A greenish-yellow, diatomic gas that is a member of the halogen family of elements. It has the atomic symbol Cl, atomic number 17, and atomic weight 70.906. It is a powerful irritant that can cause fatal pulmonary edema. Chlorine is used in manufacturing, as a reagent in synthetic chemistry, for water purification, and in the production of chlorinated lime, which is used in fabric bleaching.
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
Dictionaries as Topic
A group of compounds containing the porphin structure, four pyrrole rings connected by methine bridges in a cyclic configuration to which a variety of side chains are attached. The nature of the side chain is indicated by a prefix, as uroporphyrin, hematoporphyrin, etc. The porphyrins, in combination with iron, form the heme component in biologically significant compounds such as hemoglobin and myoglobin.
An enzyme that catalyzes the tetrapolymerization of the monopyrrole PORPHOBILINOGEN into the hydroxymethylbilane preuroporphyrinogen (UROPORPHYRINOGENS) in several discrete steps. It is the third enzyme in the 8-enzyme biosynthetic pathway of HEME. In humans, deficiency in this enzyme encoded by HMBS (or PBGD) gene results in a form of neurological porphyria (PORPHYRIA, ACUTE INTERMITTENT). This enzyme was formerly listed as EC 22.214.171.124
Dose-specific production of chlorinated quinone and semiquinone adducts in rodent livers following administration of pentachlorophenol. (1/17)Production of chlorinated quinoid metabolites was investigated in the livers of Sprague-Dawley rats and B6C3F1 mice following single oral administration of pentachlorophenol (PCP) (0-40 mg/kg body weight) and in male Fischer 344 rats, following chronic ingestion of PCP at 1,000 ppm in the diet for 6 months (equivalent to 60 mg PCP/kg body weight/day). Analyses of the rates of adduction in the livers of Sprague-Dawley rats and B6C3F1 mice suggested that the production of tetrachloro-1,2-benzosemiquinone (Cl4-1,2-SQ) adducts was proportionally greater at low doses of PCP (less than 4-10 mg/kg body weight) and was 40-fold greater in rats than in mice. Production of tetrachloro-1,4-benzoquinone (Cl4-1,4-BQ) adducts, on the other hand, was proportionally greater at high doses of PCP [greater than 60-230 mg/kg body weight] and was 2- to 11-fold greater in mice than in rats over the entire range of dosages. A mathematical model employed these data to predict the rates of daily adduct production and steady state levels of PCP-derived quinone and semiquinone adducts in rats and mice. To evaluate predictions of the model, levels of PCP-derived adducts at steady state were investigated in the livers of male Fischer 344 rats chronically ingesting 60 mg PCP/kg body weight/day. Levels of total Cl4-1,4-BQ-derived adducts in liver cytosolic proteins (Cp) (22.0 nmol/g) and in liver nuclear proteins (Np) (3.07 nmol/g) were comparable to those of model predictions (15.0 and 3.02 nmol/g for Cp and Np, respectively). Overall, these results suggest that species differences in the metabolism of PCP to semiquinones and quinones were, in part, responsible for the production of liver tumors in mice but not rats in chronic bioassays. (+info)
Oxidative damage and direct adducts in calf thymus DNA induced by the pentachlorophenol metabolites, tetrachlorohydroquinone and tetrachloro-1,4-benzoquinone. (2/17)DNA damage induced by quinoid metabolites of pentachlorophenol (PCP), i.e. tetrachloro-1,4-benzoquinone (Cl(4)BQ) and tetrachlorohydroquinone (Cl(4)HQ), was investigated in calf thymus DNA. The (32)P-post-labeling assay revealed four major and several minor adducts (3.5 adducts per 10(5) total nucleotides) that were produced in calf thymus DNA treated with Cl(4)BQ (5 mM). These DNA adducts were chemically stable even after conditions that induce thermal depurination and are unlikely to undergo depurination/depyrimidination to form apurinic/apyrimidinic (AP) sites. In addition, increases in 8-hydroxy-deoxyguanosine (8-HO-dG) (5 8-HO-dG per 10(5) nucleotides) and AP sites (0.5 AP sites per 10(5) nucleotides) were observed in Cl(4)BQ-modified calf thymus DNA. Further investigation indicated that in the presence of Cu(II) and NADPH, low concentrations of Cl(4)BQ (1 microM) induced a doubling of 8-HO-dG (10 8-HO-dG per 10(5) nucleotides) and dramatic increases in AP sites (20 AP sites per 10(5) nucleotides) and DNA single-strand breaks. The types of DNA damage induced by Cl(4)HQ plus Cu(II) were similar to those by Cl(4)BQ plus Cu(II) and NADPH, whereas catalase inhibited the formation of DNA damage. These data suggest that oxidative damage is causally involved in the formation of AP sites. Concentration-dependent increases in 8-HO-dG induced by Cl(4)HQ plus Cu(II) and Cl(4)BQ plus Cu(II) and NADPH were correlated with the formation of AP sites (r(2) = 0.977) with a ratio of 8-HO-dG to AP sites at 1:1.6. The AP site-cleavage assay confirmed that approximately 85% of the AP sites induced by Cl(4)HQ and Cu(II) were detected as 5'-cleaved AP sites. Since hydrogen peroxide alone causes similar DNA damage, these results suggest the involvement of Cu(II) and hydrogen peroxide in the induction of oxidative DNA damage by Cl(4)HQ/Cl(4)BQ. The data demonstrate that PCP quinone and hydroquinone induce direct and oxidative base modifications as well as the formation of 5'-cleaved AP sites in genomic DNA. These lesions may have important implications for PCP clastogenicity and carcinogenicity. (+info)
Association of quinone-induced platelet anti-aggregation with cytotoxicity. (3/17)Various anti-platelet drugs, including quinones, are being investigated as potential treatments for cardiovascular disease because of their ability to prevent excessive platelet aggregation. In the present investigation 3 naphthoquinones (2,3-dimethoxy-1,4-naphthoquinone [DMNQ], menadione, and 1,4-naphthoquinone [4-NQ]) were compared for their abilities to inhibit platelet aggregation, deplete glutathione (GSH) and protein thiols, and cause cytotoxicity. Platelet-rich plasma, isolated from Sprague-Dawley rats, was used for all experiments. The relative potency of the 3 quinones to inhibit platelet aggregation, deplete intracellular GSH and protein thiols, and cause cytotoxicity was 1,4-NQ > menadione >> DMNQ. Experiments using 2 thiol-modifying agents, dithiothreitol (DTT) and 1-chloro-2,4-dintrobenzene (CDNB), confirmed the key roles for GSH in quinone-induced platelet anti-aggregation and for protein thiols in quinone-induced cytotoxicity. Furthermore, the anti-aggregative effects of a group of 12 additional quinone derivatives were positively correlated with their ability to cause platelet cytotoxicity. Quinones that had a weak anti-aggregative effect did not induce cytotoxicity (measured as LDH leakage), whereas quinones that had a potent anti-aggregative effect resulted in significant LDH leakage (84-96%). In one instance, however, p-chloranil demonstrated a potent anti-aggregative effect, but did not induce significant LDH leakage. This can be explained by the inability of p-chloranil to deplete protein thiols, even though intracellular GSH levels decreased rapidly. These results suggest that quinones that deplete GSH in platelets demonstrate a marked anti-aggregative effect. If this anti-aggregative effect is subsequently followed by depletion of protein thiols, cytotoxicity results. (+info)
