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  • Nature Publishing Group  (29,690)
  • American Physical Society (APS)
  • 1995-1999  (12,082)
  • 1980-1984  (17,608)
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  • 1
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    Nature Publishing Group
    In:  Nature, 377 (6545). p. 107.
    Publication Date: 2017-07-04
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  • 2
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    Nature Publishing Group
    In:  Nature, 374 (6520). p. 314.
    Publication Date: 2017-07-06
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  • 3
    Publication Date: 2016-04-11
    Description: There has been concern about recent temperature trends and the future effects of CO2 concentrations in the atmosphere1,2; but instrumental records only cover a few decades to a few centuries and it is essential that proxy data sources, such as pollen spectra from peats and lake sediments, be carefully interpreted as climate records. Several workers have shown statistically significant associations between the modern pollen rain and climatic parameters, an approach that by-passes the recognition of pollen/vegetation units. Statistically defined equations that associate abiotic and biotic elements are called transfer functions. We report here on the application of transfer function equations to nine middle and late Holocene peat and lake sediment sequences from northern Canada (Fig. 1).
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  • 4
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    Nature Publishing Group
    In:  Nature, 288 (5788). pp. 260-263.
    Publication Date: 2016-03-01
    Description: Organic detritus passing from the sea surface through the water column to the sea floor controls nutrient regeneration, fuels benthic life and affects burial of organic carbon in the sediment record. Particle trap systems have enabled the first quantification of this important process. The results suggest that the dominant mechanism of vertical transport is by rapid settling of rare large particles, most likely of faecal pellets or marine snow of the order of 〉200 μm in diameter, whereas the more frequent small particles have an insignificant role in vertical mass flux4–6. The ultimate source of organic detritus is biological production in surface waters of the oceans. I determine here an empirical relationship that predicts organic carbon flux at any depth in the oceans below the base of the euphotic zone as a function of the mean net primary production rate at the surface and depth-dependent consumption. Such a relationship aids in estimating rates of decay of organic matter in the water column, benthic and water column respiration of oxygen in the deep sea and burial of organic carbon in the sediment record.
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  • 5
    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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  • 6
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    Nature Publishing Group
    In:  Nature, 382 (6589). pp. 344-346.
    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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  • 7
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    Nature Publishing Group
    In:  Nature, 397 (6718). pp. 389-391.
    Publication Date: 2015-07-16
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  • 8
    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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  • 9
    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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  • 10
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    Nature Publishing Group
    In:  Nature, 387 . pp. 31-32.
    Publication Date: 2017-02-28
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  • 11
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    Nature Publishing Group
    In:  Nature, 300 (5889). pp. 245-246.
    Publication Date: 2018-03-08
    Description: A subtropical front was observed in the area south and southeast of the Azores during cruises of FS Meteor and FS Poseidon in early 1982. The front has a basically west–east extension, with considerable meandering observed. Meso-scale eddies are found on both sides. The overall flow pattern corresponds to earlier results on geopotential differences in the upper northeast Atlantic, but the baroclinic transport of the order of 107 m3 s−1 is found to be concentrated in a 60-km wide jet. We suggest here that the current band is part of the gyre circulation, resulting from a branching of the North Atlantic Current.
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  • 12
    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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  • 13
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    Nature Publishing Group
    In:  Nature, 394 . pp. 266-269.
    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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  • 14
    Publication Date: 2019-01-21
    Description: Circumpolar surface waters dominate the circulation of the Southern Ocean and sustain one of the ocean's largest standing stocks of biomass thereby producing a significant output of biogenic components, mainly diatoms, to the bottom sediments. Generally transit of biogenic matter from the sea surface to the sea floor affects nutrient regeneration fuels benthic life and transfers signals to the sediment record1–5. Reliable quantification of the relationship between biological production, fractionation of skeletal and tissue components and bottom sediment accumulation depends on direct vertical flux measurements from sediment trap deployments6–9, which have proved to be most scientifically productive10–13. We now present data on vertical mass fluxes from the Southern Ocean and evidence for strong biogeochemical fractionation between organic carbon-, nitrogen- and phosphorus-containing compounds, siliceous and calcareous skeletal remains, and refractory aluminosilicates.
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  • 15
    Publication Date: 2016-09-02
    Description: Analysis of aeolo-marine dust deposits in the subtropical eastern Atlantic enables the strength of the major wind patterns during the late Quaternary to be evaluated and gives an insight into the climate of North Africa.
