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  • Wiley-Blackwell  (58,659)
  • Blackwell Publishing Ltd  (16,274)
  • 1965-1969  (36,212)
  • 1960-1964  (27,980)
  • 1925-1929
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Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1967), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The paper traces the history of the Wild series of rectifiers, paying particular attention to the mechanical solutions of the Newton and Scheimpflug conditions.
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1966), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper gives a summary of the methods that have been used for independent model aerial triangulation. A modification of one of the methods is proposed and the paper concludes with a comparison of the independent model with the classical method of triangulation.
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  • 8
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 10
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 11
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The camera is a further development of an existing type with greatly improved photogrammetric performance so that the photography can be used with first-order plotting machines. A new lens provides minimal distortion, high resolution and greatly improved marginal illumination. An entirely new shutter provides high speeds and efficiency. Laboratory results and preliminary survey trials indicate image quality and location standards of the same order as established existing cameras.
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  • 12
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1965), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Book reviews in this article:INTERNATIONAL YEAR BOOK OF CARTOGRAPHY (Vol. IV, 1964). Editor, Eduard Imhof.JUBILEE VOLUME DEDICATED TO WILLEM SCHERMERHORN ON HIS SEVENTIETH ANNIVERSARY: ESSAYS ON THE DEVELOPMENT OF PHOTOGRAMMETRY. Published by I.T.C., Delft.
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  • 13
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 3 (1961), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Book reviews in this article:THE CHESA PHOTOGRAMMETRIC EXPERIMENT (Technical Publication
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  • 14
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 15
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 16
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The geologist's use of air photographs and the characteristics studied by photogeologists are briefly described. The influence of photographic factors such as scale, season, time of day, film type, processing, overlap and dimensional accuracy are considered from the geologist's viewpoint.
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  • 17
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper modifies the well-known formula that corrects x-parallaxes for tilt. It shows how we can make significant improvements in accuracy with a no more complicated formula, in which the effects of ground relief are completely removed; and how we can reduce the second-order errors due to lateral (w) tilts by very large factors in favourable cases.
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  • 18
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 19
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 20
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1967), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Land systems are patterns of landscape recognised on aerial photographs and mapped to define areas of similar terrain with a similar environment. Breaks of slope often form the major boundaries both between and within land systems. They can be usefully mapped from aerial photographs even if their significance can only be deduced after ground investigation. Many of the characteristics of land systems can be appreciated from aerial photographs and measurements made on the photographs can improve their quantitative description.
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  • 21
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1967), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: A method of slotted templet triangulation is described in which the authors have used photographs printed on a stable base as the templets. The advantages, disadvantages and possibilities of the method are discussed.
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  • 22
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1964), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 23
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1964), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The author describes conventional methods of highway planning and explains at what points modern methods, involving photogrammetric and electronic computation techniques, can be applied with advantage. Detailed accounts are given of the photogrammetric measurement of cross-sections and of programmes for the computation of masses.
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  • 24
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1964), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 25
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1964), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: A Leica camera on an indexing head was used to obtain photographic panoramas from three stations on a mountaineering expedition to Lahul in 1958. The field calibration of the camera presented some problems and various methods of calculating the focal length were investigated; a more convenient form of the Hotine method was derived. A map of the area at a scale of 1:50,000 was plotted from the photographs. The authors conclude that a good 35-mm. camera has some advantages over a plane table for exploration mapping.
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  • 26
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1964), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper discusses the principal changes made to the Thompson- Watts plotter Model 1 as a result of experience gained with that instrument under test and in production. Some test results with the new instrument, Model 2, are given at the end of the paper. The opportunity is also taken to describe the variable magnification system of the instrument, not changed from Model 1.
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  • 27
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1963), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 28
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1963), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 29
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1962), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 30
    Electronic Resource
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 4 (1962), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
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  • 31
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The paper gives, for a large number of cases, numerical errors due to using approximate, first-order, formulae for correcting x-parallaxes for tilt. The figures show that the errors are considerably smaller than might be expected. It is also shown that the root mean square of the four tilts of a pair of pictures is a reliable measure from which the effect of tilt on heights can be estimated with some confidence.
