Atmosphere Exposure Chambers: Experimental devices used in inhalation studies in which a person or animal is either partially or completely immersed in a chemically controlled atmosphere.Inhalation Exposure: The exposure to potentially harmful chemical, physical, or biological agents by inhaling them.Atmosphere: The gaseous envelope surrounding a planet or similar body. (From Random House Unabridged Dictionary, 2d ed)Toluene: A widely used industrial solvent.Aerosols: Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents.Air Pollutants: Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or material. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS.Equipment Design: Methods of creating machines and devices.Lung: Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.Anterior Chamber: The space in the eye, filled with aqueous humor, bounded anteriorly by the cornea and a small portion of the sclera and posteriorly by a small portion of the ciliary body, the iris, and that part of the crystalline lens which presents through the pupil. (Cline et al., Dictionary of Visual Science, 4th ed, p109)Time Factors: Elements of limited time intervals, contributing to particular results or situations.Unconsciousness: Loss of the ability to maintain awareness of self and environment combined with markedly reduced responsiveness to environmental stimuli. (From Adams et al., Principles of Neurology, 6th ed, pp344-5)Consciousness: Sense of awareness of self and of the environment.Consciousness Disorders: Organic mental disorders in which there is impairment of the ability to maintain awareness of self and environment and to respond to environmental stimuli. Dysfunction of the cerebral hemispheres or brain stem RETICULAR FORMATION may result in this condition.Decompression Sickness: A condition occurring as a result of exposure to a rapid fall in ambient pressure. Gases, nitrogen in particular, come out of solution and form bubbles in body fluid and blood. These gas bubbles accumulate in joint spaces and the peripheral circulation impairing tissue oxygenation causing disorientation, severe pain, and potentially death.Death, Sudden, Cardiac: Unexpected rapid natural death due to cardiovascular collapse within one hour of initial symptoms. It is usually caused by the worsening of existing heart diseases. The sudden onset of symptoms, such as CHEST PAIN and CARDIAC ARRHYTHMIAS, particularly VENTRICULAR TACHYCARDIA, can lead to the loss of consciousness and cardiac arrest followed by biological death. (from Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 7th ed., 2005)Sudden Infant Death: The abrupt and unexplained death of an apparently healthy infant under one year of age, remaining unexplained after a thorough case investigation, including performance of a complete autopsy, examination of the death scene, and review of the clinical history. (Pediatr Pathol 1991 Sep-Oct;11(5):677-84)Decompression: Decompression external to the body, most often the slow lessening of external pressure on the whole body (especially in caisson workers, deep sea divers, and persons who ascend to great heights) to prevent DECOMPRESSION SICKNESS. It includes also sudden accidental decompression, but not surgical (local) decompression or decompression applied through body openings.Inert Gas Narcosis: Progressive mental disturbances and unconsciousness due to breathing mixtures of oxygen and inert gases (argon, helium, xenon, krypton, and atmospheric nitrogen) at high pressure.Nitrogen: An element with the atomic symbol N, atomic number 7, and atomic weight [14.00643; 14.00728]. Nitrogen exists as a diatomic gas and makes up about 78% of the earth's atmosphere by volume. It is a constituent of proteins and nucleic acids and found in all living cells.Hyperbaric Oxygenation: The therapeutic intermittent administration of oxygen in a chamber at greater than sea-level atmospheric pressures (three atmospheres). It is considered effective treatment for air and gas embolisms, smoke inhalation, acute carbon monoxide poisoning, caisson disease, clostridial gangrene, etc. (From Segen, Dictionary of Modern Medicine, 1992). The list of treatment modalities includes stroke.Airway Resistance: Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow.Oxygen: An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.Submarine Medicine: The field of medicine concerned with conditions affecting the health of people in submarines or sealabs.Menopause: The last menstrual period. Permanent cessation of menses (MENSTRUATION) is usually defined after 6 to 12 months of AMENORRHEA in a woman over 45 years of age. In the United States, menopause generally occurs in women between 48 and 55 years of age.Abscess: Accumulation of purulent material in tissues, organs, or circumscribed spaces, usually associated with signs of infection.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Penis: The external reproductive organ of males. It is composed of a mass of erectile tissue enclosed in three cylindrical fibrous compartments. Two of the three compartments, the corpus cavernosa, are placed side-by-side along the upper part of the organ. The third compartment below, the corpus spongiosum, houses the urethra.Toxicity Tests: An array of tests used to determine the toxicity of a substance to living systems. These include tests on clinical drugs, foods, and environmental pollutants.Fertility: The capacity to conceive or to induce conception. It may refer to either the male or female.No-Observed-Adverse-Effect Level: The highest dosage administered that does not produce toxic effects.Formularies as Topic: Works about lists of drugs or collections of recipes, formulas, and prescriptions for the compounding of medicinal preparations. Formularies differ from PHARMACOPOEIAS in that they are less complete, lacking full descriptions of the drugs, their formulations, analytic composition, chemical properties, etc. In hospitals, formularies list all drugs commonly stocked in the hospital pharmacy.Triazines: Heterocyclic rings containing three nitrogen atoms, commonly in 1,2,4 or 1,3,5 or 2,4,6 formats. Some are used as HERBICIDES.Particle Size: Relating to the size of solids.Nebulizers and Vaporizers: Devices that cause a liquid or solid to be converted into an aerosol (spray) or a vapor. It is used in drug administration by inhalation, humidification of ambient air, and in certain analytical instruments.Administration, Inhalation: The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract.Powders: Substances made up of an aggregation of small particles, as that obtained by grinding or trituration of a solid drug. In pharmacy it is a form in which substances are administered. (From Dorland, 28th ed)Ctenocephalides: A genus of FLEAS in the family Pulicidae. It includes the cat flea (Ctenocephalides felis), one of the most common species on earth.Flea Infestations: Parasitic attack by members of the order SIPHONAPTERA.Nitro Compounds: Compounds having the nitro group, -NO2, attached to carbon. When attached to nitrogen they are nitramines and attached to oxygen they are NITRATES.Permethrin: A pyrethroid insecticide commonly used in the treatment of LICE INFESTATIONS and SCABIES.Insecticides: Pesticides designed to control insects that are harmful to man. The insects may be directly harmful, as those acting as disease vectors, or indirectly harmful, as destroyers of crops, food products, or textile fabrics.Guanidines: A family of iminourea derivatives. The parent compound has been isolated from mushrooms, corn germ, rice hulls, mussels, earthworms, and turnip juice. Derivatives may have antiviral and antifungal properties.Dog Diseases: Diseases of the domestic dog (Canis familiaris). This term does not include diseases of wild dogs, WOLVES; FOXES; and other Canidae for which the heading CARNIVORA is used.Sweat: The fluid excreted by the SWEAT GLANDS. It consists of water containing sodium chloride, phosphate, urea, ammonia, and other waste products.Solubility: The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)United States Food and Drug Administration: An agency of the PUBLIC HEALTH SERVICE concerned with the overall planning, promoting, and administering of programs pertaining to maintaining standards of quality of foods, drugs, therapeutic devices, etc.Perfume: A substance, extract, or preparation for diffusing or imparting an agreeable or attractive smell, especially a fluid containing fragrant natural oils extracted from flowers, woods, etc., or similar synthetic oils. (Random House Unabridged Dictionary, 2d ed)Carbon Compounds, Inorganic: Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons.Silicon Compounds: Inorganic compounds that contain silicon as an integral part of the molecule.Limit of Detection: Concentration or quantity that is derived from the smallest measure that can be detected with reasonable certainty for a given analytical procedure.MethylaminesSocieties, Scientific: Societies whose membership is limited to scientists.Artemisia absinthium: A plant species of the genus ARTEMISIA, family ASTERACEAE that has been used in ABSINTHE. The oil contains neurotoxic 1-thujone and d-isothujone.Public-Private Sector Partnerships: An organizational enterprise between a public sector agency, federal, state or local, and a private sector entity. Skills and assets of each sector are shared to deliver a service or facility for the benefit or use of the general public.Materials Testing: The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.

Cough frequency and cough receptor sensitivity to citric acid challenge during a simulated ascent to extreme altitude. (1/168)

The aim of this study was to determine the frequency of cough and the citric acid cough threshold during hypobaric hypoxia under controlled environmental conditions. Subjects were studied during Operation Everest 3. Eight subjects ascended to a simulated altitude of 8,848 m over 31 days in a hypobaric chamber. Frequency of nocturnal cough was measured using voice-activated tape recorders, and cough threshold by inhalation of increasing concentrations of citric acid aerosol. Spirometry was performed before and after each test. Subjects recorded symptoms of acute mountain sickness and arterial oxygen saturation daily. Air temperature and humidity were controlled during the operation. Cough frequency increased with increasing altitude, from a median of 0 coughs (range 0-4) at sea level to 15 coughs (range 3-32) at a simulated altitude of 8,000 m. Cough threshold was unchanged on arrival at 5,000 m compared to sea level (geometric mean difference (GMD) 1.0, 95% confidence intervals (CI) 0.5-2.1, p=0.5), but fell on arrival at 8,000 m compared to sea level (GMD 3.3, 95% CI 1.1-10.3, p=0.043). There was no relationship between cough threshold and symptoms of acute mountain sickness, oxygen saturation or forced expiratory volume in one second. Temperature and humidity in the chamber were controlled between 18-24 degrees C and 30-60%, respectively. These results confirm an increase in cough frequency and cough receptor sensitivity associated with hypobaric hypoxia, and refute the hypothesis that high altitude cough is due to the inhalation of cold, dry air. The small sample size makes further conclusions difficult, and the cause of altitude-related cough remains unclear.  (+info)

Acute mountain sickness is not related to cerebral blood flow: a decompression chamber study. (2/168)

To evaluate the pathogenetic role of cerebral blood flow (CBF) changes occurring before and during the development of acute mountain sickness (AMS), peak mean middle cerebral artery flow velocities () were assessed by transcranial Doppler sonography in 10 subjects at 490-m altitude, and during three 12-min periods immediately (SA1), 3 (SA2), and 6 (SA3) h after decompression to a simulated altitude of 4,559 m. AMS cerebral scores increased from 0. 16 +/- 0.14 at baseline to 0.44 +/- 0.31 at SA1, 1.11 +/- 0.88 at SA2 (P < 0.05), and 1.43 +/- 1.03 at SA3 (P < 0.01); correspondingly, three, seven, and eight subjects had AMS. Absolute and relative at simulated altitude, expressed as percentages of low-altitude values (%), did not correlate with AMS cerebral scores. Average % remained unchanged, because % increased in three and remained unchanged or decreased in seven subjects at SA2 and SA3. These results suggest that CBF is not important in the pathogenesis of AMS and shows substantial interindividual differences during the first hours at simulated altitude.  (+info)

Chemoprevention of tobacco smoke-induced lung tumors in A/J strain mice with dietary myo-inositol and dexamethasone. (3/168)

Male A/J strain mice were fed AIN-76A diet supplemented with myo-inositol/dexamethasone (10 g and 0.5 mg/kg diet) or acetylsalicylic acid (300 mg/kg) and exposed for 5 months to a mixture of sidestream and mainstream cigarette smoke at a concentration of 132 mg total suspended particulates/m3. After tobacco smoke exposure, they were allowed to recover for another 4 months in filtered air. In the animals fed AIN-75A diet alone or acetylsalicylic acid, the average number of tumors/lung was 2.1, whereas in the animals given the myo-inositol/dexamethasone diet, the average lung tumor multiplicity was 1.0 (P < 0.05). In animals exposed to filtered air, lung tumor multiplicities were 0.6 for animals fed AIN-76A or myo-inositol/dexamethasone and 1.2 for animals fed acetylsalicylic acid. It was concluded that the combination of myo-inositol and dexamethasone constitutes an effective chemopreventive regimen against tobacco smoke-induced lung tumorigenesis.  (+info)

Biotransformation and kinetics of excretion of methyl-tert-butyl ether in rats and humans. (4/168)

