Devices, not affixed to the body, designed to help persons having musculoskeletal or neuromuscular disabilities to perform activities involving movement.
Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports basic and applied research for a national program in diabetes, endocrinology, and metabolic diseases; digestive diseases and nutrition; and kidney, urologic, and hematologic diseases. It was established in 1948.
Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical synthesis, as insect repellents, fungicides, lubricants, preservatives, and, formerly, as topical antiseptics.
Computer processing of a language with rules that reflect and describe current usage rather than prescribed usage.
Systematic organization, storage, retrieval, and dissemination of specialized information, especially of a scientific or technical nature (From ALA Glossary of Library and Information Science, 1983). It often involves authenticating or validating information.
Organized activities related to the storage, location, search, and retrieval of information.
Software designed to store, manipulate, manage, and control data for specific uses.
Areas of the earth where hydrocarbon deposits of PETROLEUM and/or NATURAL GAS are located.
A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Toxic, volatile, flammable liquid hydrocarbon byproduct of coal distillation. It is used as an industrial solvent in paints, varnishes, lacquer thinners, gasoline, etc. Benzene causes central nervous system damage acutely and bone marrow damage chronically and is carcinogenic. It was formerly used as parasiticide.
An agency in the Executive Branch of the Federal Government. It was created as an independent regulatory agency responsible for the implementation of federal laws designed to protect the environment. Its mission is to protect human health and the ENVIRONMENT.
Contamination of bodies of water (such as LAKES; RIVERS; SEAS; and GROUNDWATER.)
Naphthalene derivatives carrying one or more hydroxyl (-OH) groups at any ring position. They are often used in dyes and pigments, as antioxidants for rubber, fats, and oils, as insecticides, in pharmaceuticals, and in numerous other applications.
A bibliographic database that includes MEDLINE as its primary subset. It is produced by the National Center for Biotechnology Information (NCBI), part of the NATIONAL LIBRARY OF MEDICINE. PubMed, which is searchable through NLM's Web site, also includes access to additional citations to selected life sciences journals not in MEDLINE, and links to other resources such as the full-text of articles at participating publishers' Web sites, NCBI's molecular biology databases, and PubMed Central.
A publication issued at stated, more or less regular, intervals.
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
The premier bibliographic database of the NATIONAL LIBRARY OF MEDICINE. MEDLINE® (MEDLARS Online) is the primary subset of PUBMED and can be searched on NLM's Web site in PubMed or the NLM Gateway. MEDLINE references are indexed with MEDICAL SUBJECT HEADINGS (MeSH).
A class of organic compounds which contain an anilino (phenylamino) group linked to a salt or ester of naphthalenesulfonic acid. They are frequently used as fluorescent dyes and sulfhydryl reagents.
Activity involved in transfer of goods from producer to consumer or in the exchange of services.
Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.
Detailed account or statement or formal record of data resulting from empirical inquiry.
A reagent that is used to neutralize peptide terminal amino groups.
A class of organic compounds that contains a naphthalene moiety linked to a sulfonic acid salt or ester.

Activation of stress-activated protein kinase/c-Jun NH2-terminal kinase and p38 kinase in calphostin C-induced apoptosis requires caspase-3-like proteases but is dispensable for cell death. (1/2851)

Apoptosis was induced in human glioma cell lines by exposure to 100 nM calphostin C, a specific inhibitor of protein kinase C. Calphostin C-induced apoptosis was associated with synchronous down-regulation of Bcl-2 and Bcl-xL as well as activation of caspase-3 but not caspase-1. The exposure to calphostin C led to activation of stress-activated protein kinase/c-Jun NH2-terminal kinase (SAPK/JNK) and p38 kinase and concurrent inhibition of extracellular signal-regulated kinase (ERK). Upstream of ERK, Shc was shown to be activated, but its downstream Raf1 and ERK were inhibited. The pretreatment with acetyl-Tyr-Val-Ala-Asp-aldehyde, a relatively selective inhibitor of caspase-3, or benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone (z-VAD.fmk), a broad spectrum caspase inhibitor, similarly inhibited calphostin C-induced activation of SAPK/JNK and p38 kinase as well as apoptotic nuclear damages (chromatin condensation and DNA fragmentation) and cell shrinkage, suggesting that caspase-3 functions upstream of SAPK/JNK and p38 kinase, but did not block calphostin C-induced surface blebbing and cell death. On the other hand, the inhibition of SAPK/JNK by transfection of dominant negative SAPK/JNK and that of p38 kinase by SB203580 induced similar effects on the calphostin C-induced apoptotic phenotypes and cell death as did z-VAD.fmk and acetyl-Tyr-Val-Ala-Asp-aldehyde, but the calphostin C-induced PARP cleavage was not changed, suggesting that SAPK/JNK and p38 kinase are involved in the DNA fragmentation pathway downstream of caspase-3. The present findings suggest, therefore, that the activation of SAPK/JNK and p38 kinase is dispensable for calphostin C-mediated and z-VAD.fmk-resistant cell death.  (+info)

Development of muscarinic analgesics derived from epibatidine: role of the M4 receptor subtype. (2/2851)

Epibatidine, a neurotoxin isolated from the skin of Epipedobates tricolor, is an efficacious antinociceptive agent with a potency 200 times that of morphine. The toxicity of epibatidine, because of its nonspecificity for both peripheral and central nicotinic receptors, precludes its development as an analgesic. During the synthesis of epibatidine analogs we developed potent antinociceptive agents, typified by CMI-936 and CMI-1145, whose antinociception, unlike that of epibatidine, is mediated via muscarinic receptors. Subsequently, we used specific muscarinic toxins and antagonists to delineate the muscarinic receptor subtype involved in the antinociception evoked by these agents. Thus, the antinociception produced by CMI-936 and CMI-1145 is inhibited substantially by 1) intrathecal injection of the specific muscarinic M4 toxin, muscarinic toxin-3; 2) intrathecally administered pertussis toxin, which inhibits the G proteins coupled to M2 and M4 receptors; and 3) s.c. injection of the M2/M4 muscarinic antagonist himbacine. These results demonstrate that the antinociception elicited by these epibatidine analogs is mediated via muscarinic M4 receptors located in the spinal cord. Compounds that specifically target the M4 receptor therefore may be of substantial value as alternative analgesics to the opiates.  (+info)

Cannabinoid suppression of noxious heat-evoked activity in wide dynamic range neurons in the lumbar dorsal horn of the rat. (3/2851)

The effects of cannabinoid agonists on noxious heat-evoked firing of 62 spinal wide dynamic range (WDR) neurons were examined in urethan-anesthetized rats (1 cell/animal). Noxious thermal stimulation was applied with a Peltier device to the receptive fields in the ipsilateral hindpaw of isolated WDR neurons. To assess the site of action, cannabinoids were administered systemically in intact and spinally transected rats and intraventricularly. Both the aminoalkylindole cannabinoid WIN55,212-2 (125 microg/kg iv) and the bicyclic cannabinoid CP55,940 (125 microg/kg iv) suppressed noxious heat-evoked activity. Responses evoked by mild pressure in nonnociceptive neurons were not altered by CP55,940 (125 microg/kg iv), consistent with previous observations with another cannabinoid agonist, WIN55,212-2. The cannabinoid induced-suppression of noxious heat-evoked activity was blocked by pretreatment with SR141716A (1 mg/kg iv), a competitive antagonist for central cannabinoid CB1 receptors. By contrast, intravenous administration of either vehicle or the receptor-inactive enantiomer WIN55,212-3 (125 microg/kg) failed to alter noxious heat-evoked activity. The suppression of noxious heat-evoked activity induced by WIN55,212-2 in the lumbar dorsal horn of intact animals was markedly attenuated in spinal rats. Moreover, intraventricular administration of WIN55,212-2 suppressed noxious heat-evoked activity in spinal WDR neurons. By contrast, both vehicle and enantiomer were inactive. These findings suggest that cannabinoids selectively modulate the activity of nociceptive neurons in the spinal dorsal horn by actions at CB1 receptors. This modulation represents a suppression of pain neurotransmission because the inhibitory effects are selective for pain-sensitive neurons and are observed with different modalities of noxious stimulation. The data also provide converging lines of evidence for a role for descending antinociceptive mechanisms in cannabinoid modulation of spinal nociceptive processing.  (+info)

Comparison of local anesthetic activities between optical isomers of cis-1-benzoyloxy-2-dimethylamino-1,2,3,4-tetrahydronaphthalene. (4/2851)

