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Maze L, Beckers D, Kogan V, Kharchenko A, Gateshki M. Nanomaterials analysis by combination of PDF and (U)SAXS. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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2
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Gateshki M, Beckers D, Kogan V. Instrumental effects in laboratory pair distribution function (PDF) analysis. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319088600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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3
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Kogan V, Millstein J, London SJ, Ober C, White SR, Naureckas ET, Gauderman WJ, Jackson DJ, Barraza-Villarreal A, Romieu I, Raby BA, Breton CV. Genetic-Epigenetic Interactions in Asthma Revealed by a Genome-Wide Gene-Centric Search. Hum Hered 2019; 83:130-152. [PMID: 30669148 PMCID: PMC7365350 DOI: 10.1159/000489765] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES There is evidence to suggest that asthma pathogenesis is affected by both genetic and epigenetic variation independently, and there is some evidence to suggest that genetic-epigenetic interactions affect risk of asthma. However, little research has been done to identify such interactions on a genome-wide scale. The aim of this studies was to identify genes with genetic-epigenetic interactions associated with asthma. METHODS Using asthma case-control data, we applied a novel nonparametric gene-centric approach to test for interactions between multiple SNPs and CpG sites simultaneously in the vicinities of 18,178 genes across the genome. RESULTS Twelve genes, PF4, ATF3, TPRA1, HOPX, SCARNA18, STC1, OR10K1, UPK1B, LOC101928523, LHX6, CHMP4B, and LANCL1, exhibited statistically significant SNP-CpG interactions (false discovery rate = 0.05). Of these, three have previously been implicated in asthma risk (PF4, ATF3, and TPRA1). Follow-up analysis revealed statistically significant pairwise SNP-CpG interactions for several of these genes, including SCARNA18, LHX6, and LOC101928523 (p = 1.33E-04, 8.21E-04, 1.11E-03, respectively). CONCLUSIONS Joint effects of genetic and epigenetic variation may play an important role in asthma pathogenesis. Statistical methods that simultaneously account for multiple variations across chromosomal regions may be needed to detect these types of effects on a genome-wide scale.
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Affiliation(s)
- Vladimir Kogan
- Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
| | - Joshua Millstein
- Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA,
| | - Stephanie J London
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, RTP, Research Triangle Park, North Carolina, USA
| | - Carole Ober
- Department of Human Genetics, University of Chicago, Chicago, Illinois, USA
| | - Steven R White
- Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | | | - W James Gauderman
- Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
| | - Daniel J Jackson
- University of Wisconsin School of Medicine and Public Health, Madison, Illinois, USA
| | - Albino Barraza-Villarreal
- Department of Environmental Health, Population Health Center, National Institute of Public Health of Mexico, Cuernavaca, Mexico
| | - Isabelle Romieu
- International Agency for Research on Cancer, Section of Nutrition and Metabolism, Lyon, France
| | - Benjamin A Raby
- Department of Medicine, Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Carrie V Breton
- Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
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Bolze J, Kogan V, Beckers D, Fransen M. High-performance small- and wide-angle X-ray scattering (SAXS/WAXS) experiments on a multi-functional laboratory goniometer platform with easily exchangeable X-ray modules. Rev Sci Instrum 2018; 89:085115. [PMID: 30184636 DOI: 10.1063/1.5041949] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 07/31/2018] [Indexed: 06/08/2023]
Abstract
Small-angle X-ray scattering (SAXS) is a well-established, versatile technique for the analysis of nanoscale structures and dimensions, e.g., in liquid dispersions, thin solid objects or powder samples. When combined with wide-angle X-ray scattering (WAXS), complementary information about the atomic structure can be obtained. SAXS experiments traditionally require dedicated instruments to achieve the desired angular resolution, sensitivity, stability, and speed of measurement. Here we demonstrate how a multi-functional laboratory goniometer platform, as widely being used for powder X-ray diffraction and for a variety of related techniques, can be configured with pre-aligned X-ray modules that enable advanced SAXS/WAXS experiments, without compromising the exceptional versatility of the instrument. Line and point collimation setups, as well as quick and easy switching between them, are readily possible. Key components are a detachable, evacuated beam path and a high-resolution, low-noise hybrid pixel area detector, in combination with a hardware interface design that allows to configure the instrument with different X-ray modules without the need for re-alignment. Software for SAXS data reduction and analysis was developed. The good SAXS/WAXS performance and the derived analytical results were verified on various test samples, such as gold nanoparticles, colloidal silica, liposomes, dilute protein solutions, and solid polymer samples. It is believed that this novel approach to SAXS/WAXS instrumentation will help to make this powerful structure analysis technique more widely accessible and affordable for multi-user laboratories.
