A 7-year-old Korean girl presented with an 8-month history of an erythematous hard plaque on her left hand. There was no history of trauma. On physical examination, a 1.4 0.8-cm firm plaque was observed on the ulnar surface of the left hand at the metacarpophalangeal level (Figure). Histopathologic examination showed moderately cellular fibroblasts throughout the dermis. Hematoxylineosin staini...

None of the methods which have been used for isolating Z-(+)lysine from plant extracts and protein hydrolysates is ideal. The oldest method utilizes phosphotungstic acid to precipitate the basic nitrogenous compounds which must be fractionated subsequently (1, 2). In the Kossel-Kutscher silver sulfate-barium hydroxide fractionation (3) the lysine remaining in the final filtrate must be precipit...

Newly developed coated wire electrodes have been developed for determination of cefditoren pivoxil (CTP) in pure form, pharmaceutical preparations and in biological fluids. The selective electrodes were fabricated based on the incorporation of cefditoren pivoxil with the ion exchangers, phosphomolybdic acid (CTP-PMA), phosphotungstic acid (CTP-PTA) and a mixture of both (CTP-PMA/PTA). The poten...

Methods are described for determining the relative mass of particles in electron microscope specimens through the measurement of photographic densities in recorded images. These methods were applied to a quantitative study of the amounts of electron stains that could be associated with the particles of tomato bushy stunt virus (BSV) and tobacco mosaic virus (TMV). In the pH range above 2 where ...