Browsing MIT Open Access Articles by Title
Now showing items 11793-11812 of 55760
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Dimensionality-reduction techniques for complex mass spectrometric datasets: Application to laboratory atmospheric organic oxidation experiments
(Copernicus GmbH, 2020-01)Oxidation of organic compounds in the atmosphere produces an immensely complex mixture of product species, posing a challenge for both their measurement in laboratory studies and their inclusion in air quality and climate ... -
Dimensions of marine phytoplankton diversity
(Copernicus GmbH, 2020-02)Biodiversity of phytoplankton is important for ecosystem stability and marine biogeochemistry. However, the large-scale patterns of diversity are not well understood and are often poorly characterized in terms of statistical ... -
Dimer states of Rydberg atoms on the Kagome lattice as resources for universal measurement-based quantum computation
(AIP Publishing, 2022-11-01)<jats:p> We show that the quantum dimer state on the Kagome lattice, which was recently realized with high fidelity in a Rydberg quantum simulator [G. Semeghini et al., Science 374, 6572 (2021)], offers a sufficient resource ... -
Dimerization of functional pyrroloindolizines for the synthesis of complex myrmicarin alkaloids
(Elsevier B.V., 2010-04)The union of functionalized pyrroloindolizines for the synthesis of heterodimeric products relevant to myrmicarin alkaloids is described. Design and synthesis of tricyclic substrates and new methods for their union enable ... -
Dimethyl Sulfoxide (DMSO) Exacerbates Cisplatin-induced Sensory Hair Cell Death in Zebrafish (Danio rerio)
(Public Library of Science, 2013-02)Inner ear sensory hair cells die following exposure to aminoglycoside antibiotics or chemotherapeutics like cisplatin, leading to permanent auditory and/or balance deficits in humans. Zebrafish (Danio rerio) are used to ... -
Diminished diversity-of-thought in a standard large language model
(Springer US, 2024-01-09)We test whether large language models (LLMs) can be used to simulate human participants in social-science studies. To do this, we ran replications of 14 studies from the Many Labs 2 replication project with OpenAI’s ... -
Diminished PRRX1 Expression Is Associated With Increased Risk of Atrial Fibrillation and Shortening of the Cardiac Action Potential
(Ovid Technologies (Wolters Kluwer Health), 2017-10)Atrial fibrillation (AF) affects over 33 million individuals worldwide. Genome-wide association studies have identified at least 30 AF loci, but the mechanisms through which individual variants lead to altered disease risk ... -
A DinB variant reveals diverse physiological consequences of incomplete extension by a Y-family DNA polymerase
(National Academy of Sciences (U.S.), 2009-12)The only Y-family DNA polymerase conserved among all domains of life, DinB and its mammalian ortholog pol κ, catalyzes proficient bypass of damaged DNA in translesion synthesis (TLS). Y-family DNA polymerases, including ... -
A DinB variant reveals diverse physiological consequences of incomplete TLS extension by a Y-family DNA polymerase
(National Academy of Sciences (U.S.), 2009-11)The only Y-family DNA polymerase conserved among all domains of life, DinB and its mammalian ortholog pol κ, catalyzes proficient bypass of damaged DNA in translesion synthesis (TLS). Y-family DNA polymerases, including ... -
Dinosaur peptides suggest mechanisms of protein survival
(Public Library of Science, 2011-06)Eleven collagen peptide sequences recovered from chemical extracts of dinosaur bones were mapped onto molecular models of the vertebrate collagen fibril derived from extant taxa. The dinosaur peptides localized to fibril ... -
Diode Evaluation and Series Diode Balancing for High-Voltage High-Frequency Power Converters
(Institute of Electrical and Electronics Engineers (IEEE), 2020-06)Miniaturization of high-voltage power converters is severely limited by the availability of fast switching, low-loss high-voltage diodes. This article explores techniques for using discrete low-voltage diodes in series as ... -
Diode-Pumped Cryogenic Yb[superscript 3+]:YLF Laser of 100-W Output Power with High Beam Quality
(SPIE, 2010-03)A cryogenically cooled Yb:YLF laser with 224-W output power at 995 nm, linearly polarized along the c-axis, has been demonstrated, and laser oscillation has also been obtained polarized along the a-axis. The beam quality ... -
Diode-Pumped Gigahertz Repetition Rate Femtosecond Cr:Lisaf Laser
(Institute of Electrical and Electronics Engineers (IEEE), 2010-07)We report a low-cost, 1 GHz repetition-rate, diode-pumped, saturable Bragg reflectors mode-locked Cr:LiSAF laser, which generates nearly transform-limited 103-fs long pulses around 866 nm, with a record high peak power of 1.45 kW. -
A Dioxane Template for Highly Selective Epoxy Alcohol Cyclizations
(Wiley Blackwell, 2013-06)Ladder polyether natural products are a class of natural products denoted by their high functional-group density and large number of well-defined stereocenters. They comprise the toxic component of harmful algal blooms ... -
Dioxygen Activation in Soluble Methane Monooxygenase
(American Chemical Society, 2011-03)The controlled oxidation of methane to methanol is a chemical transformation of great value, particularly in the pursuit of alternative fuels, but the reaction remains underutilized industrially because of inefficient and ... -
Diphoton excess at 750 GeV: gluon–gluon fusion or quark–antiquark annihilation?
(Springer Berlin Heidelberg, 2016-06)Recently, ATLAS and CMS collaborations reported an excess in the measurement of diphoton events, which can be explained by a new resonance with a mass around 750 GeV. In this work, we explored the possibility of identifying ... -
Dipolar recoupling in solid state NMR by phase alternating pulse sequences
(Elsevier, 2008-12)We describe some new developments in the methodology of making heteronuclear and homonuclear recoupling experiments in solid state NMR insensitive to rf-inhomogeneity by phase alternating the irradiation on the spin system ... -
A dipole polarizable potential for reduced and doped CeO[subscript 2] obtained from first principles
(IOP Publishing, 2011-06)In this paper we present the parameterization of a new interionic potential for stoichiometric, reduced and doped CeO[subscript 2]. We use a dipole polarizable potential (DIPPIM: the dipole polarizable ion model) and ... -
Dipole-mediated exciton management strategy enabled by reticular chemistry
(Royal Society of Chemistry (RSC), 2022)<jats:p>A strategy is designed to selectively block undesirable pathways in photophysical processes that consist of a mixture of Förster and Dexter energy transfer steps.</jats:p> -
Diquark correlations in a hadron from lattice QCD
(American Institute of Physics, 2011-07)Using lattice QCD, a diquark can be studied in a gauge-invariant manner by binding it to a static quark in a heavylight-light hadron. We compute the simultaneous two-quark density of a diquark, including corrections for ...