Benzoic acid or benzoic acid esters substituted with one or more chlorine atoms.
An enzyme that catalyzes the oxidation of catechol to muconic acid with the use of Fe3+ as a cofactor. This enzyme was formerly characterized as EC 1.13.1.1 and EC 1.99.2.2.
Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.
A group of 1,2-benzenediols that contain the general formula R-C6H5O2.
Derivatives of BENZOIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain the carboxybenzene structure.
Industrial products consisting of a mixture of chlorinated biphenyl congeners and isomers. These compounds are highly lipophilic and tend to accumulate in fat stores of animals. Many of these compounds are considered toxic and potential environmental pollutants.
Oxidases that specifically introduce DIOXYGEN-derived oxygen atoms into a variety of organic molecules.
Non-heme iron-containing enzymes that incorporate two atoms of OXYGEN into the substrate. They are important in biosynthesis of FLAVONOIDS; GIBBERELLINS; and HYOSCYAMINE; and for degradation of AROMATIC HYDROCARBONS.
The continent lying around the South Pole and the southern waters of the Atlantic, Pacific, and Indian Oceans. It includes the Falkland Islands Dependencies. (From Webster's New Geographical Dictionary, 1988, p55)
Complex petroleum hydrocarbons consisting mainly of residues from crude oil distillation. These liquid products include heating oils, stove oils, and furnace oils and are burned to generate energy.
The presence of bacteria, viruses, and fungi in the soil. This term is not restricted to pathogenic organisms.
A major group of unsaturated cyclic hydrocarbons containing two or more rings. The vast number of compounds of this important group, derived chiefly from petroleum and coal tar, are rather highly reactive and chemically versatile. The name is due to the strong and not unpleasant odor characteristic of most substances of this nature. (From Hawley's Condensed Chemical Dictionary, 12th ed, p96)
The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.
A genus of gram-negative, aerobic, rod-shaped bacteria characterized by an outer membrane that contains glycosphingolipids but lacks lipopolysaccharide. They have the ability to degrade a broad range of substituted aromatic compounds.
Environments or habitats at the interface between truly terrestrial ecosystems and truly aquatic systems making them different from each yet highly dependent on both. Adaptations to low soil oxygen characterize many wetland species.
The immediate physical zone surrounding plant roots that include the plant roots. It is an area of intense and complex biological activity involving plants, microorganisms, other soil organisms, and the soil.
A group of condensed ring hydrocarbons.
Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.
Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.
Compounds with two peroxide groups, that is, two pairs of adjacent OXYGEN atoms. They may have activity against PLASMODIUM similar to the ARTEMISININS.
Substances produced from the reaction between acids and bases; compounds consisting of a metal (positive) and nonmetal (negative) radical. (Grant & Hackh's Chemical Dictionary, 5th ed)
The measurement of various aspects of MAGNETIC FIELDS.
Exclusive legal rights or privileges applied to inventions, plants, etc.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Presence of small calculi in the terminal salivary ducts (salivary sand), or stones (larger calculi) found in the larger ducts.
A group of compounds that are derivatives of beta- aminoethylbenzene which is structurally and pharmacologically related to amphetamine. (From Merck Index, 11th ed)
An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.
A technique of operations research for solving certain kinds of problems involving many variables where a best value or set of best values is to be found. It is most likely to be feasible when the quantity to be optimized, sometimes called the objective function, can be stated as a mathematical expression in terms of the various activities within the system, and when this expression is simply proportional to the measure of the activities, i.e., is linear, and when all the restrictions are also linear. It is different from computer programming, although problems using linear programming techniques may be programmed on a computer.
A plant genus of the family RANUNCULACEAE that contains alpha-hederin, a triterpene saponin in the seeds, and is the source of black seed oil.
The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups.
The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.
Compounds that interact with ESTROGEN RECEPTORS in target tissues to bring about the effects similar to those of ESTRADIOL. Estrogens stimulate the female reproductive organs, and the development of secondary female SEX CHARACTERISTICS. Estrogenic chemicals include natural, synthetic, steroidal, or non-steroidal compounds.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
A mobile, very volatile, highly flammable liquid used as an inhalation anesthetic and as a solvent for waxes, fats, oils, perfumes, alkaloids, and gums. It is mildly irritating to skin and mucous membranes.
One of the ESTROGEN RECEPTORS that has marked affinity for ESTRADIOL. Its expression and function differs from, and in some ways opposes, ESTROGEN RECEPTOR BETA.
Cytoplasmic proteins that bind estrogens and migrate to the nucleus where they regulate DNA transcription. Evaluation of the state of estrogen receptors in breast cancer patients has become clinically important.
Cytoplasmic proteins that bind certain aryl hydrocarbons, translocate to the nucleus, and activate transcription of particular DNA segments. AH receptors are identified by their high-affinity binding to several carcinogenic or teratogenic environmental chemicals including polycyclic aromatic hydrocarbons found in cigarette smoke and smog, heterocyclic amines found in cooked foods, and halogenated hydrocarbons including dioxins and polychlorinated biphenyls. No endogenous ligand has been identified, but an unknown natural messenger with a role in cell differentiation and development is suspected.
Purine or pyrimidine bases attached to a ribose or deoxyribose. (From King & Stansfield, A Dictionary of Genetics, 4th ed)
A novel composition, device, or process, independently conceived de novo or derived from a pre-existing model.
Property, such as patents, trademarks, and copyright, that results from creative effort. The Patent and Copyright Clause (Art. 1, Sec. 8, cl. 8) of the United States Constitution provides for promoting the progress of science and useful arts by securing for limited times to authors and inventors, the exclusive right to their respective writings and discoveries. (From Black's Law Dictionary, 5th ed, p1014)
Purines with a RIBOSE attached that can be phosphorylated to PURINE NUCLEOTIDES.
Pyrimidines with a RIBOSE attached that can be phosphorylated to PYRIMIDINE NUCLEOTIDES.
Proteins involved in the transport of NUCLEOSIDES across cellular membranes.
The study of microorganisms such as fungi, bacteria, algae, archaea, and viruses.
Private, not-for-profit hospitals that are autonomous, self-established, and self-supported.
Hospitals owned and operated by a corporation or an individual that operate on a for-profit basis, also referred to as investor-owned hospitals.
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.
Health care institutions operated by private groups or corporations for a profit.
The evaluation by experts of the quality and pertinence of research or research proposals of other experts in the same field. Peer review is used by editors in deciding which submissions warrant publication, by granting agencies to determine which proposals should be funded, and by academic institutions in tenure decisions.

