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Träfflista för sökning "WFRF:(Adiels L.) "

Sökning: WFRF:(Adiels L.)

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1.
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3.
  • Volpe, Giovanni, 1979, et al. (författare)
  • Roadmap for optical tweezers
  • 2023
  • Ingår i: Journal of Physics-Photonics. - : IOP Publishing. - 2515-7647. ; 5:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Optical tweezers are tools made of light that enable contactless pushing, trapping, and manipulation of objects, ranging from atoms to space light sails. Since the pioneering work by Arthur Ashkin in the 1970s, optical tweezers have evolved into sophisticated instruments and have been employed in a broad range of applications in the life sciences, physics, and engineering. These include accurate force and torque measurement at the femtonewton level, microrheology of complex fluids, single micro- and nano-particle spectroscopy, single-cell analysis, and statistical-physics experiments. This roadmap provides insights into current investigations involving optical forces and optical tweezers from their theoretical foundations to designs and setups. It also offers perspectives for applications to a wide range of research fields, from biophysics to space exploration.
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4.
  • Adiels, Lars, 1952-, et al. (författare)
  • Test of CP violation with K0 and K‾0 at LEAR
  • 1985
  • Ingår i: Physics with antiprotons at LEAR in the ACOL era. - Gif sur Yvette : Editions Frontières. - 2863320351 ; , s. 467-482
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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6.
  • Adiels, L., et al. (författare)
  • Experimental determination of the branching ratios {Mathematical expression}, and 2γ at rest
  • 1987
  • Ingår i: Zeitschrift für Physik C Particles and Fields. - : Springer. - 0170-9739 .- 1431-5858. ; 35:1, s. 15-19
  • Tidskriftsartikel (refereegranskat)abstract
    • The branching ratios of {Mathematical expression} annihilations into the neutral final states 2π 0, π 0γ, and 2γ are measured by stopping antiprotons in liquid hydrogen. They are {Mathematical expression}, {Mathematical expression}, and B γγ<1.7×10 -6 (95% c.l.).
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7.
  • Adiels, L., et al. (författare)
  • Experimental determination of the branching ratios proton-antiproton -> 2pi0, pi0γ and γγ at rest
  • 1987
  • Ingår i: Zeitschrift für Physik C Particles and Fields. - 0170-9739. ; 35:1, s. 15-19
  • Tidskriftsartikel (refereegranskat)abstract
    • The branching ratios of Mathematical expression annihilations into the neutral final states 2Ï€0, Ï€0γ, and 2γ are measured by stopping antiprotons in liquid hydrogen. They are Mathematical expression, Mathematical expression, and Bγγ<1.7×10-6 (95% c.l.). © 1987 Springer-Verlag.
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8.
  • Adiels, L., et al. (författare)
  • Experimental study of the inclusive η-spectrum from p {Mathematical expression} annihilations at rest in liquid hydrogen
  • 1989
  • Ingår i: Zeitschrift für Physik C Particles and Fields. - : Springer. - 0170-9739 .- 1431-5858. ; 42:1, s. 49-58
  • Tidskriftsartikel (refereegranskat)abstract
    • The inclusive η-momentum spectrum from {Mathematical expression} annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for {Mathematical expression}, and ηη(8.1±3.1)×10 -5. An upper limit for {Mathematical expression} of 1.8×10 -4 at 95% CL was found. The ratio of the branching ratios is BR(ηρ{variant})/BR(ηω)=0.51 -0.06 +0.20. For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηπ 0)/BR(π 0π 0)=0.65±0.14, BR(ηη)/BR(π 0π 0), BR(ηη ′)/BR(π 0π 0) at 95% CL, and BR(ηη)/BR(ηπ 0). © 1989 Springer-Verlag.
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9.
  • Adiels, L., et al. (författare)
  • Investigations on baryonium and other rare pmacrp annihilation modes using high resolution pi0 spectrometers (PS 182)
  • 1985
  • Ingår i: Antiproton 1984. Proceedings of the VII European Symposium on Antiproton Interactions. - : Institution of Electrical Engineers (IEE). ; , s. 297-304
  • Konferensbidrag (refereegranskat)abstract
    • In the search for heavy, narrow exotic states such as baryonium or glueballs, carried out so far, various methods of high- and low-energy production, low-energy formation, and e+e- reactions were used. In particular, a search for baryonium states below threshold (mxlsimmppmacr) has shown some evidence [Richter et al., 1983, Brando et al., 1984] for a few states. However, the results of these measurements suffer from poor statistics. Among the possible methods which can be applied in the baryonium bound state research at LEAR, the authors consider the study of the reaction ppmacrrarrX+pi0 as the most promising. They have performed an experiment to study this reaction by means of an experimental set-up especially tailored for measuring monoenergetic pi0,s, allowing for both angular distribution measurements and high-resolution spectroscopy. They report on the preliminary results from our actual measurements of the inclusive pi0 and eta spectra following the antiproton annihilation at rest.
