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  • 2000-2004
  • 1965-1969  (7)
  • 1945-1949
  • 1850-1859
  • 1967  (7)
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  • 2000-2004
  • 1965-1969  (7)
  • 1945-1949
  • 1850-1859
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  • 1
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    Unknown
    Two Poems (1967)
    Boston, Mass., etc. : Periodicals Archive Online (PAO)
    The North American Review. 252:3 (1967:May) Inside Back Cover 
    Details
    ISSN: 0029-2397
    Topics: English, American Studies , History
    Notes: Poetry
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3197-1967-252-03-000028
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  • 2
    Electronic Resource
    Electronic Resource
    Mid-Ocean Ridge in the Mouth of the Gulf of Aden (1967)
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 1052-1053 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Profiles obtained along the sections BX of the track are presented in Fig. 2, Depths are plotted in corrected fathoms and the magnetic anomalies are shown after deduction of the regional gradient taken from ref. 4 but without correction for daily variation. The soundings have been combined with ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2151052a0
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of training on maximum oxygen intake and on anaerobic metabolism in man (1967)
    Springer
    European journal of applied physiology 24 (1967), S. 18-23 
    Details
    ISSN: 1439-6327
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The concentration of lactate and pyruvate was determined in the blood of 13 subjects at three aerobic and four anaerobic levels of work before and after a period of training on a constant work-rate bicycle ergometer. In addition each man's maximum oxygen intake was established on either the bicycle ergometer or the motor-driven treadmill, by means of the Douglas bag technique, before and after the period of training. The results obtained demonstrated that a regime of training influenced the maximum oxygen intake and also the level of oxygen intake at which “excess lactate” starts to appear in the blood. During the training of the subjects these two physiological parameters changed independently of each other but large individual differences were also observed. The mean maximum oxygen intake of the men, which was 2.888l/min before training, increased to 3.060l/min (a change of 7 per cent) after the men had trained for a period of 4 to 16 weeks. During this period of training the mean level of oxygen intake, expressed as a percentage of the maximum value, at which “excess lactate” appeared increased from 46 to 62 per cent. The relationship between the degree of fitness and the appearance of anaerobic metabolism during work is discussed. In untrained individuals the onset of anaerobic metabolism occurred at 40–45 per cent of the maximum oxygen intake, in trained individuals at 55–60 per cent and in the exceptionally well-trained men at about 70 per cent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693572
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  • 4
    Electronic Resource
    Electronic Resource
    A comparison of the physical work capacity of individuals as determined by various tasks (1967)
    Springer
    European journal of applied physiology 24 (1967), S. 102-110 
    Details
    ISSN: 1439-6327
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The maximum oxygen intake of nine male subjects was determined on a step-test and while they were working at maximum rates on tramming and on the treadmill. For all tasks three repeated measurements of oxygen intake and heart rates were made at each level of work. Estimates of the maximum oxygen intake of the nine men, based on the data obtained from laboratory tasks such as running on the treadmill and stepping on and off a stool 12 inches high, were very similar to estimates based on an industrial task such as tramming a mine car. Results obtained during treadmill running and tramming agreed more closely with each other than the data obtained during the stepping test agree with those obtained from either the treadmill or tramming. Use of the individual's own maximum heart rate (obtained during the treadmill tests) improved estimates of maximum oxygen intake for the step-test, whereas the use of the group mean heart rate of 184 beats/min, instead of 180 beats/min, improved estimates even further.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698326
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  • 5
    Electronic Resource
    Electronic Resource
    A comparison of multi-stress tests on the sweat rate/rectal temperature relationship (1967)
    Springer
    European journal of applied physiology 23 (1967), S. 305-321 
    Details
    ISSN: 1439-6327
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sweat rates and rectal temperatures were measured hourly in two sets of 4 hour experiments. In one set, the men worked at a constant rate of 1560 ft. lbs/min requiring an oxygen consumption of 1.0 litre/ min (i.e. a metabolic rate of 5 Cal/min), at four different levels of heat stress, i.e., 87, 90, 93 and 96°F Effective Temperature on different days. In the other, the environmental heat stress was kept constant at 90° F Effective Temperature and the subjects worked at four different levels of work, each on a different day. The sweat rate/rectal temperature relationships, both on an hourly basis and as an average of the 4 hours of exposure, were closely similar in these two experiments. From this fact it is concluded that the increase in core temperature is the main factor controlling the rate of sweating. The curves relating sweat rate to rectal temperature were a little higher in the experiment in which the work rate was increased, indicating that