of successful treatment in achalasia with timed barium

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a section of the journal

"clarify a vision that will guide the decisions of those responsible for determining young adolescent educational programs... " Middle schools throughout the country have used these beliefs as guidelines in creat-ing a vision and promoting change in their schools. he National Middle School Association believes: N Developmentally responsive middle level schools are character-h ized by: ~ / Educators committed to young adolescents ~ / A shared vision. / High expectations for all. / An adult advocate for every student J Family and community partnerships J A positive school climate Therefore, developmentally responsive mid-dle level schools provide: J Curriculum that is challenging, integrative, and exploratory / Varied teaching and learning approaches that promote learning

and associates (pp. 528-534). Infectious death is not unique to cancer patients. Pneumonia is still a common cause of death in this country. Sir William Osier once described pneumonia as the old man's friend to emphasize that pneumonia was often the final illness and a consequence of irreversible or

use in clinical medicine. Some are effective in the picomolar range but MAO B from different mammalian species shows remarkable differences in sensitivity to these agents.- Singer, T. P., Ramsay, R. R. Monoamine oxidases: old friends hold many surprises. FASEBJ. 9, 605-610 (1995)

he past five years have seen a very definite trend in microscopy: Microscopes of all types have become the front end of imaging systems. Microscopy at PITTCON 2000 takes this trend to a new level. Microscopes are now the front end of truly analytical systems (Figure 1). Chemical analysis is old hat

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Immunohistochemical staining is useful in the diagnosis of Helicobacter pylori–induced gastritis. The authors encountered gastric resection specimens with an unusual pattern of reactivity on H pylori immunostains where the typical morphology of the organism was not recognizable, but the characteristic chronic gastritis associated with infection was present. The authors sought to explore this phenomenon by retrospectively reviewing and immunostaining 28 gastric resection specimens for H pylori. Six cases with large clumps of immunohistochemically positive but morphologically unrecognizable material were identified on light microscopy, corresponding on electron microscopy to clusters of predominantly coccoid H pylori, some located intracellularly. Such organisms were not identifiable without immunohistochemistry, and the phenomenon was not encountered in gastric biopsies. The authors conclude that this staining pattern reflects true H pylori infection that is not diagnosable without immunohistochemistry. Based on its occurrence only in resections, it may be the result of hypoxic or other stress induced when the mucosa is not promptly fixed.

Abstract The Smith Chart was developed by P. H. Smith of Bell Telephone Labs in 1939 to avoid tedious calculations involving complex numbers. It was used by engineers developing microwave systems in World War II. It has since become a widely used tool for the analysis and design of transmission line circuits and microwave circuit elements. Even after the advent of modern computers with powerful complex arithmetic tools, the Smith Chart continues to be utilized heavily. It has become such a standard that we continue to teach Smith Charts in our Electromagnetics classes and Microwave CAD packages commonly display their results on Smith Charts. NI LabVIEW, which is the software tool used in the Fields and Waves class at our institution, has recently made a Smith Chart utility available. This paper will investigate the incorporation of electronic Smith Charts in the instruction of transmission line techniques and provide examples that will marry the time-honored paper / pencil / protractor / compass tool with the state of the art computational tool.