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- BookHarry L. Field, John M. Long.Summary: Introduction to Agricultural Engineering Technology: A problem Solving Approach is an invaluable text for agriculture students at the introductory level. The fourth edition has been thoroughly updated and reorganized to meet the current units and standards of the American Society of Agricultural and Biological Engineers (ASABE). The book aims to: Familiarize students with a wide range of applications of engineering principles to agriculture Discuss a selection of independent but related topics Advance students' problem solving abilities Each chapter lists education objects, introductory material, and example problems where appropriate. In addition problems using ISO (metric) units, are now included. The authors have added a new chapter on precision agriculture. About the Authors: Harry L. Field is an Associate Professor of Agricultural Mechanics in the Department of Biosystems and Agricultural Engineering at Oklahoma State University. John Long is an Assistant Professor of Biological Engineering in the Department of Biosystems and Agricultural Engineering at Oklahoma State University.
Contents:
1. Problem Solving
2. Significant Figures and Standard Form
3. Common Units of Measure
4. Simple Machines
5. Internal Combustion Engines
6. Power Trains
7. Tractors and Power Units
8. Machinery Calibration
9. Equipment Efficiency and Capacity
10. Economics of Agricultural Machinery
11. Sound and Noise
12. Measuring Distance
13. Angles and Areas
14. Land Description
15. Differential and Profile Leveling
16. Weather
17. Water Runoff
18. Erosion and Erosion Control
19. Irrigation
20. Handling, Moisture Management, and Storage of Biological Products
21. Animal Waste Management
22. Insulation and Heat Flow
23. Heating, Ventilation, and Air-Conditioning
24. Selection of Structural Members
25. Principles of Electricity
26. Series and Parallel Circuits
27. Sizing Conductors
28. Electric Motors
Appendices
Index. - ArticleSome characteristics of Escherichia coli strains isolated from extraintestinal infections of humans.Minshew BH, Jorgensen J, Swanstrum M, Grootes-Reuvecamp GA, Falkow S.J Infect Dis. 1978 May;137(5):648-54.Escherichia coli strains isolated from extraintestinal infections of humans possess a constellation of phenotypes not usually found in random fecal isolates, enteropathogenic strains, or the laboratory strain E. coli K12. The phenotypes found more commonly in extraintestinal strains include hemolysin production, the biosynthesis of colicin V, and the hemagglutination of human erythrocytes in the presence of D-mannose (HAh). Hemolysin is assumed to be a cytotoxic factor, colicin V is assumed to interfere with host defense mechanisms, and HAh is assumed to play a role in specific tissue adherence. In addition, greater than or equal to 50% of E. coli strains from extraintestinal infections kill allantoically inoculated 13-day-old chick embryos. Some (20%) of the fecal E. coli also kill embryos, but E. coli K12 is innocuous in this virulence model. The plasmids for hemolysin and colicin V production have been transmitted to E. coli K12 derivatives but are not sufficient to convert laboratory strains to a form virulent for the chick embryo.