A highly volatile inhalation anesthetic used mainly in short surgical procedures where light anesthesia with good analgesia is required. It is also used as an industrial solvent. Prolonged exposure to high concentrations of the vapor can lead to cardiotoxicity and neurological impairment.
Chlorinated ethanes which are used extensively as industrial solvents. They have been utilized in numerous home-use products including spot remover preparations and inhalant decongestant sprays. These compounds cause central nervous system and cardiovascular depression and are hepatotoxic. Include 1,1,1- and 1,1,2-isomers.
A hypnotic and sedative used in the treatment of INSOMNIA.
Toxic chlorinated unsaturated hydrocarbons. Include both the 1,1- and 1,2-dichloro isomers. Both isomers are toxic, but 1,1-dichloroethylene is the more potent CNS depressant and hepatotoxin. It is used in the manufacture of thermoplastic polymers.
A chlorinated hydrocarbon used as an industrial solvent and cooling liquid in electrical transformers. It is a potential carcinogen.
Used as a solvent, in the manufacture of insecticides, and for treating sweet potatoes before planting. May cause nausea, vomiting, pains in head and chest, stupefaction. Irritates mucous membranes and causes kidney and liver degeneration.
A strong acid used as a protein precipitant in clinical chemistry and also as a caustic for removing warts.
Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed)
Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.
A family of gram-negative, aerobic bacteria utilizing only one-carbon organic compounds and isolated from in soil and water.
A widely used industrial solvent.
Hydrocarbon compounds with one or more of the hydrogens replaced by CHLORINE.
A commonly used laboratory solvent. It was previously used as an anesthetic, but was banned from use in the U.S. due to its suspected carcinogenicity.
Oxidases that specifically introduce DIOXYGEN-derived oxygen atoms into a variety of organic molecules.
Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water.
A derivative of ACETIC ACID that contains two CHLORINE atoms attached to its methyl group.
A gas that has been used as an aerosol propellant and is the starting material for polyvinyl resins. Toxicity studies have shown various adverse effects, particularly the occurrence of liver neoplasms.
Carcinogenic substances that are found in the environment.
An antiseptic and disinfectant aromatic alcohol.
A recurrent contact dermatitis caused by substances found in the work place.
Halogenated hydrocarbons refer to organic compounds containing carbon and hydrogen atoms, where one or more hydrogen atoms are replaced by halogens such as fluorine, chlorine, bromine, or iodine.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed)
A mobile, very volatile, highly flammable liquid used as an inhalation anesthetic and as a solvent for waxes, fats, oils, perfumes, alkaloids, and gums. It is mildly irritating to skin and mucous membranes.
A species of BURKHOLDERIA considered to be an opportunistic human pathogen. It has been associated with various types of infections of nosocomial origin.
An inhalation anesthetic. Currently, methoxyflurane is rarely used for surgical, obstetric, or dental anesthesia. If so employed, it should be administered with NITROUS OXIDE to achieve a relatively light level of anesthesia, and a neuromuscular blocking agent given concurrently to obtain the desired degree of muscular relaxation. (From AMA Drug Evaluations Annual, 1994, p180)
Medical specialty concerned with the promotion and maintenance of the physical and mental health of employees in occupational settings.
Substances or energies, for example heat or light, which when introduced into the air, water, or land threaten life or health of individuals or ECOSYSTEMS.
Design, development, manufacture, and operation of heavier-than-air AIRCRAFT.
Any of the compounds derived from a group of glycols or polyhydroxy alcohols by chlorine substitution for part of the hydroxyl groups. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
Adverse effect upon bodies of water (LAKES; RIVERS; seas; groundwater etc.) caused by CHEMICAL WATER POLLUTANTS.
An ethanol-inducible cytochrome P450 enzyme that metabolizes several precarcinogens, drugs, and solvents to reactive metabolites. Substrates include ETHANOL; INHALATION ANESTHETICS; BENZENE; ACETAMINOPHEN and other low molecular weight compounds. CYP2E1 has been used as an enzyme marker in the study of alcohol abuse.
I'm sorry for any confusion, but "Utah" is a proper noun and refers to a state in the United States, it does not have a medical definition. If you have any medical questions or need information on specific medical conditions or terms, I would be happy to help!

Quantitative aspects in the assessment of liver injury. (1/423)

Liver function data are usually difficult to use in their original form when one wishes to compare the hepatotoxic properties of several chemical substances. However, procedures are available for the conversion of liver function data into quantal responses. These permit the elaboration of dose-response lines for the substances in question, the calculation of median effective doses and the statistical analysis of differences in liver-damaging potency. These same procedures can be utilized for estimating the relative hazard involved if one compares the liver-damaging potency to the median effective dose for some other pharmacologie parameter. Alterations in hepatic triglycerides, lipid peroxidation, and the activities of various hepatic enzymes can also be quantitiated in a dose-related manner. This permits the selection of equitoxic doses required for certain comparative studies and the selection of doses in chemical interaction studies. The quantitative problems involved in low-frequency adverse reactions and the difficulty these present in the detection of liver injury in laboratory animals are discussed.  (+info)

Glutathione conjugation of trichloroethylene in human liver and kidney: kinetics and individual variation. (2/423)

Isolated human hepatocytes exhibited time-, trichloroethylene (Tri) concentration-, and cell concentration-dependent formation of S-(1, 2-dichlorovinyl)glutathione (DCVG) in incubations in sealed flasks with 25 to 10,000 ppm Tri in the headspace, corresponding to 0.011 to 4.4 mM in hepatocytes. Maximal formation of DCVG (22.5 +/- 8.3 nmol/120 min per 10(6) cells) occurred with 500 ppm Tri. Time-, protein concentration-, and both Tri and GSH concentration-dependent formation of DCVG were observed in liver and kidney subcellular fractions. Two kinetically distinct systems were observed in both cytosol and microsomes from pooled liver samples, whereas only one system was observed in subcellular fractions from pooled kidney samples. Liver cytosol exhibited apparent Km values (microM Tri) of 333 and 22.7 and Vmax values (nmol DCVG formed/min per mg protein) of 8.77 and 4.27; liver microsomes exhibited apparent Km values of 250 and 29.4 and Vmax values of 3.10 and 1.42; kidney cytosol and microsomes exhibited apparent Km values of 26.3 and 167, respectively, and Vmax values of 0.81 and 6.29, respectively. DCVG formation in samples of liver cytosol and microsomes from 20 individual donors exhibited a 6.5-fold variation in microsomes but only a 2.4-fold variation in cytosol. In coincubations of pooled liver cytosol and microsomes, addition of an NADPH-regenerating system produced marked inhibition of DCVG formation, but addition of GSH had no effect on cytochrome P-450-catalyzed formation of chloral hydrate. These results indicate that both human kidney and liver have significant capacity to catalyze DCVG formation, indicating that the initial step of the GSH-dependent pathway is not limiting in the formation of nephrotoxic and nephrocarcinogenic metabolites.  (+info)

Exposure to trichloroethylene I. Uptake and distribution in man. (3/423)

Fifteen healthy male subjects were exposed to about 540 and 1,080 mg/m3 of trichloroethylene (TRI) in the air during rest and exercise on a bicycle ergometer. Each subject was exposed during four 30-min periods. The arterial blood concentration increased linearly with the concentration in the alveolar air. The uptake of TRI was about 55% of the supplied amount at rest. At a work load of 150 W during the fourth period the percentage uptake decreased to about 25%. For one fairly thin subject the uptake was near zero at the end of exposure. This development was probably due to the relatively low solubility of TRI in blood and tissues. The uptake of TRI may be estimated from pulmonary ventilation and the concentration in alveolar and inspiratory air.  (+info)

Exposure to trichloroethylene II. Metabolites in blood and urine. (4/423)

Fifteen men were exposed to trichloroethylene (TRI) in three different ways with regard to the concentration of TRI in the air as well as exercise on a bicycle ergometer. The total amount of TRI supplied and taken up by each person was measured. The concentrations of trichloroethanol (TCE) and trichloroacetic acid (TCA) were determined in blood and urine. In spite of large differences in uptake, there were only small differences in the concentration of TCA in blood during the day of exposure. There was a large scatter for the values of TCA in urine within each group. The concentration of TCE in arterial blood increased during exposure. Thereafter the concentrations were almost constant for 2 h and differed among the groups. These results can be interpreted as being due to balanced rates of the formation and elimination of TCE. The levels mentioned were related to the uptake of TRI. The same was found for the rate of excretion of TCE in urine when calculations were made from the morning sample obtained the day after exposure.  (+info)

Exposure to trichloroethylene III. Psychological functions. (5/423)

