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  • 1985-1989  (3)
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Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 334 (1988), S. 309-313 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Single ions in miniature traps can be imaged by using laser light to stimulate fluorescence radiation. At the same time, radiation pressure can be used to bring them nearly to rest. When a small number of ions are trapped, phase transitions can be observed between a chaotic cloud and an ordered ...
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The prevalence ofChlamydia trachomatis infection in a population of women with no symptoms of sexually transmitted disease was investigated. These women, aged 35–55 years, participated in a screening program for cervical cancer. With the use of a direct immunofluorescence method, 109 out of 2,470 smears tested were positive forChlamydia trachomatis, indicating an overall prevalence of 4.4%. No changes in prevalence were found when five-year cohorts of this group were analyzed, indicating that age-dependent changes or epidemiological factors do not result in a different (decreased) prevalence over the ages 35 to 55 years. The prevalence ofTrichomonas vaginalis and fungi, as detected by cytological screening, was lower than that observed forChlamydia trachomatis: 3.1 and 2.1%, respectively. Of the 109 smears positive forChlamydia trachomatis, 90 showed cervical cells with reactive changes (out of 1,490 smears with PAP II), whereas no cytological changes were found in 15 cases (out of 884 smears with PAP I). Changes suggestive of mild or moderate dysplasia were found in only four cases (out of 93 smears with PAP III). The results indicate thatChlamydia trachomatis is associated with reactive changes of endocervical cells and raise serious questions about whether prevention of possible secondary effects such as infertility and pelvic inflammatory disease can be achieved by a combined screening program for cervical cancer andChlamydia trachomatis.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 13 (1989), S. 61-67 
    ISSN: 1434-6079
    Keywords: 33.20.K ; 33.80.G ; 36.90
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Photodissociation spectra of the molecular ion CH3I+ were obtained with a three stage quadrupole mass spectrometer. Starting from the $$\tilde X^2 E_{3/2} $$ ground state, theà 2 E 1/2 state was excited with a stilbene 3 cw dye laser. This state predissociates to CH + 3 +I. Measuring the intensity of the CH + 3 fragment ions as a function of the wavelength of the exciting laser, a spectrum showing vibrational and rotational structure was obtained. The vibrational structure was assigned to three progressions ofv 3 and new vibrational frequencies were determined. From a computer simulation of the (0, 1, 10) band rotational constants were derived. In particular, their dependence on the vibrationv 3 was studied.
    Type of Medium: Electronic Resource
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