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  • 2005-2009  (797)
  • 1975-1979  (141)
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  • 1
    Series available for loan
    Series available for loan
    Leiden : Rijksmuseum van Geologie en Mineralogie
    Associated volumes
    Call number: SR 93.0422(39)
    In: Scripta geologica
    Type of Medium: Series available for loan
    Pages: 67 S.
    Series Statement: Scripta geologica 39
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The authors describe a new technique for isolation of specific fractions of synaptosomes, on the basis of their surface glycoproteins, by affinity chromatography using lectin-Sepharose columns.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2007
    Keywords: TF IV ; Task Force IV ; Ultra-Deep Continental Crust Subduction (UDCCS)
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  • 4
    ISSN: 1066-2243
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Computer Science
    Notes: Purpose - First, to theoretically justify and empirically test the sequence of effects based on the standard learning hierarchy to explain consumers' online buying-related responses. Second, to analyse the moderating role that consumers' internet expertise can play on the formation of both their affective and buying-related responses towards this medium. Design/methodology/approach - This study poses a conceptual model which is tested by means of LISREL. The data used come from a questionnaire applied to American and Spanish internet users. These two countries have been selected taking into account their differences regarding their degree of internet expertise. Findings - The modelling approach appears to be adequate to explain online consumer behaviour. Moreover, different levels of consumers' internet expertise determines, in general, the predominance of the central or the peripheral route within the formation of their affective and behavioural responses to this medium. Research limitations/implications - This study provides a relevant contribution to the field of consumer behaviour on the internet. It presents an extensive literature review; it introduces new concepts and new relations among them; it successfully adapts classic consumer theories, i.e. the CAB paradigm and the Elaboration Likelihood Model - to the electronic market context; and it has a cross-national vision. Practical implications - It shows how any virtual firm which endeavours to understand consumers' shopping behaviour in its web site should consider these general issues in conjunction with the rest of the specific factors and variables related to it. Originality/value - This is one of the first studies which, on the one hand, theoretically integrates in a model the following concepts: beliefs and attitude towards the internet, trust in internet shopping and online shopping, and on the other, demonstrates that the degree of internet expertise plays an essential role in determining how consumers process and form their affective and buying-related responses on the internet.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0268-3946
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Psychology , Economics
    Notes: Purpose - To analyse the influence of three different types of organisational support (supervisor's and colleagues' support, training, and acknowledgement and rewards) on the implementation of teamwork systems. Design/methodology/approach - Main and buffer effects of social support were tested using different subjective (job satisfaction and job involvement) and objective (production and total production management (TPM)) organisational criteria. In the longitudinal study, two sets of data were taken from a sample of workers from car-manufacturing factories in two consecutive years. Findings - The three dimensions of support explain 30 per cent of the variance in job satisfaction in time 1(T1) and 11 per cent in time 2 (T2). A total of 50 per cent of job involvement in T1 is due to the supervisor's and colleagues' support, whereas in T2 this influence is not apparent. Social support from supervisor's and colleagues and acknowledgment and rewards explain 10 per cent of the variance of the objective measures (production and TPM). Research limitations/implications - The objective measures used are similar for the production line as a whole and therefore they do not consider the possible differences in performance between different production line groups. Practical implications - The importance of social support in organisational settings, in particular in the implementation of working teams. It also emphasises the need to distinguish the different stages of support from colleagues, supervisors or the organisation. Originality/value - This study indicates that support is an easy and inexpensive means not only to improve the social environment of an employee but also to make an important contribution towards productivity targets.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 2018-03-01
    Description: Multichannel seismic reflection images across the transition between the east Alborán and the Algero-Balearic basins show how crustal thickness decreases from about 5 s two-way traveltime (TWTT, ∼15 km thick) in the west (east Alborán basin) to ∼2 s TWTT typical of oceanic crust (∼6 km thick) in the east (Algero-Balearic basin). We have differentiated three different crustal domains in this transition, mainly on the basis of crustal thickness and seismic signature. Boundaries between the three crustal domains are transitional and lack evidence for major faults. Tilted blocks related to extension are very scarce and all sampled basement outcrops are volcanic, suggesting a strong relationship between magmatism and crustal structure. Stratigraphic correlation of lithoseismic units with sedimentary units of southeastern Betic basins indicates that sediments onlap igneous basement approximately at 12 Ma in the eastern area and at 8 Ma in the western area. Linking seismic crustal structure with magmatic geochemical evidence suggests that the three differentiated crustal domains may represent, from west to east, thin continental crust modified by arc magmatism, magmatic-arc crust, and oceanic crust. Middle to late Miocene arc and oceanic crust formation in the east Alborán and Algero-Balearic basins, respectively, occurred during westward migration of the Gibraltar accretionary wedge and shortening in the Betic-Rif foreland basins. Arc magmatism and associated backarc oceanic crust formation were related to early to middle Miocene subduction and rollback of the Flysch Trough oceanic basement. Subduction of this narrow slab beneath the Alborán basin was coeval with collision of the Alborán domain with the Iberian and African passive margins and subsequent subcontinental-lithosphere edge delamination along the Betic-Rif margins.
