He + ,- states

In 1965 he stated, On the other hand, the norbornyl cation does not possess sufficient electrons to provide a pair for all of the bonds required by the proposed bridged structures. One must propose a new bonding concept, not yet established in carbon structures (emphasis added). 

Ludwig discusses new work by the A.I.Ch.E. which has produced a method more detailed than the previous shortcut methods. He states that some of the shortcut methods can be off by 15-50% as indicated by the A.I.Ch.E. work. The spread of the Drickamer and Bradford correlation shown in the Ludwig plot is about 10 points of efficiency or 5 efficiency points around the curve. Ludwig states that comparisons between shortcut and A.I.Ch.E. values indicate that deviations for the shortcut methods are usually on the safe or low side. 

The last of these bodies announced as being alcoholic constituents of rose and geranium oils was reuniol, found in various geranium oils (BAunion, African, and Spanish) by A. Hesse. This had previously been announced as a probable chemical individual by Barbier, but he stated that he had not obtained it pure. Erdmann and Huth claimed that it was more or less pure rhodinol. 

After Kamerlingh Onnes was appointed professor in experimental physics at the University of Leiden in 1882, he stated in his inaugural lecture that physics is capable of improving the well-being of society and proclaimed that this should be accomplished primari-... 

Korbo nits(Ref 1), commenting on a spontaneous ignition in a molasses tank, recommended that excessive foaming be avoided. He stated that molasses should be poured slowly into tanks, stirring must be done slowly, and manholes should be left open until the molasses is cooled... 

Details on commercial production of NS are scarce. Davis (Ref 17) describes a mixed acid consisting of 38% HN03 and 62% H2S04, with a 4 to 1 acid-to-starch ratio, and a nitration temp of 38—40°. He states that after nitration the contents are drowned in water and the NS is separated by filtration... 

The reviews by Rondestvedt (1960, 1976) are outdated so far as the mechanism of the Meerwein reaction is concerned. This statement is substantiated by Rondestvedt s own comment in his 1976 review (p. 226) in which he states that the generally accepted mechanism involves the aryl radical. .., though the manner of its formation and its subsequent reaction are still controversial . Meerwein et al., in their original paper (1939), expressed the opinion that the reaction is ionic in nature. A radical mechanism was first proposed by Koelsch in 1943 (see also Koelsch and Bockelheide, 1944). He received immediate support from Bergmann et al. (1944) and Bergmann and Weizmann (1944), in spite of the fact that Koelsch s claim was based on rather uncertain and vague arguments. 

Goldschmidt predicted from his empirical rule that calcium chloride would not have the fluorite structure, and he states that on investigation he has actually found it not to crystallize in the cubic system. Our theoretical deduction of the transition radius ratio allows us to predict that of the halides of magnesium, calcium, strontium and barium only calcium fluoride, strontium fluoride and chloride, and barium fluoride, chloride,... 

The author is aware that there is a difficulty here, for he states that this result from (102) may be due to some accidental arrangement of atoms however, it is not possible with any arrangement of atoms in his unit to explain the observed reflection. The analogy suggested to (100) of succinic acid and (010) of succinic anhydride [Yardley, Proc. Roy. Soc., 105A, 451 (1924)] is not pertinent, for in these cases dajod- is twice d/ 0b -> not one-half of it. 

In contrast, substitution of oxygen for —NH— in open-chain compounds causes a great decrease in activity. He states that the heterocyclic ring of D-24 locks the carbomethoxy group at the active site and thus accomplishes the same amount of restriction as does binding of both the aromatic and acylamido groups of the open-chain analogs (82). 

As we saw in the previous section, Markovnikov s rule tells us to place the H on the less substituted carbon, and to place the X on the more substituted carbon. The rule is named after Vladimir Markovnikov, a Russian chemist, who first showed the regiochemical preference of HBr additions to alkenes. When Markovnikov recognized this pattern in the late 19th century, he stated the rule in terms of the placement of the proton (specifically, that the proton will end up on the less substituted carbon atom). Now that we understand the reason for the regiochemical preference (carbocation stability), we can state Markovnikov s rule in a way that more accurately reflects the underlying principle The regiochemistry will be determined by the preference for the reaction to proceed via the more stable carbocation intermediate. 

In his recapitulation Franckenberg enquires as to the nature of the medicine of the wise. Answering himself, he states that it is nothing other than water, powder, or plaster derived from nature, or found by human wit. This water springs from God s Spirit, the Ruach Elohim and operates through God s Word, the name of Jesus, to heal human illness. It is also a balsam, or oil. 

Kier and Hall noticed that the quantity (S -S) jn, where n is the principal quantum number and 5 is computed with Eq. (2), correlates with the Mulliken-Jaffe electronegativities [19, 20]. This correlation suggested an application of the valence delta index to the computation of the electronic state of an atom. The index (5 -5)/n defines the Kier-Hall electronegativity KHE and it is used also to define the hydrogen E-state (HE-state) index. 

The Kier-Hall electronegativity is used to define the HE-state index HS [19] ... 

The HlV-1 protease is responsible for processing the protein precursors to the enzymes (integrase, protease and reverse transcriptase) and the structural proteins of the HIV-1 virus. Maw and Hall found that topological indices provide rehable QSAR models for the IC50 data of 32 HIV-1 protease inhibitors [29]. The best QSAR model, with r = 0.86, s=0.60 and q = 0.79, was obtained with the shape index Ka, the connechvity index the sum of HE-state indices for ah groups that act as... 

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