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  • 1
    Publication Date: 2015-09-30
    Description: To demonstrate a Mixed Axial and Radial field System (MARS) as the best magnet scheme for future ECRISs, MARS-D, a demonstrative ECRIS using a NbTi MARS magnet is progressing at Lawrence Berkeley National Laboratory. An optimized MARS design can use either NbTi or Nb 3 Sn coils with reduced engineering complexities to construct the needed high-field magnets. The optimized magnet design could enhance MARS-D to a next generation ECRIS by producing minimum-B field maxima of 5.6 T axially and 3.2 T radially for operating frequencies up to 45 GHz. In-progress test winding has achieved a milestone demonstrating the fabrication feasibility of a MARS closed-loop coil.
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
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  • 2
    Publication Date: 2011-10-05
    Description: Author(s): A. Lemut, M. Couder, D. Winklehner, U. Greife, A. Hodgkinson, D. Leitner, M. Leitner, J. S. Saba, P. A. Vetter, W. L. Waldron, and M. Wiescher [Phys. Rev. ST Accel. Beams 14, 100101] Published Tue Oct 04, 2011
    Keywords: Low- and Intermediate-Energy Accelerators
    Electronic ISSN: 1098-4402
    Topics: Physics
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  • 3
    Publication Date: 2015-12-02
    Description: The long-term operation of high charge state electron cyclotron resonance ion sources fed with high microwave power has caused damage to the plasma chamber wall in several laboratories. Porosity, or a small hole, can be progressively created in the chamber wall which can destroy the plasma chamber over a few year time scale. A burnout of the VENUS plasma chamber is investigated in which the hole formation in relation to the local hot electron power density is studied. First, the results of a simple model assuming that hot electrons are fully magnetized and strictly following magnetic field lines are presented. The model qualitatively reproduces the experimental traces left by the plasma on the wall. However, it is too crude to reproduce the localized electron power density for creating a hole in the chamber wall. Second, the results of a Monte Carlo simulation, following a population of scattering hot electrons, indicate a localized high power deposited to the chamber wall consistent with the hole formation process. Finally, a hypervapotron cooling scheme is proposed to mitigate the hole formation in electron cyclotron resonance plasma chamber wall.
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
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  • 4
    Publication Date: 2011-04-27
    Description: Structurally diverse libraries of novel small molecules represent important sources of biologically active agents. In this paper we report the development of a diversity-oriented synthesis strategy for the generation of diverse small molecules based around a common macrocyclic peptidomimetic framework, containing structural motifs present in many naturally occurring bioactive compounds. Macrocyclic peptidomimetics are largely underrepresented in current small-molecule screening collections owing primarily to synthetic intractability; thus novel molecules based around these structures represent targets of significant interest, both from a biological and a synthetic perspective. In a proof-of-concept study, the synthesis of a library of 14 such compounds was achieved. Analysis of chemical space coverage confirmed that the compound structures indeed occupy underrepresented areas of chemistry in screening collections. Crucial to the success of this approach was the development of novel methodologies for the macrocyclic ring closure of chiral α-azido acids and for the synthesis of diketopiperazines using solid-supported N methylmorpholine. Owing to their robust and flexible natures, it is envisaged that both new methodologies will prove to be valuable in a wider synthetic context.
    Keywords: Organic Synthesis Toward Small-Molecule Probes and Drugs Special Feature
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 5
    Publication Date: 2013-10-16
    Description: Identification of genes influencing complex traits is hampered by genetic heterogeneity, the modest effect size of many alleles, and the likely involvement of rare and uncommon alleles. Etiologic complexity can be simplified in model organisms. By genomic sequencing, linkage analysis, and functional validation, we identified that genetic variation of Grm2,...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 6
    Publication Date: 2000-04-28
