Today when we think of domestic cats, we recall the familiar hearthside companion and the mischievous playmate. It is difficult to comprehend that in the past the animal has played a fundamental role in the development of European and Western civilization. The human relationship to the cat has been important for most of the last four millennia.
In this beautifully illustrated book, Donald Engels charts the history and significance of the cat from ancient Egypt to the middle ages, exploring such phenomena as the worship of the Egyptian cat goddess Bastet, the infamous cat massacres and witch hunts of the thirteenth century, and the role of the cat in combating disease and starvation. Classical Cats presents a unique and entertaining view of the vicissitudes of the cat in history.

Evolution of Castes in Insects l BERNHARD RENSCH The evolution of organisms in the succession of generations has been primarilly achieved through the appearance of new hereditary variants with minor deviations along with the development of stable structures and functions. Harmful mutants were eradicated either immediately or in the subsequent generations through the process of natural selection while unharmful or advantageous ones usually survived. As this process continued, many new races and species developed which possessed structures and functions of a rational nature and which became increasingly independent from their environment. These evolutionary tendencies were also promoted through either geographical, ecological, physiological or genetical isolation of populations. In some phylogenetic lines, there occurred an increase in the number of cells due to additional cellular divisions in the morphogenesis of structures. This opened up the possibility for the development of the division of labour within cellular groups leading to more complicated and consequently more successful functions of tissues and organs. A further advancement in the adaptation of a species to its environment was made possible through specialization for certain functions of whole individuals or groups of individuals.

Analytical methods are the essential enabling tools of the modern biosciences. This book presents a comprehensive introduction into these analytical methods, including their physical and chemical backgrounds, as well as a discussion of the strengths and weakness of each method. It covers all major techniques for the determination and experimental analysis of biological macromolecules, including proteins, carbohydrates, lipids and nucleic acids. The presentation includes frequent cross-references in order to highlight the many connections between different techniques. The book provides a bird's eye view of the entire subject and enables the reader to select the most appropriate method for any given bioanalytical challenge. This makes the book a handy resource for students and researchers in setting up and evaluating experimental research. The depth of the analysis and the comprehensive nature of the coverage mean that there is also a great deal of new material, even for experienced experimentalists. The following techniques are covered in detail: - Purification and determination of proteins - Measuring enzymatic activity - Microcalorimetry - Immunoassays, affinity chromatography and other immunological methods - Cross-linking, cleavage, and chemical modification of proteins - Light microscopy, electron microscopy and atomic force microscopy - Chromatographic and electrophoretic techniques - Protein sequence and composition analysis - Mass spectrometry methods - Measuring protein-protein interactions - Biosensors - NMR and EPR of biomolecules - Electron microscopy and X-ray structure analysis - Carbohydrate and lipid analysis - Analysis of posttranslational modifications - Isolation and determination of nucleic acids - DNA hybridization techniques - Polymerase chain reaction techniques - Protein sequence and composition analysis - DNA sequence and epigenetic modification analysis - Analysis of protein-nucleic acid interactions - Analysis of sequence data - Proteomics, metabolomics, peptidomics and toponomics - Chemical biology

"The most important work on Alexander the Great to appear in a long time. Neither scholarship nor semi-fictional biography will ever be the same again. . . .Engels at last uses all the archaeological work done in Asia in the past generation and makes it accessible. . . . Careful analyses of terrain, climate, and supply requirements are throughout combined in a masterly fashion to help account for Alexander's strategic decision in the light of the options open to him...The chief merit of this splendid book is perhaps the way in which it brings an ancient army to life, as it really was and moved: the hours it took for simple operations of washing and cooking and feeding animals; the train of noncombatants moving with the army. . . . this is a book that will set the reader thinking. There are not many books on Alexander the Great that do."--"New York Review of Books"