Mechanistic appraisal of the charge-transfer complexes of promethazine with chloranil: a modelling approach. (4/17)Various mechanisms are often used to explain the interaction between electron donors and acceptors. Commonly proposed mechanisms are those in which the acceptor interacts with the aromatic pi-systems in the donor molecule or the acceptor forms a weak interaction of the Lewis acid with Lewis base type. In this study, the above mechanisms were examined as well as other possible mechanisms. Promethazine was chosen as the model drug containing aromatic systems capable of pi-pi interaction as well as N-methyl group capable of forming a complex with the weak Lewis acid, p-chloranil. Our modelling studies revealed that the situation where the p-chloranil interacts with a protonated N-methyl group is the most significant mechanism of interaction, based on the calculated energies for the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), the Tripos force field energy terms and also the stability of the complexes during molecular dynamics simulations. (+info)
A previously unrecognized step in pentachlorophenol degradation in Sphingobium chlorophenolicum is catalyzed by tetrachlorobenzoquinone reductase (PcpD). (5/17)The first step in the pentachlorophenol (PCP) degradation pathway in Sphingobium chlorophenolicum has been believed for more than a decade to be conversion of PCP to tetrachlorohydroquinone. We show here that PCP is actually converted to tetrachlorobenzoquinone, which is subsequently reduced to tetrachlorohydroquinone by PcpD, a protein that had previously been suggested to be a PCP hydroxylase reductase. pcpD is immediately downstream of pcpB, the gene encoding PCP hydroxylase (PCP monooxygenase). Expression of PcpD is induced in the presence of PCP. A mutant strain lacking functional PcpD has an impaired ability to remove PCP from the medium. In contrast, the mutant strain removes tetrachlorophenol from the medium at the same rate as does the wild-type strain. These data suggest that PcpD catalyzes a step necessary for degradation of PCP, but not for degradation of tetrachlorophenol. Based upon the known mechanisms of flavin monooxygenases such as PCP hydroxylase, hydroxylation of PCP should produce tetrachlorobenzoquinone, while hydroxylation of tetrachlorophenol should produce tetrachlorohydroquinone. Thus, we proposed and verified experimentally that PcpD is a tetrachlorobenzoquinone reductase that catalyzes the NADPH-dependent reduction of tetrachlorobenzoquinone to tetrachlorohydroquinone. (+info)
Simultaneous spectrophotometric determination of p-benzoquinone and chloranil after microcrystalline naphthalene extraction by using genetic algorithm-based wavelength selection-partial least squares regression. (6/17)Microcrystalline naphthalene extraction has been used for the preconcentration of p-benzoquinone and tetrachloro-p-benzoquinone (chloranil), after their reaction by aniline, and later simultaneous spectrophotometric analysis by genetic algorithm-partial least squares (GA-PLS) calibration. The chemical variables affecting the analytical performance of the methodology were studied and optimized. Under the optimum conditions i.e., [aniline] = 0.05 M and [naphthalene] = 2.2% (w/v), preconcentration of 25 ml of sample solution permitted the detection of 0.32 and 0.23 microg ml(-1) for p-benzoquinone and chloranil, respectively. The predictive abilities of partial least squares regression (PLS) and genetic algorithm-partial least squares regression (GA-PLS) were examined for simultaneous determination of two quinones. The GA-PLS shows superiority over other PLS methods due to the wavelength selection in PLS calibration using a genetic algorithm without loss of prediction capacity, provides useful information about the chemical system. (+info)
Oxidative dimer produced from a 2,3,4-trihydroxybenzoic ester. (7/17)The DPPH radical-scavenging abilities of the naturally occurring phenolic acid, 2,3,4-trihydroxybenzoic acid, and its methyl ester were evaluated. Both compounds in acetonitrile scavenged as many as four radicals compared to three or fewer radical consumption in acetone or ethanol. Only the ester showed relatively high ability in methanol. Oxidation with o-chloranil in acetonitrile resulted in methyl 2,3,4-trihydroxybenzoate giving a novel benzocoumarin-type dimer, its chemical structure being confirmed by spectroscopic evidence. The formation of this dimer might partly account for the higher radical-scavenging efficiency of the ester in acetonitrile or methanol. (+info)
Flow-injection spectrophotometric determination of azithromycin in pharmaceutical formulations using p-chloranil in the presence of hydrogen peroxide. (8/17)A flow-injection (FI) spectrophotometric procedure exploiting merging zones is proposed for the determination of azithromycin in pharmaceutical formulations. The method is based on the reaction of azithromycin with tetrachloro-p-benzoquinone (p-chloranil) accelerated by hydrogen peroxide and conducted in a methanol medium, producing a purple-red color compound (lambda(max) = 540 nm). The FI system and the experimental conditions were optimized using a multivariate method. Beer's law is obeyed in a concentration range of 50 - 1600 microg mL(-1) with an excellent correlation coefficient (r = 0.9998). The detection limit and the quantification limit were 6.6 and 22.1 microg mL(-1), respectively. No interference was observed from the common excipients, and the recoveries were within 98.6 to 100.4%. The procedure was applied to the determination of azithromycin in pharmaceuticals with a high sampling rate (65 samples h(-1)). The results obtained by the proposed method were in good agreement with those obtained by the comparative method at 95% confidence level. (+info)
Chloranil | Article about chloranil by The Free Dictionary
Looking for chloranil? Find out information about chloranil. C6Cl4O2 Yellow leaflets melting at 290°C; soluble in organic solvents; made from phenol by treatment with potassium chloride and hydrochloric acid; used as... Explanation of chloranil
IJMS | Free Full-Text | Biochemical Characterization of the Tetrachlorobenzoquinone Reductase Involved in the Biodegradation of...
Pentachlorophenol (PCP), a xenobiocide used to preserve lumbers, is a major environmental pollutant in North America. In spite of an expected high resistance to biodegradation, a number of aquatic and soil bacteria can degrade PCP. In this study, we cloned, expressed and purified tetrachlorobenzoquinone reductase (PcpD), the second enzyme in the PCP biodegradation pathway in Sphingobium chlorophenolicum. PcpD, present mainly as a homo-trimer, exhibited low but statistically significant activity in the reduction of tetrachlorobenzoquinone to tetrachlorohydroquinone. The optimal pH for PcpD activity was 7.0. PcpD was stimulated by tetrachlorohydroquinone at low concentrations but inhibited at high concentrations. Because of the constitutive expression and relatively high catalytic efficiency of downstream enzyme tetrachlorohydroquinone reductive dehalogenase, tetrachlorohydroquinone was unlikely to accumulate in high concentrations, suggesting that PcpD would only be stimulated by tetrachlorohydroquinone
Studies on the active site of rat glutathione S-transferase isoenzyme 4-4. Chemical modification by tetrachloro-1,4...
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Brevet US4545382 - Sensor for components of a liquid mixture - Google Brevets
A sensor electrode to detect one or more components in a liquid mixture comprises an electrically conductive material having at least an an external surface, the combination of an enzyme catalytic for a reaction of the desired component, and a mediator compound which transfers electrons from the enzyme to the electrode when such catalytic activity takes place. It can be used as an in vivo glucose sensor either with a silver electrode coated with e.g. glucose oxidase and a polyviologen as the mediators, or with a particulate carbon electrode, glucose oxidase and chloranil or fluoranil as mediator. Another system is to use bacterial glucose dehydrogenase or glucose oxidase as the enzyme and/or ferrocene or a ferrocene derivative as the mediators compound to give electrodes with improved linearity, speed of response and insensitivity to oxygen.