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  • 16
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    Nature Publishing Group
    In:  Nature, 376 (6537). pp. 212-213.
    Publication Date: 2016-06-16
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  • 17
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    Nature Publishing Group
    In:  Nature, 402 . pp. 366-367.
    Publication Date: 2017-02-28
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  • 18
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    Nature Publishing Group
    In:  Nature, 382 . pp. 802-805.
    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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  • 19
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    Nature Publishing Group
    In:  Nature, 373 . p. 28.
    Publication Date: 2017-02-27
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  • 20
    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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  • 21
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    Nature Publishing Group
    In:  Nature, 287 (5783). pp. 628-630.
    Publication Date: 2016-11-15
    Description: Statoliths of cephalopods are small, hard calcareous stones which lie within the cartilaginous skulls of octopods, sepioids and teuthoids1. Fossil statoliths, clearly belonging to genera which are alive today, have previously been described from 11 Cenozoic deposits spanning from the Eocene to the Pleistocene in North America2–5. Such statoliths are of particular interest because they provide a means of studying the evolution of living cephalopod groups which have no calcareous shells, including the cosmopolitan and numerous teuthoids and octopods. Here, the first cephalopod statoliths to be recognized in European deposits are described and identified as Loligo sp. They are compared with the North American fossil Loligo species and statoliths removed from the two living Loligo species of Europe.
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  • 22
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    Nature Publishing Group
    In:  Nature, 305 (5933). pp. 403-407.
    Publication Date: 2016-11-23
    Description: Basalts from the Reykjanes Ridge contain noble gases delivered from the non-degassed lower mantle by the Iceland plume. These lower mantle gases are thought to be a mixture of planetary and solar components, as would be expected if the Earth accreted from fine silicate particles.
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  • 23
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    Nature Publishing Group
    In:  Nature, 389 (6652). pp. 683-684.
    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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  • 24
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    Nature Publishing Group
    In:  Nature, 384 (6608). p. 421.
    Publication Date: 2021-08-20
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  • 25
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    Nature Publishing Group
    In:  Nature, 376 (6538). pp. 301-302.
    Publication Date: 2018-08-15
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  • 26
    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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  • 27
    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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  • 28
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    Nature Publishing Group
    In:  Nature, 397 . pp. 243-246.
    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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  • 29
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    In:  Nature, 303 (5916). pp. 422-423.
    Publication Date: 2019-04-16
    Description: Strandings of the giant squid, Architeuthis monachus (Steen-strup), have always stirred attention because of the rarity and enormous size of these cephalopods. These animals have never been observed in their natural habitat and little is known about their physiology and ecology. Stranding of giant squids in Newfoundland waters has been correlated with the inflow of warm water, suggesting that increased temperature may be causing their death1. Squids have also been carried to the Norwegian coast with the warm North Atlantic current2 and on 23 August 1982 a live specimen was caught off Radöy near Bergen, Norway (Fig. 1). This catch gave an unprecedented opportunity to study the effects of temperature on the oxygen binding properties of blood from the giant squid. The present finding of an excess of a fourfold decrease in O2 affinity when temperature is increased from 6.4 to 15°C strongly suggests that giant squids may suffocate from arterial desaturation when increased ambient temperatures are experierced.
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  • 30
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    Publication Date: 2024-06-06
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  • 31
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 113-113 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A PAPER by Newman on page 155 of this issue documents a striking property of the glial cells in the vertebrate retina: their membrane permeability, which is almost exclusively a permeability to potassium, is largely concentrated at the end which has membrane expansions ('endfeet') facing the ...
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  • 32
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 107-107 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] 12-Month 12-Month Company Close Close Change high low previous 30 April month 14 101/2 Biogen (Switzerland) 13 U3/4 -2 VA 2 1% Bio-Logicals (Canada) 1% P/4 + % 14% 10 % Bio-Response (USA) 11 13% + 2% 14 10'/4 Cetus ...
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  • 33
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 108-108 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR ? We have read the news item in Nature (1 March p.6) regarding the inability of Israeli scientists to attend the VIIth International Biotechnology Symposium. To put the record straight, the organizers did everything possible to help the scientists from Israel to attend the symposium. In fact, ...
