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Environmental Modulation of the Onset of Air-breathing of the Siamese Fighting Fish and the Blue Gourami

Environmental Modulation of the Onset of Air-breathing of the Siamese Fighting Fish and the Blue Gourami

Access: Use of this item is restricted to the UNT Community.
Date: December 2015
Creator: Mendez Sanchez, Jose Fernando
Description: This study determined the effect of hypoxia on air-breathing onset and physiological and morphological characters in larvae of the air breathing fishes Trichopodus trichopterus and Betta splendens. Larvae were exposed intermittently (12/12 h daily) to 20, 17, and 14 kPa of PO2 from 1 to 40 days post-fertilization. Survival, onset of air breathing, wet body mass, O2, Pcrit were measured every 5 dpf. Hypoxia advanced by 4 days, and delayed by 9 days, the onset of air breathing in Betta and Trichopodus, respectively. Hypoxia increased larval body length, wet mass, and labyrinth organ respiratory surface of Betta, but did not affect these factors in Trichopodus. Hypoxic exposure increased O2 by 50-100% at each day throughout larval development in Betta, but had no effect on larval Trichopodus. Hypoxia decreased Pcrit in Betta by 37%, but increased Pcrit in Trichopodus by 70%. Larval Betta reared in hypoxia showed a modified heart rate:opercular rate ratio (3:1 to 2:1), but these changes did not occur in Trichopodus. Compared to Betta, the blood of Trichopodus had a higher P50 and much smaller Bohr and Root effects. These interspecific differences are likely due to ecophysiological differences: Betta is a non- obligatory air-breather after 36 dpf with ...
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Environmental Philosophy and the Ethics of Terraforming Mars: Adding the Voices of Environmental Justice and Ecofeminism to the Ongoing Debate

Environmental Philosophy and the Ethics of Terraforming Mars: Adding the Voices of Environmental Justice and Ecofeminism to the Ongoing Debate

Date: August 2013
Creator: French, Robert Heath
Description: Questions concerning the ethics of terraforming Mars have received some attention from both philosophers and scientists during recent decades. A variety of theoretical approaches have been supplied by a number of authors, however research pursuant to this thesis has indicated at least two major blindspots in the published literature on the topic. First, a broad category of human considerations involving risks, dangers, and social, political, and economic inequalities that would likely be associated with efforts to terraform Mars have been woefully overlooked in the published literature to date. I attempt to rectify that oversight by employing the interpretive lens of environmental justice to address questions of environmental colonialism, equality in terms of political participation and inclusion in decision making structures, risks associated with technological progressivism, and responses to anthropogenic climate change. Only by including the historically marginalized and politically disenfranchised "voices," of both humans and nonhumans, can any future plan to terraform Mars be deemed ethical, moral or just according to the framework provided by environmental justice. Furthermore, broader political inclusion of this sort conforms to what ecofeminist author Val Plumwood calls the "intentional recognition stance" and provides an avenue through which globally societies can include nonanthropocentric considerations in decision ...
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Environmental Pollution, Material Scarcity and the Development of Aluminum Recycling Reverse Channels of Distribution

Environmental Pollution, Material Scarcity and the Development of Aluminum Recycling Reverse Channels of Distribution

Date: August 1977
Creator: Ginter, Peter M.
Description: None
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Environmental Protection Law of the People's Republic of China

Environmental Protection Law of the People's Republic of China

Date: December 26, 1989
Creator: [China] National People's Congress
Description: This law is established for the purpose of protecting and improving public health and environmental ecology, preventing and controlling pollution and other public hazards, safeguarding human health, and facilitating the development of socialist modernization in China.
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Environmental Quality; Greenhouse Gas Emissions

Environmental Quality; Greenhouse Gas Emissions

Date: 2007
Creator: House of Representatives
Description: Establishes as state policy statewide greenhouse gas emissions limits at or below the statewide greenhouse gas emissions levels in 1990 to be achieved by January 1, 2020. Establishes greenhouse gas emissions reduction task force to prepare a work plan and regulatory scheme to achieve the statewide greenhouse gas emissions limits.
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Environmental Scanning Behavior in Physical Therapy Private Practice Firms: its Relationship to the Level of Entrepreneurship and Legal Regulatory Environment

Environmental Scanning Behavior in Physical Therapy Private Practice Firms: its Relationship to the Level of Entrepreneurship and Legal Regulatory Environment