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  • 32
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 33
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 34
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 35
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Research work is being undertaken by the Department of Orthodontics at Addenbrooke's Hospital, Cambridge, which involves studying the growth of children's faces in three dimensions. In evaluating the morphology of soft tissues, the advantages offered by photogrammetry have been recognised and this paper describes how the technique has been put into practice at the hospital where a stereometric instrument, equally suitable for use as a camera or as a projection plotter, has been constructed.
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  • 36
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
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  • 37
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
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  • 38
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The history of the Argentine-Chile frontier is briefly reviewed. The paper then describes the photogrammetric and land-surveying work that formed part of the recent settlement of a section of the frontier, that was referred to the British Government for arbitration.
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  • 39
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
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  • 40
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Topics of immediate practical interest formed the basis of the Address. Particular emphasis was placed upon problems of point transfer, pre-marking of ground control points, aerial triangulation by observation of independent models, and the status of photogrammetric operators.
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  • 41
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The article describes a method of strip aerial triangulation using the Wild B8 plotter. The principal feature of the method is the transfer of exterior orientation of a camera by measurement of outer orientation parallel to successive airbases.
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  • 42
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 43
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1968), S. 0 
    ISSN: 1477-9730
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    Topics: Architecture, Civil Engineering, Surveying
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  • 44
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 5 (1967), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: After a brief review of the history of the orthophoto mapping process and its methods, the paper describes the automatic production of orthophotographs in the BS-Stereomat. Technical details, especially of the electronics of the instrument, are given. The range of applications of an orthophoto is discussed, as well as the method's limitations.
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  • 45
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    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 6 (1969), S. 0 
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Equipment manufactured in connexion with the special applications of photogrammetry has developed from very early designs, often with remarkably few changes. The first section of the paper traces this evolution up to the present time.Architectural photogrammetry has been, since Meydenbauer, one of the most important of these special applications and the second part describes some recent work of this type in England and Jordan.
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  • 46
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    The @photogrammetric record 6 (1969), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The problem of incorporating airborne auxiliary data into an aerial triangulation block adjustment is considered. The conclusion is reached that this problem can be most readily solved by the use of a fully rigorous adjustment method. The first order adjustment equations for all types of airborne auxiliary control are developed and the method of incorporating these equations into the block solution is demonstrated. The general computing problems of the aerial triangulation block adjustment are briefly discussed and a method outlined for the incorporation of tie strips, at any angle across the block, into the adjustment without unduly increasing the storage requirements for the solution. The problem of correctly weighting the different types of available data is discussed. The paper concludes with a demonstration of the improved accuracy possible if precise aerial triangulation data are combined with apparently crude absolute airborne data.
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  • 47
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    The @photogrammetric record 5 (1966), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: The author explains one of the chief problems, the composition of a survey aircraft navigation system, facing Commission I of the International Society for Photogrammetry. The tasks to be accomplished by such a system are outlined, and some of the alternative equipment available to carry out the various aspects of this work are discussed.
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  • 48
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    The @photogrammetric record 5 (1966), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: It is well known that there exists a “danger cylinder” for space resection, analogous to the “danger circle” in the plane, on which the resection is unstable. This paper shows how the existence of this surface may be detected and draws attention to the way in which the instability differs from that in the plane.
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  • 49
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    The @photogrammetric record 5 (1965), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: A successful attempt has been made to produce design plans of large chemical plant using photogrammetric techniques, and involving the development and modification of cameras and plotting equipment. Photogrammetry has provided a solution to a problem which could not easily be solved by direct methods.
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  • 50
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    The @photogrammetric record 5 (1965), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Book reviews in this article:PROCEEDINGS OF THE SECOND NATIONAL CONFERENCE OF SOUTH AFRICAN SURVEYORS, FEBRUARY 1964. Edited by G. H. Menzies et al.
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  • 51
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    The @photogrammetric record 5 (1965), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Four authors review the activities of the seven Commissions of the I.S.P. at the Xth International Congress, Lisbon, 1964.
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  • 52
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    The @photogrammetric record 5 (1965), S. 0 
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  • 53
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    The @photogrammetric record 5 (1965), S. 0 
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  • 54
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    The @photogrammetric record 5 (1965), S. 0 
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  • 55
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    The @photogrammetric record 4 (1964), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper is divided into two parts: the first discusses the practical navigation techniques evolved for air survey, and the second deals with the associated techniques of ground plotting and flight-line recovery. Both parts of the paper have a geophysical bias since it is in this field that most experience has been gained, but the basic principles apply equally to photographic survey.
