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  • Nature Publishing Group  (38,683)
  • 1995-1999  (12,082)
  • 1965-1969  (26,601)
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  • 1
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    The planktonic life of octopuses (1995)
    Nature Publishing Group
    In:  Nature, 377 (6545). p. 107.
    Details
    Publication Date: 2017-07-04
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  • 2
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    Yet more danger for coelacanths (1995)
    Nature Publishing Group
    In:  Nature, 374 (6520). p. 314.
    Details
    Publication Date: 2017-07-06
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  • 3
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    Acoustic observations of heat content across the Mediterranean Sea (1997)
    Nature Publishing Group
    In:  Nature, 385 . pp. 615-617.
    Details
    Publication Date: 2017-02-27
    Description: The ability to monitor the heat content of oceans over long distances is becoming increasingly important for understanding the role of oceans in climate change, for determining the variability of the state of the oceans, for operational ocean observing systems, and for studying large-scale ocean processes such as water-mass formation. Although the properties of the upper layers of the ocean can be routinely measured on large scales by satellite remote sensing (providing altimetric and infrared data) and with expendable probes dropped from commercial vessels, the deep interior of the ocean is more difficult to monitor. Ocean acoustic tomography1 is a promising technique for such applications, as it has the potential to provide systematic, instantaneous and repeated measurements of the ocean interior over large parts of an ocean basin. Here we demonstrate the capability of this technique for measuring the heat content across an entire (albeit small) ocean basin—the western Mediterranean Sea.
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  • 4
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    Two-way exchange between the Easter mantle plume and the Easter microplate spreading axis (1996)
    Nature Publishing Group
    In:  Nature, 382 (6589). pp. 344-346.
    Details
    Publication Date: 2017-02-27
    Description: The conventional model whereby plume volcanism forms linear age-progressive volcanic chains, with the youngest activity occurring nearest a spreading axis (at a 'hotspot'), has been challenged for the Easter seamount chain1–4. Whereas early work suggested the existence of a linear melting anomaly (a 'hotline')1,2, more recent studies3,4 have proposed a hotspot near Salas y Gomez island, connected with the Easter microplate spreading system by an ~800-km-long, volcanically active plume channel. Here we use geochemical, geological and geochronological data to argue that the hotspot lies close to Easter Island. Moreover, new isotopic data for lavas from the seamount chain provide evidence for bidirectional flow between the spreading axis and the plume, thus supporting geophysical and fluid-dynamical models of mantle flow in a plume/spreading axis system5–7. Material balance and flux considerations show the Easter plume to be weak and cool compared with those beneath larger features such as Iceland, Hawaii and the Galápagos islands.
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  • 5
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    Oceanography: All change in the Arctic (1999)
    Nature Publishing Group
    In:  Nature, 397 (6718). pp. 389-391.
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    Publication Date: 2015-07-16
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  • 6
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    Chlorin accumulation rate as a proxy for Quaternary marine primary productivity (1996)
    Nature Publishing Group
    In:  Nature, 383 (6595). pp. 63-65.
    Details
    Publication Date: 2017-02-27
    Description: A knowledge of past changes in the biological productivity of the oceans is important for understanding the interactions between carbon cycling and climate. Phytoplankton productivity in today's oceans can be estimated from the concentrations of chlorophyll in sea water1, but chlorophyll is not preserved in the sediments. Existing proxies for past algal productivity do not represent total productivity; for example, biogenic opal2 reflects the contribution of only part of the phytoplankton community, and the organic carbon record can be subject to contamination from terrestrial inputs2,3. Although chlorins, the pigment-transformation products of chlorophyll, are widespread in Quaternary marine sediments, their potential as proxy measures of past variations in primary productivity has not been convincingly demonstrated. Here we report a high-resolution molecular stratigraphic record of chlorin concentrations over the past 350,000 years in a sediment core from the subtropical Atlantic continental margin. Maxima in the chlorin accumulation rate coincide with significant peaks in the accumulation rates of biogenic opal (at the end of glacial terminations) and organic carbon (between terminations). These results suggest that chlorins, unlike other proxies, can serve as a measure of total primary productivity variations.
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  • 7
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    Manganese Nodules, Topography and Thickness of Quaternary Sediments in the Central Pacific (1966)
    Nature Publishing Group
    In:  Nature, 212 (5066). pp. 983-985.
    Details
    Publication Date: 2016-07-19
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  • 8
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    Basin-scale ocean circulation from combined altimetric, tomographic and model data (1997)
    Nature Publishing Group
    In:  Nature, 385 . pp. 618-621.
    Details
    Publication Date: 2017-02-27
    Description: The ocean stores and transports vast quantities of heat, fresh water, carbon and other materials, and its circulation plays an important role in determining both the Earth's climate and fundamental processes in the biosphere. Understanding the development of climate and important biological cycles therefore requires detailed knowledge of ocean circulation and its transport properties. This cannot be achieved solely through modelling, but must involve accurate observations of the spatio-temporal evolution of the global oceanic flow field. Estimates of oceanic flow are currently made on the basis of space-borne measurements of the sea surface, and monitoring of the ocean interior. Satellite altimetry and acoustic tomography are complementary for this purpose1, as the former provides detailed horizontal coverage of the surface, and the latter the requisite vertical sampling of the interior. High-quality acoustic-tomographic2 and altimetric3 data are now available to test the combined power of these technologies for estimating oceanic flows. Here we demonstrate that, with the aid of state-of-the-art numerical models, it is possible to recover from these data a detailed spatio-temporal record of flow over basin-scale volumes of fluid. Our present results are restricted to the Mediterranean Sea, but the method described here provides a powerful tool for studying oceanic circulation worldwide.