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12.
  • Adiels, L., et al. (författare)
  • Pi0 and eta spectra from proton-antiproton annihilations at rest
  • 1984
  • Ingår i: Zeitschrift für Physik. C, Particles and fields. - 0170-9739. ; 21:4, s. 315-319
  • Tidskriftsartikel (refereegranskat)abstract
    • The low-energy part of the Ï€0 spectrum associated with Mathematical expression annihilation at rest was measured in order to search for bound baryonium-like states. The upper limit for reaching such states via the emission of monochromatic Ï€0’s was found to be 8% per annihilation in the mass region of 1650 MeV. The low-energy part of the η spectrum from Mathematical expression annihilations at rest was also observed.
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13.
  • Adiels, L., et al. (författare)
  • Pi0 And Eta Spectroscopy At Lear
  • 1986
  • Ingår i: Tignes 1985, Proceedings, Physics With Antiprotons At Lear In The Acol Era. ; , s. 359-359
  • Konferensbidrag (refereegranskat)
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14.
  • Adiels, L., et al. (författare)
  • Search for narrow exotic states in annihilations on 4He
  • 1984
  • Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 138:1-3, s. 235-240
  • Tidskriftsartikel (refereegranskat)abstract
    • After having found evidence for narrow exotic states in p annihilation, the production of such states on a nuclear target was studied with similar techniques. The γ spectrum associated with annihilation on 4He at rest was measured. The spectrum shows two peaks, at energies of 161.9 and 203.0 MeV, corresponding to intermediate narrow states of masses which seem to be related to states found in p annihilations. The confidence is better than 4 σ.
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15.
  • Adiels, L., et al. (författare)
  • Search for narrow signals in the [gamma]-spectrum from [Proton-antiproton] annihilation at rest
  • 1986
  • Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 182:3-4, s. 405-408
  • Tidskriftsartikel (refereegranskat)abstract
    • The [gamma]-spectrum originating from pp[combining macron] annihilations at rest in liquid hydrogen was measured with two BGO spectrometers. A total of 24 ï¿œ 106[gamma]’s were accumulated. No narrow peaks indicating exotic states such as baryonium were observed. The upper limit for the branching ratio with 1040 [less-than-or-equals, slant] mx [less-than-or-equals, slant] 1770 MeV/c2 and with [lambda]x [less-than-or-equals, slant] 25 MeV/c2 is less than 10-3 with more than 99.96% confidence.
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16.
  • Adiels, L., et al. (författare)
  • Search for narrow signals in the γ-spectrum from pp̄ annihilation at rest
  • 1986
  • Ingår i: Physics Letters B. - : Elsevier. - 0370-2693 .- 1873-2445. ; 182:3-4, s. 405-408
  • Tidskriftsartikel (refereegranskat)abstract
    • The γ-spectrum originating from pp̄ annihilations at rest in liquid hydrogen was measured with two BGO spectrometers. A total of 24 × 10 6 γ's were accumulated. No narrow peaks indicating exotic states such as baryonium were observed. The upper limit for the branching ratio p p ̄ → γ + X with 1040 ≤ m x ≤ 1770 MeV/c 2 and with λ x ≤ 25 MeV/c 2 is less than 10 -3 with more than 99.96% confidence. © 1986.
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17.
  • Adiels, L, et al. (författare)
  • Some results of experiment PS182 at LEAR
  • 1986
  • Ingår i: Antiproton 86. - Singspore : World Scientific Publishing. - 9971503131 ; , s. 199-204, s. 199-204
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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18.
  • Adiels, L, et al. (författare)
  • π0 and η spectroscopy at LEAR
  • 1985
  • Ingår i: Physics with antiprotons at LEAR in the ACOL era. - Gif sur Yvette : Editions Frontières. - 2863320351 ; , s. 359-360
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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20.
  • Bee, C. P., et al. (författare)
  • The CP-LEAR data acquisition system
  • 1986
  • Ingår i: Proceedings. - Geneva : CERN. ; , s. 179-184
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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21.
  • Blüm, P., et al. (författare)
  • A modular NaI(Tl) detector for 20-1000 MeV photons
  • 1983
  • Ingår i: Nuclear Instruments and Methods in Physics Research. - : Elsevier BV. - 0167-5087. ; 213:2-3, s. 251-259
  • Tidskriftsartikel (refereegranskat)abstract
    • A detector consisting of 54 NaI (Tl) modules is described. The detector has been optimized for the detection of 20-1000 MeV photons. An energy resolution (fwhm) of 5.5% at 130 MeV could be attained, and the stability has been better than 1% over several months.
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23.
