Results 221 to 230 of about 34,849 (295)
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, 2020
Metal-free g-C3N4 is widely used in photocatalytic reactions owing to its suitable band structure. However, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carriers have high recombination rates.
Xuewen Wang +6 more
semanticscholar +1 more source
Metal-free g-C3N4 is widely used in photocatalytic reactions owing to its suitable band structure. However, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carriers have high recombination rates.
Xuewen Wang +6 more
semanticscholar +1 more source
Optometry and Vision Science, 1972
ABSTRACT The hydration course from standard room conditions to saline saturation at 288 hours was followed for a common contact lens plastic. Mass was found to increase by 1.4%, axial length by 0.5% and face dimensions by 0.4%.
F C, Flower, R M, Hill
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ABSTRACT The hydration course from standard room conditions to saline saturation at 288 hours was followed for a common contact lens plastic. Mass was found to increase by 1.4%, axial length by 0.5% and face dimensions by 0.4%.
F C, Flower, R M, Hill
openaire +2 more sources
Optimizing outcomes with polymethylmethacrylate fillers
Journal of Cosmetic Dermatology, 2018SummaryIntroductionThe ideal filler should be long‐lasting, biocompatible, chemically inert, soft and easy to use, and have a long history of safety. This review focuses on the evolution and development of the PMMA‐collagen gel, Bellafill, and the 10 years of postmarketing experience of Bellafill since it received premarket approval (PMA) from the FDA ...
M. Gold, N. Sadick
semanticscholar +3 more sources
The Mechanics of Polymethylmethacrylate Augmentation
Clinical Orthopaedics & Related Research, 2006Osteoporosis frequently leads to vertebral compression fractures. Percutaneous cement augmentation, one recent technique, may alter the biomechanics of the vertebral body and spinal segment. These alterations reportedly predispose the spinal segment to additional vertebral compression fractures.
Mark, Kayanja +3 more
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Investigations with bioactivated polymethylmethacrylates
Journal of Biomedical Materials Research, 1979AbstractCompound bone cement on a PMMA base with an additive of bioactive glass ceramic particles in different portions and different particle sizes are tested in animal experiments. The tissue reactions to extracorporal polymerized specimens and to in situ polymerized specimens are observed. The experiments with an implantation period up to six months
W, Hennig +5 more
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A New Polymethylmethacrylate Membrane for Hemodialysis
The International Journal of Artificial Organs, 1996High molecular weight (MW) solutes are not removed during conventional hemodialysis (HD), and their accumulation is thought to play a role in some long-term HD complications (anemia, bone and joint pain, neuropathy, itching).
BONOMINI, Mario +5 more
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Surface Science Spectra, 1993
X-ray photoelectron spectroscopy was used to analyze a thin film of polymethylmethacrylate (PMMA) which was spin cast from a 2% weight solution of PMMA in toluene onto a gold substrate. A Hewlett Packard 5950A ESCA spectrometer was used for this investigation.
Scott W. Rosencrance +3 more
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X-ray photoelectron spectroscopy was used to analyze a thin film of polymethylmethacrylate (PMMA) which was spin cast from a 2% weight solution of PMMA in toluene onto a gold substrate. A Hewlett Packard 5950A ESCA spectrometer was used for this investigation.
Scott W. Rosencrance +3 more
openaire +1 more source
Electrostriction of polymethylmethacrylates
Colloid & Polymer Science, 1982Electrostriction of tactic polymethylmethacrylates in response to step-on and step-offdc-fields was investigated in the field strength range from 1 to 5 MV m−1 at room temperature; one example of electrostriction under sinusoidal field is given. Three principal retardation time regions were found: τ1=1.5 s, τ2=30 s, and τ3=140 s, each field strength ...
K. Ohara, M. Hennecke, J. Fuhrmann
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Dermatologic Surgery, 2019
BACKGROUND Little literature exits on the mechanism of action of implanted polymethylmethacrylate (PMMA) filler. OBJECTIVE To characterize PMMA-induced dermal extracellular matrix production in the skin.
S. Ronan +4 more
semanticscholar +1 more source
BACKGROUND Little literature exits on the mechanism of action of implanted polymethylmethacrylate (PMMA) filler. OBJECTIVE To characterize PMMA-induced dermal extracellular matrix production in the skin.
S. Ronan +4 more
semanticscholar +1 more source
A characterization of polymethylmethacrylate bone cement
The Journal of Bone & Joint Surgery, 1975Polymethylmethacrylate cement is characterized in terms of chemical composition, handling characteristics, and physical properties; the dough time, setting time, handling time, and temperature rise were found to be most affected by environmental temperature and kneading of the dough mass. As the set material ages, the residual monomer content gradually
S S, Haas, G M, Brauer, G, Dickson
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