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  • 1
    Digitale Medien
    Digitale Medien
    Development of the third generation electron cyclotron resonance ion source : Proceedings of the 7th international conference on ion sources (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 682-684 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The LBNL third generation electron cyclotron resonance (ECR) ion source has progressed from a concept to the fabrication of a full scale prototype superconducting magnet structure. This new ECR ion source will combine the recent ECR ion source techniques that significantly enhance the production of high charge state ions. The design includes a plasma chamber made from aluminum to provide additional cold electrons, three separate microwave feeds to allow multiple-frequency plasma heating (at 10, 14, and 18 GHz or at 6, 10, and 14 GHz) and very high magnetic mirror fields. The design calls for mirror fields of 4 T at injection and 3 T at extraction and for a radial field strength at the wall of 2.4 T. The prototype superconducting magnet structure which consists of three solenoid coils and six race track coils with iron poles forming the sextupole has been tested in a vertical Dewar. After training, the sextupole magnet reached 105% of its design current with the solenoids off. With the solenoids operating at approximately 70% of their full design field, the sextupole coils operated at 95% of the design value which corresponds to a sextupole field strength at the plasma wall of more than 2.1 T. © 1998 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1149169
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  • 2
    Digitale Medien
    Digitale Medien
    Cryogenic, all-sapphire, Fabry–Perot optical frequency reference (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 955-960 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: This paper presents a design for a Fabry–Perot optical frequency reference resonator which utilizes the high dimensional stability of cryogenically cooled sapphire. We show that cryogenic sapphire cavities can achieve substantial improvements in frequency stability compared with room-temperature cavities. The design of a laser stabilization system based on such a resonator is discussed. Estimates of fundamental and practical limitations on the frequency stability of such a system suggest that a fractional frequency stability of 10−16 over integration times from 10 to 104 s is possible. The fundamental limits to stability from quantum shot noise, radiation pressure fluctuations, and thermal noise are overwhelmed by practical limits which arise due to mechanical, thermal, and optical effects. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1145629
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  • 3
    Digitale Medien
    Digitale Medien
    THE NATURE OF THE TWO PROTEINS OF BRAIN SPECIFIC ANTIGEN 14-3-2 (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 30 (1978), S. 0 
    Details
    ISSN: 1471-4159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: The three isoenzymes of rat brain enolase (2-phospho d-glycerate hydrolase EC 4.2.1.11.) χχ, χγ and γγ were separated by ion-exchange chromatography and were tested for reaction with an antiserum against brain specific antigen 14-3-2. This monospecific antiserum affects the enolase activity of only the χγ and γγ isoenzymes.Immunoelectrophoretic experiments show that the two proteins which react as 14-3-2 both contain γ enolase subunits, and one of these also contains χ enolase subunits.It is concluded that the 14-3-2 antigen and the γ enolase subunit are identical, and that the two proteins which react immunologically as 14-3-2 are the χγ and γγ enolase isoenzymes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1471-4159.1978.tb07050.x
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  • 4
    Digitale Medien
    Digitale Medien
    Cavitation in Bearings (1979)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 11 (1979), S. 35-65 
    Details
    ISSN: 0066-4189
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Maschinenbau , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.fl.11.010179.000343
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  • 5
    Digitale Medien
    Digitale Medien
    QUANTITATIVE IMMUNOFLUORESCENCE STUDIES (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 254 (1975), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1975.tb29164.x
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  • 6
    Digitale Medien
    Digitale Medien
    An analysis of the dynamic response of stomatal conductance to a reduction in humidity over leaves of Cedrella odorata (1999)
    Oxford, UK : Blackwell Science Ltd.
