The acute intravenous toxicities of a selection of three potential long-acting local anaesthetics belonging to the series of2- phenoxyethyldialkylamine were determined in mice. Two of the compounds were tertiary amines and the third a quaternary ammonium derivative.The I.V. median lethal dose, (LDso) of one of the tertiary compounds, 21A [N, N- diethyl-2- (2,6- diisopropyl) ethyl amine hyd...

Endogenous insulin is a hormone secreted by the beta cells of the pancreatic islets of Langerhans. Insulin acts via specific membrane-bound receptors on target tissues to regulate metabolism of carbohydrates, proteins and fats. Exogenous insulin, manufactured for pharmacologic use through recombinant DNA technology using either E. coli or Saccharomyces cerevisiae is used as replacement therapy ...

N Engl J Med 2005;353:2169-75. Copyright © 2005 Massachusetts Medical Society. A healthy, multiparous 23-year-old woman requests advice about contraception. Her last child was conceived while she was using oral contraceptives, which she took irregularly. She wants no more children and desires a highly effective and long-acting method of contraception. She is sexually active in a monogamous rela...

In the articles below two contributors discuss recent progress in pathogenesis, management, and diagnosis of some thyroid disorders. Dr. Reginald Hall summarizes the evidence that long-acting thyroid stimulator is an antibody, speculating that after reacting with a thyroid chalone it may trigger off Graves's disease. Dr. R. N. Smith discusses management, and emphasizes that recent progress has ...

Neonatal hyperthyroidism has been thought to result from transplacental passage of long-acting thyroid stimulator (L.A.T.S.) from a mother with Graves's disease. A case is presented here in which no L.A.T.S. was detected in the mother or neonate but another immunoglobulin, L.A.T.S. protector, a specific human thyroid stimulator, was shown to be present in the mother's serum. This stimulator may...

We experimentally demonstrate the technique of light-assisted, templated self-assembly (LATS). We excite a guided-resonance mode of a photonic-crystal slab with 1.55 μm laser light to create an array of optical traps. We demonstrate assembly of a square lattice of 520 nm diameter polystyrene particles spaced by 860 nm. Our results demonstrate how LATS can be used to fabricate reconfigurable str...