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    The @photogrammetric record 4 (1964), S. 0 
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Calculated precision turns can be valuable as an aid to visual navigation at all scales and under all conditions of air survey navigation. The turns can be performed either at a given rate of turn or at a given angle of bank, and a slide rule has been developed at the International Training Centre for Aerial Survey, Delft, on which the necessary calculations for either case can be performed quickly and easily. The accuracy of location aimed at is such that the threshold of the new run presents an angle-off of not more than 3° on the completion of the turn. Examples show that this can be achieved in normal practice.
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    Notes: Recent developments in stereoscopy are reviewed, and their relevance to photogrammetry discussed.
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    Notes: Book reviews in this article: ELEMENTARY PHOTOGRAMMETRY. By D. R. Crone. INTERNATIONAL YEARBOOK OF CARTOGRAPHY (Vol. III, 1963). Editor, Eduard Imhof.
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    Notes: The author describes the responsibilities of the forester both for the production of timber and the preservation of natural resources, and shows how aerial photographs can assist in supplying the information required for organising the management of forest areas. On limited experience with infrared and colour films, the author compares them with panchromatic film for aerial photography of forest country; he considers that in most cases good definition is the most desirable quality in such photographs, although special contrast effects may be useful for particular purposes.
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    Notes: A brief description is given of the history of the stereocomparator, followed by a comparison of the major features of five modern instruments: the Wild STK 1, Nistri TA 3 and TA 3/A, S.O.M., Zeiss PSK 1 and Hilger and Watts stereocomparators. Special attention is paid to the production model of the Hilger and Watts stereocomparator, which differs in several important respects from the prototype.
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    Notes: Three unrelated matters are discussed. Firstly, the recent rapid advances in the application of precision engineering, electronics and digital computers to photogrammetric surveying operations are shown to be likely to result in a change of emphasis; from the need for great skill in making each particular map, to the need for even greater skill in making machines which, once made, will make many maps, largely automatically. This in turn is likely to have far-reaching effects on the type and training of persons employed in the profession. Secondly, an example is quoted which suggests that the value of photogrammetric methods, as an aid to the work of professions other than land surveying, is not sufficiently recognised by the teaching faculties of some of our universities. Ways and means of improving the situation are considered. Thirdly, after a brief historical survey of the birth and growth of the Photogrammetric Record, arguments for and against some possible changes in editorial policy are stated and certain conclusions reached.
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    Notes: Book reviews in this article:GEODESY. By Brigadier G. Bomford.INTERNATIONAL YEAR BOOK OF CARTOGRAPHY (Vol. II, 1962). Editor, Eduard Imhof.MODERN COMPUTING METHODS. National Physical Laboratory: Notes on Applied Science.SCIENTIFIC PHOTOGRAPHY. Editor, H. Sauvenier.
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    The @photogrammetric record 5 (1967), S. 0 
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    Notes: This paper discusses a simple method of computing independent strips under certain reasonable approximations. It is shown that, if the method is regarded as if it were computation by polynomials, the order of the polynomial is decided by the nature of the control provided and not by the number of controlled models. This conclusion should throw some light on the vexed (and perennial) problem of the choice of orders for polynomials.
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    Notes: An attempt is made to review the factors affecting the use of colour photography in photogrammetry and photo-interpretation. Examples of current practice and results of comparative tests are quoted, as well as the advantages and deficiencies of the various materials available.
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    Notes: During the summer of 1965, colour, false colour, infra-red and panchromatic photography was flown of the Breidamerkur Glacier area in south-east Iceland. Subsequent comparative interpretation studies of the film types have indicated that colour photography is superior for the interpretation of glacierized† areas. This is attributed to brightness qualities and a continuous colour tone range, which, in this instance, closely matched visual representation of ground objects.The false colour film, due to the striking tonal qualities of vegetation and moisture, is considered best for studies involving the delimitation of these features. Panchromatic film appears to be satisfactory for general interpretation work, particularly where the utmost in definition is called for. The infra-red film, because of the dark tones produced by gravels and the subsequent high contrasts between ice and gravel debris on the ice surface, is considered a poor choice for the interpretation of glacierized areas.
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    Notes: This paper gives convenient formulae for numerical relative orientation for use with instruments in which the Y-parallax may be accurately measured.