BENZOYL CHLORIDE, CHLOROSOLPHONIC ACID PURE, CALCIUM HYPOPHOSPHITE, CHLORAL [TRICHLOROACETALDEHYDE], CHLORANIL, ETHER ANHYDROUS, GUM ACACIA, GUM ARABIC, GUM GUAR POWDER, HYPOPHOSPHORUS ACID, ISATOIC ANHYDRIDE, ISOBUTYLENE, LEAD SUB - ACETATE, MERCURY NITRATE, MERCURY CHLORIDE, METHYL TERTBUTYL ETHER, MAGNESIUM HYPOPHOSPHITE, p - NITROBENZOIC ACID METHYL ESTER, p - NITROMETHYLBENZOATE, POLY ALUMINIUM CHLORIDE, POTASH ALUM, POTASSIUM BICARBONATE, POTASSIUM HYDROXIDE PELLETS, PYROPHOSPHORYL CHLORIDE, SODIUM HYDROXIDE PELLETS, STANNOUS CHLORIDE, STANNIC CHLORIDE, TETRAPOTASSIUM PYROPHOSPHATE, TRICHLOROACETIC ACID, TRICLOSAN, TRIMETHYL CHLOROSILANE
Purification and kinetic mechanism of the major glutathione S-transferase from bovine brain | Biochemical Journal
The major glutathione S-transferase isoenzyme from bovine brain was isolated and purified approx. 500-fold. The enzyme has a pI of 7.39 +/- 0.02 and consists of two non-identical subunits having apparent Mr values of 22,000 and 24,000. The enzyme is uniformly distributed in brain, and kinetic data at pH 6.5 with 1-chloro-2,4-dinitrobenzene (CDNB) as substrate suggest a random rapid-equilibrium mechanism. The kinetics of inhibition by product, by GSH analogues and by NADH are consistent with the suggested mechanism and require inhibitor binding to several different enzyme forms. Long-chain fatty acids are excellent inhibitors of the enzyme, and values of 1nKi for hexanoic acid, octanoic acid, decanoic acid and lauric acid form a linear series when plotted as a function of alkyl chain length. A free-energy change of -1900 J/mol (-455 cal/mol) per CH2 unit is calculated for the contribution of hydrophobic binding energy to the inhibition constants. The turnover number of the purified enzyme dimer ...
ChemIDplus - 16325-38-5 - UXIKMAOGSBQRNJ-UHFFFAOYSA-N - Benzene, 1,2,4,5-tetrachloro-3,6-bis(isocyanatomethyl)- - Similar...
16325-38-5 - UXIKMAOGSBQRNJ-UHFFFAOYSA-N - Benzene, 1,2,4,5-tetrachloro-3,6-bis(isocyanatomethyl)- - Similar structures search, synonyms, formulas, resource links, and other chemical information.
ChemIDplus - 16669-42-4 - OJTHLNYBRBMCBW-UHFFFAOYSA-N - Phenol, 4,4-(1-methylethylidene)bis(2,3,5,6-tetrachloro- - Similar...
16669-42-4 - OJTHLNYBRBMCBW-UHFFFAOYSA-N - Phenol, 4,4-(1-methylethylidene)bis(2,3,5,6-tetrachloro- - Similar structures search, synonyms, formulas, resource links, and other chemical information.
Abstract for TR-114
2,3,5,6-Tetrachloro-4-nitroanisole, an agricultural fungicide and acaricide, was selected for bioassay by the National Cancer Institute because of its structural similarity to pentachloronitrobenzene, a pesticide classified as tumorigenic by the Secretarys Commission on Pesticides and their Relationship to Environmental Health.. A bioassay for possible carcinogenicity of 2,4,5,6-tetrachloro-4-nitroanisole was conducted using Fischer 344 rats and B6C3F1 mice. 2,3,5,6-Tetrachloro-4-nitroanisole was administered in the feed, at either of two concentrations, to groups of male and female animals of each species. The high and low dietary concentrations used in the chronic bioassay were 0.012 and 0.006 percent, respectively, for both species. After a 104-week period of chemical administration, observation of rats continued for up to 3 weeks and observation of mice continued for up to 1 week. For rats 50 animals of each sex were placed on test as controls, while for mice 55 animals of each sex were ...
4,4,5,5,-tetrachloro-1,3-dioxolan-2-one - Registration Dossier - ECHA
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
JC-1 | Cell Organelle Stains | Fluorescence Technology | Products | MoBiTec Molecular Biotechnology
JC-1 (5,5′,6,6′-Tetrachloro-1,1′,3,3′-tetraethylbenzimidazolylcarbocyanine chloride) is a mitochondrial dye that stains mitochondria in living cells …
Imatinib Mesylate enzyme inhibitor - effects on platelets and insulin sensitivity, using AZD6482 a novel PI3Kβ inhibitor
Supplementary Materials Supporting Information supp_111_18_6690__index. novo Dnmt activity, we conducted methylC-sequencing (methylC-seq) on DKO mESCs. Thousands of regions with higher than average mCG levels, which we term enriched residual methylation loci (ERML), were identified. We further show that persistence of mCG at a subset of these loci, including ERVs, germ-line genes, and a subgroup of imprinted DMRs, is dependent upon Setdb1. Finally, we provide evidence that Setdb1-mediated H3K9me3 promotes the stability of mCG at ERML at least in part by inhibiting Tet-dependent oxidation in these areas. Outcomes Characterization of Enriched Residual Methylation Loci in DKO mESCs. To comprehensively map the genomic areas that stay hypermethylated in the lack of the de novo Dnmts, we examined the genome-wide distribution of DNA methylation in past due passing DKO (passing 33) and WT (passing 39) parental mESCs by methylC-seq. In keeping with earlier studies, we discovered that apart from nearly ...
Indian Journal of Chemistry
Vibrational spectra of CT complexes of acridine orange. Sagar Agravat, Vishal Jain & A T Oza*. Received 4 May 2007; revised 31 January 2008. Infrared spectra of acridine orange and its charge transfer complexes with acceptors such as chloranil, 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ), 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) and tetracyano-p-ethylene (TCNE) are reported here. Their photo conducting nature is explained with two absorption edges in infrared range associated with non-equivalent sites of chloride ion or formation of bonding, non-bonding and antibonding orbitals. The mid-IR transition is usually direct and the low-energy transition is indirect. Whether the transition is allowed or forbidden depends on average intermolecular distance. This differs from ordinary ternary complexes in which two acceptors give rise to two conduction bands. Also, there is absence of any screening found in two donor based ternary systems. There is some band tailing of phonon bands in absorption ...
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Sequestration of a highly reactive intermediate in an evolving pathway for degradation of pentachlorophenol | Proceedings of...
