(2,081 - 2,100 of 2,106)

Pages

document
Rijken, D.C. (author), Wijngaards, G. (author), Zaal-de Jong, M. (author), Welbergen, J. (author), Gaubius instituut TNO (author)
A procedure was developed for the purification of a plasminogen activator from human uterine tissue. It involves six consecutive steps: extraction of the plasminogen activator from delipidated uterine tissue with 0.3 M potassium acetate buffer, pH 4.2; ammonium sulphate precipitation; zinc chelate-agarose chromatography; n-butyl-agarose...
article 1979
document
Zelle, B. (author), Lohman, P.H.M. (author), Medisch Biologisch Laboratorium TNO (author)
Chemicals/CAS: endonuclease, 9055-11-2; DNA, 9007-49-2; Pyrimidine Dimers
article 1979
document
Gaillard, A.W.K. (author), Perdok, J. (author), Instituut voor Zintuigfysiologie TNO (author)
Slow EEG potentials (Fz, Cz, Pz) and heart rate were recorded during the foreperiod of a reaction task, which involved different levels of discrimination difficulty. A simple reaction task was compared with a selective reaction task where either an easy or a difficult discrimination was required. In general, the terminal amplitude of the CNV was...
article 1979
document
Kluft, C. (author), Trumpi-Kalshoven, M.M. (author), Jie, A.F.H. (author), Veldhuyzen-Stolk, E.C. (author), Gaubius instituut TNO (author)
Fibrinolytic studies in euglobulin fractions of Fletcher trait plasma (deficient in prekallikrein) revealed reduced activities as compared to normal plasma. A quantitative assay for total plasminogen activator plus proactivator in plasma showed that the amount in Fletcher trait patients is about half of normal (normal = ?? 100 blood activator...
article 1979
document
Polak, R.L. (author), Molenaar, P.C. (author), Medisch Biologisch Laboratorium TNO (author)
A new procedure is described for the estimation of ACh by pyrolysis-gas chromatography/mass spectrometry. ACh iodide and the iodides of ACh-d16 or propionylcholine are slowly demethylated at 250??C by pyrolysis on the tip of a glass probe after insertion into the heated entrance of a glass tube leading to a packed capillary column. The volatile...
article 1979
document
von Lossonczy, T.O. (author), Ruiter, A. (author), Bronsgeest-Schoute, H.C. (author), van Gent, C.M. (author), Hermus, R.J.J. (author)
A cross-over study was done with 19 male and 23 female volunteers living in a monastery and a convent, respectively. The effect of a fat fish (mackerel) diet on the blood serum lipid composition was studied. As the normal diet of these volunteers was of the lacto-ovo-vegetarian type, a control diet in which the fish was replaced by full-fat...
article 1978
document
Bleiker, M.A. (author), Styblo, K. (author), Gezondheidsorganisatie TNO (author)
If the trend in risk of tuberculosis infection is estimated from the 1967-1976 data alone (which contain only 6 usable annual figures), the estimate is a decrease of 9.3% annually, a figure substantially lower than the estimate from the 1956-1966 data alone, viz. 13.7%. It is as yet impossible to decide whether or not this represents a real...
article 1978
document
Jonkman, E.J. (author), Mosmans, P.C.M. (author)
other 1977
document
van der Waaij, D. (author), Vossen, J.M. (author), Korthals Altes, C. (author), Hartgrink, C. (author), Radiobiologisch Instituut TNO (author)
Antibiotic decontamination of the digestive tract can suppress or eliminate all microorganisms in this tract that are sensitive to the antibiotics used for decontamination. Experimental work in animals has indicated that colonization resistance (CR) decreases to extremely low values during decontamination as a result of the suppression of the...
article 1977
document
Kluft, C. (author), Jenks, R.L. (author), Astrup, T. (author), Gaubius instituut TNO (author)
The authors studied the production of fibrinolytic activity in Hageman trait plasma, and conclude that the development of activator activity in euglobulin fractions is delayed, particularly in the Hageman trait plasma, by the presence of C1 inactivator, an inhibitor whose effect can be abolished by the synthetic compound flufenamic acid. Using...
article 1977
document
Gaillard, A.W.K. (author), Trumbo, D.A. (author), Instituut voor Zintuigfysiologie TNO (author)
The effects of an amphetamine and a barbiturate on heart rate were investigated during long term performance. Subjects worked for three hours in a serial reaction test, which included blocks with variable or constant interstimulus intervals (ISI). Besides the interbeat interval (IBI), derived from the successive R peaks of the ECG, the...
article 1976
document
Bunt, A.A. (author)
Thirty-two subjects had tests of serial recall of visually presented nine-digit lists which were either presented in a single block of trials (constant context) or in between lists of much longer length (variable context). Other variables were vocalization-during-presentation versus silent memorization (within subject) and order of recall ...
article 1976
document
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
document
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
document
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
document
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
document
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
document
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
document
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
document
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
(2,081 - 2,100 of 2,106)

Pages