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1990

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Articles 1 - 30 of 1679

Full-Text Articles in Life Sciences

Stabilization/Solidification Of Organic Containing Wastes Using Organophilic Clay And Coal Fly Ash, Edith Lagoutte Dec 1990

Stabilization/Solidification Of Organic Containing Wastes Using Organophilic Clay And Coal Fly Ash, Edith Lagoutte

Theses

The relative merits of eight different coal fly ashes for use in the stabilization/Solidification of a waste containing both heavy metals and pentachlorophenol were investigated. Also studied, was the possible use of either untreated or treated (with hexade-cyl ammonium bromide) clay to enhance the stabilization of the organic. The sample composition was : 62% foundry baghouse dust (or 60% if 2% clay as added to the sample), 4.5% cement, 14% coal fly ash, 19.5% water. Pentachlorophenol was chosen as represen¬tative of the organic contamination. All tests were performed after curing the samples at 22°C, 98% Rh ...


A Cytochemical Scanning Electron Microscopy Study Of Non-Specific Acid Esterase And Acid Phosphatase Activities In Human Peripheral Blood Lymphocytes, A. Campos, E. Fernández-Segura, J. M. García-López Dec 1990

A Cytochemical Scanning Electron Microscopy Study Of Non-Specific Acid Esterase And Acid Phosphatase Activities In Human Peripheral Blood Lymphocytes, A. Campos, E. Fernández-Segura, J. M. García-López

Scanning Microscopy

We analyzed the distribution patterns of nonspecific acid esterase and acid phosphatase activities with cytochemistry-scanning electron microscopy in backscattered and secondary electron imaging modes in isolated normal human peripheral blood lymphocytes . The analysis of non-specific acid esterase activity in the backscattered electron imaging mode showed, in some cells, focal distribution with a well-defined, homogenous deposit. Two patterns of acid phosphatase activity were evident with the backscattered electron imaging mode, i.e., focal and granular. Peripheral blood lymphocytes showing focal activity of both enzymes presented a smooth surface with few scattered microvilli as seen with the secondary electron imaging mode ; while ...


Conventional And High Resolution Scanning Electron Microscopy Of Biological Sectioned Material, C. Scala, G. Cenacchi, P. Preda, M. Vici, R. P. Apkarian, Gianandrea Pasquinelli Dec 1990

Conventional And High Resolution Scanning Electron Microscopy Of Biological Sectioned Material, C. Scala, G. Cenacchi, P. Preda, M. Vici, R. P. Apkarian, Gianandrea Pasquinelli

Scanning Microscopy

Intracellular structures of embedded biological tissues (rat kidney, myocardium and small intestine) were observed by conventional-scanning electron microscopy (C-SEM) and high-resolution scanning electron microscopy (HR-SEM) after glass knife sectioning. C-SEM of semi -thin sections of material processed the same way as conventional transmission electron microscopy (TEM) provided strong backscattered electron (BSE)-dependent, two-dimensional secondary electron images (SEI(-)) which precisely integrated and further extended previous light microscopy (LM) observation of the same specimen. In addition, the three-dimensional (3-D) arrangement of intracellular organelles was appreciated using a mixture of acetone-soluble acrylic resin in place of epoxy resin embedding. Since the identification of ...


Cytology Of Pollutant Metals In Marine Invertebrates: A Review Of Microanalytical Applications, J. A. Nott Dec 1990

Cytology Of Pollutant Metals In Marine Invertebrates: A Review Of Microanalytical Applications, J. A. Nott

Scanning Microscopy

X-ray microanalysis (XRMA) is customized for investigations of the metabolic and detoxification strategies of heavy metals taken by marine organisms from polluted environments. Sites of uptake, intracellular accumulation, transport and excretion are visualized, analysed and quantified . Cryopreparation techniques are required to prevent the translocation or loss from specimens of soluble metal species.

In marine invertebrates, metals are detoxified by systems of chemical binding and intracellular compartmentalization. XRMA investigations have concentrated on marine molluscs and crustaceans and even within these restricted groups there are marked inter-species differences in the biochemical and cytological processes which reduce metal bioavailability. Some detoxification systems also ...