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    Notes: Rather than rely on laboratory calibration, test fields have been established in Sweden to enable photography from a tower or aircraft, and so simulate as nearly as possible actual operational conditions. Repeated experiments, followed by analysis of photography, and the application of statistical tests, have allowed the geometrical quality of the aerial photograph to be assessed, and systematic and irregular errors to be distinguished.
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    Notes: It does not seem to be widely recognised that the solution of the space resection problem from measurements made on a single photograph of three ground control points is not unique. There are, in general, four solutions, so that either the camera orientation must be approximately known (as is the case for near vertical photography) or extra control must be used to discriminate between these solutions. The iterative solution commonly used will only yield one solution, which will be correct if the photography is nearly vertical, but which is liable to be wrong in the general case. An explicit solution is therefore preferred since all solutions may be examined in the light of such extra control as is available. This paper gives a method for such a solution and shows how the discrimination should be used. The paper goes on to derive a method of adjusting the result to redundant control by least squares.
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    Notes: The Stereomat System has been adapted to a modified Wild B8 Aviograph Stereoplotter. A brief description is given of the new instrument and the principles employed.
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    Notes: The salient features of a method of analytical triangulation operating directly on single photographs are described, and the close analogy with geodetic triangulation computation is demonstrated.Any combination of photographs, whether in stereo pairs, stereo triples, strips, sub-blocks or blocks, is handled by forming the set of observation equations for each individual photograph in turn, and then taking all these sets together and solving them simultaneously by the method of least squares.Special procedures for dealing with very large numbers of variables are discussed, and certain applications of the method are indicated.
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    The @journal of eukaryotic microbiology 9 (1962), S. 0 
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    Notes: SYNOPSIS. A chemically defined culture medium has been developed for the soil amoeba Hartmannella rhysodes Singh which contains the minimum essential organic requirements for growth. The medium consists of 7 amino acids, 3 vitamins, a carbon source (e.g. glucose) and inorganic salts.
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    Notes: SYNOPSIS. A mutant strain of Astasia longa utilized glucose for growth whereas the parent (J) strain did not. The optimal pH for growth of the mutant with glucose (sole carbon source) was near neutrality; the optimal glucose concentration 0.02 M. Cell-free extracts or cell homogenates produced C14O2 when incubated in the presence of C14-labeled glucose. On the other hand, after incubation with C14-labeled glucose, intact parent cells and their respiratory CO2 showed no radioactivity while the mutant-strain cells and CO2 produced were active. Dissimilation of glucose-1-C14 and glucose-6-C14 yielded the same amount of radioactivity in metabolic CO2 in cell-free extracts of both strains. Of five enzymes assayed, hexokinase, phosphoglucomutase, and lactic dehydrogenase were present whereas glucose-6-PO4 dehydrogenase and glucose dehydrogenase were absent in cell homogenates of both strains. Presumably these two strains of A. longa differ in permeability of the plasma membrane. Further tracer and enzyme studies indicated that the Embden-Meyerhof scheme is the principal pathway of glucose catabolism; the hexose mono-phosphate shunt and the direct oxidative pathway were either not operating or quantitatively insignificant.
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    Notes: SYNOPSIS. By means of electron microscopy, a study has been made of the fine structure of the macrogametocytes, microgametocytes and oocysts of Eimeria perforans from the intestine of the wild rabbit (Oryctolagus cuniculus). The parasites lie in a vacuole within the host cell. The surface of the gametocytes is not plain, but displays irregular protrusions. A large intranuclear body can be detected within the macrogametocytes. Similar structures are also found within the cytoplasm. Within the latter there exists a large spread out reticulum, the channels and vesicles of which concentrate especially close to the nuclear membrane. Tubuli are seen in the numerous mitochondria, which often have a dumb-bell shape.In most of the gametocytes irregular, strongly osmiophilic lipid inclusions are observed, which always are surrounded by the endoplasmic reticulum. Strange folded ovoid bodies are found within the cytoplasm of the oocysts. Nothing can be told with certainty of their nature and function. Probably they represent specific storage bodies.