Intestinal prokinesia by two esters of 4-amino-5-chloro-2- methoxybenzoic acid: involvement of 5-hydroxytryptamine-4 receptors and dissociation from cardiac effects in vivo. (1/180)

In five fasting, conscious dogs, we compared the prokinetic action of two selective 5-hydroxytryptamine-4 (5-HT4) receptor agonists with low affinity for 5-HT3 receptors ML10302 (2-piperidinoethyl 4-amino-5-chloro-2-methoxybenzoate) and SR59768 (2-[(3S)-3-hydroxypiperidino]ethyl 4-amino-5-chloro-2-methoxybenzoate) in the duodenum and jejunum, using cisapride as a reference compound. Heart rate and rate-corrected QT (QTc) also were monitored to assess whether or not the cardiac effects of cisapride are shared by other 5-HT4 receptor agonists. Both ML10302 and SR59768 dose-dependently stimulated spike activity in the duodenum with similar potencies (dose range, 3-300 nmol/kg i.v.; ED50 values: 24 and 23 nmol/kg i.v., respectively), mimicking the effect of cisapride (30-3000 nmol/kg i.v.). The maximal effect was achieved with the dose of 100 nmol/kg i.v. for both compounds. Similar findings were obtained in the jejunum. Atropine and GR125487 (1-[2-[(methylsulfonyl)amino]ethyl]-4-piperidinyl-methyl 5-fluoro-2-methoxy-1H-indole-3-carboxylate, selective 5-HT4 receptor antagonist), at doses having no effect per se, antagonized intestinal prokinesia by maximal doses of ML10302 and SR59768. Neither ML10302 nor SR59768 had any effect on heart rate or QTc at any of the doses tested, whereas cisapride, at the highest dose (3000 nmol/kg), induced tachycardia and lengthened the QTC (p <.01). In conclusion, ML10302 and SR59768 share with cisapride a similar prokinetic action in the canine duodenum and jejunum in vivo. This effect is mediated by pathways involving activation of 5-HT4 and muscarinic receptors. Unlike cisapride, which induces tachycardia and prolongs the QTc by a mechanism probably unrelated to 5-HT4 receptor activation, ML10302 and SR59768 are devoid of cardiac effects in this model.  (+info)

