Polycyclic Hydrocarbons, Aromatic
Topical psoriasis therapy. (1/76)Psoriasis is a common dermatosis, affecting from 1 to 3 percent of the population. Until recently, the mainstays of topical therapy have been corticosteroids, tars, anthralins and keratolytics. Recently, however, vitamin D analogs, a new anthralin preparation and topical retinoids have expanded physicians' therapeutic armamentarium. These new topical therapies offer increased hope and convenience to the large patient population with psoriasis. (+info)
Gordonia alkanivorans sp. nov., isolated from tar-contaminated soil. (2/76)Twelve bacterial strains isolated from tar-contaminated soil were subjected to a polyphasic taxonomic study. The strains possessed meso-diaminopimelic acid as the diagnostic diamino acid of the peptidoglycan, MK-9(H2) as the predominant menaquinone, long-chain mycolic acids of the Gordonia-type, straight-chain saturated and monounsaturated fatty acids, and considerable amounts of tuberculostearic acid. The G + C content of the DNA was 68 mol%. Chemotaxonomic and physiological properties and 16S rDNA sequence comparison results indicated that these strains represent a new species of the genus Gordonia. Because of the ability of these strains to use alkanes as a carbon source, the name Gordonia alkanivorans is proposed. The type strain of Gordonia alkanivorans sp. nov. is strain HKI 0136T (= DSM 44369T). (+info)
Systematic review of comparative efficacy and tolerability of calcipotriol in treating chronic plaque psoriasis. (3/76)OBJECTIVES: To evaluate the comparative efficacy and tolerability of topical calcipotriol in the treatment of mild to moderate chronic plaque psoriasis. DESIGN: Quantitative systematic review of randomised controlled trials. SUBJECTS: 6038 patients with plaque psoriasis reported in 37 trials. MAIN OUTCOME MEASURES: Mean difference in percentage change in scores on psoriasis area and severity index, and response rate ratios for both patients' and investigators' overall assessments of marked improvement or better. Adverse effects were estimated with the rate ratio, rate difference, and number needed to treat. RESULTS: Calcipotriol was at least as effective as potent topical corticosteroids, calcitriol, short contact dithranol, tacalcitol, coal tar, and combined coal tar 5%, allantoin 2%, and hydrocortisone 0.5%. Calcipotriol caused significantly more skin irritation than potent topical corticosteroids (number needed to treat to harm for irritation 10, 95% confidence interval 6 to 34). Calcipotriol monotherapy also caused more irritation than calcipotriol combined with a potent topical corticosteroid (6, 4 to 8). However, the number needed to treat for dithranol to produce lesional or perilesional irritation was 4 (3 to 5). On average, treating 23 patients with short contact dithranol led to one more patient dropping out of treatment owing to adverse effects than if they were treated with calcipotriol. CONCLUSIONS: Calcipotriol is an effective treatment for mild to moderate chronic plaque psoriasis, more so than calcitriol, tacalcitol, coal tar, and short contact dithranol. Only potent topical corticosteroids seem to have comparable efficacy at eight weeks. Although calcipotriol caused more skin irritation than topical corticosteroids this has to be balanced against the potential long term effects of corticosteroids. Skin irritation rarely led to withdrawal of calcipotriol treatment. Longer term comparative trials of calcipotriol versus dithranol and topical corticosteroids are needed to see whether these short term benefits are mirrored by long term outcomes such as duration of remission and improvement in quality of life. (+info)
Bioavailability of the genotoxic components in coal tar contaminated soils in Fischer 344 rats. (4/76)The effect of chemical aging on the bioavailability and subsequent genotoxicity of coal tar (CT)-contaminated soils was evaluated in a 17-day feeding study using Fischer 344 male rats. Rats consumed a control diet or diets amended with soil, 0.35% CT, or soil freshly prepared or aged for 9 months with 0.35% CT. Mild treatment-related microscopic lesions in liver tissue and elevated enzyme levels in serum were detected in all CT treatment groups. The (32)P-postlabeling assay was employed to determine DNA adduct formation in treated animals. All CT treatment groups induced DNA adducts in both the liver and lung. Adduct levels were 3-fold higher in lung DNA compared to hepatic DNA. After correcting adduct levels for total ingested polycyclic aromatic hydrocarbons (PAHs), a significant decrease (p < 0.05) in adduct levels was observed in both CT/soil treatment groups compared to CT control in liver and lung DNA. Adduct profiles of (32)P-postlabeled hepatic and lung DNA displayed several nonpolar DNA adducts that comigrated with PAH-adducted calf thymus DNA standards as determined through both thin-layer chromatography (TLC) and high-pressure liquid chromatography (HPLC). These results suggest that soil, but not aging of contaminants in soil, decreases the bioavailability of genotoxic components in CT, as evidenced by DNA adduct analysis. (+info)