The effect of exposure to the solvent trichloroethylene (TRI) on the performance of tests of numerical ability, reaction time (simple and choice), and short-term memory was studied in 15 healthy male subjects. The subjects were tested individually on three different occasions during exposure to 540 and 1,080 mg/m3 of TRI in inspiratory air and under control conditions, respectively. At predetermined times during the three 70-min exposure periods, samples were taken of the subjects' alveolar air. Neither the reaction time tests nor the short-term memory test showed any signs of performance decrement during exposure to TRI as compared to those administered under control conditions. However, a statistically significant decrement in performance was obtained on the test of numerical ability during exposure to TRI. The results as a whole indicate that there should not be any risk of an acute effect on central nervous functions at concentrations which do not considerably exceed the Swedish threshold limit value for the solvent (160 mg/m3).  (+info)

The effect of peroxisome proliferators on mitochondrial bioenergetics. (6/423)

Peroxisome proliferators are a group of structurally diverse chemicals that cause the proliferation of peroxisomes in rodents. The purpose of this investigation was to test the hypothesis that the shared effect of these compounds on peroxisome proliferation is mediated through a common inhibitory effect on mitochondrial bioenergetics. Freshly isolated rat liver mitochondria were energized with succinate. The effect of the chemicals on mitochondrial bioenergetics was analyzed by monitoring calcium-induced changes in membrane potential and swelling, as well as changes in mitochondrial respiration. Mitochondrial membrane potential was measured with a TPP(+)-sensitive electrode, and swelling was recorded spectrophotometrically. Mitochondrial oxygen uptake was monitored with a Clark-type oxygen electrode. Gemfibrozil and WY-14,643 induced the mitochondrial permeability transition as characterized by calcium-induced swelling and depolarization of membrane potential, both of which were inhibited by cyclosporine A. Fenofibrate, clofibrate, ciprofibrate and diethylhexyl phthalate, on the other hand, caused a direct dose-dependent depolarization of mitochondrial membrane potential. However, the mechanism of membrane depolarization varied among the test chemicals. Bezafibrate and trichloroethylene elicited no effect on succinate-supported mitochondrial bioenergetics. The results of this investigation demonstrate that although most, but not all, peroxisome proliferators interfere with mitochondrial bioenergetics, the specific biomolecular mechanism differs among the individual compounds.  (+info)

Some characteristics of bacteria found in a bioreactor to treat trichloroethylene-contaminated groundwater. (7/423)

A mixture of bacteria, having a methane-utilizing ability, was separated from a bioreactor supplied with air and methane gas. The bioreactor was operated to treat trichloroethylene (TCE)-contaminated groundwater. The mixture was composed of an obligate methane-utilizing bacterium and a heterotroph, identified as Methylomonas methanica and Pseudomonas sp., respectively. The mixed culture of these two strains removed TCE. In addition, it appeared that a cooperative metabolic interaction of these strains enabled Meth.methanica to maintain the TCE degradation ability.  (+info)

Trichloroethylene exposure and specific somatic mutations in patients with renal cell carcinoma. (8/423)

BACKGROUND: The development of renal cell carcinoma (RCC) has been associated with both genetic and environmental factors-with mutations in the von Hippel-Lindau (VHL) tumor suppressor gene for clear-cell RCC specifically and with long-term exposure to high doses of trichloroethylene (TRI), an industrially important solvent, for RCC generally. We investigated whether TRI exposure produces RCC through a specific mutational effect on the VHL gene by analyzing VHL sequences in the RCCs of patients exposed to high, cumulative doses of TRI. METHODS: The level of exposure for each of 44 patients with RCC who had known industrial exposure to TRI was classified according to the duration, frequency, and mode of exposure. Samples of normal and cancerous tissues were microdissected from paraffin-embedded tissue. DNA was isolated from these samples, and somatic VHL mutations were identified by polymerase chain reaction analysis, single-strand conformation polymorphism analysis, DNA sequencing, and restriction enzyme digestion. Control samples included RCC DNA from 107 patients without known TRI exposure and lymphocyte DNA from 97 healthy subjects. RESULTS: RCCs of TRI-exposed patients showed somatic VHL mutations in 33 (75%) of 44 cases. The mutations were frequently multiple and accompanied by loss of heterozygosity, and there was an association between the number of mutations and the severity of TRI exposure. We observed a specific mutational hot spot at VHL nucleotide 454 in the RCCs of 13 (39%) of the patients, and this mutation was present in adjacent non-neoplastic kidney parenchyma in four of these patients. The nucleotide 454 mutation was neither detected in any of the RCCs from patients without TRI exposure nor in any of the healthy subjects. CONCLUSION: Our results suggest that RCC in patients with high, cumulative TRI exposure is associated with a unique mutation pattern in the VHL gene.  (+info)

Trichloroethylene (TCE) is a volatile, colorless liquid with a chloroform-like odor. In the medical field, it is primarily used as a surgical anesthetic and an analgesic. However, its use in medicine has significantly decreased due to the availability of safer alternatives.

In a broader context, TCE is widely used in various industries as a solvent for cleaning metal parts, degreasing fabrics and other materials, and as a refrigerant. It's also present in some consumer products like paint removers, adhesives, and typewriter correction fluids.

Prolonged or repeated exposure to TCE can lead to various health issues, including neurological problems, liver and kidney damage, and an increased risk of certain cancers. Therefore, its use is regulated by environmental and occupational safety agencies worldwide.

Trichloroethanes are not a medical term, but rather a group of chemical compounds that include 1,1,1-trichloroethane and 1,1,2-trichloroethane. These chemicals have been used as solvents, degreasing agents, and refrigerants.

1,1,1-Trichloroethane, also known as methyl chloroform, is a colorless liquid with a sweet, mild odor. It has been used as a solvent for cleaning electronic components, removing adhesives, and degreasing metals. It can also be found in some consumer products such as spray paints, aerosol cleaners, and spot removers.

1,1,2-Trichloroethane, also known as aerothane, is a colorless liquid with a mild sweet odor. It has been used as a solvent for cleaning and degreasing metals, plastics, and other surfaces. It can also be found in some consumer products such as typewriter correction fluids and spot removers.

Exposure to trichloroethanes can occur through inhalation, skin contact, or ingestion. Short-term exposure to high levels of these chemicals can cause irritation of the eyes, nose, throat, and lungs, dizziness, headache, and nausea. Long-term exposure to lower levels can lead to liver and kidney damage, neurological effects, and an increased risk of cancer.

It is important to handle trichloroethanes with care and follow proper safety precautions, including using appropriate personal protective equipment (PPE) such as gloves, goggles, and respirators, and ensuring adequate ventilation in the work area.

Chloral hydrate is a sedative and hypnotic medication, which means it can help to promote sleep and reduce anxiety. It is a type of compound called a chloral derivative and works by increasing the activity of a neurotransmitter in the brain called gamma-aminobutyric acid (GABA), which has a calming effect on the nervous system.

Chloral hydrate is available in various forms, including tablets, capsules, and liquid solutions. It is typically used for short-term treatment of insomnia or anxiety, but it may also be used for other purposes as determined by a healthcare provider.

Like all medications, chloral hydrate can have side effects, which can include dizziness, headache, stomach upset, and changes in behavior or mood. It is important to use this medication only as directed by a healthcare provider and to report any unusual symptoms or concerns promptly.

Dichloroethylenes are a group of chemical compounds that contain two chlorine atoms and two hydrogen atoms bonded to a pair of carbon atoms. The two carbon atoms are arranged in a double-bonded configuration, resulting in a geometric isomerism known as cis-trans isomerism.

Therefore, there are two main types of dichloroethylenes:

1. cis-1,2-Dichloroethylene (also known as (Z)-1,2-dichloroethylene): This is a colorless liquid with a mild sweet odor. It is used as a solvent and in the production of other chemicals.
2. trans-1,2-Dichloroethylene (also known as (E)-1,2-dichloroethylene): This is also a colorless liquid with a mild sweet odor. It is used as a refrigerant, solvent, and in the production of other chemicals.

Both cis- and trans-1,2-dichloroethylenes can be harmful if ingested, inhaled, or come into contact with the skin. They can cause irritation to the eyes, nose, throat, and lungs, and prolonged exposure can lead to more serious health effects such as damage to the liver and kidneys.

Tetrachloroethylene, also known as perchloroethylene or "perc," is an organic compound with the formula C2Cl4. It is a colorless, volatile liquid with a sweet and somewhat unpleasant smell and taste. It is widely used for dry cleaning of clothing and textiles, and as a solvent in various industrial applications.

In a medical context, tetrachloroethylene is primarily known as a potential occupational hazard and environmental contaminant. Exposure to high levels of this chemical can cause a range of adverse health effects, including irritation of the eyes, nose, and throat, dizziness, headaches, and respiratory problems. Long-term exposure has been linked to an increased risk of certain types of cancer, such as bladder, kidney, and non-Hodgkin lymphoma.