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Affiliation(s)
- Joerg Bolze
- Malvern Panalytical, Lelyweg 1, Almelo 7602 EA, The Netherlands
| | - Vladimir Kogan
- Dannalab B.V., Wethouder Beversstraat 185, Enschede 7543 BK, The Netherlands
| | - Detlef Beckers
- Malvern Panalytical, Lelyweg 1, Almelo 7602 EA, The Netherlands
| | - Martijn Fransen
- Malvern Panalytical, Lelyweg 1, Almelo 7602 EA, The Netherlands
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Iyer A, Roeters SJ, Kogan V, Woutersen S, Claessens MMAE, Subramaniam V. C-Terminal Truncated α-Synuclein Fibrils Contain Strongly Twisted β-Sheets. J Am Chem Soc 2017; 139:15392-15400. [PMID: 28968082 PMCID: PMC5668890 DOI: 10.1021/jacs.7b07403] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
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C-terminal truncations
of monomeric wild-type alpha-synuclein (henceforth
WT-αS) have been shown to enhance the formation of amyloid aggregates
both in vivo and in vitro and have
been associated with accelerated progression of Parkinson’s
disease (PD). The correlation with PD may not solely be a result of
faster aggregation, but also of which fibril polymorphs are preferentially
formed when the C-terminal residues are deleted. Considering that
different polymorphs are known to result in distinct pathologies,
it is important to understand how these truncations affect the organization
of αS into fibrils. Here we present high-resolution microscopy
and advanced vibrational spectroscopy studies that indicate that the
C-terminal truncation variant of αS, lacking residues 109–140
(henceforth referred to as 1–108-αS), forms amyloid fibrils
with a distinct structure and morphology. The 1–108-αS
fibrils have a unique negative circular dichroism band at ∼230
nm, a feature that differs from the canonical ∼218 nm band
usually observed for amyloid fibrils. We show evidence that 1–108-αS
fibrils consist of strongly twisted β-sheets with an increased
inter-β-sheet distance and a higher solvent exposure than WT-αS
fibrils, which is also indicated by the pronounced differences in
the 1D-IR (FTIR), 2D-IR, and vibrational circular dichroism spectra.
As a result of their distinct β-sheet structure, 1–108-αS
fibrils resist incorporation of WT-αS monomers.
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Affiliation(s)
- Aditya Iyer
- Nanoscale Biophysics Group, AMOLF , Science Park 104, Amsterdam 1098 XG, The Netherlands.,Nanobiophysics Group, MESA+ Institute for Nanotechnology, University of Twente , Drienerlolaan 5, Enschede 7522 NB, The Netherlands
| | - Steven J Roeters
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, Amsterdam 1098 XH, The Netherlands
| | - Vladimir Kogan
- Dannalab BV , Wethouder Beversstraat 185, Enschede 7543 BK, The Netherlands
| | - Sander Woutersen
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, Amsterdam 1098 XH, The Netherlands
| | - Mireille M A E Claessens
- Nanobiophysics Group, MESA+ Institute for Nanotechnology, University of Twente , Drienerlolaan 5, Enschede 7522 NB, The Netherlands
| | - Vinod Subramaniam
- Nanoscale Biophysics Group, AMOLF , Science Park 104, Amsterdam 1098 XG, The Netherlands.,Nanobiophysics Group, MESA+ Institute for Nanotechnology, University of Twente , Drienerlolaan 5, Enschede 7522 NB, The Netherlands.,Vrije Universiteit Amsterdam , De Boelelaan 1105, Amsterdam 1081 HV, The Netherlands
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Schmidt RJ, Kogan V, Shelton JF, Delwiche L, Hansen RL, Ozonoff S, Ma CC, McCanlies EC, Bennett DH, Hertz-Picciotto I, Tancredi DJ, Volk HE. Combined Prenatal Pesticide Exposure and Folic Acid Intake in Relation to Autism Spectrum Disorder. Environ Health Perspect 2017; 125:097007. [PMID: 28934093 PMCID: PMC5915192 DOI: 10.1289/ehp604] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 03/16/2017] [Accepted: 03/18/2017] [Indexed: 05/22/2023]
Abstract