The optical isomers of cis-1-benzoyloxy-2-dimethylamino-1,2,3,4-tetrahydronaphthalene (YAU-17) were compared for their local anesthetic activity, acute toxicity, spasmolytic activity, and partition coefficient between chloroform and phosphate buffer. 1-YAU-17 was more active than d-YAU-17 in blocking the conduction of action potentials in isolated frog sciatic nerves. The difference in local anesthetic activities between the optical isomers was further substantiated by in vivo tests for corneal anesthesia, intracutaneous anesthesia and sciatic nerve block in quinea-pigs. Similarly, the i.v. injection to mice revealed a higher toxicity for 1-YAU-17 as compared to its d-isomer. In these tests, the potency ratios of the enantiomers ranged from 2 to 4, and the racemate had an intermediate potency. On the contrary, no difference among the compounds was found in their liposolubility, partition coefficient, and spasmolytic activity examined with isolated guinea-pig ileum. These results indicate that the steric factors play an important role in the production of different local anesthetic activities between the optical isomers of YAU-17, and their local anesthetic potency tends to be correlated to their intravenous acute toxicity but not to their spasmolytic activity.  (+info)

Contrasting effects of a nonionic surfactant on the biotransformation of polycyclic aromatic hydrocarbons to cis-dihydrodiols by soil bacteria. (5/2851)

The biotransformation of the polycyclic aromatic hydrocarbons (PAHs) naphthalene and phenanthrene was investigated by using two dioxygenase-expressing bacteria, Pseudomonas sp. strain 9816/11 and Sphingomonas yanoikuyae B8/36, under conditions which facilitate mass-transfer limited substrate oxidation. Both of these strains are mutants that accumulate cis-dihydrodiol metabolites under the reaction conditions used. The effects of the nonpolar solvent 2,2,4, 4,6,8,8-heptamethylnonane (HMN) and the nonionic surfactant Triton X-100 on the rate of accumulation of these metabolites were determined. HMN increased the rate of accumulation of metabolites for both microorganisms, with both substrates. The enhancement effect was most noticeable with phenanthrene, which has a lower aqueous solubility than naphthalene. Triton X-100 increased the rate of oxidation of the PAHs with strain 9816/11 with the effect being most noticeable when phenanthrene was used as a substrate. However, the surfactant inhibited the biotransformation of both naphthalene and phenanthrene with strain B8/36 under the same conditions. The observation that a nonionic surfactant could have such contrasting effects on PAH oxidation by different bacteria, which are known to be important for the degradation of these compounds in the environment, may explain why previous research on the application of the surfactants to PAH bioremediation has yielded inconclusive results. The surfactant inhibited growth of the wild-type strain S. yanoikuyae B1 on aromatic compounds but did not inhibit B8/36 dioxygenase enzyme activity in vitro.  (+info)

Role of iNOS in the vasodilator responses induced by L-arginine in the middle cerebral artery from normotensive and hypertensive rats. (6/2851)

1. The substrate of nitric oxide synthase (NOS), L-arginine (L-Arg, 0.01 microM - 1 mM), induced endothelium-independent relaxations in segments of middle cerebral arteries (MCAs) from normotensive Wistar-Kyoto (WKY) and hypertensive rats (SHR) precontracted with prostaglandin F2alpha (PGF2alpha). These relaxations were higher in SHR than WKY arteries. 2. L-N(G)-nitroarginine methyl ester (L-NAME) and 2-amine-5,6-dihydro-6-methyl-4H-1,3-tiazine (AMT), unspecific and inducible NOS (iNOS) inhibitors, respectively, reduced those relaxations, specially in SHR. 3. Four- and seven-hours incubation with dexamethasone reduced the relaxations in MCAs from WKY and SHR, respectively. 4. Polymyxin B and calphostin C, protein kinase C (PKC) inhibitors, reduced the L-Arg-induced relaxation. 5. Lipopolysaccharide (LPS, 7 h incubation) unaltered and inhibited these relaxations in WKY and SHR segments, respectively. LPS antagonized the effect polymyxin B in WKY and potentiated L-Arg-induced relaxations in SHR in the presence of polymyxin B. 6. The contraction induced by PGF2alpha was greater in SHR than WKY arteries. This contraction was potentiated by dexamethasone and polymyxin B although the effect of polymyxin B was higher in SHR segments. LPS reduced that contraction and antagonized dexamethasone- and polymyxin B-induced potentiation, these effects being greater in arteries from SHR. 7. These results suggest that in MCAs: (1) the induction of iNOS participates in the L-Arg relaxation and modulates the contraction to PGF2alpha; (2) that induction is partially mediated by a PKC-dependent mechanism; and (3) the involvement of iNOS in such responses is greater in the hypertensive strain.  (+info)

Protein kinase C-activated oxidant generation in endothelial cells signals intercellular adhesion molecule-1 gene transcription. (7/2851)

We tested the hypothesis that activation of protein kinase C (PKC) and generation of oxidants are critical sequential signals mediating tumor necrosis factor (TNF)-alpha-induced activation of nuclear factor-kappaB (NF-kappaB) and transcription of the intercellular adhesion molecule (ICAM)-1 gene. Stimulation of human pulmonary artery endothelial (HPAE) cells with TNF-alpha (100 U/ml) induced the activation of PKC and, subsequently, generation of oxidants. Pretreatment with calphostin C, a specific PKC inhibitor, prevented oxidant generation after TNF-alpha stimulation, indicating that PKC activation mediated the production of oxidants in HPAE cells. In contrast, pretreatment of HPAE cells with N-acetylcysteine, an antioxidant and a precursor of glutathione, failed to prevent PKC activation, indicating that PKC activation was not secondary to the oxidant production. These findings suggest that oxidant generation in endothelial cells occurs downstream of PKC activation. However, both PKC activation and oxidant generation were necessary for ICAM-1 mRNA expression because the pretreatment of HPAE cells with either calphostin C or N-acetylcysteine inhibited the TNF-alpha-induced activation of NF-kappaB and prevented the activation of ICAM-1 promoter. Prolonged exposure of HPAE cells to the phorbol ester, phorbol-12-myristate-13-acetate, which is known to deplete all except atypical PKC isozymes, failed to prevent TNF-alpha-induced ICAM-1 mRNA expression. We conclude that TNF-alpha-induced oxidant generation secondary to the activation of a phorbol ester-insensitive PKC isozyme signals the activation NF-kappaB and ICAM-1 gene transcription.  (+info)

Role of a conserved lysine residue in the peripheral cannabinoid receptor (CB2): evidence for subtype specificity. (8/2851)

The human cannabinoid receptors, central cannabinoid receptor (CB1) and peripheral cannabinoid receptor (CB2), share only 44% amino acid identity overall, yet most ligands do not discriminate between receptor subtypes. Site-directed mutagenesis was employed as a means of mapping the ligand recognition site for the human CB2 cannabinoid receptor. A lysine residue in the third transmembrane domain of the CB2 receptor (K109), which is conserved between the CB1 and CB2 receptors, was mutated to alanine or arginine to determine the role of this charged amino acid in receptor function. The analogous mutation in the CB1 receptor (K192A) was found to be crucial for recognition of several cannabinoid compounds excluding (R)-(+)-[2, 3-dihydro-5-methyl-3-[(4-morpholinyl)methyl]pyrrolo[1,2,3-de]-1, 4-benzoxazin-6-yl](1-naphthalenyl)methanone (WIN 55,212-2). In contrast, in human embryonic kidney (HEK)-293 cells expressing the mutant or wild-type CB2 receptors, we found no significant differences in either the binding profile of several cannabinoid ligands nor in inhibition of cAMP accumulation. We identified a high-affinity site for (-)-3-[2-hydroxyl-4-(1, 1-dimethylheptyl)phenyl]-4-[3-hydroxyl propyl] cyclohexan-1-ol (CP-55,940) in the region of helices 3, 6, and 7, with S3.31(112), T3.35(116), and N7.49(295) in the K109A mutant using molecular modeling. The serine residue, unique to the CB2 receptor, was then mutated to glycine in the K109A mutant. This double mutant, K109AS112G, retains the ability to bind aminoalkylindoles but loses affinity for classical cannabinoids, as predicted by the molecular model. Distinct cellular localization of the mutant receptors observed with immunofluorescence also suggests differences in receptor function. In summary, we identified amino acid residues in the CB2 receptor that could lead to subtype specificity.  (+info)

