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  • 1
    Publication Date: 2015-10-16
    Description: We present the extended source catalogue for the UKIRT Wide Field Infrared Survey for H 2 (UWISH2). The survey is unbiased along the inner Galactic Plane from $l \approx 357\deg$ to $l \approx 65\deg$ and | b | ≤ 1 $_{.}^{\circ}$ 5 and covers 209 deg 2 . A further 42.0 and 35.5 deg 2 of high dust column density regions have been targeted in Cygnus and Auriga. We have identified 33 200 individual extended H 2  features. They have been classified to be associated with about 700 groups of jets and outflows, 284 individual (candidate) planetary nebulae, 30 supernova remnants and about 1300 photodissociation regions. We find a clear decline of star formation activity (traced by H 2  emission from jets and photodissociation regions) with increasing distance from the Galactic Centre. About 60 per cent of the detected candidate planetary nebulae have no known counterpart and 25 per cent of all supernova remnants have detectable H 2  emission associated with them.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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  • 2
    Publication Date: 2018-11-09
    Description: The paper explored the usefulness of Artificial neural network (ANN) in predicting the frame displacements under seismic load. The acceleration that is relatively easy to measure is used as the input value and the displacements that can be used to intuitively judge the condition of structures is used as the output value. The methodology utilized the universal function approximation ability of ANN for defining the relations between two data. For training of ANN, learning data consisting of acceleration and displacements are calculated from a verified finite element model under various seismic loads. The performance of the trained ANN was evaluated by comparing the displacements from ANN and FEM for seismic loads not used for training. The study showed that the ANN trained by various seismic loads can predicts the displacements from the acceleration for the new seismic loads. The trained ANN can be used for predicting the displacements of various buildings exposed to seismic loads...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 3
    Publication Date: 2013-09-10
    Description: Replication fork maintenance pathways preserve chromosomes, but their faulty application at nonallelic repeats could generate rearrangements causing cancer, genomic disorders and speciation. Potential causal mechanisms are homologous recombination and error-free postreplication repair (EF-PRR). Homologous recombination repairs damage-induced DNA double-strand breaks (DSBs) and single-ended DSBs within replication. To facilitate homologous recombination, the recombinase RAD51 and mediator BRCA2 form a filament on the 3' DNA strand at a break to enable annealing to the complementary sister chromatid while the RecQ helicase, BLM (Bloom syndrome mutated) suppresses crossing over to prevent recombination. Homologous recombination also stabilizes and restarts replication forks without a DSB. EF-PRR bypasses DNA incongruities that impede replication by ubiquitinating PCNA (proliferating cell nuclear antigen) using the RAD6-RAD18 and UBC13-MMS2-RAD5 ubiquitin ligase complexes. Some components are common to both homologous recombination and EF-PRR such as RAD51 and RAD18. Here we delineate two pathways that spontaneously fuse inverted repeats to generate unstable chromosomal rearrangements in wild-type mouse embryonic stem (ES) cells. Gamma-radiation induced a BLM-regulated pathway that selectively fused identical, but not mismatched, repeats. By contrast, ultraviolet light induced a RAD18-dependent pathway that efficiently fused mismatched repeats. Furthermore, TREX2 (a 3'--〉5' exonuclease) suppressed identical repeat fusion but enhanced mismatched repeat fusion, clearly separating these pathways. TREX2 associated with UBC13 and enhanced PCNA ubiquitination in response to ultraviolet light, consistent with it being a novel member of EF-PRR. RAD18 and TREX2 also suppressed replication fork stalling in response to nucleotide depletion. Interestingly, replication fork stalling induced fusion for identical and mismatched repeats, implicating faulty replication as a causal mechanism for both pathways.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3805358/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3805358/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Lingchuan -- Kim, Tae Moon -- Son, Mi Young -- Kim, Sung-A -- Holland, Cory L -- Tateishi, Satoshi -- Kim, Dong Hyun -- Yew, P Renee -- Montagna, Cristina -- Dumitrache, Lavinia C -- Hasty, Paul -- 1 R01 CA123203-01A1/CA/NCI NIH HHS/ -- 2P01AG017242-12/AG/NIA NIH HHS/ -- P30 CA054174/CA/NCI NIH HHS/ -- P30CA013330/CA/NCI NIH HHS/ -- R01 CA123203/CA/NCI NIH HHS/ -- England -- Nature. 2013 Sep 26;501(7468):569-72. doi: 10.1038/nature12500. Epub 2013 Sep 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine/Institute of Biotechnology, The Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, Texas 78245-3207, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24013173" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosomal Instability/*genetics ; Chromosome Breakage ; Chromosomes, Mammalian/*genetics ; DNA Breaks, Double-Stranded ; DNA Repair/*genetics ; DNA Replication/*genetics ; DNA-Binding Proteins/metabolism ; Embryonic Stem Cells/metabolism ; Exodeoxyribonucleases/metabolism ; Homologous Recombination/*genetics ; Hydroxyurea/pharmacology ; Inverted Repeat Sequences/*genetics ; Mice ; Nucleotides/deficiency/metabolism ; Proliferating Cell Nuclear Antigen/metabolism ; Rad51 Recombinase/metabolism ; RecQ Helicases/metabolism ; Ubiquitin-Conjugating Enzymes/metabolism ; Ubiquitination/radiation effects ; Ultraviolet Rays