It is important for individuals who work with tetrachloroethylene or are exposed to it in their environment to take appropriate precautions to minimize their exposure and protect their health. This may include using proper ventilation, wearing protective equipment, and following established safety protocols.

Ethylene chlorohydrin is a chemical compound with the formula C2H4Cl2O. It is a colorless liquid with an ether-like odor and is used as a solvent and a chemical intermediate in the production of other chemicals. Ethylene chlorohydrin is produced by the reaction of ethylene oxide with hydrochloric acid.

In medical terms, ethylene chlorohydrin is not commonly used or encountered. However, it is classified as a hazardous substance and can be harmful if swallowed, inhaled, or comes into contact with the skin. It can cause irritation to the eyes, skin, and respiratory tract, and prolonged exposure may lead to more serious health effects such as damage to the nervous system and internal organs.

If you suspect that you have been exposed to ethylene chlorohydrin, it is important to seek medical attention immediately and to follow any recommended treatment or safety precautions.

Trichloroacetic Acid (TCA) is not typically defined in the context of medical terminology, but rather it is a chemical compound used in various medical and cosmetic applications.

Medically, TCA is often used as a chemical agent for peels to treat various skin conditions such as acne, sun damage, age spots, fine lines, and wrinkles. It works by causing the top layers of the skin to dry up and peel off, revealing smoother, more even-toned skin underneath.

The medical definition of Trichloroacetic Acid is:
A colorless crystalline compound, used as a chemical peel in dermatology for various skin conditions, that works by causing the top layers of the skin to dry up and peel off. It is also used as a fixative in histological preparations and as an antiseptic and disinfectant. The chemical formula for TCA is C2HCl3O2.

Solvents, in a medical context, are substances that are capable of dissolving or dispersing other materials, often used in the preparation of medications and solutions. They are commonly organic chemicals that can liquefy various substances, making it possible to administer them in different forms, such as oral solutions, topical creams, or injectable drugs.

However, it is essential to recognize that solvents may pose health risks if mishandled or misused, particularly when they contain volatile organic compounds (VOCs). Prolonged exposure to these VOCs can lead to adverse health effects, including respiratory issues, neurological damage, and even cancer. Therefore, it is crucial to handle solvents with care and follow safety guidelines to minimize potential health hazards.

Environmental biodegradation is the breakdown of materials, especially man-made substances such as plastics and industrial chemicals, by microorganisms such as bacteria and fungi in order to use them as a source of energy or nutrients. This process occurs naturally in the environment and helps to break down organic matter into simpler compounds that can be more easily absorbed and assimilated by living organisms.

Biodegradation in the environment is influenced by various factors, including the chemical composition of the substance being degraded, the environmental conditions (such as temperature, moisture, and pH), and the type and abundance of microorganisms present. Some substances are more easily biodegraded than others, and some may even be resistant to biodegradation altogether.

Biodegradation is an important process for maintaining the health and balance of ecosystems, as it helps to prevent the accumulation of harmful substances in the environment. However, some man-made substances, such as certain types of plastics and industrial chemicals, may persist in the environment for long periods of time due to their resistance to biodegradation, leading to negative impacts on wildlife and ecosystems.

In recent years, there has been increasing interest in developing biodegradable materials that can break down more easily in the environment as a way to reduce waste and minimize environmental harm. These efforts have led to the development of various biodegradable plastics, coatings, and other materials that are designed to degrade under specific environmental conditions.

Methylococcaceae is a family of bacteria that have the ability to oxidize methane as their source of carbon and energy. These bacteria are also known as methanotrophs. They are gram-negative, aerobic, and typically occur in freshwater and marine environments. The family includes several genera such as Methylococcus, Methylomonas, and Methylothermus. These bacteria play an important role in the global carbon cycle by converting methane, a potent greenhouse gas, into carbon dioxide.

Toluene is not a medical condition or disease, but it is a chemical compound that is widely used in various industrial and commercial applications. Medically, toluene can be relevant as a substance of abuse due to its intoxicating effects when inhaled or sniffed. It is a colorless liquid with a distinctive sweet aroma, and it is a common solvent found in many products such as paint thinners, adhesives, and rubber cement.

In the context of medical toxicology, toluene exposure can lead to various health issues, including neurological damage, cognitive impairment, memory loss, nausea, vomiting, and hearing and vision problems. Chronic exposure to toluene can also cause significant harm to the developing fetus during pregnancy, leading to developmental delays, behavioral problems, and physical abnormalities.

Chlorinated hydrocarbons are a group of organic compounds that contain carbon (C), hydrogen (H), and chlorine (Cl) atoms. These chemicals are formed by replacing one or more hydrogen atoms in a hydrocarbon molecule with chlorine atoms. The properties of chlorinated hydrocarbons can vary widely, depending on the number and arrangement of chlorine and hydrogen atoms in the molecule.

Chlorinated hydrocarbons have been widely used in various industrial applications, including as solvents, refrigerants, pesticides, and chemical intermediates. Some well-known examples of chlorinated hydrocarbons are:

1. Methylene chloride (dichloromethane) - a colorless liquid with a mild sweet odor, used as a solvent in various industrial applications, including the production of pharmaceuticals and photographic films.
2. Chloroform - a heavy, volatile, and sweet-smelling liquid, used as an anesthetic in the past but now mainly used in chemical synthesis.
3. Carbon tetrachloride - a colorless, heavy, and nonflammable liquid with a mildly sweet odor, once widely used as a solvent and fire extinguishing agent but now largely phased out due to its ozone-depleting properties.
4. Vinyl chloride - a flammable, colorless gas, used primarily in the production of polyvinyl chloride (PVC) plastic and other synthetic materials.
5. Polychlorinated biphenyls (PCBs) - a group of highly stable and persistent organic compounds that were widely used as coolants and insulating fluids in electrical equipment but are now banned due to their toxicity and environmental persistence.

Exposure to chlorinated hydrocarbons can occur through inhalation, skin contact, or ingestion, depending on the specific compound and its physical state. Some chlorinated hydrocarbons have been linked to various health effects, including liver and kidney damage, neurological disorders, reproductive issues, and cancer. Therefore, proper handling, use, and disposal of these chemicals are essential to minimize potential health risks.

Chloroform is a volatile, clear, and nonflammable liquid with a mild, sweet, and aromatic odor. Its chemical formula is CHCl3, consisting of one carbon atom, one hydrogen atom, and three chlorine atoms. Chloroform is a trihalomethane, which means it contains three halogens (chlorine) in its molecular structure.

In the medical field, chloroform has been historically used as an inhaled general anesthetic agent due to its ability to produce unconsciousness and insensibility to pain quickly. However, its use as a surgical anesthetic has largely been abandoned because of several safety concerns, including its potential to cause cardiac arrhythmias, liver and kidney damage, and a condition called "chloroform hepatopathy" with prolonged or repeated exposure.

Currently, chloroform is not used as a therapeutic agent in medicine but may still be encountered in laboratory settings for various research purposes. It's also possible to find traces of chloroform in drinking water due to its formation during the disinfection process using chlorine-based compounds.

Oxygenases are a class of enzymes that catalyze the incorporation of molecular oxygen (O2) into their substrates. They play crucial roles in various biological processes, including the biosynthesis of many natural products, as well as the detoxification and degradation of xenobiotics (foreign substances).

There are two main types of oxygenases: monooxygenases and dioxygenases. Monooxygenases introduce one atom of molecular oxygen into a substrate while reducing the other to water. An example of this type of enzyme is cytochrome P450, which is involved in drug metabolism and steroid hormone synthesis. Dioxygenases, on the other hand, incorporate both atoms of molecular oxygen into their substrates, often leading to the formation of new carbon-carbon bonds or the cleavage of existing ones.

It's important to note that while oxygenases are essential for many life-sustaining processes, they can also contribute to the production of harmful reactive oxygen species (ROS) during normal cellular metabolism. An imbalance in ROS levels can lead to oxidative stress and damage to cells and tissues, which has been linked to various diseases such as cancer, neurodegeneration, and cardiovascular disease.

Chemical water pollutants refer to harmful chemicals or substances that contaminate bodies of water, making them unsafe for human use and harmful to aquatic life. These pollutants can come from various sources, including industrial and agricultural runoff, sewage and wastewater, oil spills, and improper disposal of hazardous materials.

Examples of chemical water pollutants include heavy metals (such as lead, mercury, and cadmium), pesticides and herbicides, volatile organic compounds (VOCs), polychlorinated biphenyls (PCBs), and petroleum products. These chemicals can have toxic effects on aquatic organisms, disrupt ecosystems, and pose risks to human health through exposure or consumption.

