Experiments on this subject

Highly stereospecific catalysts for the polymerization of these monomers were found quite naturally along two lines of search starting from the triethylaluminum-water and triethylaluminum-alcohol catalyst systems, which were known to be stereospecific polymerization catalysts for these monomers when we started the experiments on this subject. Development and interrelation of these catalysts in our research are shown in Scheme 1 (8). 

Visit www.the-abc-of-mcs.com under Breath or see Part VI Further Resources for more information on companies that sell MCS masks and other systems. If you d like to exchange experiences on this subject with fellow patients, become a member of an online forum (see entry... 

The manufacture of these substances was carried out by the formate method or the chloroformate method, as mentioned on p. 99. The method of chlorination in each of these is similar and requires a suitable source of light. Many experiments on this subject have indicated that the Osram watt arc lamp and the mercury vapour lamp are suitable light sources, and the... 

For testing nutrition by means of simple amino-adds described above, we have utilized a very complex mixture which greatly resembles the natural products of the hydrolysis of peptones. Most of the substances entering into this mixture have been studied separately, espedally from the point of view of the influence which each may exert on the assimilation of the whole. It has been attempted experimentally to see whether all the products of hydrolysis are indispensable, or whether they can be replaced by each other. Although these tests are very delicate and are diflflcult to perform, they have nevertheless given definite results. Glycin appears to play an entirely secondary part and another add can be substituted for it. On the contrary, tryptophane appears to be a substance that is absolutely necessary. The following is an experiment on this subject ... 

The results obtained by the use of direct currents were much more satisfactory than the above. We are indebted to Renard, Almeida and Dehdrain, Jaillard, and Habermann for the most thorough experiments on this subject. 

Skin Wounds. It seems well established that there is a delay in the healing of skin wounds in vitamin C deficiency. The first experiment on this subject was carried out by Ishido in 1923. Although he found considerable delay in the healing of wounds, he found also that, even if the animal remained scorbutic, eventually the wounds would heal. Further discussion of this question appears later. 

When the cap has a large diameter it can be regarded as hemispherical but when it is very small, it is extremely sagging experiment on this subject. 214... 

Most polymer processing methods involve heating and cooling of the polymer melt. So far the effect of the surroundings on the melt has been assumed to be small and experience in the situations analysed has proved this to be a reasonable assumption. However, in most polymer flow studies it is preferable to consider the effect of heat transfer between the melt and its surroundings. It is not proposed to do a detailed analysis of heat transfer techniques here, since these are dealt with in many standard texts on this subject. Instead some simple methods which may be used for heat flow calculations involving plastics are demonstrated. 

Expert opinion is a source, frequently elicited by survey, that is used to obtain information where no or few data are available. For example, in our experience with a multicountry evaluation of health care resource utilization in atrial fibrillation, very few country-specific published data were available on this subject. Thus the decision-analytic model was supplemented with data from a physician expert panel survey to determine initial management approach (rate control vs. cardioversion) first-, second-, and third-line agents doses and durations of therapy type and frequency of studies that would be performed to initiate and monitor therapy type and frequency of adverse events, by body system and the resources used to manage them place of treatment and adverse consequences of lack of atrial fibrillation control and cost of these consequences, for example, stroke, congestive heart failure. This method may also be used in testing the robustness of the analysis [30]. 

Check experiments with pre-formed terminally-unsaturated polyisobutenes of low and high DP, and with saturated hydrocarbons, gave results supporting our conclusions that the AlX+2 reacts only with double bonds to give Al-C bonds. Thus the supposition 2 is now supported at least qualitatively by direct experimental results, but the exact quantitative correlations remain to be established. A Short Communication on this subject will be submitted shortly to Makromolecular Chemistry. 

Either Transwell inserts or side-by-side diffusion chambers can be used for transport studies. Bode et al. have provided an excellent review on this subject [60], Briefly, cells are incubated for 30-60 min with a buffer solution. To initiate the transport study, a transport buffer containing the drug under investigation is added to either the apical or the basal chamber depending on the transport direction of interest. At predetermined time points, the respective receiver chamber is sampled and the withdrawn volume is replaced with the same volume of fresh buffer. The permeability coefficient (Papp) is calculated and the ratio of /apP in the basolateral-to-apical direction versus that in the apical-to-basolateral direction gives the efflux ratio. These sort of transport experiments are well suited to determine if drugs/xenobiotics are substrates of the placental efflux proteins. 

As one can see from Table IV.2, these calculated frequencies decrease in the sequence of the furazans E-, Z-I, II. It is stated (96ZOK1742) that these data show that isomerization can take place from E- to Z-I. The degenerate ring transformation of Z-I into II is also predicted by these frequency data, which are in agreement with the experiment. For a further discussion on this subject one is referred to the original literature and the references cited therein. 

The Office of Naval Research, Propulsion Program, has funded much of the work on partially premixed flames at Purdue University. The National Science Foundation, the National Aeronautics and Space Administration, and the Purdue Research Foundation have also supported some of the work at Purdue on this subject. Mr. Jong Mook Lim, who is supported by Hyundai Heavy Industries, completed the experiments and the computations. The author acknowledges many useful interactions with Linda Blevins, Kent Lyle, B. J. Alder, Norm Lau-rendeau, Tadao Takeno, and Steve Frankel. 

It is this authors opinion, that ion and electron enhanced chemical reactions of the type described above are probably important in MOST situations. Nevertheless, to our knowledge, neither a theoretical understanding nor well defined experiments have been reported on this subject. Therefore, several experiments which have been performed recently in this laboratory will be described and then possible explanations for the ion-enhanced, chemical reactions will be discussed. 

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