fourier transform infrared (ftir) and gel permeation chromatography (gpc) wre respectively utilized in determining the changes in isocyanate (nco) concentration and molecular weight (mw) and its distribution (mwd) in polyurethanes during their cure and postcure stages. samples, originally cured at 45°c, were taken through accelerate aging tests at various temperatures. the ftir and gpc analytic...

Nickel-cobalt spinel catalyst (NCO) is a promising for air oxidation of humic acid, which typical natural refractory organic matter and precursor toxic disinfection by-products. In this study, reductive etchers, NaBH4 or Na2SO3, were used to adjust the NCO surface structure increase performance. The modified (NCO-R) was characterized, relationship between its intrinsic properties catalytic path...

As part of the Survey of Painters and Repairers of Auto bodies by Yale (SPRAY), the determinants of isocyanate exposure in auto body repair shops were evaluated. Measurements (n = 380) of hexamethylene diisocyanate-based monomer and polyisocyanate and isophorone diisocyanate-based polyisocyanate were collected from 33 auto body shops. The median total reactive isocyanate concentrations expresse...

Fourier transform infrared (FTIR) and gel permeation chromatography (GPC) wre respectively utilized in determining the changes in isocyanate (NCO) concentration and molecular weight (MW) and its distribution (MWD) in polyurethanes during their cure and postcure stages. Samples, originally cured at 45°C, were taken through accelerate aging tests at various temperatures. The FTIR and GPC anal...

A spectral survey of NCO absorption near the P1 + 'Qli head of the [A 2Z +(00°0)«-A'J/71<00I0)] band was obtained at 1450°K, 0.6 atm using a remotely located cw ring dye laser source and a shock tube. Mixtures of hydrogen cyanide, oxygen and nitrous oxide diluted in argon were shock heated to provide a reproducible steady-state concentration of NCO, and narrow-line absorption was measured in re...

Little is known about the chemistry of isocyanates (compounds with functional group R-N=C=O) in interstellar medium, as only four them have been detected so far: isocyanate radical (NCO), isocyanic acid (HNCO), N-protonated (H$_2$NCO$^+$) and methyl (CH$_3$NCO). The molecular cloud G+0.693-0.027, located Galactic Centre, represents an excellent candidate to search for new since it exhibits high...

PURPOSE To develop an automated approach for segmenting the neural canal opening (NCO) and cup at the level of the retinal pigment epithelium (RPE)/Bruch's membrane (BM) complex in spectral-domain optical coherence tomography (SD-OCT) volumes. To investigate the correspondence and discrepancy between the NCO-based metrics and the clinical disc margin on fundus photographs of glaucoma subjects. ...

In this paper we propose parallel loop filter (LPF) and Number Controlled Oscillator (NCO) of carrier tracking loop in all-digital parallel receiver (APRX), according to the theoretical derivation of LPF and NCO in serial receiver. The Monte Carlo simulation results show that, the acquisition time, phase error response performance and tracking range of parallel LPF and NCO are better than that ...

We report the first measurement of the vibrationaland rotational-state distributions in the NCO fragment resulting from photolysis of HNCO. Recent studies have drawn conclusions about the photochemistry of HNCO and the vibrational distribution in the NCO fragment from observations of the kinetic energy distribution of the H atom produced in this photolysis; however, there has been no direct obs...

Although the past decade has seen tremendous progress in our understanding of fine-scale recombination, little is known about non-crossover (NCO) gene conversion. We report the first genome-wide study of NCO events in humans. Using SNP array data from 98 meioses, we identified 103 sites affected by NCO, of which 50/52 were confirmed in sequence data. Overlap with double strand break (DSB) hotsp...