ISOTOPIC COMPOSITIONS OF BISMUTH,LEAD, THALLIUM,AND MERCURY FROM MINI r-PROCESSING

The yields of stable isotopes of Bi, Pb, Tl and Hg as well as yields of ²⁰⁵Pb are calculated with a parameterized model for “mini r-processing” in the Ne, O, C-rich zones of explosive burning in massive stars. The Pb isotopic compositions stand out by their comparatively low ²⁰⁷Pb yields and by the fact that this r-process variant yields ²⁰⁴Pb quite abundantly. The average ²⁰⁵Pb/²⁰⁴Pb yield ratio of 6.1 is the same order of magnitude as yield ratios deduced for s-processing. The Hg from this mini r-process looks like normal solar-system mercury, but with ¹⁹⁶Hg missing and the light s-isotopes A = 198, 199, 200 and 201 depleted (especially the odd-A species).     

Comment on the Bianchi type-V solution in the scale-covariant theory

We make some critical remarks on the recent papers by Beesham (1986a-c) concerning exact solutions of the scale-covariant theory.     

The lunar theory of Hill and Brown

Hill and Brown solved the equations of motions of the Moon with the help of multiple Fourier series. We describe their method and show how it can be adapted, so that all work can be carried out by a computer with the help of an algebraic processor called POLYPAK.Proceedings of the Sixth Conference on Mathematical Methods in Celestial Mechanics held at Oberwolfach (West Germany) from 14 to 19 August, 1978.This research was partially supported under the National Science Foundation grant MCS 78-01425.     

Correlation of Tectono-Stratigraphic Units in Northern Thailand with Those of Western Yunnan (China)

Ｔｈｅｃｏｒｒｅｌａｔｉｏｎｏｆｔｅｃｔｏｎｏ ｓｔｒａｔｉｇｒａｐｈｉｃｕｎｉｔｓｏｆＮｏｒｔｈｅｒｎＴｈａｉｌａｎｄｗｉｔｈｔｈｏｓｅｏｆＷｅｓｔｅｒｎＹｕｎｎａｎ (Ｃｈｉｎａ)ｉｓｓｔｉｌｌｌｉｔｔｌｅｕｎｄｅｒｓｔｏｏｄ ,ｐａｒｔｌｙｂｅｃａｕｓｅｏｆｔｈｅ ｐａｕｃｉｔｙｏｆｇｅｏｌｏｇｉｃａｌｄａｔａｆｒｏｍｔｈｅＵｎｉｏｎｏｆＭｙａｎｍａｒａｎｄｔｈｅＬａｏｓ,ａｎｄｐａｒｔｌｙｄｕｅｔｏｔｈｅｃｏｎｆｌｉｃｔｉｎｇｇｅｏｄｙｎａｍｉｃｃｏｎｃｅｐｔｓａｄｏｐｔｅｄｂｙｖａｒｉｏｕｓａ…     

Erhöhte Konzentration der anorganischen Stickstoffverbindungen in der Deutschen Bucht im niederschlagsreichen Sommer 1987

Zusammenfassung Der starke Süßwassereintrag im Sommer 1987 führte in der Deutschen Bucht zu erhöhten Konzentrationen der anorganischen Stickstoffverbindungen. Keine Konzentrationserhöhung gegenüber den Sommer 1986 zeigte sich beim anorganischen gelösten Phosphat. Wie die im Vergleich zu normalen Sommern in Oberflächennähe hohen Nährstoffkonzentrationen und niedrigen pH-Werte zeigen, führte das erhöhte Nährstoffangebot nicht zu einer verstärkten Primäproduktion. Dies und eine wetterbedingte stärkere Wasserdurchmischung verhinderten ungünstige Auswirkungen auf den Sauerstoffhaushalt in der Deutschen Bucht.

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Increased concentrations of the inorganic nitrogen compounds in the German Bight during the rainy summer 1987

Summary Due to the strong freshwater input during spring and summer 1987, increased concentrations of inorganic nitrogen were measured in the German Bight. Compared to 1986, no change was found in the concentration of dissolved inorganic phosphate. Relatively high nutrient concentrations and low pH values in the upper water layer indicate, that the increased nutrient supply was not utilized for primary production. Therefore, and due to a weak stratification no oxygen deficiency occured in the German Bight.