3,808 research outputs found
Kinematics of the Broad Line Region in M81
A new model is presented which explains the origin of the broad emission
lines observed in the LINER/Seyfert nucleus of M81 in terms of a steady state
spherically symmetric inflow, amounting to 1 x 10^-5 Msun/yr, which is
sufficient to explain the luminosity of the AGN. The emitting volume has an
outer radius of ~1 pc, making it the largest broad line region yet to be
measured, and it contains a total mass of ~ 5 x 10^-2 Msun of dense, ~ 10^8
cm^-3, ionized gas, leading to a very low filling factor of ~ 5 x 10^-9. The
fact that the BLR in M81 is so large may explain why the AGN is unable to
sustain the ionization seen there. Thus, the AGN in M81 is not simply a scaled
down quasar.Comment: Accepted for Publication in ApJ 7/21/0
Follow-up services for improving long-term outcomes in intensive care unit (ICU) survivors
This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:
Our main objective is to assess the effectiveness of follow-up services for ICU survivors that aim to identify and address unmet health needs related to the ICU period. We aim to assess the effectiveness in relation to health-related quality of life, mortality, depression and anxiety, post-traumatic stress disorder, physical function, cognitive function, ability to return to work or education and adverse events.
Our secondary objectives are, in general, to examine both the various ways that follow-up services are provided and any major influencing factors. Specifically, we aim to explore: the effectiveness of service organisation (physician versus nurse led, face to face versus remote, timing of follow-up service); possible differences in services related to country (developed versus developing country); and whether participants had delirium within the ICU setting
Sequence of the mouse Q4 class I gene and characterization of the gene product
The Q4 class I gene has been shown to participate
in gene conversion events within the mouse major
histocompatibility complex. Its complete genomic nucleotide
sequence has been determined. The 5' half of Q4
resembles H-2 genes more strongly than other Q genes.
Its 3' end, in contrast, is Q-like and contains a translational
stop signal in exon 5 which predicts a polypeptide with
an incomplete membrane spanning segment. The presence
of two inverted B1 repeats suggests that part of the Q4
gene may be mobile within the genome. Gene transfer experiments
have shown that the Q4 gene encodes a
Ăź2-microglobulin associated polypeptide of Mr 41 000. A
similar protein was found in activated mouse spleen cells.
The Q4 polypeptide was found to be secreted both by
spleen cells and by transfected fibroblasts and was not detectable
on the cell surface. Antibody binding and twodimensional
gel electrophoresis indicate that the Q4
molecule is identical to a mouse class I polypeptide, Qb-1,
which has been previously described
The determination of organic phosphorus in sea water with perchloric acid oxidation
A method is proposed for the determination of organic phosphorus in sea water; in this procedure the organic material is oxidized with perchloric acid and the organic phosphorus is converted to phosphate. Oxidation in a perchloric acid medium ia superior to sulfuric acid: (a) The perchlorate salts formed upon digestion of sea water are readily water-soluble in contrast to certain sulfates; (b) A small blank correction for impurities must be applied...
Chemistry by Mobile Phone (or how to justify more time at the bar)
By combining automatic environment monitoring with Java smartphones a system has been produced for the real-time monitoring of experiments whilst away from the lab. Changes in the laboratory environment are encapsulated as simple XML messages, which are published using an MQTT compliant broker. Clients subscribe to the MQTT stream, and produce a user display. An MQTT client written for the Java MIDP platform, can be run on a smartphone with a GPRS Internet connection, freeing us from the constraints of the lab. We present an overview of the technologies used, and how these are helping chemists make the best use of their time
Practical Pedagogy for Embedding Drone Technology into a Business and Computing Curriculum
This paper outlines the design of an undergraduate module in "Applied Drone Technology‟ to enhance student engagement and learning of a new technology within a business school curriculum. It focuses on the development strategy and issues the team encountered when trying to create something outside the usual core computing and business curriculum. Although there are barriers and issues to integrating drones into a curriculum, it can be accomplished with proper planning and a strategic vision. The result was a module that can be used by students in a business school, but with the capability of being used by students in other academic units
An anatomy of change : profiling cohort difference in beliefs and attitudes among Anglicans in England
Conservatism in theological belief, moral values and attitude
toward ecclesiastical practices was measured in a sample of
5967 ordained and lay Anglicans in the Church of England.
Average scores were compared between those who classed
themselves as Anglo-catholic, broad church or evangelical,
and by six different age cohorts. Overall, most measures of
conservatism showed decline among more recent cohorts,
but there were marked differences between traditions.
Younger evangelicals showed little or no decline in theological
or moral conservatism, and, in the case of Bible beliefs,
were more conservative than their older counterparts. In
ecclesiastical variables, however, Anglo-catholics were often
more conservative and younger evangelicals showed less
conservatism than other traditions or older evangelicals. The
findings suggest that the divide between traditions is
increasing among younger generations mainly because those
in Anglo-catholic and broad-church traditions are becoming
more liberal on theological or moral matters, whereas
evangelicals are maintaining traditional conservative views
of theology and morality but becoming less traditional in
matters ecclesiastical
Architecture and Conservation of the Bacterial DNA Replication Machinery, an Underexploited Drug Target
New antibiotics with novel modes of action are required to combat the growing threat posed by multi-drug resistant bacteria. Over the last decade, genome sequencing and other high-throughput techniques have provided tremendous insight into the molecular processes underlying cellular functions in a wide range of bacterial species. We can now use these data to assess the degree of conservation of certain aspects of bacterial physiology, to help choose the best cellular targets for development of new broad-spectrum antibacterials
Architecture and conservation of the bacterial DNA replication machinery, an underexploited drug target
New antibiotics with novel modes of action are required to combat the growing threat posed by multi-drug resistant bacteria. Over the last decade, genome sequencing and other high-throughput techniques have provided tremendous insight into the molecular processes underlying cellular functions in a wide range of bacterial species. We can now use these data to assess the degree of conservation of certain aspects of bacterial physiology, to help choose the best cellular targets for development of new broad-spectrum antibacterials. DNA replication is a conserved and essential process, and the large number of proteins that interact to replicate DNA in bacteria are distinct from those in eukaryotes and archaea; yet none of the antibiotics in current clinical use acts directly on the replication machinery. Bacterial DNA synthesis thus appears to be an underexploited drug target. However, before this system can be targeted for drug design, it is important to understand which parts are conserved and which are not, as this will have implications for the spectrum of activity of any new inhibitors against bacterial species, as well as the potential for development of drug resistance. In this review we assess similarities and differences in replication components and mechanisms across the bacteria, highlight current progress towards the discovery of novel replication inhibitors, and suggest those aspects of the replication machinery that have the greatest potential as drug targets
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