  • Hodson, L., et al. (författare)
  • Menopausal Status and Abdominal Obesity Are Significant Determinants of Hepatic Lipid Metabolism in Women
  • 2015
  • Ingår i: Journal of the American Heart Association. - : Ovid Technologies (Wolters Kluwer Health). - 2047-9980. ; 4:10
  • Tidskriftsartikel (refereegranskat)abstract
    • Background-Android fat distribution (abdominal obesity) is associated with insulin resistance, hepatic steatosis, and greater secretion of large very low-density lipoprotein (VLDL) particles in men. Since abdominal obesity is becoming increasingly prevalent in women, we aimed to investigate the relationship between android fat and hepatic lipid metabolism in pre-and postmenopausal women. Methods and Results-We used a combination of stable isotope tracer techniques to investigate intrahepatic fatty acid synthesis and partitioning in 29 lean and 29 abdominally obese women (android fat/total fat 0.065 [0.02 to 0.08] and 0.095 [0.08 to 0.11], respectively). Thirty women were premenopausal aged 35 to 45 and they were matched for abdominal obesity with 28 postmenopausal women aged 55 to 65. As anticipated, abdominal obese women were more insulin resistant with enhanced hepatic secretion of large (404 +/- 30 versus 268 +/- 26 mg/kg lean mass, P<0.001) but not small VLDL (160 +/- 11 versus 142 +/- 13). However, postmenopausal status had a pronounced effect on the characteristics of small VLDL particles, which were considerably triglyceride-enriched (production ratio of VLDL2-triglyceride: apolipoprotein B 30 +/- 5.3 versus 19 +/- 1.6, P<0.05). In contrast to postmenopausal women, there was a tight control of hepatic fatty acid metabolism and triglyceride production in premenopausal women, whereby oxidation (r(s)=-0.49, P=0.006), de novo lipogenesis (r(s)=0.55, P=0.003), and desaturation (r(s)=0.48, P=0.012) were closely correlated with abdominal obesity-driven large VLDL-triglyceride secretion rate. Conclusions-In women, abdominal obesity is a major driver of hepatic large VLDL particle secretion, whereas postmenopausal status was characterized by increased small VLDL particle size. These data provide a mechanistic basis for the hyperlipidemia observed in postmenopausal obesity.
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24.
  • Palmer, C. N. A., et al. (författare)
  • Paradoxical Lower Serum Triglyceride Levels and Higher Type 2 Diabetes Mellitus Susceptibility in Obese Individuals with the PNPLA3 148M Variant
  • 2012
  • Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 7:6
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Obesity is highly associated with elevated serum triglycerides, hepatic steatosis and type 2 diabetes (T2D). The I148M (rs738409) genetic variant of patatin-like phospholipase domain-containing 3 gene (PNPLA3) is known to modulate hepatic triglyceride accumulation, leading to steatosis. No association between PNPLA3 I148M genotype and T2D in Europeans has been reported. Aim of this study is to examine the relationship between PNPLA3 I148M genotypes and serum triglycerides, insulin resistance and T2D susceptibility by testing a gene-environment interaction model with severe obesity. Methods and Findings: PNPLA3 I148M was genotyped in a large obese cohort, the SOS study (n = 3,473) and in the Go-DARTS (n = 15,448), a T2D case-control study. Metabolic parameters were examined across the PNPLA3 I148M genotypes in participants of the SOS study at baseline and at 2- and 10-year follow up after bariatric surgery or conventional therapy. The associations with metabolic parameters were validated in the Go-DARTS study. Serum triglycerides were found to be lower in the PNPLA3 148M carriers from the SOS study at baseline and from the Go-DARTS T2D cohort. An increased risk for T2D conferred by the 148M allele was found in the SOS study (O.R. 1.09, 95% C.I. 1.01-1.39, P = 0.040) and in severely obese individuals in the Go-DARTS study (O. R. 1.37, 95% C.I. 1.13-1.66, P = 0.001). The 148M allele was no longer associated with insulin resistance or T2D after bariatric surgery in the SOS study and no association with the 148M allele was observed in the less obese (BMI<35) individuals in the Go-DARTS study (P for interaction = 0.002). This provides evidence for the obesity interaction with 148M allele and T2D risk in a large-scale cross-sectional and a prospective interventional study. Conclusions: Severely obese individuals carrying the PNPLA3 148M allele have lower serum triglyceride levels, are more insulin resistant and more susceptible to T2D. This study supports the hypothesis that obesity-driven hepatic lipid accumulation may contribute to T2D susceptibility.
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25.
  • Richter, B., et al. (författare)
  • New results in the search for narrow states in the p system below threshold
  • 1983
  • Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 126:3-4, s. 284-288
  • Tidskriftsartikel (refereegranskat)abstract
    • The γ-ray spectrum after p annihilation at rest was measured in two independent high-statistics runs. Both spectra show narrow peaks, corresponding to masses of 1210, 1638, 1694 and 1771 MeV.
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