Methyl-tert-butyl ether (MTBE) is widely used as an additive to gasoline to increase oxygen content and reduce tail pipe emission of pollutants. Therefore, widespread human exposure may occur. To contribute to the characterization of potential adverse effects of MTBE, its biotransformation was compared in humans and rats after inhalation exposure. Human volunteers (3 males and 3 females) and rats (5 each, males and females) were exposed to 4 (4.5 +/- 0.4) and 40 (38.7 +/- 3.2) ppm MTBE for 4 h in a dynamic exposure system. Urine samples from rats and humans were collected for 72 h in 6-h intervals, and blood samples were taken in regular intervals for 48 h. In urine, MTBE and the MTBE metabolites tertiary-butanol (t-butanol), 2-methyl-1,2-propane diol, and 2-hydroxyisobutyrate were quantified; MTBE and t-butanol were determined in blood samples. After the end of the exposure period, inhalation of 40 ppm MTBE resulted in blood concentrations of MTBE 5.9 +/- 1.8 microM in rats and 6.7 +/- 1.6 microM in humans. The MTBE blood concentrations after inhalation of 4 ppm MTBE were 2.3 +/- 1.0 in rats and 1.9 +/- 0.4 microM in humans. MTBE was rapidly cleared from blood with a half-life of 2.6 +/- 0.9 h in humans and 0.5 +/- 0.2 h in rats. The blood concentrations of t-butanol were 21.8 +/- 3.7 microM in humans and 36.7 +/- 10.8 microM in rats after 40 ppm MTBE, and 2.6 +/- 0.3 in humans and 2.9 +/- 0.5 in rats after 4 ppm MTBE. In humans, t-butanol was cleared from blood with a half-life of 5.3 +/- 2.1 h. In urine samples from controls and in samples collected from the volunteers and rats before the exposure, low concentrations of t-butanol, 2-methyl-1,2-propane diol and 2-hydroxyisobutyrate were present. In urine of both humans and rats exposed to MTBE, the concentrations of these compounds were significantly increased. 2-Hydroxyisobutyrate was recovered as a major excretory product in urine; t-butanol and 2-methyl-1,2-propane diol were minor metabolites. All metabolites of MTBE excreted with urine were rapidly eliminated in both species after the end of the MTBE exposure. Elimination half-lives for the different urinary metabolites of MTBE were between 7.8 and 17.0 h in humans and 2.9 to 5.0 h in rats. The obtained data indicate that MTBE biotransformation and excretion are similar in rats and humans, and MTBE and its metabolites are rapidly excreted in both species. Between 35 and 69% of the MTBE retained after the end of the exposure was recovered as metabolites in urine of both humans and rats.  (+info)

Absence of prenatal developmental toxicity from inhaled arsenic trioxide in rats. (5/168)

A review of the literature revealed no published inhalational developmental toxicity studies of arsenic performed according to modern regulatory guidelines and with exposure throughout gestation. In the present study, inorganic arsenic, as arsenic trioxide (As(+3), As2O3), was administered via whole-body inhalational exposure to groups of twenty-five Crl:CD(SD)BR female rats for six h per day every day, beginning fourteen days prior to mating and continuing throughout mating and gestation. Exposures were begun prior to mating in order to achieve a biological steady state of As(+3) in the dams prior to embryonal-fetal development. In a preliminary exposure range-finding study, half of the females that had been exposed to arsenic trioxide at 25 mg/m3 died or were euthanized in extremis. In the definitive study, target exposure levels were 0.3, 3.0, and 10.0 mg/m3. Maternal toxicity, which was determined by the occurrence of rales, a decrease in net body weight gain, and a decrease in food intake during pre-mating and gestational exposure, was observed only at the 10 mg/m3 exposure level. Intrauterine parameters (mean numbers of corpora lutea, implantation sites, resorptions and viable fetuses, and mean fetal weights) were unaffected by treatment. No treatment-related malformations or developmental variations were noted at any exposure level. The no-observed-adverse-effect level (NOAEL) for maternal toxicity was 3.0 mg/m3; the NOAEL for developmental toxicity was greater than or equal to 10 mg/m3, 760 times both the time-weighted average threshold limit value (TLV) and the permissible exposure limit (PEL) for humans. Based on the results of this study, we conclude that arsenic trioxide, when administered via whole-body inhalation to pregnant rats, is not a developmental toxicant.  (+info)

Effects of a thirteen-week inhalation exposure to ethyl tertiary butyl ether on fischer-344 rats and CD-1 mice. (6/168)

The 1990 Clean Air Act Amendments require that oxygenates be added to automotive fuels to reduce emissions of carbon monoxide and hydrocarbons. One potential oxygenate is the aliphatic ether ethyl tertiary butyl ether (ETBE). Our objective was to provide data on the potential toxic effects of ETBE. Male and female Fisher 344 rats and CD-1 mice were exposed to 0 (control), 500, 1750, or 5000 ppm of ETBE for 6 h/day and 5 days/wk over a 13-week period. ETBE exposure had no effect on mortality and body weight with the exception of an increase in body weights of the female rats in the 5000-ppm group. No major changes in clinical pathology parameters were noted for either rats or mice exposed to ETBE for 6 (rats only) or 13 weeks. Liver weights increased with increasing ETBE-exposure concentration for both sexes of rats and mice. Increases in kidney, adrenal, and heart (females only) weights were noted in rats. Degenerative changes in testicular seminiferous tubules were observed in male rats exposed to 1750 and 5000 ppm but were not seen in mice. This testicular lesion has not been reported previously for aliphatic ethers. Increases in the incidence of regenerative foci, rates of renal cell proliferation, and alpha2u-globulin containing protein droplets were noted in the kidneys of all treated male rats. These lesions are associated with the male rat-specific syndrome of alpha2u-globulin nephropathy. Increases in the incidence of centrilobular hepatocyte hypertrophy and rates of hepatocyte cell proliferation were seen in the livers of male and female mice in the 5000-ppm group, consistent with a mitogenic response to ETBE. These two target organs for ETBE toxicity, mouse liver and male rat kidney, have also been reported for methyl tertiary butyl ether and unleaded gasoline.  (+info)

Developmental toxicity evaluation of inhaled toluene diisocyanate vapor in CD rats. (7/168)

Mated female CD (Sprague-Dawley) rats, 25/group, were exposed to toluene diisocyanate (TDI) vapor, for six h/day on gestational days (gd) 6 through 15, at 0.00, 0.02, 0.10, or 0.50 p.p.m.. Maternal clinical signs, body weights, and feed and water consumption were recorded throughout gestation. At termination (gd 21), maternal body, gravid uterine, and liver weights were recorded. Corpora lutea were counted, and implantation sites were identified: resorptions and dead and live fetuses. All live fetuses were examined for external alterations. One-half of the live fetuses/litter were examined for visceral (including craniofacial) alterations. The remaining intact fetuses/litter were stained with alizarin red S and examined for ossified skeletal alterations. Maternal toxicity at 0.50 ppm consisted of reduced body weights, body weight gains, feed consumption, and clinical signs of toxicity. Water consumption was unaffected. Gestational parameters exhibited no significant treatment-related changes, including pre- and postimplantation loss, sex ratio/litter, or fetal body weights/litter. Incidences of individual malformations, malformations by category (external, visceral, and skeletal), total malformations, individual external and visceral variations, variations by category, and total variations were unaffected. Of 111 skeletal variants observed, only 1, incidence of poorly ossified cervical centrum 5, was increased at 0.50 ppm, indicating possible minimal fetotoxicity, although it occurred in the absence of any other indications of developmental toxicity. Therefore, exposure to TDI vapor by inhalation, during major organogenesis in CD rats, resulted in maternal toxicity and minimal fetotoxicity at 0.50 ppm no observed adverse effect level (NOAEL) for maternal and developmental toxicity was 0.10 ppm. No treatment-related embryotoxicity or teratogenicity was observed.  (+info)

Two-generation reproductive toxicity study of inhaled toluene diisocyanate vapor in CD rats. (8/168)

Twenty-eight 42-day-old pups/sex/group (F0) were exposed to toluene diisocyanate vapor (TDI; 80% 2,4-TDI, 20% 2,6-TDI) by inhalation at 0.0, 0.02, 0.08, or 0.3 ppm, 6 h/day, 5 days/week, for 10 weeks, then mated within groups for 3 weeks, with exposure 7 days/week during mating, gestation, and lactation. F0 maternal animals were not exposed from gestational day (gd) 20 through postnatal day (pnd) 4; maternal exposures resumed on pnd 5. Twenty-eight weanlings/sex/group continued exposure for 12 weeks (starting on pnd 28) and were bred as described above. F0 and F1 parents and ten F1 and F2 weanlings/sex/group were necropsied, and adult reproductive organs, pituitary, liver, kidneys, and upper respiratory tract (target organs) were evaluated histologically in ten/sex/group. Adult toxicity was observed in both sexes and generations at 0.08 and 0.3 ppm, including occasional reductions in body weights and weight gain, clinical signs of toxicity at 0.08 and 0.3 ppm, and histologic changes in the nasal cavities at 0.02, 0.08, and 0.3 ppm (including rhinitis, a nonspecific response to an irritating vapor, at all concentrations). There was no reproductive toxicity, reproductive organ pathology, or effect on gestation or lactation at any exposure concentration. Postnatal toxicity and reduced body weights and weight gains during lactation occurred only in F2 litters at 0.08 and 0.3 ppm. Therefore, under the conditions of this study, a no observed adverse effect level (NOAEL) was not determined for adult toxicity; the NOAEL for reproductive toxicity was at least 0.3 ppm, and the NOAEL for postnatal toxicity was 0.02 ppm.  (+info)