BACKGROUND Maternal folic acid (FA) protects against developmental toxicity from certain environmental chemicals. OBJECTIVE We examined combined exposures to maternal FA and pesticides in relation to autism spectrum disorder (ASD). METHODS Participants were California children born from 2000-2007 who were enrolled in the Childhood Autism Risks from Genetics and the Environment (CHARGE) case-control study at age 2-5 y, were clinically confirmed to have ASD (n=296) or typical development (n=220), and had information on maternal supplemental FA and pesticide exposures. Maternal supplemental FA and household pesticide product use were retrospectively collected in telephone interviews from 2003-2011. High vs. low daily FA intake was dichotomized at 800μg (median). Mothers' addresses were linked to a statewide database of commercial applications to estimate agricultural pesticide exposure. RESULTS High FA intake (≥800μg) during the first pregnancy month and no known pesticide exposure was the reference group for all analyses. Compared with this group, ASD was increased in association with <800μg FA and any indoor pesticide exposure {adjusted odds ratio [OR]=2.5 [95% confidence interval (CI): 1.3, 4.7]} compared with low FA [OR=1.2 (95% CI: 0.7, 2.2)] or indoor pesticides [OR=1.7 (95% CI: 1.1, 2.8)] alone. ORs for the combination of low FA and regular pregnancy exposure (≥6 mo) to pet pesticides or to outdoor sprays and foggers were 3.9 (95% CI: 1.4, 11.5) and 4.1 (95% CI: 1.7, 10.1), respectively. ORs for low maternal FA and agricultural pesticide exposure 3 mo before or after conception were 2.2 (95% CI: 0.7, 6.5) for chlorpyrifos, 2.3 (95% CI: 0.98, 5.3) for organophosphates, 2.1 (95% CI: 0.9, 4.8) for pyrethroids, and 1.5 (95% CI: 0.5, 4.8) for carbamates. Except for carbamates, these ORs were approximately two times greater than those for either exposure alone or for the expected ORs for combined exposures under multiplicative or additive models. CONCLUSIONS In this study population, associations between pesticide exposures and ASD were attenuated among those with high versus low FA intake during the first month of pregnancy. Confirmatory and mechanistic studies are needed. https://doi.org/10.1289/EHP604.
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Affiliation(s)
- Rebecca J Schmidt
- Department of Public Health Sciences, University of California Davis School of Medicine , Davis, California, USA
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis , Sacramento, California, USA
| | - Vladimir Kogan
- Division of Biostatistics, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Janie F Shelton
- Department of Public Health Sciences, University of California Davis School of Medicine , Davis, California, USA
| | - Lora Delwiche
- Department of Public Health Sciences, University of California Davis School of Medicine , Davis, California, USA
| | - Robin L Hansen
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis , Sacramento, California, USA
- Department of Pediatrics, University of California Davis School of Medicine, Davis, California, USA
| | - Sally Ozonoff
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis , Sacramento, California, USA
- Department of Psychiatry and Behavioral Sciences, University of California Davis School of Medicine, Davis, California, USA
| | - Claudia C Ma
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia, USA
| | - Erin C McCanlies
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia, USA
| | - Deborah H Bennett
- Department of Public Health Sciences, University of California Davis School of Medicine , Davis, California, USA
| | - Irva Hertz-Picciotto
- Department of Public Health Sciences, University of California Davis School of Medicine , Davis, California, USA
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis , Sacramento, California, USA
| | - Daniel J Tancredi
- Department of Pediatrics, University of California Davis School of Medicine, Davis, California, USA
| | - Heather E Volk
- Division of Biostatistics, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
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Affiliation(s)
- Vladimir Kogan
- Battelle Memorial Institute, 505 King Avenue, Columbus, Ohio 43201-2693
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8
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Roeters SJ, Iyer A, Pletikapić G, Kogan V, Subramaniam V, Woutersen S. Evidence for Intramolecular Antiparallel Beta-Sheet Structure in Alpha-Synuclein Fibrils from a Combination of Two-Dimensional Infrared Spectroscopy and Atomic Force Microscopy. Sci Rep 2017; 7:41051. [PMID: 28112214 PMCID: PMC5253669 DOI: 10.1038/srep41051] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 12/12/2016] [Indexed: 12/13/2022] Open
Abstract