Phenotypic Subpopulations Of Macrophages And Dendritic Cells In Human Spleen, Patrick J. Buckley Dec 1990

Phenotypic Subpopulations Of Macrophages And Dendritic Cells In Human Spleen, Patrick J. Buckley

Scanning Microscopy

Using immunohistochemical techniques and a large number of monoclonal antibodies, the presence and distribution of phenotypic subpopulations of macrophages (Mθs) and dendritic cells in human spleen were assessed. The results of this study show that different subsets of Mθs and dendritic cells are present in the spleen and that some of these occupy discrete microanatomic locations . In the red pulp (RP) certain antigens are expressed by different proportions of uniformly distributed Mθs in the cords . On the other hand, some antigens are present on Mθs that form clusters of variable size within the red pulp . These include CD11c, CD 15 ...


Innervation And Vascular Pharmacodynamics Of The Mouse Spleen, Frank D. Reilly Dec 1990

Innervation And Vascular Pharmacodynamics Of The Mouse Spleen, Frank D. Reilly

Scanning Microscopy

Neurohistochemical and in vivo and electron microscopic methods demonstrated α-and ,β-adrenergic receptors and adrenergic innervation in arterioles and "arterial" capillaries of the mouse spleen. Such innervation and receptors in venules and channels within the red pulp were sparse. Cholinergic innervation and receptors were judged to be absent in the microvasculature. Histamine elicited arteriolar dilation which was blocked by metiamide suggesting the presence of H2 receptors. However , following blockade of H2 receptors, histamine produced arteriolar constriction. Serotonin elicited only venular constriction. Lactic acid caused arteriolar constriction; bradykinin and prostaglandins (PG) E2 and PGF triggered arteriolar constriction, but ...


Agriculture News Release - 1990-12-21, United States. Congress. House. Committee On Agriculture, E. De La Garza Dec 1990

Agriculture News Release - 1990-12-21, United States. Congress. House. Committee On Agriculture, E. De La Garza

Kika de la Garza Congressional Papers - Agriculture Committee News Releases

No abstract provided.


Development And Use Of A Pneumoconiosis Database Of Human Pulmonary Inorganic Particulate Burden In Over 400 Lungs, Jerrold L. Abraham, Bryan R. Burnett, Andrew Hunt Dec 1990

Development And Use Of A Pneumoconiosis Database Of Human Pulmonary Inorganic Particulate Burden In Over 400 Lungs, Jerrold L. Abraham, Bryan R. Burnett, Andrew Hunt

Scanning Microscopy

Over 400 cases with data from in situ electron microprobe quantitation of non-fibrous inorganic particles (e.g., silica, alumino-silicates, talc, metals) in pulmonary tissue sections, and data from quantitative digestion analyses for fiber content (e.g., asbestos, silica, alumino-silicates, man-made fibers, talc) comprise an extensive microcomputer data set of lung particle burden. When allied with demographic and histopathologic information the result is a comprehensive database of occupational pulmonary pathology. Examples of the kinds of information which can be extracted from the database include: 1) summary information on the types sizes and associations of particles in lungs with a variety of ...


Northeast Research Station Watertown, South Dakota Annual Progress Report, 1990, Agricultural Experiment Station, Plant Science Department Dec 1990

Northeast Research Station Watertown, South Dakota Annual Progress Report, 1990, Agricultural Experiment Station, Plant Science Department

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1990 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes information on the 1990 crop season, including precipitation data, grain and crop research, breeding, and variety testing, soybean row space study, weed control, crop performance test, 1990 crop yields system productivity from 1985-1990, plant nutrition, soil test and research, estimated soil erosion.


Characterizing Fines To Predict Their Performance In A Sheet Of Paper, Rodney W. Tibboles Dec 1990

Characterizing Fines To Predict Their Performance In A Sheet Of Paper, Rodney W. Tibboles

Paper Engineering Senior Theses

Many studies have been performed with the purpose of determining the effects of fines on paper properties. However, many of these studies fail to develop characterizations of the fines themselves before relating the presence of these fines to sheet properties. This study first developed complete characterizations of fines and then related the properties of the fines to properties of paper containing these fines.

Bleached kraft, unbleached kraft, and TMP pulps from a southern pine were used in this project. Characterization of the fines included determination of physical features of the fines, size distribution, water retention value (WRV), drainability, and compressibility ...


An Ecological Description Of Three Black Bass Species In Two Northeastern Kentucky Muskellunge Streams, Albert F. Surmont Jr. Dec 1990

An Ecological Description Of Three Black Bass Species In Two Northeastern Kentucky Muskellunge Streams, Albert F. Surmont Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the Department of Biological and Environmental Sciences at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Albert F. Surmont, Jr. on December 10, 1990.