Regulations and standards are in place to monitor and limit the levels of chemical pollutants in water sources, with the aim of protecting public health and the environment.

Dichloroacetic acid (DCA) is a chemical compound with the formula CCl2CO2H. It is a colorless liquid that is used as a reagent in organic synthesis and as a laboratory research tool. DCA is also a byproduct of water chlorination and has been found to occur in low levels in some chlorinated drinking waters.

In the medical field, DCA has been studied for its potential anticancer effects. Preclinical studies have suggested that DCA may be able to selectively kill cancer cells by inhibiting the activity of certain enzymes involved in cell metabolism. However, more research is needed to determine whether DCA is safe and effective as a cancer treatment in humans.

It is important to note that DCA is not currently approved by regulatory agencies such as the U.S. Food and Drug Administration (FDA) for use as a cancer treatment. It should only be used in clinical trials or under the supervision of a qualified healthcare professional.

Vinyl Chloride is not a medical term, but rather a chemical compound. It's an organochloride with the formula C2H3Cl, and it's a colorless gas at room temperature that is used primarily in the production of polyvinyl chloride (PVC) plastics.

However, Vinyl Chloride is relevant to medical professionals because exposure to this compound has been linked to an increased risk of a rare form of liver cancer called hepatic angiosarcoma, as well as other health problems such as neurological damage and immune system suppression. Therefore, occupational exposure to Vinyl Chloride is regulated by organizations like the Occupational Safety and Health Administration (OSHA) in the United States.

Carcinogens are agents that can cause cancer. According to the National Institute of Environmental Health Sciences (NIEHS), environmental carcinogens refer to "cancer-causing agents that people encounter in their daily lives, including substances or exposures in air, water, food, and in the workplace." These carcinogens can increase the risk of cancer by damaging DNA or interfering with cellular processes that control growth.

Examples of environmental carcinogens include:

* Air pollution: Certain pollutants in the air, such as diesel exhaust particles and secondhand smoke, have been linked to an increased risk of lung cancer.
* Radon: A naturally occurring radioactive gas that can accumulate in homes and other buildings, radon is the second leading cause of lung cancer in the United States.
* UV radiation: Exposure to ultraviolet (UV) radiation from the sun or tanning beds can lead to skin cancer.
* Certain chemicals: Some chemicals found in the workplace or in consumer products, such as asbestos, benzene, and vinyl chloride, have been linked to an increased risk of cancer.
* Infectious agents: Certain viruses, bacteria, and parasites can increase the risk of cancer. For example, human papillomavirus (HPV) is a major cause of cervical cancer, and hepatitis B and C viruses are leading causes of liver cancer.

It's important to note that exposure to environmental carcinogens does not guarantee that a person will develop cancer. The risk depends on many factors, including the level and duration of exposure, as well as individual susceptibility. However, reducing exposure to these agents can help reduce the overall risk of cancer.

Phenol, also known as carbolic acid, is an organic compound with the molecular formula C6H5OH. It is a white crystalline solid that is slightly soluble in water and has a melting point of 40-42°C. Phenol is a weak acid, but it is quite reactive and can be converted into a variety of other chemicals.

In a medical context, phenol is most commonly used as a disinfectant and antiseptic. It has a characteristic odor that is often described as "tarry" or " medicinal." Phenol is also used in some over-the-counter products, such as mouthwashes and throat lozenges, to help kill bacteria and freshen breath.

However, phenol is also a toxic substance that can cause serious harm if it is swallowed, inhaled, or absorbed through the skin. It can cause irritation and burns to the eyes, skin, and mucous membranes, and it can damage the liver and kidneys if ingested. Long-term exposure to phenol has been linked to an increased risk of cancer.

Because of its potential for harm, phenol is regulated as a hazardous substance in many countries, and it must be handled with care when used in medical or industrial settings.

Occupational dermatitis is a specific type of contact dermatitis that results from exposure to certain substances or conditions in the workplace. It can be caused by direct contact with chemicals, irritants, or allergens present in the work environment. This condition typically affects the skin on the hands and forearms but can also involve other areas of the body, depending on the nature of the exposure.

There are two main types of occupational dermatitis:

1. Irritant contact dermatitis (ICD): This type occurs when the skin comes into direct contact with an irritating substance, leading to redness, swelling, itching, and sometimes blistering. Common irritants include solvents, detergents, oils, and other industrial chemicals.
2. Allergic contact dermatitis (ACD): This type is a result of an allergic reaction to a specific substance. The immune system identifies the allergen as harmful and mounts a response, causing skin inflammation. Common allergens include latex, metals (such as nickel), and certain plants (like poison ivy).

Prevention measures for occupational dermatitis include using appropriate personal protective equipment (PPE) like gloves, masks, and aprons, as well as practicing good hygiene, such as washing hands regularly and avoiding touching the face with contaminated hands. If you suspect you have developed occupational dermatitis, consult a healthcare professional for proper diagnosis and treatment.

Halogenated hydrocarbons are organic compounds containing carbon (C), hydrogen (H), and one or more halogens, such as fluorine (F), chlorine (Cl), bromine (Br), or iodine (I). These compounds are formed when halogens replace one or more hydrogen atoms in a hydrocarbon molecule.

Halogenated hydrocarbons can be further categorized into two groups:

1. Halogenated aliphatic hydrocarbons: These include alkanes, alkenes, and alkynes with halogen atoms replacing hydrogen atoms. Examples include chloroform (trichloromethane, CHCl3), methylene chloride (dichloromethane, CH2Cl2), and trichloroethylene (C2HCl3).
2. Halogenated aromatic hydrocarbons: These consist of aromatic rings, such as benzene, with halogen atoms attached. Examples include chlorobenzene (C6H5Cl), bromobenzene (C6H5Br), and polyhalogenated biphenyls like polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs).

Halogenated hydrocarbons have various industrial applications, including use as solvents, refrigerants, fire extinguishing agents, and intermediates in chemical synthesis. However, some of these compounds can be toxic, environmentally persistent, and bioaccumulative, posing potential health and environmental risks.

Occupational exposure refers to the contact of an individual with potentially harmful chemical, physical, or biological agents as a result of their job or occupation. This can include exposure to hazardous substances such as chemicals, heavy metals, or dusts; physical agents such as noise, radiation, or ergonomic stressors; and biological agents such as viruses, bacteria, or fungi.

Occupational exposure can occur through various routes, including inhalation, skin contact, ingestion, or injection. Prolonged or repeated exposure to these hazards can increase the risk of developing acute or chronic health conditions, such as respiratory diseases, skin disorders, neurological damage, or cancer.

Employers have a legal and ethical responsibility to minimize occupational exposures through the implementation of appropriate control measures, including engineering controls, administrative controls, personal protective equipment, and training programs. Regular monitoring and surveillance of workers' health can also help identify and prevent potential health hazards in the workplace.

Methane is not a medical term, but it is a chemical compound that is often mentioned in the context of medicine and health. Medically, methane is significant because it is one of the gases produced by anaerobic microorganisms during the breakdown of organic matter in the gut, leading to conditions such as bloating, cramping, and diarrhea. Excessive production of methane can also be a symptom of certain digestive disorders like irritable bowel syndrome (IBS) and small intestinal bacterial overgrowth (SIBO).

In broader terms, methane is a colorless, odorless gas that is the primary component of natural gas. It is produced naturally by the decomposition of organic matter in anaerobic conditions, such as in landfills, wetlands, and the digestive tracts of animals like cows and humans. Methane is also a potent greenhouse gas with a global warming potential 25 times greater than carbon dioxide over a 100-year time frame.

In medical terms, "ether" is an outdated term that was used to refer to a group of compounds known as diethyl ethers. The most common member of this group, and the one most frequently referred to as "ether," is diethyl ether, also known as sulfuric ether or simply ether.

Diethyl ether is a highly volatile, flammable liquid that was once widely used as an anesthetic agent in surgical procedures. It has a characteristic odor and produces a state of unconsciousness when inhaled, allowing patients to undergo surgery without experiencing pain. However, due to its numerous side effects, such as nausea, vomiting, and respiratory depression, as well as the risk of explosion or fire during use, it has largely been replaced by safer and more effective anesthetic agents.

It's worth noting that "ether" also has other meanings in different contexts, including a term used to describe a substance that produces a feeling of detachment from reality or a sense of unreality, as well as a class of organic compounds characterized by the presence of an ether group (-O-, a functional group consisting of an oxygen atom bonded to two alkyl or aryl groups).

Burkholderia cepacia is a gram-negative, motile bacillus that is commonly found in the environment, particularly in water and soil. It is a conditional pathogen, meaning it can cause infection in individuals with weakened immune systems or underlying lung conditions such as cystic fibrosis.

