tantalum markers were implanted in the femur, in the tibia, and in the graft for roentgen stereophotogrammetric analysis (RSA) of the sagittal laxity and the migration of the bony ends of the graft.
(15) Dose-response curves to each agonist were generated in random order, and tantalum bronchograms and simultaneous measurements of pulmonary resistance (RL) and dynamic pulmonary compliance (Cdyn) were obtained at the plateau of the response of each dose of agonist after intravenous (iv) infusion.
(16) Late occlusion (within 4 months) was mainly caused by thrombosis at the tantalum ring and improper usage.
(17) Further demonstration of the collateral pathways was done by use of 1 micrometer sized particles of tantalum.
(18) An anterior commissure laryngoplasty with placement of a tantalum splint has been employed to adjust vocal fold tension in nine cases.
(19) Metallic implants (tantalum balls, 0.5 mm in diameter) were inserted in the calvaria during surgery, and the child was examined postoperatively by roentgen stereometry at intervals of about 100 days (total observation time, 309 days).
(20) Small Tantalum markers were inserted into the anteromedial aspect of the proximal tibial metaphysis 1 cm distal to the proximal tibial growth plate in all of the animals, control and experimental, 2 weeks prior to the onset of electrical stimulation.