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  • 1
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A laser ion source using a CO2 laser focused onto a solid target is under study at CERN for the production of high currents of highly charged heavy ions, for possible use in the preinjector for the large hadron collider. A new expansion and extraction layout was installed in this test facility, improving the alignment and making the target to extraction distance more flexible. A two solenoid beam transport system was studied for providing the matching of the beam to a radio-frequency quadrupole. An electrostatic beam transport using gridded electrostatic lenses was designed and constructed as an alternative to a magnetic system. Results show an increased overall current transmission for the electrostatic case. Investigation of the laser parameters required for the production of 1.4×1010 Pb25+ ions in a 5 μs pulse, has been performed using the TIR-1 laser facility at power densities up to 1014 W cm−2 for a focal spot size of 65 μm. The results of the latest scaling are presented. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: : The influence of different snail species on the quality of spiced-butter preparation was investigated with regard to labeling, using sensory and instrumental methods. Although sensory as well as instrumentally measured quality attributes indicated differences between the compared species, the sensory panel did not express a preference for a particular species. Differences were most significant between Achatina fulica and Helix aspersa, and between these compared to Helix pomatia or Helix lucorum with regard to color (lightness and redness) and texture (hardness and chewiness). Differences between H. pomatia and H. lucorum were insignificant. Consequently, labeling of products prepared from H. lucorum as non-vineyard snails on grounds of scientific reason is not necessary.
    Materialart: Digitale Medien
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  • 3
    ISSN: 1360-0443
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin , Psychologie
    Notizen: Background  It is well known that only a minority of alcohol-dependent subjects seek help and that the majority of alcohol-dependent individuals recover without utilization of formal help. Psychiatric comorbidity is highly prevalent among alcohol-dependent individuals. However, no data are available on the impact of psychiatric comorbidity on natural recovery.Aims  To analyse the impact of non-psychotic psychiatric comorbid Axis I disorders on remission rate and utilization of formal help in alcohol-dependent individuals drawn from a representative general population sample in northern Germany (response rate: 70.2%, n = 4075). Psychiatric diagnoses and utilization of help were assessed in a personal interview using standardized instruments. One hundred and fifty-three life-time alcohol-dependent individuals were assessed, among whom 98 fulfilled the criteria for sustained long-term remission according to the Diagnostic and Statistical Manual version II (DSM-IV) criteria. Any coincidence of DSM-IV non-psychotic Axis I disorders with alcohol dependence was counted as comorbidity. Comorbidity rate in the whole sample was 36.1%.Results  The rate of individuals who remitted from alcohol dependence without formal help was 36.9% in the non-comorbid and 42.6% in the comorbid group. Utilization of formal help was unrelated to comorbidity. Dually diagnosed subjects without a history of help-seeking showed minor differences concerning reasons for not seeking help. Seeking help was not related to schooling, severity of dependence and gender.Conclusion  Data reveal that remission without formal help is equally prevalent among non-comorbid as among comorbid alcohol-dependent individuals. Axis I comorbidity is not related directly to utilization of alcohol-related help. Negative prognoses for untreated comorbid alcohol-dependent individuals are not justified from an epidemiological point of view.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 28 (2005), S. 0 
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Nitrate is an important nitrogen source for plants, but also a signal molecule that controls various aspects of plant development. In the present study the role of nitrate on seed dormancy in Arabidopsis was investigated. The effects of either mutations affecting the Arabidopsis nitrate reductase genes or of different nitrate regimes of mother plants on the dormancy of the seeds produced were analysed. Altogether, data show that conditions favouring nitrate accumulation in mother plants and in seeds lead to a lower dormancy of seeds with little other morphological or biochemical differences. Analysis of germination during seed development indicated that nitrate does not prevent the onset of dormancy but rather its maintenance. The effect of an exogenous supply of nitrate on seed germination was tested: nitrate in contrast to glutamine or potassium chloride clearly stimulated the germination of dormant seeds. Data show, moreover, that the Arabidopsis dual affinity nitrate transporter NRT1.1 (CHL1) may be involved in conveying the nitrate signal into seeds. Thus, nitrate provided exogenously or by mother plants to the produced seeds, acts as a signal molecule favouring germination in Arabidopsis. This signalling may involve interaction with the abscisic acid or gibberellin pathway.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Science Ltd
