Positive spectrum

Positive SIMS spectra obtained from plasma polymerized acetylene films on polished steel substrates after reaction with the model rubber compound for times between zero and 65 min are shown in Fig. 44. The positive spectrum obtained after zero reaction time was characteristic of an as-deposited film of plasma polymerized acetylene. However, as reaction time increased, new peaks appeared in the positive SIMS spectrum, including m/z = 59, 64, and 182. The peaks at 59 and 64 were attributed to Co+ and Zn, respectively, while the peak at 182 was assigned to NH,J(C6Hn)2, a fragment from the DCBS accelerator. The peak at 59 was much stronger than that at 64 for a reaction time of 15 min. However,... 

Exposure of animals to therapeutic levels of antibiotics will markedly raise the level of resistance and a long period of time is required for the resistance levels to return to the pre-treatment level In an experiment replicated five times (Lang lo is et al ifi.) we found that exposure of animals to subtherapeutic levels of gram-positive spectrum antibiotics also resulted in increased levels of tetracycline resistance During the course of our study we have sampled pigs on two separate occasions (1974 and 1985) from another research herd in which antibiotics have never been used as feed additives but only for therapeutic purposes Of the 100 pigs sampled in 1974 only one had been... 

Ceftiofur is marketed as a "new" generation cephalosporin as it does not clearly fall into the previous classification scheme. It is currently approved for the treatment of streptococcal infections in horses. It has broader Gram-positive spectrum of activity than the third-generation cephalosporins and has activity against anaerobes. Ceftiofur has no activity against Pseudomonas spp. and does not penetrate into the CNS. It is metabolized very rapidly in vivo to its active metabolite desfuroylceftiofur. Desfuroylceftiofur is very highly protein bound because of a sulfhydryl... 

The atomic ions of electropositive elements appear with greater intensity in the positive spectrum (Fig. 3) while the electronegative elements favor negative ion formation (Fig. A). 

Figure 22 Positive spectrum from phenylalanine on a Ag foil obtained with 2.25 keV Ar+ bombardment under static SIMS conditions (from Ref. 22).

Figure 11 (a) Positive and negative time-of-flight SIMS spectra of a 100x100 xm area of the metal side of the interface between an epoxy cataphoretic paint system and phosphated cold-rolled steel. The paint was slightly overcured (b) as in (a) but positive spectrum of paint side (c) as in (a) but paint was undercured metal side (d) as in (c) but positive spectrum of paint side. (From Ref. 24.)... 

The mass spectrum in Figure 4.12 shows the positive spectrum background when a mixture of sUghtly acidified water and methanol is eluting from the capillary tip. The spectrum has many weak peaks, but the major ion masses are assigned in Table 4.1. 

The PSAR of the CEFR was finished in May of 1998, but the review lasted 2 years. The primary pipe rupture accident is the key accident and the most important topic in this review. The owners (us) think that the 0.25DT (D is the diameter of the pipe and T is the thickness of the pipe) size break initial event should be a DBA (Design Base Accident), but the double-ended guillotine break instantaneous should be a BDBA (Beyond DBA). However, the reviewer was of the opinion that the double-ended instantaneous guillotine break should be DBA. The owner should calculate the break position spectrum in order to find the most serious case. 

Base Accident), we calculated almost all the cases, the break position spectrum, the break continue time spectrum, the break position spectrum, the break size spectrum, and so forth. 

In this paper we show the main result of the break position spectrum calculations. The restrictive reactor safety and conservative assumptions requested by the authorities are applied in these calculations. 

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