Naphthalene produces species and cell selective injury to respiratory tract epithelial cells of rodents. In these studies we determined the apparent K{sub m}, V{sub max}, and catalytic efficiency (V{sub max}/K{sub m}) for naphthalene metabolism in microsomal preparations from subcompartments of the respiratory tract of rodents and non-human primates. In tissues with high substrate turnover, major metabolites were derived directly from naphthalene oxide with smaller amounts from conjugates of diol epoxide, diepoxide, and 1,2- and 1,4-naphthoquinones. In some tissues, different enzymes with dissimilar K{sub m} and V{sub max} appeared to metabolize naphthalene. The rank order of V{sub max} (rat olfactory epithelium , mouse olfactory epithelium , murine airways ≫ rat airways) correlated well with tissue susceptibility to naphthalene. The V{sub max} in monkey alveolar subcompartment was 2% that in rat nasal olfactory epithelium. Rates of metabolism in nasal compartments of the monkey were low. The ...
Parenteral administration of naphthalene produces a dose-dependent and tissue-, species-, and cell-selective lesion of murine Clara cells. The rate and stereoselectivity of naphthalene metabolism by microsomal preparations correlate with tissue and species differences in cytotoxicity. Because earlier studies used microsomes obtained from whole tissue, differences in susceptibility of proximal and distal airways could not be related to differences in the metabolic activation or detoxication of naphthalene. Specific subcompartments of the respiratory system, obtained by microdissection, have been used to study the cytochrome P450-dependent metabolism of naphthalene and the epoxide hydrolase/glutathione transferase-dependent metabolism of naphthalene oxide. The rates of naphthalene metabolism were substantially higher in mouse airways than in comparable airways of hamsters or rats. Rates of metabolism were higher in distal airways than in the trachea of all species studied. Metabolism in mouse ...
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Naphthalene is a type of polycyclic aromatic hydrocarbon (PAH) and possible carcinogen. It is found abundantly in outdoor air with traffic being the largest source. Elevated levels of naphthalene are also found in indoor air when mothballs or kitchen stoves burning biomass fuels are used.. Naphthalene is derived from petroleum and biofuel products and is found entirely in a gaseous phase rather than as a particulate. Human exposure to naphthalene is primarily through inhalation, although it can be ingested and absorbed through the skin. Due to the volatile nature of naphthalene, a box of mothballs can elevate indoor naphthalene levels to levels compatible with mid to upper level occupational exposure, with higher concentrations in smaller apartments or enclosed areas.. A cause of concern is that some Caribbean immigrant families in New York City frequently use mothballs as air fresheners. Therefore understanding potential downstream effects of naphthalene exposure has become increasingly ...
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TY - JOUR. T1 - Vapor-Liquid Equilibria in the System of Toluene/Aniline, Aniline/Naphthalene, and Naphthalene/Quinoline. AU - Lee, Chang-Ha. AU - Chen, Quen. AU - Mohamed, Rahoma S.. AU - Holder, Gerald D.. PY - 1992/4/1. Y1 - 1992/4/1. N2 - Vapor-liquid equilibria for the aniline/naphthalene, toluene/aniline, and naphthalene/quinoline systems have been determined at 0-1500 kPa and 490-623 K by using a static equilibrium cell. The data can be accurately correlated with the modified Peng-Roblnson equation of state by using density-dependent mixing rules. The binary interaction parameters and correction factors for the equation of state are reported at each isotherm. The presence of coal-derived solids in these binary systems did not influence any of the binary bubble pressures.. AB - Vapor-liquid equilibria for the aniline/naphthalene, toluene/aniline, and naphthalene/quinoline systems have been determined at 0-1500 kPa and 490-623 K by using a static equilibrium cell. The data can be accurately ...
ne),[[Vial (Naphthalene),Vial (Naphthalene)]]]] [[Vial (Naphthalene),Vial (Naphthalene)]] ...ory/Slot,index=4,title=Vial (Naphthalene),image=Vessel_vial.png,link=Vial (Naphthalene),amount=6}}{{Inventory/Slot,index=5,title=Vial (Benzene-Toluene-Xylene),ima ...
Exposure to naphthalene, 1-methylnaphthalene, or 2-methylnaphthalene happens mostly from breathing air contaminated from the burning of wood, tobacco, or fossil fuels, industrial discharges, or moth repellents. Exposure to large amounts of naphthalene may damage or destroy some of your red blood cells. Naphthalene has caused cancer in animals. Naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene have been found in at least 647, 37, and 410, respectively, of the 1,636 National Priority List sites identified by the Environmental Protection Agency (EPA).
Naphthalene is a commonly-occurring, volatile, polycyclic aromatic hydrocarbon, entering the environment from combustion processes, industrial uses, and consumer products (mothballs, cigarette smoke, etc.). Non-cancer air guidance Health-Based Values (HBV) were derived for naphthalene by MDH in 2004 for the acute (200 µg/m3) and chronic (9 µg/m3) durations. However, a cancer HBV has not been established. Possible carcinogenic concerns from inhalation of naphthalene have been an ongoing debate within the scientific community for nearly two decades (U. S. Environmental Protection Agency (EPA), 1998). The applicability of rodent respiratory (nasal/lung) tumors for deriving quantitative human health risk values is the critical outstanding issue.. The EPAs Integrated Risk Information System (IRIS) program evaluated naphthalene in 1998, 2004 (never completed), and is currently in the Draft Development stage for another update initiated in 2014. No estimate of naphthalene cancer potency, ...
3) United States Edition of Industrial Naphthalene Market Report 2020. Global Coronavirus pandemic has impacted all industries across the globe, Industrial Naphthalene market being no exception. As the Global economy heads towards major recession post-2009 crisis, Cognitive Market Research has published a recent study which meticulously studies the impact of this crisis on Global Industrial Naphthalene market and suggests possible measures to curtail them. This press release is a snapshot of the research study and further information can be gathered by accessing a complete report.To Contact Research experts Mail us @ [email protected] or call us on +1-312-376-8303.. Download Report Preview from here: https://www.cognitivemarketresearch.com/chemical-%26-materials/industrial-naphthalene-market-report#download_report The research team of Cognitive Market Research has formulated and compiled a new research report on Industrial Naphthalene market. The Industrial Naphthalene research report contains ...
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article{2003590, abstract = {During lung development, parabronchial SMC (PSMC) progenitors in the distal mesenchyme secrete fibroblast growth factor 10 (Fgf10), which acts on distal epithelial progenitors to promote their proliferation. beta-catenin signaling within PSMC progenitors is essential for their maintenance, proliferation, and expression of Fgf10. Here, we report that this Wnt/Fgf10 embryonic signaling cascade is reactivated in mature PSMCs after naphthalene-induced injury to airway epithelium. Furthermore, we found that this paracrine Fgf10 action was essential for activating surviving variant Clara cells (the cells in the airway epithelium from which replacement epithelial cells originate) located at the bronchoalveolar duct junctions and adjacent to neuroendocrine bodies. After naphthalene injury, PSMCs secreted Fgf10 to activate Notch signaling and induce Snail expression in surviving variant Clara cells, which subsequently underwent a transient epithelial to mesenchymal transition ...
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to 32.33 C .Find Erxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in separate experiment, is 5.211kJ/Celsius. .button {
Mothballs in households arent as widespread since they used to be, but when you have these small orbs of pesticides, try to be aware of the risks they current. The key ingredient in mothballs is naphthalene, which triggers a breakdown of pink blood cells in children that has hop over to these guys a genetic affliction referred to as G6PD deficiency, and pediatricians in Australian identified as for just a ban on naphthalene following it absolutely was associated with one particular babys death and brain hurt in two Other folks ...
Having examined the absorption spectra of naphthalene and its methyl derivatives, I have continued the investigation in order to see how the spectrum of naphthalene is affected by the introduction of different groups in the alpha and beta positions. The technique employed for the solution and vapour spectra has been fully described elsewhere. Pure hexane§ was used as a solvent unless otherwise stated, ϵ is the molecular absorption coefficient. The substances were purified by crystallisation from hexane. Liquids were fractionally distilled in vacuo. ...
