N production

Therefore, the amount of water present determines the concentration of N02 and hence the extent of nitration. The degree of cellulose nitration is designated by the nitrogen content. The maximum commercial DS is 2.9, which corresponds to 13.8% N. Products over 14% N have been obtained by special processes (51—54). 

Erzeuger, m. producer generator maker. Erzeugnis, n. production, product produce. Erzeugung, /. production, etc. (see erzeugen). Erzeugungsort, m. place of production. 

Produkt, n. product produce. Produktions-fiihigkeit, /. productiveness, productivity. -leistung, /. productive capacity. Produktivitat,/. productivity. 

Rost-erz, n. roasted ore, calcined ore. -er-zeugnis, n. product of roasting, of calcining, etc. (see rdsten). 

Umsatz, m. exchange change, transformation sale, business, -produkt, n. product of exchange, spscif. metabolism product. Umschaltbrett, n. switchboard, umschalten, v.t. (also Elec.) reverse Elec.) commutate. 

The proof is by induction. It is clearly true for two factors since then it reduces to the definition of the contraction symbol. Furthermore, it is sufficient to prove the theorem under the assumption that Z is a creation operator and that all the operators UV XY are destruction operators. If UV- - -XY are all destruction operators and Z is a creation operator, we may then add any number of creation operators to the left of all factors on both sides of Eq. (10-196) within the N product, without impairing the validity of our theorem, since the contraction between two creation operators gives zero. If on the other hand Z is a destruction operator and UV - - - are creation operators, then Eq. (10-196) reduces to a trivial identity... 

Since DN(UV-- -XY)Z = N(DUV- - -XY)Z, the theorem is proved for n + 1 factors. This lemma can be generalized by multiplying both sides of Eq. (10-196) by an arbitrary number of contracted factors, and using Eq. (10-195) to bring these factors within the N products. Wick s theorem now states that a T product can be decomposed into a unique sum of normal products as follows ... 

Nitrostarch characterized by a N content below 8.0% is scarcely soluble in eth-alc. Thus the solubility of a 6.4% N-product is only 8.4% Nitrostarch dissolves in ale more easily than NC, and at a N content of 10.0—11.5% is wholly soluble in ethyl ale. Incomplete dissolution indicates Nitrostarch of higher or lower N percentage. A product containing 12.1% N has a solubility of 32.5%... 

When Ptjj,jCOp jM was reduced at 350°C for Ih in Hj flow the result obtained was totally different. In effect, a significant increase ofNO conversion and selectivity was observed (Fig. 1). Besides, the sanple remained stable during the successive reaction cycles and also through time at constant tenperature. Hie order in whidi the exchange wasperformed didnot have significant inportance on the N production but increased the CH to COj conversion in the whole tenperature range. 

However, as pointed out in [2], it remains to be seen to what extent the Meynet Maeder [4] yields for N in the intermediate mass star range would increase once the hot bottom burning (HBB) is taken into account. Although Meynet Maeder did not formally include the third dredge-up and HBB, they predict an important N production in low and intermediate mass stars, at low metallicities. In absence of a real quantitative assessment of the importance of the HBB it is interesting to study the importance of this new process, which produce non-parametric yields, independently of HBB. 

In the massive range, the yields of Meynet Maeder predict some primary N production. In [2] we showed that models for the MW computed with this new set of yields lead to a plateau in log(N/0), due to massive stars with initial rotational velocities of 300 kmsec 1, at log(N/0) —4. This value is below the value of —2.2 dex observed in some DLAs and hence we suggested that in these systems both, massive and intermediate mass stars, would be responsible for the N enrichment. This is at variance with recent claims that massive stars were the only ones to enrich systems which show a log(N/0) —2.2. 

The type of treatment applied significantly affected the benzene/naphthalene (B/N) product ratio (Fig. 6). Thus, treatment with oxalic and citric acids, steaming plus HC1 washing, and partial Cs-exchanged increased the B/N ratio with respect to the untreated sample. In the first three cases, this effect may be explained by a preferential removal of the acid sites at the external zeolite surface, where naphthalene is predominantly formed [6], The reason of the increased B/N ratio in the 3Mo/CsHZ5 sample still needs to be elucidated, but a decrease in surface acidity in combination with an enhanced shape selectivity effect due to presence of voluminous Cs+ cations inside the micropores (a decrease in Vmicrop was noticed in Table 1) may be hypothesized. 

Table 7.5. He, C and N production from intermediate-mass stars. Version 1...

The predicted effects of NO adsorption time on the time delay between the maxima in NH3 and N production and the maxima in H2O and N2 production are shown in Fig. 17. It is seen that the predictions bound the experimental observations and show the the proper trend with increasing NO exposure. 

Assume that there are n products with demand densities 8, ...8n, already received orders ri,... rn, and available stock si,... sn. Assume that ti, - h time units are needed to produce one unit of product on a given production train and that pi,... pn are the marginal profits achieved per additional unit of each product. The optimal capacity assignment is the vector x which maximizes the function X ,"=i M ( S+.r , +% ) Pi subject to the constraints Xi > 0 and XiU < t, t being the length of the period. 

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