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  • 9
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    Salty brines on the Mediterranean sea floor (1997)
    Nature Publishing Group
    In:  Nature, 387 . pp. 31-32.
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    Publication Date: 2017-02-28
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  • 10
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    Increased El Niño frequency in a climate model forced by future greenhouse warming (1999)
    Nature Publishing Group
    In:  Nature, 398 (6729). pp. 694-697.
    Details
    Publication Date: 2021-02-25
    Description: The El Niño/Southern Oscillation (ENSO) phenomenon is the strongest natural interannual climate fluctuation1. ENSO originates in the tropical Pacific Ocean and has large effects on the ecology of the region, but it also influences the entire global climate system and affects the societies and economies of manycountries2. ENSO can be understood as an irregular low-frequency oscillation between a warm (El Niño) and a cold (La Niña) state. The strong El Niños of 1982/1983 and 1997/1998, along with the more frequent occurrences of El Niños during the past few decades, raise the question of whether human-induced 'greenhouse' warming affects, or will affect, ENSO3. Several global climate models have been applied to transient greenhouse-gas-induced warming simulations to address this question4, 6, but the results have been debated owing to the inability of the models to fully simulate ENSO (because of their coarse equatorial resolution)7. Here we present results from a global climate model with sufficient resolution in the tropics to adequately represent the narrow equatorial upwelling and low-frequency waves. When the model is forced by a realistic future scenario of increasing greenhouse-gas concentrations, more frequent El-Niño-like conditions and stronger cold events in the tropical Pacific Ocean result
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  • 11
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    Eddy-induced enhancement of primary production in a model of the north Atlantic Ocean (1998)
    Nature Publishing Group
    In:  Nature, 394 . pp. 266-269.
    Details
    Publication Date: 2019-02-27
    Description: In steady state, the export of photosynthetically fixed organic matter to the deep ocean has to be balanced by an upward flux of nutrients into the euphotic zone1. Indirect geochemical estimates2 of the nutrient supply to surface waters have been substantially higher than direct biological and physical measurements3, particularly in subtropical regions. A possible explanation for the apparent discrepancy is that the sampling strategy of the direct measurements has under-represented episodic nutrient injections forced by mesoscale eddy dynamics, whereas geochemical tracer budgets integrate fluxes over longer time and space scales. Here we investigate the eddy-induced nutrient supply by combining two methods potentially capable of delivering synoptic descriptions of the ocean's state on a basin scale. Remotely sensed sea-surface height data from the simultaneous TOPEX/Poseidon and ERS-1 satellite missions are assimilated into a numerical eddy-resolving coupled ecosystem–circulation model of the North Atlantic Ocean. Our results indicate that mesoscale eddy activity accounts for about one-third of the total flux of nitrate into the euphotic zone (taken to represent new production) in the subtropics and at mid-latitudes. This contribution is not sufficient to maintain the observed primary production in parts of the subtropical gyre, where alternative routes of nitrogen supply will have to be considered.
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  • 12
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    Cooling the tropics (1995)
    Nature Publishing Group
    In:  Nature, 376 (6537). pp. 212-213.
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    Publication Date: 2016-06-16
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  • 13
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    Ecology: Competition and coexistence (1999)
    Nature Publishing Group
    In:  Nature, 402 . pp. 366-367.
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    Publication Date: 2017-02-28
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  • 14
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    Flavodoxin as an in situ marker for iron stress in phytoplankton (1996)
    Nature Publishing Group
    In:  Nature, 382 . pp. 802-805.
    Details
    Publication Date: 2017-02-27
    Description: A fundamental issue in marine science is the identification of the factors controlling biological uptake of CO2, in high-nitrate, low-chlorophyll regions. A recent in situ iron fertilization experiment demonstrated that iron limitation is responsible for low phytoplankton stocks in the equatorial Pacific4. Here we show that flavodoxin, a biochemical marker of iron limitation, can be used to map the degree of iron stress in natural populations. Flavodoxin assays along a 900-km east-west transect in the northeastern subarctic Pacific revealed a pronounced increase in iron stress in the region west of the 135° W meridian. Addition of dissolved iron alleviated this stress. Immunostaining of single cells from the most western station showed that flavodoxin is present specifically within the chloroplasts of diatoms. Our approach provides a rapid means of defining the extent of iron stress in the ocean5 and supports the hypothesis that diatoms are iron stressed in the northeast Pacific.
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  • 15
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    Growth limits on phytoplankton (1995)
    Nature Publishing Group
    In:  Nature, 373 . p. 28.
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    Publication Date: 2017-02-27
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  • 16
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    Seismic and geochemical evidence for large-scale mantle upwelling beneath the eastern Atlantic and western and central Europe (1995)
    Nature Publishing Group
    In:  Nature, 374 . pp. 34-39.
    Details
    Publication Date: 2017-02-27
    Description: Seismic tomography and the isotope geochemistry of Cenozoic volcanic rocks suggest the existence of a large, sheet-like region of upwelling in the upper mantle which extends from the eastern Atlantic Ocean to central Europe and the western Mediterranean. A belt of extension and rifting in the latter two areas appears to lie above the intersection of the centre of the upwelling region with the base of the lithosphere. Lead, strontium and neodymium isotope data for all three regions converge on a restricted composition, inferred to be that of the upwelling mantle.
