Feeding Habits of Wisconsin\u27s Predominant Lotic Plecoptera, Ephemeroptera, and Trichoptera

Feeding habits of nymphs or larvae of 101 species of Plecoptera, Ephemeroptera, and Trichoptera collected from Wisconsin\u27s streams were determined by examining foregut contents. The percent by volume of animal, live vascular plant, filamentous algae, diatom, and detrital material recovered is reported. Plecoptera in the suborder Filipalpia were herbivoredetritivores, and most in the suborder Setipalpia were carnivores. Exceptions were Isoperla bilineata (Say), an omnivore, and Isoperla signata (Banks) and I. slossonae (Banks), both detritivore-herbivores. Except for omnivore Ephemerella cornuta Morgan, Ephemeroptera were detritivore-herbivores. Feeding habits of Trichoptera larvae were diverse. Species of Rhyacophilidae, Polycentropodidae, and Phyrganeidae were all carnivores, while Hydropsychidae, Leptoceridae, and Brachycentridae were generally omnivores. Species of Glossomatidae, Philopotamidae, Psychomyiidae, Hydroptilidae, Limnephilidae, Lepidostomatidae, Sericostomatidae, and Helicopsychidae were primarily detritivoreherbivores

Timescales of crystallization and viscous flow of the bulk glass-forming Zr-Ti-Ni-Cu-Be alloys

Crystallization behavior and equilibrium viscosity of a series of alloys in the Zr-Ti-Cu-Ni-Be system are studied using multiple techniques to determine the various contributions to glass-forming ability. Low-temperature time-temperature-transformation diagrams of alloys whose compositions lie at equally spaced points along the tie line from Zr38.5Ti16.5Cu15.25Ni9.75Be20 to Zr46.25Ti8.25Cu7.5Ni10Be27.5 are measured during isothermal annealing of initially amorphous specimens. Surprisingly, for all investigated alloys, a primary quasicrystalline phase forms at a rate which varies substantially with alloy composition. Subsequent constant heating measurements, x-ray-diffraction patterns obtained after various states of annealing, beam bending viscosity results, and previous thermal analysis are all used to describe the influences on crystallization in this series. The description of both the kinetic and thermodynamic aspects of crystallization allows for an explanation of the crystallization mechanism. In addition, it explains why, in this series, thermal stability is greatest in those alloys with the poorest glass-forming ability. Overall, the investigations reveal that simple criteria like thermal stability or high viscosity fail to predict the glass-forming ability in complex bulk glass-forming systems

Critical cooling rate and thermal stability of Zr–Ti–Cu–Ni–Be alloys

The critical cooling rate as well as the thermal stability are measured for a series of alloys in the Zr–Ti–Cu–Ni–Be system. Upon cooling from the molten state with different rates, alloys with compositions ranging along a tie line from (Zr70Ti30)55(Ni39Cu61)25Be20 to (Zr85Ti15)55(Ni57Cu43)22.5Be27.5 show a continuous increase in the critical cooling rate to suppress crystallization. In contrast, thermal analysis of the same alloys shows that the undercooled liquid region, the temperature difference between the glass transition temperature and the crystallization temperature, is largest for some compositions midway between the two endpoints, revealing that glass forming ability does not correlate with thermal stability. The relationship between the composition-dependent glass forming ability and thermal stability is discussed with reference to a chemical decomposition process

Italian renais. villa design

"Approved - Cum Laude, May 15th, H.F. Major, Ass. Prof. in Landscape Gardening, Department of Horticulture, University of Missouri, Columbia, Mo."Typescript.I will offer a description of the old Roman villas and their history as well as of the greater Italian villas, grouped according to geographical location, and with special consideration of the design and ground arrangement features. The building architecture and interior decoration is not within the scope of this paper, and neither do I consider their individual history, although very interesting in many cases, as a subject for lengthy consideration here. The examples given of the American adaptation of Italian villa design are not numerous nor are they extensive in reality. They show a well-marked tendency, however, of our country home architects to adopt formal methods of ground arrangement with a particular emphasis on Italian ideas of composition. They likewise illustrate that the Italian villa ideals are quite well adapted to the demands of our own country residence when the natural surroundings are favorable.Includes bibliographical reference

A follow-up study of selected characteristics of students graduating from the Stockbridge School of Agriculture in Floriculture, Landscape Operations, and Turf Management from 1953 to 1963.

Thesis (M.S.

Investigations into ultraviolet matrix-assisted laser desorption

Matrix-assisted laser desorption (MALD) is a technique for converting large biomolecules into gas phase ions. Some characteristics of the commonly used UV matrices are determined. Solubilities in methanol range from 0.1 to 0.5 M. Solid phase absorption spectra are found to be similar to solution, but slightly red-shifted. Acoustic and quartz crystal microbalance signals are investigated as possible means of UV-MALD quantitation. Evidence for the existence of desorption thresholds is presented. Threshold values are determined to be in the range of 2 to 3 MW/cm[superscript]2. A transient imaging technique based on laser-excited fluorescence for monitoring MALD plumes is described. Sensitivity is well within the levels required for studying matrix-assisted laser desorption, where analyte concentrations are significantly lower than those in conventional laser desorption. Results showing the effect of film morphology, particularly film thickness, on plume dynamics are presented. In particular, MALD plumes from thicker films tend to exhibit higher axial velocities. Fluorescent labeling of protein and of DNA is used to allow imaging of their UV-MALD generated plumes. Integrated concentrations are available with respect to time, making it possible to assess the rate of desorption and the rate of fragmentation. The spatial and temporal distributions are important for the design of secondary ionization schemes to enhance ion yields and for the optimization of ion collection in time-of-flight MS instruments to maximize resolution. Such information could also provide insight into whether ionization is closely associated with the desorption step or whether it is a result of subsequent collisions with the matrix gas (e.g., proton transfer). Although the present study involves plumes in a normal atmosphere, adaptation to measurements in vacuum (e.g., inside a mass spectrometer) should be straightforward