Technology: Servant or Master of the Online Teacher?

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Protargol in veterinary surgery

Citation: Pyle, Charles A. Protargol in veterinary surgery. Senior thesis, Kansas State Agricultural College, 1907.Morse Department of Special CollectionsIntroduction: Protargol is a fine yellowish brown powder, a compound of albumen and silver, odorless and with a weak metallic taste. The drug contains 8.3% silver and seems to be a salt containing silver in a masked form as well as a firm combination with a proteid. This product is soluble in one part of water, in glycerine and blood serum. It is not precipitated by alkaline sulphates, albumen, sodium chloride or acids and has a neutral reaction. It is superior to Silver Nitrate in being much less irritating, indifferent to sodium chloride and albumen and in that it does not discolor the skin and exceeds the Nitrate in certainty and efficiency of action. Protargol is a powerfully penetrating antiseptic and mild astringent in catarrhal and purulent inflammations of mucous cavities and tracts. In purulent wounds, abscesses, fistulous tracts it is effective in destroying bacteria and promoting healing. Protargol was first introduced into medicine in 1897 by Prof. Neisser, as a local medication for gonorrhoea in man. It is also used as a local treatment for catarrhal or purulent urethritis in the Human. The drug is indicated in acute catarrhal and purulent conjunctivitis in from one half to ten per cent aquous solutions. In tubercular ulcers, fistulous tracts it is reported very effectual. In catarrhal and ulcerative affections of the ear it is indicated. Abscesses, purulent arthritis, persistant granulating wounds and wounds of the foot yield readily to this drug. Internally the drug is indicated in canine practice as a relief of hemorrhages and ulcerations of the alimentary tract and purulent inflammations of the genito urinary tract. The drug in powder or in solution must be preserved from the action of light or heat. In making, the solutions the menstruum should be cold and the drug placed on the surface and allowed to dissolve slowly or with gentle agitation. The solution is reddish brown in color depending on the strength of the drug

Bacteria of the skin

Citation: Pyle, Charles A. Bacteria of the skin. Senior thesis, Kansas State Agricultural College, 1904.Morse Department of Special CollectionsIntroduction: The necessary requirements for the growth of bacteria being considered, it readily appealed to the writer that the surface of the human body furnished all of these necessary requirements. The excretions and exfoliated epithelium of the skin, the warmth of the body and protection from sunlight and fresh air by the clothing afford very favorable conditions for the growth of these organisms. To first find what bacteria are on the skin under varying conditions, their resistance to disinfectants and them determine their importance in surgical work and hygiene, this thesis is attempted

A critique of behaviorism

Thesis (Ph.D.)--Boston Universit

Predicted rocket and shuttle effects on stratospheric ozone

The major chemical effluents of either solid- or liquid-fueled rockets that can potentially perturb stratospheric ozone include chlorine compounds (HCl), nitrogen compounds (NO(x)), and hydrogen compounds (H2 and H2O). Radicals (Cl, ClO, H, OH, HO2, NO, and NO2) formed directly or indirectly from rocket exhaust can cause the catalytic destruction of ozone. Other exhaust compounds that could presumably lead to ozone destruction either by direct reaction with ozone or by providing a surface for heterogeneous processes include the particulates Al2O3, ice, and soot. These topics are discussed in terms of the possible effects of rocket exhausts on stratospheric ozone

Ozone Response to Aircraft Emissions: Sensitivity Studies with Two-dimensional Models

Our first intercomparison/assessment of the effects of a proposed high-speed civil transport (HSCT) fleet on the stratosphere is presented. These model calculations should be considered more as sensitivity studies, primarily designed to serve the following purposes: (1) to allow for intercomparison of model predictions; (2) to focus on the range of fleet operations and engine specifications giving minimal environmental impact; and (3) to provide the basis for future assessment studies. The basic scenarios were chosen to be as realistic as possible, using the information available on anticipated developments in technology. They are not to be interpreted as a commitment or goal for environmental acceptability

Tephra stratigraphy and eruptive volume of the May, 2008, Chaitén eruption, Chile

On May 1st 2008 Mount Chaitén (southern Chile) interrupted a long period of quiescence, generating a sequence of explosive eruptions and causing the evacuation of Chaitén town located a few kilometers south of the volcano. The activity was characterized by several explosive events each associated with plumes which reached up to about 19km above sea level. The products were dispersed across a wide area, with the finest ash reaching the Atlantic coast of Argentina. Our field observations in the proximal-medial area (3-25km from the vent) indicate that the May 2008 tephra deposit consists of numerous layers, most of which can be correlated with individual eruptive events. These layers vary from extremely fine-grained ash to layers of lapilli and blocks, composed of both juvenile and lithic material. Here we describe the stratigraphy and physical characteristics of the May 2008 deposits, and propose a reconstruction of the timing of the May 2008 events. The deposits are mainly associated with the three main explosive phases which occurred on 1st-2nd May, 3rd-5th May and 6th May, with an estimated bulk tephra volume of 0.5-1.0km3 (integration of both exponential and power-law fitting). For the 6th May event, represented by a layer composed mainly of lithic lapilli and blocks (>2mm), an isopleth map was compiled from which a 19km plume height was determined, which is in good agreement with satellite observation

Sr-Nd-Pb-Hf isotope results from ODP Leg 187: Evidence for mantle dynamics of the Australian-Antarctic Discordance and origin of the Indian MORB source

New high precision PIMMS Hf and Pb isotope data for 14–28 Ma basalts recovered during ODP Leg 187 are compared with zero-age dredge samples from the Australian-Antarctic Discordance (AAD). These new data show that combined Nd-Hf isotope systematics can be used as an effective discriminant between Indian and Pacific MORB source mantle domains. In particular, Indian mantle is displaced to lower εNd and higher εHf ratios compared to Pacific mantle. As with Pb isotope plots, there is almost no overlap between the two mantle types in Nd-Hf isotope space. On the basis of our new Nd-Hf isotope data, we demonstrate that Pacific MORB-source mantle was present near the eastern margin of the AAD from as early as 28 Ma, its boundary with Indian MORB-source mantle coinciding with the eastern edge of a basin-wide arcuate depth anomaly that is centered on the AAD. This observation rules out models requiring rapid migration of Pacific MORB mantle into the Indian Ocean basin since separation of Australia from Antarctica. Although temporal variations in isotopic composition can be discerned relative to the fracture zone boundary of the modern AAD at 127°E, the distribution of different compositional groups appears to have remained much the same relative to the position of the residual depth anomaly for the past 30 m.y. Thus significant lateral flow of mantle along the ridge axis toward the interface appears unlikely. Instead, the dynamics that maintain both the residual depth anomaly and the isotopic boundary between Indian and Pacific mantle are due to eastward migration of the Australian and Antarctic plates over a stagnated, but slowly upwelling, slab oriented roughly orthogonal to the ridge axis. Temporal and spatial variations in the compositions of Indian MORB basalts within the AAD can be explained by progressive displacement of shallower Indian MORB-source mantle by deeper mantle having a higher εHf composition ascending ahead of the upwelling slab. Models for the origin of the distinctive composition of the Indian MORB-source based on recycling of a heterogeneous enriched component that consist of ancient altered ocean crust plus<10% pelagic sediment are inconsistent with Nd-Hf isotope systematics. Instead, the data can be explained by a model in which Indian mantle includes a significant proportion of material that was processed in the mantle wedge above a subduction zone and was subsequently mixed back into unprocessed upper mantle