ZrO2 nH2O (hydrogel) impregnated with transition metals (Cu, Co, and Ni) was studied in this work as a precursor for the synthesis of CuO/ZrO2 (CuZ), CoOx/ZrO2 (CoZ), and NiO/ZrO2 (NiZ) catalysts, employed in the naphthalene oxidation reaction. Fresh and catalytically used materials were characterized by different physicochemical techniques, to compare the bulk and surface behavior, with particular attention to the effect of the supported metal species properties on the catalytic activity. Techniques such as X-ray diffraction (XRD), temperature programmed reduction (TPR), differential scanning calorimetry (DSC), Brunauer-Emmett-Teller (BET) surface area analyzer, diffuse reflectance spectroscopy (DRS UV-vis), and Raman spectroscopy, allow for establishing structural and textural aspects of the support, as well as the surface coordination and the accessibility of supported species. Results were in agreement with the CuZ > CoZ > NiZ sequence for the activity in naphthalene oxidation reaction.
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This with my own letter gave me a very happy Atlantic crossing. I arrived in time to see Bragg on the 23rd. He told me that Jenkinson was making two new cameras, one of which was assigned to me. It would have a single circle goniometer head! He suggested that I work on the phenyl aliphatic acids as a tie in between his work on naphthalene and anthracene, and the work Muller and Shearer were doing on long chain compounds. He then told me to go take a good long holiday, possibly to read the two volumes of Tutton, and follow them by Hilton so that I would be ready to read the new paper by Astbury and Yardley on space-groups when I came back in September. I did read Tutton, but Hilton and the paper took the best part of the next year.. When I returned in September I set out to build my own X-ray equipment. The tube was a gas tube designed by Shearer and was built in the shop. The pumps were of local design and I was told that when I had made one in soft glass, I would be given some of a very ...
Applying complex ARENA BiMix NS/PC additive in the course of preparation of concrete, it is possible to increase significantly durability and to improve other qualitative indexes of concrete mixes, including parameters of mobility, speed of curing and water tightness. Active mineral fillers and a complex of the innovation polymeric modifiers are a part of the additive executed on the basis of microcement in ARENA BiMix NS/PC concrete. This additive should be entered into concrete solutions, proceeding from regulation of 3-6% to the mass of cement. For determination of an optimum dosage of ARENA BiMix NS/PC additive at production of concrete of various structure it is recommended to execute a series of trial batches.. ARENA BiMix NS is compatible with additives to concrete on naphthalene sulfate base ...
Naphthalene, 1,1-diethoxy-1,2,3,4-tetrahydro- | C14H20O2 | CID 71387374 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
38171-97-0 - FFQXRZVINHANAL-QPJJXVBHSA-N - 1-Methyl-4-(1-methyl-2-butenyl)naphthalene - Similar structures search, synonyms, formulas, resource links, and other chemical information.
TY - GEN. T1 - Isolation and characterisation of naphthalene utilising microorganisms. AU - Singh - Nee Nigam, Poonam. PY - 1994/3/28. Y1 - 1994/3/28. M3 - Conference contribution. BT - Unknown Host Publication. PB - Ulster University. T2 - Biotechnology and Industry: Present and Future, University of Ulster, UK,. Y2 - 28 March 1994. ER - ...
2-(1-Acetoxyethenyl)naphthalene | C14H12O2 | CID 15505586 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
In 1890, chemists had to work hard to find out what the structures of their molecules were, given they had no access to the plethora of modern techniques we are used to in 2010. For example, how could they be sure what the structure of naphthalene was? Well, two such chemists, William Henry Armstrong (1847-1937) and his student William Palmer Wynne (1861-1950; I might note that despite working with toxic chemicals for years, both made it to the ripe old age of ~90!) set out on an epic 11-year journey to synthesize all possible mono, di, tri and tetra-substituted naphthalenes. Tabulating how many isomers they could make (we will call them AW here) would establish beyond doubt the basic connectivity of the naphthalene ring system. This was in fact very important, since many industrial dyes were based on this ring system, and patents depended on getting it correct! Amazingly, their collection of naphthalenes survives to this day. With the passage of 120 years, we can go back and check their ...
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The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
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... naphthalene > fulvene > cyclopentadiene > anthracene > butadiene Dienophile: N2 > CO2 > naphthalene > benzene, nitriles > ...
De-aromatization of the first ring of the naphthalene system occurs at the expense of 25 kcal/mol. In the next step a bisulfite ... "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a17_009. ...
The naphthols are naphthalene homologues of phenol, but more reactive. Both isomers are soluble in simple alcohols, ethers, and ... Traditionally, 2-naphthol is produced by a two-step process that begins with the sulfonation of naphthalene in sulfuric acid: ... It is an isomer of 1-naphthol, differing by the location of the hydroxyl group on the naphthalene ring. ... Safety data for 2-naphthol Gerald Booth (2005). "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. ...
Gerald Booth (2005). "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi: ...
p. 976-7. ISBN 0-205-05838-8. Gerald Booth (2005). "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. ...
ISBN 0-471-58589-0 • Gerald Booth "Naphthalene Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH ... "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH & Co. KGaA. doi:10.1002/ ...
... s Naphthalenesulfonates are derivatives of sulfonic acid which contain a naphthalene functional unit. A ... Collin, Gerd; Höke, Hartmut; Greim, Helmut (2003). "Naphthalene and Hydronaphthalenes". Ullmann's Encyclopedia of Industrial ... "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a17_009. ...
... is an aromatic amine derived from naphthalene. It can cause bladder cancer (transitional cell carcinoma). It ... 0441". National Institute for Occupational Safety and Health (NIOSH). Gerald Booth (2005). "Naphthalene Derivatives". Ullmann's ...
It is a precursor to naphthalene-1,5-diisocyanate, a precursor to specialty polyurethanes. C10H10N2 Bernes, S.; Pastrana, M.R ... Booth, Gerald (2005). "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH.. ...
It is a precursor to 1,8-bis(dimethylamino)naphthalene. C10H10N2 Booth, Gerald (2005). "Naphthalene Derivatives". Ullmann's ...
Gerald Booth (2005). "Naphthalene Derivatives". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi: ... 1,5-Dihydroxynaphthalene is prepared from naphthalene-1,5-disulfonic acid by hydrolysis with strong base followed by ...
The enthalpy of hydrogenation of naphthalene is relatively low, which allows the tetrahydronaphthalene to be regenerated in the ... The classic hydrogen-donor solvent (or just donor solvent) is tetrahydronaphthalene, which converts to naphthalene by transfer ... Collin, Gerd; Höke, Hartmut; Greim, Helmut (2003). "Naphthalene and Hydronaphthalenes". Ullmann's Encyclopedia of Industrial ...
It is a partially hydrogenated derivative of naphthalene. It is a colorless liquid that is used as a hydrogen-donor solvent. ... Tetralin is produced by the catalytic hydrogenation of naphthalene. Although nickel catalysts are traditionally employed, many ... Collin, Gerd; Höke, Hartmut; Greim, Helmut (2003). "Naphthalene and Hydronaphthalenes". Ullmann's Encyclopedia of Industrial ... "Production of tetralin by the hydrogenation of naphthalene-containing fractions". Chemistry and Technology of Fuels and Oils. 5 ...
Naphthalene diimides (NDIs) are often fluorescent, although the intensity is sensitive to substituents. NDIs are also redox- ... Symmetrical naphthalene diimides are synthesized by the condensation reaction of primary amines and the dianhydride. ... These diimides are members of a broader class of compounds called rylenes, oligomers of naphthalene with bonds between the 1 ... Bhosale, Sheshanath V; Jani, Chintan H; Langford, Steven J (2008). "Chemistry of naphthalene diimides". Chem. Soc. Rev. 37 (2 ...
ISBN 978-0-8493-0445-3. Bhosale, Sheshanath V.; Jani, Chintan H.; Langford, Steven J. (2008). "Chemistry of naphthalene ... NTCDI is produced from the parent naphthalene via an intermediate compound naphthalenetetracarboxylic dianhydride. NTCDI is ...
... naphthalene, Na+[C10H8•]−, a strong reducing agent, forms upon mixing Na and naphthalene in ethereal solutions. Sodium ...
The naphthalene route (the Gibbs phthalic anhydride process or the Gibbs-Wohg naphthalene oxidation reaction) has declined ... "Gibbs-Wohl Naphthalene Oxidation". Comprehensive Organic Name Reactions and Reagents. 2010. doi:10.1002/9780470638859.conrr270 ... Early procedures involved liquid-phase mercury-catalyzed oxidation of naphthalene. The modern industrial variant process ... instead uses vanadium pentoxide (V2O5) as the catalyst in a gas-phase reaction with naphthalene using molecular oxygen. The ...
Phthalic anhydride is produced similarly by V2O5-catalysed oxidation of ortho-xylene or naphthalene at 350-400 °C. The equation ... "Gibbs-Wohl Naphthalene Oxidation". Comprehensive Organic Name Reactions and Reagents. 2010. doi:10.1002/9780470638859.conrr270 ...
... and naphthalenes; with addition of fluorocarbons to increase its lubricant properties, an oxidizing agent to make it burn more ...