DNA adduct measurements, cell proliferation and tumor mutation induction in relation to tumor formation in B6C3F1 mice fed coal tar or benzo[a]pyrene. (5/76)Coal tar is a complex mixture containing hundreds of compounds, at least 30 of which are polycyclic aromatic hydrocarbons, including the carcinogen benzo[a]pyrene (BaP). Although humans are exposed to complex mixtures on a daily basis, the synergistic or individual effects of components within a mixture on the carcinogenic process remain unclear. We have compared DNA adduct formation and cell proliferation in mice fed coal tar or BaP for 4 weeks with tumor formation in a 2 year chronic feeding study. Additionally, we have analyzed tumor DNA for mutations in the K-ras, H-ras and p53 genes. In the forestomach of mice fed either coal tar or BaP an adduct indicative of BaP was detected, with adduct levels increasing in a dose-responsive manner. K-ras mutations were detected in the forestomach tumors, with the incidence being similar in mice fed coal tar or BaP. These results suggest that the BaP within coal tar is associated with forestomach tumor induction in coal tar-fed mice. DNA adduct levels in the small intestine were not predictive of tumor incidence in this tissue; instead, the tumors appeared to result from compound-induced cell proliferation at high doses of coal tar. K-ras mutations were detected in lung tumors. Since lung tumors were not increased by BaP, coal tar components other than BaP appear to be responsible for the tumors induced in this tissue. H-ras mutations, primarily occurring at codon 61, were the most common mutation observed in liver tumors induced by coal tar. Since this mutation profile is observed in spontaneous hepatic tumors, components in the coal tar may be promoting the expansion of pre-existing lesions. (+info)
Naphthalene and donor cell density influence field conjugation of naphthalene catabolism plasmids. (6/76)We examined transfer of naphthalene-catabolic genes from donor microorganisms native to a contaminated site to site-derived, rifampin-resistant recipient bacteria unable to grow on naphthalene. Horizontal gene transfer (HGT) was demonstrated in filter matings using groundwater microorganisms as donors. Two distinct but similar plasmid types, closely related to pDTG1, were retrieved. In laboratory-incubated sediment matings, the addition of naphthalene stimulated HGT. However, recipient bacteria deployed in recoverable vessels in the field site (in situ) did not retrieve plasmids from native donors. Only when plasmid-containing donor cells and naphthalene were added to the in situ mating experiments did HGT occur. (+info)
7H-benzo[c]fluorene: a major DNA adduct-forming component of coal tar. (7/76)Coal tar is a complex mixture that exhibits high carcinogenic potency in lungs of animals when administered in the diet. Studies have noted that lung tumor induction does not correlate with the benzo[a]pyrene content of coal tar, suggesting that other hydrocarbons may be involved in the observed tumorigenicity. Our previous studies have demonstrated that a major 'unknown' chemical-DNA adduct is formed in the lung of mice exposed to coal tar. We have used an in vitro rat microsomal activation system to generate the 'unknown' adduct with neat coal tar and fractions of coal tar obtained by chemical fractionation and HPLC. Chemical-DNA adduct formation was evaluated by (32)P-postlabeling using both multi-dimensional TLC and HPLC. GC-MS analysis of the coal tar fractions obtained from HPLC, which produced the 'unknown' adduct in vitro, demonstrated that the adducting hydrocarbon had a mass of 216. A careful evaluation of candidate hydrocarbons led to the conclusion that a benzofluorene derivative may be responsible for forming the 'unknown' chemical-DNA adduct. Comparative in vitro and in vivo studies on the adducting properties of all three isomers of benzofluorene indicated that 7H-benzo[c]fluorene is responsible for producing the 'unknown' adduct observed in the lung of mice ingesting coal tar. Animal feeding studies also demonstrated that 7H-benzo[c]fluorene formed considerably more lung DNA adducts than 11H-benzo[a]fluorene and 11H-benzo[b]fluorene. These data indicate that the four-ring polycyclic aromatic hydrocarbon 7H-benzo[c]fluorene, a hydrocarbon not previously shown to form DNA adducts in lung, is in fact a potent lung DNA adductor and is a candidate PAH for causing lung tumors in animals treated with coal tar. (+info)