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  • 34
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 108-108 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR ? In Nature of 2 February (307, 408; 1984) you printed a letter from Dr J. Stefan Roken calling on scientists to boycott the International Biotechnology Symposium held in New Delhi in February, and calling for protests against the Indian Government for not permitting scientists from all ...
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  • 35
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 575-575 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE UK Natural Environment Research Council (NERC) has decided that there is a prima facie case for closing the Taunton site of the Institute of Ocanographie Sciences (IOS), which carries out research in sedimentation and applied wave mechanics. The council's governing body was due this week to ...
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  • 36
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 575-575 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE limit for nitrogen oxides in ambient air proposed in the EEC directive (Nature 308, 309; 1984) should have read 200 gnr3 not ...
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  • 37
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 576-576 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tokyo A PAIR of headphones and a portable cassette player have become pretty much standard street wear for young Tokyoites, but they are creating a new problem for the Japanese Government how to dispose safely of the batteries that power them. Alkaline-manganese batteries have been favoured ...
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  • 38
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 576-576 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CHINESE plans to act as a "nuclear dustbin" for Western countries have provoked a sharp reaction in the neighbouring Mongolian People's Republic. Alarm was crystallized last month in a formal interview, organized by the Soviet news agency TASS and its Mongolian equivalent Mont same, with a ...
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  • 39
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 576-576 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Washington AMID continuing uncertainty about the health of Soviet physicist Andrei Sakharov and his wife Yelena Bonner, the US National Academy of Sciences confirmed last week that its president had postponed plans to visit the Soviet Union to reestablish formal links with the Soviet Academy of ...
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  • 40
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 577-577 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AN urgent call for information on the consequences of large ground-based fires for the atmosphere of the Earth has gone out from the workshop held in Leningrad between 14 and 16 May on the climatic and biological consequences of nuclear war. The meeting is part of the programme by which the ...
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  • 41
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    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 577-577 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Washington THE companies selected by the US federal government to manufacture a blood test for acquired immune deficiency syndrome (AIDS) are expected to be announced this week. A scientific panel has already met to review the 20 or so proposals received in response to an announcement in the ...
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    Nature 309 (1984), S. 577-577 
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    Notes: [Auszug] 12-Month 12-Month Company Close Close Change high low previous 31 May month 14 8 Biogen (Switzerland) IP/4 9 -23/4 2 1% Bio-Logicals (Canada) P/4 l'/2 -Vi 14% g Bio-Response (USA) 13 V 8% -4l/4 14 10 Cetus (USA) 121/4 10!/4 -2 10% 5 Collaborative Research (USA) 7 5% -I5/ 19% 11 ...
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    Nature 309 (1984), S. 578-578 
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    Notes: [Auszug] SIR You are, of course, right in saying that all is not well in India's Science. But great strides have been made. As our Prime Minister declared during a White House reception, India is engaged in the stupendous task of moving hundreds of millions of people into the twentieth century. Against ...
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    Notes: [Auszug] SIR The key to considering science and technology in India lies in recognizing that India is trying to go through three revolutions simultaneously the agricultural (still incomplete), industrial and computer revolutions with a government that is democratic, a population less than half of which ...
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    Notes: [Auszug] SIR Readers of your survey are likely to conclude that most of what is good and worthy of its name in Indian science is so because (1 ) a director or a chairman or perhaps a minister knows and means his/her business; (2) they or their organizations have or at least had good overseas connections ...
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    Notes: [Auszug] SIR Your special issue on India provides a comprehensive account of accomplishments, failures and problems of science in India. The introductory note to the survey, however, contains the erroneous figure of 2.5 per cent as the annual rate of India's current population growth. The registration of ...
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    Nature 309 (1984), S. 579-579 
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    Notes: [Auszug] Is human intelligence genetically determined, environmentally conditioned or the product of both influences? Since the work of the late Cyril Burt was discredited some years ago, the ferocity seems to have gone out of the argument on this question that had been raging for close on half a century. ...
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    Nature 309 (1984), S. 135-138 
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    Notes: [Auszug] Over 20 years ago, Dungey8 suggested a model of the Earth's magnetosphere in which he proposed magnetic field reconnection as the major process coupling the magnetosphere to the solar wind and driving magnetospheric convection. Considerable indirect support for this model has subsequently been ...
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    Nature 309 (1984), S. 142-144 
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    Notes: [Auszug] Fig. 1 Location of the transects across the Apennine and Carpathian thrust belts (dark lines). The Apennine and outer Carpathian thrust belts are indicated by shading and the approximate position of the thrust fronts are indicated by dark barbed lines. The light continuous line represents the ...
