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Melanotic ganglioglioma of the pineal region (1989)

Hunt, S. J. ; Johnson, P. C.

Springer

Acta neuropathologica 79 (1989), S. 222-225

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ISSN: 1432-0533

Keywords: Brain tumor ; Melanotic ganglioglioma ; Pineal ; Melanotic neuroectodermal tumor

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary A melanotic ganglioglioma was biopsied in the pineal region of a 12-month-old girl who preoperatively underwent a ventriculo-peritoneal shunt for hydrocephalus and postoperatively received radiotherapy. The tumor was subtotally excised when the girl was 7 years and 4 months of age. Histologically, it demonstrated mature neurons in disorganized clusters and in well-differentiated cerebrum-like tissue, rare binucleated neurons, glia similar to normal gray matter, and bands of fibrous tissue containing heavily pigmented cells. Ultrastructurally, melanosomes of stages I to IV were identified in the pigmented cells. An origin involving retinal differentiation of the primitive pineal gland was not supported; the tumor was negative for both retinal S-antigen (MAbA9-C6) and cellular retinal-binding protein (CRALBP). This report demonstrates the ability of a cerebral neoplasm to contain neurons, glia, and melanin-containing cells; all of which are neuroectodermally derived.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00294383

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Novel curing systems for chlorosulfonated polyethylene (1964)

Nersasian, A. ; King, K. F. ; Johnson, P. R.

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 8 (1964), S. 337-354

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ISSN: 0021-8995

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: Polyfunctional alcohols, acyclic, cyclic, and heterocyclic imines, and organotin oxides have been studied as crosslinking agents for chlorosulfonated polyethylene. Mechanisms for the crosslinking reactions involving the sulfonyl chloride moiety have been proposed. Differences in curing activity have been correlated with structural modifications of the curing agents consistent with classical chemical reactions for nonpolymeric systems. Of the curing systems examined, the polyols provide nontoxic, low cost, safe-processing formulations offering excellent physical properties which have found use in practical commercial applications.

Additional Material: 2 Ill.