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  • 17
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    Sex in giant squid (1997)
    Nature Publishing Group
    In:  Nature, 389 (6652). pp. 683-684.
    Details
    Publication Date: 2021-02-15
    Description: Recent captures of two female giant squid ( Architeuthis ) off southern Australia have provided the first record of a mated female specimen of these almost mythical deepsea creatures. We found sperm packages (spermatophores) embedded within the skin of both ventral arms of the larger of the two specimens. It seems that male giant squids may use their muscular elongate penis to ‘inject’ sperm packages under pressure directly into the arms of females.
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  • 18
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    Deep-breathing cephalopods? (1996)
    Nature Publishing Group
    In:  Nature, 384 (6608). p. 421.
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    Publication Date: 2021-08-20
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  • 19
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    Penguins disturbed by tourists (1995)
    Nature Publishing Group
    In:  Nature, 376 (6538). pp. 301-302.
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    Publication Date: 2018-08-15
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  • 20
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    Contribution of Southern Ocean surface-water stratification to low atmospheric CO2 concentrations during the last glacial period (1997)
    Nature Publishing Group
    In:  Nature, 389 . pp. 929-935.
    Details
    Publication Date: 2018-01-09
    Description: The nitrogen-isotope record preserved in Southern Ocean sediments, along with several geochemical tracers for the settling fluxes of biogenic matter, reveals patterns of past nutrient supply to phytoplankton and surface-water stratification in this oceanic region. Areal averaging of these spatial patterns indicates that reduction of the CO2 'leak' from ocean to atmosphere by increased surface-water stratification south of the Polar Front made a greater contribution to the lowering of atmospheric CO2 concentration during the Last Glacial Maximum than did the increased export of organic carbon from surface to deep waters occurring further north.
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  • 21
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    The internal structure of an active sea-floor massive sulphide deposit (1995)
    Nature Publishing Group
    In:  Nature, 377 (6551). pp. 713-716.
    Details
    Publication Date: 2017-02-27
    Description: THE hydrothermal circulation of sea water through permeable ocean crust results in rock–water interactions that lead to the formation of massive sulphide deposits. These are the modern analogues of many ancient ophiolite-hosted deposits1–4, such as those exposed in Cyprus. Here we report results obtained from drilling a series of holes into an actively forming sulphide deposit on the Mid-Atlantic Ridge. A complex assemblage of sulphide–anhydrite–silica breccias provides striking evidence that such hydrothermal mounds do not grow simply by the accumulation of sulphides on the sea floor. Indeed, the deposit grows largely as an in situ breccia pile, as successive episodes of hydrothermal activity each form new hydrothermal precipitates and cement earlier deposits. During inactive periods, the collapse of sulphide chimneys, dissolution of anhydrite, and disruption by faulting cause brecciation of the deposit. The abundance of anhydrite beneath the present region of focused hydrothermal venting reflects the high temperatures ( 〉 150 °C) currently maintained within the mound, and implies substantial entrainment of cold sea water into the interior of the deposit. These observations demonstrate the important role of anhydrite in the growth of massive sulphide deposits, despite its absence in those preserved on land.
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  • 22
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    Possible predictability in overflow from the Denmark Strait (1999)
    Nature Publishing Group
    In:  Nature, 397 . pp. 243-246.
    Details
    Publication Date: 2017-02-28
    Description: The overflow and descent of cold dense water from the Denmark Strait sill-a submarine passage between Greenland and Iceland-is a principal means by which the deep ocean is ventilated, and is an important element in the global thermohaline circulation. Previous investigations of its variability-in particular, direct current measurements(1,2) in the overflow core since 1986-have shown surprisingly little evidence of long-term changes in now speed. Here we report significant changes in the overflow characteristics during the winter of 1996-97, measured using two current-meter moorings and an inverted echo sounder located at different depths in the fastest part of the now. The overflow warmed to the highest monthly value yet recorded (2.4 degrees C), and showed a pronounced slowing and thinning at its lower margin. We believe that the extreme warmth of the overflow caused it to run higher on the continental slope off east Greenland, so that the lower current meters and the echo sounder were temporarily outside and deeper than the fast-flowing core; model simulations appear to confirm this interpretation, We suggest that the extreme warmth of the overflow is a lagged response to a warming upstream in the Fram Strait three years earlier (caused by an exceptional amplification of the winter North Atlantic Oscillation). If this is so, over-now characteristics may be predictable.
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  • 23
    Electronic Resource
    Electronic Resource
    Defining protein interactions with yeast actin in vivo (1995)
    [s.l.] : Nature Publishing Group
    Nature structural biology 2 (1995), S. 28-35 
    Details
    ISSN: 1072-8368
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Using the two-hybrid protein interaction reporter system, actin, profilin, Srv2p and two SH3-containing proteins are found to bind yeast actin in vivo. When tested for ability to interact with 35 actin mutations distributed over the monomer surface, distinct subsets of mutations characteristic for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsb0195-28
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  • 24
    Electronic Resource
    Electronic Resource
    The allosteric ligand site in the V max -type cooperative enzyme phosphoglycerate dehydrogenase (1995)
    [s.l.] : Nature Publishing Group
    Nature structural biology 2 (1995), S. 69-76 
    Details
    ISSN: 1072-8368
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The crystal structure of the phosphoglycerate dehydrogenase from Eschehchia coli is unique among dehydrogenases. It consists of three clearly separate domains connected by flexible hinges. The tetramer has approximate 222 symmetry with the principal contacts between the subunits forming between ...