Infections caused by B. cepacia can be difficult to treat due to its resistance to many antibiotics. The bacteria can colonize the lungs and cause a chronic respiratory infection that can lead to decline in lung function, increased frequency of exacerbations, and even death in some cases. It is also associated with outbreaks in healthcare settings, particularly in patients receiving respiratory therapy or using contaminated medical equipment.

It's important to note that B. cepacia is not typically considered a community-acquired pathogen and is not commonly associated with typical pneumonia or other respiratory infections in healthy individuals.

Methoxyflurane is a sweet-smelling, volatile liquid that is used as an inhalational general anesthetic agent. It is chemically described as 2,2-dichloro-1,1-difluoro-1-methoxyethane. Methoxyflurane is a fluorinated hydrocarbon with low blood/gas solubility, which allows for rapid induction and emergence from anesthesia. It has been used for the induction and maintenance of anesthesia in both adults and children. However, its use has been limited due to concerns about nephrotoxicity associated with high concentrations or prolonged exposure.

Occupational medicine is a branch of clinical medicine that deals with the prevention and management of diseases and injuries that may arise in the workplace or as a result of work-related activities. It involves evaluating the health risks associated with various jobs, recommending measures to reduce these risks, providing medical care for workers who become ill or injured on the job, and promoting overall health and wellness in the workplace. Occupational medicine physicians may also be involved in developing policies and procedures related to workplace safety, disability management, and return-to-work programs. The ultimate goal of occupational medicine is to help ensure that workers are able to perform their jobs safely and effectively while maintaining their overall health and well-being.

Environmental pollutants are defined as any substances or energy (such as noise, heat, or light) that are present in the environment and can cause harm or discomfort to humans or other living organisms, or damage the natural ecosystems. These pollutants can come from a variety of sources, including industrial processes, transportation, agriculture, and household activities. They can be in the form of gases, liquids, solids, or radioactive materials, and can contaminate air, water, and soil. Examples include heavy metals, pesticides, volatile organic compounds (VOCs), particulate matter, and greenhouse gases.

It is important to note that the impact of environmental pollutants on human health and the environment can be acute (short-term) or chronic (long-term) and it depends on the type, concentration, duration and frequency of exposure. Some common effects of environmental pollutants include respiratory problems, cancer, neurological disorders, reproductive issues, and developmental delays in children.

It is important to monitor, control and reduce the emissions of these pollutants through regulations, technology advancements, and sustainable practices to protect human health and the environment.

The branch of transportation concerned with flying aircraft, including the design, development, production, and operation of airplanes, helicopters, and other flying machines. In a medical context, aviation may refer to the study of the effects of flight on the human body, particularly in relation to pilot health and safety, or to the medical aspects of aviation, such as aeromedical evacuation and transportation of patients by air.

Chlorohydrins are a class of chemical compounds that contain both chlorine and hydroxyl (-OH) groups. They are typically formed by the reaction of an aldehyde or ketone with a hypochlorous acid or chlorine in a process called halogenation. Chlorohydrins can be toxic and have been associated with various health effects, including irritation of the eyes, skin, and respiratory tract, and potential damage to the liver and kidneys. They are used in some industrial applications, such as the production of certain chemicals and pharmaceuticals, but their use is subject to regulations due to their potential hazards.

Chemical water pollution is the contamination of water bodies (such as lakes, rivers, oceans, and groundwater) with harmful chemicals or substances that negatively impact water quality and pose a threat to human health, aquatic life, and the environment. These chemical pollutants can come from various sources, including industrial and agricultural activities, waste disposal, oil spills, and chemical accidents. Examples of chemical pollutants include heavy metals (such as mercury, lead, and cadmium), pesticides, volatile organic compounds (VOCs), polychlorinated biphenyls (PCBs), and other hazardous substances. These chemicals can have toxic, carcinogenic, mutagenic, or teratogenic effects on living organisms and can disrupt ecosystems, leading to decreased biodiversity and impaired ecological functions.

Cytochrome P-450 CYP2E1 is a specific isoform of the cytochrome P-450 enzyme system, which is involved in the metabolism of various xenobiotics and endogenous compounds. This enzyme is primarily located in the liver and to some extent in other organs such as the lungs, brain, and kidneys.

CYP2E1 plays a significant role in the metabolic activation of several procarcinogens, including nitrosamines, polycyclic aromatic hydrocarbons, and certain solvents. It also contributes to the oxidation of various therapeutic drugs, such as acetaminophen, anesthetics, and anticonvulsants. Overexpression or induction of CYP2E1 has been linked to increased susceptibility to chemical-induced toxicity, carcinogenesis, and alcohol-related liver damage.

The activity of CYP2E1 can be influenced by various factors, including genetic polymorphisms, age, sex, smoking status, and exposure to certain chemicals or drugs. Understanding the regulation and function of this enzyme is crucial for predicting individual susceptibility to chemical-induced toxicities and diseases, as well as for optimizing drug therapy and minimizing adverse effects.

I'm sorry for any confusion, but "Utah" is not a medical term or concept. It is a geographical location, being the 45th state admitted to the United States of America. If you have any questions related to medical topics, I would be happy to try and help answer those for you!

