4 research outputs found
Lateglacial to Holocene palaeoenvironmental change in the Muck Deep, offshore western Scotland
Seismic unit classification in the Muck Deep, summary of the Muck Core Units described, core photos showing details of the sedimentary structures in cores 729 and 731 and Correlation between core 731 and MD6
Fjord systems and archives: a review
<p>Fjords are glacially over-deepened semi-enclosed marine basins, typically with entrance sills separating their deep waters
from the adjacent coastal waters which restrict water circulation and thus oxygen renewal. The location of fjords is principally
controlled by the occurrence of ice sheets, either modern or ancestral. Fjords are therefore geomorphological features that
represent the transition from the terrestrial to the marine environment and, as such, have the potential to preserve evidence
of environmental change. Typically, most fjords have been glaciated a number of times and some high-latitude fjords still
possess a resident glacier. In most cases, glacial erosion through successive glacial/interglacial cycles has ensured the
removal of sediment sequences within the fjord. Hence the stratigraphic record in fjords largely preserves a glacial-deglacial
cycle of deposition over the last 18 ka or so. Sheltered water and high sedimentation rates have the potential to make fjords
ideal depositional environments for preserving continuous records of climate and environmental change with high temporal resolution.
In addition to acting as high-resolution environmental archives, fjords can also be thought of as mini-ocean sedimentary basin
laboratories. Fjords remain an understudied and often neglected sedimentary realm. With predictions of warming climates, changing
ocean circulation and rising sea levels, this volume is a timely look at these environmentally sensitive coastlines.
</p
Fjord systems and archives: a review
<p>Fjords are glacially over-deepened semi-enclosed marine basins, typically with entrance sills separating their deep waters
from the adjacent coastal waters which restrict water circulation and thus oxygen renewal. The location of fjords is principally
controlled by the occurrence of ice sheets, either modern or ancestral. Fjords are therefore geomorphological features that
represent the transition from the terrestrial to the marine environment and, as such, have the potential to preserve evidence
of environmental change. Typically, most fjords have been glaciated a number of times and some high-latitude fjords still
possess a resident glacier. In most cases, glacial erosion through successive glacial/interglacial cycles has ensured the
removal of sediment sequences within the fjord. Hence the stratigraphic record in fjords largely preserves a glacial-deglacial
cycle of deposition over the last 18 ka or so. Sheltered water and high sedimentation rates have the potential to make fjords
ideal depositional environments for preserving continuous records of climate and environmental change with high temporal resolution.
In addition to acting as high-resolution environmental archives, fjords can also be thought of as mini-ocean sedimentary basin
laboratories. Fjords remain an understudied and often neglected sedimentary realm. With predictions of warming climates, changing
ocean circulation and rising sea levels, this volume is a timely look at these environmentally sensitive coastlines.
</p
Discovery of Selective RNA-Binding Small Molecules by Affinity-Selection Mass Spectrometry
Recent
advances in understanding the relevance of noncoding RNA
(ncRNA) to disease have increased interest in drugging ncRNA with
small molecules. The recent discovery of ribocil, a structurally distinct
synthetic mimic of the natural ligand of the flavin mononucleotide
(FMN) riboswitch, has revealed the potential chemical diversity of
small molecules that target ncRNA. Affinity-selection mass spectrometry
(AS-MS) is theoretically applicable to high-throughput screening (HTS)
of small molecules binding to ncRNA. Here, we report the first application
of the Automated Ligand Detection System (ALIS), an indirect AS-MS
technique, for the selective detection of small molecule–ncRNA
interactions, high-throughput screening against large unbiased small-molecule
libraries, and identification and characterization of novel compounds
(structurally distinct from both FMN and ribocil) that target the
FMN riboswitch. Crystal structures reveal that different compounds
induce various conformations of the FMN riboswitch, leading to different
activity profiles. Our findings validate the ALIS platform for HTS
screening for RNA-binding small molecules and further demonstrate
that ncRNA can be broadly targeted by chemically diverse yet selective
small molecules as therapeutics