... PRESSURE, SOUND, ATTENUATION, PHOTOGRAPHIC ANALYSIS, HIGH SPEED PHOTOGRAPHY, TETRYL, CELLULOSE ACETATES. ...

We have good statistical methods to: (1) determine whether concentrations of a contaminant are attenuating over time, (2) determine the rate of attenuation and confidence interval on the rate, and (3) determine whether concentrations have met a particular clean up goal. We do no...

... material had been polyvinyl acetate (PVA), a commonly used ... this must be an extremely low sodium glass ... an effective barrier in keeping water out of ...

Long term storage surveillance was conducted on pyrotechnic compositions employing vinyl alcohol acetate resin (VAAR) as a binder. The storage stability of the composition after it had been exposed to ambient and high temperature (167F) storage conditions...

After four years of a long term contraceptive steroid safety study, the incidence and the histologic type of mammary dysplasia produced is similar in beagles treated with medroxyprogesterone acetate (medroxyprogesterone) or progesterone. Serum insulin, th...

A process for continuously glycerinizing and drying cellulose acetate (CA) membranes has been developed and demonstrated. The process produces no change in membrane transport properties and the dry membrane has exhibited good long term storage stability o...

During long-term exposure of photovoltaic modules to environmental stress, the ingress of water into the module is correlated with decreased performance. By using diffusivity measurements for water through encapsulants such as ethylene vinyl acetate (EVA)...

a blender (Polytoron; Kinematica, Lit- tau, Switzerland). The mixture was supplemented with acetic acid is crucial for develop- mental elimination of redundant CF synapses, long-term depres- sion, and motor

A methyl acetate reactor was developed to perform a subscale kinetic investigation in the design and optimization of a full-scale metabolic simulator for long term testing of life support systems. Other tasks in support of the closed ecological life suppo...

PKC, a phorbol ester receptor, copurified with specific binding sites of ({sup 3}H)phorbol-12,13,-dibutyrate (({sup 3}H)PDBu). The specific binding of ({sup 3}H)PDBu to intact cells was saturable to a single class of binding sites. The PKC and phorbol ester receptors in N1E-115 cells can be down regulated by prolonged phorbol ester incubation. Phorbol 12-myristate 13-acetate ...

Method of measuring soil bulk density or weight: Gamma ray attenuation and using undisturbed soil cores (see publications by Ball and others and by Sullivan in reference list) ... samples by mass spectrometry (See Smith, Howard & ...

The primary hazard associated with uranium mill tailings is exposure to a radioactive gas, radon-222, the concentration of which has been correlated with the occurrence of lung cancer. Previous studies on radon attenuation conclude that the placement of e...

The primary hazard associated with uranium mill tailings is exposure to a radioactive gas, 222 Rn, the concentration of which has been correlated with the occurrence of lung cancer. Previous studies on radon attenuation conclude that the placement of eart...

Long-term monitoring of a large trichioroethylene (TCE) and 1,1,1-trichloroethane (TCA) ground water plume in Minnesota indicated that these contaminants attenuated with distance from the source. Mathematical modelling indicated that sufficient time had passed for the plume to fu...

The long term objective of this study is to improve functional outcome following traumatic brain injury (TBI) by enhancing mechanisms which are neuroprotective. This study investigates the role of neurotrophic factors in attenuating neuronal injury after ...

Bit error rate (BER) bench testing of digital radios in a back-to-back mode determines hardware characteristics independent of external anomalies such as impulse noise, fading, and interfering signals. This method employs the statistic of a characteristic theoretical curve of a long term BER versus received signal level (RSL). The ...

In the past two years a number of changes have been made to the Main Ring Magnet Power Supply System to improve current regulation and long term drift. Some of the modifications discussed include new computers, new passive filters, direct analog feedback, a voltage-to-frequency converter for bend bus regulation, and a ...

Ribosomal protein S6 kinase activity was measured in lysates prepared from serum-deprived chicken embryo fibroblasts (CEF) treated for various times with phorbol 12-myristate 13-acetate (PMA). Maximal activity was observed within 15 min, and it declined to the initial level by 4 hr. Incubation of these cells with PMA 4-60 hr after the initial treatment did not result in an ...

Ribosomal protein S6 kinase activity was measured in lysates prepared from serum-deprived chicken embryo fibroblasts (CEF) treated for various times with phorbol 12-myristate 13-acetate (PMA). Maximal activity was observed within 15 min, and it declined to the initial level by 4 hr. Incubation of these cells with PMA 4-60 hr after the initial treatment did not result in an ...

Two methods are described to obtain long-term (20 years and longer) distributions of 5-minute point rain rates from data published by the National Climatic Center for U.S. locations. A set of simple empirical formulas for converting the distribution of 5-minute rain rates into rain attenuation distributions on 11-GHz radio paths has been deduced from data ...

Long term intake of coffee is known to produce anxiety and suppression of appetite. 5- hydroxytryptamine (5-HT) acting via 5-HT-2C receptors elicits anorexia and anxiety. The present study is design to monitor metachloro phenyl piperazine (m-CPP) at a dose of 3mg/ml/kg, induces hypophagia and hypolocomotion in rats taking a solution of caffeine (a ...

Based on our previous findings in day-old chicks with prenatal morphine-treated, embryonic days 5-8 is crucial for functional development of learning and memory, the underlying structure and cellular mechanisms were further explored. The prenatal morphine-exposed chicks showed deficits in passive avoidance learning and conditioned place preference, and attenuation in ...

The role of auxin in controlling leaf expansion remains unclear. Experimental increases to normal auxin levels in expanding leaves have shown conflicting results, with both increases and decreases in leaf growth having been measured. Therefore, the effects of both auxin application and adjustment of endogenous leaf auxin levels on midrib elongation and final leaf size (fresh weight and area) were ...

A summary of some of the measurements carried out at the Post Office Research Center during 1975 to 1976 using the 20 and 30 GHz linearly polarized transmissions from the ATS 6 satellite is presented. The measurement of attenuation ratio between the two frequencies and depolarization measurements at 20 GHz are presented. Calibration of 20 and 30 GHz radiometers directed along ...

Natural attenuation may be an attractive alternative to more expensive remediation technologies at sites that meet well-defined selection criteria, acceptable risk levels, and that satisfy specific regulatory concerns. Environmental remediation technology is necessarily evolving toward less expensive, less intrusive, long-term solutions. Natural ...

The ovarian steroid hormones estradiol and progesterone regulate a wide variety of non-reproductive functions in the central nervous system by interacting with molecular and cellular processes. A growing literature from studies using rodent models suggests that 17?-estradiol, the most potent of the biologically relevant estrogens, enhances synaptic transmission and the magnitude of long-term ...

Over the last several years, a number of field-scale experiments have been conducted at contaminated sites in an effort to immobilize metals and radionuclides as a remediation approach. The underlying processes for immobilization range from changing redox status of metals, to incorporation of radionuclides into precipitated phases, to enhanced sorption on residual biomass. Approaches include both ...

Contents: Preface and Acknowledgments; Long Term Care: Description and Definition; The Growing Need for Long Term Care; Home and Community-Based Long Term Care Services; The Recipients of Long Term Care; The Providers of ...

Over the last 20 years a large body of evidence has demonstrated that in chronic renal failure there is progressive chronic inflammation, which increases after the start of dialysis. In this phase a fundamental role is played by bioincompatibility reactions induced by contact with the different dialysis materials: membranes, plastic lines, dialysis fluids as well as contaminants present in water. ...