Ultrastructural Effects Of Ionizing Radiation On Plant Cells, Á. Keresztes, E. Kovács Dec 1990

Ultrastructural Effects Of Ionizing Radiation On Plant Cells, Á. Keresztes, E. Kovács

Scanning Microscopy

Ultrastructural effects of ionizing irradiation were investigated on the specific constituents of plant cells, primarily in fruits, with reference to mushroom cells and comparable data in the literature. In the cell wall the dissolution of the middle lamellae, probably due to radiation damage of pectin, and irregular thickenings were found. In the vacuole the quantity of inclusions changed, or unusual aggregations appeared, presumably in connection with altered phenolic biosynthesis . In chloroplasts the senescence was inhibited, and dedifferentiation occurred into agranal state. In amyloplasts starch hydrolysis was hind ere d. These platidial effects are considered as visible signs of inhibition of ...


The Viral Envelope Gene Is Involved In Macrophage Tropism Of A Human Immunodeficiency Virus Type 1 Strain Isolated From Brain Tissue, Zhen-Qian Lou, Charles Wood, Jay Levy, Cecilia Cheng-Mayer Dec 1990

The Viral Envelope Gene Is Involved In Macrophage Tropism Of A Human Immunodeficiency Virus Type 1 Strain Isolated From Brain Tissue, Zhen-Qian Lou, Charles Wood, Jay Levy, Cecilia Cheng-Mayer

Virology Papers

Human immunodeficiency virus type 1 (HIV-1) strains isolated from the central nervous system (CNS) may represent a subgroup that displays a host cell tropism different from those isolated from peripheral blood and lymph nodes. One CNS-derived isolate, HIV-lSFl28A, which can be propagated efficiently in primary macrophage culture but not in any T-cell lines, was molecularly cloned and characterized. Recombinant viruses between HIV-lSF128A and the peripheral blood isolate HIV-lSF2 were generated in order to map the viral gene(s) responsible for the macrophage tropism. The env gene sequences of the two isolates are about 91.1% homologous, with ...


Implications Of A Mandatory Supply Control Program For Sustainable Agriculture In South Dakota, David Becker, Thomas L. Dobbs Dec 1990

Implications Of A Mandatory Supply Control Program For Sustainable Agriculture In South Dakota, David Becker, Thomas L. Dobbs

Economics Research Reports

This is one of a series of reports by the authors on implications for "conventional" and "sustainable" farming systems of various public policy options. Previously released was a report by Dobbs, Becker, and Taylor (1990) which provided an overview of the implications of several policy options. The present report focuses specifically on mandatory supply controls. A future report will deal with the implications of flexibility and triple base policy options.


Livestock Budgets And Whole-Farm Economic Analysis: South Dakota Sustainable Agriculture Case Farms, Donald Taylor, Clarence Mends, Thomas L. Dobbs Dec 1990

Livestock Budgets And Whole-Farm Economic Analysis: South Dakota Sustainable Agriculture Case Farms, Donald Taylor, Clarence Mends, Thomas L. Dobbs

Economics Research Reports

In this report, livestock budgets for nine sustainable farmers in South Dakota who raise beef cattle and two of the same farmers who raise hogs are presented. Results of whole-farm economic analysis--in which the livestock, sustainable crop rotation, and non-sustainable rotation crop enterprise budgets on the respective farms are integrated with each other--are also presented. The final sections of the report cover results of analyses of (1) livestock price sensitivity and (2) on-farm manure production and disposition.


Southeast South Dakota Experiment Farm Annual Progress Report, 1990, Agricultural Experiment Station Dec 1990

Southeast South Dakota Experiment Farm Annual Progress Report, 1990, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This thirtieth annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn production and performance, soybean research and planting, soil testing, alfalfa yield test, fertilizer testing, herbicide research, crop rotation, sorghum, small grains, livestock research, and pest and weed control.


The Viral Envelope Gene Is Involved In Macrophage Tropism Of A Human Immunodeficiency Virus Type 1 Strain Isolated From Brain Tissue, Zhen-Qian Liu, Charles Wood, Jay Levy, Cecilia Cheng-Mayer Dec 1990

The Viral Envelope Gene Is Involved In Macrophage Tropism Of A Human Immunodeficiency Virus Type 1 Strain Isolated From Brain Tissue, Zhen-Qian Liu, Charles Wood, Jay Levy, Cecilia Cheng-Mayer

Virology Papers

Human immunodeficiency virus type 1 (HIV-1) strains isolated from the central nervous system (CNS) may represent a subgroup that displays a host cell tropism different from those isolated from peripheral blood and lymph nodes. One CNS-derived isolate, HIV-lSF128A , which can be propagated efficiently in primary macrophage culture but not in any T-cell lines, was molecularly cloned and characterized. Recombinant viruses between HIV-1SF128A and the peripheral blood isolate HIV-ISF2 were generated in order to map the viral gene(s) responsible for the macrophage tropism. The env gene sequences of the two isolates are about 91.1% homologous, with ...


