Carbon weight percent

Methyl Ester Carbons Weight Percent of Total Methyl Esters ... 

Weight percent carbon Weight percent hydro- 84-89 80-86... 

POC Flux (mg m d ) Percent of organic carbon Weight percent... 

Carbon tetrachloride index for activated carbon weight percent of carbon tetrachloride adsorbed at a partial pressme of 0.1505 atm (114 torr) and a carbon temperature of 25°C obsolescent. 

The thermal glass-transition temperatures of poly(vinyl acetal)s can be determined by dynamic mechanical analysis, differential scanning calorimetry, and nmr techniques (31). The thermal glass-transition temperature of poly(vinyl acetal) resins prepared from aliphatic aldehydes can be estimated from empirical relationships such as equation 1 where OH and OAc are the weight percent of vinyl alcohol and vinyl acetate units and C is the number of carbons in the chain derived from the aldehyde. The symbols with subscripts are the corresponding values for a standard (s) resin with known parameters (32). The formula accurately predicts that resin T increases as vinyl alcohol content increases, and decreases as vinyl acetate content and aldehyde carbon chain length increases. 

The process of burning out the impurities is slowest in the open-hearth furnace. This implies there is plenty of time to analyze the melt and add whatever is needed to obtain the desired chemical composition. Manganese, vanadium, and chromium are frequent additives. The properties of the finished steel depend upon the amount of carbon left in and upon the identity and the quantity of other added elements. Soft steel, for example, contains 0.08-0.18 weight percent carbon structural steel, 0.15-0.25% hard steel ox toot steel, 1-1.2%. 

The main mechanism for removal of organic carbon from the ocean is burial in sediments. This flux is equal to the average global sedimentation rate for marine sediments times their weight percent organic carbon. The total sink... 

Proton and carbon-13 nuclear magnetic resonance (NMR) spectra were recorded on a IBM Instruments 270 MHz NMR Spectrometer on 6-8 weight percent solutions in deuterated chloroform. Ultraviolet spectra were recorded on an IBM Ultraviolet Spectropluitometer Model 9420 using chloroform solutions containing 2 x 10-5 g/ml of the copolymers. 

Table 7 shows the calculated weight percent of calcium carbonate and titanium dioxide in the white-colored paint sample. These levels are based on the calcium and titanium levels shown in Table 6. Calcium carbonate was evident by the FTIR spectrum acquired from the dried paint sample, shown in Figure 13. (Flad it been available, Raman spectroscopy, which gives ready access to the low wavenumber region, could have been used to confirm the presence (and polymorphic form) of titanium dioxide [4].) Given the white color of the paint, it is likely that the titanium present was present as titanium dioxide, and this was assumed in the calculations. The calculated weight percentage of calcium carbonate in the dried paint is 21.7 wt%, and 12.6 wt% in the paint containing the solvents. The titanium dioxide levels were calculated to be 30.6 and 17.7 wt% in the dried and solvent-containing paint sample, respectively.

Also presented were data on carbon-coating of graphite powder using a propylene gas thermal decomposition processes. High weight percent amorphous carbon-coatings are possible with this method, and the process appears uniquely suited to materials that are reductively stable to 700°C. The coated materials work better in the 30% PC electrolyte solutions, thus showing better resistance to solvent co-intercalation problems versus uncoated types. 

ZJ at 293.15°K and the K2CO3-CO2 aqueous solution of tTTe Hot Carbonate Process with temperatures from 343.15°K to 413.15°K and concentrations up to 40 weight percent equivalent potassium carbonate. The success of the correlations suggests the validity of the model for aqueous electrolyte systems of industrial interest. 

Carbonate and opal-free weight percent of quartz in marine sediments. Source-. From Leinen, M.,... 

In order to increase the contact of a catalyst with hydrogen and the compounds to be hydrogenated platinum (or other metals) is (are) precipitated on materials having large surface areas such as activated charcoal, silica gel, alumina, calcium carbonate, barium sulfate and others. Such supported catalysts are prepared by hydrogenation of solutions of the metal salts, e.g. chloroplatinic acid, in aqueous suspensions of activated charcoal or other solid substrates [28. Supported catalysts which usually contain 5, 10 or 30 weight percent of platinum are very active, and frequently pyrophoric. 

The calcium source for the crystallization is the aragonite form of calcium carbonate which is wet ballmilled with closed-loop hydrocyclone classification to ninety-five percent minus two hundred mesh. The thirty weight percent aragonite slurry is fed to the crystallizer by pH control. A very pure carbon dioxide stream evolves from the crystallizer. 

Tlie physical properties of the silica such as pore diameter play an important role in determining the amount of hydrocarbon which can be bound to the support. The latter is conveniently expressed by the carbon load Cs i.e., by the weight percent of caiton in the dry stationary phase as measured by elemental analysis. The carbon load of the product usually increases with the reaction time or temperature, as well as with the relative amount of the silanizing agent in the mixture, until a maximum value is reached. 

When a combustible substance is mixed with air, the mixture will explode only when it is neither too rich nor too lean. The lower explosion limit (LEL) is the minimum volume percent of the substance in air with flammability, which is separated from the upper explosion limit (UEL) by the explosive concentration range. The tabulations in handbooks are based on experimental data, and sometimes derived from estimation methods based on the elemental composition of the fuel as CmEtxOy. Figure 6.11 shows the LEL for the series of normal paraffins and of 1-alcohols versus the number of carbon atoms. There are two ways to plot the results, which show that, for paraffins, the volume percent shows a steeply declining trend, but the weight percent shows a mildly increasing trend. One may conclude that a smaller volume percent of higher paraffin... 

Starting with 10 weight percent sucrose (C12H22O11) in water and assuming that half of the carbon atoms in the sucrose are converted into ethanol (the above stoichiometry), find the times required to produce 3.5 weight percent alcohol (1% sucrose remaining) for initial concentrations of yeast of 0.00001, 0.0001, 0.001, and 0.01 molar. It is found that 2 h are required for this conversion if the initial yeast concentration is maintained at 1 molar. Assume that the density is that of water. 

The latter method has been developed to form carbon nanotubes coated with Si02 and oxide clusters of Ni, Cu, Cr or Co [6]. But, in all cases the amount of incorporated guest species is limited to a few weight percents. 

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