The vertical diffusion chamber system is used for transport studies on both filter grown cell monolayers and surgically excised tissue sections. The vertical diffusion chamber system consists of six diffusion chambers, a 12-channel gas manifold and a heat block. 14 general types of vertical chambers are currently available: one for use with cells grown on Snapwell™ membrane supports and the others for use with tissue.
West Virginia Universitys new Inhalation Facility will be the home for research and collaborations that measure, identify and discover how the particles we breathe affect our health. Timothy Nurkiewicz, a microvascular physiologist in the School of Medicines Department of Physiology, Pharmacology and Neuroscience, is the director of the new lab.
Physiologic Instruments designs and manufactures instrumentation, Ussing Chamber Systems and Data Acquisition products for studying transport across epithelial barriers. Transepithelial voltage, short-circuit current and resistance are measured using single and multi-channel voltage/current clamps that may be directly connected to Acquire & Analyze for automating data collection and analysis.
I was shocked to learn, from a comment made by a reader of my blog, that Wikipedia does not mention the gas chamber at Dachau. I couldnt believe it. I had to check it out for myself, and sure enough, there is no mention of any gas chambers, of any kind at Dachau, on the…
Soil respiration is the largest C-flux component in the terrestrial carbon (C) cycle, yet in many biomes this flux and its environmental responses are still poorly understood. Several methodological techniques exist to measure this flux, but mostly there remain comparability uncertainties. For example, the closed static chamber (CSC) and the closed dynamic chamber (CDC) systems are widely used, but still require a rigorous comparison. A major issue with the CSC approach is the generally long manual gas sampling periods causing a potential underestimation of the calculated fluxes due to an asymptotic increase in headspace CO2 concentrations. However, shortening the sampling periods of the static chamber approach might provide comparable results to the closed dynamic chamber system. We compared these two different chamber systems using replicated CSC cover boxes and a Li-Cor 8100 CDC system under field conditions, and performed tests on both, mineral and peat soil. Whereas the automated CDC system ...
Article Use of an exposure chamber to maintain aqueous‐phase nanoparticle dispersions for improved toxicity testing in fish. A novel chamber for maintaining aqueous phase dispersions of nanoparticles (NPs) to enable improved toxicity testing in larva...
Beginning on GD 5, groups of 56 time-mated F0 female rats were housed in specially designed reverberation chambers and received whole-body exposures to CDMA-modulated cell phone RFR at power levels of 0 (sham control), 1.5, 3, or 6 W/kg for 7 days per week, continuing throughout gestation and lactation. Exposure was up to 18 hours and 20 minutes per day with continuous cycling of 10 minutes on and 10 minutes off during the exposure periods. There were seven exposure groups per sex, including a shared sham control and three exposure groups for each modulation. At weaning, three males and three females per litter from 35 litters were randomly selected per exposure group for continuation. Weaning occurred on the day the last litter reached PND 21, marking the beginning of the 2-year studies. Groups of 105 male and 105 female F1 offspring continued to receive whole-body exposures to CDMA-modulated cell phone RFR at the same power levels and under the same exposure paradigm, 7 days per week for up to ...
Victoria councillors are calling on the province to provide supervised drug inhalation facilities. Only Coun. Geoff Young opposed the motion brought forward by Coun. Sarah Potts.
The present disclosure is directed to a novel apparatus and novel methods for the separation, characterization, and manipulation of matter. In particular, the invention combines the use of frequency-dependent dielectric and conductive properties of particulate matter and solubilized matter with the properties of the suspending and transporting medium to discriminate and separate such matter. The apparatus includes a chamber having at least one electrode element and at least one inlet and one output port into which cells are introduced and removed from the chamber. Matter carried through the chamber in a fluid stream is then displaced within the fluid by a dielectrophoretic (DEP) force caused by the energized electrode. Following displacement within the fluid, matter travels through the chamber at velocities according to the velocity profile of the chamber. After the matter has transitted through the chamber, it exists at the opposite end of the chamber at a characteristic position. Methods according to
The present disclosure is directed to a novel apparatus and novel methods for the separation, characterization, and manipulation of matter. In particular, the invention combines the use of frequency-dependent dielectric and conductive properties of particulate matter and solubilized matter with the properties of the suspending and transporting medium to discriminate and separate such matter. The apparatus includes a chamber having at least one electrode element and at least one inlet and one output port into which cells are introduced and removed from the chamber. Matter carried through the chamber in a fluid stream is then displaced within the fluid by a dielectrophoretic (DEP) force caused by the energized electrode. Following displacement within the fluid, matter travels through the chamber at velocities according to the velocity profile of the chamber. After the matter has transmitted through the chamber, it exits at the opposite end of the chamber at a characteristic position. Methods according to
Encyclopedia of Jewish and Israeli history, politics and culture, with biographies, statistics, articles and documents on topics from anti-Semitism to Zionism.
HCAECs (Lonza) were cultured in endothelial growth medium (EGM-2 MV) containing endothelial growth factors, 5% FBS, 100 U/mL of penicillin, and 100 μg/mL of streptomycin at 37°C in humidified air (5% CO2). Cells passaged 3 to 5 times and at 80% to 90% confluence were used for this study. For hypoxia studies, confluent HCAECs were exposed to hypoxia (0.1% O2) by incubation in a ProOxC hypoxia chamber system (BioSpherix) at 37°C that subjected the cells to a controlled anoxic gas mixture consisting of N2 and 5% CO2. For reoxygenation and normoxic controls, cells were returned to/incubated in the standard CO2 incubator under normoxic conditions (21% O2, 5% CO2, and 74% N2).. We first examined the effect of hypoxia on Egfl7 expression in HCAECs. Cells were subjected to 0, 3, or 6 hours of hypoxia, and Egfl7 expression was detected by Western immunoblot analysis. We then examined the effect of recombinant human Egfl7 (0.1 to 100.0 ng/mL for 6 or 48 hours, Abnova) on HCAEC total cellular ICAM-1 ...
The Self-Contained Ussing Chambers systems come in single- and dual-channel models and offer many advantages over the Classic design. The single-channel U9926 and dual-channel U2500 are shown above and to the right. Both systems make use of inserts to secure and position the tissue or culture cup within the chamber body.. Chamber bodies (single- and dual-chamber models) consist of chamber-halves which clamp around the insert(s). Each chamber-half has four ports that enter into its respective bath compartment: a voltage electrode port, a current electrode port, an air/gas port, and a solution drain port. Solution warming is provided by pumping heated water through each chamber-half and there are no delicate glass heat exchangers to be broken. The dual-chamber U2500 has the additional feature of including four needle valves for adjusting the air/gas mixture into each individual chamber-half.. ...
A dual chamber aseptic suction collection system and method employing separable blood and collection reservoirs one of which retains withdrawn blood capable of reinfusion into the patient. The collection system provides an automatic sealing mechanism to completely seal the blood reservoir upon detachment from the collection reservoir. The invention furthermore encompasses a method for using the dual chamber system which includes the isolation of collected blood in a sealable container.
Physiologic Instruments designs and manufactures instrumentation, Ussing Chamber Systems and Data Acquisition products for studying transport across epithelial barriers. Transepithelial voltage, short-circuit current and resistance are measured using single and multi-channel voltage/current clamps that may be directly connected to Acquire & Analyze for automating data collection and analysis.
German doctors have successfully implanted insulin-producing cells in a patient with Type 1 diabetes using a specially constructed chamber system that does not require the use of immunosuppresant
An apparatus and method for synthesis and screening of materials are disclosed. According to one aspect of the present invention, a parallel batch reactor for effecting chemical reactions includes a pressure chamber, and a plurality of reaction wells. Each of the reaction wells is in isolatable fluid communication with the pressure chamber such that during a first pressurizing stage of operation, each of the reaction wells can be simultaneously pressurized through common fluid communication with the pressure chamber, and such that during a second reaction stage of operation, each of the reaction wells can be fluidically isolated from at least one other of said plurality of reaction wells.
A continuous flow fluid bed dryer has a dryer housing having a drying chamber and a plenum chamber located beneath the drying chamber. Moist product to be dried is introduced to the drying chamber at a product inlet and proceeds through the drying chamber to a discharge housing. A porous screen partially separates the drying chamber and the plenum chamber. Heated air is introduced into the plenum chamber which then passes through the screen to the drying chamber to dry product in the drying chamber. A shaft extends centrally through the drying chamber and is mounted for slow rotation therein. A plurality of paddles are connected to the shaft. The paddles move about a path of rotation whereby paddle ends sequentially sweep over the surface of the screen. In doing so, the paddles momentarily move product away from the screen permitting a rush of heated into the drying chamber locally fluidizing the bed and further drying the product. The product is treated very gently in the process so as to suffer
An electric insecticidal apparatus comprising a vessel for storing insecticidal solution, which is oriented in a direction in use; a heating chamber in which the vessel is mounted, said heating chamber containing a heating element; a wick for drawing up the insecticidal solution in the vessel, said wick being provided in the vessel such that the insecticidal solution drawn up by the wick is heated and vaporized by the heating element; an inlet provided at a side of the heating chamber for inserting the vessel into the heating chamber, said vessel being laterally inserted into the heating chamber through the inlet by orienting the vessel in the proper direction; and a guide and holding means for guiding the wick to and holding the wick at a predetermined position at the time of insertion of the vessel into the heating chamber such that the wick confronts the heating element of the heating chamber at a predetermined distance from the heating element, which is provided in the heating chamber.
STS-91 , 6/2/1998 , Crew: 6. SUMMARY:. Main engine pressure chamber sensor failed. If it occurred later, logic error may have triggered at RTLS.. EVENT DESCRIPTION:. After the launch of STS-91 on June 2, 1998, a channel A main engine pressure chamber sensor froze. The sensor was disqualified by engine control software when the sensor exceeded allowable limits during the max Q engine throttle down sequence however the sensor remained qualified for engine redline monitoring since the reading was still within reasonableness limits / operational range for the sensor. The channel B sensor and the main engine performed nominally throughout ascent. If an engine problem had occurred, the channel B sensor would have displayed the correct information and indicated the proper corrective action. However, the channel B sensor would have been ignored due to the frozen channel A sensor.. The post-flight inspection revealed that contamination from a seal leak check caused the sensor to freeze. Marshall Space ...
We had an opportunity to walk this years ICFF show and found some new things that were quite impressive. But there was one particular sighting that got us really excited. In 2011, the design duo Salto & Sigsgaard won a design competition under the auspices of the Danish Ministry of Culture to design the furniture for one of the permanent chambers at the United Nations headquarters here in New York, The Trusteeship Council Chamber also referred to as the Finn Juhl Chamber. In connection with this, Onecollection has developed, produced, and delivered a completely new unique and beautiful chair named "Council Chair" designed by Kasper Salto and Thomas Sigsgaard and it made its "public" debut at ICFF (the grand opening of the TCC, was held in the UN on April 25th 2013). The chairs pass on the baton from Finn Juhls iconic design heritage in a sculptural and pleasant direction, which merges shape, color and natural materials. The chairs are a construction of moulded 3D veneer in oak or walnut, ...
We had an opportunity to walk this years ICFF show and found some new things that were quite impressive. But there was one particular sighting that got us really excited. In 2011, the design duo Salto & Sigsgaard won a design competition under the auspices of the Danish Ministry of Culture to design the furniture for one of the permanent chambers at the United Nations headquarters here in New York, The Trusteeship Council Chamber also referred to as the Finn Juhl Chamber. In connection with this, Onecollection has developed, produced, and delivered a completely new unique and beautiful chair named "Council Chair" designed by Kasper Salto and Thomas Sigsgaard and it made its "public" debut at ICFF (the grand opening of the TCC, was held in the UN on April 25th 2013). The chairs pass on the baton from Finn Juhls iconic design heritage in a sculptural and pleasant direction, which merges shape, color and natural materials. The chairs are a construction of moulded 3D veneer in oak or walnut, ...
