Stereoselectivity of 3C-Ugi reaction was originated from an attack of isocyanide to nonequivalent
re-face and/or si-face of asymmetrical iminium cation (8) (Scheme 3).
This research was conducted utilizing a quasi-experimental nonequivalent
group comparison design, which involves exposure of non-equivalent groups to an event and then following up with a post-test (Shadish, Cook, & Campbell, 2002).
The adjusted model did improve internal validity by accounting for issues of selection due to nonequivalent
groups at pretest.
Quantitative approach with quasi-experimental, nonequivalent
control group, pretest post-test design was used to assess the effectiveness of structured teaching programme (STP) on knowledge of practice regarding perineal care.
Only those candidates are being called for interviews whose degrees are mentioned in the job description in the .They said it was condemnable that first candidates had been allowed to take entry tests and later on they were told that their degrees were nonequivalent
to the degrees mentioned in the job ad.
The HF forces were obtained by displacing the symmetry nonequivalent
Ti and B atoms from their equilibrium positions by [+ or -] 0.02 [Angstrom] in the supercells containing 64 atoms (TiB), 92 atoms (Ti[B.sub.2]), and 112 atoms ([Ti.sub.3][B.sub.4]).
The fractional coordinates of the three nonequivalent
Fe atoms are (0, 0, 0), (0, 0, 0.5), and (0.333, 0.667, 0.78).
There are plenty of nonequivalent
representations of relations (2) when the number of degrees of freedom is infinite.
The top three most common 510(k) deficiencies include: nonequivalent
preclinical testing results as compared to the predicate device (your device is not as strong as the predicate device); discrepancies in the device description, parts listing and/or engineering drawings; and sterility and cleaning issues.
groups with anchor test design, also known as common-item nonequivalent
groups design was used (de Ayala, 2009; Kolen & Brennan, 2014).
[The design standards for both regression discontinuity designs and single-case designs are still under review and are considered pilots (What Works Clearinghouse, 2014).] Quasi-experimental designs that can establish causal validity include nonequivalent
groups with multiple pretests, single-factor within-subject designs, and single-case designs, all described below.
Nevertheless, researchers may have adequate subject-matter knowledge to be able to identify outcomes that are not expected to change in response to the intervention of interest, which have been referred to as control outcomes or nonequivalent