    Description: Schizophrenia is a complex disorder, and there is substantial evidence supporting a genetic etiology. Despite this, prior attempts to localize susceptibility loci have produced predominantly suggestive findings. A genome-wide scan for schizophrenia susceptibility loci in 22 extended families with high rates of schizophrenia provided highly significant evidence of linkage to chromosome 1 (1q21-q22), with a maximum heterogeneity logarithm of the likelihood of linkage (lod) score of 6.50. This linkage result should provide sufficient power to allow the positional cloning of the underlying susceptibility gene.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3787922/" 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/PMC3787922/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brzustowicz, L M -- Hodgkinson, K A -- Chow, E W -- Honer, W G -- Bassett, A S -- 53216/Canadian Institutes of Health Research/Canada -- K08 MH01392/MH/NIMH NIH HHS/ -- N01-HG-65403/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2000 Apr 28;288(5466):678-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular and Behavioral Neuroscience, Rutgers University, Newark, NJ 07102, USA. brzustowicz@axon.rutgers.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10784452" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Mapping ; Chromosomes, Human, Pair 1/*genetics ; Computer Simulation ; Female ; Genes, Dominant ; Genes, Recessive ; Genetic Heterogeneity ; Genetic Linkage ; Genetic Markers ; *Genetic Predisposition to Disease ; Humans ; Likelihood Functions ; Lod Score ; Male ; Models, Genetic ; Pedigree ; Schizophrenia/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 2010-12-24
    Description: Impulsivity, describing action without foresight, is an important feature of several psychiatric diseases, suicidality and violent behaviour. The complex origins of impulsivity hinder identification of the genes influencing it and the diseases with which it is associated. Here we perform exon-focused sequencing of impulsive individuals in a founder population, targeting fourteen genes belonging to the serotonin and dopamine domain. A stop codon in HTR2B was identified that is common (minor allele frequency 〉 1%) but exclusive to Finnish people. Expression of the gene in the human brain was assessed, as well as the molecular functionality of the stop codon, which was associated with psychiatric diseases marked by impulsivity in both population and family-based analyses. Knockout of Htr2b increased impulsive behaviours in mice, indicative of predictive validity. Our study shows the potential for identifying and tracing effects of rare alleles in complex behavioural phenotypes using founder populations, and indicates a role for HTR2B in impulsivity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3183507/" 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/PMC3183507/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bevilacqua, Laura -- Doly, Stephane -- Kaprio, Jaakko -- Yuan, Qiaoping -- Tikkanen, Roope -- Paunio, Tiina -- Zhou, Zhifeng -- Wedenoja, Juho -- Maroteaux, Luc -- Diaz, Silvina -- Belmer, Arnaud -- Hodgkinson, Colin A -- Dell'osso, Liliana -- Suvisaari, Jaana -- Coccaro, Emil -- Rose, Richard J -- Peltonen, Leena -- Virkkunen, Matti -- Goldman, David -- AA-09203/AA/NIAAA NIH HHS/ -- AA-12502/AA/NIAAA NIH HHS/ -- Z01 AA000301-09/Intramural NIH HHS/ -- Z01 AA000301-10/Intramural NIH HHS/ -- Z99 AA999999/Intramural NIH HHS/ -- England -- Nature. 2010 Dec 23;468(7327):1061-6. doi: 10.1038/nature09629.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, NIH, Rockville, Maryland 20852, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21179162" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Case-Control Studies ; Cell Line ; Female ; Finland ; Founder Effect ; Gene Expression Regulation ; Gene Knockout Techniques ; Genotype ; Humans ; Impulsive Behavior/*genetics ; Male ; Mental Disorders/genetics ; Mice ; Mice, 129 Strain ; Mice, Knockout ; Pedigree ; Polymorphism, Single Nucleotide/genetics ; Receptor, Serotonin, 5-HT2B/*genetics/*metabolism ; Testosterone/blood/cerebrospinal fluid
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2008-04-04
    Description: Understanding inter-individual differences in stress response requires the explanation of genetic influences at multiple phenotypic levels, including complex behaviours and the metabolic responses of brain regions to emotional stimuli. Neuropeptide Y (NPY) is anxiolytic and its release is induced by stress. NPY is abundantly expressed in regions of the limbic system that are implicated in arousal and in the assignment of emotional valences to stimuli and memories. Here we show that haplotype-driven NPY expression predicts brain responses to emotional and stress challenges and also inversely correlates with trait anxiety. NPY haplotypes predicted levels of NPY messenger RNA in post-mortem brain and lymphoblasts, and levels of plasma NPY. Lower haplotype-driven NPY expression predicted higher emotion-induced activation of the amygdala, as well as diminished resiliency as assessed by pain/stress-induced activations of endogenous opioid neurotransmission in various brain regions. A single nucleotide polymorphism (SNP rs16147) located in the promoter region alters NPY expression in vitro and seems to account for more than half of the variation in expression in vivo. These convergent findings are consistent with the function of NPY as an anxiolytic peptide and help to explain inter-individual variation in resiliency to stress, a risk factor for many diseases.