In one aspect of the present invention a drill bit assembly comprises a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element. The body portion has at least a portion of a reactive jackleg apparatus which has a chamber at least partially disposed within the body portion and a shaft movably disposed within the chamber, the shaft having at least a proximal end and a distal end. The chamber also has an opening proximate the working portion of the assembly.
Union County Chamber member Atrium Health is getting a head start on International Womens Day by celebrating Strong Females in Healthcare. Join Atrium and YOUR Union County Chamber at our Women in Business Connections Event Tuesday, March 3 at Atrium Health, Women & Childrens Center in Monroe, NC. The evening wil...
WWE Monday Night Raw John Cena takes on Shawn Michaels. If the HBK wins, JBL will be entered into the Elimination Chamber at No Way Out.
Former fashion director at Vogue, Lucinda Chambers at London Fashion Week in February 2017.Image: Hunter Abrams/BFA/REX/Shutterstock The inner machinations of Vogue have been a source of intrigue and fascination for many years now. But, one former British Vogue editor just lifted the lid on what its really like to work at Vogue. And, her account […]. Read More ». ...
Recently, physiologic sampling pumps (PSPs), which can adjust their sampling rates in proportion to wearers minute ventilation ((V) over dot(E)), have been proposed to better estimate exposure to airborne contaminants in the workplace. A laboratory evaluation was conducted to compare the performance of a new PSP with a traditional sampling pump (TSP) in an exposure chamber. Fifteen subjects (aged
Looking for online definition of Pressure chamber in the Medical Dictionary? Pressure chamber explanation free. What is Pressure chamber? Meaning of Pressure chamber medical term. What does Pressure chamber mean?
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A mobile whole-body exposure system was developed for exposing mice to concentrated ambient particulate matter smaller than 2.5 microm in mass median aerodynamic diameter (MMAD). Each 20-L exposure cage was designed to hold 9 mice within individual compartments. This allowed for transport and subsequent exposure. Airflow mixing and the potential for stagnant areas within the compartments were modeled using computational fluid dynamic modeling (CFD). CFD analysis showed no stagnant areas and good mixing throughout the exposure cage. The actual performance of the exposure system was determined for 0.5 to 2.0 microm diameter aerosols by measuring (1) uniformity of aerosol distribution and (2) particle deposition in the tracheobronchial and pulmonary regions of mice exposed in the system. A 0.6-microm MMAD (GSD=2.0) cigarette smoke aerosol was used to experimentally measure the uniformity of aerosol distribution to the nine individual compartments. The average data from three runs showed no statistically
TY - JOUR. T1 - Effect of simulated altitude erythrocythemia in women on hemoglobin flow rate during exercise. AU - Robertson, R. J.. AU - Gilcher, R.. AU - Metz, K. F.. AU - Caspersen, C. J.. AU - Allison, T. G.. AU - Abbott, R. A.. AU - Skrinar, G. S.. AU - Krause, J. R.. AU - Nixon, P. A.. PY - 1988. Y1 - 1988. N2 - The effect of simulated altitude erythrocythemia on hemoglobin flow rate and maximal O 2 uptake (V̇O(2max)) was determined for nine women sea-level residents. Test conditions included normoxia and normobaric hypoxia (16% O 2-84% N 2). Cycle tests were performed under normoxia (T 1-N) and hypoxia (T 1-H) at prereinfusion control and under hypoxia 48 h after a placebo infusion (T 2-H) and 48 h after autologous infusion of 334 ml of erythrocytes (T 3-H). Hematocrit (38.1-44.9%) and hemoglobin concentration (12.7-14.7 g·dl -1) increased from control to postreinfusion. At peak exercise, V̇O(2max) decreased from T 1-N (2.40 l·min -1) to T 1-H (2.15 l·min -1) then increased at T 3-H ...
Man-made microwave and radiofrequency (RF) radiation technologies have been steadily increasing with the growing demand of electronic appliances such as microwave oven and cell phones. These appliances affect biological systems by increasing free radicals, thus leading to oxidative damage. The aim of this study was to explore the effect of 2.45 GHz microwave radiation on histology and the level of lipid peroxide (LPO) in Wistar rats. Sixty-day-old male Wistar rats with 180 ± 10 g body weight were used for this study. Animals were divided into two groups: sham exposed (control) and microwave exposed. These animals were exposed for 2 h a day for 35 d to 2.45 GHz microwave radiation (power density, 0.2 mW/cm2). The whole-body specific absorption rate (SAR) was estimated to be 0.14 W/kg. After completion of the exposure period, rats were sacrificed, and brain, liver, kidney, testis and spleen were stored/preserved for determination of LPO and histological parameters. Significantly high level of LPO ...
The chronic toxicity of a combination of nitrous-oxide (10024972) (N2O) and halothane (151677) was investigated in rats. Male and female Fischer-344 rats were exposed to N2O and halothane mixtures in inhalation chambers, 7 hours/day, 5 days/week for 104 weeks. Group 1 was control group exposed only to room air, group 2 was exposed to 50 parts per million (ppm) N2O and 1ppm halothane, and group 3 w
MILWAUKEE, April 17 /PRNewswire/ -- Aurora St. Lukes Medical Centers new hyperbaric chamber will triple the hospitals capacity to treat patients with hyperbaric oxygen therapy and improve its regional wound care services. (Photo: http://www.newscom.com/cgi-bin/prnh/20080417/AQTH107) The 52-foot-long, 66-ton chamber, the second-largest in the U.S. and the largest in Wisconsin, will be able to treat up to 24 patients at one time. The chamber was installed today after being lifted by a huge crane and placed into the basement of Aurora St. Lukes through a 1,100-square-foot hole. Hyperbaric chambers are primarily used to help treat difficult wounds, such as diabetic foot ulcers, but also are used for carbon monoxide poisoning and a host of other medical conditions. During hyperbaric treatment, patients breathe 100 percent oxygen in a pressurized chamber. The increased oxygen in the blood stimulates small blood vessel and skin growth and helps fight infection. "This new chamber will allow us to ...
General, the Hyperbaric Chamber has been found to improve many situations and diseases. Cerebral palsey is amongst these. Most of the signs have been lessened and even eradicated by strategic use of the Hyperbaric Chambers. Brain harm from head accidents and even strokes have been found to be reversed from the usage of the hyperbaric oxygen chambers. The oxygen thats saturated into the physique targets harmed and broken tissues. This aids those tissues, even within the brain, to change into productive and functioning once again ...
Between the 10th and 12th August, many of the the most influential names in the world of Hyperbaric Medicine gathered at the eighth IHMA HBOT 2012 conference in Long Beach, California. Distinguished speakers , including Prof. Paul G Harch MD, Prof. Philip James MD, Kenneth Stoller MD, and James Wright MD, who all gave presentations that provided further empirical evidence for the benefits of hyperbaric oxygen treatment and advancements in Oxygen Therapy perspectives.. A presentation by James Wright MD USAF (Rtd.) instigated the use of the SOS Hyperlite hyperbaric chambers for the transportation of casualties from the battlefront to the nearest available medical facility. The paper investigated the benefits of immediate hyperbaric oxygen treatment and provided evidence to suggest that the availability of on-scene hyperbaric chambers for immediate treatment or transfer-under-pressure capabilities would provide a capability to oxygenate wounds rapidly thus preventing hypoxia. The availability of a ...
Three crossover experiments (each randomized, balanced with regard to order, and separated by appropriate washout interval) will expose healthy subjects to well-characterized DEP in two-hour sessions in an inhalation chamber system mimicking ambient particulate matter from contemporary diesel engines.. First, 24 subjects will be exposed to DEP at each of three concentrations [0 (filtered air, FA), 100, or 200 µg/m3], and endothelial function will be assessed post-exposure through ultrasonographic measurement of endothelial-dependent flow-mediated vasodilation of the brachial artery, plasma markers of endothelial homeostasis (endothelin-1, ICAM-1, e-selectin, NO3-/NO2-, IL-6, and TNF-a), and markers of thrombosis associated with endothelial activation (PAI-1, D-dimer, and VWF).. Second, 10 subjects will be exposed to FA or DEP at 200 µg/m3 and then monitored intensively in the clinical research center for evidence of systemic oxidative stress using serial assessment of markers in plasma ...
The hydroxyl free radical (OH) is the major oxidizing species in the lower atmosphere. Measuring the OH concentration is generally difficult and involves elaborate, expensive, custom-made experimental setups. Thus other more economical techniques, capable of determining OH concentrations at environmental chambers, would be valuable. This work is based on an indirect method of OH concentration measurement, by monitoring an appropriate OH tracer by proton transfer reaction mass spectrometry (PTR-MS). 3-pentanol, 3-pentanone and pinonaldehyde (PA) were used as OH tracers in α-pinene (AP) secondary organic aerosol (SOA) aging studies. In addition we tested butanol-d9 as a potential "universal" OH tracer and determined its reaction rate constant with OH: k butanol-d9 = 3.4(±0.88) × 10 -12 cm 3 molecule -1 s -1. In order to make the chamber studies more comparable among each other as well as to atmospheric measurements we suggest the use of a chemical (time) dimension: the OH clock, which ...
Influence of A Thermogenic Dietary Supplement on Safety Markers, Body Composition, Energy Expenditure, Muscular Performance and Hormone Concentrations: A Randomized, Placebo-Controlled, Double-Blind Trial
Influence of A Thermogenic Dietary Supplement on Safety Markers, Body Composition, Energy Expenditure, Muscular Performance and Hormone Concentrations: A Randomized, Placebo-Controlled, Double-Blind Trial
DIDAC EXPORT - Exporter, Manufacturer, Distributor & Supplier of Environmental Chambers For Universal Testing Machines UTM based in New Delhi, India
Democratic lawmakers accused Gov. Arnold Schwarzenegger of hiding from the public his plans to build a new execution chamber at San Quentin State Prison in a legislative hearing Tuesday in which the governors top prison official admitted the controversial project would cost twice as much as first estimated. While a Schwarzenegger spokesman and Corrections Secretary Jim Tilton said the administration wanted to quickly build a new execution chamber to meet a federal judges concerns, lawmakers suggested a deliberate attempt to keep the project secret. Fogel listed numerous problems with capitol punishment protocol, including concerns over the drug cocktail the state used, the training of staff, and the dimly lit and cramped space inside the lime-green death chamber at San Quentin.
5 p.m. the first and third Tuesdays of the month in Commission Chambers at the Administrative Office Complex, 601 N. Laurel St., Springfield. For a complete agenda, go to effinghamcounty.org.. School board. The Effingham County Board of Education meets at 2 p.m. the first Wednesday and at 7 p.m. the third Thursday of the month in the conference room at the Central Office Complex, 405 N. Ash St., Springfield. Agendas and minutes of past meetings can be found at effinghamschools.com. For information, call 754-6491.. County planning board. The Effingham County Planning Board meets at 7 p.m. the fourth Monday of the month in Commission Chambers at the County Administrative Complex, 601 N. Laurel St., Springfield. Agendas and minutes can be found at effinghamcounty.org. For information, call 754-2105.. Elections board. The Effingham County Board of Elections and Registration meets at 8:30 a.m. the second Monday of the month in the conference room at the elections office, 284 Ga. 119 S., Springfield. ...
7 p.m. the fourth Monday of the month in Commission Chambers at the County Administrative Complex, 601 N. Laurel St., Springfield. Agendas and minutes can be found at effinghamcounty.org. For information, call 754-2105.. Elections board. The Effingham County Board of Elections and Registration meets at 8:30 a.m. the second Monday of the month in the conference room at the elections office, 284 Ga. 119 S., Springfield. Agendas and minutes of past meetings are not currently available online. For information, go to effinghamcounty.org or call 754-8030.. Guyton council. The Guyton City Council meets at 7 p.m. the second Tuesday of the month and at 8 a.m. the fourth Tuesday of the month at City Hall, 310 Central Blvd., Guyton. Agendas and minutes of past meetings are not currently available online. For information, go to cityofguyton.com or call City Hall at 722-3353.. Springfield council. The Springfield City Council meets at 6 p.m. the second and fourth Tuesdays of the month in Council Chambers at ...
Rats and mice were exposed for periods of up to six months and two successive generations of mice were raised in a ground-level chamber system filled with 80% helium −20% oxygen, at 24°C. A duplicate...
This unit describes the setup of flow chamber systems for the study of microbial biofilms, and methods for the analysis of structural biofilm formation
The headline numbers from the Chambers study are derived from a fictional scenario that does not reflect any current proposals or realistic plans to achieve our climate goals.. By design, the Chamber study intentionally imposes the most stringent greenhouse gas regulations on the sectors that would face the highest costs per ton of GHG reduction.. This scenario greatly exaggerates the likely costs of any future program to achieve the economy-wide reductions set forth in the Paris Agreement, because any real program to meet those goals would be designed with cost-saving flexibility the Chamber deliberately left out.. The public-facing summary also neglects to mention that the report actually analyzed a wide range of scenarios, including one that allowed for a market-based, economy-wide approach. In that scenario, the report finds that the Paris goals can actually be achieved at much lower costs than the headline numbers suggest.. Although even that scenario still inflates costs (as well discuss ...