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    Nature 309 (1984), S. 582-582 
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    Notes: [Auszug] DEVOTEES of the school that believes an occult virus is responsible for the induction of rheumatoid arthritis will have welcomed a recent article summarizing a three-year collaborative study undertaken in three USA centres on the identification of par-vovirus-like particles in synovial tissue from ...
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    Notes: [Auszug] PILE-DWELLINGS ON HILLTOPS AMONG the Miris, Singphus, Kamtis, Nogas, Mismis, and Deodhains that I have questioned as to the origin of the custom of building on piles, the answer is invariably that they do not know, that it is their tribal custom, &c. Pressed as to the advantages of it, or why ...
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    Nature 309 (1984), S. 583-583 
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    Notes: [Auszug] ON page 589 of this issue of Nature, Haag et al. report a very nice example of the way in which zeolites can be used in the controlled catalysis of hydrocarbon cracking, which is best seen in the context of John Dwyer's brief but comprehensive overview of zeolites as acid catalysts in the 2 April ...
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    Nature 309 (1984), S. 583-584 
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    Notes: [Auszug] MUCH of the development of T lymphocytes takes place in the thymus, away from the melee in bone marrow where B lymphocytes and other haematopoietic cells differentiate side by side. What is the purpose of this convenient packaging? Is the thymus an inductive environment for switching the ...
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    Nature 309 (1984), S. 584-585 
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    Notes: [Auszug] FOR many years geodesists have examined evidence for the temporal changes in the Earth's global shape and gravity field. Confirmation that such changes occur on time scales of at least several years has now emerged from the observation of a secular acceleration O of the node O of the orbit of the ...
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    Nature 309 (1984), S. 585-587 
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    Notes: [Auszug] THERE are two reasons for the exceptional concentration of research on the cellular myc proto-oncogene (c-myc). The first is historical. The chromosomal translocations characteristic of Burkitt's lym-phomas transfer c-myc from its normal context into an active immunoglobulin locus1, where it was ...
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    Nature 309 (1984), S. 588-588 
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    Notes: [Auszug] SIR - Howgate1 criticizes our interpretations2'3 of the homologies and morphology of the Archaeopteryx manus by distorting and misrepresenting our viewpoints. Palaeontologists have identified the digits of theropods, Archaeopteryx and birds as digits 1-2-3 of the primitive reptilian hand whereas ...
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    Nature 309 (1984), S. 588-588 
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    Notes: [Auszug] SIR - Peter Fellgett raises an interesting suggestion1 that the study of cybernetic feedback loops throws light on the redundant (multiple copy) nature of functional genes and hence places the evolution of this phenomenon within the rubric of Darwinian natural selection. His proposition is that ...
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    Nature 309 (1984), S. 589-591 
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    Notes: [Auszug] The availability of solid acidic catalysts based on zeolite ZSM-5 make possible observations on the nature and the absolute rate behaviour of the individual protonic sites. Tetrahedral aluminium atoms are the highly reactive ingredients, even at levels of parts per million, or less. Turnover ...
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    Nature 309 (1984), S. 598-600 
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    Notes: [Auszug] From the optical mass function of LMC X-3 (2.3 M), the absence of X-ray eclipses, in combination with the observed spectral type and absolute visual magnitude of the B-type companion, Paczynski2 derived a lower limit to the mass of the B-star of 9.0 (6.0 M), that is 5=3.0 M0. By comparing the ...
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    Nature 309 (1984), S. 189-190 
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    Notes: [Auszug] Mathematics Advances in Fuzzy Sets, Possibility Theory, and Applications. P.P. WANG (d.). Plenum: 1983. Pp.42L IBN 0-306-41390-6. $55. A Biologist's Basic Mathematics. By D.R. CAUSTON.Edward Arnold: 1983. Pp.216. PbklSBN 0-7131-2879-8. £7.50. Developments in Statistics, Vol. 4. P.R. ...
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    Nature 309 (1984), S. 3-3 
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    Notes: [Auszug] Washington THE militarization of space may yet become a significant issue in November's presidential election in the United States. For the first time, Mr Walter Mondale, the Democratic front-runner, last week promised to order a freeze on space weapons if he is elected President. In Congress, ...