... in the ChemIDplus database FischerSci Trichloroethylene SDS "Trichloroethylene". Immediately Dangerous to ... Trichloroethylene, in the 11th Annual Report of Carcinogens. Wikimedia Commons has media related to Trichloroethylene. US EPA: ... "Trichloroethylene". Sigmaaldrich.com. Retrieved 20 October 2014. "Trichloroethylene". www.chemsrc.com. NIOSH Pocket Guide to ... "Consumer Factsheet on: Trichloroethylene" (PDF). Epa.gov. Retrieved 22 February 2015. "Trichloroethylene Toxicity: Where is ...
"1,1,2-trichloroethylene". California Air Resources Board. Retrieved 31 May 2007. Mingxiang Lou; Oleg A. Mazyar; Mark W. Vaughn ... This page provides supplementary chemical data on trichloroethylene. The handling of this chemical may incur notable safety ...
Trichloroethylene is widely used and unregulated in Turkey, the TCE import was thought to be about 2.16 million dollars in 2020 ... Trichloroethylene (TCE) is a common industrial solvent mostly used for metal degreasing. Due to its wide use in industries, ... Trichloroethylene has been detected in 852 Superfund sites across the United States, according to the Agency for Toxic ... As of June 1, 2023, two U.S. states (Minnesota and New York) have acted on the EPA's findings and banned trichloroethylene in ...
"Trichloroethylene , Technology Transfer Network Air Toxics Web site , US EPA". www3.epa.gov. Retrieved 2016-02-08.{{cite web ... In 1980, two volatile organic compounds (VOCs), trichloroethylene (TCE) and tetrachloroethylene (PCE) were discovered at the ...
Originally, CRREL cold-room facilities used trichloroethylene (TCE) as a refrigerant. At the time there were few known ... "Trichloroethylene (TCE)". Retrieved 11 December 2012. Brubeck, Sarah (27 March 2013), "Contaminant 'Migrating'", Valley News: ...
"Trichloroethylene - an overview , ScienceDirect Topics". Janecke, Ron (2003-06-29). "Powerwash". American City Business ... ". "Fact Sheet on Trichloroethylene (TCE)". 22 September 2015. Treppler, Marc (2000), What You Should Know About Pump Systems ...
Toxicological Profile for Trichloroethylene. Agency for Toxic Substances and Disease Registry. September 1997." Archived ... "EPA External Review Draft: Toxicological Review of Trichloroethylene. October 2009." "ATSDR. ... Workers there were potentially exposed to the industrial solvent trichloroethylene (TCE), classified by the International ...
In animals, exposure to trichloroethylene can impact the liver, nervous system, kidneys, and blood. Trichloroethylene at 24 ppb ... Trichloroethylene can cause scleroderma which is a systemic autoimmune disease that causes joint pain, skin stiffness, and ... The only volatile organic compound found in the water was trichloroethylene at 24 ppb. The Discovery of this chemical in the ... According to the Agency for Toxic Substances and Disease Registry, trichloroethylene can be harmless in very small quantities ...
Trichloroethylene (TCE) is a volatile, colorless liquid organic chemical. TCE does not occur naturally and is created by ... "Trichloroethylene - Cancer-Causing Substances - NCI". www.cancer.gov. 10 December 2018. Retrieved 10 February 2023. ... Commercial dry cleaners also use trichloroethylene as a spot remover. Winegarner, Beth (15 June 2017). "Silicon Valley's Toxic ... Armstrong learned that the Environmental Protection Agency had officially declared trichloroethylene (TCE), a solvent commonly ...
"Risk Management for Trichloroethylene (TCE)". epa.gov. EPA. Retrieved 25 September 2017. "Ethylene Dichloride" (PDF). EPA. ... Some of the chemicals sold there were Trichloroethylene and 1-2-Dichloroethane. These chemicals were being improperly stored ... Some of these chemicals, such as Trichloroethylene, are carcinogenic. Another chemical identified at the site was 1-2- ...
... trichloroethylene and toluene. Waste from the second find also contained cyclohexane and oleamide. Marković was arrested. In ...
Uses Tetrachloroethylene and Trichloroethylene as Electron Acceptors". International Journal of Systematic Bacteriology. 47 (4 ... uses tetrachloroethylene and trichloroethylene as electron acceptors". International Journal of Systematic Bacteriology. 47 (4 ... It uses tetrachloroethylene and trichloroethylene as electron acceptors. Krumholz, L. R. (1997). "Desulfuromonas chloroethenica ...
CFC-112 can be prepared as a mixture with other hydrochlorofluorocarbons from trichloroethylene and anhydrous hydrogen fluoride ... "Experimental Study of Electrochemical Fluorination of Trichloroethylene". Journal of the Electrochemical Society. 129 (12): ...
nov., a new trichloroethylene-degrading bacterium isolated from polluted environments". International Journal of Systematic and ... nov., a new trichloroethylene-degrading bacterium isolated from polluted environments". International Journal of Systematic and ... Janibacter terrae is able to degrade trichloroethylene. Janibacter brevis was originally classified as its own species, but was ...
For instance, it can be formed from trichloroethylene. It is also possible to produce dichloroacetylene from trichloroethylene ... Like trichloroethylene, dichloroacetylene is metabolized to DCVC in vivo. According to the Department of Transportation, it is ... and trichloroethylene, are also present. It is a by-product in the production of vinylidene chloride. ... "Formation of dichloroacetylene from trichloroethylene in the presence of alkaline material--possible cause of intoxication ...
Trichloroethylene (IARC Summary & Evaluation, Volume 106, 2014) (PDF). iarc.fr. Retrieved 2016-03-08. Yang L, Dong J, Jiang S, ... In 2014, the International Agency for Research on Cancer updated its classification of trichloroethylene to Group 1, indicating ...
2023). "Trichloroethylene: An Invisible Cause of Parkinson's Disease?". J Parkinsons Dis. 13 (2): 203-218. doi:10.3233/JPD- ... Environmental risks include exposure to pesticides, and prior head injuries; a history of exposure to trichloroethylene is also ...
Bogen, K.T. (1988). "Pharmacokinetics for regulatory risk analysis: The case of trichloroethylene". Regulatory Toxicology and ...
These chemicals included Benzene, toluene, Trichloroethylene, tetrachloroethylene and chlorobenzene. All of which are ...
Reductive dehalogenation of trichloroethylene: kinetic models and *Hetflejš, J.; Czakkoova, M.; Rericha, R.; Vcelak, J. ...
It is prepared by addition of dichlorocarbene to trichloroethylene. The compound is used to prepare arylpropiolic acids: C3Cl4 ...
Major V, Rosen M, Mushin WW (1966). "Methoxyflurane as an obstetric analgesic: a comparison with trichloroethylene". BMJ. 2 ( ...
Major V, Rosen M, Mushin WW (December 1966). "Methoxyflurane as an obstetric analgesic: a comparison with trichloroethylene". ... and only slightly more somnolence than trichloroethylene. Similar to other inhalational anesthetics, the exact mechanism of ...
Major V, Rosen M, Mushin WW (December 1966). "Methoxyflurane as an obstetric analgesic: a comparison with trichloroethylene". ...
Trichloroethylene (TCE) to degrease pipelines further contaminated the area. Over the years the contaminants entered the ... trichloroethylene (TCE), and vinyl chloride (VC). However, potassium permanganate is unable to efficiently oxidize diesel, ...
Schrick, Bettina; Blough, Jennifer L.; Jones, A. Daniel; Mallouk, Thomas E. (2002). "Hydrodechlorination of Trichloroethylene ...
These chemicals included benzene, PCBs, toluene, trichloroethylene, and trihalogenated methanes. This also lead to the ...
Trichloroethylene is a major byproduct, which is separated by distillation. Worldwide production was about 1 million metric ... Ryoo, D.; Shim, H.; Arenghi, F. L. G.; Barbieri, P.; Wood, T. K. (2001). "Tetrachloroethylene, Trichloroethylene, and ... Doherty, R.E. (2000). "A History of the Production and Use of Carbon Tetrachloride, Tetrachloroethylene, Trichloroethylene and ... Products of biodegradation products include trichloroethylene, cis-1,2-dichloroethene and vinyl chloride; full degradation ...
McKinsey, P.C. (February 20, 2003). "Bioremediation of Trichloroethylene-Contaminated Sediments Augmented with a ...
The RCA facility is the source of significant trichloroethylene contamination. Taoyuan City is divided into 12 municipal ...
  • The two major uses of trichloroethylene are as a solvent to remove grease from metal parts and as a chemical that is used to make other chemicals, especially the refrigerant, HFC-134a. (cdc.gov)
  • One of the major uses of trichloroethylene is its ability to act as a potent solvent to annihilate grease, oils, fats, waxes, and tars from metal surfaces used in oxygen systems. (morganaero.com)
  • The US Environmental Protection Agency (EPA) has proposed a ban on all uses of trichloroethylene (TCE) , a common industrial degreasing solvent considered to be a human carcinogen. (chemistryworld.com)
  • The Biden administration has proposed to ban all uses of trichloroethylene , an industrial solvent used in glues, other adhesives, spot removers and metal cleaners, saying exposure to even small amounts can cause cancer, damage to the central nervous system and other health effects. (cableconnectioninc.com)
  • Trichloroethylene (TCE) is a carcinogenic halocarbon with the formula C2HCl3, commonly used as an industrial degreasing solvent. (wikipedia.org)
  • Trichloroethylene is an effective solvent for a variety of organic materials. (wikipedia.org)
  • Trichloroethylene is used as a solvent for cleaning metal parts. (cdc.gov)
  • Trichloroethylene, an industrial solvent and common groundwater pollutant, damages the immune system, harms the developing fetus and causes cancer. (ewg.org)
  • Trichloroethylene was once commonly used to remove grease from metal parts, such as steel pipes and engines, and as a solvent in dry cleaning and carpet cleaning products. (ewg.org)
  • Trichloroethylene (TCE) is used as a solvent for degreasing metal parts during the manufacture of a variety of products. (mn.us)
  • 14. The chemical compound trichloroethylene is a halocarbon commonly used as an industrial solvent. (so-ella.com)
