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Resource capture by single leaves

Description: Leaves show a variety of strategies for maximizing CO{sub 2} and light capture. These are more meaningfully explained if they are considered in the context of maximizing capture relative to the utilization of water, nutrients and carbohydrates reserves. There is considerable variation between crops in their efficiency of CO{sub 2} and light capture at the leaf level. Understanding of these mechanisms indicate some ways in which efficiency of resource capture could be level cannot be meaningfull… more
Date: May 1, 1992
Creator: Long, S.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conceptual strategy for design, implementation, and validation of a biomarker-based biomonitoring capability

Description: This document describes a strategy for defining specific objectives for biomarker studies and for designing and implementing a biomonitoring study that focuses on these objectives. In researching this subject, it became clear to the authors that the subject of biomarkers created a great deal of interest among scientists and regulators but that general acceptance of biomarkers as a tool for environmental protection was hampered by lack of a clear notion of how to develop and apply this approach.… more
Date: December 1, 1991
Creator: McCarthy, J.F.; Halbrook, R.S. & Shugart, L.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Proton microprobe analysis of zinc in skeletal tissues. [Proton induced x-ray emission analysis]

Description: A proton microprobe with windowless exit port was used to study zinc distributions in various types of skeletal tissues. The use of an external beam facilitated positioning of the targets for examination of particular points of interest. The proton microprobe is uniquely suited to this work since it combines high sensitivity for zinc determinations in thick samples with good spatial resolution. Measurements on rat and rabbit Achilles tendon showed a significant increase in zinc concentrations a… more
Date: June 1, 1980
Creator: Doty, S. B.; Jones, K. W.; Kraner, H. W.; Shroy, R. E. & Hanson, A. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulmonary macrophage and epithelial cells

Description: Separate abstracts were prepared for the 41 papers presented at the conference. Abstracts of two papers have appeared in previous issues of Energy Research Abstracts. (HLW)
Date: January 1, 1977
Creator: Sanders, C.L.; Schneider, R.P.; Dagle, G.E. & Ragan, H.A. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of coal combustion and gasification process contaminants on the neuromuscular system. Sub-task on peripheral nervous system effects. Final report

Description: This study is a preliminary investigation of the possible toxic effects of flyash particles from an experimental fluidized-bed combustion process at the Morgantown Energy Research Center. Emphasis has been placed on the action of trace metals present on the surface and in the matrix of the particulates emissions, since these elements may be toxic in low dosages. It is well established that external calcium (Ca/sup 2 +/) is essential for neuromuscular transmission. In the absence of Ca/sup 2 +/ … more
Date: January 1, 1979
Creator: Franz, G.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electromagnetic field effects on cells of the immune system: The role of calcium signalling

Description: During the past decade considerable evidence has accumulated demonstrating the exposures of cells of the immune system to relatively weak extremely-low-frequency (ELF) electromagnetic fields (< 300 Hz) can elicit cellular changes which might be relevant to in-vivo immune activity. However, knowledge about the underlying biological mechanisms by which weak fields induce cellular changes is still very limited. It is generally believed that the cell membrane and Ca{sup 2+} regulated activity is in… more
Date: July 1, 1991
Creator: Walleczek, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pigment-protein complexes

Description: The photosynthetically-active pigment protein complexes of procaryotes and eucaryotes include chlorophyll proteins, carotenochlorophyll proteins, and biliproteins. They are either integral components or attached to photosynthetic membranes. Detergents are frequently required to solubilize the pigment-protein complexes. The membrane localization and detergent solubilization strongly suggest that the pigment-protein complexes are bound to the membranes by hydrophobic interactions. Hydrophobic int… more
Date: January 1, 1980
Creator: Siegelman, H W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Division of Biological and Medical Research annual report 1978

Description: The research during 1978 in the Division of Biological and Medical Research, Argonne National Laboratory, is summarized. Studies related to nuclear energy include responses of beagles to continuous low-level /sup 60/Co gamma radiation, and development of leukemic indicators; comparison of lifetime effects in mice of low-level neutron and /sup 60/Co gamma radiation; genetic effects of high LET radiations; and metabolic and therapeutic studies of heavy metals. Studies of nonnuclear energy sources… more
Date: January 1, 1978
Creator: Rosenthal, M.W. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dimensionality of the human electroencephalogram