EDITORS NOTE: This is Tom Christensens first-person account of his visits to the hyperbaric chambers. It was a scary day for me and my wife as we made our way down the hall at McKay-Dee Hospital to...
It is well established that strong electromagnetic fields (EMFs) can give rise to acute health effects, such as burns, which can be effectively prevented by respecting exposure guidelines and regulations. Current concerns are instead directed toward the possibility that long-term exposure to weak EMF might have detrimental health effects due to some biological mechanism, to date unknown. (1) The possible risk due to pulsed EMF at frequency 2.45 GHz and mean power density 2.8 mW/cm(2) on rat postnatal neurogenesis was studied in relation to the animal's age, duration of the exposure dose, and post-irradiation survival. (2) Proliferating cells marker, BrdU, was used to map age- and dose-related immunohistochemical changes within the rostral migratory stream (RMS) after whole-body exposure of newborn (P7) and senescent (24 months) rats. (3) Two dose-related exposure patterns were performed to clarify the cumulative effect of EMF: short-term exposure dose, 2 days irradiation (4 h/day), versus ...
Base station mobile phone antennas, which are often placed on building rooftops, represent a source of occupational exposure to electromagnetic field (EMF) to professionals who have to work in close proximity to the antennas. Examples of such workers include firemen, construction workers, janitors and many other professionals. The specific exposure systematic measurement data for antenna models for the unperturbed fields and the specific absorption rates (SARs) in close proximity (,1m) are still unavailable. The ICNIRP occupational limits consist of the basic restrictions of local SAR as an average whole-body exposure. However, in the very inhomogeneous near field of an antenna, the local exposure is more relevant than who-body average exposure. Objectives ...
Pregnant mice were assigned to the following groups: sham-exposed CDMA control mice (group 1); CDMA exposed mice (group 2); sham-exposed CDMA+WCDMA control mice (group 3); CDMA+WCDMA exposed mice (group 4). Whole-body exposures to CDMA (849 MHz) and WCDMA (1.95 GHz) at SAR of 2.0 W/kg were conducted for two 45 minute periods separated by a 15 minute interval, daily, throughout the gestation period (days 1-17). On gestation day 18, the mice were sacrificed; the uterine contents and ovaries were examined for the number of implantation sites, number of resorptions, sex and number of viable fetuses, fetal head and body size, external abnormalities, number of dead fetuses, fetal and placental weights. One-half of the live fetuses per litter were examined for visceral malformations and the other half - for skeletal malformations. Results ...
I had heard a lot about Cryotherapy so when a friend told me about Cryo Elite Therapy in Buckhead I had to give it a try. Located inside Buckhead Elite Training center (just up the street from Piece of Cake bakery-how fitting) CryoEliteTherapy is a whole-body exposure to subzero temperatures to decrease inflammation, stimulate weight. Read More. ...
Sigma-Aldrich offers abstracts and full-text articles by [Maria Sehlstedt, Rosamund Dove, Christoffer Boman, Joakim Pagels, Erik Swietlicki, Jakob Löndahl, Roger Westerholm, Jenny Bosson, Stefan Barath, Annelie F Behndig, Jamshid Pourazar, Thomas Sandström, Ian S Mudway, Anders Blomberg].
A method of cleaning a surface of an object is disclosed. The object is placed onto a support region within a pressure chamber. The pressure chamber is then pressurized. A cleaning process is performed. A series of decompression cycles are performed. The pressure chamber is then vented.
RESULTS During a flight (200 mmHg pressure decrease), excess insulin delivery of 0.623% of the cartridge volume occurred (P , 0.001, Student t test). In hypobaric chamber studies, bubbles developed in the insulin when the pressure decreased and displaced the insulin out of the cartridge. Pre-existing bubbles changed in size consistent with Boyle law. Cartridge plunger movement did not occur in normal flight conditions but did occur when catastrophic plane depressurization was mimicked. ...
PURPOSE: To analyze and to evaluate the effect of the hyperbaric hyperoxygenation in the mechanical resistance of ischemic colon of rats. METHODS: Eighty rats, distributed in four groups of 20 animals in each one, were used. In group 1 (G1), the control group, ischemia was not caused. Group 2 was submitted to the lesser degree of ischemia. Group 3 was submitted to the intermediate degree of ischemia. In group 4, a bigger degree of intestinal ischemia was provoked. Each group was divided in two sub-groups often animals each: with hyperbaric chamber (CC) and without hyperbaric chamber (SC). The animals of the four CC subgroups were placed in an experimental hyperbaric chamber in order to inhale oxygen at 100%, at two Absolute Atmospheres, for 120 minutes, for a four-day consecutive period. The animals of the four SC subgroups were kept in environment air during the five days of the experiment. All animals have been submitted to the mechanical study of the intestinal loop by the pressure test of ...
A new environmental chamber constructed by Argonne National Laboratory allows researchers to watch materials as they grow step-by-step while interacting in elevated-temperature, reactive-gas environments.
Environmental Chamber for testing with the Vantage Series Tensile Testers from Thwing-Albert. Hot or Cold applications available for materials testing.
This study tested glycerol hyperhydration against water hyperhydration on the ability to reduce cardiovascular and thermal strain and improve performance when Ss ran a set distance as quickly as possible. It was hypothesized that compared with water hyperhydration, glycerol hyperhydration would result in: a) greater fluid retention, b) no differences in heart rates and core temperatures, and c) decreased run time performances. Male endurance trained runners (N = 6) completed a treadmill run in an environmental chamber at a self-selected pace, estimated to take one hour. Temperature was set at 30 C with 50% relative humidity. Beginning 2.5 hours before exercise, glycerol was given at 1.2 g/kgBW with a total fluid ingestion of 26 ml/kgBW. The placebo condition involved ingesting water of an equal amount. Runners ingested up to 500 ml during the run and were unable to see their elapsed time or chosen speed; only distance covered.. Fluid retention and time to complete the run were no different ...
Clouds in clean air have low aerosol concentration and are composed of a small number of large droplets. They do not scatter light well and are somewhat dark and translucent. Much of the Suns radiation passes through these clouds and reaches the surface.. Clouds in polluted air have much higher aerosol concentration. As aerosol concentration increases within a cloud, the water in the cloud is divided into a larger number of smaller droplets, scattering more light and becoming more reflective. These clouds appear brighter which blocks sunlight from reaching the Earths surface, shading the planet and producing net cooling. This is the "cloud albedo effect." These clouds also last longer since smaller cloud droplets are less likely to fall out of the atmosphere as rain. Both effects increase the amount of radiation from the Sun that is reflected to space without reaching the surface.. According to NASA, aerosols and the clouds seeded by them reflect about 25% of the Suns radiation back to space. ...
A method for cleaning dirty objects using cleaning fluid and rinsing fluid and an apparatus using the method. The method has consecutive steps of spraying the surface of a dirty object with high pressure spray of cleaning fluid, immersing the dirty object in an immersion chamber containing cleaning fluid, spraying additional cleaning fluid at high pressure into the immersion chamber at a location downstream from the initial location where the dirty object is immersed to turbulate cleaning fluid therein to scrub the surface of the dirty object, removing the dirty object from the immersion chamber, and spraying the surface of the dirty object with a high pressure spray of rinsing fluid.
Thats not an unreasonable idea about the altitude. If that were the case, I wonder if treating the pigs in a hypobaric chamber would do anything? I dont even know if those exist but it seems like you could use the same hyperbaric chambers that divers and mountain climbers use but instead pump the pressure in lower than 1atm (760mmHg). No clue if you could do something like that as a treatment or if it would have to be a permanent living condition. Ill have to think through the physiology on that one. It just strikes me as very reasonable. Plus, Im procrastionating today, as usual ...
Tuesday: "Marketing Yourself - Being Seen and Heard," Greater Wilkes-Barre Chambers Women in Business Luncheon, 11:30 a.m. to 1:15 p.m., Ruths Chris at Mohegan Sun, Plains Twp. Event registration begins at 11:30. Cost is $20 for chamber members and $25 for non-members. Reservations are required. For more information, call 570-823-2101 ext. 149 or email [email protected] ■ "Be Awesome: How to Motivate & Energize You & Your Employees" seminar by the Greater Hazleton Chamber of Commerce, May 13, 8:15 to 10:30 a.m., Top of the 80s Restaurant, 3 Top of the 80s Road, Hazleton. Registration is $25 for chamber members and $30 for non chamber members. Continental breakfast will be provided. Registration is required online at www.hazletonchamber.org or by contacting the Chamber at 455-1509 or [email protected] Saturday: Food for Profit workshop, 9 a.m. to 4:30 p.m., Penn State Extension, Monroe County Office, 724 Phillips St., Stroudsburg. The cost is $45, and includes all materials ...
Darwin Chambers provides Environmental Chamber Calibration, Testing, Repair and Installation services in Charlotte, NC. Our Environmental Chamber Engineers can ensure that your environmental chamber is operating at peak capacity in Charlotte.
These calibrations are performed in a thermal vacuum chamber at the instrument calibration contractors site (TNO/TPD).. Other measurements include comprehensive instrument characterisation and consistency cross checks. In particular, full radiance and irradiance calibration using Earth and sun observation paths are performed with NIST calibrated light sources for the Polarisation Unit (PU) and the main channels.. Additional calibration includes:. ...
Solvent cement the 1" diameter short pipe and ring into the bored hole in the large pressure chamber endcap. NOTE - after 9/15/05 this short pipe is supplied using the stronger schedule 80 material. It is dark grey rather than the usual white PVC. It is installed using the same procedure and cement as before. (Depending on your parts it might be a slightly different length. It should fill the coupler ring, the endcap and have enough left sticking out to fully fill the valve socket - 3/4". See the cut schedule above for details). This joint holds full pressure for extended periods so it is imortant that it be a good joint. Prepare the endcap, masking it on the inside to protect the inside vertical glueing surfaces to be used later for the pressure chamber pipe. Position the 1" pipe so it extends into the endcap about 1/3 of an inch. There should be 0.75" of the pipe sticking out of the endcap to fit the socket in the sprinkler valve. (This may need to be adjusted depending on your particular ...
Canty is an outgrowth of the consulting practice of John M. Canty, P.E. in designing a very deep high pressure Diving Research Facility, capable of simulating ocean depths of over a mile, he found that no lighting components were available which would withstand the required pressure of 2500 PSI. It was, therefore, necessary to develop a light that would permit illuminating the chamber at these unusual conditions. Since this vessel (now installed in the high pressure laboratory of the University at Buffalo-Department of Physiology) was to be used for manned experiments, it was desirable to keep the electrical components outside. This is due to the potential fire hazard of electrical sparks in a confined environment. ...
Interactions between Ar projectiles and lead are studied in terms of global observables. The Streamer Chamber at the Berkeley BEVALAC was used to record all charged particles produced in collisions between 0.8 GeV/{mu} Ar projectiles with a Pb{sub 3}O{sub 4} target. A hardware trigger selected central collisions with PB nuclei corresponding to a trigger cross section of 1 barn. In a geometrical picture this is equivalent to an impact parameter range of 0--5 fm.
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From what I can see, Wegman is not Bradley. The fact that McIntyre tries to make that claim is laughable but with skeptics and deniers, the facts dont matter as much as the optics. Make a smear and even if it isnt valid, the mere existence of smears convinces those not in the know. The echo chamber at CA is doing the usual - patting McI on the back and cheering, mostly ignorant of the way things work in science or academia or politics.. When I first came across the whole "McIntyre broke the hockey stick" meme around 2007, one of the first documents I read was the Wegman report. I thought it was mostly crap from the get-go. Yeah maybe Wegman did agree with M&M about the de-centred PC analysis not being valid, but that was the extent of his contribution. Even the recommendations and conclusions are pretty vapid. And the social network analysis? Pure pseudoscience. One could do such an analysis on Wegmans own scholarship and would find the same problem, as would any similar analysis on most ...