    Type: Article , PeerReviewed
    Format: text
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  • 7
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 34 (1978), S. 1381-1383 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Resumen A partir de una cepa de Conidiobolus coronatus aislada de Aenolamia postica, se inocularon 152 ratones, 42 cobayos y 47 hamsters por vías intraperitoneal (IP), subcutánea (SC), intratraqueal y por escarificación en la mucosa oral; cada animal se inoculó 3 veces a intervalos de una semana. Los animales se sacrificaron a los 1, 8, 15, 45 y 225 días de la primera inoculación, haciéndose estudios de alteraciones macroscópicas (nódulos, abscesos, adherencias), exámenes directos, cultivos e histopatología. Las alteraciones macroscópicas de los tejidos fueron las más frecuentes y todas evolucionaron a la curación espontánea. Los animales presentaron un mayor múmero de estudios positivos cuando se inocularon por vía IP y SC. Los estudios histopatológicos hechos al 1° y 8° día, demostraron un infiltrado inflamatorio agudo y filamentos fúngicos bien conservados; a los 15 días se observaron granulomas con células gigantes y filamentos fragmentados en desintegración; a los 45 y 225 días se observó una reacción de fibrosis sin filamentos fúngicos. Se consideró que en ningún caso se logró reproducir la rinoentomoftoromicosis y de acuerdo a éstos resultados se estima que esta cepa no tiene patogenicidad o bien ésta es muy baja.
    Notes: Abstract The pathogenicity of a strain of Conidiobolus coronatus isolated from Aenolamia postica was investigated in 152 mice, 42 guinea pigs and 47 hamsters. Four routes of inoculation were used: intraperitoneal, subcutaneous, intratracheal and scarification in the oral mucosa. Each animal was inoculated 3 times at 3 week intervals. Animals were sacrificed at 1, 8, 15, 45 of 225 days after the first inoculation. Observations of macroscopic lesions (nodules, abscesses, adhesions, etc.) direct examinations, cultures and histopathological studies of different tissues were performed. The aforementioned lesions of tissue were the most frequently found and all of them were resolved by spontaneous cure. The animals inoculated intraperitoneally and subcutaneouslly presented the highest number of positive results. The histopathological features at the 1st and 8th days after inoculation showed an acute inflamatory infiltrate with well preserved fungus filaments; at the 15th day granulomas with giant cells were observed containing fragmented and disintegrated fungal hyphae; at the 45th and 225th days a fibrosis reaction was observed and no fungal filaments, could be found. In no animal was rhinoentomophthoromycosis never reproduced, and according to these results it is considered that either this strain is not a pathogen or its pathogenicity is very low.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A kaolin obtained from a region near to San Luis Potosí (México) was characterizedby X-ray powder diffraction (DRX), optical microscopy (OM), scanning electron microscopy(SEM), X-ray fluorescence (XRF), thermal analysis (DTA/TGA), and chemical analysis.Mineralogical and morphological characteristics of the mineral are presented. The kaolin samplewas formed mainly by kaolinite, but other minor phases were also detected such as quartz,cristobalite, trydimite, and dolomite. For iron lixiviation process, concentrate HCl wasemployed. The high content of volcanic glass detected, evidenced by optical microscopy,revealed an incomplete kaolinization process of the raw material. In agreement with theseresults, X-ray fluorescence analysis showed high- SiO2 and low-Al2O3 content in the sample as isexpected on weakly kaolinized materials
    Type of Medium: Electronic Resource
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