A novel skin penetration enhancer: evaluation by membrane diffusion and confocal microscopy. (8/76)PURPOSE: The aim of this study was to determine the in vitro transdermal efficacy of a Meyer Zall Laboratories (MZL) oil/water emulsion in two separate preparations containing the actives, coal tar and the non-steroidal anti-inflammatory drug, diclofenac sodium. METHOD: The release rate of the two active ingredients from MZL dermatological preparations, Exorex and Athru-Derm and four comparator products was determined using an enhancer cell system, whilst specific penetration characteristics of the MZL formulation were elucidated using confocal and electron microscopy. The latter properties were explored at both the organ level, using human skin, as well as at a cellular level using a melanoma cell line. RESULTS: While the in vitro release rates for all formulations was high, coal tar and diclofenac release from Exorex and Athru-Derm respectively was, at nearly all time intervals, significantly higher than from comparator products. Microscopy revealed the presence of spherical liposomal type structures in both the MZL lotion and a comparator gel. In the MZL lotion, the majority of these structures, referred to here as emzaloid particles, were in the order of magnitude of about 50 nm to 1 microm in diameter with a small minority exceeding these dimensions. After application of Athru-Derm to human skin, intact emzaloid particles of submicron dimensions were detected in the epidermis in association with the cell membranes. The affinity of the MZL lotion for cell membranes was further demonstrated with melanoma cells; in addition, the formulation was seen to penetrate even to the nucleus of viable cells. CONCLUSION: Overall the data suggest that the oil/water base in MZL formulations is a highly efficient transdermal vehicle able to transport a wide range of indication- specific actives to their site of action. (+info)
Psoriasis can affect any part of the body, including the scalp, elbows, knees, and lower back. The symptoms of psoriasis can vary in severity, and the condition can have a significant impact on quality of life. In addition to physical discomfort, psoriasis can also cause emotional distress and stigma.
There is no cure for psoriasis, but there are several treatment options available, including topical creams and ointments, light therapy, and systemic medications such as biologic drugs. With proper treatment, many people with psoriasis are able to manage their symptoms and improve their quality of life.
Psoriasis is relatively common, affecting approximately 2-3% of the global population, with a higher prevalence in Caucasians than in other races. It can occur at any age, but typically starts in the late teenage years or early adulthood. Psoriasis is often associated with other health conditions, such as diabetes, heart disease, and depression.
Overall, psoriasis is a complex and multifactorial condition that requires a comprehensive approach to management, including both physical and emotional support. With appropriate treatment and self-care, people with psoriasis can lead full and active lives.
There are several forms of pneumoconiosis, including:
* Coal workers' pneumoconiosis (CWP): caused by inhalation of coal dust in coal miners.
* Silicosis: caused by inhalation of silica dust in workers such as quarry workers, miners, and others who work with silica-containing materials.
* Asbestosis: caused by inhalation of asbestos fibers, which can lead to inflammation and scarring of the lungs.
* Hypersensitivity pneumonitis: caused by exposure to specific organic dusts, such as those found in agricultural or woodworking settings.
The symptoms of pneumoconiosis can vary depending on the type and severity of the disease, but may include coughing, shortness of breath, fatigue, and fever. In severe cases, pneumoconiosis can lead to respiratory failure and other complications.
Diagnosis of pneumoconiosis typically involves a combination of physical examination, medical history, and diagnostic tests such as chest X-rays, CT scans, and lung function tests. Treatment for pneumoconiosis may include medications to manage symptoms, pulmonary rehabilitation, and measures to reduce exposure to the offending particles. In severe cases, lung transplantation may be necessary.
Prevention of pneumoconiosis is critical, and this involves implementing appropriate safety measures in workplaces where workers are exposed to dusts or other particles. This can include using respiratory protection equipment, improving ventilation, and reducing exposure to hazardous materials. Early detection and treatment of pneumoconiosis can help to slow the progression of the disease and improve outcomes for affected individuals.
There are several types of eczema, including:
1. Atopic dermatitis: This is the most common type of eczema, and it is often associated with allergies such as hay fever or asthma.
2. Contact dermatitis: This type of eczema is caused by exposure to an allergen or irritant, such as a chemical or detergent.
3. Seborrheic dermatitis: This type of eczema is characterized by redness and flaking on the scalp, face, or body.
4. Neurodermatitis: This type of eczema is caused by chronic itching and scratching, which leads to thickening and darkening of the skin.