Selection of clc, cba, and fcb chlorobenzoate-catabolic genotypes from groundwater and surface waters adjacent to the Hyde park, Niagara Falls, chemical landfill. (2/180)

The frequency of isolation of three nonhomologous chlorobenzoate catabolic genotypes (clc, cba, and fcb) was determined for 464 isolates from freshwater sediments and groundwater in the vicinity of the Hyde Park industrial landfill site in the Niagara watershed. Samples were collected from both contaminated and noncontaminated sites during spring, summer, and fall and enriched at 4, 22, or 32 degrees C with micromolar to millimolar concentrations of chlorobenzoates and 3-chlorobiphenyl (M. C. Peel and R. C. Wyndham, Microb. Ecol: 33:59-68, 1997). Hybridization at moderate stringency to restriction-digested genomic DNA with DNA probes revealed the chlorocatechol 1,2-dioxygenase operon (clcABD), the 3-chlorobenzoate 3,4-(4,5)-dioxygenase operon (cbaABC), and the 4-chlorobenzoate dehalogenase (fcbB) gene in isolates enriched from all contaminated sites in the vicinity of the industrial landfill. Nevertheless, the known genes were found in less than 10% of the isolates from the contaminated sites, indicating a high level of genetic diversity in the microbial community. The known genotypes were not enriched from the noncontaminated control sites nearby. The clc, cba, and fcb isolates were distributed across five phenotypically distinct groups based on Biolog carbon source utilization, with the breadth of the host range decreasing in the order clc > cba > fcb. Restriction fragment length polymorphism (RFLP) patterns showed that the cba genes were conserved in all isolates whereas the clc and fcb genes exhibited variation in RFLP patterns. These observations are consistent with the recent spread of the cba genes by horizontal transfer as part of transposon Tn5271 in response to contaminant exposure at Hyde Park. Consistent with this hypothesis, IS1071, the flanking element in Tn5271, was found in all isolates that carried the cba genes. Interestingly, IS1071 was also found in a high proportion of isolates from Hyde Park carrying the clc and fcb genes, as well as in type strains carrying the clcABD operon and the biphenyl (bph) catabolic genes.  (+info)

Cloning, expression, and nucleotide sequence of the Pseudomonas aeruginosa 142 ohb genes coding for oxygenolytic ortho dehalogenation of halobenzoates. (3/180)

We have cloned and characterized novel oxygenolytic ortho-dehalogenation (ohb) genes from 2-chlorobenzoate (2-CBA)- and 2,4-dichlorobenzoate (2,4-dCBA)-degrading Pseudomonas aeruginosa 142. Among 3,700 Escherichia coli recombinants, two clones, DH5alphaF'(pOD22) and DH5alphaF'(pOD33), converted 2-CBA to catechol and 2,4-dCBA and 2,5-dCBA to 4-chlorocatechol. A subclone of pOD33, plasmid pE43, containing the 3,687-bp minimized ohb DNA region conferred to P. putida PB2440 the ability to grow on 2-CBA as a sole carbon source. Strain PB2440(pE43) also oxidized but did not grow on 2,4-dCBA, 2,5-dCBA, or 2,6-dCBA. Terminal oxidoreductase ISPOHB structural genes ohbA and ohbB, which encode polypeptides with molecular masses of 20,253 Da (beta-ISP) and 48,243 Da (alpha-ISP), respectively, were identified; these proteins are in accord with the 22- and 48-kDa (as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis) polypeptides synthesized in E. coli and P. aeruginosa parental strain 142. The ortho-halobenzoate 1,2-dioxygenase activity was manifested in the absence of ferredoxin and reductase genes, suggesting that the ISPOHB utilized electron transfer components provided by the heterologous hosts. ISPOHB formed a new phylogenetic cluster that includes aromatic oxygenases featuring atypical structural-functional organization and is distant from the other members of the family of primary aromatic oxygenases. A putative IclR-type regulatory gene (ohbR) was located upstream of the ohbAB genes. An open reading frame (ohbC) of unknown function that overlaps lengthwise with ohbB but is transcribed in the opposite direction was found. The ohbC gene codes for a 48,969-Da polypeptide, in accord with the 49-kDa protein detected in E. coli. The ohb genes are flanked by an IS1396-like sequence containing a putative gene for a 39,715-Da transposase A (tnpA) at positions 4731 to 5747 and a putative gene for a 45,247-Da DNA topoisomerase I/III (top) at positions 346 to 1563. The ohb DNA region is bordered by 14-bp imperfect inverted repeats at positions 56 to 69 and 5984 to 5997.  (+info)

