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  • 1
    Signatur: S 02.0465(12)
    In: Cahiers du Centre Européen de Géodynamique et de Séismologie
    Materialart: Schriftenreihen ausleihbar
    Seiten: XVIII, 304 S.
    ISBN: 2879770440
    Serie: Cahiers du Centre Europeen de Geodynamique et de Seismologie 12
    Standort: Kompaktmagazin unten
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2021-02-19
    Beschreibung: Dimethyl fumarate is a cytoprotective and immunomodulatory drug used in the treatment of multiple sclerosis. We performed a bibliometric study examining the characteristics and trends of the top 100 cited articles that include dimethyl fumarate in the title. On 21 September 2020 we carried out an electronic search in the Web of Science (WOS), seeking articles that include the following terms within the title: dimethyl fumarate, BG-12, or Tecfidera. To focus our investigation on original research, we refined the search to include only articles, early access, others, case report, and clinical trials. We obtained a total of 1115 items, which were cited 7169 times, had a citation density of 6.43 citations/item, and an h-index of 40. Around 2010, there was a jump in the number of published articles per year, rising from 5 articles/year up to 12 articles/year. We sorted all the items by the number of citations and selected the top 100 most cited (T100). The T100 had 4164 citations, with a density of 37 citations/year and contained 16 classic research articles. They were published between 1961 and 2018; the years 2010–2018 amassed nearly 80% of the T100. We noted 17 research areas with articles in the T100. Of these, the number one ranking went to neurosciences/neurology with 39 articles, and chemistry ranked second on the T100 list with 14 items. We noticed that the percentage of articles belonging to different journals changed depending on the time period. Chemistry held the highest number of papers during 1961–2000, while pharmacology andneurosciences/neurology led the 2001–2018 interval. A total of 478 authors from 145 institutions and 25 countries were included in the T100 ranking. The paper by Gold R et al. was the most successful with 14 articles, 1.823 citations and a density of 140.23 citations/year. The biotechnological company Biogen led the T100 list with 20 articles. With 59 published articles, the USA was the leading country in publications. We concluded that this study analyzed the use of and research on dimethyl fumarate from a different perspective, which will allow the readership (expert or not) to understand the relevance of classic and recent literature on this topic.
    Digitale ISSN: 1420-3049
    Thema: Chemie und Pharmazie
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2021-08-01
    Beschreibung: Purpose: to characterize the distribution and mechanisms involved in ceftolozane/tazobactam (C/T) resistance in Pseudomonas aeruginosa isolates recovered from intensive care units (ICUs) in Portugal as part of the STEP surveillance study. Materials and methods: a total of 226 P. aeruginosa isolates were collected from patients with low respiratory tract infections (LRTI) admitted to ICUs between June 2017 and July 2018. Susceptibility to antimicrobials including the recent C/T combination was determined by EUCAST-criteria. Whole genome sequencing (WGS) was performed in a subset of 17 isolates. Results: multidrug resistant (MDR) and extremely drug resistant (XDR) phenotypes accounted for 20.4% and 25.7% of cases, respectively. C/T showed the highest susceptibility rate in both MDR (100%) and XDR (93.1%) isolates, followed by amikacin (97.8% MDR and 79.3% XDR). blaKPC-3 (n = 2) and blaGES-13 (n = 1) carbapenemase genes were detected in 3 of the 17 sequenced isolates, but only the GES-13-producing isolate displayed resistance to C/T. Additionally, the C/T-resistant phenotype was also found in two non-carbapenemase producers that carried known ceftolozane/tazobactam resistance-associated mutations in the PBP3 gene. Conclusions: C/T was highly active against MDR/XDR-P. aeruginosa isolates causing LRTI in ICUs. Moreover, beyond carbapenemase-encoding genes, mutations in chromosomal PBP-encoding genes might also be involved in ceftolozane/tazobactam resistance in Portugal.
    Print ISSN: 0378-1097
    Digitale ISSN: 1574-6968
    Thema: Biologie
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    ISSN: 1520-6041
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Macromolecules 23 (1990), S. 2057-2061 
    ISSN: 1520-5835
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Biology and fertility of soils 30 (1999), S. 140-146 
    ISSN: 1432-0789
    Schlagwort(e): Key words Soil quality indicators ; Soil biochemical properties ; Soil degradation ; Soil pollution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract  The native soils of Galicia (NW Spain) exhibit a biochemical equilibrium such that total soil N is a function of five biochemical and microbiological parameters: microbial biomass C, mineralized N, phosphomonoesterase, β-glucosidase and urease activities. To investigate whether the ratio of the total N calculated from biochemical soil properties (Nc) and the total N as measured by the Kjeldahl method (Nk; Nc/Nk) can be used as an index of soil quality, we determined these variables and consequently the ratio in three kinds of disturbed soils: an artificially Cu-contaminated soil, two lignite mine soils, and a number of arable soils. In none of the studied soils did the individual biochemical parameters respond consistently to the factors influencing soil quality, but in all cases soil degradation was reflected by the Nc/Nk value, which differed more or less markedly from 100%. Nc/Nk can therefore be used for the rapid evaluation of soil degradation, since it distinguishes among biochemically balanced soils, soils in a transient state of high microbiological and biochemical activity and degraded soils. It can also serve as a reliable basis for the rapid calculation of the "ecological dose" (ED50) of soil pollutants. The use of Nc/Nk as an objective index of the biochemical quality of soils is recommended.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Bulletin of environmental contamination and toxicology 61 (1998), S. 730-737 
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Il nuovo cimento della Società Italiana di Fisica 7 (1986), S. 322-326 
    ISSN: 0392-6737
    Schlagwort(e): Molecular photon processes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Beschreibung / Inhaltsverzeichnis: Riassunto Sulle basi del modello quantostatistico recentemente discusso, in questo lavoro si trattano le perturbazioni indotte dall'intenso campo di un laser a CO2 sui livelli del percorso vibrazionale di una molecola sottoposta a dissociazione unimolecolare multifotonica. Questa correzione perturbazionale è studiata usando una tecnica con operatori di dislocazione e i risultati sono interpretati secondo il modello statistico.