Also effective are reductants such as sodium or sodium naphthalene. Vitamin B12 has also shown promise. Some micro-organisms ... In the 1930s, the toxicity associated with PCBs and other chlorinated hydrocarbons, including polychlorinated naphthalenes, was ... 2012). Halogenated Biphenyls, Terphenyls, Naphthalenes, Dibenzodioxins and Related Products. Elsevier. p. 24. ISBN ...
ChemCF NL - Sulphonated Naphthalene Formaldehyde Liquid. ChemCF NP - Sulphonated Naphthalene Formaldehyde Powder. Suphuric acid ... In 2010, MCF forayed into the manufacture of sulphonated naphthalene formaldehyde (SNF). SNF is a speciality basic chemical ... 33,000MT of Sulphuric acid and 21,450MT of Sulphonated naphthalene formaldehyde (SNF) annually. The design and engineering of ...
Cerniglia, C. E.; Gibson, D. T. (1977). "Metabolism of naphthalene by Cunninghamella elegans". Applied and Environmental ... naphthalene, fluorene or benzo(a)pyrene. In the case of phenanthrene, C. elegans produces a glucoside conjugate of 1- ...
The Formosan subterranean termite (Coptotermes formosanus) fumigates its nest using naphthalene (known to humans as the main ... such as burying beetles smearing their carcasses with antimicrobials or termites fumigating their nests with naphthalene, to ... burying beetles smearing their carcasses with antimicrobials or termites fumigating their nests with naphthalene) whilst others ... "Termites fumigate their nests with naphthalene". Nature. 392 (6676): 558-559. doi:10.1038/33305. S2CID 4419882. Matsuura, Kenji ...
Naphthalene mothballs are also highly flammable. Insecticides - Typically aerosol application works best[citation needed] if ... There are two types of mothball: early twentieth century ones were often based on naphthalene, while mid twentieth century ones ...
Examples are naphthalene, anthracene, and phenanthrene. In fused aromatics, not all carbon-carbon bonds are necessarily ...
The naphthalene was melted and vaporised by a water jacket, heated by the engine. Organic Rankine cycle Other configurations ... A railway locomotive using solid naphthalene was built by Schneider-Creusot in France in 1913. This had no relation to the ... "French Locomotive Uses Naphthalene As Fuel". Popular Mechanics. May 1914. p. 413.. ... which operated as a petrol engine and once started and warmed up could be switched to naphthalene simply as a cheaper fuel. ...
The naphthalene was melted and vaporised by a water jacket, heated by the engine. "objects". Internalfire.com. 1917-01-01. ... A railway locomotive using solid naphthalene was built by Schneider-Creusot in France in 1913. It was a 70 bhp petrol-paraffin ... "French Locomotive Uses Naphthalene As Fuel". Popular Mechanics. May 1914. p. 413.. ... engine, but using solid naphthalene rather than paraffin, simply as a cheaper fuel. ...
Similarly, Formosan subterranean termites have been known to secrete naphthalene to protect their nests. Soldiers of the ... "Termites fumigate their nests with naphthalene". Nature. 392 (6676): 558-559. Bibcode:1998Natur.392..558C. doi:10.1038/33305. ...
It is similar to naphthalene but one ring is partially saturated. Naphthalene Tetralin Decalin v t e. ...
Examples of molecular solids with quadrupoles are octafluoronaphthalene and naphthalene. Naphthalene consists of two joined ... Naphthalene assembles through the coordination of δ- of one molecules to the δ+ of another molecule. This results in 1D columns ... For naphthalene, this quadrupole manifests in a δ- and δ+ accumulating within and outside the ring system, respectively. ... Alt, H. C.; Kalus, J. (1982). "X-Ray Powder Diffraction Investigation of Naphthalene up to 0.5 GPa". Acta Crystallographica ...
The peri-naphthalene 1-amino-naphthalene-8-sulfonic acid is a precursor to other peri-naphthalenes. It is prepared by nitration ... Several peri-naphthalenes are prepared via nitrations. Dinitration of naphthalene gives 1,8-dinitronaphthalene, which undergoes ... In organic chemistry, peri-naphthalenes are particular derivatives of naphthalene with the formula C10H6-1,8-X2. Owing to the ... Kilian, P.; Knight, F. R.; Woollins, J. D., "Synthesis of ligands based on naphthalene peri-substituted by Group 15 and 16 ...
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Do NOT wash away into sewer. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations ...
Naphthalene. CAS No: 91-20-3. NOTE:. (1) Efficacy of Medical Tests has not been evaluated.. (2) NIOSH references include ... Naphthalene. Editor(s). /Author(s). Specific Medical Test(s) or Examination(s). Reference(s). ...
... naphthalene forms the dark blue-green radical anion salts such as sodium naphthalene, Na+C10H− 8. The naphthalene anions are ... but today petroleum-derived naphthalene represents only a minor component of naphthalene production. Naphthalene is the most ... mostly on toxicity of naphthalene Naphthalene-CDC - NIOSH Pocket Guide to Chemical Hazards Naphthalene in the Pesticide ... 国务院经贸办、卫生部关于停止生产和销售萘丸提倡使用樟脑制品的通知(国经贸调(1993)
naphthalene,. carcinogen. Part of. naphthalene metabolic process (participant),. naphthalene catabolic process (reactant),. ... Naphthalene (th); Naftalín (sk); naftalina (pl); නැප්තලීන්, කපුරු බෝල (si); Naftaline (nl); Naphthalene, Napthalene (ml); ... HK 上環 Sheung Wan 皇后大道中 Queens Road Central shop 殺蟲劑 Naphthalene Saturday morning Dec 2019 SS2.jpg 4,128 × 3,096; 3.82 MB. ... Media in category "Naphthalene". The following 55 files are in this category, out of 55 total. ...
Poisoning from naphthalene destroys or changes red blood cells so they cannot carry oxygen. This can cause organ damage. ... Naphthalene is a white solid substance with a strong smell. ... Naphthalene is a white solid substance with a strong smell. ... Poisoning from naphthalene destroys or changes red blood cells so they cannot carry oxygen. This can cause organ damage. ... Note: Naphthalene can sometimes be found in household products abused as inhalants. ...
Naphthalene , Monograph containing literature references, physical and biological properties and relevant information ...
Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.; Steele, W.V., The thermodynamic properties to the temperature 700 K of naphthalene ... Pearce, J.N.; Tanner, W.B., The heat capacity and the free energy of formation of naphthalene, Proc. Iowa Acad. Sci., 1934, 41 ... I. An improved calorimeter for use from 14 to 300 K. The heat capacity and entropy of naphthalene. J. Am. Chem. Soc., 1933, ... The low temperature thermodynamic properties of naphthalene, 1-methylnaphthalene, 2-methylnaphthalene, 1,2,3,4- ...
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
Naphthalene has caused cancer in animals. Naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene have been found in at least ... Exposure to large amounts of naphthalene may damage or destroy some of your red blood cells. ... Exposure to naphthalene, 1-methylnaphthalene, or 2-methylnaphthalene happens mostly from breathing air contaminated from the ... in naphthalene mothballs. Naphthalene can move from a pregnant womans blood to the unborn babys blood. Naphthalene has been ...
5-Naphthalene ester of isocyanic acid, NDI White to light-yellow, crystalline flakes. ... 1,5-Diisocyanatonaphthalene, 1,5-Naphthalene diisocyanate, 1,5-Naphthalene ester of isocyanic acid, NDI ...
... and Manufacture of Chemical Substances to include polychlorinated naphthalene (with two chlorine atoms) and pentachlorophenol ( ... products with polychlorinated naphthalene (with two chlorine atoms) cannot be imported as ... and Manufacture of Chemical Substances to include polychlorinated naphthalene (with two chlorine atoms) and pentachlorophenol ( ...
Toxicological Profile for Naphthalene, 1-Methylnaphthalene, and 2-Methylnaphthalene. CAS#: Naphthalene 91-20-3; 1- ... Toxicological profile for Naphthalene, 1-Methylnaphthalene, and 2-Methylnaphthalene. Atlanta, GA: U.S. Department of Health and ...
Other naphthalene-derived chemicals include alkyl naphthalene sulfonate surfactants, and the insecticide carbaryl. Naphthalenes ... Where purer naphthalene is required, crude naphthalene can be further purified by recrystallizing it from any of a variety of ... The crude naphthalene resulting from this process is about 95 percent naphthalene by weight. The chief impurity is the sulfur- ... Naphthalenes most familiar use is as a household fumigant, such as in mothballs. In a sealed container of naphthalene pellets ...
"naphthalene". chemister.ru. Retrieved 2014-06-21.. *^ a b c d e f Seidell, Atherton; Linke, William F. (1919). Solubility of ... Naphthalene derivativesEdit. The partial list of naphthalene derivatives includes the following compounds: Name. Chemical ... The point group symmetry of naphthalene is D2h. Electrical conductivityEdit. Pure crystalline naphthalene is a moderate ... Naphthalene in the interstellar mediumEdit. Naphthalene has been tentatively detected in the interstellar medium in the ...
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Toxicology and Carcinogenesis Studies of Naphthalene (CASRN 91-20-3) in F344/N Rats (Inhalation Studies) ... Toxicology and Carcinogenesis Studies of Naphthalene (CASRN 91-20-3) in B6C3F1 Mice (Inhalation Studies) ... Citation: Final Report on the Developmental Toxicity of Naphthalene in Sprague-Dawley (CD) Rats ...
Water , Naphthalene. Find out what is in your tap water ... EWGs Tap Water Database Naphthalene results for Greene County ... Naphthalene. Greene County. - Northwest Reg. Water. Naphthalene is a polycyclic aromatic hydrocarbon, or PAH, released from ...
