M. S. Burns

Colorado College

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S. Perlmutter

Lawrence Berkeley National Laboratory

R. Amanullah

Stockholm University

C. Lidman

Australian National University

D. A. Howell

Las Cumbres Observatory Global Telescope Network

G. Aldering

Lawrence Berkeley National Laboratory

A. Goobar

Stockholm University

I. Hook

Lancaster University

G. Goldhaber

Stanford Synchrotron Radiation Lightsource

S. Nobili

Stockholm University

P. Nugent

Lawrence Berkeley National Laboratory

Cooperative Institutions

Lawrence Berkeley National Laboratory

University of California, Berkeley

Centre National de la Recherche Scientifique

Université Paris Cité

Institut National de Physique Nucléaire et de Physique des Particules

Sorbonne Université

Laboratoire de Physique Nucléaire et de Hautes Énergies

Australian National University

University of Oxford

California Institute of Technology

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Acanthamoeba Sclerokeratitis

Archives of Ophthalmology (1986)

Mark J. Mannis Ronald Tamaru Alan M. Roth M. S. Burns Charles E. Thirkill

Acanthamoeba infection of the cornea is an entity now recognized with increasing frequency. We saw two cases of Acanthamoeba sclerokeratitis in contact lens wearers in whom scleritis (anterior and posterior) played a central role in the clinical course of the disease. Scleritis is probably a more common component of Acanthamoeba infection than has generally been acknowledged. Posterior scleritis has not, to our knowledge, been reported previously in this disorder. The clinical diagnosis of Acanthamoeba infection has often been missed due to lack of a definition of the historical and clinical criteria by which this disease is characterized. We reviewed the 26 previously reported cases and suggest a set of criteria that can be used to establish an early diagnosis. Historical criteria include minor corneal trauma, exposure to soil or standing water, or contact lens wear. Clinical characteristics include severe pain, infiltrative (often ring-shaped) stromal keratitis, variable anterior uveitis, epithelial erosion, scleritis, standard bacterial culture negativity, chronicity, and lack of response to antimicrobial agents.

Acanthamoeba keratitis

10.1001/archopht.1986.01050210067027

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Citations (89)

The retinal pigment epithelium induces fenestration of endothelial cellsin vivo

Current Eye Research (1992)

M. S. Burns Marcia J. Hartz

Rodent photoreceptor dystrophies are characterized by late stage ingrowth of retinal blood vessels into the retinal pigment epithelium (RPE) where they proliferate. Some of these vessels develop the fenestrated phenotype of the choriocapillaris (CC). To determine if development of fenestrae in these endothelial cells is a function of the duration of time the endothelial cell had been encapsulated by the RPE, we did an ultrastructural morphometric study of these vessels in urethane induced photoreceptor degeneration in Long-Evans rats. Retinas of animals aged 20, 24, 40 and 56 weeks were studied.The fraction of vessel profiles within the RPE that had fenestrated endothelial cells increased from 10% to 90% between 20 to 56 weeks. The average number of fenestrae per vessel increased approximately 25 fold between 20 and 24 weeks but stabilized after that, despite a decrease in the number of vessels present at 56 weeks. A large number of degenerated retinal vessel profiles were seen in the RPE at 40 weeks. These facts support the idea that the presence of the RPE induces endothelial cell fenestrae, and also show that a complex process of remodelling including proliferation and degeneration is occurring in these vessels. Analogies between the basic cell biology of neovascularization occuring in these rodent models and that of proliferative diabetic retinopathy and age-related macular degeneration are discussed.

10.3109/02713689209033484

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Of Tender Years

Books Ireland (1992)

Treasa Brogan Madeleine Clarke Nóirín Hayes Michael Quinn Terri Quinn

Tender offer

10.2307/20626530

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The Host Galaxies of Type Ia Supernovae at High Redshift

American Astronomical Society Meeting Abstracts (2002)

R. Quimby G. Aldering P. Nugent R. Amanullah P. Astier

Source

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Remodelling of the retinal pigment epithelium in response to intraepithelial capillaries: evidence that capillaries influence the polarity of epithelium

Cell and Tissue Research (1986)

Gary E. Korte Roy W. Bellhorn M. S. Burns

10.1007/bf00218094

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Citations (19)

RestframeI-band Hubble diagram for type Ia supernovae up to redshiftz$\mathsf{\sim}$ 0.5

Astronomy and Astrophysics (2005)

S. Nobili R. Amanullah G. Garavini A. Goobar C. Lidman

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the subset at 0.01< z<0.1. Adding two SNe at z~0.5 yields results consistent with a flat Lambda-dominated``concordance universe'' ($\Omega_M,\Omega_\Lambda$)=(0.25,0.75). For one of these, SN 2000fr, new near infrared data are presented. The high redshift supernova NIR data are also used to test for systematic effects in the use of SNe Ia as distance estimators. A flat, Lambda=0, universe where the faintness of supernovae at z~0.5 is due to grey dust homogeneously distributed in the intergalactic medium is disfavoured based on the high-z Hubble diagram using this small data-set. However, the uncertainties are large and no firm conclusion may be drawn. We explore the possibility of setting limits on intergalactic dust based on B-I and B-V colour measurements, and conclude that about 20 well measured SNe are needed to give statistically significant results. We also show that the high redshift restframe I-band data points are better fit by light curve templates that show a prominent second peak, suggesting that they are not intrinsically underluminous.

Cosmic distance ladder

Intergalactic dust

10.1051/0004-6361:20042463

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Citations (49)

Localization of calcium and barium in toad retina by secondary ion mass spectrometry

Brain Research (1981)

M. S. Burns David M. File Kenneth T. Brown Dale G. Flaming

Barium

10.1016/0006-8993(81)90221-3

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Quantitative comparison between type Ia supernova spectra at low and high redshifts: a case study

Astronomy and Astrophysics (2007)

G. Garavini G. Folatelli S. Nobili G. Aldering R. Amanullah

We develop a method to measure the strength of the absorption features in type Ia supernova (SN Ia) spectra and use it to make a quantitative comparisons between the spectra of type Ia supernovae at low and high redshifts. In this case study, we apply the method to 12 high-redshift (0.212 ≤ z ≤ 0.912) SNe Ia observed by the Supernova Cosmology Project. Through measurements of the strengths of these features and of the blueshift of the absorption minimum in Ca ii H&K, we show that the spectra of the high-redshift SNe Ia are quantitatively similar to spectra of nearby SNe Ia (z < 0.15). One supernova in our high redshift sample, SN 2002fd at z = 0.279, is found to have spectral characteristics that are associated with peculiar SN 1991T/SN 1999aa-like supernovae.

Blueshift

10.1051/0004-6361:20065400

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Citations (55)

Quantitative microlocalization of diffusible ions in normal and galactose cataractous rat lens by secondary ion mass spectrometry

Journal of Microscopy (1986)

M. S. Burns David M. File

SUMMARY Secondary ion mass spectrometry (SIMS) is a surface analytical technique with high sensitivity for elemental detection and microlocalization capabilities within the micrometre range. Quantitative analysis of epoxy resins and gelatin have been reported (Burns‐Bellhorn & File, 1979).

Quantitative Analysis

10.1111/j.1365-2818.1986.tb02797.x

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Citations (22)

Role of SIMS microscopy in solving biological problems

Biology of the Cell (1992)

M. S. Burns

Boulevard

10.1016/0248-4900(92)90003-j

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Citations (2)