30,887 research outputs found
Control of intestinal sweet taste receptor expression is impaired in type 2 diabetes
No full textOral Presentation #31R.L. Young, K Sutherland, N. Pezos, S.M. Brierley, J. Ma, C.K. Rayner, M. Horowitz and L.A. Blacksha
Protein 'pre-loads' in type 2 diabetes: what do we know and what do we need to find out?
No full textLetter
Link to a related website: https://link.springer.com/content/pdf/10.1007/s00125-014-3410-x.pdf, Open Access via UnpaywallChristopher K. Rayner, Jing Ma, Karen L. Jones, Peter M. Clifton, Michael Horowit
In-situ U-Pb geochronology and Hf isotope analyses of the Rayner Complex, east Antarctica
No full textIn-situ zircon U–Pb and Hf isotopic analysis via laser ablation microprobe-inductively coupled plasma mass spectrometer (LAM-ICPMS) of samples from Kemp and MacRobertson Lands, east Antarctica suggests that the Kemp Land terrane evolved separately from the rest of the Rayner Complex prior to the ca. 940 Ma Rayner Structural Episode. Several Archaean metamorphic events in rocks from western Kemp Land can be correlated with events previously reported for the adjacent Napier Complex. Recently reported ca. 1,600 Ma isotopic disturbance in rocks from the Oygarden Group may be correlated with a charnockitic intrusion in the Stillwell Hills before ca. 1,550 Ma. Despite being separated by some 200 km, THf DM ages indicate felsic orthogneiss from Rippon Point, the Oygarden Group, Havstein Island and the Stillwell Hills share a ca. 3,660–3,560 Ma source that is indistinguishable from that previously reported for parts of the Napier Complex. More recent additions to this crust include Proterozoic charnockite in the Stillwell Hills and the vicinity of Mawson Station. These plutons have distinct 176Hf/177Hf ratios and formed via the melting of crust generated at ca. 2,150–2,550 Ma and ca. 1,790– 1,870 Ma respectively
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Serum bile acid response to an oral glucose load is exaggerated in newly diagnosed, treatment-naive, Chinese with type 2 diabetes and is reduced by insulin-pump therapy
No full textC. Xiang, C. Chen, Y. Sun, Y. Luo, J. Ma, C. Xie, W. Huang, K. Jones, M. Horowitz, C. Rayner, T. W
A two-stage evolution of the Neoproterozoic Rayner Structural Episode: new U-Pb sensitive high resolution ion microprobe constraints from the Oygarden Group, Kemp Land, East Antarctica
No full textU-Pb sensitive high resolution ion microprobe (SHRIMP) zircon analyses have been used to place time constraints on the Proterozoic reworking of Archaean rocks during the Rayner Structural Episode in the Oygarden Group of islands, Kemp Land, East Antarctica. Felsic orthogneiss that preserves evidence for foliations that pre-date the Rayner Structural Episode, was deformed by two events during the Rayner Structural Episode: the first characterised by east-directed sub-horizontal thrusting, and the second by a regional scale south-dipping extensional shear zone. Metamorphic overgrowths on zircon grains from felsic orthogneiss, which have 929 ± 12 and 924 ± 17 Ma ages, are interpreted to have formed during granulite facies metamorphism that accompanied the thrusting event. Crystallisation of zircon in migmatite that also formed during this event, occurred in two stages: 904 ± 16 and 884 ± 24 Ma. Overgrowths on zircon in a pegmatite that intruded during the second event formed at 931 ± 14 Ma. Charnockite that was emplaced in the Stillwell Hills prior to a regional thrusting event, was metamorphosed at 913 ± 8 Ma. However, the distribution of isotopic data suggest the charnockite may have intruded at ca. 960 Ma. The ages for regional thrusting in the Oygarden Group and the Stillwell Hills correlate, suggesting that the Rayner Structural Episode did not affect Kemp Land until ca. 930 Ma. This age for peak metamorphism in Kemp Land is therefore 50 Myr younger than the age inferred for the Rayner Structural Episode further to the east on the Mawson Coast and south in the northern Prince Charles Mountains. The ages from the Oygarden rocks correlate with the second half of the orogenic episode seen on the Mawson Coast and northern Prince Charles Mountains, consistent with the possibility of two phases of collision in a transition from an Andean-style margin to continent-continent collision between 1000 and 900 Ma. Previously unreported ca. 1600-1650 Ma ages were also discovered in orthogneiss and pegmatite samples, indicating a thermal event in Kemp Land at this time. The 1600-1650 and 930-900 Ma ages from the Oygarden Group correlate with metamorphic and magmatic ages from the Eastern Ghats, placing further constraints on the correlation between these metamorphic belts
Cambrian high-temperature reworking of the Rayner-Eastern ghats terrane: constraints from the Northern Prince Charles Mountains region, East Antarctica