This chapter provides the diffusion coefficient of nonane in decahydro-naphthalene at different concentrations measured using ... Winkelmann J. (2018) Diffusion coefficient of nonane in decahydro-naphthalene. In: Lechner M.D. (eds) Diffusion in Gases, ... This chapter provides the diffusion coefficient of nonane in decahydro-naphthalene at different concentrations measured using ...
petroleum naphthalene, naphthalene, impurities, color, degradation, ultraviolet radiation, stability, hydrocarbons, bromination ... petroleum naphthalene, naphthalene, impurities, color, degradation, ultraviolet radiation, stability, hydrocarbons, bromination ... Substantially all of the hydrocarbon impurities present in a sample of petroleum naphthalene were identified. The presence of ... Exposure tests on blends of pure naphthalene and hydrocarbons representative of those identified as impurities showed that ...
Chlorinated naphthalenes  Howe, Paul D; Melber, Christine; Kielhorn, Janet; Mangelsdorf, Inge; World Health Organization; ...
Naphthalene, 2,2- (1,2-ethenediyl)bis- NSC33572 .beta., .beta.-Dinaphthylethylene .beta.,.beta.-Dinaphthylethylene 1, 2-Bis(2 ... 2-(2-naphthalen-2-ylethenyl)naphthalene naphthalene
... naphthalene-1,4,5-tricarboxylic acid
Review Group 1 Review Summary Document for Naphthalene (June 10, 2002). *Review Group 2 Review Summary Document for Naphthalene ... Scientific Review of Naphthalene. CASRN 91-20-3. Status: Listed in the Report on Carcinogens (RoC) ... Appendix B: NTP (2000). Toxicology and Carcinogenesis Studies of Naphthalene (CAS No. 91-20-3) in F344/N Rats (Inhalation ... Appendix A: NTP (1992). Toxicology and Carcinogenesis Studies of Naphthalene (CAS No. 91-20-3) in B6C3F1 Mice (Inhalation ...
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.. ...
Naphthalene. ↓Other names: Regulatory process names [2] Trade names [7] IUPAC names [9] ...
Tag: naphthalene. Texas company declines to buy Wyoming gas field after EPA finds benzene water pollution. by Tom Kessler , Nov ...
Workers in tar distillation and naphthalene distillation are exposed to rather low concentrations of naphthalene and methylated ... Concentrations of naphthalene and naphthols in breathing-zone air during a workshift and 1-naphthol and 2-naphthol in urine ... The geometric mean values were as follows: 0.77 and 0.87 mg/m3 for naphthalene, 0.016 and 0.034 mg/m3 for 1-naphthol, 0.012 and ... Naphthalene homologues in air and their metabolites in urine samples were identified by gas chromatography-mass spectrometry. ...
This chapter provides the diffusion coefficient of naphthalene in 2,2,4-trimethyl-pentane at different concentrations measured ... Winkelmann J. (2018) Diffusion coefficient of naphthalene in 2,2,4-trimethyl-pentane. In: Lechner M.D. (eds) Diffusion in Gases ... This chapter provides the diffusion coefficient of naphthalene in 2,2,4-trimethyl-pentane at different concentrations measured ...
Global Dinonyl Naphthalene Sulfonic Acid Sales Market Report 2017 to its huge collection of research... ... 2.2 Global Dinonyl Naphthalene Sulfonic Acid (Volume and Value) by Type. 2.2.1 Global Dinonyl Naphthalene Sulfonic Acid Sales ... 2.3 Global Dinonyl Naphthalene Sulfonic Acid (Volume and Value) by Regions. 2.3.1 Global Dinonyl Naphthalene Sulfonic Acid ... 1 Dinonyl Naphthalene Sulfonic Acid Overview. 1.1 Product Overview and Scope of Dinonyl Naphthalene Sulfonic Acid. 1.2 ...
  • Jinan Yuansheng Chemical Co., Ltd. was founded in 2009 and is focused on Sodium Lignosulfonate,CalciumLignosulfonate, Sodium Naphthalene Sulfonate Formaldehyde, sodium gluconate researching, manufacturing, selling and service more than 7 years. (burrillandco.com)
  • Yellow Sodium Naphthalene Sulfonate Formaldehyde Concrete Water Reducer Admixture Advantages in cement 1. (burrillandco.com)
  • sodium naphthalene sulfonate formaldehyde condensate Product Description sodium naphthalene formaldehyde As the main master batch of various kinds of compound concrete. (lightneasy.org)
  • Description The naphthalene superplasticizer is a chemically synthesized non-air-entrained superplasticizer, with chemical name of naphthalene sulfonate formaldehyde condensate . (lightneasy.org)
  • One of the key factors driving the market is the growing use of NSF (Naphthalene Sulfonate Formaldehyde) in concrete admixtures. (giiresearch.com)
  • 1-Methylnaphthalene and 2-methylnaphthalene are naphthalene-related compounds. (cdc.gov)
  • Because of this unusual structural feature, many unusual compounds are derived from peri-naphthalenes. (wikipedia.org)
  • Other distinctive compounds include the diphosphine 1,8-bis(diphenylphosphino)naphthalene (dppn) and the disulfide, both of which are ligand precursors. (wikipedia.org)
  • Polychlorinated naphthalenes (also known as PCNs or simply CNs) comprise a class of compounds of up to 75 congeners containing from one to eight chlorine atoms per naphthalene molecule. (isotope.com)
  • Crystal structures have been determined of complexes between a 22-mer intramolecular human telomeric quadruplex and two potent tetra-substituted naphthalene diimide compounds, functionalized with positively charged N-methyl-piperazine side-chains. (nih.gov)
  • Since many aromatic compounds are known to be toxic and/or carcinogenic, these bacterial enzymes are important for removing compounds such as benzene, toluene, naphthalene, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, and nitroaromatics from the environment. (asm.org)
  • This compound belongs to the class of organic compounds known as naphthalenes. (hmdb.ca)
  • These are compounds containing a naphthalene moiety, which consists of two fused benzene rings. (hmdb.ca)
  • Naphthalene, the simplest of the fused or condensed ring hydrocarbon compounds composed of two benzene rings sharing two adjacent carbon atoms. (chemicalbook.com)
  • All sodium naphthalene formaldehyde condensate wholesalers & sodium naphthalene formaldehyde condensate manufacturers come from members. (lightneasy.org)
  • Chemical nature : mix salt of naphthalene and phenol sulphonated formaldehyde condensate. (tradeindia.com)
  • Alibaba.com offers 5 kmt sodium naphthalene formaldehyde sulphonate products. (alibaba.com)
  • There are 5 kmt sodium naphthalene formaldehyde sulphonate suppliers, mainly located in Asia. (alibaba.com)
  • The top supplying country is China (Mainland), which supply 100% of kmt sodium naphthalene formaldehyde sulphonate respectively. (alibaba.com)
  • Kmt sodium naphthalene formaldehyde sulphonate products are most popular in Mid East, Southeast Asia, and Africa. (alibaba.com)
  • Do you want to show kmt sodium naphthalene formaldehyde sulphonate or other products of your own company? (alibaba.com)
  • Accordingly, naphthalene is classified as a benzenoid polyaromatic hydrocarbon (PAH). (newworldencyclopedia.org)
  • Naphthalene is a polycyclic aromatic hydrocarbon, or PAH, released from combustion of fossil fuels and waste incinerators, and also used as a moth repellent. (ewg.org)
  • As such, naphthalene is classified as a benzenoid polycyclic aromatic hydrocarbon (PAH). (wikipedia.org)
  • Substantially all of the hydrocarbon impurities present in a sample of petroleum naphthalene were identified. (astm.org)
  • Naphthalene was selected as the target pollutant owing to its abundance in produced water and its chemical property as a typical polycyclic aromatic hydrocarbon. (environmental-expert.com)
  • Naphthalene is an important hydrocarbon raw material and is primarily used to manufacture phthalic anhydride and polyvinyl chloride (PVC) plastics, but is also used in moth repellents and toilet deodorant blocks. (chemicalbook.com)
  • The peri-naphthalene 1-amino-naphthalene-8-sulfonic acid is a precursor to other peri-naphthalenes. (wikipedia.org)
  • It is prepared by nitration of naphthalene-1-sulfonic acid followed by reduction. (wikipedia.org)
  • Sulfonation gives the "alpha" product naphthalene-1-sulfonic acid as the kinetic product but naphthalene-2-sulfonic acid as the thermodynamic product. (wikipedia.org)
  • Global Dinonyl Naphthalene Sulfonic Acid Market 2017 Industry. (mynewsdesk.com)
  • Qyresearchreports include new market research report "Global Dinonyl Naphthalene Sulfonic Acid Sales Market Report 2017" to its huge collection of research reports. (mynewsdesk.com)
  • A new research study presents a comprehensive analysis and understanding of the global Dinonyl Naphthalene Sulfonic Acid market . (mynewsdesk.com)
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  • The textile market uses naphthalene derivatives including naphthalene sulfonic acid and naphthols as a precursor to manufacture dyes and pigments. (reportlinker.com)
  • People who have recently eaten many mothballs containing naphthalene may be forced to vomit. (medlineplus.gov)
  • It is also used as an antiseptic and insecticide, especially in mothballs ( p -Dichlorobenzene may be used instead of naphthalene as a mothball substitute). (newworldencyclopedia.org)
  • The major consumer products made from naphthalene are moth repellents, in the form of mothballs or crystals, and toilet deodorant blocks. (cdc.gov)
  • Mothballs/flakes contain either naphthalene or paradichlorobenzene. (wordnik.com)
  • The purpose of this page is to address the question of the similarities and differences between Directory:BioPerformance Fuel and Naphthalene, the ingredient of past mothballs. (peswiki.com)