Description: The goal was to evaluate anesthetic depth in patients by dimensional analysis. Although it was difficult to obtain clean EEG records from the operating room due to noise of electrocautery and movement of the patient's head by operating room personnel. The results are presented on one case of our calculations, followed by a discussion of problems associated with dimensional analysis of the EEG. We consider only two states: aware but quiet, and medium anesthesia. The EEG data we use comes from Ha… more
Date: January 1, 1986
Creator: Mayer-Kress, G. & Layne, S. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Biological effects of 60-Hz electric fields on small and large laboratory animals

Description: Rats and mice were exposed to 60-Hz electric fields up to 330 kV/m for durations as long as four months. No significant effects were found in the following major areas: metabolic status and growth; organ and tissue morphology; brain morphology; cardiovascular function; serum chemistry; reproduction; prenatal growth and development; teratology; bone growth; peripheral nerve function; humoral and cell-mediated immunity; susceptibility to viral infection; cell and membrane function; illness/malais… more
Date: January 1, 1981
Creator: Phillips, R.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PETC Review, Issue 4, Fall 1991

Description: In this issue of PETC Review, short discussion is given on the following topics: (1) Combustion 2000''--a low-emission boiler system coupled to a high-performance power system; (2) Liquid Transportation Fuels from Coal, Part 2: Indirect Liquefaction''--outline research program; (3) A Computer Expert System to Reduce Power Plant Emissions''--a system being developed to predict the economic, operational, and environmental benefits of using commercially achievable cleaned coals; (4) PETC's Flow An… more
Date: unknown
Creator: Blaustein, B. D.; Reiss, J.; Tarquinio, M. A.; Brown, J. & Evans, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermoregulation of fish and turtles in thermally stressed habitats. Annual progress report, October 1, 1977--September 30, 1978

Description: Morphometric and heating and cooling studies on over 100 largemouth bass, Micropterus salmoides, have provided the data needed to refine the time-dependent body temperature model for fish. The model can now track the changes in body temperature of a bass if its weight and water temperature are known. The model is most sensitive to body diameter, body wall thickness, and tissue conductivity. Doubling tissue conductivity is equivalent to decreasing body diameter by a factor or two. Turtles, Chrys… more
Date: June 1, 1978
Creator: Spotila, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Problems associated with dimensional analysis of electroencephalogram data

Description: The goal was to evaluate anesthetic depth for a series of 5 to 10 patients by dimensional analysis. It has been very difficult to obtain clean EEG records from the operating room. Noise is prominent due to electrocautery and to movement of the patient's head by operating room personnel. In addition, specialized EEG equipment must be used to reduce noise and to accommodate limited space in the room. This report discusses problems associated with dimensional analysis of the EEG. We choose one EEG… more
Date: January 1, 1985
Creator: Layne, S.; Mayer-Kress, G. & Holzfuss, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multipolar corneal-shaping electrode

Description: The disclosure relates to a multipolar probe using radiofrequency energy to reshape the cornea of an eye. The surface of the cornea is flushed continuously with a conductive coolant during operation.
Date: April 30, 1981
Creator: Doss, J.D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Effects of chemical carcinogens of hemopoiesis, immunopoiesis and viral oncogenesis. Technical progress report, December 1, 1977--September 30, 1978. [Mechanisms of potentiation of viral leukemogenesis by MMS, benzopyrene, and DMBA]

Description: During the past year we have concentrated on defining the circumstances under which methyl methanesulfonate (MMS), benzo(a) pyrene (BP), and 7,12-dimethylbenz(a)anthracene (DMBA) interact with Friend virus (FLV) to produce leukemia. The optimum scheduling for each and also the effective dose levels of the chemicals have been partially determined. There are at least three critical factors which govern whether or not a leukemogenic interaction can be shown between the chemical agents and the viru… more
Date: October 1, 1978
Creator: OKunewick, J.P.; Raikow, R.B. & Meredith, R.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Luminance controlled pupil size affects Landolt C task performance