Construction and characterization of two recombinant bacteria that grow on ortho- and para-substituted chlorobiphenyls. (4/180)

Cloning and expression of the aromatic ring dehalogenation genes in biphenyl-growing, polychlorinated biphenyl (PCB)-cometabolizing Comamonas testosteroni VP44 resulted in recombinant pathways allowing growth on ortho- and para-chlorobiphenyls (CBs) as a sole carbon source. The recombinant variants were constructed by transformation of strain VP44 with plasmids carrying specific genes for dehalogenation of chlorobenzoates (CBAs). Plasmid pE43 carries the Pseudomonas aeruginosa 142 ohb genes coding for the terminal oxygenase (ISPOHB) of the ortho-halobenzoate 1,2-dioxygenase, whereas plasmid pPC3 contains the Arthrobacter globiformis KZT1 fcb genes, which catalyze the hydrolytic para-dechlorination of 4-CBA. The parental strain, VP44, grew only on low concentrations of 2- and 4-CB by using the products from the fission of the nonchlorinated ring of the CBs (pentadiene) and accumulated stoichiometric amounts of the corresponding CBAs. The recombinant strains VP44(pPC3) and VP44(pE43) grew on, and completely dechlorinated high concentrations (up to 10 mM), of 4-CBA and 4-CB and 2-CBA and 2-CB, respectively. Cell protein yield corresponded to complete oxidation of both biphenyl rings, thus confirming mineralization of the CBs. Hence, the use of CBA dehalogenase genes appears to be an effective strategy for construction of organisms that will grow on at least some congeners important for remediation of PCBs.  (+info)

Cloning and sequencing of the fcbB gene encoding 4-chlorobenzoate-coenzyme A dehalogenase from Pseudomonas sp. DJ-12. (5/180)

Pseudomonas sp. DJ-12 degrades 4-chlorobenzoate through hydrolytic dechlorination to produce 4-hydroxybenzoate and a chloride ion. The fcbB gene encoding the 4-chlorobenzoate-coenzyme A (4CBA-CoA) dehalogenase which catalyzes the nucleophilic substitution reaction to convert 4CBA-CoA to 4-hydroxybenzoate-coenzyme A (4HBA-CoA) in the consecutive steps of dechlorination was cloned from the chromosome of the organism. A nucleotide sequence analysis of the gene showed an open reading frame consisting of 810 nucleotides, which can encode for a polypeptide of molecular mass 30 kDa, containing 269 amino acid residues. A promoter-like sequence (-35 and -10 region) and a putative ribosome-binding sequence were identified. A deduced amino acid sequence of the 4CBA-CoA dehalogenase showed 86%, 50%, and 50% identity with those of corresponding enzymes in the Pseudomonas sp. CBS3, Arthrobacter sp. SU, and Arthrobacter sp. TM1, respectively.  (+info)

Membrane tubule-mediated reassembly and maintenance of the Golgi complex is disrupted by phospholipase A2 antagonists. (6/180)

Although membrane tubules can be found extending from, and associated with, the Golgi complex of eukaryotic cells, their physiological function has remained unclear. To gain insight into the biological significance of membrane tubules, we have developed methods for selectively preventing their formation. We show here that a broad range of phospholipase A2 (PLA2) antagonists not only arrest membrane tubule-mediated events that occur late in the assembly of the Golgi complex but also perturb its normal steady-state tubulovesicular architecture by inducing a reversible fragmentation into separate "mini-stacks." In addition, we show that these same compounds prevent the formation of membrane tubules from Golgi stacks in an in vitro reconstitution system. This in vitro assay was further used to demonstrate that the relevant PLA2 activity originates from the cytoplasm. Taken together, these results demonstrate that Golgi membrane tubules, sensitive to potent and selective PLA2 antagonists, mediate both late events in the reassembly of the Golgi complex and the dynamic maintenance of its steady-state architecture. In addition, they implicate a role for cytoplasmic PLA2 enzymes in mediating these membrane trafficking events.  (+info)

