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Vitamin A Administration and Dark Adaption of Second and Third Grade Children

Description: This study was formulated for the following purposes: (1) To determine if a learning factor is involved when repeated tests are made with a dark adaption instrument, (2) To determine if the dark adaption of a group of second and third grade children showing poor dark adaption can be improved by the daily administration of Haliver oil capsules, (3) To obtain a dark adaption curve for two hundred twenty-three grade children of Denton, Texas.
Date: 1940
Creator: Silk, Maurice Raper
Partner: UNT Libraries

Further Studies on the Dark Adaptation of Elementary School Children

Description: The present study is part of a long time cooperative study of the Education and Home Economics Departments of North Texas State Teachers College begun in 1940. The purpose is to compare the dark adaptations of second and third grade children made in 1940 with those made in 1941, and to determine also the dark adaptation of a group of fifth and sixth grade children receiving vitamin A concentrate.
Date: 1941
Creator: Gary, Lois W.
Partner: UNT Libraries

The Use of the Bio-Photometer in Determining the Dark Adaptation of Pre-School Age Children

Description: Because of the paucity of evidence with regard to dark adaptation and the vitamin A status of pre-school children, this study is made. The purpose, therefore, is to add to the available data on this subject through an investigation of the bio-photometer as a means of detecting vitamin A deficiency in pre-school children.
Date: 1941
Creator: Wright, Mary Lou McCauley
Partner: UNT Libraries

The use of the bio-photometer in determining the dark adaptation of pre-school age children

Description: The degree to which the normal eye can adapt to the dark is related to or dependent upon the eye's ability to regenerate visual purple. The relationship of vitamin A to the visual cycle has caused much development in improved methods of detecting vitamin A deficiency. For the most part these methods have been applied to adults and school age children. This study seeks to analyze this method as applied to pre-school age children.
Date: August 1941
Creator: Wright, Mary Lou McCauley
Partner: UNT Libraries

Dark Adaptation Studies with Adults and Children, Using the Biophotometer

Description: The present study is a part of a long-time cooperative study of the Home Economics Department of the North Texas State Teachers College, begun in 1940. The purpose is to compare the dark adaptations of second and third-grade children made in 1940 with those made of the same children in 1941 and in 1942. Also included in this study is the comparison of a group of freshmen college men made in 1940 with a group of twenty-five men made in 1942. An attempt is also made to determine whether an individual has higher dark adaptation on sunshiny days than on cloudy days.
Date: 1942
Creator: Collins, Mary Margaret
Partner: UNT Libraries

Analytical Audit: Full Report

Description: This report presents an analytical audit on issues, progress and priorities in climate change by auditing current knowledge and policy choices to advise on progress and evidence; consolidating the existing analysis on UK and international climate change issues and our existing and projected emissions; presenting a balanced view of the trade-offs that Ministers face, based upon a consistent overview; and identifying priorities that Ministers may want to explore further.
Date: unknown
Creator: Great Britain. Office of Climate Change
Partner: UNT Libraries

Climate Change: Science Compendium 2009

Description: This Climate Change Science Compendium, based on the wealth of peer-reviewed research published by researchers and institutions since 2006, has been compiled by UNEP in response to that request. The findings indicate that ever more rapid environmental change is underway with the pace and the scale of climate change accelerating, along with the confidence among researchers in their forecasts. The Compendium will provide important insights into the rapidly developing and fast moving realm of climate science so that the choices made by leaders in Copenhagen in December are informed by the best and the latest research available to the international community.
Date: May 2010
Creator: McMullen, Catherine P. & Jabbour, Jason
Partner: UNT Libraries

Finacial Institutions Taking Action on Climate Change

Description: This report details finance sector leadership actions and their contribution to solving the climate change challenge across the following six areas: 1. Low carbon and energy efficiency finance and investing, 2. Emissions reducing finance and investing, 3. Adaptation finance and investing, 4. Measurement and transparency, 5. Engagement with companies, 6. Engagement with policy makers.
Date: December 8, 2014
Creator: World Bank Group
Partner: UNT Libraries