5. Pompholyx: This is a type of eczema that occurs on the hands and feet.
The exact cause of eczema is not known, but it is thought to be related to an overactive immune system, allergies, and environmental triggers such as stress, cold weather, and certain foods. Treatment for eczema typically involves a combination of topical medications, oral medications, and lifestyle changes, such as avoiding triggers and moisturizing the skin.
Complications of eczema can include:
1. Infections: Eczema can increase the risk of bacterial, viral, and fungal infections, such as impetigo or herpes simplex.
2. Scratching and skin thickening: Chronic itching and scratching can lead to thickening and darkening of the skin, which can be unsightly and painful.
3. Emotional distress: Living with eczema can cause significant emotional distress, including anxiety and depression.
4. Sleep disturbances: Eczema can disrupt sleep patterns and cause fatigue, which can impact daily life and overall well-being.
5. Stigma and social isolation: People with eczema may experience stigma and social isolation due to the visible nature of the condition.
It is important for people with eczema to work closely with their healthcare provider to manage the condition and prevent complications. With appropriate treatment and self-care, many people with eczema are able to manage their symptoms and lead active, fulfilling lives.
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- Coal tar creosote can build up in plants and animals. (cdc.gov)
- coal, or from the resin of the creosote bush. (cdc.gov)
- Coal tar creosote is a thick, problems such as eczema or psoriasis. (cdc.gov)
- Eating herbal remedies containing the leaves from the tar pitch are usually thick, black, or dark-brown liquids or creosote bush, which are sold as dietary supplements. (cdc.gov)
- Coal tar products are used in medicines to ` Living in treated-wood houses that may result in air or treat skin diseases such as psoriasis, and also as animal and skin contact with creosote. (cdc.gov)
- Coal tar creosote is the most widely used wood preservative in the United States. (cdc.gov)
- Coal tar creosote is released to water and soil mainly as a result of its use in the wood preservation industry. (cdc.gov)
- Some components of coal tar creosote dissolve in water confusion, kidney or liver problems, unconsciousness, and and may move through the soil to groundwater. (cdc.gov)
- Instruct children not to come in contact with creosote- direct contact with the skin during wood treatment or treated wood when playing on or near railroad tracks, in manufacture of coal tar creosote-treated products, has ditches close to utility poles, in old barns or other farm resulted in skin cancer and cancer of the scrotum. (cdc.gov)
- Details for: Coal tar creosote. (who.int)
- Creosote is the name used for a variety of products: wood creosote, coal tar creosote, coal tar, coal tar pitch, and coal tar pitch volatiles. (cdc.gov)
- These products are mixtures of many chemicals created by burning of beech and other woods, coal, or from the resin of the creosote bush. (cdc.gov)
- Coal tar creosote is a thick, oily liquid typically amber to black in color. (cdc.gov)
- Components of creosote that do not dissolve in water will remain in place in a tar-like mass. (cdc.gov)
- Brief direct contact with large amounts of coal tar creosote may result in a rash or severe irritation of the skin, chemical burns of the surfaces of the eyes, convulsions and mental confusion, kidney or liver problems, unconsciousness, and even death. (cdc.gov)
- Long-term exposure to low levels of creosote, especially direct contact with the skin during wood treatment or manufacture of coal tar creosote-treated products, has resulted in skin cancer and cancer of the scrotum. (cdc.gov)
- The International Agency for Research on Cancer (IARC) has determined that coal tar is carcinogenic to humans and that creosote is probably carcinogenic to humans. (cdc.gov)
- Worker exposure to dibenzofuran may occur through inhalation and dermal contact at sites where coal tar, coal tar derivatives, or creosote are handled. (nih.gov)
- Coal tar creosote is a complex mixture typically composed of 85% PAHs and 2-17% phenolics. (nih.gov)
- Coal tar and coal-tar pitch, both used in sealcoat products, have extremely high concentrations of PAHs, and both are classified as known human carcinogens. (usgs.gov)
- Coal-tar-based pavement sealcoat typically contains 35,000 to 200,000 mg/kg (parts per million, or ppm) PAHs, about 100 times more PAHs than in used motor oil and about 1,000 times more PAHs than in sealcoat products with an asphalt (oil) base. (usgs.gov)
