Physical Sciences and Mathematics Commons^™

Otoe County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

No abstract provided.

Resource Notes-Academic Year 1988-89

Conservation and Survey Division

No abstract provided.

Nebraska Mineral Operations Review, 1988, Raymond R. Burchett, Duane A. Eversoll

Conservation and Survey Division

No abstract provided.

Effects Of Track Structure On Neutron Microdosimetry And Nanodosimetry, Randall S. Caswell

United States Department of Commerce: Staff Publications

The process by which neutrons transfer their energy to tissue is described, including the deposition of energy by secondary charged particle tracks in small sites; that is, microdosimetry and nanodosimetry. Three approximations are considered in order of increasing amounts of information on track structure: the continuous slowing-down approximation (CSDA), the straggling approximation, and the delta-ray approximation. Although simple approximations sometimes work quite well, much work remains to be done for very small sites, and for the inclusion of the effects of "passers" in the calculations.

Die Erste Promotion B Eines Mongolischen Tierarztes Und Parasitologen Auf Dem Gebiete Der Veterinärmedizin In Der Ddr, H. Splisteser

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

First paragraph:

Am 19. 9. 1986 verteidigte .der Kandidat der Veterinärwissenschaften Munchdorshin DASH, Vorsitzender des Komitees für Wissenschaft und Technik beim Ministerrat der MVR und Mitarbeiter im Bereich Parasitologie des Forschungsinstitutes für Tierproduktion und Veterinärmedizin des Ministeriums für Landwirtschaft der MVR vor einer Prüfungskommission der Akademie der Landwirtschaftswissenschaften der DDR (Vorsitz: Prof. Dr. P. RYBKA) seine Dissertationsschrift zum Thema "Schildzecken und Ma/jnahmen ihrer Bekämpfung in der MVR" mit Erfolg. Gutachter waren: Prof. Ur. Dr. h. c. TH. HIEPE, Prof. Dr. REGINE RIBBECK und Dr. sc. H. SPLISTESER.

Einige Ergebnisse Zur Erforschung Der Dipteren (Insecta) Der Mongolischen Volksrepublik, E. P. Nartshuk

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

в результате интенсивных экспедиционных работ энтомологов разных стран (Венгрия, Г ДР, Польша, СССР, Чехословакия) в содружестве со специалистами МНР за последние 20 лет были собраны на территории Монголии огромные коллекции двукрылых: 86,5 тыс. экз. венгерским ученым З. Касабом, более 120 тыс. советскими, более 10 тыс. чехословацкими исследователями и т . д. Обработка столь обширных материалов проводится при широкой международной кооперации ученых многих стран и к настоящему времени число специальных публикаций по двукрылым МНР приближается к 200. Незакончена полностью обработка материалов ни одной из экспедиций. Публикация материалов 6 экспедиций З. Касаба близка к завершенv.ю: ПО 59 семействам двукрылых обработан и опубликован …

Loss Of Biological Diversity: A Global Crisis Requiring International Solutions: A Report To The National Science Board, Craig Call Black, Perry L. Adkisson, Gardner Mallard Brown, Rita Rossi Colwell, Charles E. Hess, James B. Holderman, K. June Lindstedt-Siva, William A. Nierenberg, Peter Hamilton Raven, Theodore M. Smith, Edward O. Wilson, W. Franklin Harris

Harold W. Manter Laboratory: Library Materials

Executive Summary

Biological diversity refers to the variety and variability among living organisms and the ecological complexes in which they occur. Diversity can be defined as the number of different items and their relative frequency. For biological diversity, these items are organized at many levels, ranging from complete ecosystems to the chemical structures that are the molecular basis of heredity. Thus, the term encompasses different ecosystems, species, genes, and their relative abundance (OTA, 1987).

There is an ongoing, unprecedented loss of the variety as well as absolute numbers of organisms-from the smallest microorganism to the largest and most spectacular of …

Plio-Pleistocene Glacial Deposits In Northeastern Nebraska: New Exposures And Interpretations, Michael R. Voorhies, R. G. Goodwin

School of Natural Resources: Faculty Publications

Recent interpretation of oxygen isotopic data for benthic and planktonic foraminifera recovered during ocean drilling programs suggest that world ice volume was greater than the ice volume of 18 thousand years ago (Late Wisconsinan) approximately 2.5 million years ago (Prentice and Matthews, Geology, November, 1988). This agrees well With biostratigraphic and paleoecologic interepretations drawn from sediment cores obtained from the Arctic Ocean Basin. The latter data suggest complete ice cover of the basin during the period 2.2-2.4 million years ago (Scott et at., G.S.A. Bulletin, February, 1989).