Effects Of Errors In Pedigree On Three Methods Of Estimating Breeding Value For Litter Size, Backfat And Average Daily Gain In Swine, T. E. Long, R. K. Johnson, J. W. Keele Dec 1990

Effects Of Errors In Pedigree On Three Methods Of Estimating Breeding Value For Litter Size, Backfat And Average Daily Gain In Swine, T. E. Long, R. K. Johnson, J. W. Keele

Faculty Papers and Publications in Animal Science

Estimated breeding value (EBV) was calculated based on either individual phenotype (SP), an index of individual phenotype and full- and half-sib family averages (SI) or Best Linear Unbiased Prediction (BLUP). Calculations were done with correct data or data with 5, 10, 15 or 20% of the records per generation containing pedigree errors. Traits considered were litter size (LS), backfat (BF) and average daily gain (ADG). When data were correct, BLUP resulted in an advantage in expected genetic gain over SP of 22, 7.2 or 30.8% for LS, BF and ADG, respectively, and over SI of 9.6, 3 ...


A Report On Black-Tailed Prairie Dogs In Nebraska-- Their Biology, Behavior, Ecology, Management, And Responses To A Visual Barrier Fence, Nancy S. Foster Dec 1990

A Report On Black-Tailed Prairie Dogs In Nebraska-- Their Biology, Behavior, Ecology, Management, And Responses To A Visual Barrier Fence, Nancy S. Foster

Dissertations & Theses in Natural Resources

I examined the effects of a visual barrier fence, which had a see-through visibility of 600/0, on the foraging, vigilance, and aggressive behaviors of adult female black-tailed prairie dogs from June through August 1990 in central Nebraska. I also examined changes in their home ranges and use of an area in response to this fence. Prairie dogs prefer an open view of their surroundings. Therefore, I expected animals near a visual barrier to spend more time in vigilance and aggression, and less time foraging. Adult female prairie dogs exposed to the visual barrier devoted more time to foraging and ...


Introduction Of Robert B. Grieve As The Henry Baldwin Ward Medalist For 1990 Dec 1990

Introduction Of Robert B. Grieve As The Henry Baldwin Ward Medalist For 1990

Faculty Publications from the Harold W. Manter Laboratory of Parasitology

Transcript of the introduction of Robert B. Grieve as the American Society of Parasitologists Henry Baldwin Ward Medalist for 1990, given by Daniel R. Brooks.


Lake Mead Nutrient Enhancement Project, Peter D. Vaux, Larry J. Paulson, Nevada Department Of Wildlife, National Oceanic And Atmospheric Administration Dec 1990

Lake Mead Nutrient Enhancement Project, Peter D. Vaux, Larry J. Paulson, Nevada Department Of Wildlife, National Oceanic And Atmospheric Administration

Publications (WR)

The Lake Mead Fertilization Project is a research program designed to investigate the potential for using large-scale artificial fertilization to enhance the game fisheries of this reservoir through an increase in the population of threadfin shad, the system's primary forage species. A substantial decline in the population of largemouth bass, together with poor condition of adult striped bass, are the two major issues affecting the Lake Mead game fisheries. Both issues have been hypothesized to be a result of an inadequate amount of forage in the reservoir. Previous studies have in turn suggested that a major factor limiting the ...


West River Agricultural Research And Extension Center Progress Report, 1990, Agricultural Experiment Station Dec 1990

West River Agricultural Research And Extension Center Progress Report, 1990, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1990 annual progress report of the West River Crops Soils Research and Extension Center, South Dakota Agricultural Experiment Station. This report includes: a weather summary for all west river counties involved in research, small grain variety trials and demonstrations, grain crops variety trials, oilseed crops variety testing, and demonstrations, management, tillage and cultural practices, weed control research projects and disease control.


B832: The Profitability Of Supplemental Irrigation For Maine Potatoes, Michele C. Marra, Timothy A. Woods Dec 1990

B832: The Profitability Of Supplemental Irrigation For Maine Potatoes, Michele C. Marra, Timothy A. Woods

Bulletins

The question has arisen among Maine potato growers and other industry personnel whether irrigation technologies can be transferred successfully into humid growing areas such as in Maine and whether they can benefit the Maine potato industry. This report presents the findings of a stud y that attempts to answer the question of whether adoption of two of these newer technologies might be profitable for an individual grower in Maine.