Regiospecificity of dioxygenation of di- to pentachlorobiphenyls and their degradation to chlorobenzoates by the bph-encoded catabolic pathway of Burkholderia sp. strain LB400. (7/180)

Burkholderia sp. strain LB400 is one of the most potent aerobic polychlorobiphenyl (PCB)-degrading microorganisms that have been characterized. Its PCB-dioxygenating activity originates predominantly or exclusively from the biphenyl dioxygenase encoded by its bph gene cluster. Analysis of the dioxygenation products of several di- to pentachlorinated biphenyls formed by this enzyme revealed a complex dependence of the regiospecificity and the yield of dioxygenation on the substitution patterns of both the oxidized and the nonoxidized rings. No dioxygenolytic attack involving chlorinated meta or para carbons was observed. Therefore, the ability of the enzyme to hydroxylate chlorinated carbons appears to be limited to the ortho position. However, it is not limited to monochlorinated rings, as evidenced by dioxygenation of the 2, 4-disubstituted ring at carbons 2 and 3. This site of attack is strikingly different from that of the 2,5-dichlorinated ring, which has been shown to be dihydroxylated at positions 3 and 4 (J. D. Haddock, J. R. Horton, and D. T. Gibson, J. Bacteriol. 177:20-26, 1995). These results demonstrate that a second substituent of ortho-chlorinated rings crucially influences the site of dioxygenation at this ring and thereby determines whether or not the initial chlorobiphenyl oxidation product is further metabolized through the bph-encoded pathway. The 2,4-dichlorinated ring can alternatively be attacked at carbons 5 and 6. The preferred site crucially depends on the substitution pattern of the other ring. The formation of more than a single dioxygenation product was found predominantly with congeners that contain two chlorinated rings, both of which are similarly prone to dioxygenation or one is substituted only at carbon 3.  (+info)

The p53 tumor suppressor protein reduces point mutation frequency of a shuttle vector modified by the chemical mutagens (+/-)7, 8-dihydroxy-9,10-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene, aflatoxin B1 and meta-chloroperoxybenzoic acid. (8/180)

p53 has been postulated to be the guardian of the genome. However, results supporting the prediction that point mutation frequencies are elevated in p53-deficient cells either have not been forthcoming or have been equivocal. To analyse the effect of p53 on point mutation frequency, we used the supF gene of the pYZ289 shuttle vector as a mutagenic target. pYZ289 was treated in vitro by ultraviolet irradiation, aflatoxin B1, (+/-)7,8-dihydroxy-9, 10-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene and meta-chloroperoxybenzoic acid and then transfected into p53-deficient cells with or without a p53 expression vector. p53 reduced the mutant frequency up to fivefold when pYZ289 was treated with aflatoxin B1, (+/-)7,8-dihydroxy-9,10-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene or meta-chloroperoxybenzoic acid but not when it was ultraviolet-irradiated. The p53-dependent mutation frequency reduction was higher at a higher level of premutational lesions for aflatoxin B1 and (+/-)7,8-dihydroxy-9,10-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene and at a lower level of lesions for meta-chloroperoxybenzoic acid. This suggests that the chemical mutagens produce, in a dose-dependent fashion, two kinds of DNA damage, one subject to p53-dependent mutation frequency reduction and the other not. These results indicate that p53 can reduce the point mutation frequency in a shuttle vector treated by chemical mutagens and suggest that p53 can act as guardian of the genome for at least some kinds of point mutations.  (+info)