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2715959/" 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/PMC2715959/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhou, Zhifeng -- Zhu, Guanshan -- Hariri, Ahmad R -- Enoch, Mary-Anne -- Scott, David -- Sinha, Rajita -- Virkkunen, Matti -- Mash, Deborah C -- Lipsky, Robert H -- Hu, Xian-Zhang -- Hodgkinson, Colin A -- Xu, Ke -- Buzas, Beata -- Yuan, Qiaoping -- Shen, Pei-Hong -- Ferrell, Robert E -- Manuck, Stephen B -- Brown, Sarah M -- Hauger, Richard L -- Stohler, Christian S -- Zubieta, Jon-Kar -- Goldman, David -- K01 MH072837/MH/NIMH NIH HHS/ -- K02-DA17232/DA/NIDA NIH HHS/ -- P01 HL040962/HL/NHLBI NIH HHS/ -- P50-DA16556/DA/NIDA NIH HHS/ -- PL1 DA024859/DA/NIDA NIH HHS/ -- PL1 DA024859-02/DA/NIDA NIH HHS/ -- R01 DA 016423/DA/NIDA NIH HHS/ -- R01 DE 15396/DE/NIDCR NIH HHS/ -- R01 HL065137/HL/NHLBI NIH HHS/ -- R01 MH074697/MH/NIMH NIH HHS/ -- R01 MH074697-04A1/MH/NIMH NIH HHS/ -- R01-AA13892/AA/NIAAA NIH HHS/ -- Z01 AA000301-09/Intramural NIH HHS/ -- Z99 AA999999/Intramural NIH HHS/ -- England -- Nature. 2008 Apr 24;452(7190):997-1001. doi: 10.1038/nature06858. Epub 2008 Apr 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Neurogenetics, NIAAA, NIH, Bethesda, Maryland 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18385673" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Anxiety/genetics ; Anxiety Disorders/genetics ; Brain/*metabolism/physiology/physiopathology ; *Emotions ; European Continental Ancestry Group/genetics ; Facial Expression ; Finland/ethnology ; Gene Expression Regulation/*genetics ; Genetic Variation/*genetics ; Haplotypes/genetics ; Humans ; Lymphocytes/metabolism ; Magnetic Resonance Imaging ; Male ; Neuropeptide Y/blood/*genetics ; Opioid Peptides/metabolism ; Pain/genetics ; Polymorphism, Single Nucleotide/genetics ; RNA, Messenger/genetics/metabolism ; Stress, Physiological/*genetics/psychology ; United States/ethnology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2014-04-26
    Description: Mutations in the mitochondrial genome are associated with multiple diseases and biological processes; however, little is known about the extent of sequence variation in the mitochondrial transcriptome. By ultra-deeply sequencing mitochondrial RNA (〉6000x) from the whole blood of ~1000 individuals from the CARTaGENE project, we identified remarkable levels of sequence variation within and across individuals, as well as sites that show consistent patterns of posttranscriptional modification. Using a genome-wide association study, we find that posttranscriptional modification of functionally important sites in mitochondrial transfer RNAs (tRNAs) is under strong genetic control, largely driven by a missense mutation in MRPP3 that explains ~22% of the variance. These results reveal a major nuclear genetic determinant of posttranscriptional modification in mitochondria and suggest that tRNA posttranscriptional modification may affect cellular energy production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hodgkinson, Alan -- Idaghdour, Youssef -- Gbeha, Elias -- Grenier, Jean-Christophe -- Hip-Ki, Elodie -- Bruat, Vanessa -- Goulet, Jean-Philippe -- de Malliard, Thibault -- Awadalla, Philip -- New York, N.Y. -- Science. 2014 Apr 25;344(6182):413-5. doi: 10.1126/science.1251110.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CHU Sainte-Justine Research Centre, Department of Pediatrics, Faculty of Medicine, Universite de Montreal, 3175 Chemin de la Cote-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24763589" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Base Sequence ; DNA, Mitochondrial/chemistry/genetics ; Female ; *Genetic Variation ; *Genome, Mitochondrial ; Genome-Wide Association Study ; High-Throughput Nucleotide Sequencing ; Humans ; Male ; Methylation ; Middle Aged ; Mutation, Missense ; Polymorphism, Single Nucleotide ; RNA/chemistry/*genetics/metabolism ; RNA Processing, Post-Transcriptional ; RNA, Transfer/chemistry/*genetics/metabolism ; Ribonuclease P/*genetics/metabolism ; Sequence Analysis, DNA ; Sequence Analysis, RNA ; Transcriptome
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2017-05-27
    Description: Soil phosphorus (P) fertility arising from historic P inputs is a major driver of P mobilisation in agricultural runoff and increases the risk of aquatic eutrophication. To determine the environmental benefit of lowering soil P fertility, a meta-analysis of the relationship between soil test P (measured as Olsen-P) and P concentrations in agricultural drainflow and surface runoff in mostly UK soils was undertaken in relation to current eutrophication control targets (30–35 µ g P L −1 ). At agronomic-optimum Olsen P (16–25 mg kg −1 ), concentrations of soluble reactive P (SRP), total dissolved P (TDP), total P (TP) and sediment-P (SS-P) in runoff were predicted by linear regression analysis to vary between 24 and 183 µ g L −1 , 38 and 315 µ g L −1 , 0.2 and 9.6 mg L −1 , and 0.31 and 3.2 g kg −1 , respectively. Concentrations of SRP and TDP in runoff were much more sensitive to changes in Olsen-P than were TP...
    Print ISSN: 1748-9318
    Electronic ISSN: 1748-9326
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering
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