Although previous studies have addressed the consequences of treating cells (5) or nucleosides (7) with TCBQ, the rates of physiologically relevant reactions between TCBQ and nucleophiles have not been examined. TCBQ reacts with thiols with rate constants ,1.4 × 106-1.3 × 107 M−1⋅s−1 at pH 7. The apparent decrease in reactivity going from cysteine to glutathione to β-ME correlates with their pKas (8.2, 9.2, and 9.6, respectively) (Fig. S1) and is consistent with the reactive moiety being the thiolate. Given these pKa values, 6%, 0.6%, and 0.3% of the thiols will be deprotonated at pH 7 for cysteine, glutathione, and β-ME, respectively. Thus, the rate constant for reaction between TCBQ and thiolates is ,108 M−1⋅s−1 , essentially the diffusion-controlled limit. It is important to note that each molecule of TCBQ can react with multiple thiols, leading to depletion of up to four molecules of glutathione per TCBQ (23). Further, reaction of TCBQ with multiple thiols can lead to ...
Chlorisondamine Chloride,4,5,6,7-Tetrachloro-2,3-dihydro-2-methyl-2-[2-(trimethylammonio)ethyl]-2H-isoindolium dichloride,4,5,6,7-tetrachloro-2-(2-dimethylaminoethyl)-2-methylisoindolinium chloride methochloride,4,5,6,7-tetrachloro-2-(2-dimethylaminoethyl)isoindoline dimethylchloride,N-[(2-dimethylammonium)ethyl]-4,5,6,7-tetrachloroisoindolinium dimethochloride,chlorisondamine dimethochloride,Ecolid
Chirale Butadiene 6. Behinderte Rotation an penta- und hexasubstituierten Butadienen - Stützeffekte - University of Regensburg...
A series of hexasubstituted butadienes of type A was prepared representing (E,E)-1,2,3,4-tetrachloro-5-methoxy-1,3-pentadienes (7) substituted by different terminal residues R. 1H n.m.r. data of diastereotopic methylene protons served to determine the barriers of rotation around the central CC single bond of the butadienes A. The considerable dependence of this barrier (ΔGmath image = 12.8-21.1 kcal/mole) upon the size of the terminal substituents R ist discussed in terms of a buttressing effect of these groups. ...
Statistics Questions - Least Squares Regression
Here you can post any question you have that is not already covered elsewhere on the site or respond to the posts of other members if you know the answer to their question. When posting a question, please include the text of the problem you want answered. I will try to respond quickly, and when necessary, I will even include a video response. Finally, your question may have been asked already, so be sure to check the categories below before posting.. Recently asked questions for category: Least Squares Regression ...
Irreversible Inhibition - Biochemistry Video | Clutch Prep
Video explaining Irreversible Inhibition for Biochemistry. This is one of many videos provided by Clutch Prep to prepare you to succeed in your college classes.
P-Benzoquinone CAS 106-51-4 Benzoquinone p-Benzoquinone P-quinone PBQ Quinone from China manufacturer - MOSINTER GROUP LIMITED
Product Details of P-Benzoquinone CAS 106-51-4 Benzoquinone p-Benzoquinone P-quinone PBQ Quinone, P-Benzoquinone CAS 106-51-4 Benzoquinone p-Benzoquinone P-quinone PBQ Quinone from China manufacturer on Hisupplier.com.
P-Benzoquinone at Best Price in Navi Mumbai, Maharashtra | SHILPA INTERNATIONAL SPECIALTIES
Buy low price P-Benzoquinone online from SHILPA INTERNATIONAL SPECIALTIES based in BELAPUR-CBD-BELAPUR, Navi Mumbai. Get product specifications and salient feature of P-Benzoquinone along with company address and contact details.
Poly-vinylidene-fluoride/p-benzoquinone gel polymer electrolyte with good performance by redox mediator effect for Li-Air...
TY - JOUR. T1 - Poly-vinylidene-fluoride/p-benzoquinone gel polymer electrolyte with good performance by redox mediator effect for Li-Air battery. AU - Kim, Young Bok. AU - Kim, Il To. AU - Song, Myeong Jun. AU - Shin, Moo Whan. PY - 2016/8/20. Y1 - 2016/8/20. N2 - In this study, the poly-vinylidene fluoride (PVDF)/p-benzoquinone (pBQ) gel polymer electrolyte (GPE) is synthesized well with LiTFSI/TEGDME for Li-Air battery (LAB) applications. The PVDF/pBQ GPEs are characterized by electrochemical analysis and compared to the PVDF GPE. We confirm that pBQ molecule in PVDF GPE shows redox mediate behavior during charge-discharge process. Employing PVDF/pBQ GPE for LAB leads to an improved cycleability from 2 to over 30. In addition it results in a charge voltage decrease from around 4.2 V to around 3.3 V. The energy cycle efficiency (ECE) is improved about 15%. The pBQ accelerates to the formation of an amorphous phase on synthesized PVDF GPE matrix by acting inhibitor for polymerization. It leads ...
ROS-triggered signaling pathways involved in the cytotoxicity and tumor promotion effects of pentachlorophenol and...
Free radical-triggered tissue damage is believed to play an essential role in a variety of human diseases. Pentachlorophenol (PCP) is applied as a pesticide worldwide in both industries and homes. It is used extensively as a biocide and wood preservative. Tetrachlorohydroquinone (TCHQ) was proved as a major toxic metabolite of PCP, contributing the release of free radicals during PCP metabolism. PCP has been proposed as a tumor promoter; however, only limited knowledge is available regarding the mechanisms of tumor promotion induced by PCP and its metabolite, TCHQ. A growing amount of literature suggests that a link between reactive oxygen species (ROS) and tumor promotion could exist. Herein, we summarize the findings regarding the ROS-triggered signaling pathways involved in the cytotoxicity and tumor promotion effects of PCP and TCHQ. Some of the notable findings demonstrated that TCHQ can induce DNA lesions and glutathione depletion in mammalian cells; meanwhile, oxidative stress and apoptosis
Showing Compound Gallic acid (FDB000662) - FooDB
Gallic acid, also known as gallate or acid, gallic, belongs to the class of organic compounds known as gallic acids. These are organic compounds that contain a 3,4,5-trihydroxybenzoic acid moiety. Gallic acid is an extremely weak basic (essentially neutral) compound (based on its pKa). Gallic acid exists in all living species, ranging from bacteria to humans. Outside of the human body, Gallic acid is found, on average, in the highest concentration within a few different foods, such as mango, pomegranates, and cloves and in a lower concentration in red raspberries, cumins, and turnips. Gallic acid has also been detected, but not quantified in, several different foods, such as common walnuts, tarragons, gingers, fruit juices, and corns. This could make gallic acid a potential biomarker for the consumption of these foods. A trihydroxybenzoic acid in which the hydroxy groups are at positions 3, 4, and 5 ...
Tetrachloroethane Compound Information and Applications for GC (Gas Chromatography) and LC (Liquid Chromatography) Analysis /...
Ethane, 1,1,2,2-tetrachloro-; S-Tetrachloroethane; Acetylene tetrachloride; Bonoform; Cellon; Tetrachloroethane; 1,1,2,2-Tetrachloroethane; (CHCl2)2; NCI-C03554; Tetrachlorethane; Tetrachlorure dacetylene; TCE; 1,1-Dichloro-2,2-dichloroethane; 1,1,2,2-Czterochloroetan; 1,1,2,2-Tetrachloorethaan; 1,1,2,2-Tetrachloraethan; 1,1,2,2-Tetrachlorethane; 1,1,2,2-Tetracloroetano; Rcra waste number U209; sym-Tetrachloroethane; Westron; Acetosol; Cellon, bonoform; Westrol; 1,1,2,2- ...