    Addiction 98 (2003), S. 0 
    ISSN: 1360-0443
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin , Psychologie
    Notizen: Background  Social capital and a low severity of alcohol-related problems have been focused upon to explain the processes of natural recovery from alcohol dependence. However, studies using control groups have not found significant differences in these variables. Subtypes of natural remission which might account for this inconsistency have only been described on grounds of qualitative data.Aims  To identify subtypes of natural remitters using cluster analysis.Participants  One hundred and seventy-eight media-recruited natural remitters were interviewed personally. Several triggering mechanisms and maintenance factors of remission were assessed using standardized questionnaires. Based on age of onset and severity of dependence, adverse consequences from drinking, social pressure and social support, cluster analyses were performed.Results  Cluster analyses yielded three groups of natural remitters: one cluster with a high severity of dependence, low alcohol-related problems and low social support (‘low problems—low support’; n = 65), one group characterized by high severity of dependence, high alcohol-related problems and medium social support (‘high problems—medium support’; n = 37), and a third group which consisted of subjects with high social support, late age of onset, low severity of dependence, and low alcohol-related problems (‘low problems—high support’; n = 76). Cluster solutions were confirmed using discriminant analyses. Analyses of variance (ANOVAs) revealed further group differences on other triggering and maintaining factors of remission.Conclusions  Failure to identify specific pointers to natural recovery in previous research might be due to heterogeneous subgroups of natural remitters. In order to build a conceptual framework for understanding the processes of natural recovery, interactions of different independent variables should be considered.
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Oxford, UK : Carfax Publishing, Taylor & Francis Ltd
    Addiction 95 (2000), S. 0 
    ISSN: 1360-0443
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin , Psychologie
    Notizen: Abstract Aims. To assess the selection bias of recruiting participants in studies on natural recovery from alcohol dependence through media solicitation. Design. Two samples with different recruitment strategies are compared. Setting. Media solicitation and general population. Participants. Sample 1 consists of 176 alcohol-dependent individuals remitted without formal help and recruited through media solicatation, sample 2 consists of 32 natural remitters derived from a representative general population study with a sample size of 4075 respondents and a response rate of 70.2%. Measurements. Several triggering mechanisms and maintenance factors of remission were assessed in a personal interview using standardized questionnaires. Findings. Results of logistic regression analyses show that media-solicited subjects were more often abstinent in the last 12 months, were more severely dependent, were less satisfied with eight life domains prior to remission and showed higher scores in a coping behaviour measure. Besides these major differences from the multivariate analysis, media subjects revealed more health problems prior to remission, experienced more social pressure to change drinking behaviour, and showed differences in reasons for not seeking help. Conclusions. Media solicitation leads to a sample selection bias in research on natural recovery from alcohol dependence. When measures to foster self-change are derived from such studies, findings from representative samples have to be considered.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Oxford, UK : Carfax Publishing, part of the Taylor & Francis Group
    Addiction 96 (2001), S. 0 
    ISSN: 1360-0443
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin , Psychologie
    Notizen: 
 Aims. To analyse factors related to remission without formal help by using a representative sample and standardized instruments. 
Design. Two groups of untreated alcohol-dependent subjects were compared. 
Setting. General population survey. 
Participants. Thirty-two subjects fully remitted without formal help (NFH) and 26 current alcohol-dependent individuals (CAD) according to DSM-IV drawn from a representative general population sample in northern Germany (response rate: 70.2%, n = 4075). 
