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B C Powell

Publications and source records attributed to B C Powell.

39 records · Page 3Linked to original sources
PubMed1979

Isolation of messenger RNA coding for the "fast" protein of embryonic chick feathers.

The messenger RNA coding for the "Fast" protein of embryonic chick feathers has been purified from the overwhelming relative amounts of keratin mRNA which are present in the developing feathers. The "Fast" protein mRNA represents about 4-8% of the total mRNA population of the feather. Despite differences between the size of the "Fast" proteins and the keratins the two mRNA species are very similar in molecular weight as judged by electrophoresis under denaturing conditions. However, by electrophoresis in 8 M urea gels at 55 degrees C, the "Fast" protein mRNA could be separated from keratin mRNA, presumably reflecting differences in messenger RNA secondary structure.

Animals↗
PubMed1977

Recurrent subareolar abscess of the breast and squamous metaplasia of the lactiferous ducts: a clinical syndrome.

When squamous metaplasia of the lactiferous ducts occurs, the normal cuboidal epithelium lining the lactiferous ducts is replaced by squamous epithelium, leading to intraluminal accumulation of epithelial debris. Recurrent subareolar abscess is a common co-feature of the disease. The chronicity of suppuration is related to a general unfamiliarity with this entity and its underlying pathogenesis and failure to recognize the inadequacy of simple incision and drainage. Recent experience with six patients with recurrent subareolar abscess suggests that cure requires excision of the disease duct(s) and abscess cavity in continuity with the nipple inversion, which also is seen with this problem. The clinical triad of recurrent subareolar abscess, intermittent periareolar drainage, and (possibly) nipple inversion should alert the practitioner to this entity. Appropriate initial operative management will minimize recurrence.

Abscess↗