Ponderal effect

In the case of p,p -BVPDPC, there was no increased absorption at 270 nm probably due to steric effects associated with a large molecule (ponderal effect) and to increased aplanarity of the styrylpyridine ring to suppress the dimerization and isomerization of the double bond preventing cis-isomer formation. 

Finally, pollutiou-preveutiou measures can provide a company with the opportunity of looking their neighbors in the eye and truthfully saying that all that can reasonably Be done to prevent pollution is being done. In effect, the company is doing right by the environment. Is there an economic advantage to this It is not only a difficult question to answer quantitatively but also a difficult one to answer quahta-tively. The reader is left to ponder the answer to this question. 

So much for theory The interesting thing is to ponder what went contrary to expectations, and to try to find explanations. It is here that graphical presentations are helpful to judge the plausibility of any effect A correlation, is only a correlation, and can come about because of a single point that bucks the trend. 

We are all familiar with forces between bodies on a macroscopic scale. If one sits at their desk on earth pondering the view and inadvertently lets go of their lunch sandwich it falls until it lands on your manuscript, your lap or the floor—right Better yet, a cannonball and a softball fall at the same rate. It is the definition of gravity . Long after the Tower of Pisa experiments, we discovered why the moon is in seemingly stable orbit around the earth and the earth around the sun is related to forces between bodies. We are also familiar with electrostatic forces and their effects. Dust from the air in the room is attracted to the screen of everyone s TV because of the electrostatic charge it develops. It would seem reasonable that attraction occurs on a smaller scale and even on a molecular scale that does not involve energies on the order of true chemical bonds. 

You may find some discrepancies while trying to interpret the values of amines on the basis of +1 or -1 effect of the substituents present in amines. Besides inductive effect, there are other effects like solvation effect, sterlc hlnderance, etc., which affect the basic strength of amines. Just ponder over. You may get the answer In the following paragraphs. 

The possible existence of Huxley s mysterious, timeless regions of reality has led professional and amateur researchers to ponder the extraordinary effects of the DMT molecule (N,N-Dimethyltryptamine). DMT is a psychoactive chemical that causes intense visions and coaxes users to quickly enter a completely different world that some have likened to an alien or parallel universe. DMT is a chemical produced in our own bodies and by many plants. Daniel Pinchbeck in Breaking Open the Head says, smoking DMT is like being shot from a cannon into another dimension and returning to this world in less than ten minutes. The transition from our world to the DMT universe ( DMTverse ) oc-... 

However, in many electrochemical situations (e.g., methanol oxidation), the question is one of what entities and how many of them are present on the surface when a certain potential is applied to the electrode, while the solvent layer is still adsorbed on the electrode. One has to ponder the effect of removing the electric potential that orients the reactants on the electrode and the solvent (this happens when one applies a vacuum) and ask Is the information that can now be extracted from the surface (i.e., in ex situ measurements) still relevant to what is wanted—information on entities present during the electrochemical reaction, which must necessarily involve a certain potential applied across the reactants, in the presence of the solvent ... 

Yet science is more than a body of knowledge. Science is a method by which we can explore our natural environment and effectively discover its secrets. Consider, for example, a scientist who is puzzled by an observation that arises in the course of her daily work. She ponders the bizarre observation in light of what she already knows. After some struggle, which includes opening her mind to a myriad of possibilities, she makes a creative, imaginative leap and is struck by a new idea. If this new idea were true, she realizes, it would explain the bizarre observation. It would also give her insight into areas she has yet to explore. 

A common alternative is to synthesize approximate state functions by linear combination of algebraic forms that resemble hydrogenic wave functions. Another strategy is to solve one-particle problems on assuming model potentials parametrically related to molecular size. This approach, known as free-electron simulation, is widely used in solid-state and semiconductor physics. It is the quantum-mechanical extension of the classic (1900) Drude model that pictures a metal as a regular array of cations, immersed in a sea of electrons. Another way to deal with problems of chemical interaction is to describe them as quantum effects, presumably too subtle for the ininitiated to ponder. Two prime examples are, the so-called dispersion interaction that explains van der Waals attraction, and Born repulsion, assumed to occur in ionic crystals. Most chemists are in fact sufficiently intimidated by such claims to consider the problem solved, although not understood. 

Burk, D. In colloquial consideration of the Pasteur and neo-Pasteur effects. Ponder, E., Ed. The Darwin Press, New Bedford, MA Cold Spring HarW Symposia on Quantitative Biology Cold Spring Harbor, NY 1939 pp. 420-459. 

It may therefore be said, that the affinity of the different acids for an alkaline base, is in the inverse ratio of the ponderable quantity of each of them which is necessary to neutralize an equal quantity of the same alkaline base but by proportioning the quantities to the affinity, they produce the same effect so that the force put in action depends on the affinity and on the quantity, and one can supply the place of the other. 

Just as one can consider the effects of dimerization upon the frequencies or intensities of the monomer modes, it is useful to ponder how juxtaposing two dimers within a trimer affects the vibrational spectra of the dimer. Kofranek et al. provided such information, reported in Table 5.4, which suggests that the SCF data graphed in Fig. 5.4 are quite representative of the correlated level as well. All of the trends in the SCF frequencies are mirrored in the CPF data. The similarity of the last two columns in the table indicates no major perturbations of the intermolecular band intensifications caused by electron correlation. 

Relative non-re ponder only display a good immune response after an additional 4 , 5 or 6 injection. In alcoholics, a double vaccine dose is more effective. (238) Care must be taken to ensure that the ampoule is well shaken and the injection correctly placed (i.m.) in the... 

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