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  • Electronic Resource  (14)
  • 1975-1979  (14)
  • 1965-1969
  • 1975  (14)
Material
  • Electronic Resource  (14)
Years
  • 1975-1979  (14)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 30 (1975), S. 0 
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: An experiment is described in which 10 cutting treatments were applied to plots of perennial ryegrass. In 4 treatments the swards were cut uniformly using one of the following regimes: cut to 15 cm every 2 weeks (regime hf); cut to 15 cm every 6 weeks (hi); cut to 5 cm every 2 weeks (If); cut to 5 cm every 6 weeks (li). In the remaining 6 treatments, each plot was cut in alternate 9 cm strips using combinations of two of the above regimes; hf/hi, hf/lf, hf/li, hi/If, hi/li, and If/li. The non-uniform cutting in the latter 6 treatments resulted in a micro-pattern of height and/or frequency of defoliation.DM yield from the best non-uniform cutting method (If/li) was as great as that from the best uniform method (li). This was due to an increased yield from areas under regime If when adjacent to areas under li, compared with uniform defoliation under regime If. Results for other treatments also showed that the yield from an area can be influenced by the defoliation regime applied to adjacent areas. The trend was for yield to be greatest if adjacent areas were cut high (as opposed to low) or frequently (as opposed to infrequently). There was less bare ground and more perennial ryegrass and weeds at the end of the experiment in areas previously adjacent to frequent (0 as opposed to infrequent (i) cutting regimes.To assist in the interpretation of field results, an experiment was carried out in which uniform and non-uniform cutting treatments were applied to individual plants of perennial ryegrass growing in pots of soil in a glasshouse. There was some evidence of an interaction between the growth of high and low parts of plants cut non-uniformly. There is a discussion of the possibility of devising new ways of harvesting grass by cutting. It is suggested that the non-uniform grazing pattern of livestock may not be wasteful.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 30 (1975), S. 0 
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Cutting patterns producing high and low areas were imposed on swards of Dactylis glomerata and Lolium perenne to test whether output could be increased when compared with traditional uniform cutting methods. In two experiments, swards of both grasses were divided into parallel 9 cm strips which were cut alternately on different occasions to a height of 5 cm. These swards yielded a similar quantity of herbage DM to that from other swards cut uniformly at the same height and frequency. In a third experiment, swards of Lolium perenne were divided into alternate strips of unequal width (9 and 4.5 cm). The narrow strips were allowed to grow to a height of 15 cm and were occasionally trimmed at this height. The wide strips were cut to 5 cm at 2–or 4–weekly intervals. Areas cut to 5 cm every 2 weeks yielded significantly more DM when adjacent to high areas than when adjacent to areas cut to 5 cm every 2 weeks (i.e. under uniform cutting). The interaction between adjacent areas having different defoliation regimes is discussed in relation to the possibility of obtaining some additional output from a suitable no niform cutting system compared with uniform cutting. Sward productivity under no niform grazing patterns of livestock is also discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 47 (1975), S. 2065-2065 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 258 (1975), S. 311-313 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Large scale representation of the island/circular sea model. The island is connected to the shore of the sea by a narrow insulating neck of length 100 m at the point of closest approach. Other relevant dimensions are: island radius 10 km, sea radius 100 km, sea depth 50 m, total current ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 257 (1975), S. 224-225 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Folkman's work on tumour angiogenesis7 has emphasised the importance of vascularisation and blood supply in growth processes, and how little we know of the mechanisms involved in angiogenesis in normal development. He has shown that tumours will not grow larger than about 1-2 mm unless ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 31 (1975), S. 1361-1366 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 31 (1975), S. 1382-1385 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @Cambridge law journal 34 (1975), S. 188-191 
    ISSN: 0008-1973
    Source: Cambridge Journals Digital Archives
    Topics: Law
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neural transmission 36 (1975), S. 217-226 
    ISSN: 1435-1463
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Changes in the number of autofluorescent and serotonin-containing pinealocytes have been studied after gonadotropic hormone administration using fluorescence histochemistry. Moreover, the 5-HT levels in the pineal gland were determined biochemically under the same experimental conditions. The results suggest that pineal 5-HT levels are not influenced by increased gonadotropin levels, while the amount of autofluorescent pinealocytes increases after gonadotropin injections. It has been postulated that differences in androgenic hormone levels could not cause the changes in the number of autofluorescent pinealocytes. The reaction of the pineal gland to increased gonadotropin levels seemed important in view of the regulatory function of the epiphysis on the hypothalamo-hypophyseo-gonadal axis.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1435-1463
    Keywords: Pinealocytes ; mole ; sexual cycle ; ultrastructure ; paracrystalline structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resume L'évolution quantitative de quelques paramètres ultrastructuraux (structures paracristallines, appareils de Golgi, grains de sécrétion) des pinéalocytes de la taupe, a été suivie pendant les différentes phases du cycle sexuel. Cette étude a permis de montrer une augmentation du nombre des structures paracristallines et des appareils de Golgi pendant la phase de pleine activité sexuelle chez les mâles et pendant l'œstrus, la gestation et la lactation chez les femelles. De plus, l'apparition d'un phénomène de vacuolisation des pinéalocytes a été observée pendant le proestrus. Ces résultats semblent démontrer d'étroites relations entre l'activité endocrine de l'axe adénohypophyse-gonades et l'accroissement des synthèses des pinéalocytes. Aucune évolution du nombre de grains de sécrétion n'a été observée pendant les différentes phases du cycle sexuel.
    Notes: Summary Changes of some ultrastructural parameters (paracrystalline structures, Golgi apparatus, secretory granules) in mole pinealocytes were quantitatively studied during the various phases of the sexual cycle. An increase in quantity of paracrystalline structures and of the Golgi apparatuses was demonstrated during the period of high sexual activity in male pinealocytes and during oestrus, gestation and lactation in female pinealocytes. Moreover, the appearance of vacuoles in female pinealocytes was observed during pro-oestrus. These results seem to demonstrate close relationship between the endocrine activity of the hypophyseo-gonadal axis and the synthesis of some compounds by the pinealocytes. No increase in the quantity of secretory granules was observed during the various phases of the sexual cycle studied.
    Type of Medium: Electronic Resource
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