1 January, 1977
Previous studies on fish Mg2+Ca2+ activated myofibrillar ATPases have been extended to species inhabiting diverse thermal environments. Cold adapted ATPases have considerably higher catalytic centred activities at low temperatures than…1 January, 1977
Studies have been carried out on the Mg2+ Ca2+-myofibrillar ATPase from the muscles of fish adapted to different environmental temperatures. The thermal stability of the ATPase is strongly correlated with…1 January, 1977
Six main British Antarctic Survey stations were occupied throughout the year. Of these, Adelaide air base on Adelaide Island was closed down at the end of the summer, as it…1 January, 1977 by Andrew Clarke
Following a shift from autotrophic to heterotrophic nutrition, cells of Chlorella protothecoides become sensitive to the stresses of freezing and thawing. The injury then observed at slow rates of cooling…1 January, 1977
O'HARA1 has recently proposed an open-system model for the fractional crystallisation of magmas involving continual replenishment of the magma chamber and only partial extraction of the fractionated liquid at each…Read more on Open system crystal fractionation and incompatible element variation in basalts
1 January, 1977
Following current interpretation of isotope data from oceanic basalts, the case for inheritance of Rb/Sr and 87Sr/86Sr ratios in continental igneous rocks from long-lived heterogeneities in the mantle is reviewed,…Read more on Strontium isotope evidence for mantle events in the continental lithosphere
1 January, 1977
The growth of two Antarctic lamellibranchs, Adamussium colbecki (E.A. Smith) and Laternula elliptica (King and Broderip), has been investigated. A. colbecki is a pectinid that grows to a shell height…Read more on Growth of two Antarctic lamellibranchs: Adamussium colbecki and Laternula elliptica
1 January, 1977
An analysis is made of the disturbance in conductive heat flow caused by drilling a bore hole in ice in which there is a vertical temperature gradient. The model used…1 January, 1977
The Larsen Harbour Formation of southern South Georgia is part of an ophiolite sequence of submarine lavas and sheeted dykes emplaced into metasedimentary country rocks. The metasediments are remnants of…Read more on The occurrence of Mesozoic oceanic floor and ancient continental crust on South Georgia
1 January, 1977
The bibliography lists 166 references on the paleontology of Lesser Antarctica and the Scotia Ridge. It aims to identify all the paleontological discoveries made and to list all the major…Read more on An annotated bibliography of the paleontology of Lesser Antarctica and the Scotia Ridge
1 January, 1977
We have found fossil angiosperm leaves more than 1,000 km further south than any other previously reported. Specimens were obtained in situ by R. W. B. from tuffs in a…1 January, 1977
Analysis of wind-speed measurements made over a six-month period on an Antarctic glacier showed that conditions near the surface were dominated by gravity winds flowing downhill. In such conditions there…1 January, 1976
A summary is given of comparative work carried out within the I.B.P. Tundra Biome at an Arctic station (Greenland) and a sub-Antarctic station (South Georgia). The investigations covered many aspects…1 January, 1976
(1) Six annual agricultural species were grown in summer at South Georgia (54⚬S) and in the winter-spring growing season at Melbourne (38⚬S). (2) The mean daily air temperature at South…Read more on Development and growth of some agricultural species on a subantarctic island
1 January, 1976 by William Block
Oxygen consumption rates of the minute terrestrial mite, Nanorchestes antarcticus Strandtmann were measured at +5°C with a Cartesian Diver microrespirometer. Individual respiration rates were in the range 0.156 (deutonymphy) to…Read more on Oxygen uptake by Nanorchestes antarcticus (Acari)
1 January, 1976
The British Antarctic Survey (BAS) has relied on sledge dogs as the main form of transport for field parties since its predecessor, the Falkland Islands Dependencies Survey (FIDS), imported them…1 January, 1976
Six species are described and compared with related algae. All were isolated in culture from terrestrial habitats on Signy Island, South Orkney Islands, Antarctica. They are: Botrydiopsis constricta sp. nov.…1 January, 1976
Studies of plants growing in tundra regions have tended to concentrate either upon whole plant communities or upon the physiology and metabolism of above- or below-ground plant organs considered separately.…Read more on Strategies of growth and population dynamics of tundra plants. 1. Introduction
