Pneumocholecystitis

Parsons, Livingston

doi:10.1016/0002-9610(63)90058-8

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…In the case which we have described the degree of necrosis together with the great tension within the gall bladder and the lack of surrounding adhesions suggested that free perforation was a distinct possibility. On the other hand there have been many reports of successful conservative management (McCorkle and Fong, 1942;Edinburg and Geffen, 1958;De Jode, 1960;Parsons, 1963;Rosoff and Meyers, 1966). McCorkle and Fong (1942) were able to culture Clostridia and E. coli from the bile obtained on duodenal aspiration in these medically managed patients.…”

Section: Managementmentioning

confidence: 97%

Acute emphysematous cholecystitis

McKibbin

Parks

1974

Postgraduate Medical Journal

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Section: Managementmentioning

confidence: 97%

Acute emphysematous cholecystitis

McKibbin

Parks

1974

Postgraduate Medical Journal

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Interfacial synthesis and characterization of random and segmented block bisphenol A–tetrabromobisphenol A copolycarbonates

Marks

1994

J of Applied Polymer Sci

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SYNOPSISThe chain sequence architecture of bisphenol A-tetrabromobisphenol A copolycarbonates depends on the process employed to prepare them. An interfacial process involving a singlestep phosgenation produces a segmented block copolymer, contrary to previous assumptions. An interfacial two-step phosgenation process allows the preparation of random copolycarbonates. In each process the control of the pH of the aqueous phase of the two phase reaction mixture is required to achieve complete comonomer conversion to copolymer and to obtain the desired sequence architecture. The chain sequence architecture of these copolycarbonates can be estimated by examination of their Fourier transform infrared spectra. The relative bandwidth of the carbonate stretching band is roughly proportional to the copolycarbonate number average sequence length, allowing the facile distinction between block and random copolymers. The number average sequence lengths of these copolycarbonates were quantified by carbon-13 NMR spectroscopy. These analyses showed that the one-step phosgenation process yields segmented block copolycarbonates having number average sequence lengths from about 4 to 9, and the two-step phosgenation process produces random copolycarbonates having sequence lengths from 1.6 to 2. The distribution of the aromatic carbon triads of these random copolymers shows them to have an alternatesegmented block architecture, which is consistent with the synthesis conditions, rather than a statistically random distribution of comonomer segments. Dynamic mechanical analysis of two of these copolycarbonates shows a dependence of their low temperature secondary transitions on the copolymer sequence structure. A segmented block copolycarbonate, having a number average sequence length of about 4, displays two distinct peaks in its tan 6 curve at temperatures corresponding to those transitions observed in the respective homopolymers. The tan 6 curve of a random copolycarbonate shows a single low temperature secondary transition midway between those of the homopolymer. 0 1994 JohnWiley & Sons, Inc.

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Cholezystitis

Wittekind¹

2000

Spezielle Pathologische Anatomie

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Pneumocholecystitis

Cited by 6 publications

References 17 publications

Acute emphysematous cholecystitis

Acute emphysematous cholecystitis

Interfacial synthesis and characterization of random and segmented block bisphenol A–tetrabromobisphenol A copolycarbonates

Cholezystitis

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