    Notizen: Summary On the basis of a quantum-statistical model recently discussed, we deal in this paper with the perturbations induced by the intense field of a CO2 laser on the levels of the vibrational pattern of a molecule undergoing multiphoton unimolecular dissociation. This perturbational correction is investigated by using a displacement operator technique and the results are interpreted according to the statistical model.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Il nuovo cimento della Società Italiana di Fisica 9 (1987), S. 431-445 
    ISSN: 0392-6737
    Schlagwort(e): Molecular photon processes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Beschreibung / Inhaltsverzeichnis: Riassunto È stato studiato il quasi-continuo vibrazionale della molecola del trifluoruro di boro e il formalismo è stato esteso per trattare molecola conN modi normali. Sono state calcolate le curve anarmoniche del potenziale per i modi normali di BF3 e sono state provate le costanti di anarmonicità calcolate rispetto alle frequenze fondamentali. La curva del potenziale del modo di scuotimento è stata simulata mediante una rotazione interna di uno degli atomi del fluoruro. Sono stati calcolati i livelli di energia vibrazionale e le funzioni d'onda, applicando la teoria di perturbazione di secondo ordine. Sono stati ottenuti i livelli di energia quasi continua del BF3 mediante un metodo basato sulla formazione di adeguate combinazioni lineari di funzione d'onda che appartengono ai modiN-1 che risultano rimuovendo il modo i.r. attivo; le energie associate sono state minimizzate usando una procedura di minimizzazione vincolata. Si è trovato che il modello di energia degliN-1 modi vibrazionali una densità di energia alta abbastanza per costituire un bagno vibrazionale di calore e, infine, si è verificato che il modello «fittizio» del modo attivo è incluso nel modello degliN-1 modi.
    Kurzfassung: Резюме Качественно исследуются колебательньій квазиконтиуум молекульі BF3 и предлагается обобщенньій формализм для рассмотрения молекул сN-нормальньіми модами. Вьічисляются потенциальньіе кривьіе для нормальньіх мод BF3. Вьічисленньіе константьі ангармоничности проверяются на фундаментальньіх частотах. Потенциальная кривая для модьі моделируется с помощью внутреннего вращения одного из атомов фтора. Вьічисляются уровни знергии колебательного движения и волновьіе функции, используя теорию возмущений второго порядка. Уровни энергии квазиконтинуума BF3 получаются с помощью метода, основанного на образовании адекватньіх линейньіх комбинаций волновьіх функций, принадлежащихN-1, модам, которьіе возникают при удалении инфракрасной активной модьі. Ассоциированньіе энергии минимизируются, используя ограниченную процедуру минимизации. Получено, что спектр энергии дляN-1 колебательной модьі обладает достаточно вьісокой плотностью для образования колебательной тепловой бани. В заключение, проверяется, что «фиктивньій» спектр активной модьі включается в спектр дляN-1 модьі.
    Notizen: Summary The vibrational quasi-continuum of the boron trifluoride molecule has been qualitatively studied and the formalism extended to treatN-normal-mode molecules. The anharmonic potential curves for the BF3 normal modes have been calculated, and the computed anharmonicity constants have been tested against the fundamental frequencies. The potential curve of the wagging mode has been simulated by an internal rotation of one of the fluoride atoms. The vibrational-energy levels and wave functions have been calculated applying second-order perturbation theory. The quasi-continuum energy levels of BF3 have been obtained by means of a method based in forming adequate linear combinations of wave functions belonging to theN-1 modes resulting from removing the i.r.-active mode; the associated energies have been minimized using a constrained minimization procedure. It has been found that the energy pattern of theN-1 vibrational modes possesses an energy density high enough for constituting a vibrational heat bath and, finally, it has been verified that the «fictitious» pattern of the active mode is included in the pattern of theN-1 modes.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: : Contamination levels (cfu/g and cfu/cm2) of indicator microorganisms in retail broiler chicken carcasses in León (Spain) were investigated. Counts (log10 cfu/g) were 5.19, 3.04, 2.73, 3.38, and 3.16 for total aerobic counts (TAC), Enterobacteriaceae, coliforms determined by the standard VRBA method (coliforms-VRBA), coliforms determined by the Hydrophobic Grid Membrane Filter method (coliforms-HGMF), and Escherichia coli (HGMF method), respectively. These values fit into the microbiological criteria for poultry meat consulted. A low correlation coefficient was found between TAC and Enterobacteriaceae counts (r = 0.308; P = 0.053) and between coliforms-VRBA and coliforms-HGMF counts (r = 0.398; P= 0.048). The determination method had a significant influence on the coliform counts obtained. All broiler chicken carcasses harbored E. coli biotype I. E. coli biotype II was detected in 20% of the samples. The HGMF method was not completely specific for detecting E. coli since 11.25% of false positive colonies were found.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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