  • Scientists who tested the product at the University of Texas at Austin and at a Florida university concluded that the pills are mainly naphthalene, the chemical found in mothballs. (peswiki.com)
  • Called white tar and tar camphor, naphthalene is used in mothballs and moth flakes. (chemicalbook.com)
  • It may still be naphthalene, as the mothballs would have been put in the dresser more than 5 years ago, and probably quite a bit longer than that, since we got the dresser 4 years ago and it's so thoroughly impregnated. (metafilter.com)
  • Our range of Sodium Naphthalene Formaldehyde Powder (SDN) is a powerful suspensibility booster & versatile wetting cum dispersing agent which is largely used by agrochemical formulators. (tradeindia.com)
  • It captures naphthalene-1-carboxamide market trends, pays close attention to naphthalene-1-carboxamide manufacturers and names suppliers. (marketpublishers.com)
  • Winkelmann J. (2018) Diffusion coefficient of nonane in decahydro-naphthalene. (springer.com)
  • Winkelmann J. (2018) Diffusion coefficient of naphthalene in 2,2,4-trimethyl-pentane. (springer.com)
  • The naphthalene (re)assessment was suspended in Dec 2018, but may be restarted as Agency priorities change. (epa.gov)
  • NAPHTHALENE-1-CARBOXAMIDE (CAS 2243-81-4) Market Research Report 2018 aims at providing comprehensive data on naphthalene-1-carboxamide market globally and regionally (Europe, Asia, North America, Latin America etc. (marketpublishers.com)
  • NAPHTHALENE-1-CARBOXAMIDE (CAS 2243-81-4) Market Research Report 2018 contents were worked out and placed on the website in March, 2018. (marketpublishers.com)
  • Please note that NAPHTHALENE-1-CARBOXAMIDE (CAS 2243-81-4) Market Research Report 2018 is a half ready publication and contents are subject to change. (marketpublishers.com)
  • Asia-Pacific dominated the naphthalene market in 2018, owing to the high demand from countries like China and India. (giiresearch.com)
  • The global market size of 1-Fluoro Naphthalene is $XX million in 2017 with XX CAGR from 2013 to 2017, and it is expected to reach $XX million by the end of 2023 with a CAGR of XX% from 2018 to 2023. (marketpublishers.com)
  • Rats and mice that breathed naphthalene vapors daily for a lifetime developed irritation and inflammation of their nose and lungs. (cdc.gov)
  • When mixed with air, naphthalene vapors easily burn. (cdc.gov)
  • When mixed with air, have been found in at least 654, 36, and 412, naphthalene vapors easily burn. (cdc.gov)
  • Rats and mice breathing naphthalene vapors daily for a lifetime had irritated noses and nose tumors and irritated lungs. (chemicalbook.com)
  • The compound 1,8-bis(dimethylboryl)naphthalene is known as hydride sponge because of its high affinity for hydride. (wikipedia.org)
  • 1-Methylnaphthalene is a naphthalene-related compound that is also called alpha methyl naphthalene. (cdc.gov)
  • Another naphthalene-related compound, 2-methylnaphthalene, is also called beta methyl naphthalene. (cdc.gov)
  • 10% of the naphthalene entering the environment is compound that is also called alpha methyl- from coal production and distillation. (cdc.gov)
  • The overall naphthalene derivatives market is estimated to grow $833.00M by 2021, at a compound annual growth rate of ~3.6 percent. (reportlinker.com)
  • Naphthalene is the bicyclic aromatic compound formed from crude oil or coal tar. (pr.com)
  • Naphthalene is found in many essential oils.Naphthalene is an organic compound with formula C10H8. (hmdb.ca)
  • Batch experiments were used to evaluate the effects of aqueous, micellized nonionic surfactants on the microbial mineralization of naphthalene and salicylic acid, an intermediate compound formed in the pathway of microbial degradation of naphthalene. (asm.org)
  • In this paper, the catalytic performance of a newly developed hydrogenation catalyst, platinum supported on mesoporous ZSM-5 (Pt/MZ-5), was tested in naphthalene (model compound of light cycle oil) hydrogenation. (aiche.org)
  • The fusion of one benzene ring to another results in a compound called naphthalene. (ukessays.com)
  • Urinary naphthols as an indicator of exposure to naphthalene. (nih.gov)
  • The relationship between exposure to naphthalene and urinary excretion of naphthols was examined. (nih.gov)
  • Concentrations of naphthalene and naphthols in breathing-zone air during a workshift and 1-naphthol and 2-naphthol in urine collected after the workshift were determined for 102 male workers. (nih.gov)
  • The time-weighted average concentrations of naphthalene and naphthols in the breathing-zone air showed that the exposure level of the workers was rather low. (nih.gov)
  • There was linear dependence (r = 0.76) between the summary concentration of naphthols in urine and the naphthalene concentration in air. (nih.gov)
  • Workers in tar distillation and naphthalene distillation are exposed to rather low concentrations of naphthalene and methylated naphthalenes and naphthols. (nih.gov)
  • Naphthols and 1,4-naphthoquinone identified in the urine appear to be the products of the hydroxylation of naphthalene present in the breathing-zone air. (nih.gov)
  • These findings suggest that the summary concentration of naphthols in urine can be used as a biomarker for naphthalene exposure. (nih.gov)
  • The materials are analyzed by different physicochemical techniques and used as catalysts for propane and naphthalene oxidation in emissions sources. (degruyter.com)
  • Owing to the rigidity of the naphthalene skeleton, these substituents on the 1- and 8-positions are constrained to be relatively close 2.5 Å, which is within the van der Waals radius for many atoms. (wikipedia.org)
  • Japan has amended the Act on the Examination, Regulation, and Manufacture of Chemical Substances to include polychlorinated naphthalene (with two chlorine atoms) and pentachlorophenol (salt or ester) as Class I Specified Chemical Substances. (ul.com)
  • Naphthalene has two benzene ring sharing two carbon atoms in the ortho position. (pr.com)
  • Component of the naphthalene dioxygenase (NDO) multicomponent enzyme system which catalyzes the incorporation of both atoms of molecular oxygen into naphthalene to form cis-(1R,2S)-dihydroxy-1,2-dihydronaphthalene. (uniprot.org)
  • As noted above, a naphthalene molecule is composed of two fused benzene rings. (newworldencyclopedia.org)
  • A naphthalene molecule can be viewed as the fusion of a pair of benzene rings. (wikipedia.org)
  • Naphthalene is an example of a polycyclic aromatic molecule where resonance forms are used to describe the reactivity of these molecules. (ukessays.com)
  • Exposure to naphthalene, 1-methylnaphthalene, or 2-methylnaphthalene happens mostly from breathing air contaminated from the burning of wood, tobacco, or fossil fuels, industrial discharges, or moth repellents. (cdc.gov)
  • Touching fabrics that are treated with moth repellents containing naphthalene. (cdc.gov)
  • The second greatest release of naphthalene is through the use of moth repellents. (cdc.gov)
  • At home, naphthalene can be found in moth repellents. (chemicalbook.com)
  • Naphthalene derivatives including naphthalene-formaldehyde condensates are largely used in the construction industry, as superplasticizers in concrete admixtures to enhance the quality and consistency in its water-to-cement ratio. (reportlinker.com)
  • Woollins, J. D., "Synthesis of ligands based on naphthalene peri-substituted by Group 15 and 16 elements and their coordination chemistry", Coordination Chemistry Reviews 2011, volume 255, 1387-1413. (wikipedia.org)
  • Exposure to large amounts of naphthalene may damage or destroy some of your red blood cells. (cdc.gov)
  • Exposure to naphthalene, 1-methylnaphthalene and 2-methylnaphthalene from eating foods or drinking beverages is unlikely. (cdc.gov)
  • Exposure to large amounts of naphthalene may also cause nausea, vomiting, diarrhea, blood in the urine, and a yellow color to the skin. (cdc.gov)
  • Accelerated ultraviolet exposure tests provided evidence that extremely pure naphthalene is quite color stable. (astm.org)
  • Exposure tests on blends of pure naphthalene and hydrocarbons representative of those identified as impurities showed that methylindenes are uniquely deleterious to ultraviolet stability. (astm.org)
  • This public health statement tells you about naphthalene, 1-methylnaphthalene, and 2-methyl- naphthalene and the effects of exposure to these chemicals. (cdc.gov)
  • of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, If you are exposed to naphthalene, 1-methyl- personal traits and habits, and whether other naphthalene, or 2-methylnaphthalene, many factors chemicals are present. (cdc.gov)
  • naphthalene and the effects of exposure to these chemicals. (cdc.gov)
  • Acute and chronic liver toxicity resulting from exposure to chlorinated naphthalenes at a cable manufacturing plant during World War II. (thefreedictionary.com)
  • After 12-d exposure, tunnels constructed in sand treated with 1- and 2-methoxynaphthalene (0-3 cm 2 ), 1′- and 2′-acetonaphthone (2-9 cm 2 ), 2-naphthalene methanol (14-19 cm 2 ), or 2-isopropylnaphthalene (16-19 cm 2 ) at the rate of 100 mg/kg sand were significantly less than the controls (34 cm 2 ). (bioone.org)
  • Although there is no direct data showing that naphthalene can cause cancer in people, naphthalene exposure can lead to cancer in animals. (chemicalbook.com)
  • Herein we report the synthesis of two 3D PAHs with perylene monoimide (PMI) and naphthalene subunits fused on [3,3,3]propellanes. (rsc.org)