- There are many sources of PAHs to the environment, representing a wide range of PAHs concentrations, including asphalt (2-9 milligrams per kilogram, or mg/kg), tire particles (84 mg/kg), used motor oil (730 mg/kg), and coal-tar-based sealcoat (34,000-202,000 mg/kg). (usgs.gov)
- Concentrations of PAHs in runoff, sediment, soils, and dust near coal-tar-sealcoated pavement are substantially higher than concentrations in those media near concrete pavement, unsealed asphalt pavement, and asphalt pavement with asphalt-based sealcoat. (usgs.gov)
- Cytochrome P450 1b1 in polycyclic aromatic hydrocarbon (PAH)-induced skin carcinogenesis: Tumorigenicity of individual PAHs and coal-tar extract, DNA adduction and expression of select genes in the Cyp1b1 knockout mouse. (oregonstate.edu)
- Coal tar sealant products contain polycyclic aromatic hydrocarbons (PAHs), which are a group of organic chemicals formed during the incomplete burning of coal, oil, gas, or other organic substances. (cityofroseville.com)
- This study is a collaboration between NIH and CDC that is measuring exposure of coal tar sealant applicators to polycyclic aromatic hydrocarbons (PAHs) compounds. (nih.gov)
- Coal tar is a byproduct of the coking of coal, and coal-tar pitch is the residue that remains after the distillation of coal tar. (usgs.gov)
- Coal-tar pitch is the residue that remains after the distillation of coal tar, that is, the thick black liquid remaining after various oils are removed from coal tar for use in the manufacture of industrial and consumer products. (usgs.gov)
- CTP is a residue formed from the distillation of coal tar and is widely used as a carbonisable/graphitisable binder for many industrial applications. (royce.ac.uk)
- The residue from the distillation of high temperature coal tar. (europa.eu)
- A by-product of the destructive distillation of coal used as a topical antieczematic. (nih.gov)
- On October 17, 2019, the Austin City Council passed an amendment to the coal tar ban ordinance changing the definition from coal tar containing products to high PAH (polycyclic aromatic hydrocarbons) pavement products. (austintexas.gov)
- In 2003, City of Austin scientists identified coal tar-based pavement sealants as a significant source of polycyclic aromatic hydrocarbon (PAH) contamination in Austin area stream sediments. (austintexas.gov)
- Coal-tar-based pavement sealcoat is a potent source of polycyclic aromatic hydrocarbon (PAH) contamination in urban and suburban areas and a potential concern for human health and aquatic life. (usgs.gov)
- Unfortunately, coal tar contains a significant amount of polycyclic aromatic hydrocarbons, which can potentially be hazardous to the environment. (paversanddecks.com)
- Some cities have banned the use of coal tar for sealing driveways due to the hazards that polycyclic aromatic hydrocarbons can pose to aquatic wildlife in the local waterways. (paversanddecks.com)
- Coal Tar Epoxy is a high-solids, two-component tar filled coating formulated to provide excellent film build in one or two coats. (aucuttspaint.com)
- In this work, the effect of erosion on corrosion behavior of coal tar epoxy coating was evaluated using electrochemical impedance spectroscopy (EIS) measurements. (issiran.com)
- The Effect of Erosion on Corrosion Protection Properties of Coal Tar Epoxy Coating', International Journal of Iron & Steel Society of Iran , 11(2), pp. 17-22. (issiran.com)
- Having been in the market for long have made us one of the reputed service provider of Coal Tar Epoxy Coating Services. (chauhancreation.in)
- Coal-tar-based sealcoated pavement: a major PAH source to ur. (pubpeer.com)
- FVB/N mice wild-type, heterozygous or null for Cyp 1b1 were used in a two-stage skin tumor study comparing PAH, benzo[a]pyrene (BaP), dibenzo[def,p]chrysene (DBC), and coal tar extract (CTE, SRM 1597a). (oregonstate.edu)
- Coal tar phototherapy for psoriasis reevaluated: erythemogenic versus suberythemogenic ultraviolet with a tar extract in oil and crude coal tar. (nih.gov)
- The use of coal tar sealers on asphalt driveways is a common practice. (cityofroseville.com)
- Occupational exposure to soots, tars, and certain mineral oils is known to be carcinogenic according to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985) (Merck Index, 11th ed). (nih.gov)
- Coal tar products are used in medicines to treat skin diseases such as psoriasis, and also as animal and bird repellents, insecticides, animal dips, and fungicides. (cdc.gov)
- Most sealcoat products are either coal-tar or asphalt emulsion. (usgs.gov)
- Coal-tar-based sealcoat products typically are 20 to 35 percent coal tar or coal-tar pitch. (usgs.gov)