Item #: SCP-3255. Object Class: Euclid. Special Containment Procedures: A two meter tall perimeter of electrical fencing is to be erected around the Indrid Ardo Mental Wellness Center and will be patrolled by security personnel. Any individuals attempting to gain access to the building are to be apprehended by security, interviewed and administered amnestics as appropriate.. Personnel are not to be exposed to SCP-3255-1. In the event that an individual does become exposed to SCP-3255-1, they are to be removed from its presence immediately and, depending on the length of time they were exposed for, restrained until either symptoms subside or expiration occurs. Any research involving SCP-3255-1 is to be performed via use of an unmanned drone.. All specimens of SCP-3255-2 are to be kept in separate humanoid containment chambers at the nearby Site-11, each kept under guard by two security personnel at all times. SCP-3255-3, also contained at Site-11, is to be kept inside Anomalous Morgue-27. No ...
OK, I pitched a handful of crushed malt (Global Pils, FWIW) into a liter of 8.5°P wort, purged the growler with CO2 and sealed it with an airlock. Its in the fermentation chamber at 40°C. I guess well see what happens. Navigation. [0] Message Index. [*] Previous page. Go to full version ...
While Wales prepared for the World Cup with two short but intensive boot camps in the middle of Poland, miles from the nearest pub or nightclub, England were put up for ten weeks at a five-star country house hotel in Surrey. Wales had three or four training sessions a day and cryotherapy chambers at minus 120C - dubbed "evil saunas" - to ease recuperation. England said they had a substandard pitch and a confused training regime. "The Welsh trained in short, intense blocks and were definitely the fitter side when we played them in the warm-ups," one player said. "We arrived at training on day one fresh, but by day four you were mentally drained and had been overcoached," another said. Pennyhill Park in Bagshot,…. ...
Associate Justice Ruth Bader Ginsburg poses for a photo in her chambers at the Supreme Court in Washington, Wednesday, July 24, 2013, before an i
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All long-term accelerated testing, including Combined Cycle testing, requires significant resources and time to conduct, with durable modules being expected to survive at least two Combined Cycles and take 8-12 months to test. New product release must take this into account and it is imperative that accelerated lifetime testing is included early in product development plans. Further, it needs to be recognized that accelerated testing cannot simulate the entire spectrum of potential real-world stresses, for example, while more comprehensive than the standard IEC tests, Combined Cycle testing does not include any UV or mechanical load testing, which may accelerate or identify new failure mechanisms that are not evident when solely tested in an unilluminated environmental chamber. The international PV community is currently discussing the relative merits of each of the long-term accelerated test programs, and considering the adoption of a more comprehensive, global, long-term accelerated test ...
Many doctors are ditching drug samples in order to avoind the perception that drug manufacturers influence their treatment decisions.
Water vapor is the hardest natural element to remove from vacuum chamber walls upon exposure to the atmosphere due to monolayer ... Most production equipment utilizing a cryopump have a means to isolate the cryopump from the vacuum chamber so regeneration ... a solid state to a gaseous state and thereby be released from the cryopump through a pressure relief valve into the atmosphere ...
It was caused by workers skipping a crucial step in removing ethylene oxide from a sterilization chamber. Exposure to ethylene ... High-temperature pyrolysis (830-1,200 K (557-927 °C; 1,034-1,700 °F)) at elevated pressure in an inert atmosphere leads to a ... Positive exposure-response trends for lymphoid tumors were found for males only. Reasons for the sex specificity of this effect ... Chronic exposure to ethylene oxide is also mutagenic. The International Agency for Research on Cancer classifies ethylene oxide ...
... diver pressure exposure used in decompression tables and the unit of calibration for pneumofathometers and hyperbaric chamber ... or two atmospheres absolute. For every additional 33 feet of depth, another atmosphere of pressure accumulates. Therefore at ... One atmosphere is approximately equal to 33 feet of sea water or 14.7 psi, which gives 4.9/11 or about 0.445 psi per foot. ... The pressure of seawater at a depth of 33 feet equals one atmosphere. The absolute pressure at 33 feet depth in sea water is a ...
... the structure of the hive or the stores of honey and pollen it contains by sufficiently lengthy exposure to an atmosphere of ... Nectar stored in contaminated cells will contain spores and soon the brood chamber becomes filled with contaminated honey. As ... ethylene oxide gas, as in a closed chamber, as hospitals do to sterilize equipment that cannot withstand steam sterilization. ...
Due to the lack of any atmosphere on the Moon, plants would need to be grown in sealed chambers, though experiments have shown ... Exposure to weightlessness over month-long periods has been demonstrated to cause deterioration of physiological systems, such ... Due to the lack of atmosphere, the location is also suitable for an array of optical telescopes, similar to the Very Large ... Mag-Lev systems are particularly attractive as there is no atmosphere on the surface to slow down the train, so the vehicles ...
The contribution of VOCs to the levels of SOA in the atmosphere have been modeled using simulation chamber experiments to gain ... In particular, exposure to the VOC benzene during crude oil production could pose potentially serious health risks to workers. ... Thief hatches are also used in gauge tanks and in transport vehicles where they must be opened to the atmosphere to take ... Greenhouse gases are necessary for keeping our atmosphere warm enough to sustain life but also serve as a medium for over- ...
The hyperbaric atmosphere in the accommodation chambers and the bell are controlled to ensure that the risk of long term ... which is near the upper limit for long term exposure. Carbon dioxide is removed from the chamber gas by recycling it through ... The entire system is managed from a control room ("van"), where depth, chamber atmosphere and other system parameters are ... The transfer chamber is where the bell is mated to the surface saturation system. It is a wet surface chamber where divers ...
To observe this in a dry atmosphere, air would have needed to first be moistened by exposure to water. The nephelescope enabled ... The nephelescope has been described as an "early cloud-chamber". Espy, James Pollard (1841). The philosophy of storms. Draper, ... As it warms up, pressure inside the container once again increases above atmosphere. This increase in pressure can be used to ... The stopclock is then opened, allowing the pressure of the container to equilibriate the atmosphere, and then closed again. The ...
When Lodovico Altieri was named cardinal, Bedini gained exposure to the diplomatic atmosphere, and he was subsequently called ... His work led the Chamber of Deputies of Rio de Janeiro to improve the living conditions of the German immigrants. Giuseppe ...
If the pressure is rapidly diminished to normal after exposure to saturation in compressed air, the venous blood will give off ... In 1907 Haldane made a decompression chamber to help make deep-sea divers safer and produced the first decompression tables ... Schrötter, Heller and Mager framed rules for safe decompression and believed that the decompression rate of one atmosphere (atm ... Results showed that a certain minimum pressure is required to give symptoms on goats and that duration of exposure to high ...
The purpose of this test is to simulate corrosion phenomenon due to atmospheric exposure. The electronic product is exposed to ... to evaluate resistance to corrosion due to gases in the atmosphere. Mixed Flowing Gas (MFG) test is a laboratory test in which ... in a controlled environmental chamber. Test samples that have been exposed to MFG testing have ranged from bare metal surfaces ... Flowing Gas Tests for Electrical Contacts ASTM B810-01a-Standard Method for Calibration of Atmospheric Corrosion Test Chambers ...
... monitoring and therapeutic devices in chambers Risk assessment, incidents monitoring and safety plan in HBO chambers HBO Safety ... A more useful grouping is conditions that are associated with exposure to variations of ambient pressure. These conditions are ... The ambient pressure underwater increases by 1 standard atmosphere (100 kPa) for every 10 metres (33 ft) of depth. The ... Hyperbaric medicine is a corollary field associated with diving, since recompression in a hyperbaric chamber is used as a ...
Methods to administer CO2 include placing animals directly into a closed, prefilled chamber containing CO2, or exposure to a ... Carbon dioxide has no liquid state at pressures below 5.1 standard atmospheres (520 kPa). At 1 atmosphere (near mean sea level ... Toxicity of Carbon Dioxide Gas Exposure, CO2 Poisoning Symptoms, Carbon Dioxide Exposure Limits, and Links to Toxic Gas Testing ... have rapidly increased its concentration in the atmosphere, leading to global warming. The CO2 released into the atmosphere as ...
Hypobaric Chamber Facility or HCF (altitude chambers) Two Class D chambers (man-rated) rarefied air atmosphere, non-oxygen ... 23,656 simulated altitude exposures of human volunteers over 33 years of studies 13 Environmental Chambers Temperatures from - ... ft.) Small Study Chamber: internal volume of 1100 cu. ft. (floor area 108 sq. ft.) Environmentally controlled (altitude, ... DeGroot DW, Devine JA, Fulco CS (September 2003). "Incidence of adverse reactions from 23,000 exposures to simulated ...
The key concerns for a human without protective clothing beyond Earth's atmosphere are the following, listed roughly in the ... consciousness after approximately 15 seconds of being accidentally depressurized in a ground-based depressurization chamber. If ... Space exposure is the subjection of a human to the conditions of outer space, without protective clothing and beyond the ... The only known humans to have died of space exposure are the three crew members of the Soyuz 11 spacecraft: Vladislav Volkov, ...
The pump's cavity is then sealed from the chamber, opened to the atmosphere, and squeezed back to a minute size. The above ... A study by NASA on eight chimpanzees found all of them survived two and a half minute exposures to vacuum. There is only a ... A submarine maintaining an internal pressure of 1 atmosphere submerged to a depth of 10 atmospheres (98 metres; a 9.8 metre ... Stars, planets, and moons keep their atmospheres by gravitational attraction, and as such, atmospheres have no clearly ...
Note: 1 atmosphere (atm) is 1.013 bars. Toxicity of Carbon Dioxide Gas Exposure, CO2 Poisoning Symptoms, Carbon Dioxide ... as hearing sensitivity is not significantly affected by the breathing gas or chamber atmosphere composition or pressure. ... Prolonged exposure to above-normal oxygen partial pressures, or shorter exposures to very high partial pressures, can cause ... The onset of seizure depends upon the partial pressure of oxygen in the breathing gas and exposure duration. However, exposure ...
Long-term exposure causes multiple health problems, one of the most significant being loss of bone and muscle mass. Over time ... Human physiology is adapted to living within the atmosphere of Earth, and a certain amount of oxygen is required in the air we ... The suit probably did not reach a hard vacuum, and we began repressurizing the chamber within 15 seconds. The subject regained ... A short-term exposure to vacuum of up to 30 seconds is unlikely to cause permanent physical damage. Animal experiments show ...
This mass, after exposure to sun and air, becomes melange." Probe, Ixian - Device used to capture the thoughts of a person ( ... No-chamber - Construct that hides anything inside from prescient and ocular vision, as well as other methods of detection. No- ... Obliterators - Weapons of mass destruction stolen by Honored Matres from their "outside enemy;" they combust the atmosphere of ... Selamlik - "Imperial audience chamber." Semuta - "Second narcotic derivative (by crystal extraction) from the burned residue of ...
The entire system is managed from a control room (van), where depth, chamber atmosphere and other system parameters are ... The computer retains the diver's pressure exposure history, and continuously updates the calculated tissue loads on the surface ... A deck decompression chamber (DDC), or double-lock chamber is a two compartment pressure vessel for human occupation which has ... A "Saturation System" or "Saturation spread" typically includes a living chamber, transfer chamber and submersible ...
Some of these simulation chambers are kept with atmosphere and filters to simulate Mars conditions of UV, and in some of the ... black yeast Exophiala jeanselmei, also adapted and recovered metabolic activity during exposure to a simulated Mars environment ... "Planetary Atmosphere and Surfaces Chamber (PASC): A Platform to Address Various Challenges in Astrobiology". Challenges. 5 (2 ... Because of the low levels of oxygen of 0.13% in the atmosphere, and (as far as we know) in any of the proposed habitats, all ...
They were filled with a mixture of argon and carbon dioxide at 4.5 standard atmospheres (460 kPa). Eight chambers were arranged ... The sources posed a considerable radiation exposure risk; the exposure rate of a 1,000 Ci (37 TBq) source at 1 meter (3 ft 3 in ... The highest exposure to a person was 1.25 R of hard radiation and 4.7 roentgen equivalent physical of soft radiation. After ... The ionization chambers were cylindrical, 2 inches (51 mm) in diameter, 30 inches (760 mm) long, with a wire along the ...
Further, the plasma exposure times could be arranged longer than with, e.g. RIE method. The wafers are activated with short RIE ... Electrons of the atmosphere move towards the HF electrode during its positive voltage. The most established frequency of the HF ... The input gases enter the remote plasma source and are transported to the main process chamber to react. A scheme of the system ... The moving electrons of the atmosphere are banging into the plasma gas atoms and hit out electrons. Due to its positive ...
It's possible that the skin can repair itself after short-term exposure to PAHs, but not after long-term exposure. Working with ... These companies included: British Tar Products Lancashire Tar Distillers Midland Tar Distillers Newton, Chambers & Company ( ... most of the coal tar binders are vaporised and are generally burned in an incinerator to prevent release into the atmosphere, ... Long-term skin exposure to these compounds can produce "tar warts", which can progress to squamous cell carcinoma. The ...