  • These are manufactured from naphthalene flakes by a tabletmaking machine having its ball shape die. (chemicalbook.com)
  • NDOB_PSEU8 Naphthalene 1,2-dioxygenase system, large oxygenase component OS=Pseudomonas sp. (uniprot.org)
  • Purification and properties of ferredoxinNAP, a component of naphthalene dioxygenase from Pseudomonas sp. (asm.org)
  • In organic chemistry, peri-naphthalenes are particular derivatives of naphthalene with the formula C10H6-1,8-X2. (wikipedia.org)
  • Dr. Kevin Belfield , Professor of Chemisty and head of the Chemistry department at the University of Central Florida, tested BioPerformance fuel in comparison to Naphthalene. (peswiki.com)
  • Naphthalene-modified oligonucleotides have been synthesized and characterized with respect to electron transfer chemistry. (caltech.edu)
  • Highly chlorinated naphthalenes induce these enzyme activities in vivo (13-15), and some hexachlorinated and heptachlorinated naphthalenes are as potent as certain coplanar PCBs (16). (thefreedictionary.com)
  • Corrigendum to "Effect of Naphthalene Acetic Acid on the Adventitious Rooting in Shoot Cuttings of Andrographis paniculata (Burm.f. (hindawi.com)
  • In the article titled "Effect of Naphthalene Acetic Acid on the Adventitious Rooting in Shoot Cuttings of Andrographis paniculata (Burm.f. (hindawi.com)
  • Two isomers are then possible for mono-substituted naphthalenes, corresponding to substitution at an alpha or beta position. (wikipedia.org)
  • The residual ground water contamiantion, however, persisted and Petrox bioremediation was implemented to remove the residual low concentrations of MTBE, BTEX, naphthalene and methylnaphthalene isomers. (environmental-expert.com)
  • No comments were found for Accelerated Petrox® Bioremediation of Naphthalene and Methylnaphthalene Isomers . (environmental-expert.com)
  • But fluctuations in crude oil prices and the high level of toxicity of naphthalene derivatives are main restraining factors for the increase of naphthalene derivatives market globally. (reportlinker.com)
  • Protective effect of resveratrol against naphthalene-induced oxidative stress in mice. (nih.gov)
  • Both male and female BALB-c mice were administered with naphthalene (100 mg/kg, i.p.) for 30 days, either along with saline or along with RVT (10mg/kg, orally). (nih.gov)
  • Modern separation and characterization techniques were used as the principal tools in a research investigation designed to reveal the nature of the impurities that, if not carefully controlled, can cause color degradation of petroleum naphthalene. (astm.org)
  • In public restrooms, naphthalene can be found in toilet deodorant blocks. (chemicalbook.com)
  • All msds for naphthalene wholesalers & msds for naphthalene manufacturers come from members. (lightneasy.org)
  • We doesn't provide msds for naphthalene products or service, please contact them directly and verify their companies info carefully. (lightneasy.org)
  • Zirconia-supported gold-promoted cobalt catalysts were synthesized and tested for the complete oxidation of propane and naphthalene. (mdpi.com)
  • Jinan Yuansheng Chemical Technology Co., Ltd. Is specialized in researching, manufacturing, selling and service of sodium lignosulfonate, calcium lignosulfonate, sodium naphthalene formaldehyde, sodium gluconate, coal water slurry additive and so on. (burrillandco.com)
  • The major commercial use of naphthalene is to make other chemicals used in making polyvinyl chloride (PVC) plastics. (cdc.gov)
  • The major commercial use of possibility exists that the number of sites at which naphthalene is to make other chemicals used in naphthalene, 1-methylnaphthalene, and 2-methyl- making polyvinyl chloride (PVC) plastics. (cdc.gov)
  • There's still no information about other oil-related air toxic chemicals such as naphthalene or hydrogen sulfide, offshore. (wordnik.com)
  • The soil has low levels of lead and semi-volatile chemicals, such as naphthalene , which also need to be addressed. (wordnik.com)
  • Upon selective irradiation of the naphthalene moiety at 340 nm, photoreduction of a distal electron trap, 5-bromouridine, embedded in the DNA base stack occurs. (caltech.edu)
  • Naphthalene enters the environment from industrial and domestic sources, and from accidental spills. (cdc.gov)
  • Naphthalene enters the environment from industrial uses, from its use as a moth repellent, from the burning of wood or tobacco, and from accidental spills. (cdc.gov)
  • This report also provides analysis and description of the major drivers and restraints affecting global Naphthalene market. (pr.com)
  • Albany, NY, August 19, 2016 --( PR.com )-- Market Research HUB has announced the addition of the 'Global Naphthalene Market Research 2021' report to their huge collection of market research reports. (pr.com)
  • The market for naphthalene is expected to register a CAGR of over 3% during the forecast period. (giiresearch.com)
  • The increasing application in the textile industry is also likely to boost the demand for naphthalene during the forecast period. (giiresearch.com)
  • Overall, naphthalene sulfonate is likely to continue dominating the market during the forecast period. (giiresearch.com)
  • Note: Naphthalene can sometimes be found in household products abused as inhalants. (medlineplus.gov)
  • Mono-substitution of naphthalene has two possible isomeric products, corresponding to substitution at an alpha or beta position, respectively. (newworldencyclopedia.org)
  • The naphthalene are found may increase in the future as major consumer products made from naphthalene more sites are evaluated. (cdc.gov)
  • Fuels such as petroleum and coal contain naphthalene. (cdc.gov)
  • Naphthalene sulphate formaldehyde is light yellow to yellow-brown powder, an anionic surfactant. (lightneasy.org)
  • SUNLIGHT CORPORATION is listed in Trade India's list of verified sellers offering supreme quality of Sodium Naphthalene Formaldehyde Powder (SDN), Sodium Naphthalene Formaldehyde 2612 Powder, Sodium Naphthalene Formaldehyde 2605 Powder etc. (tradeindia.com)
  • Aeroxide ® P25 nano-scale TiO 2 powder was immobilized on glass slides by a heat attachment method and its photocatalytic capacity was compared to that of the original powder in terms of naphthalene removal efficiency. (environmental-expert.com)
  • The industry demand from the textile market is driving the naphthalene derivatives market. (reportlinker.com)
  • The powdered form was the most important market of naphthalene derivatives in 2015. (reportlinker.com)
  • The logistics of operations of the powdered form of naphthalene derivatives including organization, packaging and shipment is easy in comparison to the liquid form. (reportlinker.com)
  • This is a critical factor responsible for the increase ot the powdered form in the overall naphthalene derivatives market. (reportlinker.com)
  • Construction is the biggest and the quickest increasing application segment in the overall naphthalene derivatives market. (reportlinker.com)
  • Rising use of naphthalene formaldehyde condensates in the construction industry is driving the overall market for naphthalene derivatives. (reportlinker.com)
  • The Asia Pacific (APAC) area is the quickest developing market for naphthalene derivatives, in terms of value importance and quantity. (reportlinker.com)
  • the strong industrial base in the construction and textiles applications, and increase in the standards of living, are the main factors providing to the increase of the naphthalene derivatives market in this area. (reportlinker.com)
  • The industry report includes naphthalene derivatives and its forms, types and applications across various industry verticals and territories. (reportlinker.com)
  • In laboratory choice tests with either filter paper treatment or sand treatment, naphthalene and 10 derivatives were evaluated for their effects on the behavior of the Formosan subterranean termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae). (bioone.org)
  • Naphthalene and six other derivatives were not effective at 50 µ g/cm 2 -treated filter paper. (bioone.org)
  • Like benzene , naphthalene can undergo electrophilic aromatic substitution. (newworldencyclopedia.org)
  • For many electrophilic aromatic substitution reactions, naphthalene is more reactive than benzene, and reacts under milder conditions than does benzene. (newworldencyclopedia.org)
  • However, the solid shows semiconducting character below 100 K. In electrophilic aromatic substitution reactions, naphthalene reacts more readily than benzene. (wikipedia.org)
  • Naphthalene undergoes electrophilic substitution rather than addition. (ukessays.com)
  • The mild conditions required for this process prove that naphthalene is activated with respect to electrophilic aromatic substitution. (ukessays.com)
  • Officials from BioPerformance say that BioPerformance fuel is safe and does not contain Naphthalene. (peswiki.com)
  • Does BioPerformance contain Naphthalene? (peswiki.com)
  • Naphthalene is a white solid substance with a strong smell. (medlineplus.gov)
  • Naphthalene has a strong but not unpleasant smell. (cdc.gov)
  • You can smell naphthalene in the air at a concentration of 84 parts naphthalene per one billion parts (ppb) of air. (cdc.gov)
  • Its taste and odor of the naphthalene released to the atmosphere can have not been described, but you can smell it in be attributed to the losses from naphthalene water when only 7.5 ppb are present. (cdc.gov)
  • You can sometimes smell naphthalene in the air or in water. (chemicalbook.com)