Lawrence Berkeley National Laboratory最新文献

{"title":"It's SO Easy Being Green: Low and No Cost Solutions","authors":"Megan Kennedy","doi":"10.2172/1010931","DOIUrl":"https://doi.org/10.2172/1010931","url":null,"abstract":"It’s SO Easy Being Green Low and No Cost Solutions Megan Kennedy 1, 3 , Christine Naca 2, 3 Lawrence Livermore National Laboratory Lawrence Berkeley National Laboratory DOE Joint Genome Institute March 2011 The work conducted by the U.S. Department of Energy Joint Genome Institute is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02- 05CH112","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73106140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Gut Microbiota: Ecology and Function","authors":"B. Willing, J. Jansson","doi":"10.1128/9781555816865.CH3","DOIUrl":"https://doi.org/10.1128/9781555816865.CH3","url":null,"abstract":"The Gut Microbiota: Ecology and Function Benjamin P. Willing 1 and Janet K. Jansson 2 Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada V6T 1Z4. Department of Ecology, Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720. J.K. Jansson’s work is partially supported by the U.S. Department of Energy and LBNL under Contract No. DE- AC02-05CH11231.","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"13 1","pages":"39-65"},"PeriodicalIF":0.0,"publicationDate":"2011-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75482348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Orbital Moment Determination in (MnxFe1-x)3O4 Nanoparticles","authors":"V. L. Pool","doi":"10.1063/1.3562905","DOIUrl":"https://doi.org/10.1063/1.3562905","url":null,"abstract":"JOURNAL OF APPLIED PHYSICS 109, 07B532 (2011) Orbital moment determination in (Mn x Fe 12x ) 3 O 4 nanoparticles V. L. Pool, 1,2,a) C. Jolley, 3,4 T. Douglas, 2,3 E. A. Arenholz, 5 and Y. U. Idzerda 1,2 Department of Physics, Montana State University, Bozeman, Montana 59717, USA Center for Bio-inspired Nanomaterials, Montana State University, Bozeman, Montana 59717, USA Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA Astrobiology Biogeocatalysis Research Center, Montana State University, Bozeman, Montana 59717, USA Advanced Light Source, Lawrence Berkeley National Labs, Berkeley, California 94720, USA (Presented 17 November 2010; received 24 September 2010; accepted 8 December 2010; published online 7 April 2011) Nanoparticles of (Mn x Fe 1Ax ) 3 O 4 with a concentration ranging from x ¼ 0 to 1 and a crystallite size of 14–15 nm were measured using X-ray absorption spectroscopy and X-ray magnetic circular dichroism to determine the ratio of the orbital moment to the spin moment for Mn and Fe. At low Mn concentrations, the Mn substitutes into the host Fe 3 O 4 spinel structure as Mn 2þ in the tetrahedral A-site. The net Fe moment, as identified by the X-ray dichrosim intensity, is found to increase at the lowest Mn concentrations then rapidly decrease until no dichroism is observed at 20% Mn. The average Fe orbit/spin moment ratio is determined to initially be negative and small for pure Fe 3 O 4 nanoparticles and quickly go to 0 by 5%–10% Mn addition. The average Mn moment is anti-aligned to the Fe moment with an orbit/spin moment ratio of 0.12 which gradually C decreases with Mn concentration. V 2011 American Institute of Physics. [doi:10.1063/1.3562905] I. INTRODUCTION The doping of spinel ferrite nanoparticles (c-Fe 2 O 3 and Fe 3 O 4 ) with magnetic and nonmagnetic substitutional transi- tion metals has demonstrated good control of both moment and anisotropy, 1 with magnetic behavior and dopant occu- pancy sites often quite different from the bulk behavior. One example is for the biomineralization of (Mn x Fe 1Ax ) 3 O 4 nano- particles inside protein cage structures, where Mn initially substitutes as Mn 2þ into the octahedral B-site causing the moment to decrease instead of as Mn 2þ in the tetrahedral A-site, 1 creating an enhanced moment as occurs in the bulk. 2 It is unclear whether these differences are due to the gentle synthesis conditions of biomineralization, the presence of the protein encapsulation, or the reduced dimensionality of nanoparticles. A comparison of dopant occupation sites and anisotropy energies of similar nanoparticles synthesized under different conditions would be useful. For noninteracting particles, frequency dependent ac- susceptibility measurements are a useful way to determine anisotropy energies. 