Ultraviolet Photochemistry of Diacetylene: The Metastable C<sub>4</sub>H<sub>2</sub>* Reaction with Ethene, Propene, and Propyne
作者:Rex K. Frost、Caleb A. Arrington、Christopher Ramos、Timothy S. Zwier
DOI:10.1021/ja953757c
日期:1996.1.1
state from which reaction occurs. The short length of the tube (8 mm) serves to quench the reaction after 10−30 μs so that primaryproducts and not polymer are formed. Upon exiting the reaction tube, the photochemical products are soft ionized with 118 nm vacuum ultraviolet light and mass-analyzed in a linear time-of-flight mass spectrometer. The primaryproducts in the reactions with ethene (C6H4
Thomas, Phillip S.; Bowling, Nathan P.; McMahon, Robert J., Journal of the American Chemical Society, 2009, vol. 131, p. 8649 - 8659
作者:Thomas, Phillip S.、Bowling, Nathan P.、McMahon, Robert J.
DOI:——
日期:——
Swallowing Disorders in the Elderly
作者:Joshua S. Schindler、James H. Kelly
DOI:10.1097/00005537-200204000-00001
日期:2002.4
AbstractChanges that occur as a natural part of senescence in the complex action of deglutition predispose us to dysphagia and aspiration. As the “baby‐boomers” begin to age, the onset of swallowing difficulties will begin to manifest in a greater number of our population. Recent advances in the evaluation of normal and abnormal swallowing make possible more precise anatomical and physiological diagnoses. Coupled with an understanding of swallowing physiology, such detailed evaluation allows greater opportunity to safely manage dysphagia with directed therapy and appropriate surgical intervention. The current study is a discussion of the changes that occur in deglutition with normal aging, contemporary evaluation of swallowing function, and some of the common causes of dysphagia in elderly patients.
SCHULZE K., Z. CHEM. <ZECE-AL>, 1975, 15, NO 6, 216-217