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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 3719-3721 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental results on pulsed corona and dielectric-barrier discharge processing of very dilute concentrations of NO in N2 are presented. These NO reduction experiments measure the G value for electron-impact dissociation of N2 and are used to infer the effective electron mean energy in an N2 discharge plasma at atmospheric pressure. The data have been obtained from three different laboratories using widely differing electrode structures, voltage wave forms, power measurements, and chemical analyses. The NO reduction yields from the discharge reactors tested are all similar, corresponding to an electron mean energy of 4.0±0.5 eV. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 733 (1994), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 150 (2004), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  It is well accepted that ultraviolet radiation from the sun can induce and promote growth of skin tumours. Skin cancer develops as a consequence of multiple genetic hits, where an initial, important step includes proliferation of cells susceptible to malignant transformation. Foci of morphologically normal epidermal keratinocytes overexpressing p53 protein are common in chronically sun-exposed skin. Such foci have previously been shown to represent expanding clones of p53-mutated keratinocytes. Although several characteristics concerning epidermal p53 clones remain to be resolved, an important role in skin carcinogenesis is anticipated. The density of epidermal p53 clones in human skin is largely unknown.Objectives  To compare the occurrence of epidermal p53 clones in skin surrounding cancers with that in skin surrounding benign melanocytic naevi. To assess the influence of age on frequency and size of epidermal p53 clones in human facial skin.Methods  We have analysed the number and sizes of epidermal p53 clones in skin specimens from patients with squamous cell carcinoma (SCC), basal cell carcinoma (BCC) and benign melanocytic naevi. Cases included normal facial skin from four different age groups. Tissue sections were immunohistochemically stained and the presence of p53 clones was recorded. Approximately 1·4 m of epidermis from a total of 112 biopsies was analysed.Results  We found 128 epidermal p53 clones in biopsy specimens from 112 patients. The results showed that the number and size of p53 clones increase with age. In normal skin adjacent to SCC p53 clones were significantly more numerous and greater in size in comparison with those in normal skin both adjacent to benign naevi and adjacent to BCC. Interestingly, normal skin in the close vicinity of BCC and melanocytic naevi showed similar results regarding both number and size of epidermal p53 clones.Conclusions  Our findings suggest a connection between development of epidermal p53 clones and SCC.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 78 (1977), S. 1383-1389 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 343 (1980), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. In gallbladder carcinoma, studies on the prime target of genetic alterations and gene therapy in human gallbladder malignancies, the p53 tumor suppressor gene, have been focusing on this gene’s immunohistochemical detection. From November 1991 to October 1993, seven patients suffering from gallbladder carcinoma underwent surgical resection. Cancerous and normal liver tissues were obtained immediately after surgery, snap-frozen in liquid nitrogen, and stored at −80°C for immunohistochemistry and DNA isolation. Exons 5, 6, 7, and 8 of the p53 gene were completely sequenced following polymerase chain reaction (PCR) amplification of a 1574-bp fragment. Missense mutations were detected in the cancerous tissues of two patients: one transition each on codons 134 (Phe→Leu) and 146 (Trp→Arg). Immunohistochemical p53 staining was positive in the latter patient only. This is the first report on sequence analysis and mutagenesis of the p53 gene in Caucasian patients with gallbladder cancer. Both mutations were transitions and seem to represent a rather rare event. The possible impact of p53 mutagenesis on gallbladder tumorigenesis requires evaluation in larger studies.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 72 (1994), S. 381-384 
    ISSN: 1432-1440
    Keywords: Leiomyosarcoma ; Rectum ; Endorectal ultrasound
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Leiomyosarcomas of the rectum are uncommon neoplasms accounting for fewer than 1% of all malignancies of the colon and rectum. Approximately 215 cases have been described in the literature. Distinction from leiomyoma is often difficult, but regarding dignity is important. The case reported is that of a 68-year-old man in whom a 2.2-cm rectal mass covered by mucosa was diagnosed by rectoscopy and endorectal ultrasound. After treatment by wide local excision the histological specimen revealed a low-grade, highly differentiated leiomyosarcoma. Due to the lack of a large series of this disease, there is disagreement over the therapeutic strategy. At the moment a selective treatment approach seems to be the most frequenty advocated. Large tumors and those extending beyond the rectal wall are treated by radical surgical resection. Leimyosarcomas less than 2.5 cm in size and confined to the bowel wall can be treated by wide local excision. Endosonography can provide exact assessment of tumor size and expansion and is of great value in selecting the appropriate treatment.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-2277