Data-driven approach to machine condition prognosis using least square regression trees - University of Huddersfield Repository
Machine fault prognosis techniques have been considered profoundly in the recent time due to their profit for reducing unexpected faults or unscheduled maintenance. With those techniques, the working conditions of components, the trending of fault propagation, and the time-to-failure are forecasted precisely before they reach the failure thresholds. In this work, we propose an approach of Least Square Regression Tree (LSRT), which is an extension of the Classification and Regression Tree (CART), in association with one-step-ahead prediction of time-series forecasting technique to predict the future conditions of machines. In this technique, the number of available observations is firstly determined by using Caos method and LSRT is employed as prognosis system in the next step. The proposed approach is evaluated by real data of low methane compressor. Furthermore, the comparison between the predicted results ...
1,4-Benzoquinone之位向選擇性取代應用於抗癌試劑研發(2/3) - 臺北醫學大學
1,4-Benzoquinone 常見於的活性的結構分子中，亦被廣泛地運用在藥物結構修飾。 在化學反應上，1,4-benzoquinone 較常進行的是親核基取代反應，藉由這一類的反應能 導入不同的基團，經常能提升化合物的生物活性。然而，此類的親核基取代反應對於 取代在 C2或 C3位置，並無太大的選擇性。為了提高化學選擇性、清楚了解取代基位 置對於生物活性的影響，本計畫將以兩類具 1,4-benzoquinone結構的 quinoline-5,8-dione 及天然物 denbinobin 作為探討對象，利用離去基導向、溫度控制及路易士酸輔助等方 法，提高親核基取代反應的位向選擇性，合成一系列的 2-aroyl-quinoline-5,8-dione 及 denbinobin 衍生物，初步的實驗數據顯示 2-aroyl-quinoline-5,8-dione 及 denbinobin 衍生 物接具有良好的癌細胞生長抑制效果，因此本計畫將持續探討不同取代基對於活性的 影響，同時計畫合成各式 ...
Alfa Aesar™ 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone, 98+% 10g Alfa Aesar™ 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone, 98+%
Alfa Aesar™ 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone, 98+% 10g Alfa Aesar™ 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone, 98+% Dichlorotol to...
EWG Tap Water Database | Rapid Creek Ridge | Pentachlorophenol
EWGs Tap Water Database Pentachlorophenol results for Rapid Creek Ridge | Pentachlorophenol. Find out what is in your tap water
10.2 - Least squares regression line The regression standard error s for n sample data points is calculated from the res
View Notes - 10.2 from STAT 131 at Berkeley. Inferenceforregression Analysisofvarianceforregression Bivariatenormaldistribution Simplelinearregressionmodel Simplelinearregressionmodel Least squares
Data Least Squares Regression Calculation
For a set of data, the total variation or sum of squares for y is SST - 143.0 and the error sum of squares is SSE = 24.0. What proportion of the variation in y is explained by the regression equation? 2. A. Determine the.
1,4-BENZOQUINONE (D4, 98%) - Creative Proteomics
Creative-Proteomics offer cas 106-51-4 1,4-BENZOQUINONE (D4, 98%). We are specialized in manufacturing Stabel Isotope Labeled Analytical Standard products.
Antievolution.org - Antievolution.org Discussion Board -Topic::Peppered moth resting locations
4. students should know that the pictures were faked: This goes without saying. Since biologists have known since the 1980s that peppered moths do not normally rest on tree trunks, not to tell students that the pictures were staged (in many cases by gluing or pinning dead moths to desired backgrounds) constitutes as clear a case of scientific fraud as any on record. Yet Im aware of no sincere efforts by Darwinists to inform students of this -- despite their pious declarations of good intentions. Almost all recent (1998-2000) biology textbooks use such photos without any indication that they were staged. As a scientist, I find this absolutely inexcusable. If dogmatic Darwinists were as smart as they pretend to be, they would be actively campaigning -- for their own good! -- to rid textbooks of this fraud. Acquiescence in scientific misconduct will not look good on their resumes ...
Antievolution.org - Antievolution.org Discussion Board -Topic::Evolution of multiple-parts-required pathways
Pentachlorophenol (PCP) is a widely used and highly toxic wood preservative. It was first introduced as a pesticide in 1936 (7) and is not known to be a natural product. Despite its recent introduction into the environment and its high toxicity, several strains of Sphingobium chlorophenolicum (previously Sphingomonas chlorophenolica) (24) that can mineralize PCP have been identified. The best studied of these are strains ATCC 39723 (19), RA-2 (23), and UG30 (6). It appears that S. chlorophenolicum has assembled a new metabolic pathway capable of converting this anthropogenic compound into a recognizable metabolite. Our previous studies suggest that this pathway has been assembled by patching together enzymes from at least two different metabolic pathways (8). PCP hydroxylase (PCP monooxygenase; EC 126.96.36.199) and 2,6-dichlorohydroquinone dioxygenase may have originated from enzymes that hydroxylated a naturally occurring chlorinated phenol and then cleaved the resulting hydroquinone. ...
The electrochemistry of aqueous solutions of 4-methoxy-1,2-benzoquinone - Murdoch Research Repository
Using cyclic voltammetry, the electrochemistry of aqueous solutions of 4-methoxy-1,2-benzoquinone was investigated over the pH range 0-8. From the variation of half-wave potential with pH, it was inferred that the quinone was reduced to the hydroquinone; no acid-base reactions involving either the quinone or hydroquinone were observed. At low pH ( , 3), the cyclic voltammogram of the benzoquinone changed rapidly to a second pair of peaks at lower potentials. These were shown to be due to 2-hydroxy-1,4-benzoquinone, formed by hydrolysis of the original compound. The other hydrolysis product, methanol, was detected chromatographically. The hydrolysis reaction was shown to be first order both with respect to the 1,2-benzoquinone and protons. At pH 6 and above, 4-methoxy-1,2-benzoquinone showed a second type of decomposition whose rate was approximately first order in hydroxide ion. Using electrochemical and spectroscopic measurements, it was also demonstrated that 4-methoxy-1,2-benzoquinone was ...
1,4-benzoquinone | definition of 1,4-benzoquinone by Medical dictionary
Looking for online definition of 1,4-benzoquinone in the Medical Dictionary? 1,4-benzoquinone explanation free. What is 1,4-benzoquinone? Meaning of 1,4-benzoquinone medical term. What does 1,4-benzoquinone mean?
Sciencemadness Discussion Board - p-benzoquinone+acetone condensation - Powered by XMB 1.9.11
I found nothing on any possible reaction between acetone and p-benzoquinone with SciFinder. If there would be a reaction under basic conditions, I would guess that 5-hydroxy-2-methylbenzofurane would be the expected product. I would guess the reason why this apparently does not happen is because benzoquinone is unlikely to be stable toward the strong bases required for the enolization of acetone (such as hydroxides which can react with quinones themselves ...