The aggregation of the intrinsically disordered protein alpha-synuclein (αS) into amyloid fibrils is thought to play a central role in the pathology of Parkinson’s disease. Using a combination of techniques (AFM, UV-CD, XRD, and amide-I 1D- and 2D-IR spectroscopy) we show that the structure of αS fibrils varies as a function of ionic strength: fibrils aggregated in low ionic-strength buffers ([NaCl] ≤ 25 mM) have a significantly different structure than fibrils grown in higher ionic-strength buffers. The observations for fibrils aggregated in low-salt buffers are consistent with an extended conformation of αS molecules, forming hydrogen-bonded intermolecular β-sheets that are loosely packed in a parallel fashion. For fibrils aggregated in high-salt buffers (including those prepared in buffers with a physiological salt concentration) the measurements are consistent with αS molecules in a more tightly-packed, antiparallel intramolecular conformation, and suggest a structure characterized by two twisting stacks of approximately five hydrogen-bonded intermolecular β-sheets each. We find evidence that the high-frequency peak in the amide-I spectrum of αS fibrils involves a normal mode that differs fundamentally from the canonical high-frequency antiparallel β-sheet mode. The high sensitivity of the fibril structure to the ionic strength might form the basis of differences in αS-related pathologies.
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Affiliation(s)
- Steven J Roeters
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Aditya Iyer
- Nanoscale Biophysics Group, FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Galja Pletikapić
- Nanoscale Biophysics Group, FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Vladimir Kogan
- Dannalab BV, Wethouder Beversstraat 185, 7543 BK Enschede, The Netherlands
| | - Vinod Subramaniam
- Nanoscale Biophysics Group, FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.,Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
| | - Sander Woutersen
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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10
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Abstract
The reaction of a quaternary ammonium salt of the tin chloride-substituted polyoxometalate, [PSn(Cl)W11O39]4-, with a variety of n-nucleophiles including primary, secondary, and tertiary amines and a tertiary phosphine, yielded tin-centered Lewis acid-base adducts, [PSn(Cl)W11O39]4--n-nucleophile; with more nucleophilic secondary amines such as diisopropylamine, apparently some [PSnN[CH(CH3)2]2W11O39]4- was formed as a minor product. The compounds were identified by 1H, 119Sn, 15N, 31P, and 183W NMR, ESI-MS, and elemental analyses. The key connectivity of the Sn-Cl center with the amine was clarified by the observation of 3J Sn-H couplings (Sn from the polyoxometalate cluster and H from the amine moiety) in a 2D 119Sn-1H heteronuclear multiple-bond correlation NMR experiment. This new, rather simple synthetic method was also utilized for preparing amino acid-polyoxometalate hybrid compounds.
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Affiliation(s)
- Itsik Bar-Nahum
- Department of Organic Chemistry and Chemical Research Support Unit, Weizmann Institute of Science, Rehovot 76100, Israel
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Lipshutz BH, Frieman BA, Butler T, Kogan V. Heterogeneous Catalysis with Nickel-on-Graphite (Ni/Cg): Reduction of Aryl Tosylates and Mesylates. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200502887] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lipshutz BH, Frieman BA, Butler T, Kogan V. Heterogeneous Catalysis with Nickel-on-Graphite (Ni/Cg): Reduction of Aryl Tosylates and Mesylates. Angew Chem Int Ed Engl 2006; 45:800-3. [PMID: 16370015 DOI: 10.1002/anie.200502887] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Bruce H Lipshutz
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA.
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Kogan V, Quintal MM, Neumann R. Regioselective Alkene Carbon−Carbon Bond Cleavage to Aldehydes and Chemoselective Alcohol Oxidation of Allylic Alcohols with Hydrogen Peroxide Catalyzed by [cis-Ru(II)(dmp)2(H2O)2]2+ (dmp = 2,9-dimethylphenanthroline). Org Lett 2005; 7:5039-42. [PMID: 16235952 DOI: 10.1021/ol052025e] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] [cis-Ru(II)(dmp)2(H2O)2]2+ (dmp = 2,9-dimethylphenanthroline) was found to be a selective oxidation catalyst using hydrogen peroxide as oxidant. Thus, primary alkenes were very efficiently oxidized via direct carbon-carbon bond cleavage to the corresponding aldehydes as an alternative to ozonolysis. Secondary alkenes were much less reactive, leading to regioselective oxidation of substrates such as 4-vinylcyclohexene and 7-methyl-1,6-octadiene at the terminal position. Primary allylic alcohols were chemoselectively oxidized to the corresponding allylic aldehydes, e.g., geraniol to citral.