Date: August 1988
Creator: Schafer, D. Sue
Description: This study examined the effects of entrepreneurship level and legal regulatory environment on environmental scanning in one component of the health services industry, private practice physical therapy. Two aspects of scanning served as dependent variables: (1) extent to which firms scrutinized six environmental sectors (competitor, customer, technological, regulatory, economic, social-political) and (2) frequency of information source use (human vs. written). Availability of information was a covariate for frequency of source use. Three levels of entrepreneurship were determined by scores on the Covin and Slevin (1986) entrepreneurship scale. Firms were placed in one of three legal regulatory categories according to the state in which the firm delivered services. A structured questionnaire was sent to 450 randomly selected members of the American Physical Therapy Association's Private Practice Section. Respondents were major decision makers, e.g., owners, chief executive officers. The sample was stratified according to three types of regulatory environment. A response rate of 75% was achieved (n = 318) with equal representation from each stratum. All questionnaire subscales exhibited high internal reliability and validity. The study used a 3x3 factorial design to analyze the data. Two multivariate analyses were conducted, one for each dependent variable set. Results indicated that "high" entrepreneurial level ...
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Environmental Scanning Practices of Manufacturing Firms in Nigeria

Environmental Scanning Practices of Manufacturing Firms in Nigeria

Date: May 1992
Creator: Sawyerr, Olukemi Olaitan
Description: The purpose of this study was to examine scanning practices in a developing country by looking at the scanning behavior of executives of Nigerian manufacturing firms. Specifically, this study examined the decision maker's perception of environmental uncertainty (PEU), the frequency and degree of interest with which decision makers scan each sector of the environment, the frequency of use of various sources of information, the number of organizational adjustments made in response to actions of environmental groups, and the obstacles encountered in collecting information from the environment.
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Environmental Variability and Climate Change

Environmental Variability and Climate Change

Date: 2001
Creator: Past Global Changes (PAGES)
Description: The PAGES research community works toward improving our understanding of the Earth's changing environment. By placing current and future global changes in a long term perspective, they can be assessed relative to natural variability. Since the industrial revolution, the Earth System has become increasingly affected by human activities. Natural and human processes are woven into a complex tapestry of forcings, responses, feedbacks and consequences. Deciphering this complexity is essential as we plan for the future. Paleoenvironmental research is the only way to investigate Earth System processes that operate on timescales longer than the period of instrumental records.
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Environmental Virtue Education: Ancient Wisdom Applied

Environmental Virtue Education: Ancient Wisdom Applied

Date: August 2005
Creator: Lindemann, Monica A.
Description: The focus of environmental philosophy has thus far heavily depended on the extension of rights to nonhuman nature. Due to inherent difficulties with this approach to environmental problems, I propose a shift from the contemporary language of rights and duties to the concept of character development. I claim that a theory of environmental virtue ethics can circumvent many of the difficulties arising from the language of rights, duties, and moral claims by emphasizing the cultivation of certain dispositions in the individual moral agent. In this thesis, I examine the advantages of virtue ethics over deontological and utilitarian theories to show the potential of developing an ecological virtue ethic. I provide a preliminary list of ecological virtues by drawing on Aristotle's account of traditional virtues as well as on contemporary formulations of environmental virtues. Then, I propose that certain types of rules (rules of thumb) are valuable for the cultivation of environmental virtues, since they affect the way the moral agent perceives a particular situation. Lastly, I offer preliminary formulations of these rules of thumb.
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Environmentally-friendly purchase intentions: Debunking the misconception behind apathetic consumer attitudes.

Environmentally-friendly purchase intentions: Debunking the misconception behind apathetic consumer attitudes.

Date: December 2008
Creator: Umberson, Kirsten
Description: By measuring intentions to purchase, this research gives insight into environmental attitudes, pressures to purchase environmentally friendly apparel, factors that inhibit environmentally friendly apparel purchasing, awareness of environmentally friendly apparel purchase options, and marketing insight into the eco-friendly consumer. The theory of planned behavior (TPB) was used to assess consumer purchasing intentions for environmentally friendly apparel. The TPB consists of a three-pronged measurement: individual attitudes, subjective norms, and perceived behavioral control. Individual attitudes were gauged on three dimensions which included environmental attitudes, demographic patterns, and environmentally friendly apparel purchase intentions. Subjective norms involve social pressure to engage in eco-friendly behavior, perceived individual environmental impact, and desire for uniqueness in dress. Finally, perceived behavioral control was studied through previous environmentally friendly apparel purchases, accessibility of environmentally friendly apparel purchase options, and cost of environmentally friendly apparel. The results revealed that individual environmental attitudes, social pressure to behave environmentally friendly, perceived individual environmental impact, desire for uniqueness in dress, past environmentally friendly apparel purchases, accessibility of environmentally friendly apparel purchase options, and cost of environmentally friendly apparel all have an impact on intentions to purchase environmentally friendly apparel. The variable with the strongest relationship to intentions was social pressure. A demographic profile ...
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Envisioning a Geospatial Data Portal and Curation Network