Measurements. Data focusing on the 2 years prior to remission from NFH were compared with past-year data from CAD. Groups were compared on variables found to be associated with remission without formal help in previous research. 
Findings. Logistic regression analysis revealed that individuals remitted from alcohol-dependence without formal help reported a higher non-physiological severity of alcohol dependence, less social pressure to quit drinking and more incidents of driving while intoxicated. Furthermore, they tended to report more satisfaction with work and financial situation and were more likely to live in a stable partnership. 
Conclusions. Findings support the concept of psychosocial resources as important enabling factors in remission from alcohol dependence without formal help. Implications for brief interventions are discussed.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of communication 52 (2002), S. 0 
    ISSN: 1460-2466
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medien- und Kommunikationswissenschaften, Kommunikationsdesign
    Notizen: This study explores Jewish American identity from a communication theory of identity perspective. We analyzed six episodes of the television show, Northern Exposure, for their representation of Jewish American identity. Next, the shows were edited into video segments reflecting the themes and shown to 26 Jewish Americans in order to elicit their perceptions of the communal expressions of Jewish identity. The study initially focuses on a communal representation of this group-based identity in order to understand how it is portrayed in collective consciousness. We then examine how this representation has interpenetrated the individual, interactional, and relational levels of identity.
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Science Ltd
    Journal of fish biology 62 (2003), S. 0 
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Based on results from simulated redds of coho salmon Oncorhynchus kisutch, the amount of fine sediment 〈0·5 mm in the lower half of the egg pocket, rather than the entire egg pocket of the redd, was a strong predictor of egg survival to hatching ( r2 = 0·62). The relationship was much stronger than observed in other studies, which typically ignore egg pocket structure. Abundance of a fish egg-eating worm, Haplotaxis ichthyophagous, an oligochaete that may have been attracted to fine sediment and dead eggs in the egg pocket, was also associated with a decrease in egg survival. The worm, however, accounted for little of the variance in survival compared to fine sediment. Only 10% fine sediment (〈0·5 mm) in the lower pocket was required to decrease survival from 100 to 5%. Other abiotic factors had weaker (gravel permeability) or non-existent (dissolved oxygen) correlations with survival.
    Materialart: Digitale Medien
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  • 10
    ISSN: 1741-2358
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: This paper summarises a series of studies already published in German and presents new data related to the aetiology of the dry mouth' and its associated problems.Aims: to study factors affecting mucous and serous salivary gland secretion, the aetiology of the ‘dry mouth’ and its associated problems, causative factors for hyposalivation and it's treatment Setting: two university dental hospitals.Subjects: 587 denture wearers and 521 control subjects, and autopsy material Interventions: exercise, chewing, water, oestrogen, pilocarpine, and anetholtrithion theiapy, biopsy of the minor glands Main outcome measures: Palatal secretion (PAL, μL/cm2/min) and parotid salivary flow (PAR), subjective complaints and clinical findings.Results: resting flow rates for PAL between 0 and 65 μl/cm2/min were seen in every age group. The flow rates of PAR (0 to 3.7 ml/10 min) were not correlated with PAL. Most patients with a resting flow rate of PAL≤6.0 μl/cm2 suffer from a ‘dry mouth’ and Burning Mouth Syndrome (BMS) or oral dysaesthesia (OD) with or without chronic lesions of the oral mucosa. Etiological factors for the incidence of reduced PAL and associated problems include xerostomic drugs, oestrogen deficiency, ladiotherapy, thyroid dysfunction, smoking or continuous wearing of complete upper dentures. PAL also correlated with the retention of upper complete dentures. PAL was correlated with the water content of epithelial tissues. PAL and PAR were both increased by drinking ample fluid, improving their circulation by physical exercises, chewing intensively, or taking oestrogens, pilocarpine, anetholtrithion.Conclusions: Variation in palatal salivary secretion occurs and is clinically important.
    Materialart: Digitale Medien
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