E-mail a Wiley Online Library Link
Robert P. Hayes, Abigail R. Green, Mark S. Nissen, Kevin M. Lewis, Luying Xun and ChulHee Kang Structural characterization of 2,6-dichloro-p-hydroquinone 1,2-dioxygenase (PcpA) from Sphingobium chlorophenolicum, a new type of aromatic ring-cleavage enzyme Molecular Microbiology 88. Version of Record online: 26 MAR 2013 , DOI: 10.1111/mmi.12204. Complete the form below and we will send an e-mail message containing a link to the selected article on your behalf. Required = Required Field. ...
p-BENZOQUINONE - Manufacturer, Supplier & Exporter
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OLS Assumptions08B - Assumptions of Ordinary Least Squares Regression(Part 1 ESM 206 1 Assumptions of OLS regression 1 Model is...
View Notes - OLS_Assumptions08B from ESM 206 at University of California, Santa Barbara. Assumptions of Ordinary Least Squares Regression (Part 1) ESM 206 Jan 17, 2008 1 Assumptions of OLS
plsRglm: Partial Least Squares Regression for Generalized Linear Models version 1.2.5 from CRAN
Provides (weighted) Partial least squares Regression for generalized linear models and repeated k-fold cross-validation of such models using various criteria. It allows for missing data in the explanatory variables. Bootstrap confidence intervals constructions are also available.
1,4-Benzoquinone CAS#: 106-51-4
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Technical guidance on Pentachlorophenol (PCP)
Pentachlorophenol (PCP) is a group of polychlorinated compounds used as preservatives for wood, leather and textiles to shield against the attack of moulds, fungus and bacteria.
Pentachlorophenol Market to Penetrate Untapped Regions During 2018-2028
Pentachlorophenol is a chlorinated hydrocarbon fungicide and insecticide. It is primarily used to protect timber from wood boring insects and fungal rot.
Epirubicin Hydrochloride irreversible inhibition | Identification of genotype-correlated sensitivity to selective kinase...
Living cells rely upon the detection of chemical alerts because of their existence. sound dominates both for low- and high-chemoattractant concentrations. We also speculate which the interplay between exploration and exploitation can be used as a technique for accurate sensing of usually unmeasurable degrees of a chemoattractant. (known as measure chemical substance gradients straight by monitoring the distribution from the occupied chemoattractant receptors. These Epirubicin Hydrochloride irreversible inhibition cells can identify focus differences as low as a few per cent across their cell body [3C8] which is presently an open issue what exactly limitations this technique. Previously, the receptorCligand binding fluctuations had been recommended as the restricting factor, which continues to be a possibility just because a one thrilled receptor may amplify the indication by activating multiple G-proteins [9C11]. The chemotaxis signalling program serves as a the next Shannon communication route ...
Use of partial least squares regression to impute SNP genotypes in Italian Cattle breeds - omicX
BackgroundThe objective of the present study was to test the ability of the partial least squares regression technique to impute genotypes from low density single nucleotide polymorphisms (SNP) panels i.e. 3K or 7K to a high density panel with 50K SNP. No pedigree information was used.MethodsData consisted of 2093 Holstein, 749 Brown Swiss and 479 Simmental bulls genotyped with the Illumina 50K Beadchip. First, a single-breed approach was applied by using only data from Holstein animals. Then, to enlarge the training population, data from the three breeds were combined and a multi-breed analysis was performed. Accuracies of genotypes imputed using the partial least squares regression method were compared with those obtained by using the Beagle software. The impact of genotype imputation on breeding value prediction was evaluated for milk yield, fat content and protein content.ResultsIn the single-breed approach, the accuracy of imputation using partial least squares regression was around 90 and 94% for
Synthesis and antiviral evaluation of polyhalogenated imidazole nucleosides: Dimensional analogues of 2,5,6-trichloro-1-(β-D...
TY - JOUR. T1 - Synthesis and antiviral evaluation of polyhalogenated imidazole nucleosides. T2 - Dimensional analogues of 2,5,6-trichloro-1-(β-D-ribofuranosyl) benzimidazole. AU - Chien, Tun Cheng. AU - Saluja, Sunita S.. AU - Drach, John C.. AU - Townsend, Leroy B.. PY - 2004/11/4. Y1 - 2004/11/4. N2 - A series of polyhalogenated imidazole nucleosides were designed and synthesized as ring-contracted analogues of 2,5,6-trichloro-1-(β-D- ribofuranosyl)benzimidazole (TCRB) and its 2-bromo analogue (BDCRB) in an effort to explore the spatial limitation of the active pocket(s) in the target protein(s). 2,4,5-Trichloro-, 2-bromo-4,5-dichloro-, and 2,4,5-tribromoimidazole nucleosides were prepared by a condensation of the preformed heterocycles with the appropriate sugar precursors. The ribofuranosyl and xylofuranosyl analogues were prepared by a direct glycosylation using the Vorbruggens silylation method and provided exclusively the β-anomers. The arabinofuranosyl analogues were prepared by the ...
Pentachlorophenol in the UK environment. II. Human exposure and an assessment of pathways. - Lancaster EPrints
Pentachlorophenol (PCP) is present in most environmental compartments, including those which result in direct human exposure. This paper assesses the contribution made by different exposure routes and illustrates that the average non-occupationally exposed UK individual absorbs 0.05, 0.32 and 4.16 μg PCP per day from air inhalation, water and diet ingestion, giving a total absorption of 4.53 μg (total intake being 5.7 μg). Using data from other sources it appears that most human PCP body burdens are in the region of 550 μg. Using the body burden and calculated daily intakes it is concluded that either the half-life of PCP in the human body has been underestimated or that the UK body burden is below that found in other countries.. ...
A 2 Matrix Representation of Linear Least Squares - Regression Analysis
It is usually more convenient to base programs for nonlinear regression on matrix algebra. This is the approach taken in higher level mathematical programming software such as that provided by Matlab and Mathcad (sources for the Matlab and Mathcad software are listed at the end of this chapter). The principles are exactly the same as in the algebraic approach discussed above, but matrix methods facilitate organization and manipulation of the data.. In matrix notation, the straight-line model can be expressed as [3, 5]. where Y is a vector containing the n values of y; (meas), X is an n X 2 sample matrix, e is a vector containing the observed residuals, and b is the vector containing values of the slope and intercept. For an example with n = 3, eq. (2.17) can be represented as in Box 2.1.. ...
Pharmacokinetics and ecodisposition of polyhalogenated hydrocarbons: aspects and concepts - edoc
Pharmacokinetics and ecodisposition of polyhalogenated hydrocarbons: aspects and concepts. Drug Metabolism Reviews, 11 (2). pp. 149-190 ...
Sciencemadness Discussion Board - Benzoquinone situation - Powered by XMB 1.9.11
When I first tried this I bought a 30 % H2O2 under the name Baquacil and I tried the Erowid version of the synthesis and dripping the H2O2 with almost no fizzing in a two necked 500 ml rbf which only resulted in quinhydrone. Only until I boiled the reaction contents for a minute to a minute and a half while refluxing after I added the H2O2 wholesale did the hydroquinone go all the way to Benzoquinone after the boiling I would chill the rbf immediately in an icebath and then it would promptly go into the freezer for crystalization. Now I have returned to make more with the same gallon of H2O2 which I put in a refridgerator and I painted the walls when I added the H2O2 wholesale and tried to boil it the first time which prompted me to make a blast hood out of 2x4s and clear plastic. I took the Baquacil out of the fridge and let it sit for a day or two hoping the temp would raise and it would react like it did in the past and it seemed even more exothermic when I tried to add it wholesale somehow ...