Second National Communication on Climate Change of The People’s Republic of China

Description: The Second National Communication on Climate Change of the People’s Republic of China, is divided into 8 parts with relevant chapters underneath: national circumstances, national GHG inventory, climate change impacts and adaptation, policies and actions for climate change mitigation.
Date: December 19, 2014
Creator: the People’s Republic of China
Partner: UNT Libraries

Effects of electronic identification, temperature monitoring, and ELA on the meat industry. [Electronic monitoring of cattle herds and serological testing for diseases]

Description: Electronic identification of CaHl/sub e/ and temperature monitoring of tolerance to environmental changes are technically feasible for the management of breeder herds and dairy cattle. Some commercial organizations are already manfacturing simple forms of electronic identification. A nearly ideal system can become a reality if the various potential user groups work together with the developers, manufacturers, and regulatory agencies. Widespread use of electronic identification and temperature monitoring in the livestock industry would improve the cost/benefit ratios to all portions of the industry by enhancing efficiency of production and management of records. The enzyme-labeled antibody (ELA) serological test of cattle in the slaughter plant makes it possible to screen for many diseases in a simple, fast inexpensive way.
Date: January 1, 1977
Creator: Holm, D. M.
Partner: UNT Libraries Government Documents Department

Transmutations across hierarchical levels. [Development of large-scale ecological models]

Description: The development of large-scale ecological models depends implicitly on a concept known as hierarchy theory which views biological systems in a series of hierarchical levels (i.e., organism, population, trophic level, ecosystem). The theory states that an explanation of a biological phenomenon is provided when it is shown to be the consequence of the activities of the system's components, which are themselves systems in the next lower level of the hierarchy. Thus, the behavior of a population is explained by the behavior of the organisms in the population. The initial step in any modeling project is, therefore, to identify the system components and the interactions between them. A series of examples of transmutations in aquatic and terrestrial ecosystems are presented to show how and why changes occur. The types of changes are summarized and possible implications of transmutation for hierarchy theory, for the modeler, and for the ecological theoretician are discussed.
Date: January 1, 1977
Creator: O'Neill, R. V.
Partner: UNT Libraries Government Documents Department

Thermoregulation and temperature relations of alligators and other large ectotherms inhabiting thermally stressed habitats. Annual progress report, 1 July 1976--30 September 1977. [Ecology of Par Pond, Savannah River Reservation]

Description: Progress is reported on studies of the biophysical and thermal relationships between large ectotherms and their aquatic environment. Data are reported from laboratory and field studies on alligators, turtles, and fish. Mathematical models of the effect of body size and physical characteristics on temperature regulation of ectotherms and of thermal stress in aquatic organisms were developed. Results are included of field studies on the physiological and behavioral adjustments of turtles in response to changes in water temperature produced by thermal effluents in PAR Pond at the Savannah River Ecology Laboratory (SREL).
Date: June 1, 1977
Creator: Spotila, J. R.
Partner: UNT Libraries Government Documents Department

Predicting effects of cold shock: modeling the decline of a thermal plume

Description: Predicting direct impact of cold shock on aquatic organisms after termination of power plant thermal discharges requires thermal tests that provide quantitative data on the resistance of acclimated species to lower temperatures. Selected examples from the literature on cold shock resistance of freshwater and marine fishes are illustrated to show predictive use. Abrupt cold shock data may be applied to field situations involving either abrupt or gradual temperature declines but yield conservative estimates under the latter conditions. Gradual cold shock data may be applied where heated plumes gradually dissipate because poikilotherms partially compensate for lowering temperature regimes. A simplified analytical model is presented for estimating thermal declines in terminated plumes originating from offshore, submerged discharges where shear current and boundary effects are minimal. When applied to site-specific conditions, the method provides time-temperature distributions for correlation with cold resistance data and, therefore, aids in assessing cold shock impact on aquatic biota.
Date: October 1, 1977
Creator: Becker, C.D.; Trent, D.S. & Schneider, M.J.
Partner: UNT Libraries Government Documents Department

Physiological stress of acidification on fishes and its manifestation. Technical progress report, October 1, 1977--September 30, 1978

