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Titlebook: Vorlesungen über Zahlentheorie; Heinz Lüneburg Book 1978 Springer Basel AG 1978 Arithmetik.Primfaktorzerlegung.Zahlentheorie.Zahlk?rper

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51#
發(fā)表于 2025-3-30 08:57:15 | 只看該作者
schon damit an, da? man den Malpunkt zwischen zwei Zahlen nicht als zwingenden Befehl auffa?t, die Multiplikation auch wirklich auszuführen. (Wer glaubt, so etwas brauche man nicht zu erw?hnen, der beobachte einmal, wie viele überflüssige Rechnungen Kinder machen, wenn sie Brüche addieren, multiplizieren ode978-3-7643-0932-9978-3-0348-5330-9
52#
發(fā)表于 2025-3-30 12:54:38 | 只看該作者
Heinz Lüneburgthe activities of micro-organisms are directed mainly towards the production of new cell material, these compounds represent the major end-products of microbial activity. If growth is to take place, biosynthetic raw materials and utilizable sources of energy must be present in the environment. This
53#
發(fā)表于 2025-3-30 19:41:07 | 只看該作者
Heinz Lüneburg hemicelluloses) and the three-dimensional, hydrophobic lignin. For the purpose of making papers, wood, either in the form of wood chips or sawmill residues, must first be reduced to pulps (discrete fibres) by a chemical or mechanical pulping process.. In chemical pulping, pulps are produced in a yi
54#
發(fā)表于 2025-3-30 21:37:35 | 只看該作者
55#
發(fā)表于 2025-3-31 01:43:26 | 只看該作者
Heinz Lüneburg involved in the induction of genetic changes in cells. Such analysis is also important for the assessment of risks to human health that may be associated with exposure to mutagens or other genetically active agents.. It is useful to distinguish . of dose-response relationships from mathematical mod
56#
發(fā)表于 2025-3-31 06:12:20 | 只看該作者
57#
發(fā)表于 2025-3-31 11:02:21 | 只看該作者
Heinz Lüneburgntal mutagenesis by a pure chemical agent was first achieved by Auerbach and Robson (1944, 1946) and a variety of such agents are now known. Their mechanisms of action appear to be fairly well understood as consisting of expressible heritable changes in the molecular structure of the genetic materia
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