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Affiliation(s)
- Vladimir Kogan
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel
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Kogan V. New model-free method of aberrations correction for X-ray powder diffractometry. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305079857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kogan V, Aizenshtat Z, Popovitz-Biro R, Neumann R. Carbon-carbon and carbon-nitrogen coupling reactions catalyzed by palladium nanoparticles derived from a palladium substituted Keggin-type polyoxometalate. Org Lett 2002; 4:3529-32. [PMID: 12323061 DOI: 10.1021/ol026689p] [Citation(s) in RCA: 172] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium 15-20 nm particles stabilized by a Keggin-type polyoxometalate were prepared by reduction of K(5)PPdW(11)O(39) with H(2). The nanoparticles were shown to be effective catalysts for Suzuki-, Heck-, and Stille-type carbon-carbon coupling and carbon-nitrogen coupling reactions of bromoarenes in aqueous media. Chloroarenes were also reactive in reaction media without solvent. [reaction: see text]
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Affiliation(s)
- Vladimir Kogan
- Department of Organic Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel 91904
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Kogan V, Aizenshtat Z, Neumann R. Preferential catalytic hydrogenation of aromatic compounds versus ketones with a palladium substituted polyoxometalate as pre-catalyst. NEW J CHEM 2002. [DOI: 10.1039/b110937p] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kogan V. The world celebrity, unknown in his homeland. Agapit 2001:69. [PMID: 11620516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Blum J, Kogan V, Glatt H. Further studies on polycyclic arene sulfides. Preparation and mutagenic activity of 9, 10, 10a, 11a-tetrahydrotriphenyleno[1,2- b]-thiirene, 1a,2,3,10b-tetrahydro-5 H-thiereno[3,4]benzo[1,2- b]fluorene and 1a,2,3,11b-tetrahydroacenaphtho[1′,2′:6,7]naphth[1,2- b]thiirene. J Heterocycl Chem 2000. [DOI: 10.1002/jhet.5570370514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kogan V. Two letters of V.P. Filatov to V.F. Voino-Yasenetsky. Agapit 1996:65-9. [PMID: 11620503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
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Shalom Y, Kogan V, Badriah Y, Harvey RG. Polycyclic arene sulfides. Preparation of 1a,2,3,11b-tetrahydrobenz-[5,6]anthra[1,2-b]thiirene, 6b,7a,8,9-tetrahydrobenzo[10,11]-chryseno[1,2-b]thiirene, and 7,8,8a,9a-tetrahydrobenzo-[10,11]chryseno[3,4-b]thiirene. J Heterocycl Chem 1996. [DOI: 10.1002/jhet.5570330110] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Finnemore DK, Shelton RN, Clem JR, McCallum RW, Ku HC, McCarley RE, Chen SC, Klavins P, Kogan V. Magnetization of superconducting lanthanum copper oxides. Phys Rev B Condens Matter 1987; 35:5319-5322. [PMID: 9940725 DOI: 10.1103/physrevb.35.5319] [Citation(s) in RCA: 68] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Forsberg CW, Mathieu P, Distexhe E, Jordan H, Schumacher PM, Kogan V, Dayal R, Pietrzak RF, Clinton JH, Uda T, Iba H, Hanawa K, Dayal R, Pietrzak RF, Clinton JH, Neretnieks I, Matsumoto G, Murata N, Suzuki S, Matsumoto M, Ohkubo K, Ikeda Y, Lo JG, Chen DY, Wang JZ, Teuchert E, Haas KA. Authors. NUCL TECHNOL 1986. [DOI: 10.13182/nt86-a33734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Jordan H, Schumacher PM, Kogan V. Modeling of Multiple-Component Aerosols – Sensitivities to Assumptions. NUCL TECHNOL 1986. [DOI: 10.13182/nt86-a33737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hans Jordan
- Battelle Columbus Laboratories 505 King Avenue, Columbus, Ohio 43201
| | | | - Vladimir Kogan
- Battelle Columbus Laboratories 505 King Avenue, Columbus, Ohio 43201
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