Enemy

Clearly there was no lack of devoted adversaries (perhaps a more proper term than enemies) on both sides of the norbornyl ion controversy. It is to their credit that we today probably know more about the structure of carbocations, such as the norbornyl cation, than about most other chemical species. Their efforts also resulted not only in rigorous studies but also in the development or improvement of many techniques. Although many believe that too much effort was expended... 

The western pine beetle Dendroctonus brevicomis is perhaps the most destmctive insect enemy of western pine forests. The aggregation pheromone is a mixture of the terpenoid myrcene [123-35-3J (163) from the tree and the frass pheromones exo-hsevicomki [20290-99-7] (164) and frontalin [28401-39-0] (165). The Norway spmce beede Ips tppopraphus converts the tree terpenoid myrcene into the frass pheromone ipsdienol [33628-00-3] (166) and the beedes also produce 2-methyl-3-buten-2-ol [115-18-4] and rir-verbenol [473-67-6] (167), all of which are components of the aggregation pheromone. 

Incapacitants are most suitable for consideration in limited warfare situations, eg, when enemy troops are intermingled with a friendly population, or in a city that is a key military objective. The purpose is to capture the enemy without killing the civiUans. Incapacitating agents should produce no permanent after-effects and allow for complete recovery. 

It is commercially prepared from benzaldehyde and hydrogen cyanide. Mandelonitrile is used by certain insects (tiger beedes, an African millipede) as a defense duid (38). After expelling the duid an enzyme catalyzes the conversion of mandelonitrile to benzaldehyde and HCN, which is usually fatal to the insect s enemy. 

Dissolved oxygen is the enemy of anaerobic bacteria. Naturally occurring corrosion consumes oxygen. Without convective replenishment, oxygen-depleted zones form and corrosion by anaerobes is usually worse. 

Balance - indicates less heat generated. Heat is the principal enemy of all mechanical seals. There simply is no logical reason for specifying unbalanced seals. 

McQuaid, J. (1991). Know Your Enemy The Science of Accident Prevention. Trans. IChemE 69, Part B (February), 9-19. 

Dixon, N. F. (1987). Our Own Worst Enemy. London Jonathan Cape. 

Although a plan for a city dii ided by a river may not be applicable to a desert city on a seismic fault, duplication can be an enemy of cost efficiency. Thus wherever possible, any emergency plans diat already exist in die community should be used as a starting point. Coinmunity groups diat may have developed such plans include civil defense organizadons, fire departments, die Red Cross, public health agencies, and local industry councils. Existing plans should be studied and their applicability to the proposed community plan evaluated. 

In a departure from his usual and highly popular westerns, author Louis L Amour wrote a novel in 1987, Best of the Breed (Bantam Press), in which a military pilot of native American ancestry is shot down over the former Soviet Union and is forced to use the survival skills of his ancestral culture to escape his enemies. On the rare occasions when he is able to trap and kill an animal for food, he selectively eats the fat, not the meat. Based on your reading of this chapter, what is his reasoning for doing so ... 

Situation Assessment, such as the determination of whether a given automaton is surrounded by friendly or enemy forces. 

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