Hausens Contributions

Hausen (75) has written an excellent review of the adenocarcinoma of the nasopharynx in woodworkers. He introduces the subject by the original work of MacBeth (105) showing increased incidence of it in furniture workers in England. He quotes 32 other surveys on the excess occurrence of this carcinoma (mostly in European countries) and six or seven other surveys that did not find such an association. Some data on fine dust in other industries also suggests an increased 

Later reviews have been equally instructive. Recently, Hausen (76) has again reviewed the above work. At least six theories have been put forward regarding etiological factors. In his opinion, the most interesting hypothesis is that the nasal cancer is caused by oxidation of degradation products from lignin, formation of quinones, absorption on various tissue sites, and eventual formation of cancer at the sites. 

The word tannin is used historically, for chemically it is incorrect. Hergert believes that the word tannin should be reserved for substances used in the production of leather however, the word has been used extensively in a context that means any brown solution of astringent taste. The mixture of correct and incorrect usages must be followed in this section for two reasons First, the tannins (correct usage) are found ubiquitously in softwoods, hardwoods, barks, and roots second, there is a considerable body of research on the effects of tannins (both usages) on humans. 

In particular, Morton correlated adverse effects with the flowering of several species of trees such as the mango, the Brazilian pepper tree, the cajeput tree, and others. She has collected all these data into a book (120, 125, 126). 

Kapadia et al. (91) have discussed the relationship between herbal tea consumption and cancer. They began with a review of the most common tea, that from the leaves of Camellia sinensis. Tea from other plants such as Ilex paraguaiensis (mate), and other lesser known teas (such as those from /. varitoria, Eupatorium triplinerve, and Sassafras albidium) were discussed. The resurgence of herbal teas used for medicinal purposes, which are available in health food stores and are used in areas high in risk for esophageal cancer, may be implicated. They concluded that consumption, in moderation, of ordinary tea (especially with milk) is relatively safe. Other teas that are tannin-rich and other products may be causes of increased esophageal cancer. 

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The above picture of water/oxide interface does not obviously show the simultaneous, primary and secondary adsorption on non-dissociated water molecules. In their review, Etzler and Drost-Hausen wrote [89] Furthermore, as mentioned elsewhere in this paper (and other papers by the present author and associates), it is obvious that vicinal water is essentially unaffected by electrical double layers . Several properties of the vicinal water appear to be similar for various solid surfaces characterized by various point of zero charge (PZC) values (the paradoxical effect ). It is therefore to be expected that the contribution to the changes of the heat of immersion with changing pH, produced by the secondarily adsorbed vicinal water, is negligible. 

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