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    Notes: SYNOPSIS. Tritrichomonas foetus survived much better on extended storage at -95 than at -28d̀C following slow freezing in the presence of 1.0 M glycerol. There was no significant difference between these temperatures in survival up to 8 days, but thereafter the protozoa continued to die off slowly at -28d̀, whereas their numbers remained essentially constant at -95d̀ for 128 to 256 days. The trichomonads' motility was much better after storage at -95d̀ than after storage at -28d̀, and fresh cultures could be initiated from the former much more readily.Other constituents of the suspending medium besides glycerol affect the survival of the protozoa upon freezing. Survival was much better when the protozoa were frozen in the original Diamond's trypticase-yeast extract-maltose-cysteine-ascorbic acid-serum medium in which they had been grown than when they were frozen in physiological salt solution or in fresh Diamond's medium. There was no significant difference between survival in the latter two suspending media. The speed and time of centrifugation needed to remove the trichomonads from the medium in which they had been grown had no effect on their survival upon subsequent freezing. Presumably some product or products of the trichomonads' metabolism have an additional protective action which supplements that of glycerol.When frozen in the original Diamond's medium in which they had been grown plus 1.0 M glycerol, an average of 15% of the trichomonads were alive after 128 days' storage at -28d̀ and an average of 38% were alive at -95d̀C. When frozen in physiological salt solution plus 1.0 M glycerol, these percentages were 8% and 12% respectively.
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    Notes: SYNOPSIS. When Spathidium spathula was exposed to X-ray doses ranging from 1–25 kr this animal was found to be more radiosensitive than any ciliate previously reported. A dose of 1 kr is sufficient to increase the time of the first generation from 5 to about 5 1/2 hours. A dose of 4 kr is enough to approximately double the generation time. Bacteria in the medium during irradiation do not protect the ciliate against injury. Animals irradiated as dry cysts are only slightly more resistant than vegetative forms, requiring 10 kr to double the generation time. One day after exposure, irradiated lines are uniformly poor in growth rate (0–2 daily divisions), but later a bimodal response is noticed, some lines remaining poor and others recovering. Within 24 hours after treatment, a number of irradiated animals show structural abnormalities and are greatly increased in size. The experiments have not determined the reason for the high sensitivity of Spathidium but have made certain alternatives unlikely.
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    Notes: SYNOPSIS. When Tetrahymena suspended in water were given increasing doses of radiation, oxygen consumption decreased with increasing dose, reaching 60–90% at 600,000 r. Cells irradiated in 0.07 M phosphate buffer, pH 7.4, showed no significant decrease in oxygen consumption even at 600,000 r. The decrease in respiration observed on irradiation of Tetrahymena pyriformis W in water with 300,000 r of X-radiation was prevented by addition of pyruvate or acetate during or immediately after irradiation. Pyruvate stimulated the respiration of the X-irradiated cells, particularly at 10 and 60 min post-irradiation.Lactate markedly stimulated the respiration of control suspensions of Tetrahymena cells and oxidation of lactate by cells irradiated with 300,000 r was increased by 20 to 100%, depending on the concentration of lactate and the time after irradiation. Pyruvate was considerably more effective than lactate in increasing O2 uptake of X-irradiated cells, particularly at 10 min post-irradiation. Thioctic acid affected neither the respiration of control or X-irradiated Tetrahymena nor the oxidation of pyruvate.The growth lag of Tetrahymena increased proportionately with increasing radiation dose; no cells survived 600,000 r. The presence of metabolites during irradiation did not affect the lag period or subsequent growth rates. The effects observed were discussed in terms of an alteration of the permeability of Tetrahymena after irradiation.
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    Notes: SYNOPSIS. A full account of the nuclear changes during binary fission and conjugation in a local race of Blepharisma is presented in this paper. The macronucleus consists of 2 nodes connected by a strand. Number of micronuclei varies from 6 to 18. During binary fission, condensation of macronucleus is followed by elongation and thinning of the middle region which finally breaks. Daughter nuclei later attain the typical vegetative form. Notably, during binary fission some micronuclei appear to complete their mitoses by the time the macronucleus attains the condensed form, while others lag behind and exhibit practically every stage of mitosis.During conjugation, from 6 to 10 micronuclei undergo the first pregamic division, the same number through the second division, and two products of the second division take part in the third division. The rest degenerate. Division products of the nuclei in the paraoral region take part in synkaryon formation. The synkaryon undergoes either 2 or 3 divisions. In the former case, of the 4 products, 2 become the macronuclear anlagen, one the micronucleus and the fourth degenerates. In the latter case, of the 8 products, 3 to 4 become the macronuclear anlagen and the rest become micronuclei. Chromatin elimination has been observed during the division of the macronuclear anlage, followed by an extra metagamic fission of the cell.Comparison with two other races from India and an American race indicates considerable diversity in the structure and behaviour of the nuclear apparatus in different races of Blepharisma undulans.