No full textData source: Supplementary data, https://academic.oup.com/petrology/article-lookup/doi/10.1093/petrology/egv082#supplementary-dataMetapelitic rocks from the northern Prince Charles Mountains–East Amery Ice Shelf region of the Rayner Complex, East Antarctica, record high-temperature reworking during Cambrian times. Calculated metamorphic phase diagrams for rocks with varying chemical compositions and mineral assemblages suggest that peak temperatures were 800–870°C at pressures of 5·5–6·5 kbar. However, Cambrian-age high- T reworking is patchy and is recorded only in some locations, with other areas recording pristine early Mesoproterozoic–Neoproterozoic assemblages formed during the c. 1000–900 Ma Rayner Orogeny. The spatial distribution of reworking may indicate that the comparatively anhydrous residual rock compositions inherited from the Rayner Orogeny were relatively inert to reworking during the Cambrian. Domains that record Cambrian reworking conceivably underwent hydrous retrogression at the end of the Rayner Orogeny and were therefore comparatively reactive during reheating in the Cambrian. High- T reworking during the Cambrian has previously been recognized in the Prydz Bay region at the margin of the Rayner Complex, but not in the northern Prince Charles Mountains. The Eastern Ghats Province in India, which was formerly contiguous with the Rayner Complex, preserves a similarly enigmatic record of Cambrian geochronology, suggesting that the Rayner–Eastern Ghats terrane as a whole may have experienced selective reworking during the Cambrian. The geodynamic setting for the formation of this thermal regime is not well understood, but the attainment of high crustal temperatures may have been facilitated by a reduced capacity for thermal buffering, arising from limited partial melting within a previously dehydrated crustal column.Laura J. Morrissey, Martin Hand, David E. Kelsey, Benjamin P. Wad
The Mesoproterozoic Rayner Province in the Lambert Glacier area: its age, origin, isotopic structure and implications for Australia–Antarctica correlations
No full textWithin the Rayner Province in the Lambert Glacier area, two Proterozoic lithotectonic zones are distinguished, which differ
in age and lithology. In the Fisher Zone, a significant juvenile component (εNd(t)=+2 to +4) is represented by mafic, intermediate and felsic plutonic and volcanic rocks; the tectonomagmatic processes were
concentrated at c. 1400–1200 Ma. In the Beaver Zone, orthogneisses record multiple emplacement, metamorphism and ductile deformation at c. 1150–930 Ma. New U–Pb SHRIMP-II zircon ages (c. 1140 Ma and 1095 Ma – protolith emplacement; c. 950–850 and c. 540 Ma – metamorphism), chemical and Sm–Nd isotopic data indicate that both zones have their continuations in the eastern
Amery Ice shelf coast. The Rayner Province has some geological features in common with the Albany-Fraser Orogen in Western
Australia, suggesting that these regions evolved in similar tectonic environments at c. 1400–1300 Ma, followed by steady closure, from east to west, of the ocean that separated the Mawson Continent from Western
Australia.
</p
Superimposed tectonic events at 2450 Ma, 2100 Ma, 900 Ma and 500 Ma in the North Mawson Escarpment, Antarctic Prince Charles Mountains
No full textThe North Mawson Escarpment, in Antarctica's Prince Charles Mountains, forms part of a Palaeoproterozoic crustal complex which separates Archaean cratonic material to the south from Early Neoproterozoic and Early Palaeozoic metamorphic belts to the north. It consists of nappe-like masses of grey gneiss and metasupracrustal rocks that were subjected to repeated ductile deformation under upper amphibolite to lower granulite facies metamorphic conditions. In this paper, we report zircon U-Pb dating results that constrain the principal tectonothermal events to the periods 2490-2420 Ma, 2180-2080 Ma, 940-880Ma and 530-490 Ma. The magmatic precursors of volumetrically important grey gneiss were produced, and reworked at least partly, during the 2490-2420Ma and 2180-2080Ma events. The superimposition of these events is clearly documented by U-Pb ages from several composite zircons. The formation of associated metasupracrustals, possibly in a passive margin setting, occurred between the 2490-2420Ma and 940-880Ma events. Both grey gneiss and metasupracrustals were subsequently reworked during the 940-880Ma and 530-490Ma events, corresponding to the superposition of both the Rayner and Prydz Belts onto Palaeoproterozoic lithosphere of the Lambert Complex. Transposition and peak metamorphism preceded the intrusion of leucogranite dykes at 905Ma and, based on metamorphic zircon growth at around 930Ma in metapelitic schist, are related to the Rayner orogeny. It is suggested that the North Mawson Escarpmentwas assembled to most coastal regions of the Antarctic sector between 45 grades and 80 gradesE by at least 900 m.y. ago
Comment on: Chen et al. Utilizing the second-meal effect in Type 2 diabetes: practical use of a soya-yogurt snack. Diabetes Care 2010;33:2552-2554
No full textCorrected by: Erratum: Comment on: Chen et al. Utilizing the second-meal effect in type 2 diabetes: Practical use of a soya-yogurt snack. Diabetes Care 2010;33:2552-2554 (Diabetes Care (2011) 34, (e55)), in Diabetes Care 2011 Aug; 34(8): 1887-1887. http://dx.doi.org/10.2337/dc11-er08c. Due to a production error, the page numbers appeared incorrectly in the PDF versions of the articles listed. The correct page numbers are given, followed in brackets by the numbers that incorrectly appeared in the PDF versions. The online PDF versions have been corrected.Christopher K. Rayner, Jing Ma, Karen L. Jones, and Michael Horowit
- …