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    Notes: [Auszug] ONE of genetic engineering's glittering prizes was claimed last week by Genentech Inc., the San Francisco-based biotechnology company, working in collaboration with the Haemophilia Centre at the Royal Free Hospital Medical School, London, and Speywood Laboratories in Wales. The human blood protein ...
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    Nature 309 (1984), S. 5-5 
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    Notes: [Auszug] DISCUSSIONS on a possible 20,000 million deal in nuclear technology were a major feature of President Reagan's visit to China last month. Coincidentally, the President's visit came shortly after the second national congress of the Chinese Nuclear Society, which reviewed the current state of Chinese ...
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    Nature 309 (1984), S. 6-6 
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    Notes: [Auszug] Washington THE inhabitants of Bikini Island, which was used for 23 above-ground nuclear tests between 1946 and 1958, are suing the US Government in an attempt to force a cleanup of their homeland. The 167 residents of the island left at the request of the US military and have since been shifted ...
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    Nature 309 (1984), S. 7-7 
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    Notes: [Auszug] FURTHER signs of the response of Unesco (the United Nations Educational, Scientific and Cultural Organization) to the discontent of some member states should become apparent next week, at the meeting of the organization's executive board arranged for 9-23 May. Those participating in the meeting ...
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    Nature 309 (1984), S. 9-9 
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    Notes: [Auszug] To sponsor a fellowship at the University of Cambridge, in a department (biochemistry) run by a knight (Sir Hans Kornberg) who is also master of a Cambridge college (Christ's), as Amersham International is about to do, may seem slightly odd for a company that thinks of itself as an adventurous ...
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    Notes: [Auszug] SIR ? Two errors are becoming commoner in scientific writings. (1) The word "only" is being shifted forward, away from the word it modifies. Note the differences among the following: "Only I saw the white shark" (no-one else was on deck). "I only saw the white shark" (I didn't actually catch it). ...
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    Nature 309 (1984), S. 13-13 
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    Notes: [Auszug] IN a crowded house on Tuesday last the Convocation of the University of Oxford passed the much-debated statute allowing women to enter for "certain of the honour examinations of the University." The statute has been opposed on very different grounds. The old Conservative Oxford School (fast ...
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    Nature 309 (1984), S. 614-617 
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    Notes: [Auszug] In the expectation that the oxygen and carbon isotopic composition of CO2 sources of structural carbonate in apatite may leave a characteristic fingerprint of the depositional environment9?10, we have initiated an exploratory study of oxygen and carbon isotope abundances of insular phosphates from ...
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    Nature 309 (1984), S. 19-22 
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    Notes: [Auszug] We propose that komatiite lavas were emplaced as turbulent flows, accompanied by vigorous forced convection with cooling rates often in excess of hundreds of °C h−1. They melted and assimilated up to 10% of the ground over which they flowed, forming deep channels. Nickel ...
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    Nature 309 (1984), S. 620-622 
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    Notes: [Auszug] From a Danish adoption register4'5 we have identified four groups of sibling pairs. The first three groups comprise genetically related pairs who were adopted and reared apart in separate families: full siblings reared apart (FA, 34 pairs), maternal half-siblings reared apart (MA, 52 pairs) and ...
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    Nature 309 (1984), S. 622-623 
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    Notes: [Auszug] The computational theory of binocular vision2^, which demonstrates how vertical disparities can be used to discover the distance to the fixation point (d) and the angle of gaze (g) with which the fixation point is being viewed, is introduced in rf. 5. One prediction of the theory is that vertical ...
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    Nature 309 (1984), S. 624-626 
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    Notes: [Auszug] Neurones respond to axonal injury with the retrograde cell reaction0chromatolysis and displacement of the nucleus which may be followed by recovery, or, for centrally projecting neurones in mammals, often by degeneration of the entire cell7'8. Lesions of optic axons cause retrograde degeneration of ...
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    Notes: [Auszug] Table 1 Multi-drug rsistance and 1.1-kb fragment amplification in different cell lines Degree of 1.1-kb Cell line V79 Relative resistance to: Adriamycin Colcemid 1 1 fragment amplification 1 77A 5 7 5 LZ 3,000 436 60 LZ revertant 7 10 CHO Aux Bl . 1 1 1 C5 150 280 20 Isolation and ...