Description: The hypothesis was tested that the reproductive function would exhibit compensation to temperature if the organism was bred and reared at temperatures which produced less than optimal reproductive performance. Desert pupfish, Cyprinodon n. nevadensis, were bred and the eggs reared at the optimum temperature for reproduction, 28/sup 0/C, and at two marginal temperatures, 24/sup 0/ and 32/sup 0/C. Each brood was divided into three groups and reproductive performance was tested at the rearing temperature and at two alternate temperatures to which they had never before been exposed. The eggs laid per spawning and eggs laid per gram body weight per day showed no compensation to rearing temperature. Reproductive performance was optimal at 28/sup 0/C and was poor at both marginal temperatures, regardless of the previous thermal history of the fish. Lower hatchability at 32/sup 0/C was associated with a thin egg coat, small yolk diameter, and low gonosomatic index as compared with the same measurements at the lower temperatures.
Date: January 1, 1978
Creator: Gerking, S.D.
Partner: UNT Libraries Government Documents Department

Recovery of anaerobic digestion after exposure to toxicants. Final report

Description: The concept that methane fermentation cannot tolerate chronic or slug doses of toxicants has almost totally precluded methane fermentation as a viable contender for the treatment of industrial wastewaters. This study assayed a wide variety of toxicants, heavy metals, inorganic salts, organic chemicals, solvents, and antibiotics which are used in industrial processes and, therefore, appear in the industrial wastewaters therefrom. Toxicity was related to the reduction in methane production of a control containing no toxicant. The response of methane fermentation after exposure to a toxicant was assayed with unacclimated cultures as well as cultures which had been acclimated to increasing concentrations of the toxicant over long periods of time. The reversible nature of the toxicants was assayed by adding slug doses to plug flow anaerobic filters and recording gas production prior to, during, and after toxicant addition.
Date: December 1, 1979
Creator: Yang, J.; Parkin, G. F. & Speece, R. E.
Partner: UNT Libraries Government Documents Department

Mitigating strategies for CO/sub 2/ problems

Description: Vast uncertainties surround the ability to predict the social effects of increased carbon dioxide concentrations in the atmosphere during the next century; fossil fuel combustion rates will change, predicting global climate changes is difficult, and predicting the resulting social reactions to these change is essentially impossible. Unfortunately, the effects of carbon dioxide are likely to be insidious and difficult to connect to climate change. Myriad effects, both good and bad are unlikely to be recognized as caused by carbon dioxide. Conscious adaptation policies have the government or other social institutions act directly to mandate change in behavior through laws, fines, or subsidies. Unfortunately, such actions cannot be tailored to achieve precise objectives; they are blunt tools that should be used only for important goals and then sparingly. Unconscious adaptation takes place through behavioral changes induced by the market place or social institutions. These mechanisms can be swift and powerful, but are difficult to manipulate. Actions such as monitoring climate change and taking care to inform important groups of the current state of knowledge on carbon dioxide induced climate changes can help to speed adaptation along with contingency planning and development of nonfossil fuel technologies can speed adaptation. More important are plans which would set unconscious adaptation into motion, such as plans to disseminate information on the problem and behavior which will help individuals or firms. Of greatest importance is having a society that can quickly perceive and adapt to the new regime. This means a strong economy, high scientific and engineering capabilities, a well educated population, and a more flexible, resilient capital stock. Carbon dioxide can serve as a catalyst in promoting policies that are justified for a host of reasons.
Date: August 1, 1980
Creator: Lave, L B
Partner: UNT Libraries Government Documents Department

Employed Stepmothers: Psychological Stress, Personal Adjustment, Psychological Needs, and Personal Values

Description: Employed and non-employed stepmothers were compared on four psychological dimensions: stress, adjustment, needs, and values. Employed stepmothers were hypothesized to experience greater stress, lower adjustment, different needs, and different values. Racial and race by employment status differences along these four dimensions were also addressed.
Date: August 1983
Creator: Rila, Barbara A. (Barbara Ann)
Partner: UNT Libraries