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Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)On the basis of new experimental data of tritanopic vision the convergence centre for tritanopia has been redetermined, and has turned out to bex' = 0.1747,y' = 0.0060 in the Judd 1951-chromaticity diagram. A consequence of this determination is that the blue system is more sensitive than was concluded from the Thomson-Wright (1953) study. The...article 1974
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Germans, F.H. (author), Koster, M.W. (author), Kwee, H.H. (author), Groep Motoriek Revalidatie, Medisch Fysisch Instituut TNO Instituut voor gezondheidstechniek TNO (author)The merits of the 'vacuum form fixation' are discussed for the production of reliable body impressions of patients suffering from sitting problems. Impressions are taken with the patients seated in the desired posture. The first results are reported, obtained from 4 patients of different categories, fitted with individually moulded seats...article 1974
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Zeedijk, H.B. (author), Metaalinstituut TNO (author)Asbestos bodies and asbestos fibers were found in the lungs of a mesothelioma patient and analysed by electron microscopy. The bodies were normal asbestos bodies with amphibole-asbestos fibers as kernels. The free asbestos fibers, present in the lungs, mainly were chrysotile-asbestos. © 1973 Springer-Verlag. Chemicals/CAS: asbestos, 1332-21-4;...article 1973
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Bouman, M.A. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)On the basis of measurements of the achromatic zone for red light in the fovea and for green light in the periphery, a discussion is given on the possible difference in threshold mechanisms for the achromatic (scotopic) and chromatic (photopic) retinal systems. A specific suggestion for this distinction is given that not directly refers to the...article 1972
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Bunt, A.A. (author), Sanders, A.F. (author)An experiment is reported on the effects of cognitive similarity on proactive and retroactive interference (PI, RI) in short term memory. To avoid confounding between cognitive and acoustic similarity, the materials - i.e. words and digits - were matched with respect to vowel pattern. Effects of both PI and RI were found on recall of words,...article 1972
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Vos, J.J. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)To derive the fundamental response curves for the three colour mediating systems from the location of the dichromatic confusion centres, one must make certain assumptions on the nature of dichromatism. It is shown, however, that one can avoid to make specific quantitative assumptions by bringing into the picture other visual data, such as the...article 1971
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Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author), Danev, S.G. (author), de Winter, C.R. (author)In an eight-choice reaction task, the influence of erroneous responses upon the temporary changes in the level of heart rate (HR) was studied. It was shown that after errors there was a short-term deceleration of the HR-level, while after correct responses an accelerating tendency was found. This phenomenon has to be regarded as an additional...article 1971
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Medisch Biologisch Labortorium TNO (author), Kleijer, W.J. (author), Lohman, P.H.M. (author), Mulder, M.P. (author), Bootsma, D. (author)Repair replication and rejoining of single-strand breaks after X-irradiation in human-skin fibroblasts from normal donors and several patients with xeroderma pigmentosum have been compared. The xeroderma strains showed different levels of repair replication following UV exposure. Repair replication and rejoining of breaks, which are considered...article 1970
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Centraal Instituut voor Voedingsonderzoek TNO (author), Janbroers, J.M. (author), Sanders, J.C. (author), Til, H.P. (author), Feron, V.J. (author), de Groot, A.P. (author)Studies in rats on iocetamic acid show that the LD50 levels of this compound compare favorably with those of a number of other oral cholecystographic agents. Pathologic effects are not found in rats and cats in studies of the subacute toxicity. Incompatibility with an anesthetic or a tranquilizer is not found. The elimination pattern of...article 1969
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- Medisch Fysisch Instituut TNO (author), van der Weide, H. (author), van Bemmel, J.H. (author) article 1968
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Bleichrodt, J.F. (author), van Abkoude, E.R. (author), Medisch Biologisch Laboratorium TNO (author)If cells of the bacterium Escherichia coliC infected with bacteriophage φX174 are lysed artificially in the cold, the phage obtained is relatively heat resistant at temperatures around 65° and unable to adsorb to host cells at 4°. At 37° the phage particles become more thermolabile with respect to inactivation at 65° and, concomitantly, obtain...article 1967
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Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)THE Stiles–Crawford effect1,2, or the dependence of luminous efficiency on the eccentricity of the point of entry of the light in the pupil, is a function of the wavelength of the light. In Fig. 1 is given the inverse 1/ of the luminous efficiency as a function of wave-length at a distance of 3.5 mm from the point of maximum efficiency,...article 1966
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Medisch Biologisch Labortorium TNO (author), Galavazi, G. (author), Bootsma, D. (author)Some aspects of the population dynamics before, during and after the double thymidine treatment synchronization procedure were analysed. The mitotic index in the synchronized populations rose from 0.0 per cent at 1 hr after the end of the second treatment to 20.8 per cent at 9.7 hr, dropped to 0.1 per cent at about 22 hr and increased again to a...article 1966
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Medisch Biologisch Labortorium TNO (author), Galavazi, G. (author), Schenk, H. (author), Bootsma, D. (author)An optimal procedure to synchronize the life cycles of the individuals in a population of human cells, cultured in vitro, by repeated temporary inhibition of the DNA synthesis was elaborated. Cultures in the logarithmic growth phase were treated three times with 7.5 mM thymidine dissolved in medium. Each treatment was terminated after 24 hr by...article 1966
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TNO Preventie en Gezondheid (author), Binkhorst, R.A. (author), Pool, J. (author), van Leeuwen, P. (author), Bouhuys, A. (author)Maximum oxygen uptake ( {Mathematical expression} max), maximum heart rate (MHR), blood lactic acid (LA) and pH were measured during bicycle ergometer exercise in 52 men, 22 to 60 years old, engaged in clerical and light manual work (prison personnel and prisoners in the Netherlands). {Mathematical expression} max decreases with, age, but less...article 1966
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- Böttcher, C.J.F. (author), Klynstra, F.B. (author) article 1963
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- de Haas, J.H. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author) article 1960
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de Haas, J.H. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)An orientation of modern child care viewed in the light of the trend in Scandinavia and the Netherlands places the following concepts before us. Now that infant mortality has reached a level of twenty per thousand births, we have arrived at an important point in the development of child care. This fact forces us not only to form an impression of...article 1958
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de Haas, J.H. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)The comparison between pediatrics in East and West and in neighbouring countries is called geographical pediatrics, iqaccordance with the term Geographical Pathology. Difference in place is actually rather a difference in time. Inevitably the study of child life in the tropics is still based on Western principles. Medical thinking based on...article 1954
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- de Haas, J.H. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author) bookPart 1954