This page includes the following topics and synonyms: Conenzyme Q10, Ubiquinone, CoQ, Vitamin Q10, 2,3 Dimethoxy-5-Methyl-6-Decaprenyl Benzoquinone.
Chloranil "Chloranilic acid". Sigma-Aldrich. Mostafa, S. I. (1999). "Complexes of 2,5-Dihydroxy-1,4-Benzoquinone and ...
The hydrolysis of HCP gives chloranil. S. Gali, C. Miravitlles and M. Font-Altaba "Hexachlorocyclohexa-2,5-dienone" Acta ...
Synthesis of DDQ involves cyanation of chloranil. Thiele and Günther first reported a 6-step preparation in 1906. The substance ...
Hydrochloric acid and potassium chlorate give chloranil. Potassium permanganate in neutral solution oxidizes it to nitrobenzene ...
The Molybdenum complex is activated with an oxidant such as chloranil. The result of the charge transfer facilitates ring ...
Chloranil 1,4-C6Cl4O2 is another potent oxidant and dehydrogenation agent. Monochloro-p-benzoquinone is yet another but milder ...
Pigment violet 23
It is prepared by condensation of chloranil and 3-amino-N-ethylcarbazole. It has a centrosymmetric angular structure. For many ... Pigment violet 23 is prepared by condensation of an aniline with chloranil. Chamberlain, Terence "Dioxazine violet pigments" ...
Hidden states of matter
"Photoinduced valence instability in the organic molecular compound tetrathiafulvalene-p-chloranil (TTF-CA)". Physical Review B ... "Photoinduced phase transition in tetrathiafulvalene-p-chloranil observed in femtosecond reflection spectroscopy". Physical ...
James B. Conant
I. The Use of the Chloranil Electrode in Glacial Acetic Acid and the Strength of Certain Weak Bases". Journal of the American ...
The dipyrromethane core is then oxidized to dipyrromethene using a quinone oxidant such as DDQ or p-chloranil. Alternatively, ...
Chloranil, a reagent in organic chemistry Lawsone, a dye present in the leaves of the henna plant Alizarin, a common red dye ... Strongly oxidizing quinones include chloranil and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (also known as DDQ). 9,10- ...
In the case at hand, heating acetate (1) with chloranil gives the conjugated dienone (2), and reaction of that compound with ... Chloranil (tetrachloroquinone) is the forerunner of dichlorodicyanoquinone (DDQ), a reagent used extensively for introducing ...
6-diene with chloranil (11). Acetylation under forcing conditions completes the synthesis of melengesterol acetate. ...
... as well as chloranil in a single reaction; the 4,6-diene, (medrogesterone), is obtained directly from this step. Medrogestone ...
... organic oxidation with P-chloranil in toluene 2 hours reflux and 81% yield c] Bishydroxylation with N-Methylmorpholine N-oxide ...
... followed by oxidation and ring closure with p-chloranil: Corrole has several important differences from porphyrin. The first is ...
... which is oxidized to dipyrromethene using a quinone oxidant such as DDQ or p-chloranil. Alternatively, dipyrromethenes are ...
... chloranil → VO(mes)3 VOCl3 + ZnPh2 → VOPhCl2 + "ZnPh(Cl)" Well-defined vanadium compounds do not appear as catalysts in any ...
... charge-transfer complexes of Ponceau S with p-chloranil, chloranilic and picric acids". Research on Chemical Intermediates. 41 ...
List of fungicides
... fungicides carbendazim carboxin carpropamid carvone Cheshunt mixture chinomethionat chlobenthiazone chloraniformethan chloranil ...
DMF Luche reduction to alcohol with sodium borohydride elimination reaction with Burgess reagent oxidation with p-chloranil ...
Like the parent benzoquinone, chloranil is a planar molecule that functions as a mild oxidant. Chloranil is produced by ... Chloranil is used to test for free secondary amines. This test is useful for checking for the presence of proline derivatives. ... Chloranil is a quinone with the molecular formula C6Cl4O2. Also known as tetrachloro-1,4-benzoquinone, it is a yellow solid. ... Chloranilic acid 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) Chloranil at Sigma-Aldrich J.-M. Lü, S. V. Rosokha, I. S. ...
Chloranil - Wikipedia
Like the parent benzoquinone, chloranil is a planar molecule that functions as a mild oxidant. Chloranil is produced by ... Chloranil is used to test for free secondary amines. This test is useful for checking for the presence of proline derivatives. ... Chloranil is a quinone with the molecular formula C6Cl4O2. Also known as tetrachloro-1,4-benzoquinone, it is a yellow solid. ... Chloranilic acid 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) Chloranil at Sigma-Aldrich J.-M. Lü, S. V. Rosokha, I. S. ...
Chloranil | 118-75-2
You can also browse global suppliers,vendor,prices,Price,manufacturers of Chloranil(118-75-2). At last,Chloranil(118-75-2) ... Visit ChemicalBook To find more Chloranil(118-75-2) information like chemical properties,Structure,melting point,boiling point, ... Chloranil Spectrum. Chloranil(118-75-2) MSChloranil(118-75-2) IR1Chloranil(118-75-2) IR2 ... Chloranil is sensitive to excessive light and heat. Chloranil is incompatible with strong oxidizing agents. Chloranil reacts ...
Sciencemadness Discussion Board - What exactl is ortho-chloranil? - Powered by XMB 1.9.11
Chloranil. Dont know what are you goung to use it for, but DDQ is a substitute in many processes. ... What exactl is ortho-chloranil?. I can already see the posts instructing me to google it so dont bother, I already have, and ... What Im hoping for here is a general discription of ortho-chloranil, and if possible, any information relating to its purchase ... This patent gives a continuous lab-scale process for making o-chloranil from tetrachlorocatechol via chlorination of catechol ...
Chloranil | Article about chloranil by The Free Dictionary
Find out information about chloranil. C6Cl4O2 Yellow leaflets melting at 290°C; soluble in organic solvents; made from phenol ... by treatment with potassium chloride and hydrochloric acid; used as... Explanation of chloranil ... chloranil. Also found in: Dictionary, Wikipedia.. Related to chloranil: chloranilic acid, DDQ chloranil. [klȯr′an·əl] (organic ... Chloranil , Article about chloranil by The Free Dictionary https://encyclopedia2.thefreedictionary.com/chloranil ...
NOPR: Charge-transfer transition energies of EDA complexes between <i style="mso-bidi-font-style:normal">o</i>-chloranil and a...
The ground state geometries of electron donor-acceptor (EDA) complexes between o-chloranil and a series of phenols have been ... Charge-transfer transition energies of EDA complexes between o-chloranil and a series of phenols: A correction with AMI results ... chloranil from the phenol moiety; the theoretical transition energies, after correction for salvation, have been found to agree ...
Chloranil Application China Manufacturers & Suppliers & Factory
We are Professional Manufacturer of Chloranil Application company, Factory & Exporters specialize in Chloranil Application wiht ... Chloranil Application - manufacturer, factory, supplier from China. (Total 1 Products for Chloranil Application) ... This Chloranil Application is incredible. And I really appreciated the fast response of the service. ... I really like the Chloranil Application . When I received this product, it was completely packaged and included with detailed ...