This treatment involves pressurizing the chamber with pure oxygen at an absolute pressure close to three atmospheres, allowing ... The slow release rate of carbon monoxide causes an accumulation of CO-bound hemoglobin molecules as exposure to carbon monoxide ... Exposure to small concentrations of CO hinder the ability of Hb to deliver oxygen to the body, because carboxyhemoglobin forms ... treatment in a Hyperbaric Chamber is a more effective manner of reducing the half-life of COHb than administering oxygen alone ...
Hollywood Chamber of Commerce. Archived from the original on April 3, 2016. Retrieved December 1, 2016.. ... "absorbed and assumed something of the atmosphere and emotional climate of the picture." She said it offered "a new and exciting ... Gary Merrill NBC series Justice in the role of a desperately poor and aging film star who attempts suicide to avoid exposure as ...
Exposure-limits; Pressure-chambers; Physiology; Accident-potential ... NIOSH-Contract; Accident-analysis; Physiological-measurements; Metabolites; Tissue-disorders; Biological-effects; Atmosphere- ...
Exposure-limits; Pressure-chambers; Physiology; Accident-potential ... NIOSH-Contract; Accident-analysis; Physiological-measurements; Metabolites; Tissue-disorders; Biological-effects; Atmosphere- ...
Atmosphere; Indoor air pollution; Environmental control; Exposure chambers; Air flow; Air contaminants; Ventilation; Analytical ... The use of the turbulent eddy diffusion model and its variants in exposure assessment is limited due to the lack of knowledge ... These findings make the use of turbulent eddy diffusion models for exposure assessment in workplace/indoor environments more ... We constructed an experimental chamber with a spatial concentration gradient away from the contaminant source, and conducted 27 ...
Exposure-methods; Industrial-poisons; Exposure-chambers; Histological-changes; Nervous-system-disorders; Tissue-reactions; ... NIOSH-Grant; Neurotoxic-effects; Neurotoxic-agents; Laboratory-animals; Controlled-atmospheres; Solvent-vapors; ... and 6 months of exposure. During the exposure period, none of the test animals displayed neurological impairment, or any other ... Groups of six animals were housed in four inhalation chambers and exposed to 1,475 milligrams per cubic meter (mg/cum) of ...
A 14-day Continuous Exposure to 5.2 Per Cent O 2 in N 2 at 4.0 Atmospheres Absolute Pressure ... Multiday Exposure of Men to High Nitrogen Pressure and Increased Airway Resistance at Natural Expired Oxygen Tension: ... Atmosphere Exposure Chambers Actions. * Search in PubMed * Search in MeSH * Add to Search ... A 14-day Continuous Exposure to 5.2 Per Cent O 2 in N 2 at 4.0 Atmospheres Absolute Pressure C J Lambertsen et al. Aerosp Med. ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: 205-L polycarbonate ... Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: 205-L polycarbonate ... Chamber samples from within the DCDMS exposure chambers and the control chamber were collected from the approximate animal ... Chamber samples from within the DCDMS exposure chambers and the control chamber were collected from the approximate animal ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: two "Wright" dust ... Exposure chamber volume: 40 litre internal volume. - Method of holding animals in test chamber: animals were housed in a single ... Duration of exposure:. 4 h. Concentrations:. The mean measured concentration of Acetoguanamine in the atmosphere was 2.031 mg/L ... Exposure of Acetoguanamine at a single chamber concentration of 2.031 mg/L did not cause mortality. Minor signs of toxiocity ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: The exposure ... The analytically determined mean achieved atmosphere concentration in the exposure chamber of the treated group was 4.09 mg/L, ... Duration of exposure:. 4 h. Concentrations:. 4.09 mg/L. No. of animals per sex per dose:. 5 rats per sex per dose. Control ... Post exposure observation period: 14 days Statistics:. None. Sex:. male/female. Dose descriptor:. LC50. Effect level:. > 4.09 ...
Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: whole-body exposure chambers ... GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: special whole-body exposure chambers (6 or 12 m³) of ... GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: special whole-body exposure chambers (6 or 12 m³) of ... Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: inhalation chambers made of ...
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: Glass and stainless steel exposure chambers. - ... GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: Glass and stainless steel exposure chambers. - ... Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: Stainless steel ... Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: Stainless steel ...
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: flow through nose only chamber. This system was an ... known volume of test atmosphere in the exposure chamber, through a glass fibre filters. Sampling was performed eight times ... Duration of exposure:. ca. 4 h. Concentrations:. Target concentration: 5.0 mg/L. Mean achieved atmosphere concentration: 5.11 ... Details on dermal exposure:. TEST SITE. - Area of exposure: 10% of body surface, dorsal site. - Type of wrap if used: ...
Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: Each group of animals was ... for all exposure chambers. - Chamber airflow: The mean chamber airflow in all four exposure chambers was maintained between 463 ... D5 exposure chambers, respectively. - Chamber temperature: Mean chamber temperature values for all chambers were maintained ... Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: 2 cubic meter stainless steel ...
Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: 1.4 m³ stainless steel and ... Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: 1.4 m3 stainless steel and ... Temperature, humidity, pressure in air chamber: - Air flow rate: about 300 L/min. TEST ATMOSPHERE. - Brief description of ... Duration of treatment / exposure:. In the definitive study, groups of 24 pregnant rats were targeted for exposure to 0 (control ...
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: animal chmaber - Exposure chamber volume: 100 to 152 ... air in the exposure chamber. - System of generating atmosphere: 100 g of the test material was placed in the sealed exposure ... Male and female rats (5 per sex) survived a 6-hour whole body exposure to a saturated vapour atmosphere. There were no deaths ... Male and female rats (5 per sex) survived a 6-hour whole body exposure to a saturated vapour atmosphere. There were no deaths ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: TSE, Technical & ... Exposure chamber volume: 19 L. - Method of holding animals in test chamber: Trapped in outer chamber with opening to exposure ... Temperature, humidity, pressure in air chamber: 21-23 degree C, 12.7 to 16.0 %, approx. 3 bar. TEST ATMOSPHERE. - Brief ... Details on dermal exposure:. TEST SITE. - Area of exposure: dorso-lumbar region. - % coverage: 10%. - Type of wrap if used: ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Inhalation Exposure System: Inhalation ... Test atmosphere samples were collected four times during exposure in a solvent trap with 100 mL acetonitrile at room ... Observations for viability were recorded once before exposure on the day of exposure (test day 1), three times during exposure ... Analytical verification of test atmosphere concentrations:. yes. Duration of exposure:. 4 h. Concentrations:. 0.76 +/- 0.06 mg/ ...
The test atmosphere was generated to contain at least 19% oxygen.. - Exposure Chamber Atmosphere Concentration: Prior to the ... located at the top of the exposure chamber.. - Exposure chamber volume: Cylindrical exposure chamber had a volume of ... Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: Test item was ... Exposure chamber oxygen concentration: Oxygen levels within the exposure chamber were measured by an electronic oxygen analyzer ...
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: ADG snout-only inhalation exposure chamber, ... Atmosphere samples and particle size distribution samples were determined by gravimetric analysis.. Duration of exposure:. 4 h ... Exposure chamber volume: ca. 30 litres. - Method of particle size determination: Cascade Impactor. - Temperature, humidity, ... pressure in air chamber: 20.6-25ºC, 36.2-58.9%, TEST ATMOSPHERE. - Samples taken from breathing zone: yes. TEST ATMOSPHERE (if ...
Details on exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: 1.4 cubic meter stainless ... TEST ATMOSPHERE. - Brief description of analytical method used: Chamber atmospheres were monitored every 30 minutes using ... The negative and positive controls were similarly housed in exposure chambers receiving air. During exposure animals were ... Chamber atmospheres were monitored every 30 minutes via gas chromatograph (GC). The GC was calibrated daily with gaseous ...
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure chamber volume: 20 L glass exposure chamber. - Method of ... chamber volume was kept as small as was practical, handling of rats was minimized. - Atmosphere generation: Atmospheres were ... Analytical verification of test atmosphere concentrations:. yes. Duration of exposure:. 4 h. Concentrations:. 8.4; 12.1; 15.2; ... Type of inhalation exposure:. whole body. Vehicle:. other: air. Details on inhalation exposure:. ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure system: Whole-body inhalation ... Analytical verification of test atmosphere concentrations:. yes. Duration of exposure:. 4 h. Concentrations:. 5.3 mg/l and 20 ... and were exposed in the chamber .. The homogenous distribution of atmosphere in this inhalation system has been proven in ... The vapors that developed were mixed with supply air and passed into the exposure system .. EXPOSURE:. A supply air flow ( ...
GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: The test atmospheres were generated by means of a ... The test atmosphere was supplied to the chambers at a rate in the range 5.0 to 13.5 litres per minute. - The chambers were ... Exposure chamber volume: 7 litres. - Method of holding animals in test chamber: The animals were housed in two 7 litre tubular ... Analytical verification of test atmosphere concentrations:. yes. Duration of exposure:. 4 h. Concentrations:. 6.1% (v/v) (range ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Method of holding animals in test ... Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Method of holding animals in test ... into an airstream which was discharged into the exposure chamber. - Temperature, humidity, pressure in air chamber (group means ... into an airstream which was discharged into the exposure chamber. - Temperature, humidity, pressure in air chamber (group means ...
Details on inhalation exposure:. GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION. - Exposure apparatus: the study was ... Between the exposure times the chamber was cleaned carefully.. TEST ATMOSPHERE. - Brief description of analytical method used: ... Exposition started by locating the animals into the exposure chamber after equilibration of the chamber concentration for at ... At the bottom of the exposure chamber, the air was sucked off at a lower flow rate than it was created by the dust generator in ...
  • A fractional factorial experimental design was used with the following factors and levels: vapor (n-hexane vs. m-xylene), pump type (pulsating vs. continuous), exposure profile (variable vs. constant), flow rate (30 mL/min vs. 200 mL/min), duration (30 min vs. 80 min), and sample placement (mannequin vs. free hanging). (cdc.gov)
  • A recent survey of the studies on the effect of traffic emissions on pregnancy outcomes has linked exposure to emissions to adverse effects on gestational duration and possibly also intrauterine growth. (wikipedia.org)
  • In addition, detailed epidemiological investigations have shown no causative link between titanium dioxide exposure and cancer risk in humans. (europa.eu)
  • Test chamber exposure of humans to 1,6-hexamethylene diisocyanate (HDI). (cdc.gov)
  • In 1957, George F. Bond began the Genesis project at the Naval Submarine Medical Research Laboratory proving that humans could in fact withstand prolonged exposure to different breathing gases and increased environmental pressures. (wikipedia.org)
  • The only known humans to have died of space exposure are the three crew members of the Soyuz 11 spacecraft: Vladislav Volkov, Georgi Dobrovolski and Viktor Patsayev. (wikipedia.org)
  • Unplanned exposure to radionuclides generally has a harmful effect on living organisms including humans, although low levels of exposure occur naturally without harm. (wikipedia.org)
  • Several years later The Masters' atmosphere seeding spaceship arrives and destroys the remains of their cities, presumably to prevent the humans from reverse engineering their technology - although Beanpole notes that they have already learned much from the cities - then leaves. (wikipedia.org)
  • Methods for the generation of aerosols and vapors used in inhalation experiments were reviewed, and the characteristic features of the corresponding atmospheres and the limitations of the methods used to generate them were outlined. (cdc.gov)
  • Oxidation flow reactors (OFRs) are increasingly used to study the formation and evolution of secondary organic aerosols (SOA) in the atmosphere. (springer.com)
  • Nano-TiO2 aerosols generated from bulk dry nano-TiO2 powders (primary diameter of 21 nm, bulk density of 3.8 g/cm3) were delivered into the exposure chamber at a flow rate of 90 LPM (10.8 air changes/hr). (cdc.gov)
  • Exposure apparatus: The exposure equipment comprised a Wright dust feed generator connected to a 40L-exposure chamber utilising a tangential, continuous air-flow system. (europa.eu)
  • Exposure apparatus: Each group of animals was exposed in a 2 m3 stainless steel and glass whole body inhalation chamber. (europa.eu)
  • Several factors influence the diver, including immersion, exposure to the water, the limitations of breath-hold endurance, variations in ambient pressure, the effects of breathing gases at raised ambient pressure, effects caused by the use of breathing apparatus, and sensory impairment. (wikipedia.org)