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    Notes: SYNOPSIS. Females of Heterakis gallinae were separated on the basis of their capacity to transmit the protozoan parasite Histomonas meleagridis. Sections of worms, capable of transmitting the protozoon, revealed the organism in both males and females as well as in the eggs. Infected male worms contained histomonads in the gut wall and the wall and lumen of the reproductive system. Female worms infected with H. meleagridis showed the organisms throughout the reproductive system. Histomonads, found in uterine eggs possessing shells, had a larger nucleus and reduced cytoplasm.Because of the presence of the protozoon among the sperm in the male reproductive system, it is believed the organism can be transmitted to female worms through copulation. The cycle in the worms also supports the assumption that H. meleagridis was originally a parasite of the worm.
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    Notes: SYNOPSIS. Speculations regarding the mode of transmission of monocystid parasites of earthworms over a period of more than 100 years have never been tested experimentally under controlled conditions. In order to do so a stock of infectionfree Eisenia foetida (Sav.) was raised from cocoons and experimental infections were induced in this host using sporocysts of the gregarine parasites Apolocystis elongata Phillips & Mackinnon 1946, and Nematocystis elmassiani (Hesse, 1909). Experimental infections were obtained by feeding to uninfected worms sporocysts obtained directly from infected host worms. This proved that the intervention of a vector is not a necessary condition of infection. Infections could not be induced by injecting sporocysts through the body wall into the body cavity. Infections are thus probably acquired in nature by the ingestion of sporocysts. Sporocysts do not leave the body of the host by being passed from coelom to lumen of the gut, nor do they pass directly to the exterior through apertures of the body wall. There was no evidence of parasitic autotomy. It is therefore concluded that death and decay of the host is the normal method of dissemination of sporocysts. Sporocysts were not infective after drying in air for three weeks. Other sporocysts lost potency after storage in moist conditions for several months. Infections involving the organisms specified were sporadic and unpredictable; modifying factors, such as variations in host susceptibility and latency in infection, appeared to be operating.
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    Notes: SYNOPSIS. By an automatic electronic technique—the Flying Spot Particle Resolver—the effect of a wide range of concentrations of vitamin B12 on the size and growth of the B12-dependent Euglena gracilis was studied. Rate of cell growth was directly proportional, and cell size inversely proportional, to B12 concentration. Gross B12 depletion resulted in gigantism and prolongation of generation times.
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Previously, the reproduction-inhibiting effects of ablastin could only be shown in vivo. The present report describes techniques for the in vitro demonstration and titration of this antibody. With a medium composed of Hanks' balanced salt solution, rat serum, lactalbumin hydrolysate, yeast extract and rat blood lysate, blood stream forms of Trypanosoma lewisi can be grown for approximately 24 hours at 37d̀C. Starting with the medium containing normal rat serum and inoculated with adult (inhibited) trypanosomes from infected rat blood, 50% or more of the parasites are in various stages of division after incubation overnight. Under similar conditions with ablastic rat serum, the parasites do not reproduce but remain as adults. If the medium is inoculated with reproducing trypanosomes from the blood, parasites in the presence of normal serum continue to reproduce, whereas those exposed to ablastin are almost completely converted to adult, non-reproducing forms. Similar results are obtained when the immune sera used are first adsorbed with living parasites to remove all trypanocidal antibodies. Ablastic serum inactivated at 56d̀C for 20 minutes does not lose its inhibitory activity indicating that ablastin is not complement dependent, and parasites grown on media at room temperature are not affected by the antibody suggesting that basic antigenic differences exist between blood stream forms at 37d̀C and culture forms at room temperature. Studies of the conversion of blood stream forms to culture forms indicate that the critical temperature range for the conversion lies between 28d̀ and 30d̀C. The significance of these results is discussed, and possible applications of the techniques described to studies of the mechanism of ablastic action are considered.
