What's the difference between eight and octad?

Eight


Definition:

  • (n.) An island in a river; an ait.
  • (a.) Seven and one; as, eight years.
  • (n.) The number greater by a unit than seven; eight units or objects.
  • (n.) A symbol representing eight units, as 8 or viii.

Example Sentences:

  • (1) These eight large plasmids had indistinguishable EcoRI restriction patterns.
  • (2) In the fall of 1975, 1,915 children in grades K through eight began a school-based program of supervised weekly rinsing with 0.2 percent aqueous solution of sodium fluoride in an unfluoridated community in the Finger Lakes area of upstate New York.
  • (3) A series of eight patients with multiple meningiomas is presented.
  • (4) Eight-week-old virgin untreated female mice were induced to ovulate using equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG), and were then caged with males overnight.
  • (5) Development at two to 15 months of age in the 19 surviving infants was normal in nine, suspect in eight, and severely delayed in two patients.
  • (6) Eight other children (20%) had normal or borderline elevation of CPK-MB fraction and EKG abnormalities combined with abnormal echocardiograms or radionuclide angiograms, and were considered to have sustained cardiac concussion.
  • (7) By the time Van Kirk returned to the US in June 1943, he had flown 58 combat and eight transport missions.
  • (8) We studied the effect of low-dose intrathecal morphine (0.00-0.20 mg) on pain relief and the incidence of side effects after cholecystectomy in 139 patients divided into eight groups according to intrathecal morphine dose: groups 1 (0.00 mg), 2 (0.04 mg), 3 (0.06 mg), 4 (0.08 mg), 5 (0.10 mg), 6 (0.12 mg), 7 (0.15 mg), and 8 (0.20 mg).
  • (9) "I was eight in 1983, but I remember a plane that flew low over our Bulawayo suburb and army loud-hailers screaming: 'You are surrounded.'
  • (10) Eighty-eight patients (97%) had a stable fixation and 77 (85%) had resumed preoperative activity or were working but with a residual deficit.
  • (11) Age-specific MRs for the over-75-year age group were also not related to the winter air temperatures in the eight cities.
  • (12) Due to continued disease relapse in this group (four of eight patients), long-term survivors should not be identified for a minimum of 3.5 years from the time of initial therapy.
  • (13) The IgM antibody was found at high titers in each of 70 patients with inflammatory liver disease and at a low titer in one of six patients with inactive cirrhosis; it was not found in eight carriers with normal liver histology.
  • (14) Affected dogs were from ten breeds and their average age was eight years.
  • (15) This competence persists over the eight measurement points.
  • (16) Eight cases of calcification following anterior dislocation of the head of the radius are described.
  • (17) Six of eight AD and seven of eight vitamin A-adequate dams carried pregnancy to term (greater than or equal to Day 64).
  • (18) In the subgroup of children under age 5 years at the time of diagnosis, 10 of 11 showed neuropsychologic deficits, and eight of 11 had white matter changes.
  • (19) Learning ability was assessed using a radial arm maze task, in which the rats had to visit each of eight arms for a food reward.
  • (20) Eight patients aged 7-15 were using inhaled sympathomimetic aerosols only at the time of buying a nebuliser as compared with most of the older patients, who were using regular oral steroids.

Octad


Definition:

  • (n.) An atom or radical which has a valence of eight, or is octavalent.

Example Sentences:

  • (1) The mollu-series glycosphingolipids, O-alpha-D-mannopyranosyl-(1----3)-O-beta-D-mannopyranosyl-(1----4)-O-bet a-D-glucopyranosyl-(1----1)-2-N-tetracosanoyl-(4E)-sphingeni ne and O-alpha-D-mannopyranosyl-(1----3)-O-[beta-D-xylopyranosyl-(1----2])-O- beta-D-mannopyranosyl-(1----4)-O-beta-D-glucopyranosyl-(1----1)-2-N- tetracosanoyl-(4E)-sphingenine, were synthesized for the first time by using 2,3,4-tri-O-acetyl-D-xylopyranosyl trichloroacetimidate, methyl 2,3,4,6-tetra-O-acetyl-1-thio-alpha-D-mannopyranoside, benzyl O-(4,6-di-O-benzyl-beta-D-mannopyranosyl)-(1----4)-2,3,6-tri-O-benzyl-be ta-D- glucopyranoside 9, and (2S,3R,4E)-2-azido-3-O-(tert-butyldiphenylsilyl)-4-octade cene-1,3-diol 6 as the key intermediates.
  • (2) The octameric subunits model of each enzyme was confirmed by electron micrographs, which showed an octad aggregate, composed of two tetragons face to face.
  • (3) First, the nonspecific interference resulting from Sep-Pak processing was found to be due to hydrophobic impurities in the octade-casilane absorbent which were eliminated by washing the Sep-Pak with tetrahydrofuran and hexane before use.

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