253 research outputs found
Teaching ESL Literacy to the Functionally Illiterate Adult: Using Language Experience and Words in Color
This thesis attempts to arrive at a personal approach to teaching reading in English as a second language to functionally illiterate adults in a multilingual ESL classroom. There is a brief review of some of the research on teaching reading and on the reading process, as well as a review of the major teaching reading methodologies. Two approaches to teaching reading, the Language Experience Approach and Words in Color, are then focused on. The author suggests ways in which these two approaches can be adapted to the adult ESL classroom and integrated with other approaches. Finally, a series of concrete activities are described which combine learning to read in ESL and developing life coping skills in a new culture
Spectroscopic examination of old Chinese bronzes
Thesis (M.A.)--Boston Universit
A study of the sanitation of a swimming pool
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1913.MIT copy bound with: The reaction between ferric salts and thiocyanates in aqueous solution / Leon W. Parsons, Arthur E. Bellis.Includes bibliographical references.by Gerould T. Lane.B.S
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Characterization of Biochar for Use in Treating Copper (II) Polluted Stormwater
Recent studies have discovered that salmon, specifically juvenile Coho Salmon, have their olfactory senses inhibited by the presence of low concentrations of copper concentrations at very low concentrations. Much of this copper is deposited on roadways by car brake pads during their use. The copper is carried with stormwater into nearby waterways during rainfall events and placed into contact with salmon populations. Many different types of adsorbent materials are being investigated as possible methods to remediate the copper in stormwater before it reaches nearby waterways. Biochar, similar to granular activated carbon (GAC), is one of these adsorbent materials and can be made as a byproduct of bioenergy production, which makes it less expensive than many other adsorbents. Biochars can be made from various different feedstocks and under varying production conditions, allowing them to have a wide range of properties.
This study assesses six different biochars (hazelnut shells and Douglas fir feedstocks at 3 different pyrolysis temperatures) for their ability to adsorb copper and determines through characterization experiments which properties of the biochars are correlated to the best copper adsorption. Knowing which properties are important to the
biocharâs ability to adsorb copper allows biochars to be tailored toward the real life application of remediating the copper polluted stormwater. Batch isotherm experiments were performed and the data was analyzed using Langmuir and Freundlich isotherms. For the copper concentrations relevant to stormwater remediation H700 (hazelnut shells at 700°C), H500, and D700 biochars performed the best. Copper adsorption was observed to increase with increasing pyrolysis temperature. The addition of natural organic matter (NOM) to mimic realistic stormwater conditions reduced the copper adsorption by the biochar due to the copper complexing with the NOM.
Other trends noted were that increased adsorption of copper onto biochars correlates to higher biochar pH, increased fixed carbon content, and higher surface area. Although increased surface area does correlate to improved adsorption of copper by biochars, it does not appear to be the determining factor as the Douglas Fir biochars had a higher surface area (SA) compared to the Hazelnut shell biochars, but did not adsorb the copper as well. Based off FTIR spectra results for the hazelnut chars, aliphatic hydrocarbons are the only functional group type present at all three of the pyrolysis temperatures in addition to being the only functional group measured in the H700 char. Further investigation is recommended into the functional group analysis to determine if a specific group is responsible for increased copper adsorption. Overall, the H500 and H700 biochars performed the best out of all six and it is recommended that these be used for any future testing related to implementing them in-situ to remediate stormwater.
Key Words: Biochar, Stormwater, Copper, Remediation, Salmon, Environmental, Adsorbent, Isotherm, Langmuir, Freundlich, FTIR, BET, Characterizatio
Natural Law Institute Proceedings Vol. 2
https://scholarship.law.nd.edu/naturallaw_proceedings/1002/thumbnail.jp
'The Lay Folks' Mass Book' and Thomas Frederick Simmons: medievalism and the Tractarians
Thomas Frederick Simmons (1815-84) combined his ecclesiastical duties and liturgical interests with editing the fourteenth-century Middle English Lay folksâ mass book (1879) for the Early English Text Society, with the aim of showing the continuity of the English Church from the medieval period through the Reformation. In the light of modern scholarship, this article recontextualises both medieval text and Simmonsâs own editorial practice, and shows how Simmons, as a second generation Tractarian churchman, sought in this text â and others associated with it â evidence for the Church of Englandâs Catholic underpinning in an imagined medieval English Church
Phylogenetic analysis of the mitochondrial cytochrome c oxidase subunit 1 gene from 13 sipunculan genera: intra- and interphylum relationships
Sipunculans are a phylum of non-segmented, marine worms. Although they are well characterized morphologically, relationships within the phylum and the relationship of Sipuncula to other spiralian phyla have been strongly debated. I analyzed representatives of 13 of 17 described genera using a 654-bp fragment of the mitochondrial gene, cytochrome c oxidase subunit I, to construct the first intraphylum phylogenetic hypothesis for sipunculans based on molecular sequence data. Within the phylum, tree topologies are loosely congruent with a previously published morphological analysis, except that the monotypic genus Phascolopsis occurred within the Golfingiaformes as a sister group to, or nested within, the Themistidae. Phylogenetic analyses, including 30 sequences from additional invertebrate taxa, suggest that sipunculans are most closely related to the Annelida (including Echiura). A previously proposed sipunculan-molluscan relationship is not supported. While not universally accepted, this hypothesis is consistent with other recent and past data on phylum-level relationships.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75669/1/j.1744-7410.2003.tb00089.x.pd
The thermal ecology of some Colias butterfly larvae
The thermal ecology of Colias butterfly larvae has been studied, using simple modifications of previous thermistor implantation technology. Like their adults, these larvae rely on a repertoire of thermoregulatory behavior to control body temperature in relation to external heat sources and sinks. They neither heat nor cool by metabolic means. They display narrow, well-marked body temperature ranges for their major activity, feeding. These are 10â15 °C lower than the maximum activity temperatures of the adults. Also in contrast to the adults, the locations of the larval activity maxima differ by several degrees C between the taxa studied. In each taxon studied the rate of feeding reaches a maximum in a body temperature range corresponding roughly to the temperature range maximizing the occurrence of feeding. The overall larval growth rate is maximized under constant temperature regimes corresponding to the maximum feeding range. A qualitative model for larval activity in the field in relation to daily temperature changes is constructed and apparently supported in its essentials. These results are discussed in relation to other aspects of larval ecology, notably predator pressure, and some speculation on their meaning for larval metabolic organization is raised.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47110/1/359_2004_Article_BF00694570.pd
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