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  • 95
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 9 (1962), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Normal swimming behavior of Paramecium multimicronucleatum in an essential mineral element solution with 0.0002 M calcium changed into continuous avoidance reactions upon replacement by equimolar strontium; equimolar barium produced a less pronounced similar effect. In equivalent pure SrCl2 and BaCl2 solutions, avoidance reactions were less frequent than in the balanced solutions. P. multimicronucleatum inoculated into autoclaved calcium- or strontium-containing cultures of the alga Protosiphon botryoides (ultimate food source) multiplied greatly and essentially equally, but died in barium. Accelerated avoidance reaction rates were observed in strontium up to and at 32 days after inoculation.
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  • 96
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 9 (1962), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. A previous study of parasites from relapsed P. berghei infections of mice indicated that the behavior of the relapse parasites differed from that of their parent strain. Experiments have been performed comparing the behavior of relapse and parent parasite infections in mice under two sets of conditions. In one group of experiments the behavior after antimalarial treatments, designed to result in chronic or latent states of infection, was tested. In all, 8 relapse strains were tested against their parent strains in six different experiments which employed 536 mice. It was observed that the mice infected with the relapse strains had a statistically significant greater mortality after the treatments than did mice infected with parent strains. This difference was observed regardless of how the relapse strain had been previously treated, or of what treatment was used in the experiments. In a second group of experiments, the behavior of infections with relapse and parent parasites was compared in normal mice. Five relapse strains were compared to their parent strains in a total of 5 experiments using 356 mice. It was observed that the mean survival time of mice infected with relapse strains was significantly greater than that of mice infected with the parent strains. It is not known whether this apparent difference in the behavior of relapse and parent parasites is related to the mechanism for relapse of P. berghei infections, or is merely a characteristic of parasites that had survived in an immune host.
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  • 97
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The rate of ingestion of cytoplasm from its prey ciliate by Podophrya collini shows a maximum at 18°C. The rate of ingestion is the same for all active tentacles during the feeding period. Calculation of the amount of cytoplasm ingested from rate measurement and from dimensional alterations of ciliate and suctorian during feeding indicates conformity to the hypothesis that the motive force for ingestion results from integrated activity of the total cell and not from autonomous activity of the tentacles alone. The estimated motive force approximates 0.2 atmosphere. Data is presented to indicate that energy to maintain this motive force is derived from the normal oxidative metabolism of the suctorian.
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  • 98
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Hepatozoon procyonis, n. sp., is described from the raccoon Procyon lotor from southwestern Georgia. Mature gametocytes in monocytes in blood smears and schizocysts and developing gametocytes in sections of heart tissue were observed and described. A Hepatozoon was also found in the fox squirrel Sciurus niger.
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  • 99
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In Paramecium there is no known correlation between the direction of electric current through the membrane and of ciliary beat. One reason is that the Ludloff phenomenon, an anodal shift in the limit of the area of reversal with increased current strength, has seemed contradictory to most other data. However, by assuming Paramecium to be a core conductor immersed in a volume conductor and by applying the laws of polarizing currents it is possible to explain all existing data on reversal of normal ciliary action, and also on activation of cilia in immobilized specimens by electrical current. It is assumed that a threshold degree of depolarization of the normal membrane potential or of current density causes reversal. The Ludloff phenomenon is caused by anodal progression of this degree of depolarization with increasing membranecurrent. If it is also assumed that an increase in the membrane potential of immobilized specimens causes activation in the normal direction, one can predict anodal activation, progression of reversal with decrement in velocity, time course of development of excitation, ancdal stimulation upon “break.” stimulation by linearly rising currents, relative refractory and supernormal periods, effect of angle of orientation, and effect of acetylcholine and antiacetylchoiine esterase. Assumption of a neuromotor system is not needed. However, if available data are interpreted in the manner commonly used for nerve it can be concluded that an active accommodative process exists and possibly also a local excitatory state. A recent “dipolar” theory of galvanotaxis is not acceptable because it does not include ciliary reversal.
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  • 100
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The morphologic phenomena of the conjugation of Paramecium caudatum are analysed by transverse sectioning of couples at the level of the junction zone. This orientation allows exact determination of the adjacent surfaces (which strongly suggests the absence of a paroral cone) and their relation to the ciliary fields. The modifications of the outer pellicle are studied with the electron microscope. It is shown that cytoplasmic communications occur at the top of the ridges which limit the periciliary depressions. The kinetosomes remain apparently intact but cilia and trichocysts disappear. An active role by the latter organelles is suggested for the union of the two conjugants.
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