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    Nature 309 (1984), S. 629-631 
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    Notes: [Auszug] While analysing thymic repopulation in allogeneic bone marrow chimaeras we noted one chimaera16in which the allogeneic bone marrow cells differed from the host for both major histocompatibility complex (MHC) encoded antigens and Thy-1 typethat showed one lobe of the thymus entirely reconstituted ...
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    Nature 309 (1984), S. 631-633 
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    Notes: [Auszug] The total protein composition and rates of protein synthesis before and after haemin induction of K562 cells were examined (Fig. 1). After 40 h of incubation with 25 ? haemin, approximately 95% of the K562 cells stained positively with benzidine. The two-dimensional electrophoretic analyses (Fig. ...
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    Notes: [Auszug] Figure la shows the binding of C3b-coated erythrocytes to HSV-1 infected endothelial cells by light microscopy. Rosettes (〉4 erythrocytes per endothelial cell) were found with 70% of infected endothelial cells: no rosettes formed around uninfected cells, nor around infected cells incubated with ...
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    Nature 309 (1984), S. 635-637 
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    Notes: [Auszug] Three Ubx mutations have previously been mapped by genetic recombination. All were found to lie at or close to the right-hand end of the Ubx unit defined by chromosome rearrangements1'7'8. When the DNA of these and other Ubx 'point' alleles was examined, four apparently point Ubx mutations were ...
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    Nature 309 (1984), S. 637-639 
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    Notes: [Auszug] We have chosen the b-lactamase encoded by the Escherichia coli plasmid pBR322 as a model for a prokaryotic secretory protein and Xenopus oocytes as eukaryotic test cells. /3-Lactamase is the major protein secreted into the periplasm of E. coli cells carrying pBR322 and inactivates ampicillin, thus ...
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    Nature 309 (1984), S. 639-640 
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    Notes: [Auszug] The existing H-2 mutants were originally identified by circular skin-grafting experiments among sibling mice7'8. This system of mutants is notable because: (1) the rate of observed mutation is very high, about 1 in 2,500; (2) individual mutational events result in multiple amino acid substitutions; ...
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    Nature 309 (1984), S. 640-642 
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    Notes: [Auszug] As previously reported, the leukaemic cells of most ATL patients contain one or two copies of HTLV provirus4'11, but the size of the coRI-digested DNA fragment containing the provirus and cellular flanking sequences differs between individuals, suggesting that the integration sites of the HTLV ...
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    Nature 309 (1984), S. 644-645 
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    Notes: [Auszug] IN 1970, Dr G.R. Fink offered the advice that "biochemists as well as geneticists should use only S288C or 'isogenic' Saccharomyces strains in their investigations. Regrettably, this has not been the rule in the past". True, the principal yeast of industrial importance is 5. cerevisiae. However, ...
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    Nature 309 (1984), S. 643-644 
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    Notes: [Auszug] H.G. Wells: Aspects of a Life opens bizar-rely not with the birth of its subject but the birth of the biographer Anthony West, Wells's illegitimate son. At first startling, this emerges as rather appropriate, since, for most of the book, West's technique is to superimpose his own situation upon ...
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    Notes: [Auszug] THE study of chemical processes in natural waters tends to be pursued in compartments oceans, lakes, rivers, ground-waters and so on. One reason for this lies in the large differences between such environments regarding the spatial and temporal frameworks within which geochemical processes can ...
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    Nature 309 (1984), S. 645-646 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] IN King Arthur's legendary domain, the Knights of the Round Table slew dragons and rescued fair maidens; only the pure of heart could hope to glimpse the Holy Grail. Heppenheimer likens the quest for controlled fusion to such an enterprise, but one pursued by more fallible human beings. In a ...
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    Nature 309 (1984), S. 646-646 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] SIR Alister Hardy is prominent among those who have argued for "Darwinism with a difference". Whilst acknowledging the creative powers of natural selection, he enshrines innovative behaviour as a distinctive selective force. His argument is that a learnt and beneficial habit can be instrumental in ...
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    Nature 309 (1984), S. 647-647 
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    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A FEW years from now, the heading on these pages will be entirely inappropriate. The idea that the use of computers in laboratories is sufficiently novel to be remarked upon will have ceased entirely to be noteworthy, just as it would now seem strange to assemble a few pages of this journal under ...
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    Nature 309 (1984), S. 648-648 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] GIVEN the shortage of suitable software for analysing biological data by microcomputer, the publication of books containing methods and programs for that purpose is generally all to the good. One recent book of this type is Statistics and Numerical Methods in BASIC for Biologists, written by J.D. ...