  • ProSolv ® vapour degreasing solvent is a proprietary tertiary azeotropic formulation developed as a direct "drop In" replacement for trichloroethylene and other chlorinated solvents. (vapour-degreasing.com)
  • Even today, you can find trichloroethylene used as a cleaning solvent by corporations and the military. (ptsdlawyers.com)
  • Trichloroethylene, or tri, is a toxic solvent that is not flammable. (vivochem.com)
  • Typically, trichloroethylene and tetrachloroethylene are collected together and then separated by distillation. (wikipedia.org)
  • Reanalysis of Trichloroethylene and Tetrachloroethylene Metabolism to Glutathione Conjugates Using Human, Rat, and Mouse Liver Models to Improve Precision in Risk Characterization. (stembook.org)
  • This Volume of the IARC Monographs provides an assessment of the carcinogenic hazards associated with exposure to seven chlorinated solvents, including trichloroethylene, tetrachloroethylene, and their metabolites (dichloroacetic acid, trichloroacetic acid, and chloral hydrate). (iarc.fr)
  • Trichloroethylene has been used in several industries, such as manufacture and repair of aircraft and automobiles, and in screw-cutting, while tetrachloroethylene is widely used in dry-cleaning and as a feedstock for the production of chlorinated chemicals. (iarc.fr)
  • Trichloroethylene (TCE) and Tetrachloroethylene (PCE) Exposures and Vapor Intrusion INFORMATION FOR HEALTH PROFESSIONALS This nfi ormatoi n is about very low -el ve lexposures to TCE and PCE due to vapor intrusoi n. (so-ella.com)
  • The reduction of tetrachloroethylene (PCE) and trichloroethylene (TCE) catalyzed by vitamin B12 was examined in homogeneous and heterogeneous (B12 bound to agarose) batch systems using titanium(III) citrate as the bulk reductant. (so-ella.com)
  • Trichloroethylene (TCE) and perchloroethylene or tetrachloroethylene (PCE) are high-production volume chemicals with numerous industrial applications. (so-ella.com)
  • Tetrachloroethylene and trichloroethylene fatality: case report and simple headspace SPME-capillary gas chromatographic determination in tissues. (so-ella.com)
  • the EPA has classified tetrachloroethylene and trichloroethylene as likely to be carcinogenic to humans. (so-ella.com)
  • The coefficient of non-determination (k2) is 4×10 -5 for tetrachloroethylene and 7×10 -5 for trichloroethylene … Effects of Multiple Doses of Dichloroacetate on GSTZ1 Expression and Activity in Liver and Extrahepatic Tissues of Young and Adult Rats. (so-ella.com)
  • Trichloroethylene and other chemicals like tetrachloroethylene or PCE, benzene, vinyl chloride, and more were all found in the drinking water at this US military base . (ptsdlawyers.com)
  • Presumably, Camp Pendleton's water supply was not contaminated with [trichloroethylene] and [tetrachloroethylene]. (neurologylive.com)
  • It is not known whether children are more susceptible than adults to the effects of trichloroethylene. (cdc.gov)
  • A genetically-prone murine lupus model was used to assess the developmental effects of trichloroethylene (TCE) exposure on disease symptom onset (e.g., autoantibody production and proteinuria), lymphocyte proliferation, splenic B-cell populations, and thymic and splenic T-cell populations. (nih.gov)
  • Human health effects of trichloroethylene: key findings and scientific issues. (so-ella.com)
  • What Are the Effects of Trichloroethylene Exposure? (ptsdlawyers.com)
  • Effects of trichloroethylene on behavioral performance capabilities. (cdc.gov)
  • A pharmacokinetic model to study the excretion of trichloroethylene and its metabolites after an inhalation exposure. (bmj.com)
  • For a better understanding of absorption, distribution, excretion, and metabolism of trichloroethylene the time-course of blood concentration of the vapour and urinary excretion of its metabolites was examined using a pharmacokinetic model. (bmj.com)
  • Mutagenicity of trichloroethylene and its metabolites: implications for the risk assessment of trichloroethylene. (so-ella.com)
  • Trichloroethylene is a good analgesic at 0.35 to 0.5% concentrations. (wikipedia.org)
  • Businesses that have used trichloroethylene or commercial buildings and homes near facilities that have utilized TCE, may have elevated concentrations present in the groundwater and soil beneath the structures. (lifetimeradonmitigation.com)
  • In the long term - such as after repeated exposure to high concentrations of trichloroethylene - individuals may experience symptoms like muscle weakness, slurred speech, short-term memory loss, lack of coordination, and blurred vision. (ptsdlawyers.com)
  • One example was Trichloroethylene (TCE) and Reproductive Risk developed in 2015, this Health Alert communicates the risks presented to pregnant women and women of reproductive age when TCE air concentrations are even below the OSHA Permissible Exposure Level (PEL). (cdc.gov)
  • This study attributes the high rate of the disease among victims of Camp Lejeune to potential exposure to trichloroethylene, a chemical commonly used in certain industrial processes. (sullivanandkehoe.com)
  • Was There Potential Exposure To Trichloroethylene in the Military? (ptsdlawyers.com)
  • I wanted to first highlight some of the work that has come out and gotten a large amount of media attention around Camp Lejeune and specifically trichloroethylene (TCE) as a cause of Parkinson's, and one of the environmental toxins that we talk about as something that is in pretty much everywhere. (medscape.com)
  • Were Veterans Exposed To Trichloroethylene at Camp Lejeune? (ptsdlawyers.com)
  • While any service member may have been exposed to trichloroethylene and developed health publications later on, those who served at Camp Lejeune are more likely to have suffered severe exposure. (ptsdlawyers.com)
  • As a result, Veterans who developed cancer because of trichloroethylene exposure at Camp Lejeune are qualified to seek disability benefits from the Department of Veterans Affairs. (ptsdlawyers.com)
  • Profile for Trichloroethylene (Draft for Public Comment). (cdc.gov)
  • This Public Health Statement is the summary chapter from the Toxicological Profile for trichloroethylene . (cdc.gov)
  • Title : Addendum to the Toxicological profile for trichloroethylene Corporate Authors(s) : United States. (cdc.gov)
  • Legislation has forced the replacement of trichloroethylene in many processes in Europe as the chemical was classified as a carcinogen carrying an R45 risk phrase, May cause cancer. (wikipedia.org)
  • First, acetylene was treated with chlorine using a ferric chloride catalyst at 90 °C to produce 1,1,2,2-tetrachloroethane according to the chemical equation: HC≡CH + 2 Cl2 → Cl2CHCHCl2 The 1,1,2,2-tetrachloroethane is then dehydrochlorinated to give trichloroethylene. (wikipedia.org)
  • If you work in an industry that uses trichloroethylene, please read chemical labels and the accompanying Safety Data Sheets for hazard information. (cdc.gov)
  • This Public Health Statement summarizes the Agency for Toxic Substances and Disease Registry's (ATSDR) findings on trichloroethylene, including chemical characteristics, exposure risks, possible health effects from exposure, and ways to limit exposure. (cdc.gov)
  • If you work in the degreasing industry or another industry where trichloroethylene is produced or used, you may be exposed by breathing in trichloroethylene-contaminated air or by contacting the chemical with your skin. (cdc.gov)
  • Information on trichloroethylene (also known as trichloroethene), for use in responding to chemical incidents. (www.gov.uk)
  • Trichloroethylene is a volatile, colorless liquid organic chemical that is most commonly used in the metalworking industry, dry cleaning industry, and the automotive industry. (lifetimeradonmitigation.com)
  • Recently, more information has surfaced about the dangerous chemical Trichloroethylene, or TCE. (dominalaw.com)
  • Pratt, DA & Van Der Donk, WA 2006, ' On the role of alkylcobalamins in the vitamin B 12 -catalyzed reductive dehalogenation of perchloroethylene and trichloroethylene ', Chemical Communications , no. 5, pp. 558-560. (illinois.edu)
  • In addition to Trichloroethylene, we supply more than 450 other chemical products. (vivochem.com)
  • The International Agency for Research on Cancer (IARC) classified trichloroethylene as carcinogenic to humans. (cdc.gov)
  • The EPA has characterized trichloroethylene as carcinogenic to humans by all routes of exposure. (cdc.gov)
  • Trichloroethylene levels in blood of the Registry (ATSDR). (cdc.gov)
  • Trichloroethylene is a clear colorless exposure for workers in degreasing by the dose (how much), the support for trichloroethylene-induced liquid with an ethereal, chloroform-like operations where trichloroethylene is kidney cancer and lesser support for liver duration (how long), and the sweet odor. (cdc.gov)
  • NCI05) Trichloroethylene appears as a clear colorless volatile liquid having a chloroform-like odor. (allwaychemical.com)
  • Trichloroethylene is also known as ethylene trichloride, trichloroethene, and trichlor. (so-ella.com)
  • Agency for Toxic Substances and Disease and Human Health Sciences trichloroethylene. (cdc.gov)
  • Agency for Toxic Substances and Disease Registry offers continuing education through the Environmental Health and Medicine Education - Trichloroethylene Toxicity Course . (mn.us)
  • Trichloroethylene (TCE) is a colorless and nonflammable halocarbon substance that normally dissolves in fat, grease, wax, oil, and tar materials. (ptsdlawyers.com)
  • Trichloroethylene is a known carcinogen. (cdc.gov)
  • Current Intelligence Bulletin 2: Trichloroethylene (TCE) -DHHS (NIOSH) No. 78-127 (1975) Presents information about Trichloroethylene as well as recommendation to treat formaldehyde as a carcinogen. (cdc.gov)
  • The Department of Health and Human Services (DHHS) considers trichloroethylene to be a known human carcinogen. (cdc.gov)
  • C2HCl3 trichloroethylene 1,1,2-Trichloroethene and 1,1-Dichloro-2-Chloroethylene are alternative names. (chemicalchaos.org)
  • The proposed ban is the latest twist in a yearslong debate over whether to regulate trichloroethylene, commonly referred to as TCE. (cableconnectioninc.com)
