Ambivalence

The dianilinopolycarhocyanines, CgH5HN=CH-(-CH=CH NHCg Hg, are useful synthetic iatermediates for polymethine dyes, offering needed spectral and other properties (3,4,73,74). The asymmetrical polymethines appear to be ambivalent systems, and the number of possible reaction paths iacreases considerably as a result (75,76). 

Temperature is the hardest parameter to control in a fractionation system. It exhibits high process and measurement lag. Temperature can also be ambivalent as a measure of composition. Pressure changes are reflected quickly up and down the column. Temperature changes are not. It is typical to provide three-mode controllers for all temperature applications. 

Most of the material presented in this section are reactions of sulfur trioxide. This compound is ambivalent and frequently forms a carbon-sulfur bond (true sulfonation), but it can form a carbon-oxygen bond as well. Examples of both types of bonding are included... 

The major finding of the study was that the manual blowdown philosophy, particularly with respect to gas situations, was not clearly defined. This was most apparent in the offshore attitudes and perceptions regarding the importance of blowdown as a safety system. No decision criteria specifying when blowdown should or should not be activated were provided for the support of control room staff. Blowdown was essentially left to the discretion of the workers. Consequently, the offshore interpretation of this vagueness and ambivalence amounted to a perceived low priority of blowdown. It was concluded that this percephon would probably lead to a significant delay in blowdown or possibly the omission of blowdown when it was actually required. 

Light is the primary carrier of photosynthetic energy and also the initial producer of natural food colorants. To speak about the color of an object is to speak simultaneously about the illuminating light source, light transmitting medium, object properties, eye sensitivity, and conventions about color scales. Teleologically viewed, food color has two ambivalent main functions ... 

Keefer, Michael H. Agrippa s dilemma Hermetic rebirth and the ambivalences of "De vanitate" and "De occulta philosophia". Renaissance Q 41 (1988) 614-653. 

The decision to simply seek an answer to this question has caused a significant amount of controversy in the region and reflects the deep ambivalence many in the public continue to have about nuclear research specifically, and nuclear power in general. 

The ambivalent aptitude of sulfur [19] to stabilize adjacent anionic as well as cationic centers is a remarkable fact that has shown to be a reliable feature for the assembly of four-membered ring scaffolds utilizing cyclopropyl phenyl sulfides [20]. Witulski and coworkers treated the sulfide 1-69 with TsOH in wet benzene (Scheme 1.19) [21]. However, in addition to the expected cyclobutanone derivative 1-70, the bicyclo[3.2.0]heptane 1-70 was also obtained as a single diastereoisomer, but in moderate yield. Much better yields of 1-71 were obtained using ketone 1-72... 

A formal comparison between a system of grants or rewards and that of patents was presented recently by Shavell and Ypersele.22 In their article they present a review of the two systems and the theoretical positions of each of them. They state that under the system of grants, insofar as there would be no welfare loss as a result of monopoly prices, the only deviation from optimal allocation would be in relation to the incentive to invest in research. This incentive can be ambivalent. If the social or aggregate surplus is greater than the reward or grant there will be insufficient incentives, and vice versa. Either of these two possibilities may occur, as the optimal reward is equal to the expected surplus under different demand curves. 

The concept of zeolite action was tested in a particular reaction where the enzyme is exposed from the beginning to an acidic environment the esterification of geraniol with acetic acid catalyzed by Candida antarctica lipase B immobilized on zeolite NaA [219]. Lipases have been used for the hydrolysis of triglycerides and due to their ambivalent hydrophobic/hydrophilic properties they are effective biocatalysts for the hydrolysis of hydrophobic substrates [220]. When water-soluble lipases are used in organic media they have to be immobilized on solid supports in order to exhibit significant catalytic activity. 

The reaction mechanisms have been clarified in some detail7In method (a) a complex sequence starts with the acetoxy cyclopropenium ion 126 and the cyclo-propenyl acetate 127 and finally leads to adducts 128 containing two moles of arylmalononitrile, which were isolated and shown to be the preferential precursors of quinocyclopropenes. In method (b) the ambivalent arylmalononitrile anion102) is reversibly attacked at the benzylic position at low temperatures, whilst at higher temperature (after dissociation of 114) attack at the o- and p-positions of the... 

The family Cruciferae contains several economically important vegetables, such as broccoli, Brussels sprouts, cabbage, and cauliflower. There has always been some ambivalence about the use of these vegetables. While some of them have desirable, pungent flavors, cooking odors tend to deter their consumption. It is stated that cauliflowers are rarely purchased in France and there is a relatively low consumption of sauerkraut in the USA.55... 

Ambivalence about drug use is normal. True or False ... 

Reality Clients and patients are ambivalent about drug use and whether to change it. 

Many of the strategies discussed presume that a person has some awareness of a drug problem. But what can you do to motivate someone who has little awareness of a problem, or who may be very ambivalent about behavior change Do not despair, because there are strategies that may work with unaware or ambivalent clients, too. 

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