Preadvies van Prof. Dr. H. W. J. Bosman

Bosman, H. W. J.; Derksen, J. B. D.; Hessel, W.

doi:10.1007/978-94-015-1080-6_1

Cited by 15 publications

(21 citation statements)

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“…In addition, melatonin reduces norepinephrine and epinephrine content in adrenal gland [21]. Administration of melatonin in vivo determined a reduction of heart rate in baboon [22] and both arterial pressure and heart rate in rats [13] as the result of a hypothetical sympathetic inhibition. In fact, melatonin has been proposed as endogenous hypotensive factor probably by stimulating central inhibitory adrenergic pathways [23].…”

Section: Discussionmentioning

confidence: 95%

Effects of melatonin in isolated rat papillary muscle

et al. 1997

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Melatonin (A r -acetyl-5-methoxytryptamine), the principal hormone of the vertebral pineal gland, elicits several neurobiological effects. However, the effects of melatonin on cardiac muscle are still unknown. The first goal of the study was to investigate the role of melatonin on myocardial contractility in isolated rat papillary muscle using dose-response curves to melatonin, to isoproterenol and calcium either in the presence or in the absence of melatonin (0.3 nM). Response curves to isoproterenol were additionally performed in the presence of melatonin plus the specific receptor antagonist 7V-acetyltryptamine (10 uM); the adenylate-cyclase stimulator forskolin (10 uM) was also used. Melatonin has no direct inotropic effect in isolated rat papillary muscle but counteracts isoproterenol but not [Ca 2+ ] effects. In fact, the EC50 for isoproterenol was significantly higher in the presence than in the absence of melatonin (p < 0.001). This antiadrenergic action occurs through an interaction to a specific cardiac receptor. Forskolin-stimulated adenylate cyclase induced an increase of contractile force (+118 ± 25%) which was reduced in the presence of melatonin (+26 ± 10%; p < 0.01).In conclusion, we found that melatonin possess anti-adrenergic effect in isolated rat papillary muscle. This phenomenon was abolished in the presence of its receptor antagonist TV-acetyltryptamine demonstrating that melatonin operates through a specific cardiac receptor. The reduction of contractility increase, induced by forskolin-stimulated adenylate cyclase, shows that melatonin may act through a reduction of cyclic AMP accumulation.© 1997 Federation of European Biochemical Societies.

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Section: Discussionmentioning

confidence: 95%

Effects of melatonin in isolated rat papillary muscle

et al. 1997

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“…The SCI database was chosen because for over 40 years it has been the only database that provided productivity and citation data for journals considered to be of some influence, which are most likely to be cited as well as reflect the international scientific activity in a field. [13][14][15] Moreover, 1467 of 8901 journal titles indexed in Web of Science are not covered by SCOPUS. 16 Objectives Among other indicators, the number of papers produced by a scientist from a given institution is a measure of both his productivity as well as his institution's publication output.…”

Section: Introductionmentioning

confidence: 99%

Biomedical and health sciences publication productivity from Malaysia

Zainal

Zainab

2011

Health Info Libraries J

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Background: The aim of this study was to examine Malaysian contributions in the field of biomedical and health sciences. Methods: In this study, 3697 publications affiliated to Malaysian addresses from the SCI database between 1990 and 2005 were sampled. This study also explored publication productivity trends, authorship and collaboration pattern, core journals used, and citations obtained. Results: Main contributions were journal articles (73.3%). Most authors (63.7%) contributed only one article and 16.1% produced over 30-68 publications. Multi-authored works were the norm. The productive authors were named either first or second in publications. There were active collaborations with authors from Asia-Pacific countries (35%) and Europe (30%). The majority of publications were contributed by institutions of higher learning (87%). Core journals used follow quite close to Bradford's zonal ratios of 44:152:581. The active research areas were identified. About 71.3% of publications received citations especially those published from 1995 to 1999. Conclusion: This study helped librarians identify active researchers, active research areas and journals relevant to biomedical and health sciences researchers and useful when producing reports to university management and planning medical collection policies and deciding on journal subscriptions and cancellations.

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“…On the other hand the electron-phonon interaction is not sufficiently strong to localize the conduction electron corresponding to the "small polaron" model. Unfortunately this transition regime of the medium polaron, which may also be significant for other transition metal compounds like NiO, TiO,, and BaTiO,, is not well understood a t present [6].…”

Section: Introductionmentioning

confidence: 84%

Thermal conductivity of semiconducting and metallic FeSi2

Waldecker¹,

Meinhold²,

Birkholz³

1973

Phys. Stat. Sol. (a)

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The thermal conductivity of β‐ and α‐FeSi2 has been investigated at low temperatures (2 K < T < 90 K) and between room temperature and the transition temperature (1200 K). For undoped β‐FeSi2 results are obtained, which are typical for pure crystals. Doping with Co and Al reduces the lattice thermal conductivity. A band gap (T = 0 K) of 0.9 eV can be calculated from the ambipolar range. The lattice thermal conductivity of α‐FeSi2 is determined by a high concentration of Fe‐vacancies.

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Preadvies van Prof. Dr. H. W. J. Bosman

Cited by 15 publications

References 0 publications

Effects of melatonin in isolated rat papillary muscle

Effects of melatonin in isolated rat papillary muscle

Biomedical and health sciences publication productivity from Malaysia

Thermal conductivity of semiconducting and metallic FeSi2

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