Schmidt criterion

H.-L. Schmidt, M. Butzenlechner, A. RoBmann, S. Schwarz, H. Kexel, K. Kempe (1993) Inter-and intramolecular isotope correlations in organic compounds as a criterion for authenticity identification and origin assignment. Z. Lebensm. Unters. Forsch. 196. 105-110... 

Note that the Prandtl number has no effect on the initial region. The regularities of mass exchange are similar to those of heat exchange, except for that the criterion number is the Schmidt number Sc. 

Figure 2.1.16. Some prominent failures of the 4.2 A criterion of Schmidt s topochemistry .

Another useful criterion was proposed by Baldyga and Bourne (22) who found that engulfment controls mixing for not too elevated Schmidt numbers, i.e., for Sc < 4000. 

Borman, W. C. and Motowidlo, S. J. (1993). Expanding the criterion domain to include elements of contextual performance. In N. Schmidt and W. C. Borman (eds) Personnel Selection in Organizations. San Francisco, CA Jossey Bass. 

Use of an interview to select employees is common place. As such hundreds of studies have been conducted on various aspects of the employment interview process. It is now well established that using a structured employment interview process improves criterion-related validity (Schmidt and Hunter 1998). Furthermore, a number of very good papers have been published on the process of developing a structured employment interview (e.g., Barclay 2001 Campion et al. 1997 HuflFcutt 2011 Levashina et al. 2014). The research evidence is clear that developing and using a highly stractured interview process can help provide a valid and reliable measure of a job applicant s ability to perform a job. However, like all selection measures, an interview is more suited to the measurement of some competencies than others. 

We axe not concerned, here, however, with details of the crystal structures, it suffices to say that if the separation o the reacting c u bon atoms, C(l) and C(4 ), of Fig. 1, is less than 4A a solid state reaction is probable, in agreement with the criterion proposed by Schmidt. Nor do te want to discuss the restrictions that the requirement of cui unique polymerization direction places on the symmetry of monomer and polymer crystals. These topics are in the literature (5-7). Here we concentrate on the reaction kinetics of reactive monomers. 

A head-to-tail (HT) centro-symmetric relation was found between the monomers in the a-type polymorph that yields truxilic acid dimer. Whereas the P-type polymorph crystallizes with mirror symmetry, a head-to-head (HH) relation between the monomer molecules and on irradiation yields truxinic acid dimer. On the other hand, in the third y-form the repeat distance >4.2 A was found to be photostable. Schmidt postulated that the olefins should be aligned parallel with a distance <4.2 A between the olefinic bond pairs and the reaction should take place with minimum atomic movement. The maximum distance criterion proposed in Schmidt s postulate may be related to maximum distance for interaction between the orbital clouds that can be slightly larger than the sum of van der Waal s radii. ... 

Intensive studies concerning topochemical reactions have been reported on the photodimerization of cinnamic acid and its derivatives. Schmidt and co-workers proposed a geometrical criterion for the photodimerization in the crystalline state that the reacting double bonds should be situated within about 4.2 A of each other and aligned parallel. In the case of the photoactive single crystal of 1-n-octylthymine obtained from acetonitrile solution (Form III), however, the distance between the reacting double bonds of the thymine bases was 4.47 A. It is difficult to apply Schmidt s rule to the photodimerization of the 1-n-octylthymine crystals. Therefore, it is necessary to determine the feature within the crystal of 1-n-octylthymine for the photodimerization reaction in the crystaUine state. 

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