Chloranil - Manufacturers, Suppliers, Exporters, Importers in India
Chloranil suppliers, Chloranil exporters, Chloranil importers. Get contact address of Chloranil manufacturing and supplying ... Manufacturer of Chloranil (2,3,5,6-Tetra Chloro-1,4-Benzo Quinone) (99%), BDSA (4,4-Diamino Diphenyl-2,2-Disulphonic Acid ... Exporter of Dyes Intermediates : Alpha Naphthol, Anthranilic Acid, Beta Naphthol Intermediates, Benzyl Chloride, Chloranil, H ... Dealing in Acrylamide, Aniline Oil, Carbazole, Chloranil, Diethyl Malonate. Epichlorohydrin, Ethyl Cyano Acetate, Ethyl 2- ...
CISDOC - Supplementary reports XI (Nos. 2,11a,11b,13,83,85)
Patent US4377646 - Process for the production of foamed poly(epoxy-polyisocyanate)silicate polymers - Google Patents
IUCr) Acta Crystallographica Volume 8, Part 12, December 1955
Chlorflurenol- CAS Number 2464-37-1
Chlorthion- CAS Number 500-28-7
Use of Phosphated Alcanols as Dispersants, Emulsifiers, Hydrotropes, Wetting Agents and Compatability Agents in Agricultural...
Photoinduced neutral-to-ionic phase transition in tetrathiafulvalene-p- chloranil studied by time-resolved vibrational...
We studied the photoinduced neutral-to-ionic phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) using time-resolved ... Fingerprint Dive into the research topics of Photoinduced neutral-to-ionic phase transition in tetrathiafulvalene-p- chloranil ... N2 - We studied the photoinduced neutral-to-ionic phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) using time- ... AB - We studied the photoinduced neutral-to-ionic phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) using time- ...
Aniline - Wikipedia
ChemIDplus - 118-75-2 - UGNWTBMOAKPKBL-UHFFFAOYSA-N - Chloranil - Similar structures search, synonyms, formulas, resource links...
Chloranilic acid - Wikipedia
Patent US5883246 - Synthesis of polypyrrolic macrocycles from meso-substituted tripyrrane compounds - Google Patents
with p-chloranil to Engl., 33:12, 1246- give a benzene- 47 at 1246. containing macrocycle called "benziporphin."1994 Performed ... Following this, 100 mg of p-chloranil (4.0 10-4) was added, and the reaction mixture was refluxed for 20 minutes. The solution ... Examples of such useful oxidizing agents include dichloro-dicyanobenzoquinone ("DDQ"), o- and p-chloranil, O2 gas, iodine (I2) ... are selected from the group consisting of DDQ or p-chloranil in dichloromethane or toluene, or O2 gas bubbled through an ...
Tetrachloro-p-benzoquinone - Substance Information - ECHA
A Short History of Fungicides
The EPA National Library Catalog | EPA National Library Network | US EPA
Human Health Risk Assessment Products and Publications | Risk Assessment Portal | US EPA
75-07-0 - Acetaldehyde, 99% - 33244 - Alfa Aesar
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BJOC - Multicomponent reactions II
EUR-Lex - 32006D0507 - EN - EUR-Lex
Cyclising - definition of cyclising by The Free Dictionary
Solution Synthesis of Atomically Precise Graphene Nanoribbons : Physical Sciences Reviews
Sciencemadness Discussion Board - 2,3,5,6-Tetraazidobenzoquinone - Powered by XMB 1.9.11
2g of chloranil was stirred into a solution of 5g of sodium nitrite in 200ml of water. Gradually all the chloranil went into ... Chloranil can also be used to prepare nitranilic acid.. Chloranil according to ber, 20, 2027-2031 (1887) when treated with an ... chloranil is very frequently formed ; and as chloranil itself breaks up into chloropicrin by the action of aqua regia, this is ... Chloranil : A slurry of 5.0 grams of salicylic acid and 100 ml of concentrated hydrochloric acid was heated to 80ºC and 5.0 ...
Functional polymer with supported pressure-sensitive luminophore, and pressure-sensitive paint and pressure-sensitive element...
- Chloranilic acid 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) Chloranil at Sigma-Aldrich J.-M. Lü, S. V. Rosokha, I. S. Neretin and J. K. Kochi, "Quinones as Electron Acceptors. (wikipedia.org)
- Crystallise p-chloranil from acetic acid, acetone, *benzene, EtOH or toluene, dry it in a vacuum over P2O5, or from acetic acid and drying over NaOH in a vacuum desiccator. (chemicalbook.com)
- When reacted with chlorine, aqua regia or potassium chlorate in the presence of hydrochloric acid, picric acid yields chloranil along with chloropicrin. (sciencemadness.org)
- If not p-DCB then nitration to activate one of the chlorines then remove with NaOH giving mainly 4-chloro-2,6-dinitrophenol, its known that picric acid and p-chlorophenol can be oxidised/chlorinated to chloranil so that probably has merit if p-DCB itself is unreactive. (sciencemadness.org)
- chloranil acid (CLA) (purity ≥ 98%) was obtained from Alfa Aesar and chloroform, ethanol, methanol and acetonitrile from Fisher were used without further purification. (scirp.org)
- We studied the photoinduced neutral-to-ionic phase transition in tetrathiafulvalene-p-chloranil (TTF-CA) using time-resolved infrared (IR) vibrational spectroscopy with a broadband femtosecond IR laser pulse and a linear IR detector array. (elsevier.com)
- Infrared spectra of acridine orange and its charge transfer complexes with acceptors such as chloranil, 2,3-dichloro-5,6-dicyano- p -benzoquinone, 7,7,8,8-tetracyano- p -quinodimethane and tetracyano- p -ethylene are reported. (niscair.res.in)
- Prepd (chloranil) from p- phenylenediamine or phenol by treating with KClO3 and HCl. (sciencemadness.org)
- Chloranil is used to test for free secondary amines. (wikipedia.org)
- Secondary amines react with chloranil to give a brown/red/orange derivative, the colour depending on the amine. (wikipedia.org)
- A method for the detection of aromatic amines on the solid support by using chloranil has been developed. (elsevier.com)
- The ground state geometries of electron donor-acceptor (EDA) complexes between o -chloranil and a series of phenols have been optimised by AMI method, adopting a 'super molecule' model for each DA adduct. (niscair.res.in)
- T. Christensen, "Qualitative test for monitoring coupling completeness in solid phase peptide synthesis using chloranil," Acta Chemica Scandinavica , vol. 33, pp. 763-776, 1979. (hindawi.com)
- The effect of several factors on the rate of ketone regeneration were investigated, among them were light intensity, solvent, initial concentrations of tosylhydrazone and chloranil and secondary reaction products. (concordia.ca)
- doi:10.1002/14356007.a07_001.pub2 Derek R. Buckle "Chloranil" in Encyclopedia of Reagents for Organic Synthesis, 2001, John Wiley. (wikipedia.org)
- we have Chloranil tech grade and pharma grade CAS No 118-75-2 Molecular Formula C6Cl4O2 Molecular Weight 245.88 Appearance Yellow powder or cr. (kitairu.net)
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- Recently chloranil was employed as cyclising agent for the synthesis of dissymmetric TPDOs, however, the product was obtained indirectly through bisphenoxy or phenoxazine tricyclic intermediate [14, 15] instead of dianilide intermediate. (thefreedictionary.com)
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- Five source profiles were extracted from the PMF model applied to the sediment samples including chloranil, combustion, polychlorinated biphenyl impurities, mixed urban sources and. (environmental-expert.com)