(1) These particles of less than 2.5 micrometres in diameter can penetrate the lungs and pass into the bloodstream and have been linked to increased rates of chronic bronchitis, lung cancer and heart disease.
(2) The volume of cytoplasm occupied by electron-dense cored vesicles was significantly increased, whilst their density per square micrometre of cytoplasm was decreased during hypoxia.
(3) With regard to the disappearance of osteocytes in the bone cortex at the cut surfaces of bones, micrometric findings revealed that there was a great difference between the scalded and the unscalded side in every group except in the group where a Gigli's saw was used.
(4) In addition to visual examination and photographic evaluation of restorations, the micrometric assessment of replica photographs from the scanning electron microscope may render clinical trials of amalgam alloys measurable and less subjective.
(5) Our studies reveal the presence of an intact mesothelial lining of the arachnoid mater, including its villus-like projections and herniations into the dural sinus and its lacunae, adjacent cells being joined by tight junctions; in addition we have observed for the first time that many lining cells in the region of the superior sagittal sinus are characterized by unit membrane-bound, electron-optically empty giant vacuoles of several micrometres diameter.
(6) The layer thickness can be controlled and may range between some hundred nanometres and up to a few micrometres.
(7) changed morphology from rods of about 6 to 8 microns long to multicellular filaments (unsheathed trichomes) up to many hundreds of micrometres long with the addition of glycine or certain D-amino acids to the growth medium.
(8) In this context, microscopic and spectroscopic techniques, devised for problem solving, are being applied to frequently encountered sub-micrometre particulates which are 'unstable' with respect to methods of sample preparation and storage used routinely for particulates prior to analysis.
(9) Fifteen micrometres radiolabelled dextran spheres were injected into three adult monkeys; after measuring reference flows, the animals were killed and biopsies were taken from skin and 15 oral mucosal regions.
(10) (1) Formation of extensive contact zones (with a linear size of several micrometres) with tight intermembrane adhesion (more than 30% of the membrane contours in adhesive zones were separated by an apparent distance lower than 500 A) was essentially completed within less than one minute.
(11) In the past, researchers quantified spine density as the number of visible spines per estimated micrometre of dendrite.
(12) Morphological changes in the epidermis caused by aging and sun exposure were studied by light microscopy and micrometric techniques.
(13) On cooling the dispersion from the isotropic phase, we have observed the formation of long (of the order of hundreds of micrometres), thin (0.2-2 microns) filaments, which fluctuate strongly.
(14) The number of cell nuclei and the thickness of the media and intima were determined micrometrically along 8 radii of each cross-section.
(15) The device measures the threshold pressure required to produce bubbles from the micropipette submerged in a liquid and displays the tip inner diameter in micrometres.
(16) The incidence of occult nodal metastases was highest in patients with deeply invasive and micrometrically thick primary tumors.
(17) Methods were tested in four subjects using a micrometric procedure of Doppler probe displacement providing instantaneous real time velocity profiles.
(18) Perijunctional membrane had a Na+ current density 5- to 10-fold greater than the density several hundred micrometres from the end-plate.
(19) The scale of organization is a critical factor in the characterization of biosilicification processes, and order at the nanometre, micrometre and macroscopic levels is described.
(20) The authors report the case of a patient suffering from collagen colitis in whom the administration of omeprazole achieved the rapid and total abolition of the clinical signs and a significant reduction of the collagen band (measurements determined over 10 cryptic spaces using a graduated micrometric ocular microscope).
Micron
Definition:
(n.) A measure of length; the thousandth part of one millimeter; the millionth part of a meter.
Example Sentences:
(1) Oxyhaemoglobin (4 microns at 0.35 ml.min-1) infused into the tracheal circulation almost abolished the responses to bradykinin and methacholine.
(2) Their contour lengths varied from 0.28 to 51 micron, but unlike in the case of maize, a large difference was not observed in the distribution of molecular classes greater than 1.0 micron between N and S cytoplasms of sugar beet.
(3) Blood flow was measured in leg and torso skin of conscious or anesthetized sheep by using 15-micron radioactive microspheres (Qm) and the 133Xe washout method (QXe).
(4) Within the capillary-perfused mucosa and muscularis (between 50 and 2000 microns from the urothelial surface), concentrations decreased by 50% for each 500-microns distance.
(5) The enzyme was quantitated by incubation of 16-micron-thick brain sections with 0.07-2 nM of the converting enzyme inhibitor 125I-351A and comparison to 125I-standards.
(6) The flow properties of white cells were tested after myocardial infarction, by measuring the filtration rates of cell suspensions through 8 microns pore filters.
(7) Axons emerge from proximal dendrites within 50 microns of the soma, and more rarely from the soma, in a tapering initial segment, commonly interrupted by one or two large swellings.
(8) We have investigated some of the factors which affect the retention times of these substances in reversed-phase HPLC on columns of 5-micron octadecylsilyl silica.
(9) The sticking probability decreased as the cell receptor concentration was lowered from approximately 10(4) to 10(2) receptors per 4-microns diam liposome and as the shear rate increased from 5 to 22 s-1.
(10) Thin layers of carbon (20 microns) and vacuoles (30 microns) suggested a large temperature gradient along the tissue ablation front.
(11) Of 533 myelinated sensory fibers, the size range was 2 micron.
(12) These extracts were used to purify transcriptionally active 2-microns minichromosomes in a sucrose gradient.
(13) The overall effect achieved with LTS was less than that with LTP, but it is possible to reduce IOP by selecting more reasonable parameters, e.g., a laser setting of 200mW, a 50 microns spot size and a 0.5 to 1-sec duration.
(14) Using sterile conditions, antibodies to G were incubated with a suspension of transformed cells at 4 degrees C, unbound antibodies were then removed, and the cells were incubated with the immunoabsorbent (3 micron magnetic beads; J. Ugelstad et al.
(15) We find that the labelled cell has a myelinated axon, but that the axon loses its myelin within 50 microns of the soma and has not yet been traced further.
(16) As early as E-28 many growth cones have lamellipodia that extend outward from the core region as far as 10 microns.
(17) Generally, more distant neurones (500-1300 microns) were excited for variable periods of time (3-15 min), while neurones in the vicinity of the injection site (0-500 microns) showed, after a brief period of excitation time, a long-lasting (up to 30 min) decrease in excitability or silencing of discharge, probably due to a depolarizing block and disturbances in the ionic composition of the extracellular space.
(18) In four of them an endothrix type of parasitism with arthrospores 4 to 8 microns in diameter was observed.
(19) The most suitable condition for mucosalplasty revealed the size of the diamond particle to be 200 microns, and rotational speed to be between 12,000-20,000 rpm.
(20) Paraffin sections (8 microns) containing the medial habenular nucleus were stained with cresyl violet and both left and right medial habenular nuclei were measured by planimetry.