What's the difference between blood and penumbra?

Blood


Definition:

  • (n.) The fluid which circulates in the principal vascular system of animals, carrying nourishment to all parts of the body, and bringing away waste products to be excreted. See under Arterial.
  • (n.) Relationship by descent from a common ancestor; consanguinity; kinship.
  • (n.) Descent; lineage; especially, honorable birth; the highest royal lineage.
  • (n.) Descent from parents of recognized breed; excellence or purity of breed.
  • (n.) The fleshy nature of man.
  • (n.) The shedding of blood; the taking of life, murder; manslaughter; destruction.
  • (n.) A bloodthirsty or murderous disposition.
  • (n.) Temper of mind; disposition; state of the passions; -- as if the blood were the seat of emotions.
  • (n.) A man of fire or spirit; a fiery spark; a gay, showy man; a rake.
  • (n.) The juice of anything, especially if red.
  • (v. t.) To bleed.
  • (v. t.) To stain, smear or wet, with blood.
  • (v. t.) To give (hounds or soldiers) a first taste or sight of blood, as in hunting or war.
  • (v. t.) To heat the blood of; to exasperate.

Example Sentences:

  • (1) Here we have asked whether protection from blood-borne antigens afforded by the blood-brain barrier is related to the lack of MHC expression.
  • (2) On both days, blood was collected by jugular venepuncture at 10.30 h, and then again 2, 4, 6 and 24 h later.
  • (3) Circuit weight training does not exacerbate resting or exercise blood pressure and may have beneficial effects.
  • (4) There was a weak relation between AER and both systolic and diastolic blood pressures.
  • (5) Fecal occult blood was positive in 4 patients and fecal leukocytes were positive in one patient.
  • (6) Blood samples were analysed by mass spectroscopy and gas chromatography.
  • (7) We conclude that first-transit and blood-pool techniques are equally accurate methods for determining EF when the time-activity method of analysis is employed.
  • (8) At the early phase of the sensitization a T-cell response was seen in vitro, characterized by an increased spleen but no peripheral blood lymphocyte reactivity to T-cell mitogens at the same time as increased reactivity to the sensitizing antigen was detected.
  • (9) With aging, the blood vessel wall becomes hyperreactive--presumably because of an augmented vasoconstrictor and a reduced vasodilator responsiveness.
  • (10) After 3 and 6 months, blood collected by cardiocentesis using ether anesthesia and then sacrificed to remove CNS and internal organs.
  • (11) The transport of potassium ions through membranes of red blood cells was examined in in bitro experiments using a CMF of 4500 oersted.
  • (12) Blood flow decreased immediately after skin expansion in areas over the tissue expander on days 0 and 1 and returned to baseline levels within 24 hours.
  • (13) Under blood preservation conditions the difference of the rates of ATP-production and -consumption is the most important factor for a high ATP-level over long periods.
  • (14) 10D1 mAb induced a substantial proliferation of peripheral blood T cells when cross-linked with goat anti-mouse Ig antibody.
  • (15) In addition to the changes associated with blood group A, we also found a decrease in sugar content, alterations in other antigens, and changes in the levels of several glycosyltransferases in cancerous tissues.
  • (16) Based on several previous studies, which demonstrated that sorbitol accumulation in human red blood cells (RBCs) was a function of ambient glucose concentrations, either in vitro or in vivo, our investigations were conducted to determine if RBC sorbitol accumulation would correlate with sorbitol accumulation in lens and nerve tissue of diabetic rats; the effect of sorbinil in reducing sorbitol levels in lens and nerve tissue of diabetic rats would be reflected by changes in RBC sorbitol; and sorbinil would reduce RBC sorbitol in diabetic man.
  • (17) These four antigens consisted of S of MNSs blood group, Lua of Lutheran blood group, and K and Kpa of Kell-Cellano blood group.
  • (18) Blood was collected from pups and dams to determine its caffeine concentration.
  • (19) However, after the cessation of this treatment Streptococcus viridans grew in her blood again.
  • (20) These findings suggest that clonidine transdermal disks lower blood pressure in hypertensive patients, but produce local skin lesions and general side effects.

Penumbra


Definition:

  • (n.) An incomplete or partial shadow.
  • (n.) The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light.
  • (n.) The part of a picture where the shade imperceptibly blends with the light.

Example Sentences:

  • (1) Our analysis showed that the interpolation errors are proportional to the curvature of the dose distribution and are relatively high in regions on either side of, but not including, the steepest part of the penumbra.
  • (2) Analysis of the penumbra width of cross dose distributions, as a function of field sizes, allowed us to postulate that the dmax shift could be due to the phantom scattered photons, which in turn were generated by the collimator scattered photons.
  • (3) If true, this is the first demonstration of the ischemic penumbra by MR imaging and may reflect our use of Wistar rats, a new image analysis technique, and ultra-high resolution MR imaging.
  • (4) The combination for this applicator of sharp penumbra and low out-of-field dose leads to reduced lung and opposite breast doses.
  • (5) An extracellular acidosis that occurs in the penumbra zone was investigated in vitro as to its role in the formation of cytotoxic cell swelling.
  • (6) The ischemic thresholds for the initial increase in CMRG and the complete depletion of ATP content represent the metabolic equivalent of the penumbra zone and provide a basis for the evaluation of therapeutic procedures for the treatment of stroke.
  • (7) If the entire cross-section is blocked, the point will be in the umbra of the shadow; if only a portion of the light is blocked, the point will be in the penumbra of the shadow.
  • (8) The mechanisms involved in this sequence of events and the role of pH changes in the development of the so-called "ischaemic penumbra" are discussed.
  • (9) In the light of these findings, we suggest that use of a selective antagonist of LTs may be helpful in reducing the ischemic penumbra during acute cerebral ischemia by controlling the vasogenic edema.
  • (10) Opening the hinge adjustment restores field flatness, without changing penumbra or the inverse square law behavior of the teletherapy unit.
  • (11) The area of "penumbra" could be estimated in regions with CBF value just above this threshold.
  • (12) In the penumbra zone, comparable trends were noted in OER and CMRO2 but the difference in the changes between the two groups did not reach statistical significance.
  • (13) The agreement is within experimental errors both in the penumbra region and along the central ray of the asymmetric field.
  • (14) These results confirm the concept of a metabolic penumbra.
  • (15) These wedges were designed to increase the penumbra width at the field junction from about 1.5 to about 3.5 cm, to achieve dose uniformity.
  • (16) These studies suggest that 1) the expression of 72-kd heat-shock protein in neurons precedes the development of ischemic cellular alterations detectable by conventional hematoxylin and eosin light microscopy methods; 2) there is a hierarchy of cell types and anatomic sites that express 72-kd heat-shock protein, and this hierarchy reflects cellular and anatomic vulnerability to ischemic cell damage; and 3) 72-kd heat-shock protein induction in neurons bordering a necrotic ischemic core may be the morphological equivalent of the ischemic penumbra.
  • (17) While within the penumbra, some direct sunlight falls on the Moon but little darkening of the disc will be noticed until a few minutes before the Moon begins to enter the umbra at 19:23.
  • (18) Measurements with the diode interfaced to an X-Y recorder required only a fraction of the time required with the chambers, minimizing error due to change in machine output, and permitted resolution of isodose lines in the penumbra.
  • (19) A typical spot has a central dark umbra, surrounded by a lighter penumbra.
  • (20) The rate in the penumbra differed (P = .01) from that in the predicted low-dose region, where scotoma did not increase with time.