It is a fairly common misconception that monocular aphakes have not performed well with hard contact lenses over the long term. To investigate this the records of 148 monocular aphakes who were fitted successfully to hard contact lenses between 1968–1973 were reviewed. Ninety-four percent of this group were still wearing their lenses an average of 5.1 years later, while 6% had stopped. Both groups were studied for age, sex distribution, Nike Lunarglide 4
duration of lens wear, and reasons for stopping.
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5′ end of each polymerase II transcript is capped by a methylated guanosine triphosphate. The cap earmarks the mRNA for subsequent processing and nucleocytoplasmic transport, protects the mRNA from degradation and promotes efficient initiation of protein synthesis. The recently solved structures of capping enzymes and cap–protein complexes shed light on how the 5′ ends of mRNAs are modified, and reveals the mechanisms by which the cap is recognized and how it functions in a diverse range of processes.
Behzad conjectured in 1965 that a simple graph G can always be totally coloured using two more colours than the maximum degree in G, Δ(G). If the conjecture is true, then the total colouring number of a graph is always equal to either Δ(G) + 1, or Δ(G) + 2. A weakening of Behzad's conjecture is proved here by presenting an integer programming
formulation of the problem and showing that its linear programming relaxation has its value bounded between Δ(G) + 1 and Δ(G) + 2.