The Nebline, December 1990 Dec 1990

The Nebline, December 1990

The NEBLINE Newsletter Archive from UNL Extension in Lancaster County

Contents:

Ag Update: Agricultural News & Events

Home Extension News

On-the-Grow: Horticulture News & Recommendations

The Cloverline: 4-H News and Events

Extension Calendar

and other extension news


Health And Adjustment In Young Adults: Preliminary Findings From An Epidemiologic Survey, Naomi Breslau, Glenn C. Davis, Patricia Andreski Dec 1990

Health And Adjustment In Young Adults: Preliminary Findings From An Epidemiologic Survey, Naomi Breslau, Glenn C. Davis, Patricia Andreski

Henry Ford Hospital Medical Journal

No abstract provided.


Effects Of Age, Neuropsychological Impairment, And Medication On Regional Cerebral Blood Flow In Schizophrenia And Major Affective Disorder, Perry C. Goldstein, Gregory G. Brown, Andrew Marcus, James R. Ewing Dec 1990

Effects Of Age, Neuropsychological Impairment, And Medication On Regional Cerebral Blood Flow In Schizophrenia And Major Affective Disorder, Perry C. Goldstein, Gregory G. Brown, Andrew Marcus, James R. Ewing

Henry Ford Hospital Medical Journal

Reports of abnormalities of regional cerebral blood flow (rCBF) in patients with schizophrenia and major affective disorder are contradictory. To gain a better understanding of the possible sources of these contradictions, the rCBF and neuropsychological functioning of 15 schizophrenics, 15 patients with major affective disorder, and 15 age-matched controls were studied. No group differences in overall rCBF, percent frontal devialion in flow, or rCBF asymmetries were observed. Both overall rCBF and percent frontal deviation of rCBF were reduced with greater age and with increasing neuropsychological impairment. Dosage of neuroleptic medication was associated with reduced whole brain flow, not with percent ...


Response To Cpap And Uppp In Apnea, Frank J. Zorick, Timothy Roehrs, William Conway, George Potts, Thomas Roth Dec 1990

Response To Cpap And Uppp In Apnea, Frank J. Zorick, Timothy Roehrs, William Conway, George Potts, Thomas Roth

Henry Ford Hospital Medical Journal

Ninety-two consecutive patients with obstructive sleep apnea syndrome (OSAS) were studied before and six weeks after treatment with either nasal continuous positive airway pressure (CPAP) or uvulopalatopharyngoplasty (UPPP) (n = 46 per group). Assignment of patients to treatment was based on clinical considerations and patient preference. Patients were assessed by nocturnal polysomnography and performance on the Multiple Sleep Latency Test (MSLT) the following day. Before treatment, the CPAP and UPPP groups did not differ in sleep-related respiratory disturbance, oxygenation during sleep, fragmentation of sleep, or the level of excessive daytime sleepiness indicated by the MSLT. Both treatments produced significant improvement on ...


Passive Inhalation Of Cocaine By Infants, Sabrina M. Heidemann, Mark G. Goetting Dec 1990

Passive Inhalation Of Cocaine By Infants, Sabrina M. Heidemann, Mark G. Goetting

Henry Ford Hospital Medical Journal

Cocaine abuse has increased greatly in recent years, creating important medical, legal, and social problems. Urine drug testing is used to diagnose cocaine ingestion. The presence of the cocaine metabolite benzoylecgonine (BZ) is commonly believed to be proof of recent cocaine intoxication. However, oral ingestion of even a minute quantity of cocaine can result in a positive test result. BZ was detected in the urine of four nonbreast-fed infants aged 6 weeks to 14 months who were admitted with diagnoses unrelated to cocaine poisoning. These infants were exposed to cocaine by passive inhalation of vapors generated by adult caretakers smoking ...


The Smoke-Out At Henry Ford Hospital, Or How Henry Ford Created A Smoke-Free Environment, Sidney Goldstein Dec 1990

The Smoke-Out At Henry Ford Hospital, Or How Henry Ford Created A Smoke-Free Environment, Sidney Goldstein

Henry Ford Hospital Medical Journal

No abstract provided.


Back Matter Dec 1990

Back Matter

Henry Ford Hospital Medical Journal

No abstract provided.