    Plant, cell & environment 22 (1999), S. 0 
    Details
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Single leaves of 3-month-old Cedrella odorata seedlings were exposed to a step reduction in the ambient dew point. The resultant time series of dynamic variations in leaf surface water vapour concentration, leaf surface water vapour concentration gradient, transpiration rate and stomatal conductance to water vapour, are analysed using the data-based mechanistic (DBM) modelling methodology of Young (e.g. Young & Lees 1992; Minchin et al. 1996 ). It is shown that the identified second-order, dynamic model between transpiration rate (as the input) and stomatal conductance (as the output) provides an appropriate, physiologically meaningful, description of the system. In particular, the dynamic relationship between these two variables is remarkably linear and can be resolved in terms of two parallel, first-order, subsystems; a model which complements the results of Cowan (1977) for cotton. The model is also compared with the recently published simulation model of Haefner, Buckley & Mott (1997).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-3040.1999.00446.x
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  • 7
    Digitale Medien
    Digitale Medien
    The use ofdomestic steam cleaning for the control of house dust mites (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 25 (1995), S. 0 
    Details
    ISSN: 1365-2222
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background Control of dust mites using extremes of temperature is un alternative to the use of acaricides. In ihe past we have attempted control by freezing with liquiid nitrogen. The present paper deals with the opposite exlrcnic, the use of steam.Objective To assess the feasibility inid effectiveness of a domestic steam cleaner for the control of dust mites. its effect on mite populations and concentrations of the allergen Der p I.Methods A domestic steam cleaner was used to treat earpet squares that had been seeded in the laboratory with known numbers of dust mites (Dermatophagoides pterpmussomis). The number of live mites was monitored for a period of 4 months in eight treated earpet squares and eight controls. Dust samples were taken from 12 standardized areas of carpet in a tenement flat in Glasgow, UK., before and after steam cleaning treatmet. and the concentration of allergen Der p 1 was compared with 12 adjacent. control areas.Results No live mites were found at any time in the treated carpet squares, whereas in the control squares geometric mean mite population density rose frotn 11 after 3 days to 39 after 1 month, 66 after 2.122 after 3 and 185 after 4 months. There was a mean reduetion of 8.7% in Der p I concentration (3.3-0.44 μg/g) compared with a reduction of 4.7% (2.22-2.l16μg/g) in control areas, a difference that was statistically significant at the 5% level.Conclusion These data indicate that steam cleaning has considerable potential as an highly effective and efficient method of killing dust mites and reducing concentrations of Der p 1 in domestic premises.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2222.1995.tb03252.x
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  • 8
    Digitale Medien
    Digitale Medien
    Graeser, Andreas: Platons Ideenlehre. Sprache, Logik und Metaphysik. Eine Einführung : Bern and Stuttgart, Paul Haupt, 1975 (1977)
    Cambridge : Cambridge University Press
    The @classical review 27 (1977), S. 199-200 
    Details
    ISSN: 0009-840X
    Quelle: Cambridge Journals Digital Archives
    Thema: Klassische Philologie, Byzantinistik, Mittellateinische und Neugriechische Philologie, Neulatein
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1017/S0009840X00223779
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  • 9
    Digitale Medien
    Digitale Medien
    Fetal pathology in intrauterine death due to parvovirus B19 infection (1996)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 103 (1996), S. 0 
    Details
    ISSN: 1471-0528
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Objective To study the pathological features of fetuses dying because of parvovirus B19 infection, with particular reference to the presence of hydrops; to assess the usefulness of immunochemistry as a screening method for the detection of parvovirus infection at post-mortem examination.Design Review of clinical, sonographic, serological and pathological data; immunohistochemical staining of post-mortem tissue.Sample Cases of intrauterine fetal death occurring during the 18-month period January 1993 to June 1994 inclusive, referred for post-mortem examination to the Pathology Department, Royal Victoria Infirmary, Newcastle upon Tyne.Results Eleven cases of fetal death due to parvovirus infection were identified. Seven fetuses were less than 18-week size. Three fetuses showed conspicuous hydropic change. One of the 11 cases was detected for the first time by retrospective immunochemical screening. Of cases originating from the Newcastle district, parvovirus infection was responsible for about 10YO of all non-malformed fetal deaths occurring between 10 and 24 weeks of gestation referred for pathological examination.Conclusions During the period of study, parvovirus infection was a relatively common cause of mid-trimester fetal death. Many fetuses dying because of this infection are not noticeably hydropic, and the possibility of parvovirus infection should be considered in any case of intrauterine fetal death. Immunochemistry can be used to confirm the histopathological diagnosis, and may be of particular help where there is advanced autolysis; immunohistochemical screening may detect occasional cases not initially identified by examination of routinely stained tissue sections.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1471-0528.1996.tb09664.x
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  • 10
    Digitale Medien
    Digitale Medien
    The health of physical anthropology in Britain (1978)
    [s.l.] : Nature Publishing Group
    Nature 272 (1978), S. 10-10 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] SIR,-We were dismayed to read Bernard Campbell's article on the state of physical anthropology in the UK. We consider t presents a totally false picture. In the first half of this century there were two university teaching posts in physical anthropology in the country. There are at least 16 now, ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/272010c0
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