Search Results - "ANDREWS, JOHN T."

Despite slow catalysis and confused substrate specificity, all ribulose bisphosphate carboxylases may be nearly perfectly optimized by Tcherkez, G.G.B, Farquhar, G.D, Andrews, T.J

“…The cornerstone of autotrophy, the CO₂-fixing enzyme, D-ribulose1,5-bisphosphate carboxylase/oxygenase (Rubisco), is hamstrung by slow catalysis and confusion…”
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The Greenland Ice Sheet during the last glacial cycle: Current ice loss and contribution to sea-level rise from a palaeoclimatic perspective by Vasskog, Kristian, Langebroek, Petra M., Andrews, John T., Nilsen, Jan Even Ø., Nesje, Atle

“…During the Last Interglacial (LIG) period, between 130 and 116 thousand years before present (ka BP), the Greenland Ice Sheet (GrIS) was considerably reduced…”
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Two millennia of North Atlantic seasonality and implications for Norse colonies by Patterson, William P, Dietrich, Kristin A, Holmden, Chris, Andrews, John T

“…δ¹⁸O values of mollusks recovered from near-shore marine cores in northwest Iceland quantify significant variation in seasonal temperature over the period from…”
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Tracking Holocene drift-ice limits on the northwest-southwest Iceland shelf: Comparing proxy data with observation and historical evidence by Andrews, John T., Jónsdóttir, Ingibjörg, Geirsdóttir, Áslaug

“…We detail variations in the weight percent (wt%) of quartz, a proxy for drift ice, in fifteen marine sediment cores from the northwest, west, and southwest…”
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Faster Rubisco Is the Key to Superior Nitrogen-Use Efficiency in NADP-Malic Enzyme Relative to NAD-Malic Enzyme C₄ Grasses by Ghannoum, Oula, Evans, John R., Chow, Wah Soon, Andrews, T. John, Conroy, Jann P., von Caemmerer, Susanne

“…In 27 C4 grasses grown under adequate or deficient nitrogen (N) supplies, N-use efficiency at the photosynthetic (assimilation rate per unit leaf N) and…”
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Manipulating ribulose bisphosphate carboxylase/oxygenase in the chloroplasts of higher plants by John Andrews, T., Whitney, Spencer M.

“…Transgenic manipulation of the photosynthetic CO 2-fixing enzyme, ribulose bisphosphate carboxylase/oxygenase (Rubisco) in higher plants provides a very…”
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Mechanism of Rubisco:  The Carbamate as General Base by Cleland, W. Wallace, Andrews, T. John, Gutteridge, Steven, Hartman, Fred C, Lorimer, George H

“…Rubisco, the world's most abundant enzyme, has reacted with much of the carbon in nature. The mechanism controlling Rubisco is examined…”
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Do paleoclimate proxies agree? A test comparing 19 late Holocene climate and sea-ice reconstructions from Icelandic marine and lake sediments by Axford, Yarrow, Andresen, Camilla S., Andrews, John T., Belt, Simon T., Geirsdóttir, Áslaug, Massé, Guillaume, Miller, Gifford H., Ólafsdóttir, Sædís, Vare, Lindsay L.

“…Geochemical, mineralogical and biological indicators preserved in sediments are widely used to reconstruct past climate change, but proxies differ in the…”
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Plastome-Encoded Bacterial Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase (RubisCO) Supports Photosynthesis and Growth in Tobacco by Whitney, Spencer M., Andrews, T. John

“…The efficiency with which crop plants use their resources of light, water, and fertilizer nitrogen could be enhanced by replacing their CO2-fixing enzyme,…”
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A mid-Holocene shift in Arctic sea-ice variability on the East Greenland Shelf by Jennings, Anne E., Knudsen, Karen Luise, Hald, Morten, Hansen, Carsten Vigen, Andrews, John T.

“…Records of iceberg-rafting and palaeohydrography from two East Greenland shelf cores (JM96-1206/1-GC and JM96-1207/1-GC) are reported. Benthic foraminifera,…”
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Grain size and mineral variability of glacial marine sediments by Andrews, John T, Roth, Wendy J, Jennings, Anne E

“…Glacial marine sediment deposition varies both spatially and temporally, but nearly all studies evaluate down-core (∼time) variations in sediment variables…”
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The Relationship between Side Reactions and Slow Inhibition of Ribulose-bisphosphate Carboxylase Revealed by a Loop 6 Mutant of the Tobacco Enzyme by Pearce, F.Grant, Andrews, T.John

“…The first directed mutant of a higher plant ribulose-bisphosphate carboxylase/oxygenase (Rubisco), constructed by chloroplast transformation, is catalytically…”
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Photosynthetic electron sinks in transgenic tobacco with reduced amounts of Rubisco: little evidence for significant Mehler reaction by Ruuska, Sari A., Badger, Murray R., Andrews, T. John, von Caemmerer, Susanne

“…Transgenic tobacco (Nicotiana tabacum L. cv. W38) plants with an antisense gene directed against the mRNA of the small subunit of Rubisco were used to…”
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Ocean forcing of Ice Sheet retreat in central west Greenland from LGM to the early Holocene by Jennings, Anne E., Andrews, John T., Ó Cofaigh, Colm, Onge, Guillaume St, Sheldon, Christina, Belt, Simon T., Cabedo-Sanz, Patricia, Hillaire-Marcel, Claude

“…Three radiocarbon dated sediment cores from trough mouth fans on the central west Greenland continental slope were studied to determine the timing and…”
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Crow Never Dies: Life on the Great Hunt by Andrews, John T

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Brian MacLean, September 3, 1929 - April 30, 2021 by Jennings, Anne E., Andrews, John T.

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History of sea ice in the Arctic by Polyak, Leonid, Alley, Richard B., Andrews, John T., Brigham-Grette, Julie, Cronin, Thomas M., Darby, Dennis A., Dyke, Arthur S., Fitzpatrick, Joan J., Funder, Svend, Holland, Marika, Jennings, Anne E., Miller, Gifford H., O'Regan, Matt, Savelle, James, Serreze, Mark, St. John, Kristen, White, James W.C., Wolff, Eric

“…Arctic sea-ice extent and volume are declining rapidly. Several studies project that the Arctic Ocean may become seasonally ice-free by the year 2040 or even…”
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Holocene ice-rafting and sediment transport from the glaciated margin of East Greenland (67–70°N) to the N Iceland shelves: detecting and modelling changing sediment sources by Andrews, John T., Bigg, Grant R., Wilton, David J.

“…We examine variations in the ice-rafted sources for sediments in the Iceland/East Greenland offshore marine archives by utilizing a sediment unmixing model and…”
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North-eastern Laurentide, western Greenland and southern Innuitian ice stream dynamics during the last glacial cycle by SIMON, QUENTIN, HILLAIRE-MARCEL, CLAUDE, ST-ONGE, GUILLAUME, ANDREWS, JOHN T.

“…ABSTRACT Precise relationships between high‐frequency ice sheet dynamics and late Quaternary climate variability are still poorly understood, notably with…”
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The onset of neoglaciation in Iceland and the 4.2 ka event by Geirsdottir, Aslaug, Miller, Gifford H, Andrews, John T, Harning, David J, Anderson, Leif S, Florian, Christopher, Larsen, Darren J, Thordarson, Thor

“…Strong similarities in Holocene climate reconstructions derived from multiple proxies (BSi, TOC – total organic carbon, δ13C, C∕N, MS – magnetic…”
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