Health examinations were performed for VDT workers and controls in printing industries in the autumn of 1987. The data examined were 1) information regarding working conditions, 2) the kind of work, 3) subjective physical and mental symptoms and 4) factors of the Yatabe-Guilford personality test.
1. Comparison of different age groups, i.e., those in their teens, twenties and thirties or above, showed that the younger workers displayed higher factors of depression (D), change of cyclic tendency (C), inferiority feelings (I), nervousness (N), lack of objectivity (O), rhathymia (R) and social extraversion (S).
2. No significant differences were found among the YG factors for the different types of work, such as inputting numbers, word processing, searching and programming.
3. The longer the duration of the physical complaints, the higher were the values for the emotional instability factors in the YG test, such as depression (D), change of cyclic tendency (C), inferiority feelings (I), nervousness (N), and also for the social disadjustment factors such as lack of objectivity (O), lack of cooperativeness (Co), aggressiveness (Ag). Low values were recorded for ascendance (A) factors characteristic of the initiative-taking group.
4. In those whose scores of physical complaints were more than 6 points or in those whose scores of eye complaints were more than 15 points, values of rhathymia (R) were significantly higher while values of extraverted thinking were significantly lower than those with lower physical and eye complaints scores.
5. To gauge mental factors, seven questions were asked. “Do you have confidence to use computers?” those who replied that they did not have confidence scored high on the emotional instability factors and low on the general activity (G), ascendance (A) and social extraversion (S) factors that typify the initiative-taking group. When asked “Are you anxious about human relationships or the atmosphere in the office?”, those who replied they did feel anxiety had high values for the emotional instability factors and low ones for extraverted thinking. The question “Do you feel alone or estranged during VDT work?” elicited a positive reply from those who scored high on the emotional instability and the social disadjustment factors but low on extraverted thinking and factors of the initiative-taking group.

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Factors affecting the oxidation of a substrate were investigated in the oven test at 60°C, as a stability test for oils and fats against oxidation. The test was carried out by using 4 methods and by using lard with a 0.02% addition of a mixed tocopherols concentrate (m-Toc) or not, as the substrate: putting 1g of the substrate into each of several small beakers (A), as samples for periodical measurement of the peroxide value (POV), prior to storage at 60°C; putting respective 50g (B), 100g (C) and 150g (D) of the substrate into individual 200ml beaker, and periodically sampling from them for POV during storage.
1) In the oven test for lard with no m-Toc addition, the increase in POV by the B method was similar to that by the A method, but the increase became clearly slower using the C method, becoming further slower by the D method. Such differences were observed in the test for lard with the m-Toc addition, but in this case, both differences in the oxidation rates by the C and D methods from the A method were smaller than those in the above case.
2) Although the surface area/weight ratio of substrate was not changed in the A method but in the B, C and D methods during the oven test, the ratio became higher in order by the A method≈the B method>the C method>the D method. The coefficient of variation for POV repeated 5 measurements was less than 5% in almost all cases, while the coefficient of cases by the A method, in general, was slightly smaller than that by the other methods.
3) From above results, it was concluded that the surface area/weight ratio of substrate is a factor affecting the oxidation of substrate by the oven test, and the test by the A method using small beakers is suitable for evaluating stability of oils and fats against oxidation.

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The purpose of this paper is to investigate whether or not the drinking of alcohol and smoking of cigarettes have an influence on the health indices of medical examinations for middle-aged men working in a city. Following results were obtained:
1) In the group of non-smokers, habitual drinking of alcohol elevated the levels of systolic blood pressure, diastolic blood pressure, HDL-cholesterol, uric acid, and γ-GTP, lowerig those of ZTT, AL-P.
2) In the group of non-drinkers, cigarette smoking raised the levels of white blood cell, hematocrit, and it dropped those of systolic blood pressure, diastolic blood pressure, HDL-cholesterol, uric acid, GOT, and total protein.
3) When the subjects both drank alcohol and smoked cigarettes, a high-level of triglyceride was observed, and the low-levels of creatinine and red blood cell were seen.

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The decreasing inclination was suggested on the concentration of total suspended particle matter (TSP) in Umedashinmichi. Then, the concentration of metals (Fe, Mn, Zn, Cu, Pb) and ions (SO₄^2-, NO₃^-) in TSP decreased following by that of TSP. Such a decreasing inclination was not observed on the concentration of suspended particule matter (SPM), NO_x and hydrocarbons. The ratio of some metals (Fe, Zn, Mn) in TSP was relatively constant.

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