Spurenfossilien sind im Grenzgebiet von Geologie und Biologie angesiedelt. Die Reaktion der Organismen auf aussere Veranderungen bestimmt ihr Verhalten. Spuren dieses Verhaltens finden sich in fossilen Sedimenten und konnen somit zur Interpretation der ursprunglichen Umwelt herangezogen werden. Das Buch besteht aus zwei Teilen: Neoichnologie und Palaeoichnologie. Es enthalt zahlreiche instruktive Zeichnungen, die speziell fur dieses Buch angefertigt wurden. Ein ausfuhrliches Glossary erleichtert den Einstieg in das Gebiet. Das Buch ist gedacht fur Studenten und Wissenschaftler der Sedimentologie und Palaontologie.

Vorliegende Arbeit soll der Aufgabe gerecht werden, das Gebiet der Aufbereitung von Feuerungsruckstanden einer wissenschaftlichen Betrachtung zu unterziehen, nachdem in der Zeitschriftenliteratur eine groBe Zahl von verstreuten Aufsatzen erschienen ist, die den genannteri Gegenstand in keiner Weise objektiv wurdigen. Die vergangenen Jahre der Brennstoffarmut haben fur die Frage der Aufbereitung' von Feuerungsriickstanden einen raschen Aufschwung gebracht, der jetzt wieder im Abklingen ist. In Wirklichkeit stehen wir am Anfang einer Entwicklung. Diese Zusammenhange sollen geklart, ihr AnschluB an die ubrigen Aufgaben einer rationellen Warmewirtschaft gefunden werden. lch mi:: ichte nicht verfehlen, an dieser Stelle den verschiedenen Mas chi n e n fa b r ike n fur ihr Entgegenkommen bei der Beschaffung von Unterlagen, sowie den verschiedenen Warmestellen fur die Ubermittlung von VersuC'hsergebnissen zu danken, wobei ich Herrn Oberingenieur Dr. lug. e. h. O. Ullrich, Magdeburg, und Herrn Oberingenieur Richter, Kattowitz, hervorheben mi:: ichte. Besonders bin ich weiter noch Herrn cando ing. K. Schimz verpflichtet, der mir bei der Materialbeschaffung und der Drucklegung des Manuskriptes behilflich war. Berlin-Lichterfelde, im R bruar 1925. Walther Engel. Inhaltsverzeichnis. Seite Einlei tung ., . . 1 I. Die Verfahren 7. ur Aufbereitung von Feuerungsrii- standen . . . . . . . 4 1. Allgemeine Ausfiihrungen und die Handsetzmaschine nach PiRtsch, Bamag, Eitle u. a. . . . . . . . . . . . 4 2. Das magnetische Verfahreu nach Krupp . 7 3. Das Verfahren nach Schilde . . . . . . 17 4. Das Verfahren nach' Weber. . . . . . 24 5. Das Setzverfahreu nach Meguin, Humboldt, Groppel-Rheinmetall u. a. . . . . . . . . . . . . . . 28 6. Das Verfahren nach Eukonomos. . 3,1 7. Die Handauslese . . . . . . . . 36 8.

This thesis evaluates two different methods of estimating a three dimensional wind field based upon a limited number of irregularly-spaced observations. This work was performed for the 45th Weather Squadron to determine how well the two methods worked and their potential for use in a visualization program. The two methods evaluated were Barnes' method and a method called Kriging, which is commonly used in geostatistics. Both of these estimation techniques were implemented and then evaluated to determine how accurate the estimates were that they created. The methods' accuracies were determined by withholding an observation from the observed wind field data set, performing the estimation, and then comparing the estimated value at the point of the withheld observation with the actual value withheld. These performance results were compared to determine which method produced a more accurate estimated wind field. Barnes' method proved to be the less complicated to implement, but Kriging provided a more accurate estimate. Both of the methods had a significant amount of estimation error associated with them. This large error casts serious doubt on their abilities to produce an accurate enough estimation to be useful in analyzing the low-level wind field.