Envisioning a Geospatial Data Portal and Curation Network

Date: May 25, 2016
Creator: Burns, Douglas
Description: This presentation is part of the panel "Envisioning a Geospatial Data Portal and Curation Network" from the 2016 Texas Conference on Digital Libraries and contains a brief overview on the GIS data and services provided by the University of North Texas.
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Enzyme Assays Using Earthworms for Assessing Innate and Nonspecific Immunotoxicity of Xenobiotics

Enzyme Assays Using Earthworms for Assessing Innate and Nonspecific Immunotoxicity of Xenobiotics

Date: May 1992
Creator: Chen, Shing-Chong
Description: Principal objectives of my research were to: (1) report for the first time that coelomocytes are able to reduce NBT dye and confirm the presence of lysozyme-like activity in earthworm; (2) develop a standard methodology for determination of NBT reduction and lysozyme-like activity in earthworms; (3) compare NBT reduction and lysozyme-like activity in earthworms with those of murine and human cells and fluids; and (4) demonstrate the sensitivity of earthworm NBT reduction and lysozyme-like activity as the assays using matrics in refuse-derived fuel fly ash (RDFF) and CuSO4.
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The Eosinophil and Lysophospholipase Responses in Mice Infected with Trichinella spiralis: A Role for the Lymphocyte and Macrophage

The Eosinophil and Lysophospholipase Responses in Mice Infected with Trichinella spiralis: A Role for the Lymphocyte and Macrophage

Date: August 1986
Creator: Adewusi, Iyabode Olukemi, 1958-
Description: The relationship among eosinophils, lysophospholipase activity and the immune response in animals infected with Trichinella spiralis was studied using in vivo and in vitro techniques. In an in vivo experiment, anti-thymocyte serum (ATS) was administered to mice infected with T. spiralis and its effects on intestinal lysophospholipase (EC 3.1.1.5.) activity, peripheral blood, bone marrow and intestinal eosinophilia were measured in the same experimental animal. The ATS caused a significant temporally related suppression of both the tissue lysophospholipase response and eosinophilia, in all three compartments. These findings support the hypothesis that parasite-induced eosinophilia is the cause of the increased lysophospholipase activity of parasitized tissue and that the responses are thymus cell-dependent. In vitro experiments demonstrated that the eosinophil was the primary inflammatory cell source of lysophospholipase among eosinophils, neutrophils macrophages and lymphocytes. The role of other cells and antigen in the production of the enzyme by the eosinophil was also investigated in vitro• Results demonstrated that eosinophils cultured with both T. spiralis antigen and other leukocytes yielded enzyme activities significantly greater than eosinophils cultured alone or with only antigen. More specific experiments showed that T-lymphocytes were the cells responsible for influencing the eosinophils' lysophospholipase activity in the presence of antigen, and ...
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The Eosinophil Response in Mice Infected with Trichinella spiralis or Trichinella pseudospiralis as Indicated by Phospholipase B Activity

The Eosinophil Response in Mice Infected with Trichinella spiralis or Trichinella pseudospiralis as Indicated by Phospholipase B Activity

Date: December 1992
Creator: Hsu, Shing-Chien
Description: The host eosinophil response was compared in mice infected with either T. spiralis or T. pseudospiralis by determination of levels of splenic and intestinal phospholipase B, a marker enzyme for eosinophils. Primary infection of naive mice and challenge infection of homologously sensitized mice with T. pseudospiralis resulted in significantly lower tissue phospholipase B activities than infection with T. spiralis. Mice homologously challenged with T. pseudospiralis did exhibit an anamnestic eosinophil response compared to mice given a primary T. pseudospiralis infection. This anamnestic response, however, was significantly lower than the eosinophil response seen in sensitized mice given a homologous T. spiralis challenge. Mice sensitized to T. spiralis or T. pseudospiralis and heterologous challenge demonstrated an elevated eosinophil response compared to mice given a primary infection with either parasite. The heterologous challenge response, however, was not as intense as found for sensitized mice given a homologous challenge.
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EPA's Denial of the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases Under Section 202(a) of the Clean Air Act

EPA's Denial of the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases Under Section 202(a) of the Clean Air Act

Date: August 2010
Creator: United States. Environmental Protection Agency
Description: This document addresses a petition to the U.S. EPA to reconsider findings that could have an economic impact on businesses due to the enforcement of the Clean Air Act. The petitioners questioned the climate science and data, and this denial argues that the petitioners used The document denies the petition on the basis of the petitioners providing inadequate and unscientific arguments.
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EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act

EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act

Date: July 29, 2010
Creator: United States. Environmental Protection Agency. Office of Atmospheric Programs. Climate Change Division.
Description: This set of volumes is a response by the EPA to ten petitions filed to challenge the determination that climate change is real. The EPA dismisses the petitioners' claims, reiterating the evidence of anthropogenic global climate change.
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EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act

EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act

Date: July 29, 2010
Creator: United States. Environmental Protection Agency. Office of Atmospheric Programs. Climate Change Division.
Description: This set of volumes is a response by the EPA to ten petitions filed to challenge the determination that climate change is real. The EPA dismisses the petitioners' claims, reiterating the evidence of anthropogenic global climate change.
Contributing Partner: UNT Libraries
EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act

EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act

Date: July 29, 2010
Creator: United States. Environmental Protection Agency. Office of Atmospheric Programs. Climate Change Division.
Description: This set of volumes is a response by the EPA to ten petitions filed to challenge the determination that climate change is real. The EPA dismisses the petitioners' claims, reiterating the evidence of anthropogenic global climate change.
Contributing Partner: UNT Libraries
Ephippia Production, Activation, and Use of Ex-Ephippio Neonates of Ceriodaphnia Dubia as Toxicity Test Organisms

Ephippia Production, Activation, and Use of Ex-Ephippio Neonates of Ceriodaphnia Dubia as Toxicity Test Organisms

Date: August 1992
Creator: Poage, Duane W.
Description: None
Contributing Partner: UNT Libraries
The Epic Element in Hiawatha

The Epic Element in Hiawatha

Date: August 1953
Creator: Bass, Mary Laura
Description: By tracing the development of the epic, oral and written, as in Chapter III, the qualities that are characteristic of the epic and the devices associated with the epic through continued usage were found to be the constant factors upon which the definition of the epic is formulated. The application to Hiawatha of the epic definition in terms of form, theme, subject matter, characters, tone, the use of the supernatural, and the use of characteristic devices, strengthens the thesis that Longfellow has written an epic.
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Epic Qualities in Moby-Dick

Epic Qualities in Moby-Dick

Date: August 1952
Creator: Russell, John Joe
Description: Many critics not satisfied with explaining Moby-Dick in terms of the novel, have sough analogies in other literary genres. Most often parallels have been drawn from epic and dramatic literature. Critics have called Moby-Dick either an epic or a tragedy. After examining the evidence presented by both schools of thought, after establishing a workable definition of the epic and listing the most common epic devices, and after examining Moby-Dick in terms of this definition and discovering many of the epic devices in it, I propose the thesis that Melville has written an epic, not unlike the great epics of the past.
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The Epic Strain in Joseph Conrad

The Epic Strain in Joseph Conrad

Date: January 1968
Creator: Witt, Dorothy
Description: This thesis will attempt to show that the three major works of Conrad's middle period -- Nostromo, The Secret Agent, and Under Western Eyes -- are essentially literary epics.
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Epidemiological Evaluation of Pain Among String Instrumentalists

Epidemiological Evaluation of Pain Among String Instrumentalists

Date: May 2011
Creator: Meidell, Katrin Liza
Description: Pain and performance anxiety (PA) are common problems among string players. Therefore, the purpose of this study was to assess and compare PA and prevalence rates and locations of pain in violinists, violists, cellists, and bassists. Subjects completed a questionnaire that included sections on demographics, musical background, practice habits, musculoskeletal problems, non-musculoskeletal problems, and PA. Anthropometric data were gathered on all 115 subjects. Results show that there are differences in both pain and PA across instrument groups. Violinists reported the highest number of pain sites, followed by violists, bassists, and cellists. The left shoulder was the most-often reported pain site, followed by the neck and right shoulder. Aching was the most cited term selected to describe pain. Several anthropometric indices were significantly correlated with pain, notably right thumb to index finger span in both cellists and bassists. In all instrument groups, at least one pain site was significantly correlated with one of four PA questions. Results warrant the development of intervention strategies and further study of the relationship between pain and performance anxiety.
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Eplucher Les Oignons (Peeling the Onions)

Eplucher Les Oignons (Peeling the Onions)

Date: December 2002
Creator: Wester, Judith C.
Description: My creative intent is to connect with viewers at an emotional level. My chosen metaphor is “Peeling the Onion.” The implication of the metaphor is that understanding is achieved after one looks below the surface and views the underlying “layers.” The challenge is to find images that are personally interesting and also connect with the viewer. At times the creative process proceeds in linear manner and at other times it seems to take on a life of its own. During my search for a balance between the literal and ambiguous, I explored the circle, the spiral and the sphere. Printmaking offers unique opportunities to produce evocative imagery. Drawing is the basic tool I employ to define form and my use of printmaking processes allows for evolving the image over time. The immediacy and spontaneity of my drawings is combined with a methodical approach to image development. Exploring the spiral, sphere, circles and the metaphor “Peeling the Onion” has provided me a means of giving a form to my concepts and hopefully a connection with the viewer.
Contributing Partner: UNT Libraries