- Coal tar and coal-tar pitch are used in coal-tar-based sealcoat products, although use of coal-tar pitch is more common than use of coal tar. (usgs.gov)
- Some healthcare professionals recommend using products that contain tar extract to help ease eczema symptoms . (medicalnewstoday.com)
- Animal studies have also shown skin cancer from skin exposure to coal tar products. (cdc.gov)
- Ketchup was a soup of "waste products from canners, like coal-tar colors or starch paste. (cdc.gov)
- Coal tar sealers are prohibited (refer to section below). (cityofroseville.com)
- Coal tar needs to be applied by professionals due to the fact that you need to heat it up in order to apply it, and professionals have access to higher-quality asphalt emulsion sealers with a lower water content that does a better job of protecting your driveway compared to what you can purchase at a home improvement store. (paversanddecks.com)
- In addition to protecting your driveway from oil, coal tar also shields the asphalt from ultraviolet light and open-air, preventing it from oxidizing and weakening. (paversanddecks.com)
- Like coal tar, an asphalt emulsion sealer will protect your driveway against air and ultraviolet light, which helps stop your asphalt driveway from oxidizing. (paversanddecks.com)
- Because of the potential toxicity of coal tar to the breastfed infant, alternate drugs are preferred. (nih.gov)
- Samples of tar and coal - fire minerals collected from the mouth of vents provided insight into the behavior and formation of the coal fires . (bvsalud.org)
- Since that time the United States Geological Survey (USGS) and the City have conducted additional research that corroborates this finding, concluding that coal tar sealants contribute the majority of stream PAH loading in the Austin area. (austintexas.gov)
- The coal tar can chip off when you drive over it, allowing the coal tar dust to make its way into nearby lakes and streams when it's carried away by rainwater. (paversanddecks.com)
- Thankfully, this isn't as much of a concern when using coal tar on residential driveways, since residential driveways see less vehicle traffic compared to roads or parking lots - less traffic means that less coal tar dust will be generated. (paversanddecks.com)
- Coal tar also produces naphthalene balls used to resist insects and other insects. (askiitians.com)
- A woman was treated with topical coal tar-containing medications for the treatment of atopic dermatitis. (nih.gov)
- As a combustion product, dibenzofuran may be released from the incomplete combustion of coal biomass, refuse, diesel fuel and residual oil, as well as from tobacco smoke (NLM, 2000a). (nih.gov)
- In order to apply it, a sealcoating service heats it up in a cauldron in order to liquefy it, then sprays it onto your driveway in order to create a thick layer of coal tar on top of the asphalt. (paversanddecks.com)
- Coal tar and coal tar pitch are usually thick, black, or dark-brown liquids or semi-solids, with a smoky odor. (cdc.gov)
- A bitumen petroleum product is used in place of coal tar to metallize the roads these days. (askiitians.com)
- For historical and economic reasons, coal-tar-based sealcoat is more common east of the Continental Divide (except in those states, counties, and municipalities where its use is prohibited), and asphalt-based sealcoat is more west of the Continental Divide. (usgs.gov)
- In collaboration with Morgan advanced materials, this ICP-Royce funded project, awarded £116,025 has allowed for the exploration of the use of wood tar biopitch (WTB) as a sustainable replacement for coal tar pitch (CTP), a 'sunset' material under REACH guidelines. (royce.ac.uk)
- The main advantage of coal tar is that it prevents motor oil from damaging your asphalt driveway. (paversanddecks.com)
- Learn more about coal-tar-based sealcoat here. (usgs.gov)
- When sealcoating your driveway, you'll be able to choose between a coal tar sealer and an asphalt emulsion sealer. (paversanddecks.com)
- The mother breastfed her infant (extent not stated) and the infant's urine was collected before the start of treatment and 4 times during maternal therapy with coal tar. (nih.gov)
- The first three groups all use coal tar pitch (CTP) as a key material. (royce.ac.uk)
- The importance of this material for Morgan activities is reflected, for example, by an expansion in Morgan's factory in Swansea, which has just completed an investment in a new production line to extrude coal tar pitch-graphite particulate materials. (royce.ac.uk)
- During this project, we produced Wood Tar Biopitch (WTB) from distilling sawdust, mixed it with graphite particles and then carbonising and graphitizing them to produce carbon-carbon composites. (royce.ac.uk)