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Gene 151 (1994), S. 267-271 
    ISSN: 0378-1119
    Keywords: GPIIIa ; RGD motif ; fibrinogen ; fibronectin ; platelet
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 62 (1993), S. 1176-1178 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A self-electro-optic effect device (SEED) epistructure grown by low-pressure metalorganic vapor phase epitaxy (MOVPE) is demonstrated. The symmetric SEED using GaAs/Al0.04Ga0.96As shallow quantum well (SQW) exhibits a contrast ratio of 2.9 at 5 V bias with 50 pairs of GaAs wells. This high contrast results from the low background carrier concentration of absorption region which is obtained by the temperature controlled compensation of the acceptors and donors. The absorption data suggest that the MOVPE technique is comparable to the MBE technique in growing the high performance SQW epistructure.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 2016-07-28
    Description: Whole-genome sequencing data allow detection of copy number variation (CNV) at high resolution. However, estimation based on read coverage along the genome suffers from bias due to GC content and other factors. Here, we develop an algorithm called BIC-seq2 that combines normalization of the data at the nucleotide level and Bayesian information criterion-based segmentation to detect both somatic and germline CNVs accurately. Analysis of simulation data showed that this method outperforms existing methods. We apply this algorithm to low coverage whole-genome sequencing data from peripheral blood of nearly a thousand patients across eleven cancer types in The Cancer Genome Atlas (TCGA) to identify cancer-predisposing CNV regions. We confirm known regions and discover new ones including those covering KMT2C, GOLPH3, ERBB2 and PLAG1 . Analysis of colorectal cancer genomes in particular reveals novel recurrent CNVs including deletions at two chromatin-remodeling genes RERE and NPM2 . This method will be useful to many researchers interested in profiling CNVs from whole-genome sequencing data.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
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  • 7
    Publication Date: 1993-03-15
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
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  • 8
  • 9
    Publication Date: 2015-01-24
    Description: Fanconi anemia (FA) patients exhibit bone marrow failure, developmental defects and cancer. The FA pathway maintains chromosomal stability in concert with replication fork maintenance and DNA double strand break (DSB) repair pathways including RAD51-mediated homologous recombination (HR). RAD51 is a recombinase that maintains replication forks and repairs DSBs, but also rearranges chromosomes. Two RecQ helicases, RECQL5 and Bloom syndrome mutated (BLM) suppress HR through nonredundant mechanisms. Here we test the impact deletion of RECQL5 and BLM has on mouse embryonic stem (ES) cells deleted for FANCB, a member of the FA core complex. We show that RECQL5, but not BLM, conferred resistance to mitomycin C (MMC, an interstrand crosslinker) and camptothecin (CPT, a type 1 topoisomerase inhibitor) in FANCB-defective cells. RECQL5 suppressed, while BLM caused, breaks and radials in FANCB-deleted cells exposed to CPT or MMC, respectively. RECQL5 protected the nascent replication strand from MRE11-mediated degradation and restarted stressed replication forks in a manner additive to FANCB. By contrast BLM restarted, but did not protect, replication forks in a manner epistatic to FANCB. RECQL5 also lowered RAD51 levels in FANCB-deleted cells at stressed replication sites implicating a rearrangement avoidance mechanism. Thus, RECQL5 and BLM impact FANCB-defective cells differently in response to replication stress with relevance to chemotherapeutic regimes.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
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  • 10
    Publication Date: 2012-04-25
    Description: Uterine leiomyomata (UL), the most common neoplasm in reproductive-age women, are classified into distinct genetic subgroups based on recurrent chromosome abnormalities. To develop a molecular signature of UL with t(12;14)(q14-q15;q23-q24), we took advantage of the multiple UL arising as independent clonal lesions within a single uterus. We compared genome-wide expression levels of t(12;14) UL to non-t(12;14) UL from each of nine women in a paired analysis, with each sample weighted for the percentage of t(12;14) cells to adjust for mosaicism with normal cells. This resulted in a transcriptional profile that confirmed HMGA2 , known to be overexpressed in t(12;14) UL, as the most significantly altered gene. Pathway analysis of the differentially expressed genes showed significant association with cell proliferation, particularly G1/S checkpoint regulation. This is consistent with the known larger size of t(12;14) UL relative to karyotypically normal UL or to UL in the deletion 7q22 subgroup. Unsupervised hierarchical clustering demonstrated that patient variability is relatively dominant to the distinction of t(12;14) UL compared with non-t(12;14) UL or of t(12;14) UL compared with del(7q) UL. The paired design we employed is therefore important to produce an accurate t(12;14) UL-specific gene list by removing the confounding effects of genotype and environment. Interestingly, myometrium not only clustered away from the tumors, but generally separated based on associated t(12;14) versus del(7q) status. Nine genes were identified whose expression can distinguish the myometrium origin. This suggests an underlying constitutional genetic predisposition to these somatic changes which could potentially lead to improved personalized management and treatment.
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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