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    URL: http://dx.doi.org/10.1038/nsb0195-69
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  • 25
    Electronic Resource
    Electronic Resource
    Neutron diffraction analysis of the solvent accessible volume in cubic insulin crystals (1995)
    [s.l.] : Nature Publishing Group
    Nature structural biology 2 (1995), S. 77-80 
    Details
    ISSN: 1072-8368
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The average contact distance between protein and solvent surface atoms in cubic insulin crystals has been determined from two sets of 15 Å resolution neutron diffraction data. A contact distance between the water hydrogen sites and the protein surface that is significantly shorter than the ...
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    URL: http://dx.doi.org/10.1038/nsb0195-77
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  • 26
    Electronic Resource
    Electronic Resource
    Unusual Prime Number Sequences (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1164-1164 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We shall throw some light on the mystery of the abundance of prime numbers in these series. When an arbitrary number is divided by a prime number g, the remainder can have any one of q values from 0 to (q I). In series of the kind considered here, however, one finds only 1/2(q+ 1) different ...
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    URL: http://dx.doi.org/10.1038/2141164b0
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  • 27
    Electronic Resource
    Electronic Resource
    Speech Communication in Very Noisy Environments (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1164-1164 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The speech signals used consisted of readings (male voice) from various forms of literature, including newspapers and technical matter, and the aim was to assess communication, rather than intelligibility of single words or sounds. The speech was recorded on tape and passed through a filter of ...
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  • 28
    Electronic Resource
    Electronic Resource
    Proteins for Protection (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1166-1166 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE proceedings of a symposium on the immunological properties of protein hormones held in Rome three years ago have now been published. The impetus for the marked progress which has been made in this field in recent years was provided by the need for reliable and practicable methods for the ...
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    URL: http://dx.doi.org/10.1038/2141166a0
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  • 29
    Electronic Resource
    Electronic Resource
    Human Groups (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1166-1167 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS book presents the papers given and summarizes the ensuing discussions at a Ciba Foundation Symposium on Caste and Race held in 1966. Without doubt it is of considerable interest to social scientists, including anthropologists, sociologists, social psychologists, students of social change and ...
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  • 30
    Electronic Resource
    Electronic Resource
    Fossils upon Fossils (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1167-1167 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT is twenty-two years since the second edition of Vertebrate Paleontology. During that time there have been spectacular advances in the palaeontology of almost all vertebrate classes. Many new fossils have been found and the descriptions of these, together with re-evaluations of many others, have ...
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  • 31
    Electronic Resource
    Electronic Resource
    Index of Absorption Spectra (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1167-1168 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOR several years Dr. Hirayama has been collecting and classifying the published ultra-violet and visible absorption data of organic compounds for inclusion in a twenty-five volume Comprehensive System of Organic Chemistry, which was published in Tokyo. He has now brought together in one volume the ...
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  • 32
    Electronic Resource
    Electronic Resource
    High Flying Survey (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1169-1169 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THESE two volumes comprise papers, or abstracts of papers, read at the Seventh International Space Science Symposium in May 1966. The first volume incorporates papers on interactions between the neutral and ionized parts of the atmosphere, together with some on the latest significant result on the ...
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    URL: http://dx.doi.org/10.1038/2141169a0
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  • 33
    Electronic Resource
    Electronic Resource
    How to Make Compounds (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1170-1170 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS is a valuable compilation of references, including those from the patent literature, to organo-transition-metal compounds described from 1937 to 1964 inclusive. The mono- and di-metallic compounds considered are those with organic groups with at least one carbon-metal ff-bond and those with ...
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    URL: http://dx.doi.org/10.1038/2141170a0
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  • 34
    Electronic Resource
    Electronic Resource
    Lasers in Translation (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1169-1169 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE recent burst of publication of books on lasers is added to by this English translation of the original Czech edition first published in 1964. Although described by the publishers as being intended for the specialist working with lasers or their applications, the contents and presentation are ...
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    Artist's Life (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1171-1171 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] No one could have predicted, before he reached his mid-thirties, that J. J. Audubon would become America's most famous bird artist. He was hopelessly spoiled as a child, and in his twenties and early thirties lost all his own money, and much of other people's, in one impractical business scheme ...
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    Erratum (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1172-1172 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Throughout the communication entitled "Response of Pines irradiated with Lethal and Sublethal Doses of y-Radiation" by J. P. OKunewick and S. E. Herrick (Nature, 214, 514; 1967) the unit "rad" should be changed to "r." (roentgen). The sixth sentence of the third paragraph should read: "One of these ...
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    Development of Epileptic Seizures through Brain Stimulation at Low Intensity (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1020-1021 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Herberg and Watkins showed that repeated bursts of sub-cortical electrical stimulation in rats will elicit a convulsion early in a given session, but subsequent bursts of electrical stimulation will not cause convulsions until 1 or 2 h have elapsed after that initial convulsion. They did not ...
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    Delayed-type Skin Sensitivity to Human Encephalitogen in Experimental Allergic Encephalomyelitis (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1021-1022 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Wilkie et al.6, then Shaw et al.7, have reported that delayed-type skin reactions to homologous encephalitogenic proteins may be elicited in guinea-pigs during induction of acute EAE. The reactions resemble tuberculin reactions and occur maximally 9-13 days after the original sensitization. The ...
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    Plant Regulators alter Translocation of Photosynthetic Products (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1024-1025 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In 1965 and 1966 we used potted vines of Vitis vinifera L. to determine the effects of a kinin and other types of plant regulators on translocation patterns of elaborated food materials. The normal translocation pattern of assimilate of young grape shoots shows that most of the shoot tip is ...
