N Paramecium aurelia a number of factors interact to determine the I occurrence of conjugation. Most attention has in the past been given to the role of environmental conditions. In this paper an internal factor is dealt with: nuclear reorganization of the type occurring both a t endomixis and a t conjugation. As will be shown, the relation of these nuclear processes to the subsequent occurrenc...

From time to time I have the opportunity to give lectures on topics related to aromaticity. Quite often in these occasions I get comments from the audience complaining about the fact that aromaticity is not a well-defined concept. My usual answer is that the most fruitful concepts in chemistry share the same lack of strict definition (Grunenberg, 2017). In one of these occasions, the comment wa...

When R is a commutative ring, matrices A and B in Mn(R) are called conjugate when UAU−1 = B for some U ∈ GLn(R). The conjugacy problem in Mn(R) is: decide when two matrices in Mn(R) are conjugate. We want to look at the conjugacy problem in Mn(Z), where ideal theory and class groups make an interesting appearance. The most basic invariant for conjugacy classes of matrices is the characteristic ...

Practice these exercises until you can produce the meanings in either direction effortlessly and instantaneously. Recommendation: To make the best use of your time, do not just mechanically write down the list of words, but speak them aloud and try to think of a visual representation of the meaning as you write. Test yourself by covering the other columns or by folding the paper so that only a ...

Strong electrostatic interaction between metallo-supramolecular polymers and DNA was confirmed by UV-vis and CD spectral measurements during titration, and cyclic voltammetry. The stable conjugation structure based on groove binding was revealed by using QM/MM computational methodology and supported by AFM.