    Keywords: Glioblastoma, liver transplantation ; Liver transplantation, glioblastoma ; Malignancy, donor related, liver transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The transmission of donor-related malignancies by organ transplantation is a rather rare event. There has only been one report on the development of a brain tumor metastasis in liver transplantation. From September 1988 to January 1993, 342 donor hepatectomies with subsequent transplantation were performed at our center. The main donor diagnoses included subarachnoidal bleeding (n=128; 37.4%), isolated head injury (n=114; 33.3%), multiple injuries (n=55; 16.1%), primary cerebral neoplasia (n=13; 3.8%), and other (n=32; 9.4%). Primary cerebral neoplasia included glioblastoma (n=4), meningioma (n=3), astrocytoma (n=2), angioma (n=2), neurocytoma (n=1), and ependymoma (n=1). In the group of donors suffering from primary cerebral neoplasia, procured organs other than the liver included kidneys (n=20), combined kidneys and pancreata (n=1), pancreata (n=2) hearts (n=8), combined hearts and lungs (n=1), and single lungs (n=1). Follow-up of the respective graft recipients ranged from 28 to 68 months (median 43 months). Recurrent malignancy was observed once, in a liver graft recipient. The donor, a 48-year-old female, had undergone surgical resection of an intracerebral multiform glioblastoma and died 4 months later of a relapse in the brain stem. The 28-year-old female recipient had undergone transplantation for an autoimmune-hepatitic cirrhosis. Four months later, histopathological examination of an intraperitoneal and intrahepatic mass revealed a poorly differentiated, small-cell pleomorphic cancer, identified as a glioma metastasis by S100-and glial fibrillary acidic protein immunohistochemical staining. The patient died 6 months post-transplantation. On autopsy, no further neoplastic lesions were detected. Our review adds a second reported case of a liver graft-transmitted brain tumor to the literature and the fourth donor-related malignancy after hepatic transplantation in general.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2277
    Keywords: Selective bowel decontamination, liver transplantation ; Liver transplantation, selective bowel decontamination ; Infections, liver transplantation, serective bowel decontamination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Bacterial and fungal infections are a major cause of morbidity and mortality after orthotopic liver transplantation. In the immunocompromised host, infections are thought to arise from the gut, which is almost always colonized with potential pathogens. Using oral selective bowel decontamination (SBD), potential pathogens can be eradicated from the gut and infections prevented. In this catamnestic study we have reviewed gastrointestinal colonization, bacterial and fungal infections, and bacterial resistance to standard antibiotics in our first 206 liver transplant patients while under SBD. With few exceptions, gram-negatives were eradicated from the gastrointestinal tract and secondary colonization was inhibited. In spite of unsatisfactory elimination of Candida, probably because nystatin doses were too low, Candida infections were rare (n=4) and none was fatal. One and two-year survival rates were 93% and 92%, respectively. The bacterial and fungal infection rate was 27.8% with an infection-related mortality of 1.95%. Infections with aerobic grampositive bacteria prevailed and only 11 gram-negative and 11 fungal infections occurred; among the latter, Aspergillus and Mucor were the most serious and responsible for three of the six deaths in this series. With regard to the development of resistance, we found an increasing number of enterococci and coagulase-negative staphylococci resistant to ciprofloxacin and imipenem, respectively, but unlikely as a consequence of SBD.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 119 (1992), S. 91-93 
    ISSN: 0942-0940
    Keywords: Traumatic dural sinus injury ; operative technique ; outcome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a period of 13 years 978 cases of severe head injuries were operated on in our clinic. An analysis of the medical reports includes injuries of the superficial dural sinus (39 cases=4%): among these injuries of the anterior and central part of the superior sagittal sinus (66 per cent), injuries of the transverse sinus (18 per cent), injuries of the posterior part of the superior sagittal sinus (8 per cent), and combined injuries of different dural sinuses (8 per cent). Clinical data, i.e. the causes of accident, radiological examination results, intracranial lesions, operation technqiues and outcome are analysed and discussed. The analysis of cases with dural sinus injuries shows a high mortality rate (total mortality rate: 16 patients=41%; intra-operative mortality rate: 8 patients=20%).
    Type of Medium: Electronic Resource
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