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    Nature of the Aldolase Activity in a Unicellular Red Alga (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1028-1029 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] P. cruentum (Vischer strain) was obtained in axenic condition from Dr F. T. Haxo (Scripps Institute of Oceanography, La Jolla, California) and was grown photoautotrophically in mass culture7. Algal acetone powders8 and their phosphate buffer (0.05 molar, pH 7.5) extracts (from 16 h extraction at ...
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    Tissue Culture of Oats (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1029-1030 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. EFFECT OF GROWTH REGULATORS ON CALLUS INDUCTION 24D Kinetin (μmoles/1.) μmoles/1.) 0 0-23 0-46 4-6 46 0 0-45 2-25 4-5 22-5 45 225 ± + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + ± ± + IAA (μmoles/1.) 0 5-7 28-5 57 ...
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    Activation of the Prothoracic Glands of Antheraea polyphemus (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1032-1034 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The pupae of Antheraea polyphemus (Lepidoptera) used in these experiments were grown on maple trees in Connecticut during the summer of 1965, and were collected soon after pupation (between August 15 and September 15). Immediately after collection, all pupae were exposed for 21 days to a ...
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    Resting Stage in the Reproductive Cycles of Gammarus (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1034-1034 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] During the past few years this mechanism has been studied in several marine amphipods of the intertidal region (Gammarus duebeni, G. oceanicus, G. setosus and Marinogammarus obtusatus) both in the field and in the laboratory. More detailed accounts of the reproductive cycles and their relationship ...
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    Loss of Photorepair Ability in Conidia of Neurospora crassa (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1016-1017 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The purpose of this note is to examine various suggestions concerning the mechanism of the loss of photo-repair ability and to indicate the lines along which a solution is more likely to be attained. The two essential components of the system are (A) the photorepair mechanism which is made up of ...
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    Genetically Determined Electrophoretic Variant of the Human Complement Component C′3 (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1042-1043 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Polymorphism of this protein has not been described in man, but we recently found several members, in a family of Flemish stock (pedigree on Fig. 1), showing an electrophoretic split of this protein. Routine separation of fresh serum of the affected individuals (agar gel electrophoresis, with 1 per ...
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    Estimation of Steroid Hormones by an Immunochemical Technique (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1044-1045 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The analytical methods now applied to the assay of plasma steroids utilize either fluorimetry2, gas chromato-graphy3, or the "double isotope" technique4. They are capable of assaying quantitatively progesterone, testosterone and oestrogens at levels as low as about 0.02 mg in 50 ml. of plasma after ...
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    Effects of 2 : 4-Dichlorophenoxyacetic Acid on Enzyme Systems in Jerusalem Artichoke Tubers and Chicory Roots (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1049-1050 
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    Notes: [Auszug] For this purpose disks were cut from Jerusalem artichoke tubers and chicory roots and treated with 10-5 molar 2 : 4-dichlorophenoxyacetic acid (2 : 4-D) or with water for 3 days at 25 C. The activity of the extracted hydrolytic enzymes was assessed for both treatments and compared with that ...
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    Characterization of Antilymphocytic Antibody (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1052-1053 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] All sera were inactivated at 56 C for 30 min before further treatment. Separation into the 19S, 7S, 4.5S size classes (and an intermediate class, 10S) was accomplished by filtration on Sephadex gel at 4 C as described by Flodin and Killander4, using 17-20 ml. serum volumes on Sephadex G-200 columns ...
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    Learning and Memory in Baboons with Bilateral Lesions of Frontal or Inferotemporal Cortex (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1054-1056 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the present experiment, a multi-object visual discrimination task tested Oxbury?s prediction that increasing the number of distracting stimuli in problems not requiring a delayed response would nevertheless produce a progressive learning impairment in the frontal animal. Because frontal lesions ...
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    Importance of Being Human (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1057-1058 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE history of experimental cancer research up to now has tended to be that of tumours in experimental animals. The reason is clear; the accessibility of human material to the average research worker is limited and the handling of this material has presented great difficulties; and indeed it does ...
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    Formation of Nucleic Acid Coacervates by Dehydration and Rehydration (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1038-1040 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nucleic acid from yeast (Anachemia) was mixed in water in various concentrations (10, 1, 0.5, 0.1, mg/ml.) at room temperature and filtered on Whatman No. 1 filter paper. A drop of the solution was then placed on a microscope slide and observed without a cover glass. Coacervates 5 to 20µ in ...
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    Non-exchangeable Calcium in Human Urine (1967)
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    Nature 214 (1967), S. 1045-1046 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have repeated this experiment, using the same experimental conditions and similar methods of estimating calcium, namely flame photometry and titration with ethylenediamine tetraacetic acid (EDTA) with murexide-as indicator2. These procedures yielded values for non-exchangeable calcium which were ...
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    Professor T. S. Moore (1967)
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    Nature 214 (1967), S. 1063-1063 
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    Notes: [Auszug] TOM SIDNEY MOORE was born in Islington in 1881 and attended the local church school, from whence he gained a scholarship to the East London College. He derived intense pleasure from his undergraduate training and regarded this period as the real start of his mind?s development. By the age of ...
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    Erratum (1967)
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    Nature 214 (1967), S. 1064-1064 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The price of The Culture of Vertebrate Embryos, reviewed in Nature, 214, 855; 1967, is 60s. and not 112s. as ...
