A5004268854- Lipid Membrane Structure and Behavior
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Surfactants and Colloidal Systems
- Spectroscopy and Quantum Chemical Studies
- Astronomical Observations and Instrumentation
- Photosynthetic Processes and Mechanisms
- Lipid metabolism and biosynthesis
- Galaxies: Formation, Evolution, Phenomena
- Sphingolipid Metabolism and Signaling
- Proteins in Food Systems
- Adaptive optics and wavefront sensing
- Food Chemistry and Fat Analysis
- Crystallization and Solubility Studies
- Scientific Research and Discoveries
- Antioxidant Activity and Oxidative Stress
- X-ray Diffraction in Crystallography
- Protein Structure and Dynamics
- Astrophysics and Star Formation Studies
- Photoreceptor and optogenetics research
- Protein Interaction Studies and Fluorescence Analysis
- Erythrocyte Function and Pathophysiology
- Radio Astronomy Observations and Technology
- Metabolomics and Mass Spectrometry Studies
- Free Radicals and Antioxidants
Durham University
2014-2022
King's College London
2009-2021
International Centre for Radio Astronomy Research
2010-2020
The University of Western Australia
1995-2020
King's College School
2007-2017
Cisco Systems (Norway)
2015
European Southern Observatory
1996-2010
Marie Curie
2010
Sorbonne Université
2010
Institut Laue-Langevin
2009
We report on our search for microlensing towards the Large Magellanic Cloud (LMC). Analysis of 5.7 years photometry 11.9 million stars in LMC reveals 13 - 17 events. This is significantly more than $\sim$ 2 to 4 events expected from lensing by known stellar populations. The timescales ($\that$) range 34 230 days. estimate optical depth with $2 < \that 400$ days be 1.2 ^{+0.4}_ {-0.3} \ten{-7}$, an additional 20% 30% systematic error. spatial distribution mildly inconsistent LMC/LMC disk...
view Abstract Citations (514) References (74) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Heating of Galactic Disks by Mergers Quinn, P. J. ; Hernquist, Lars Fullagar, D. between disk and satellite galaxies are studied using numerical simulation. These events can significantly perturb the structure a if center mass kinetic energy is similar to vertical stars. A single merger sufficient destroy thin even only few percent that disk. Repeated bombardments...
The MACHO Project is a search for dark matter in the form of massive compact halo objects (MACHOs). Photometric monitoring millions stars Large Magellanic Cloud (LMC), Small (SMC), and Galactic bulge used to gravitational microlensing events caused by these otherwise invisible objects. Analysis first 2.1 yr photometry 8.5 million LMC reveals eight candidate events. This substantially more than number expected (~1.1) from lensing known stellar populations. timescales (t) range 34 145 days. We...
view Abstract Citations (546) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dark Halos Formed via Dissipationless Collapse. I. Shapes and Alignment of Angular Momentum Warren, Michael S. ; Quinn, Peter J. Salmon, John K. Zurek, Wojciech H. We use N-body simulations on highly parallel supercomputers to study the structure Galactic dark matter halos. The systems form by gravitational collapse from scale-free more general Gaussian initial...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMembrane fusion and inverted phasesHarma Ellens, David P. Siegel, Dennis Alford, Philip L. Yeagle, Lawrence Boni, Leonard J. Lis, Peter Quinn, Joe BentzCite this: Biochemistry 1989, 28, 9, 3692–3703Publication Date (Print):May 2, 1989Publication History Published online1 May 2002Published inissue 2 1989https://pubs.acs.org/doi/10.1021/bi00435a011https://doi.org/10.1021/bi00435a011research-articleACS PublicationsRequest reuse permissionsArticle...
view Abstract Citations (381) References (44) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the formation and dynamics of shells around elliptical galaxies. Quinn, P. J. Attention has recently been drawn to existence sharply defined, shell-like, optical features in outer regions many Simple N-body models have constructed which show these be consistent with structures formed by collision an galaxy a disk galaxy. The arise from phase wrapping dynamically...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysiological levels of diacylglycerols in phospholipid membranes induce membrane fusion and stabilize inverted phasesDavid P. Siegel, James Banschbach, Dennis Alford, Harma Ellens, Leonard J. Lis, Peter Quinn, Philip L. Yeagle, Joe BentzCite this: Biochemistry 1989, 28, 9, 3703–3709Publication Date (Print):May 2, 1989Publication History Published online1 May 2002Published inissue 2...
1. The interactions between cytochrome c (native and [14C]carboxymethylated) monolayers of phosphatidylcholine, phosphatidic acid cardiolipin at the air/water interface was investigated by measurements surface radioactivity, pressure potential. 2. On a subphase 10mm-or m-sodium chloride, penetration into egg phosphatidylcholine monolayers, as measured an increase pressure, number molecules penetrating, judged were inversely proportional to initial monolayer became zero 20dynes/cm. constant...
view Abstract Citations (273) References (55) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Sinking Satellites of Spiral Systems Quinn, P. J. ; Goodman, Jeremy The interaction a spiral galaxy with its system satellites leads to the orbital decay on time scales comparable their periods. Over Hubble time, disk and distribution can be significantly altered by action dynamical friction which exchange mass energy between disk. authors have used restricted N-body...
We present the first detection of parallax effects in a gravitational microlensing event. Parallax event observed only from Earth appears as distortion (otherwise symmetrical) light curve arising motion around Sun. This can be detected if duration is not much less than year and projected velocity lens larger orbital about The presented here has (or Einstein diameter crossing time) = 220 days clearly shows resulting Earth's motion. find that 75 ± 5 km s-1 at an angle 28° 4° direction...
view Abstract Citations (216) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Formation of Shell Galaxies. I. Spherical Potentials Hernquist, Lars ; Quinn, P. J. The formation shells through interactions low-mass systems with spherical galaxies is investigated using the restricted three-body method. It shown that such encounters lead to development sharp-edged features under a much wider set conditions than considered by Quinn. In particular...
The effect of hearing isolated bean chloroplasts on the structure their thylakoid membranes has been examined by freeze‐fracture electron microscopy. A normal morphology in which stacked grana can be observed is preserved up to 35°C. Incubation at 35–45°C causes complete destacking but no alteration distribution membrane‐associated particles between exoplasmic and protoplasmic fracture faces. Heating above 45°C phase‐separation non‐bilayer lipids into aggregates cylindrical inverted...