  • The apparatus for testing consists of a closed testing cabinet/chamber, where a salt water (5% NaCl) solution is atomized by means of spray nozzle(s) using pressurized air. (wikipedia.org)
  • The ECHM-EDTC Educational and Training Standards for Diving and Hyperbaric Medicine (2011) specify the following scope of knowledge for Diving Medicine: The ECHM-EDTC Educational and Training Standards for Diving and Hyperbaric Medicine (2011) specify the following scope of knowledge for Hyperbaric Medicine additional to that for Diving medicine: Physiology and pathology of diving and hyperbaric exposure. (wikipedia.org)
  • Under the authority of the Federal Advisory Committee Act (FACA) P.L. 92-463 of 1972, the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances (NAC/AEGL Committee) has been established to identify, review, and interpret relevant toxicologic and other scientific data and develop AEGLs for high-priority, acutely toxic chemicals. (nap.edu)
  • This document was prepared by the AEGL Development Team composed of Cheryl B. Bast (Oak Ridge National Laboratory) and Chemical Managers Robert Snyder and Paul Tobin (National Advisory Committee [NAC] on Acute Exposure Guideline Levels for Hazardous Substances). (nap.edu)
  • Both the document and the AEGL values were then reviewed by the National Research Council (NRC) Committee on Acute Exposure Guideline Levels. (nap.edu)
  • Studies range from acute to sub-chronic and chronic through to carcinogenic exposures. (criver.com)
  • The insights gleaned from the acute studies planned in Projects 1 and 2 in conjunction with chronic studies in Project 3, have significant public health ramifications and may eventually lead to policy changes to avert environmental exposure to PM 2.5 . (epa.gov)
  • In human experimental studies using an exposure chamber setup, DE has been linked to acute vascular dysfunction and increased thrombus formation. (wikipedia.org)
  • Acute poisoning is exposure to a poison on one occasion or during a short period of time. (wikipedia.org)
  • These vacuum chambers are able to simulate atmospheres and surface temperatures representative of the majority of planetary objects, and they are especially appropriate for studying the physical, chemical and biological changes induced in a particular sample by in situ irradiation or physical parameters in a controlled environment. (mdpi.com)
  • second, many of the experimental techniques (spectroscopies, microscopies and diffraction techniques) used to measure sample properties need vacuum conditions to operate and furthermore, the ability to establish a vacuum also allows for the chamber to then be filled with the gases required to simulate a desired planetary atmosphere. (mdpi.com)
  • The purpose of this test is to simulate corrosion phenomenon due to atmospheric exposure. (wikipedia.org)
  • The implementation of our vacuum chambers in combination with analytical techniques was specifically developed to make feasible the in situ physico-chemical characterization of samples. (mdpi.com)
  • Using state of the art multiple exposure systems available at OSU (OASIS-1 and OASIS-2) and MI in conjunction the resources available at the ECC including the use of several novel and novel high-time resolution exposure characterization methods, GLACIER offers an unprecedented opportunity to elucidate relevant mechanisms responsible for the effects of multipollutant CAP on the pathogenesis of insulin resistance and inflammation. (epa.gov)
  • Post-exposure survivors rapidly awoke and showed no clinical signs, other than transient weight loss for 1-2 days sporadic lung noise. (europa.eu)
  • 1985. Symptoms and lung function in low-exposure to TDI by polyurethane foam manufacturing. (cdc.gov)
  • 1987. Exposure, lung function, and symptoms in car painters exposed to hexamethylene diisocyanate and biuret modified hexamethylendiisocyanate. (cdc.gov)
  • Primary endpoints will include spirometry and lung cell changes post-exposure. (clinicaltrials.gov)
  • Airway responses include spirometry and lung cell changes following exposure to either clean air, ozone or diesel exhaust Lung cell changes include change in number and type of cells, changes in genetic (gene expression) and epigenetic responses (primarily changes in DNA methylation, microRNA expression and chromatin modification. (clinicaltrials.gov)
  • In Aim 2, we will investigate the effect of co-exposure of multipollutant CAP with ozone on the temporal development of insulin resistance and adipose/lung inflammation using the KKA/y model. (epa.gov)
  • The animals received Alderley Park diet supplied and water (provided by an automatic drinker system) ad libitum except for the males during the exposure period. (europa.eu)
  • Diet: KLIBA rat/mouse/hamster laboratory diet 24-343-4 10 mm pellets, Klingentalmühle AG, Kaiseraugst, Switzerland, ad libitum during post-exposure observation period. (europa.eu)
  • Diet : Purina Certified rodent chow (pellets) ad libitum during non-exposure periods. (europa.eu)
  • Water : automatic watering system, ad libitum during non-exposure periods. (europa.eu)
  • Food and water available ad libitum, except during exposure. (europa.eu)
  • MIL-STD-810, Environmental Engineering Considerations and Laboratory Tests, is a United States Military Standard that emphasizes tailoring an equipment's environmental design and test limits to the conditions that it will experience throughout its service life, and establishing chamber test methods that replicate the effects of environments on the equipment rather than imitating the environments themselves. (wikipedia.org)
  • This not only contributed to environmental contamination but also much potentially reusable PCE was lost to the atmosphere. (wikipedia.org)
  • Certain roof shales in coal mines deteriorate upon exposure to the atmosphere, causing difficulties in the mining operations and adding to the cost. (cdc.gov)
  • Airborne sea spray and marine and coastal organisms are all responsible for introducing sulfur into the atmosphere. (cdc.gov)
  • The term immediately dangerous to life or health (IDLH) is defined by the US National Institute for Occupational Safety and Health (NIOSH) as exposure to airborne contaminants that is "likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment. (wikipedia.org)
  • The Nuclear Regulatory Commission defines two emergency planning zones around nuclear power plants: a plume exposure pathway zone with a radius of 10 miles (16 km), concerned primarily with exposure to, and inhalation of, airborne radioactive contamination, and an ingestion pathway zone of about 50 miles (80 km), concerned primarily with ingestion of food and liquid contaminated by radioactivity. (wikipedia.org)
  • A personal dust monitor (PDM) was developed to measure respirable coal mine dust mass to provide accurate exposure data at the end of a work shift. (cdc.gov)
  • Measurement of personal exposure to coal mine dust has more than 1,000 annual deaths attributed to complications from remained essentially unchanged for the last 35 years under the CWP in U.S. coal mines [NIOSH (cdc.gov)
  • This study examines the accuracy of area sampling for measuring the dust exposure of mining machine operators at coal mine working faces. (cdc.gov)
  • During the baking process of the green blocks as a part of commercial graphite production, most of the coal tar binders are vaporised and are generally burned in an incinerator to prevent release into the atmosphere, as COV and coal tar can be injurious to health. (wikipedia.org)
  • These companies included: British Tar Products Lancashire Tar Distillers Midland Tar Distillers Newton, Chambers & Company (owners of Izal brand disinfectant) Sadlers Chemicals According to the National Psoriasis Foundation, coal tar is a valuable, safe and inexpensive treatment option for millions of people with psoriasis and other scalp or skin conditions. (wikipedia.org)
  • excessive citations] The complex nature of chemical interactions in flare, flash, and other production vapors have spawned many efforts to describe and control how these hydrocarbons interact with other materials in the atmosphere to create air pollution. (wikipedia.org)
  • This draws crankcase fumes heavy in unburned hydrocarbons - a precursor to photochemical smog - into the engine's intake tract so they are burned rather than released unburned from the crankcase into the atmosphere. (wikipedia.org)
  • Furthermore the LC50 value (inhalation) was calculated to be greater than 2.031 mg/L, which was considered to be the maximum practical with the atmosphere generation system used. (europa.eu)
  • Determination of IAQ involves the collection of air samples, monitoring human exposure to pollutants, collection of samples on building surfaces, and computer modelling of air flow inside buildings. (wikipedia.org)
  • The atmospheres were generated by completely evaporating the solvent into the streams of ventilating air entering the chambers using micrometering pumps and vaporizers. (europa.eu)
  • Typically, before solvent or reagents are introduced into a Schlenk flask, the flask is dried and the atmosphere of the flask is exchanged with an inert gas. (wikipedia.org)
  • The basket capacity is between about 10 and 40 kg (22 to 88 lb).[citation needed] During the wash cycle, the chamber is filled approximately one-third full of solvent and begins to rotate, agitating the clothing. (wikipedia.org)
  • A method for dry etching and chamber cleaning high dielectric constant materials is disclosed herein. (google.com)
  • Ion chambers are usually considered high-end instruments because they are used to measure high exposure rates - let's say 1 mR/hr and above. (cdc.gov)
  • And if you are moving too quickly, you might find yourself in a high-exposure-rate area before the ion chamber has had enough time to respond and let you know what's going on. (cdc.gov)
  • Finally, an ion chamber will read too high if moisture gets into the chamber. (cdc.gov)
  • Lanthanum-140 was chosen because it emits gamma rays in the desired energy range (1.60 megaelectronvolts (MeV), with fraction of 0.49 MeV), and has very high specific activity, thus providing sufficient radiation intensity to produce usable signals from the ionization chambers. (wikipedia.org)
  • By 1927, interest in the detection of X-ray and ultraviolet (UV) radiation at high altitudes inspired researchers to launch Goddard's rockets into the upper atmosphere to support theoretical studies and data gathering. (wikipedia.org)
  • Radon resulting from the high radium content in uncovered dumps and tailing ponds can be easily released into the atmosphere. (wikipedia.org)
  • Compton's location adjacent to High Street, the main road to Port Norris, afforded plenty of exposure for his store (no longer extant) at the rear of the property. (wikipedia.org)
  • Most of the available data regarding barodontalgia is derived from high-altitude chamber simulations rather than actual flights. (wikipedia.org)
  • Similarly, cases of barodontalgia were reported in 0.3% of high altitude-chamber simulations in the Luftwaffe. (wikipedia.org)
  • The resulting exposure to high levels of particulate matter resulted in between 1.5 million and 2 million deaths in 2000. (wikipedia.org)
  • The V-2 would tumble in the rare atmosphere at high altitudes. (wikipedia.org)
  • The concept of the ablative heat shield was described as early as 1920 by Robert Goddard: "In the case of meteors, which enter the atmosphere with speeds as high as 30 miles per second (48 km/s), the interior of the meteors remains cold, and the erosion is due, to a large extent, to chipping or cracking of the suddenly heated surface. (wikipedia.org)
  • First, a typical ion chamber is not sufficiently sensitive to perform measurements at the low exposure rates that you are likely to encounter. (cdc.gov)
  • The overall mass difference between measurements before and after aridity exposure is attributed to body water loss, as respiratory water loss is generally considered negligible. (wikipedia.org)
  • Groups of six animals were housed in four inhalation chambers and exposed to 1,475 milligrams per cubic meter (mg/cum) of purified methyl -ethyl- ketone (78933) (MEK) vapors, a 1,750mg/cum mixture of hexane isomers largely free of normal hexane, 400mg/cum of methyl normal butyl- ketone (591786) (MnBk), or to hydrocarbon free air. (cdc.gov)
  • During exposure animals were housed individually without access to food or water in one of twenty compartments in a box made of steel and glass with an internal capacity of approximated 3 litres. (europa.eu)
  • System of generating vapour: Liquid test substance was pumped into a heated glass vapour generator and the resulting vapours were mixed with room air and then delivered to the exposure chamber. (europa.eu)
  • Purpose: The purpose of this protocol is to compare the genetic and epigenetic effects between diesel exhaust and ozone exposure in healthy individuals and in mild/moderate asthmatics. (clinicaltrials.gov)
  • Procedures (methods): Subjects will be exposed to clean air, to 300 µg/m3 of diesel exhaust for 2 hours and to 0.3 ppm of ozone for 2 hours with intermittent exercise in a controlled environment chamber. (clinicaltrials.gov)
  • Exposure to 0.3ppm ozone will be conducted in an exposure chamber at the EPA Human Studies Facility on the UNC campus. (clinicaltrials.gov)
  • Ozone exposures will be conducted in a (6 ft x 6 ft x 8 ft) stainless steel chamber with a continuous supply of exposure medium. (clinicaltrials.gov)
  • In this project, we hypothesize that chronic inhalation of CAP in conjunction with gaseous components such as ozone from distinct multipollutant atmospheres synergistically interacts with diet and genetic susceptibility to influence development of CMS. (epa.gov)
  • We were interested in isolating the effects of ozone prior to conducting multi-pollutant exposures in combination with CAPS which we had proposed performing as part of Aim 3. (epa.gov)
  • Because of it's widespread use, and the widespread release of sulfur dioxide, the potential for human exposure to sulfuric acid is substantial. (cdc.gov)
  • The relative importance of these pathways in terms of human exposure potential is difficult to establish given the limited monitoring data available for vinyl acetate. (cdc.gov)
  • Additionally, the new monitor continuously displays near- real-time dust exposure data during the shift. (cdc.gov)
  • Each chamber was constructed of aluminum, with a volume of 1 m3 and was ventilated by air drawn from the laboratory through dust filters. (europa.eu)