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    Appointments Vacant (1967)
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    Nature 214 (1967), S. 1065-1065 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] APPLICATIONS are invited for the following appointments on or before the dates mentioned : JUNIOR FELLOW IN ORGANIC CHEMISTRY?The Registrar, University Senate House, Bristol, 2 (June 7). DEMONSTRATOR (holding, or expecting to obtain, a good honours degree in chemistry or biochemistry, and ...
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    Forthcoming Events (1967)
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    Nature 214 (1967), S. 1065-1065 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] (Meetings marked with an asterisk are open to the public) Tuesday, June 6 CONCRETE SOCIETY, PRESTRESSED CONCRETE COMMITTEE (at Church House, Great Smith Street, Westminster, London, S.W.I), at 9.15 a.m.? Meeting on ?The Design of Prestressed Concrete Bridge Structures?, opened by Mr Stephen ...
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    Changes at Teddington (1967)
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    Nature 214 (1967), S. 960-960 
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    Notes: [Auszug] THE National Physical Laboratory seems to have survived the constitutional re-shuffle which has occurred since the advent of the Ministry of Technology. Theannual report for 1966 (HMSO, £1.5) gives details of exactly what has happened, which amounts in the first place to the creation of a ...
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    Brain Drain Bibliography (1967)
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    Nature 214 (1967), S. 961-961 
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    Notes: [Auszug] THE unit on research policy at the University of Lund has just published a bibliography of 415 items culled from the literature of 40 countries and concerned with problems of the migration of scientists and technologists. The document, Brain Drain and Brain Gain, is intended ?as a source of ...
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    Profits for Some (1967)
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    Nature 214 (1967), S. 962-962 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IF dissatisfaction with past performance were any guarantee of improvement, advanced British industries would have little to worry about. The latest tocome under critical examination is the low temperature industry in Britain, which is concerned with such things as superconducting magnets, ...
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    Featuring Ferroelectrics (1967)
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    Nature 214 (1967), S. 1062-1062 
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    Notes: [Auszug] FEKROELECTRICITY is a rapidly advancing subject. Every year new ferroelectrics are discovered and new types of ferroelectric behaviour shown to exist, either in the newly discovered ferroelectrics or in the old and well-known ones. In these circumstances the publishing from time to time either of ...
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    Erratum (1967)
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    Nature 214 (1967), S. 1064-1064 
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    Notes: [Auszug] The communication entitled ?New Vasoconstrictor, Bovine Peptide-B, released during Blood Coagulation? by Robert W. Colman, Albert J. Osbahr and Russell E.Morris, jun., which appears on page 1040 of this issue is incomplete and should be disregarded. The complete communication will appear in a later ...
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    Corrigendum (1967)
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    Nature 214 (1967), S. 1064-1064 
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    Notes: [Auszug] In the article entitled ?Metabolic Pathways of Red Blood Cell Copper in Normal Humans and in Wilson?s Disease? (Nature, 213, 775; 1967) the following changes should be made: line 53 (l.h.s.) p. 776 to ?and a normal rate of incorporation of copper-64 . . .?; line 2 (l.h.s.) p. 777 to ?counting it in ...
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    Reports and other Publications (1967)
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    Nature 214 (1967), S. 1066-1066 
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    Notes: [Auszug] (not included in the monthly Books Supplement) Great Britain and Ireland The Ciba Foundation for the Promotion of International Co-operation in Medical and Chemical Research, 1966 Report. Pp. 70. (London: The Ciba Foundation, 1967.) [203 B.B.C. Engineering Monograph No. 66: V.H.F. Aerial Gain ...
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    Technology Gap Again (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 957-959 
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    Notes: [Auszug] EUROPEAN views about the phenomenon unfortunately called the technology gap are rapidly becoming more rational, and the meeting of the European Round Table in Turin last week will have helped a great deal. The address by Dr A. C.Copisarow, the substance of which appears on page 966, is one example ...
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    Water for Peace? (1967)
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    Nature 214 (1967), S. 959-959 
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    Notes: [Auszug] THE international conference under the general heading of ?Water for Peace? which has just ended in Washington has understandably been a little less dramatic and decisive than its sponsors may have hoped, but that does not mean that nothing has been accomplished. The origin of the occasion seems to ...
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    Technology for Puerto Rico (1967)
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    Nature 214 (1967), S. 961-961 
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    Notes: [Auszug] A CHALLENGING view of how technology may be able to transform the condition of Puerto Rico has been produced by a committee of the US National Research Council of the National Academy of Sciences and the National Academy of Engineering under Dr John C. Warner of the Carnegie Institute of ...
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    Computer Catalogue (1967)
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    Nature 214 (1967), S. 961-962 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] A CONTRACT for the development of library catalogues in machine readable form has been placed with the University of Newcastle upon Tyne by the Office for Scientific and Technical Information. The office is proposing to contribute £12,500 towards the cost of a two year project being ...
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    Don't Spare the Rod (1967)
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    Nature 214 (1967), S. 962-963 
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    Notes: [Auszug] IT almost looks as if the conference of the National Association of Head Teachers which took place in Scarborough last week was an elaborate joke. The teachers, after all, are in charge of British state schools, and responsible for putting into practice the modestly radical proposals for ...
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    Co-operative Reactor (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 963-963 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] JAPAN has decided to join the current research programme of the OECD reactor at Halden in Norway. The reactor, which is under the control of the European Nuclear Energy Agency, is a boiling heavy water reactor used as a test facility by a large number of countries including Norway, Austria, ...