1 January, 1976 by Andrew Clarke
The stomach oil produced by many marine birds of the order Procellariiformes is an important aspect of their breeding ecology. Fifty-seven samples of stomach oil from six species of subantarctic…1 January, 1976
The pattern of growth of Polytrichum alpestre Hoppe, a common moss in the maritime Antarctic, is described. It may form extensive communities, sometimes growing with another moss, Chorisodontium aciphyllum (Hook.…1 January, 1976
An ice shelf is a floating ice sheet, attached to land where ice is grounded along the coastline. Nourished both by surface snow accumulation and by glaciers and ice sheets…Read more on Thermodynamics of the interaction between ice shelves and the sea
1 January, 1976
A comparison has been mager between ice velocities that were measured by the radio-echo technique and by a survey method on the Devon Island ice cap, Arctic Canada (lat. 75°…Read more on A further comparison of glacier velocities measured by radio-echo and survey methods
1 January, 1976
Results of analysis of the diurnal variations of hmF2 for Argentine Islands (65°15'S, 64°16'W) and Halley Bay (75°30'S, 26°40'W) are presented. It is shown that, for summer months, the diurnal…1 January, 1976
Median height distributions of electron concentration may be determined from ionograms by means of the composite ionogram technique of Wright, or by inserting tabulated parameters in the idealized model of…1 January, 1976
The past ten years have seen a greatly increased interest in the Antarctic krill Euphausia superba Dana (Fig 1). In particular there have been several Russian expeditions whose main aim…Read more on Antarctic krill: a reappraisal of its distribution
1 January, 1976
The British Arctic Expedition sailed from Portsmouth on 29 May 1875. It left amid considerable public enthusiasm and with a telegram from the Queen. A contemporary journal had this to…1 January, 1976
After five months of total isolation a wintering party of seventeen British Antarctic Survey (BAS) personnel was inoculated under double blind concitions with placebo, or rhinovirus type 2 which had…Read more on Studies of experimental rhinovirus type 2 infections in polar isolation and in England
1 January, 1976
The proportion of the working population employed on some form of shift system has increased substantially over the past two or three decades. Expert opinion as to the optimal form…1 January, 1976
A method is described for combining ionosonde and riometer data which overcomes limitations in both techniques for the measurement of normal absorption in the lower ionosphere. The usefulness of these…Read more on Combination of ionosonde and riometer data for absorption measurements
1 January, 1976
During a preliminary limnological survey of a number of high altitude lochs in the Scottish Highlands a rich benthic bryophyte flora was noted in four of these with exceptionally clear…Read more on Deep-water bryophytes from the highest Scottish lochs
1 January, 1976
Seven British Antarctic Survey stations were operational during the year. However, in March 19755 Stonington Island was closed after 21 years of occupation. A number of senior Survey staff visited…1 January, 1976
Six British Antarctic Survey stations were operational during the year. A new station, at Rothera Point, Adelaide Island, is being built to replace Adelaide station. Its development is providing a…1 January, 1976
Satellite pictures have revealed the presence of ridges on the summits of ice rises in Antarctica. Because ice does not exhibit a critical stress it is conclugerd that these ridges…1 January, 1976
The effects of variation in light intensity, temperature, and water content on rates of net photosynthesis and dark respiration have been investigated in two common tundra mosses, Polytrichum alpinum from…Read more on Comparative CO2 exchange patterns in mosses from two tundra habitats at Barrow, Alaska
1 January, 1976
Anomalous polar absorption events detected by means of ionosondes at four stations in the northern hemisphere and four in the southern hemisphere have been compared with energetic particle events observed…Read more on Solar proton and electron precipitation effects detected by ionosondes
1 January, 1976
The correlation in occurrence of spread-F observed at two magnetically conjugate mid-latitude observatories is shown to be very significant, whereas for non-conjugate stations similar correlations are negligible.Read more on The simultaneous occurrence of spread-F at magnetically conjugate points