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Showing 1-19 of 19 results for "181625" within Papers
Y Liu et al.
Solid state nuclear magnetic resonance, 2(6), 289-306 (1993-12-01)
31P Hahn spin echo line shape and proton line shape experiments are reported on bisphenol A polycarbonate (BPAPC)-tris(2-ethylehexyl)phosphate (TOP) systems to study the concentration and temperature dependence of the local dynamics. In an earlier 31P line shape study a lattice
L Feenstra et al.
Clinical otolaryngology and allied sciences, 9(4), 215-220 (1984-08-01)
A review is given of the development of the concept of an artificial tympanic membrane. Starting with homologous tympanic membranes we compared biodegradable collagen materials (homologous and heterologous) and biodegradable synthetic materials, poly-glycolic acid, poly-lactic acid and poly-alpha-amino acids. As
M Yalon et al.
Journal of cataract and refractive surgery, 14(4), 393-395 (1988-07-01)
Bisphenol-A polycarbonate has been investigated as an improved polymer for ocular implants, especially for intraocular lenses (IOLs). Polycarbonate properties afford special opportunities for development of tougher, stronger, one-piece IOLs. Autoclave or gamma sterilizability and a higher refractive index may provide
M Utz et al.
Journal of magnetic resonance (San Diego, Calif. : 1997), 128(2), 217-227 (1997-11-14)
A method is proposed for the quantitative measurement of orientational anisotropy in glassy solids based on 2D dipolar NMR spectra with sample flipping (dipolar DECODER experiment). Purely dipolar spectra are obtained by chemical shift refocusing by a multiple pulse sequence.
Leon Coulier et al.
Journal of chromatography. A, 1130(1), 34-42 (2006-06-01)
Hyphenation of infrared spectroscopy (IR) to liquid chromatography (LC) has been applied to study chemical changes in poly(bisphenol A)carbonate (PC) as a result of degradation. Especially coupling of LC to FTIR through solvent elimination is a sensitive approach to identify
F E Kohn et al.
The International journal of artificial organs, 7(3), 151-162 (1984-05-01)
Until 1950 the treatment of a perforated eardrum consisted of covering the drum permanently with artificial material. Since then a surgical technique to establish a functional reconstruction of the eardrum was developed (myringoplasty). A survey of the biological grafting materials
Vianney Souplet et al.
Methods in molecular biology (Clifton, N.J.), 570, 287-297 (2009-08-04)
Microarrays are frequently prepared on microscope glass slides. However, glass substrates can break or cut and thus can lead to the contamination of the manipulator during the analysis of biological samples. Alternately, bisphenol A polycarbonate (PC) is shock-resistant and, in
B Kesling et al.
Solid state nuclear magnetic resonance, 16(1-2), 1-7 (2000-05-16)
Solid-state NMR experiments are performed on amorphous blends of tri-p-tolylamine (TTA) and polycarbonate. Amines that are similar to TTA are blended with polycarbonates and used as photoconducting components in xerography. Because of its simple molecular structure, TTA is a charge-transporting
L Feenstra et al.
The International journal of artificial organs, 3(6), 354-357 (1980-11-01)
Artificial eardrums made from biodegradable poly(D,L-lactic acid), poly(glycolic acid) and poly(beta-benzyl-L-aspartate-co-L-leucine) 50/50, and made from the microporous poly(tetrafluoroethylene) and bisphenol-A poly(carbonate) membranes were implanted into the ear and as a reference subcutaneously in rats. The implants were histologically examined for
Georgia P Tsintzou et al.
Journal of hazardous materials, 241-242, 137-145 (2012-10-10)
The various and widespread uses of polycarbonate (PC) polymers require a meaningful and environmentally friendly disposal method. In this study, depolymerisation of polycarbonate with water in a microwave reactor is suggested as a recycling method. Hydrolysis was investigated in an
R A Wind et al.
Solid state nuclear magnetic resonance, 1(2), 55-65 (1992-06-01)
We have investigated the EPR and DNP behavior of a molecularly doped polymer modeling those used to transport electronic charge in electrophotography. The EPR spectra show no evidence of the superexchange reported for a closely related system based on tri-p-tolylamine.
K W Jacobi et al.
Fortschritte der Ophthalmologie : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft, 86(3), 203-205 (1989-01-01)
The first intraocular lens implanted in a human eye 39 years then lenses ago, was made of polymethylmethacrylate (PMMA). Today this material is considered to be the standard, so every new type of material is compared to PMMA and must
A lotus-leaf-like superhydrophobic surface prepared by solvent-induced crystallization.
Ning Zhao et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 7(4), 824-827 (2006-03-10)
L Coulier et al.
Journal of chromatography. A, 1070(1-2), 79-87 (2005-05-03)
Size exclusion chromatography (SEC), gradient polymer elution chromatography (GPEC) and liquid chromatography at critical conditions (LC-CC) have been developed and applied to observe chemical changes in poly(bisphenol A)carbonate (PC) due to hydrolytic degradation. Especially LC-CC appeared to be very successful
A study on the effect of gamma radiation sterilization of polycarbonate (LMW).
M Jayabalan et al.
Biomedical sciences instrumentation, 23, 149-153 (1987-01-01)
Molla R Islam et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 17(22), 6098-6108 (2011-04-19)
Spontaneous phase-separated, controlled aggregate structures of photo- and electroactive molecules in polymer matrices are of interest for device fabrication. We show that the self-assembly of octabutoxyphthalocyanine (Pc) in polymer matrices leads to tubular morphology of Pc when the film is
Eddo J Hoekstra et al.
Critical reviews in food science and nutrition, 53(4), 386-402 (2013-01-17)
The release of Bisphenol A (BPA) from polycarbonate baby bottles into food and food simulants is reviewed in the perspective of the current intensive discussions on the risks of this substance. Potential factors that have been reported to influence the
Hiroshi Yabu et al.
Langmuir : the ACS journal of surfaces and colloids, 22(11), 4992-4997 (2006-05-17)
We describe here a preparation of pincushion structures with holes, hexagonally arranged microrings, and microdots by simple heating and peeling of self-organized honeycomb-patterned films. We have reported that the honeycomb-patterned films can be prepared by casting the solution of an
Yuki Kitahara et al.
Chemosphere, 80(11), 1281-1284 (2010-07-16)
The thermal decomposition of poly(bisphenol A carbonate) (PoC) results in the formation of the endocrine disruptor bisphenol A (BPA). In the present work, we investigated the kinetics of the thermal decomposition of PoC, and the subsequent decomposition of BPA, under
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