muscular exercise has a specific and small effect on the sweat rate, apart from its influence on the core temperature. The curves fitted to sweat rate against rectal temperature showed the characteristic “sensitive” zone, i.e., a rapid rise in sweat rate with increase in rectal temperature between 98.2 to 101.0 ° F and a zone of “saturation” of the control channel, i.e., sweat rate reached a maximum value when rectal temperature rose above 101.0 ° F. A study was also made of the sweat rate/rectal temperature relationship in an experiment in which the work rate was increased at the end of each hour at a constant level of heat stress and in another experiment in which heat stress was increased at the end of each hour at a constant work rate. The curves of sweat rate against rectal temperature drawn on data obtained from these two experiments were similar but they were different from those in the first two sets of experiments, presumably because of the sweat suppression effect in the third and fourth hours of exposure. The advantages and disadvantages of the various experimental procedures are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698040
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  • 6
    Electronic Resource
    Electronic Resource
    Improving the accuracy of prediction of an individual's maximum oxygen intake (1967)
    Springer
    European journal of applied physiology 23 (1967), S. 354-366 
    Details
    ISSN: 1439-6327
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Maximum oxygen intakes, heights, weights and skinfold thicknesses were measured on 106 Bantu male recruits to the gold mines. Three different tribes from different parts of Africa were represented in the sample. Regression equations were calculated for the relationships between maximum oxygen intakes and 1. gross body weights, 2. gross body weights and heights, and 3. gross body weights, heights and per cent body fat. Residual mean squares were also calculated. From these results it can be estimated that 27 per cent of the variations between individuals in maximum oxygen intakes can be accounted for by their differences in gross body weight and a further 3 per cent by differences in height (weight is positively correlated and height negatively correlated with maximum oxygen intake). Excluding the effect of differences in per cent body fat does not alter the residual mean square so that none of the variations between individuals in maximum oxygen intake can be attributed to this factor. Treating the tribal groups separately also did not reduce the residual mean squares of any of the three tribes. Of the factors measured in this experiment only differences in weight and height in the Bantu contribute to the variations between individuals in maximum oxygen intake and 70 per cent of the variations is left unaccounted for. These results differ from those ofBuskirk andTaylor on U.S. Army recruits where 40 per cent of the variation in maximum oxygen intake was due to differences in gross body weight and where, when per cent body fat was eliminated, 70 per cent of the variations could be accounted for. A possible reason for this difference is that the Bantu subjects wereall uniformly thin. The mean per cent of body fat in the Bantu was 4.19 per cent compared with 13.7 in the Caucasians and the variations between different Bantu were also very small. Having very little body fat, one might have expected the percentage of the variation in maximum oxygen intake, which is accounted for by differences in gross body weight, to be nearer the Caucasian figure of 70 per cent (for lean body mass) than the actual figure of 27 per cent. However, there are probably large differences between these men in their nutrition, health and levels of activity on recruitment and all affect the maximum oxygen intake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698045
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  • 7
    Electronic Resource
    Electronic Resource
    Some factors affecting the mineralization of organic sulphur in soils (1967)
    Springer
    Plant and soil 26 (1967), S. 205-223 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Factors affecting the release of sulphate from a number of eastern Australian soils were studied. All of the soils released sulphate when dried. The amounts released were influenced by the manner in which the soil was dried. Air-drying in the laboratory at 20°C released least sulphate. Sulphate was mineralized in all soils by incubation at 30°C but the amounts mineralized could not be related to soil type or any single soil property. The ratio of nitrogen mineralized: sulphur mineralized varied widely between soils and was generally appreciably greater than the ratio of total nitrogen: organic sulphur in the soils. A rapid flush of mineralization of both sulphur and nitrogen took place when some of the soils were rewetted and incubated after they had been dried in the laboratory and stored for 4 to 5 months. Following this, the rate of mineralization was similar to that in the original undried soil. During this flush, the enhancement of sulphur mineralization was relatively greater than that of nitrogen so that the ratio of nitrogen mineralized: sulphur mineralized was considerably smaller than that during later phases of the incubation or that of the original moist soil. Soils collected after they had remained dry in the field for a similar period of time did not show this type of mineralization although they had initially done so when collected moist and air-dried in the laboratory. The effects of temperature, soil moisture, toluene and formaldehyde, and the addition of calcium carbonate to soils on the mineralization of sulphur were similar to their effects on the mineralization of nitrogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01880172
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