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    More about Aldabra (1967)
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    Nature 214 (1967), S. 965-965 
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    Notes: [Auszug] THE war between the Royal Society and the British Ministry of Defence over the proposed airfield on the island of Aldabra in the Indian Ocean has persuaded the Royal Society to take the unusual step of sending a delegation to the ministry to plead the case for the total preservation of the island. ...
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    Asking for More (1967)
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    Nature 214 (1967), S. 964-964 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE Ministry of Technology seems to be relaxing its guidelines on grants to research associations. Already it has arranged to give the British Welding Research Association thirty shillings for every pound that the association canraise from its members instead of the usual pound for pound ...
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    Occipital Alpha Rhythm Eye Position and Lens Accommodation (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 975-977 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] People can be taught to control voluntarily their own alpha rhythms. This can be used to send messages in Morse code when an electroencephalogram pattern is used as part of a computer programme. Such procedures may help to explain the mechanisms by which the alpha rhythm is “blocked” or ...
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    Size Fractionation of Exponentially Growing Escherichia coli (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 983-986 
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    Notes: [Auszug] A new method for differentiating between bacteria of different sizes in a single population is used to show that the rate of synthesis of RNA in a population of Escherichia coli varies linearly with the size of the ...
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    Protein Turnover (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 869-869 
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    Notes: [Auszug] THE turnover of endogenous protein is known to be of great importance in the differentiation of micro-organisms. For one thing, it can provide raw material for the synthesis of enzymes and other proteins that will allow growth to continue in a changed environment. Then, by generating amino-acids in ...
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    Postglacial–Glacial Change in Climate in the Indian Ocean (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 873-875 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A change from a cold to a warmer climate is known to have taken place in the Northern Hemisphere 11,000 years ago. The foraminiferal faunas of deep-sea cores obtained off the south coast of Western Australia reveal that postglacial warming also occurred at about this time in the Southern ...
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    New Chance for Steel (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 863-863 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE committee set up by the Minister of Power to discuss research in the British steel industry has the heady prospect of knowing that its advice matters. One member of the committee is Dr H. M. Finniston, who will be vice-chairman in charge of research and development when the steel industry is ...
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    Rabi in Retirement (1967)
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    Nature 214 (1967), S. 863-863 
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    Notes: [Auszug] To say that Professor I.I. Rabi of Columbia University has become an institution is to do him an injustice. He is not at all like that. Even though he has been teaching for thirty-seven years at the university at which he graduated PhD, he has remained uncommonly free from pomp. His good works on ...
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    Shape of Universities (1967)
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    Nature 214 (1967), S. 865-865 
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    Notes: [Auszug] THE view that the success of the universities in Britain, the United States and Germany had inspired pressures from outside and particularly from governments was one of the themes of the Queen's Lecture delivered at the University of Belfast on May 23 by Sir Eric Ashby, Master of Clare College, ...
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    Worth a Thousand Words (1967)
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    Nature 214 (1967), S. 866-867 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] THE Board of Trade announced on May 17 new steps to make details of British patent specifications more readily available. These involve increasing the speed with which the patent abridgements are published. Abridgements, the main source of information for patent searchers, will in future be ...
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    Aggregation Formation in Three Species of Planaria: Distance to Nearest Neighbour (1967)
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    Nature 214 (1967), S. 895-896 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] Using a new method of measuring the degree of aggregation of planaria under homogeneous light conditions, it has been possible to show that planaria do indeed aggregate under these conditions and to distinguish certain differences between species in the degree of ...
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    Conversion of Single Crystals of Chlorapatite into Single Crystals of Hydroxyapatite (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 904-906 
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    Notes: [Auszug] The chemistry and preparation of hydroxyapatite, Ca10(PO4)6(OH)2, have been investigated extensively, partly because it is the prototype for the inorganic component of bones and teeth. Hydroxyapatite as normally prepared by precipitation from aqueous solutions, or by solid state reactions at about ...
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    Steroid Hormones and Monolayers (1967)
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    Nature 214 (1967), S. 888-889 
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    Notes: [Auszug] The amount of water carried by a moving monolayer of stearyl alcohol is altered by addition of electrolytes and steroid hormones to the solution under the film. This is believed to be due to a change in the properties of water immediately adjacent to the ...
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    Micro-organisms adapted to High Temperatures (1967)
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    Nature 214 (1967), S. 882-885 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Blue-green algae can grow in hot springs at temperatures of 50°–75° C. In algae taken from hot springs in the Yellowstone National Park, photosynthesis has now been shown to be most efficient at the temperature of the ...
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    Morphological Transformation of Mouse Embryo Cells in vitro by Murine Sarcoma Virus (Harvey) (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 897-898 
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    Notes: [Auszug] Murine sarcoma virus (Harvey) produces characteristic changes in cultures of C57BL mouse embryo cells. Some of the cells become spindle-shaped and stain vividly with acridine orange. The transformed cells continuously produce virus in vitro and give tumours on inoculation into adult C57BL mice. The ...
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    Rotation and the Helium Line Strengths in B Stars (1967)
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    Nature 214 (1967), S. 899-900 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This communication reports some recent investigations of the helium line strengths in B stars of the Southern galactic clusters IC 2391 and IC 2602. These observations suggest that the strength of the He λ4471 line for main sequence stars of spectral types B3 and later is almost wholly dependent on ...
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    Does a Moving Body appear Cool? (1967)
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    Nature 214 (1967), S. 903-904 
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    Notes: [Auszug] Inertial frames will be taken in "standard configuration-5; quantities measured in a centre-of-mass frame I0 will be given the suffix 0, and b( u)=[l -u2/c2]-112. (A) Ambiguities by arguing from the transverse Doppler effect. The mean occupation number of a radiation mode j is the same in the rest ...
