Nitrogen content relation

For this particular product, in addition to a decrease in analysis time, a non-destructive method is especially desirable because of other physical tests that are also required on each sample By FNAA, the total nitrogen content of a sample is first detd and then related to compn of the mixture. Since Octols contain no ingredients other than pure TNT (18.50% N) and pure HMX (37.84%), the following linear relationship is derived from the ealed nitrogen content of each ingredient ... 

New aluminophosphate oxynitrides solid basic catalysts have been synthesised by activation under ammonia of an AIPO4 precursor. When the nitrogen content increases, XPS points out two types of nitrogen phosphorus bonding. The conversions in Knoevenagel condensation are related to the surface nitrogen content. Platinum supported on aluminophosphate oxynitride is an active catalyst for isobutane dehydrogenation. 

Edwards KF, Pfister CA, Van Alstyne KL (2006) Nitrogen content in the brown alga Fucus gardneri and its relation to light, herbivory and wave exposure. J Exp Mar Biol Ecol 336 99-109... 

Mattson WJ (1980) Herbivory in relation to plant nitrogen content. Annu Rev Ecol Syst 11 119-161... 

For n = 15 cereal samples from barley, maize, rye, triticale, and wheat, the nitrogen contents, y, have been determined by the Kjeldahl method values are between 0.92 and 2.15 mass% of dry sample. From the same samples near infrared (NIR) reflectance spectra have been measured in the range 1100 to 2298 nm in 2nm intervals each spectrum consists of 600 data points. NIR spectroscopy can be performed much easier and faster than wet-chemistry analyses therefore, a mathematical model that relates NIR data to the nitrogen content may be useful. Instead of the original absorbance data, the first derivative data have been used to derive a regression equation of the form... 

Millard, P. (1986). The nitrogen content of potato (Solanum tuberosum L.) tubers in relation to nitrogen application -the effect on amino acid composition and yields. Journal of the Science of Food and Agriculture, 37,107-114. 

Various attempts have been made to relate the hygroscopicity of NC to its nitrogen content. For uncolloided NC at 30 to 70% RH the % moisture —14.6-%N. Thus for pyro cotton (12.6%N) calc % moist = obs moist =... 

The linear (inverse) relation between NC moisture content and NC nitrogen content was also noted in Ref 5... 

The stability and insensitiveness of NC (when dry) bear an inverse relation with nitrogen content. That is, as the nitrogen content increases, stability decreases slowly and NC becomes more sensitive. On the other hand, lower nitrates are very stable and insensitive to impact and friction. The stability and insensitiveness fall off rapidly above a nitrogen content of 12.8%. 

Insufficiently purified, non-stabilized nitrocotton demonstrates a variable value of An/At. The evolution of nitrogen as a function of time is illustrated in the diagram (Fig. 112). The curves I-IV relate to nitrocellulose of a high nitrogen content (13% N) boiled in water for different periods from 30 to 100 hr. The longer the time of boiling, the more the curve approaches a straight-line. Finally, after 100 hr... 

Nitrogen content % Number of nitro groups in relation to C6 Molecular weight of a Cgunit Heat of formation ... 

The first extensive investigations into the relation between the nitrogen content of nitrocellulose and the composition of the mixed add were carried out by Bruley (14]. They are summarized graphically in Fig. 119. 

Recently extensive investigations on the nitration of starch, mainly by using mixed nitric and sulphuric acid have been carried out by Kunz and T6th [46]. Their object was to determine the effect of the ratio of the components in the nitrating mixture and the activity of nitric acid in the mixtures on the nitrogen content of the nitrostarch, the heat of esterification, and the relation between the nitration temperature and the viscosity of the product. Their observations concerning the time of reaction are of special interest. This varies as a linear function of the nitration temperature. In the graph (Fig. 169) the relationship is shown for two mixed acids ... 

Despite the excellent properties of honey, mead production faces several problems, namely, delays and pouts fermentations, lack of product uniformity, and production of yeast off-flavors. Many factors might be related with these problems, such as honey variety, temperature, medium composition (vitamin and nitrogen content), fermentative yeast, and pH. Due to all these factors, mead production has decreased over the years. To overcome this situation, more research is needed to optimize the production of this beverage. 

In relation to yeast strain selection, few studies have been conducted on this subject. It will be necessary to find/isolate yeast strains more resistant to, and with better fermentation performance under the harsh conditions of mead production, such as high osmotic values and low nitrogen content. Breeding may be an option. 

The major question involving burning characteristics of coal liquids relates to the higher nitrogen content compared to petroleum fuel oils and the potential effect on NO emissions. Since NO emissions are sensitive to burning conditions, however, actual burning tests are required under various conditions to assess the effects. 

There are significant differences in the nitrogen and organic sulfur contents related to the concentrations of these elements in the starting coals. 

Combustion tests of fuel oil blends derived from the Exxon Donor Solvent (EDS) process were carried out in a laboratory 50 hp test boiler and a commercial 1425 hp boiler. All tests showed that coal derived fuel oils burn cleanly compared to petroleum fuels with low levels of smoke and particulates. Emissions of N0X were related to fuel nitrogen content for both the petroleum and coal-derived fuels. 

Engel A, Passow U (2001) Carbon and nitrogen content of transparent exopolymer particles (TEP) in relation to their Alcian Blue adsorption. Mar Ecol Prog Ser 219 1-10... 

The oxidation of chars prepared from nitrogen-containing precursors has been investigated. Chars produced from the nitrogen-containing compounds acridine and phenanthridine were oxidized at atmospheric pressure at temperatures of 773-873 K. The relative rates of nitrogen and carbon release and the formation of NO have been determined in relation to char nitrogen content and precursor type. 

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