Publications by authors named "Heyden T"

We study the short-term market reactions of US and European stocks during the beginning of the COVID-19 pandemic. Employing an event study, we document that stocks react significantly negatively to the announcement of the first death in a given country. While our results suggest that the announcements of country-specific fiscal policy measures negatively affect stock returns, monetary policy measures have the potential to calm markets.

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Call centre workplaces are in many ways a challenge to occupational health and safety. The occupation itself can be described as an IT information technology-supported, communication-intensive form of work with often unusual working hours and a high rate of part-time employment. Data on the employee turnover as well as absenteeism related to occupational disability is quite contradictory.

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Human monocytes respond to LPS by releasing proinflammatory cytokines such as TNF-alpha, IL-1 and IL-6. Here we show that inhibitors of ADP-ribosylation namely nicotinamide and meta-iodobenzylguanidine prevent production of TNF-alpha and IL-6 at the protein and mRNA level. The inhibitors also influence the LPS-induced phosphorylation pattern of cytosolic proteins.

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A human autoimmune serum is used to characterize a protein which is located within a dot-like structure of the interphase nucleus. The dots are located in the nucleoplasma outside the nucleoli. The dot-like structure could be observed on a variety of human substrates (HEp-2, HepG2, HeLa, Molt-4, WI-38 cell lines, peripheral blood lymphocytes), mouse cell lines and tissues (3T3, L929, spleen sections), rat sections, marsupial PtK2 cells and hamster cell lines.

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Unlabelled: The present study focuses on the differential efficiency of specific psychological and medical procedures for the treatment of chronic sleep disorders (primary symptoms). 32 selected subjects with chronic sleep disorders were assigned to one of the following groups according to their own choice: cognitive change and relaxation training (n = 12), needle acupuncture (n = 8), laser acupuncture (n = 12), and a waiting control group (n = 12). Before, during, and after the respective therapy each subject kept a record with 13 items about his/her sleeping behaviour which had to be filled out every morning.

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Six schizophrenic patients received propranolol hydrochloride to evaluate pharmacological, endocrinological, and antipsychotic properties of the drug. They had previously been unsuccessfully treated with phenothiazines. After a drug-free period of two weeks, propranolol was administered in gradually increasing doses.

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Conflicting reports on the association between platelet MAO activity and schizophrenia prompted a critical review and determinations on identical samples at one laboratory in Sweden and one in the U.S.A.

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Using a newly characterized anti-melatonin serum it has been possible to establish human serum melatonin concentrations at short time intervals during 24h. A clear circadian rhythm with peak values during the dark phase was demonstrated in both men and women. Values (pg/ml;mean +/- SE) were as follows: females 02.

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Serum melatonin concentration in early morning during the menstrual cycle, studied in five healthy women, showed that melatonin was elevated at the time of menstrual bleeding and had its nadir at the time of the menstrual cycling in humans.

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