We created an exposure database of respirable crystalline silica levels in the construction industry from the literature. We extracted silica and dust exposure levels in publications reporting silica exposure levels or quantitative evaluations of control effectiveness published in or after 1990. The database contains 6118 records (2858 of respirable crystalline silica) extracted from 115 source...

We demonstrate various efficient broad-band light sources at ~1μm wavelength with a 3dB bandwidth of up to 65nm at 108mW output power, based on rare-eartb doped silica fibers and a simple adjustable spectral filter.

background and objectives: the plants belonging to the genus heliotropium l. (boraginaceae) are the main sources of toxic pyrrolizidine alkaloids (pas). in the present study, we have investigated the pas of the aerial parts of heliotropium transoxanum bunge, a perennial species native to iran. methods: silica gel column chromatography and silica gel ptlc were applied for the isolation of pas pr...

An ongoing resurgence of occupational lung disease among coal miners in the United States has been linked to respirable crystalline silica (RCS). To better protect miners, a deeper understanding key exposure factors is needed. As part larger investigation RCS 15 mines, this paper describes analysis mass content two types samples: (1) mine dust (RCMD) collected standardized locations each mine; ...

Integrated photon sources play a key role in quantum information science, but source nonuniformity prevents all circuit elements from being connected coherently. The authors address this longstanding challenge via birefringence engineering and nonlinear interaction locking femtosecond-laser direct writing, to yield 128 uniform integrated single chip. These are tunable different pumping regimes,...

1 Final report for AOARD/ ITC-PAC Grant 114071 “Silica & Germanate Glass High Power Fiber Laser Sources” Prepared: January 2014 PI and Co-PI information: Principal Investigator: Prof Tanya Monro Co investigators: A/Prof Heike Ebendorff-Heidepriem, A/Prof David Lancaster, Dr David Ottaway Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, Australia Period of Investi...

Impaired fibrinolytic activity and persistent fibrin deposits in lung tissue have been associated with lung fibrotic disorders. The present study examined the sources of plaminogen activator (PA) changes induced by a single intratracheal administration of silica particles (5 mg) in the mouse lung. We found in both control and silica-treated animals that amiloride almost totally abolished PA act...

This review provides a global overview of microporous silica based membranes for desalination via pervaporation with a focus on membrane synthesis and processing, transport mechanisms and current state of the art membrane performance. Most importantly, the recent development and novel concepts for improving the hydro-stability and separating performance of silica membranes for desalination are ...

Spontaneous cascaded Raman amplification is demonstrated as a practical and efficient means of power transfer from telecommunications wavelengths to mid-IR wavelength bands through use of conventional silica fibers and amplifiers. We show that silica fibers possessing normal dispersion over all near-IR and mid-IR wavelengths can facilitate 37% and 16% efficient Raman power conversion from 1.53 ...

Hermetic aluminum-coated fused silica fibers can withstand high stress levels without failure for prolonged periods of time in water-containing environments. Aluminum-coated fibers from several sources exhibit differences in strength. The aluminum and silica surfaces have been examined using SEM and AFM in order to understand this variation. Differences in the interfacial interaction between al...