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    Diffusion in Gels and Polymeric Solutions (1967)
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    Nature 214 (1967), S. 907-907 
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    Notes: [Auszug] Metzner's article appeared just after a study had been completed in this laboratory in which the diffusion coefficients of carbon dioxide and sulphur dioxide in aqueous solutions of carboxymethylcellulose (CMC) had been measured2,3. Unlike Metzner, we found no anomalous diffusion rates in the CMC ...
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    Metal Complexing by Tris Buffer (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 906-907 
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    Notes: [Auszug] The ion, hydroxy-aquofo'sethylenediamine cobalt(III) [A] which is stable between PH 6 and 8 reacts with a-amino-acids and peptides to form complexes B as shown: Fig.1. Absorption spectrum for [Coen2(H2O)(OH)][N03]2 (A)\ ' , absorption spectrum of (A) and tris buffer (C). Both run at pH 7-3 in ...
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    Strychnine and Cortical Inhibition (1967)
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    Nature 214 (1967), S. 914-915 
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] When administered electrophoretically strychnine has complex actions on mammalian nerve cells. Renshaw cells are excited by concentrations which exceed those adequate to block postsynaptic inhibition; with higher concentrations the extracellularly recorded action potentials are reduced in amplitude ...
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    Adjustment to Cold of the Isolated Rat Heart (1967)
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    Nature 214 (1967), S. 913-914 
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    Notes: [Auszug] The heart of the non-hibernating homeotherm is normally at a constant temperature, but here we report experiments which indicate that, when isolated, such a heart adjusts to a cold environment in a manner somewhat similar to that of the intact heart of the poikilotherm2. Fig. 1. Heart ...
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    Acute Pharmacology of Melatonin (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 919-920 
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    Notes: [Auszug] Melatonin was dissolved in propylene glycol or ethanol and further diluted with Ringer solution to give a concentration of 10-30 mg/ml. Controls in each experiment were given the same amount of organic diluent in Ringer solution. The toxicity of melatonin was studied in mice; doses up to 800 ...
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    Excretion of Thiocyanate in Osteolathyrism (1967)
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    Nature 214 (1967), S. 920-920 
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    Notes: [Auszug] It is known that, when aliphatic cyanides are metabolized in the animal body, hydrogen cyanide is split off, leading to an increase in the excretion of thiocyanates2. It was therefore thought desirable to investigate the excretion of thiocyanate in the urine of rats rendered lathyritic by the ...
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    Cytoplasmic DNA-containing Bodies and the Inheritance of Certain Cytoplasmically Determined Characters in Amoeba (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 928-929 
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    Notes: [Auszug] We have tried to determine whether or not the DNA-containing bodies in A. discoides are concerned with the hereditary determinants attributed to the cytoplasm of this species. Separate cultures of cells of each of the original strains of A. proteus (TIP) and A. discoides (T1D)1,6, of the ...
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    Concentration of Certain Myxoviruses with Polyethylene Glycol (1967)
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    Nature 214 (1967), S. 927-928 
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    Notes: [Auszug] Table 1 shows the viruses used, the method of propagation and means of assay. These viruses were precipitated from suspension in balanced salt solutions by mixing with PEG at pH. 7.4, the amount of viral activity removed from suspension being proportional to the amount of PEG in the mixture up to ...
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    Mode of Action of Chloroquine on Plasmodium berghei and P. cynomolgi (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 935-936 
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    Notes: [Auszug] In the erythrocytes of untreated animals, trophozoites of P. berghei and P. cynomolgi showed peripherally distributed malarial pigment, sometimes associated with partially digested haemoglobin, enclosed in vesicles bounded by membranes. Thirty to thirty-five minutes after the administration of the ...
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    Interaction of Growth Regulators in the Senescence of Nasturtium Leaf Disks (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 941-942 
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    Notes: [Auszug] These observations support the proposition that senescence may be a function of hormonal status, and thus any manipulations which vary the hormone content of leaf tissue may effectively alter the rate of senescence. It has been demonstrated that many of the growth retardants function by impairing ...
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    Coralloid Root Systems in Plants showing Lime-induced Chlorosis (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 943-945 
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    Notes: [Auszug] While the effects on the leaves are obvious and have received considerable attention, the grafting experiments of Brown, Holmes and Tiffin8 showed that in races of soybean resistant and susceptible to chlorosis the root-stock, and not the shoot, determined whether or not the species was ...
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    Lubricant Entrapment between Approaching Elastic Solids (1967)
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    Nature 214 (1967), S. 947-948 
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    Notes: [Auszug] Christensen1 examined theoretically the problem of an elastohydrodynamic film between approaching cylinders, in some earlier work in this department. He predicted that the fluid film pressures could reach very high values, often in excess of the Hertzian maximum pressure of dry contact, and that ...
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    Inviscid Flow (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 950-950 
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    Notes: [Auszug] THIS book was originally published in Moscow in 1961 and contains a systematic treatment of the theory of jets in inviscid fluids. It has already been widely acclaimed as an important major work and will be familiar to many English language readers through an earlier translation published by the ...
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    Fall in Critical Flicker Frequency associated with Adaptation to Intermittent Light (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 947-947 
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    Notes: [Auszug] The results were submitted to analysis of variance and the table of means is given in Table 1. As has previously been shown4,5, there was a significant difference between the mean ascending and descending thresholds, and between mean thresholds after exposure to 25 and 50 c/s. There was no ...
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