Description: Subjects judged the orientation of a 2 min. gap Landolt C located at a distance of 2.4 m. The stimuli were presented in central vision on a CRT, at low to medium contrast. The effects of varying the spectrum and luminance of surround lighting were assessed on both pupil size (measured using infrared pupillometry during task performance) and task accuracy. The task display was protected from the surround lighting, so that its luminance and contrast could be varied independently of the changes in… more
Date: February 1, 1993
Creator: Berman, S.M. (Lawrence Berkeley Lab., CA (United States)); Fein, G. (Neurobehavioral Lab. Software, San Rafael, CA (United States)); Jewett, D.L. & Ashford, F. (ABRATech Corp., Mill Valley, CA (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study on the induction of thyroid tumors in rats using x irradiation in conjunction with a goitrogen. [1 methyl--2 mercaptoimidazole (methimazole)]

Description: The influence of acute localized thyroid x irradiation and chronic goitrogen administration, separately or combined, on thyroid tumor formation in mature female rats was studied. In the first experiment, the radiation doses were 0, 80, 160, 320, or 640 rads, and the dosages of goitrogen were 0, 4, or 40 parts per million (ppM) of 1 methyl - 2 mercaptoimidazole (MMI). The incidence of rats with thyroid tumors in any treated group receiving 0 or 4 ppM MMI was not significantly greater than the in… more
Date: January 1, 1979
Creator: Mahler, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Smolt Quality Assessment of Spring Chinook Salmon : Annual Report.

Description: The physiological development and physiological condition of spring chinook salmon are being studied at several hatcheries in the Columbia River Basin. The purpose of the study is to determine whether any or several smolt indices can be related to adult recovery and be used to improve hatchery effectiveness. The tests conducted in 1989 on juvenile chinook salmon at Dworshak, Leavenworth, and Warm Springs National Fish Hatcheries, and the Oregon State Willamette Hatchery assessed saltwater toler… more
Date: April 1, 1991
Creator: Zaugg, Waldo S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Continuation of studies on thermoregulation of fish and turtles in thermally stressed habitats. Annual progress report, 1 October 1978-30 September 1979

Description: A time dependent mathematical model accurately predicts heart, brain, and gut temperatures of largemouth bass. Body diameter, insulation thickness, and tissue thermal conductivity are controlling variables in the transfer of heat between a fish and water. Fish metabolic rate and water velocity across fish surfaces do not appreciably affect heat transfer rates. Multichannel temperature transmitters telemeter body temperatures of free swimming bass in Pond C on the Savannah River Plant while the … more
Date: June 1, 1979
Creator: Spotila, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of chemical carcinogens on hematopoietic stem cells: temporal correlation between methyl methane sulfonate induced depression of CFU-S and potentiation of Friend viral leukemogenesis in vivo. [Mice]

Description: Methyl methane sulfonate (MMS) was shown to reduce the number of transplantable pluripotent hematopoietic stem cells (CFU-S) in the mouse spleen. A mild depression in CFU-S numbers was seen as early as 1 hr after injection of the chemical carcinogen. Maximal depression was found to be at 5 hrs, followed by a recovery of up to 75% of normal levels by 24 hrs. Comparison of the data with earlier reslts which demonstrated a potentiating effect of MMS on viral leukemogenesis in vivo revealed a good … more
Date: May 1, 1979
Creator: Raikow, R. B.; OKunewick, J. P.; Meredith, R. F.; Brozovich, B. J. & Seeman, P. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Repair in fertilized eggs of mice and its role in the production of chromosomal aberrations. [Comparison of the effects of the chemical mutagens EMS, IMS, and TEM with the physical mutagen x rays]

Description: The fertilized egg may influence the yield of dominant-lethal mutations produced from chemical treatment of male postmeiotic germ cells to a small or large extent depending upon the mutagen used and the competence of the egg to repair the premutational lesions induced. The strain of females has small influence on the yield of dominant-lethal mutations induced by TEM or EMS in spermatids and spermatozoa. On the contrary, it has large influence in the case of IMS. In addition to this difference, … more
Date: January 1, 1979
Creator: Generoso, W M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Cellular proliferation and regeneration following tissue damage. Progress report

Description: Tissue cultures of rabbit retinal vasculature were studied in vivo and in vitro by scanning electron microscopy to elucidate the regnerative process from an injury. Human lens are now being compared with a goal for developing a bioassay for testing the effects of potentially toxic agents. (PCS)
Date: January 1, 1978
Creator: Harding, C.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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