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    Nature 309 (1984), S. 648-649 
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    Notes: [Auszug] The Applications of Computers to Research on Nucleic Acids II, Parts 1 and 2. Edited by D. Söll and R. J. Roberts. IRL Press: 1984. Pp.856. Pbk 30, 60. Time Warps, String Edits and Macromolecules: The Theory and Practice of Sequence Comparison. Edited by D. Sankoff and J.B. Kruskal. ...
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    Nature 309 (1984), S. 649-649 
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    Notes: [Auszug] Biodata Handling with Microcomputers. By R.B. Barlow. Elsevier Biosoft, 68 Hills Road, Cambridge CB2ILA, UK: 1983. Pp.261. 18, 30. Disks 30, 50. EVEN the least expensive "home computers" are capable of carrying out all the statistical analysis that most biologists will require and usually before ...
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    Nature 309 (1984), S. 650-650 
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    Notes: [Auszug] PAPERBASE: A Computerized Personal Database for Scientists. By Anthony Durham. Wight Scientific, 44 Roan St, London SE109JT. Booklet, pp.31, 25, 50 (airmail postage included) for institutional use; 10, 20 f or personal use. Diskettes available for various computers, 50, 100 (booklet included). ...
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    Nature 308 (1984), S. 776-776 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] SIR - In the correspondence from Marcus Gosslerl we are informed that, in the event of the statistical evidence being sufficient, "the numerological result has to be taken seriously and cannot be dismissed by any non-mathematical reasoning". However, I think it also reasonable to point out (and I ...
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    Nature 309 (1984), S. 650-652 
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    Notes: [Auszug] The Series 7000 professional computers from Perkin-Elmer are advanced microcomputer data processing systems specifically for laboratory applications. Two models are available: the PE 7500 and PE 7300, capable of both analytical and management functions. In an integrated workstation, a Series 7000 ...
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    Nature 309 (1984), S. 653-653 
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    Notes: [Auszug] Physics Advances in Diagnostic Visual Optics: Springer Series in Optical Sciences. G.M. BREININ and I.M. SIEGEL (eds). Springer-Verlag: 1983. Pp.247. ISBN 3-540-13079-9/0-387-13079-9. DM67, 26. Application of Transition State Theory to Unimolecular Reactions: An Introduction. By J.H. BEYNON and ...
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    Nature 309 (1984), S. 481-482 
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    Source: Nature Archives 1869 - 2009
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    Notes: [Auszug] EUROPE may not be made in the few weeks ahead, but there is a danger that it could be broken. And certainly the month that lies ahead will be crucial for the whole enterprise. First come the European elections, only the second occasion on which representatives to the European Parliament have been ...
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    Nature 309 (1984), S. 654-654 
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    Notes: [Auszug] BIOTECHNOLOGY is one of the fast growing new technologies. It was born as late as the 1970s and is recognized everywhere as a key technology for the future. As well as the United States and Japan, the technology superpowers, France, West Germany, Switzerland and the United Kingdom have taken ...
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    Nature 309 (1984), S. 482-482 
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    Notes: [Auszug] ON the face of things, there seems no prospect of an early improvement in relations between the Soviet Union and the West. Even the proposal that the president of the US National Academy of Sciences, Dr Frank Press, should go to Moscow to try out some unspecified plans for further collaboration has ...
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    Nature 309 (1984), S. 482-482 
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    Notes: [Auszug] WHILE nobody is conspicuously to blame that one of the best-known British laboratories in the neurosciences is to be closed (see p.486), the affair should give pause to those responsible for the management of research in countries such as Britiain, but in Britain in particular. And while the ...
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    Nature 309 (1984), S. 483-483 
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    Notes: [Auszug] TINY Luxembourg has thrown a spanner into the comfortable world of European telecommunications. In particular, Luxembourg has deeply offended the government of France by announcing that it plans to license a commercial consortium to launch communications satellites capable of delivering television ...
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    Nature 309 (1984), S. 484-484 
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    Notes: [Auszug] Jerusalem DR Yoram Dinstein, rector of Tel Aviv University, last week announced a new endowment fund to establish university posts for Jewish scientists emigrating from the Soviet Union. The timing was somewhat inauspicious. Israeli universities are so short of funds that six months ago it was ...
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