1,3 A related parameter to the magneto- crystalline anisotropy energy is the elemental orbital mag- netic moment as determined from energy integration of the X-ray magnet","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"79 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75114131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Public Health Benefits of End-Use Electrical Energy Efficiency in California: An Exploratory Study","authors":"T. McKone, A. Lobscheid","doi":"10.2172/1010620","DOIUrl":"https://doi.org/10.2172/1010620","url":null,"abstract":"LBNL59669 ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY J Public Health Benefits of End- Use Electrical Energy Efficiency in California: An Exploratory Study Agnes B. Lobscheid Thomas E. McKone ; Environmental Energy Technologies Division · June 2006 This work was supported by the California Energy Commission and the US Environmental Protection Agency through the U.S. Department of Energy under Contract No. DE-AC02- OSCH11231.","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79527501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Magnetism of Fe3O4 Nanoparticles with Ga Doping","authors":"V. L. Pool, M. Klem, C. Chorney, E. Arenholz, Y. Idzerda","doi":"10.1063/1.3562196","DOIUrl":"https://doi.org/10.1063/1.3562196","url":null,"abstract":"JOURNAL OF APPLIED PHYSICS 109, 07B529 (2011) Enhanced magnetism of Fe 3 O 4 nanoparticles with Ga doping V. L. Pool, 1,a) M. T. Klem, 2,3 C. L. Chorney, 2,3 E. A. Arenholz, 4 and Y. U. Idzerda 1 Department of Physics, Montana State University, Bozeman, Montana 59715, USA Department of Chemistry and Geochemistry, Montana Tech, Butte, Montana 59701, USA Center for Advanced Supramolecular and Nano Systems, Montana Tech, Butte, Montana 59715, USA Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA (Presented 18 November 2010; received 22 October 2010; accepted 1 December 2010; published online 5 April 2011) Magnetic (Ga x Fe 1Ax ) 3 O 4 nanoparticles with 5%–33% gallium doping (x ¼ 0.05–0.33) were measured using x-ray absorption spectroscopy and x-ray magnetic circular dichroism to determine that the Ga dopant is substituting for Fe 3þ as Ga 3þ in the tetrahedral A-site of the spinel structure, resulting in an overall increase in the total moment of the material. Frequency-dependent alternating-current magnetic susceptibility measurements showed these particles to be weakly interacting with a reduction of the cubic anisotropy energy term with Ga concentration. The element-specific dichroism spectra show that the average Fe moment is observed to increase C with Ga concentration, a result consistent with the replacement of A-site Fe by Ga. V 2011 American Institute of Physics. [doi:10.1063/1.3562196] I. INTRODUCTION Gallium doped iron oxide, (Ga x Fe 1Ax ) 3 O 4 , is interesting as it exhibits an energy-dependent photoabsorption as a func- tion of Ga concentration in bulk samples. 1 This property could be advantageous in nanoparticles providing utility for applications. Additionally, Ga-based mixed oxides have shown interesting catalytic behavior, an application that nano- particles are known to be exceptional for due to their large sur- face-to-volume ratio. 2–4 Furthermore, the doping of magnetic nanoparticles can have behaviors distinct from bulk alloys, including changes in dopant site occupation and different varia- tions of moment and anisotropy with doping concentration, making them interesting from a purely scientific standpoint. Bulk (Ga x Fe 1Ax ) 3 O 4 magnetic trends have not been fully studied, but Ga is typically present as a 3þ valence ion so it is likely to be present as a 3þ valence ion given the two options in the spinel structure. 1 The effect on the magnetic properties of doping Fe 3 O 4 with other nonmagnetic transi- tion metals of similar ionic radii, such as Zn, show that Zn preferentially substitutes for Fe 3þ as Zn 2þ in the tetrahedral coordination. For bulk Zn doped Fe 3 O 4 the total moment per unit cell increases as the tetrahedral sites become occupied by the nonmagnetic transition metal. 5 These substitutional atoms no longer partially cancel the Fe moment in the octa- hedral coordination. For Zn doping the average moment of the octahedral Fe sites also slightly increases as charge","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76029881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arsenic chemistry in soils and sediments","authors":"S. Fendorf, P. Nico, B. Kocar, Yoko Masue, K. Tufano","doi":"10.1016/S0166-2481(10)34012-8","DOIUrl":"https://doi.org/10.1016/S0166-2481(10)34012-8","url":null,"abstract":"","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"9 1","pages":"357-378"},"PeriodicalIF":0.0,"publicationDate":"2011-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76722146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Illumina GA IIx & HiSeq 2000 Production Sequenccing and QC Analysis Pipelines at the DOE Joint Genome Institute","authors":"C. Daum, Matthew Zane, James E. Han, Megan Kennedy, Matthew San Diego, A. Copeland, Mingkun Li, S. Lucas","doi":"10.2172/1010544","DOIUrl":"https://doi.org/10.2172/1010544","url":null,"abstract":"The U.S. Department of Energy (DOE) Joint Genome Institute's (JGI) Production Sequencing group is committed to the generation of high-quality genomic DNA sequence to support the mission areas of renewable energy generation, global carbon management, and environmental characterization and clean-up. Within the JGI's Production Sequencing group, a robust Illumina Genome Analyzer and HiSeq pipeline has been established. Optimization of the sesequencer pipelines has been ongoing with the aim of continual process improvement of the laboratory workflow, reducing operational costs and project cycle times to increases ample throughput, and improving the overall quality of the sequence generated. A sequence QC analysis pipeline has been implemented to automatically generate read and assembly level quality metrics. The foremost of these optimization projects, along with sequencing and operational strategies, throughput numbers, and sequencing quality results will be presented.","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77464353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems","authors":"Liange Zheng, N. Spycher, Tianfu Xu, J. Apps, Y. Kharaka, J. Birkholzer","doi":"10.2172/1010545","DOIUrl":"https://doi.org/10.2172/1010545","url":null,"abstract":"LBNL-4339E Ernest Orlando Lawrence Berkeley National Laboratory Technical Report November 2010 Modeling Studies on the Transport of Benzene and H 2 S in CO 2 -Water Systems Lawrence Berkeley National Laboratory (LBNL) Contact: Jens T. Birkholzer Ph: (510) 486-7134 Email: jtbirkholzer@lbl.gov Authors: Liange Zheng, Nicolas Spycher, Jens Birkholzer, Tianfu Xu, John Apps (LBNL) Yousif Kharaka (USGS) Submitted to: U.S. Environmental Protection Agency EPA Project Manager: Sean Porse","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75256269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular Basis for Enhancement of the Meiotic DMCI Recombinase by RAD51AP1","authors":"Eloise V. Dray, Myun Hwa Dunlop, L. Kauppi, J. S. Filippo, C. Wiese, M. Tsai, S. Begović, D. Schild, M. Jasin, S. Keeney, P. Sung","doi":"10.2172/1011037","DOIUrl":"https://doi.org/10.2172/1011037","url":null,"abstract":"Homologous recombination is needed for meiotic chromosome segregation, genome maintenance, and tumor suppression. RAD51AP1 (RAD51 Associated Protein 1) has been shown to interact with and enhance the recombinase activity of RAD51. Accordingly, genetic ablation of RAD51AP1 leads to enhanced sensitivity to and also chromosome aberrations upon DNA damage, demonstrating a role for RAD51AP1 in mitotic homologous recombination. Here we show physical association of RAD51AP1 with the meiosis-specific recombinase DMC1 and a stimulatory effect of RAD51AP1 on the DMC1-mediated D-loop reaction. Mechanistic studies have revealed that RAD51AP1 enhances the ability of the DMC1 presynaptic filament to capture the duplex DNA partner and to assemble the synaptic complex, in which the recombining DNA strands are homologously aligned. We also provide evidence that functional co-operation is dependent on complex formation between DMC1 and RAD51AP1, and that distinct epitopes in RAD51AP1 mediate interactions with RAD51 and DMC1. Finally, we show that RAD51AP1 is expressed in mouse testes, and that RAD51AP1 foci co-localize with a subset of DMC1 foci in spermatocytes. These results suggest that RAD51AP1 also serves an important role in meiotic homologous recombination.","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84032718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High performance solar control office windows","authors":"W. J. King","doi":"10.2172/6763789","DOIUrl":"https://doi.org/10.2172/6763789","url":null,"abstract":"LBL-7825 UC-95d TID-4500-R66 TWO-WEEK LOAN COpy This is a Library Circulating Copy which may be borrowed for two weeks. For a personal retention copy, call Tech. Info. Diuision, Ext. 782 Environment Division High Performance Solar Control Office Windows William King December 1977 C'e Berkeley Prepa boratory University of California/Berkeley r t::;t:; r I the U.S. Department of Energy under Contract No. W-7405-ENG-48 '-J .Il","PeriodicalId":17982,"journal":{"name":"Lawrence Berkeley National Laboratory","volume":"136 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84032935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}