Història del producte bibliogràfic: dues aproximacions contrastades

Abans d'iniciar pròpiament el tema de la ponència, voldríem fer un breu comentari sobre els motius que ens han animat a participar en aquest congrés. Es podria dir, succintament, que el principal propòsit ha estat oferir tant als participants en el Congrés com als futurs lectors dels textos que es puguin derivar d'aquest, un àmbit de reflexió i, si s'escau, de debat, presentat des d'una disciplina forana a la història moderna: el disseny.1 I és concretament el disseny gràfic el que donarà l'orientació als nostres continguts i un tractament específic al material de l'exposició, sempre amb la finalitat de recalcar que hi ha aspectes de la història que des de plantejaments multidisciplinaris poden esdevenir possibles i interessants camps de recerca interdisciplinaris. L'objecte últim és, doncs, obrir camins de col·laboració entre dues disciplines: la història, que ja gaudeix d'una llarga tradició quant a producció de coneixement, i el disseny, que tot just despunta com a disciplina universitària

Història del producte bibliogràfic: dues aproximacions contrastades

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Història del producte bibliogràfic: dues aproximacions contrastades

Abans d'iniciar pròpiament el tema de la ponència, voldríem fer un breu comentari sobre els motius que ens han animat a participar en aquest congrés. Es podria dir, succintament, que el principal propòsit ha estat oferir tant als participants en el Congrés com als futurs lectors dels textos que es puguin derivar d'aquest, un àmbit de reflexió i, si s'escau, de debat, presentat des d'una disciplina forana a la història moderna: el disseny.1 I és concretament el disseny gràfic el que donarà l'orientació als nostres continguts i un tractament específic al material de l'exposició, sempre amb la finalitat de recalcar que hi ha aspectes de la història que des de plantejaments multidisciplinaris poden esdevenir possibles i interessants camps de recerca interdisciplinaris. L'objecte últim és, doncs, obrir camins de col·laboració entre dues disciplines: la història, que ja gaudeix d'una llarga tradició quant a producció de coneixement, i el disseny, que tot just despunta com a disciplina universitària

Charge Transfer States in Stable Neutral and Oxidized Radical Adducts from Carbazole Derivatives

[EN] In this paper we report the spectral properties of the stable radical adducts 1•–3•, which are formed by an electron donor moiety, the carbazole ring, and an electron acceptor moiety, the polychlorotriphenylmethyl radical. The molecular structure of radical adduct 1• in the crystalline state shows a torsion angle of approximately 90° between the phenyl and the carbazole rings due to steric interactions. They exhibit a charge transfer band in the visible range of the electronic spectrum. All of them are chemically oxidized with copper(II) perchlorate to the respective cation species, which show a strong charge transfer band into the near-infrared region of the spectrum. Radical adducts 1•–3• and the corresponding stable oxidized species 1+–3+ are real organic mixed-valence compounds due to the open-shell nature of their electronic structure. Charge transfer bands of the cation species are stronger and are bathochromically shifted with respect to those of the neutral species due to the greater acceptor ability of the positively charged central carbon atom of the triphenylmethyl moiety. The cationic species 1+–3+ are diamagnetic, as shown by the absence of a signal in the EPR spectrum in acetonitrile solution at room temperature, but they show an intense and unique band in frozen solutionsFinancial support for this research from the MCI (Spain) through project CTQ2012-36074 is gratefully acknowledged. We also thank the EPR service of the Advanced Research Institute of Catalunya (CSIC) (Spain) for recording the EPR spectra and the ESRF for beamtime allocation at ID31. O.V. also thanks Consolider NANOSELECT CSD2007-00041 for a contract.Fajarí, L.; Papoular, R.; Reig, M.; Brillas, E.; Jorda Moret, JL.; Vallcorba, O.; Rius, J.... (2014). Charge Transfer States in Stable Neutral and Oxidized Radical Adducts from Carbazole Derivatives. Journal of Organic Chemistry. 79(4):1771-1777. doi:10.1021/jo4028215S1771177779

Management practices for postdural puncture headache in obstetrics: a prospective, international, cohort study

© 2020 British Journal of AnaesthesiaBackground: Accidental dural puncture is an uncommon complication of epidural analgesia and can cause postdural puncture headache (PDPH). We aimed to describe management practices and outcomes after PDPH treated by epidural blood patch (EBP) or no EBP. Methods: Following ethics committee approval, patients who developed PDPH after accidental dural puncture were recruited from participating countries and divided into two groups, those receiving EBP or no EBP. Data registered included patient and procedure characteristics, headache symptoms and intensity, management practices, and complications. Follow-up was at 3 months. Results: A total of 1001 patients from 24 countries were included, of which 647 (64.6%) received an EBP and 354 (35.4%) did not receive an EBP (no-EBP). Higher initial headache intensity was associated with greater use of EBP, odds ratio 1.29 (95% confidence interval 1.19–1.41) per pain intensity unit increase. Headache intensity declined sharply at 4 h after EBP and 127 (19.3%) patients received a second EBP. On average, no or mild headache (numeric rating score≤3) was observed 7 days after diagnosis. Intracranial bleeding was diagnosed in three patients (0.46%), and backache, headache, and analgesic use were more common at 3 months in the EBP group. Conclusions: Management practices vary between countries, but EBP was more often used in patients with greater initial headache intensity. EBP reduced headache intensity quickly, but about 20% of patients needed a second EBP. After 7 days, most patients had no or mild headache. Backache, headache, and analgesic use were more common at 3 months in patients receiving an EBP

Management practices for postdural puncture headache in obstetrics : a prospective, international, cohort study

Background: Accidental dural puncture is an uncommon complication of epidural analgesia and can cause postdural puncture headache (PDPH). We aimed to describe management practices and outcomes after PDPH treated by epidural blood patch (EBP) or no EBP. Methods: Following ethics committee approval, patients who developed PDPH after accidental dural puncture were recruited from participating countries and divided into two groups, those receiving EBP or no EBP. Data registered included patient and procedure characteristics, headache symptoms and intensity, management practices, and complications. Follow-up was at 3 months. Results: A total of 1001 patients from 24 countries were included, of which 647 (64.6%) received an EBP and 354 (35.4%) did not receive an EBP (no-EBP). Higher initial headache intensity was associated with greater use of EBP, odds ratio 1.29 (95% confidence interval 1.19-1.41) per pain intensity unit increase. Headache intensity declined sharply at 4 h after EBP and 127 (19.3%) patients received a second EBP. On average, no or mild headache (numeric rating score <= 3) was observed 7 days after diagnosis. Intracranial bleeding was diagnosed in three patients (0.46%), and backache, headache, and analgesic use were more common at 3 months in the EBP group. Conclusions: Management practices vary between countries, but EBP was more often used in patients with greater initial headache intensity. EBP reduced headache intensity quickly, but about 20% of patients needed a second EBP. After 7 days, most patients had no or mild headache. Backache, headache, and analgesic use were more common at 3 months in patients receiving an EBP