  • Trichloroethylene (TCE) is a volatile organic compound (VOC) commonly found in many contaminated sites. (uprm.edu)
  • Some men occupationally-exposed to trichloroethylene and other chemicals showed decreases in sex drive, sperm quality, and reproductive hormone levels. (cdc.gov)
  • Trichloroethylene and other volatile organic chemicals may diffuse from contaminated groundwater and soil and migrate into air spaces beneath buildings to enter the indoor air, a process termed vapor intrusion. (cdc.gov)
  • Philadelphia's advanced manufacturing industries, food processing & production, and fabrication of plastics and chemicals rely on potent and highly-effective cleaning for oxygen procedures to get the jobs done, and trichloroethylene cleaning is in the thick of it. (morganaero.com)
  • Many Veterans know about the risks and potential health complications associated with Agent Orange exposure, but others may have been exposed to other chemicals like trichloroethylene. (ptsdlawyers.com)
  • Trichloroethylene is one of the most dangerous chemicals that military personnel may have been exposed to during service. (ptsdlawyers.com)
  • The following resources provide information about occupational exposure to trichloroethylene. (cdc.gov)
  • NIOSH Criteria Documents: Criteria for a Recommended Standard: Occupational Exposure to Trichloroethylene -DHHS (NIOSH) No. 73-11025 (1973) Presents a standard to prevent the adverse effects of exposure to Trichloroethylene over a working lifetime. (cdc.gov)
  • Occupational Safety and Health Guideline for Trichloroethylene -This guideline helps stakeholders conduct effective occupational safety and health programs. (cdc.gov)
  • Occupational exposure to trichloroethylene is associated with excess incidences of liver cancer, kidney cancer and non-Hodgkin lymphoma. (allwaychemical.com)
  • Received May 14, 1997 variability and to use this measure of variability to Using the Monte Carlo method and physiologically derive a safe exposure limit or guidance value for inha- based pharmacokinetic modeling, an occupational in- lation of trichloroethylene (TRI) in an occupational set- halation exposure to trichloroethylene consisting of ting. (cdc.gov)
  • glucuronide, and trichloroacetic acid in Trichloroethylene levels in food are and Disease Registry humans) are mainly excreted in the urine. (cdc.gov)
  • Trichloroethylene, Organic & inorganic gases by extractive FTIR spectrometry (No. 3800) -Sampling and measurement from NMAM, 4th ed. (cdc.gov)
  • Trichloroethylene is a synthetic, light sensitive, volatile, colorless, liquid that is miscible with many non-polar organic solvents. (allwaychemical.com)
  • There is strong evidence that trichloroethylene can cause kidney cancer in people and some evidence for trichloroethylene-induced liver cancer and malignant lymphoma. (cdc.gov)
  • Lifetime exposure to trichloroethylene resulted in increased liver cancer in mice and increased kidney cancer and testicular cancer in rats. (cdc.gov)
  • Trichloroethylene readily enters the air in fat, liver, kidney and lung. (cdc.gov)
  • Drinking trichloroethylene-contaminated drinking water has been linked with birth defects, leukemia, and liver and kidney damage. (ewg.org)
  • Certain cancers have also been linked to chronic trichloroethylene exposure, including kidney, liver, and cervical cancer and non-Hodgkin lymphoma. (ptsdlawyers.com)
  • or each of these agents, carcinogenicity in rats and/or mice, els, differences in exposure con- there was sufficient evidence of car- for example for the liver (aflatoxins, ditions between studies in animals cinogenicity from studies in rats and/ trichloroethylene [TCE], and vinyl and in humans, or limitations in Part 1 · Chapter 1. (who.int)
  • Trichloroethylene is a colorless, volatile liquid. (cdc.gov)
  • Trichloroethylene has been used by the adopted from the chronic-duration textile industry to scour cotton, wool, and inhalation MRL for trichloroethylene. (cdc.gov)
  • Trichloroethylene breaks down very slowly in soil and water and is removed mostly through evaporation to air. (cdc.gov)
  • Most of the trichloroethylene used in the United States is released into the atmosphere by evaporation, primarily from degreasing operations. (cdc.gov)
  • and through its evaporation from trichloroethylene-contaminated soil at landfills. (cdc.gov)
  • Trichloroethane and trichloroethylene are widely used solvents that are ingredients in many products, including typewriter correction fluid ("white-out"), color film cleaners, insecticides, spot removers, fabric-cleaning solutions, adhesives, and paint removers. (so-ella.com)
  • During 1981-1982, the Minnesota Department of Health (MDH) and the Minnesota Pollution Control Agency learned that 41 of 137 private and commercial wells downgradient of an industrial facility were contaminated with trichloroethylene and trichloroethane. (cdc.gov)
  • If you or a loved one believe you have developed a health condition because of trichloroethylene exposure, read on to learn more about acquiring disability benefits. (ptsdlawyers.com)
  • Can You Receive VA Disability Benefits for Trichloroethylene Exposure? (ptsdlawyers.com)
  • At the time of this writing, the VA does provide disability benefits to any Veterans who can prove that they have a condition caused by their exposure to trichloroethylene (or were likely to have been exposed to TCE). (ptsdlawyers.com)
  • Some human studies indicate that trichloroethylene may cause developmental effects such as spontaneous abortion, congenital heart defects, central nervous system defects, and small birth weight. (cdc.gov)
  • How likely is trichloroethylene to cause cancer? (cdc.gov)
  • Trichloroethylene (CICH=CCl 2 ) is a colorless liquid with a chloroform-like odor. (cdc.gov)
  • Trichloroethylene can be released to air, water, and soil at places where it is produced or used. (cdc.gov)
  • Trichloroethylene is widely distributed that has migrated from contaminated soil throughout the body via the blood, specific to trichloroethylene exposure. (cdc.gov)
  • Most trichloroethylene in surface waters or on soil surfaces evaporates into the atmosphere, although its high mobility in soil may result in it moving into groundwater below the soil surface. (cdc.gov)
  • You may be exposed to trichloroethylene from trichloroethylene-contaminated air, water, food, or soil, or direct skin contact. (cdc.gov)
  • You may also be exposed to trichloroethylene by consumption of trichloroethylene-contaminated foods, by contact with consumer products containing trichloroethylene, and by direct contact with trichloroethylene-contaminated soil. (cdc.gov)
  • First, ethylene is chlorinated over a ferric chloride catalyst to produce 1,2-dichloroethane: CH2=CH2 + Cl2 → ClCH2CH2Cl When heated to around 400 °C with additional chlorine, 1,2-dichloroethane is converted to trichloroethylene: ClCH2CH2Cl + 2 Cl2 → ClCH=CCl2 + 3 HCl This reaction can be catalyzed by a variety of substances. (wikipedia.org)
  • It's got six atoms, including two carbon atoms, one hydrogen atom, and three chlorine atoms - hence, its name "trichloroethylene. (medscape.com)
  • The Trichloroethylene TCE market size was estimated at a reasonable million USD in 2021 and expected to reach a healthy million USD in 2022, and is projected to grow at a steady CAGR to get a prominent million USD by 2029. (lhueagleye.com)
  • Groundwater and drinking water contamination from industrial discharge including trichloroethylene is a major concern for human health and has precipitated numerous incidents and lawsuits in the United States. (wikipedia.org)
  • Avoid drinking water from sources that are known to be contaminated with trichloroethylene. (cdc.gov)
  • Under the trade names Trimar and Trilene, trichloroethylene was used as a volatile anesthetic and as an inhaled obstetrical analgesic in millions of patients. (wikipedia.org)
  • Liquid trichloroethylene evaporates quickly into the air. (cdc.gov)
  • The EWG Health Guideline of 0.4 ppb for trichloroethylene was defined by the state of Minnesota as health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. (ewg.org)
  • The use of trichloroethylene in the food and pharmaceutical industries has been banned in much of the world since the 1970s due to concerns about its toxicity. (wikipedia.org)
  • With all this being said, it is trichloroethylene cleaning that ensures oxygen systems remain free of hazardous contaminants. (morganaero.com)
  • Trichloroethylene was discovered by E. Fischer in 1864 by reduction of hexachloroethane with hydrogen. (wikipedia.org)
  • A reliable biomarker is trichloroethylene fo r important sources of exposure to from the lung, gastrointestinal tract, and in exhaled air, blood, or urine. (cdc.gov)
  • This information is important because these future sites may be sources of exposure, and exposure to trichloroethylene may be harmful. (cdc.gov)
  • Are you still using trichloroethylene for vapour degreasing? (vapour-degreasing.com)
  • If you are using trichloroethylene or n-propyl bromide vapour degreasing solvents EnviroTech can offer excellent replacement products developed from 40 years of supplying market leading cleaning solvents to the engineering industries. (vapour-degreasing.com)
  • This relatively short half-life indicates that trichloroethylene is not a persistent atmospheric compound. (cdc.gov)
  • Trichloroethylene was previously used as an inhaled analgesic and a surgical anesthetic before it was banned for these purposes by the FDA in 1977. (ptsdlawyers.com)
  • trichloroethylene is produced or waste products, some of which may be toxic. (cdc.gov)
  • Trichloroethylene was primarily used in degreasing metal equipment and household cleaning products. (ptsdlawyers.com)
  • Which products/segments/applications/areas to invest in over the forecast period in the Global Trichloroethylene TCE Market? (lhueagleye.com)
  • Trichloroethylene, Trichloracetic acid in urine (No. 8322) -Sampling and measurement from NMAM, 4th ed. (cdc.gov)
  • The legal limit for trichloroethylene, established in 1987, was based on analytical detection limits at the time that the standard was set. (ewg.org)