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2-Methoxy-4-amino-5-chlorobenzoic acid 2-[4-(4-chlorophenyl)piperazino]ethyl ester | C20H23Cl2N3O3 | CID 10717193 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
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2-Amino-3-chlorobenzoic acid | C7H6ClNO2 | CID 80807 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
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The first high-valent iron oxo complex on the phthalocyanine platform has been prepared from iron tetra-tert-butyl-phthalocyanine and m-chloroperbenzoic acid and characterized by low temperature UV-vis, cryospray MS, EPR, X-ray absorption and high resolution X-ray emission methods. Porphyrins & Phthalocyanines
130 mg (0.09 mmol, 1 eq) of (12) are dissolved in 880 ^1 of anhydrous CH2C12. 20 mg (0.27 mmol, 3 eq) of 1H-tetrazole are then added, followed by 52 jil (0.17 mmol, 2 eq) of (A110) 2PN(iPr)2. After stirring for 4 h at ambient temperature, the reaction mixture is cooled to -60°C, 44 mg (0.17 mmol, 2 eq) of m-chloroperbenzoic acid are added, and the stirring is continued for 30 min at -60°C, 15 min at 0°C, and 45 min at ambient temperature. 0.5 ml of a 10% Na2S205 solution are added, at 0°C, to the reaction medium in order to destroy the excess oxidant, and then extraction is carried out with dichloromethane. The organic phase is washed with a 10% Na2S205 solution and the dichloromethane is then evaporated off under reduced vacuum. The residue is taken up in methyl tert-butyl ether and this organic phase is extracted with a 6% citric acid solution and a saturated NaCl solution, dried over anhydrous Na2S04 and filtered, and the solvent is evaporated off under reduced vacuum. The crude product ...
General Characteristics The oxidation of olefins to epoxides using peracids is known as the Prilezhaev epoxidation. m-Chloroperoxybenzoic acid (mCPBA) in particular is used often in laboratories .... ...
Ajith Kumar, P. V. and Kunhi, A. A. M. (2000) Pathways for 3-chloro- and 4-chlorobenzoate degradation in Pseudomonas aeruginosa 3mT. Biodegradation, 11 (4). pp. 247-61. ISSN 0923-9820 Ajith Kumar, P. V. and Gangadhara, K. P. and Manilal, P. and Kunhi, A. A. M. (1999) Soil Inoculation with Pseudomonas Aeruginosa 3MT Eliminates the Inhibitory Effect of 3- Chloro- and 4-Chlorobenzoate on Tomato Seed Germination. Soil Biology and Biochemistry, 30 (8/9). pp. 1053-1059. Babu, K. S. and Ajith Kumar, P. V. and Kunhi, A. A. M. (1995) Mineralisation of phenol and its derivatives by Pseudomonas sp. strain CP4. World Journal of Microbiology and Biotechnology, 11 (6). pp. 661-664. Babu, K. S. and Ajith Kumar, P. V. and Kunhi, A. A. M. (1995) Simultaneous degradation of 3-chlorobenzoate and phenolic compounds by a defined mixed culture of Pseudomonas sp. World Journal of Microbiology and Biotechnology, 11 (2). pp. 148-152. ...
60g Piperonal was dissolved in 500ml DCM, and 90g MCPBA (m-Chloroperoxybenzoic acid) was added in portions, and the mixture stirred for 18h. The precipitate was filtered off and washed with DCM. The combined filtrates was then washed with cold saturated Na2CO3 solution, followed by H2O, dried over MgSO4 and evaporated to dryness. The resulting formate ester was dissolved in 250ml methanol and mixed with a solution of 30g KOH in 200ml methanol. The reaction mixture was stirred at room temp for 15h, evaporated to dryness, the residue dissolvd in 300ml water, neutralized with 6M HCl and extracted with ethyl acetate. The organic layer was washed with NaHCO3 followed by water, dried over MgSO4 and evaporated to dryness. The crude product (57g) was recrystallized from hexane to give colorless crystals of Sesamol (48g), mp 54-55 C.. 3,4-Methylenedioxyanisole. ...
Novel haloaromatic etheramines have been synthesized from halogenated benzene and polyphenyls and alkali metal salts of phenol-formaldehyde-anilineresins. The resultant etheramines are epoxy curing agents and intermediates for the preparation of thermosetting imides.
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 ...
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 ...
In nature a significant part of the microbial activity is concentrated at or near oxic/anoxic interfaces, where oxygen concentrations are often low. Bacteria possessing different kinetic characteristics for oxygen and employing distinct metabolic pathways for the degradation of (halo)aromatic substrates for which oxygen is needed as co-substrate may have to compete with each other in such environments. In this study the competitiveness of Pseudomonas sp. strain A3 relative to Alcaligenes sp. strain L6 was tested in batch and in continuous cultures. While both of these strains are able to metabolise 3-chlorobenzoate (3CBA), the former was isolated under air saturating conditions and employs the catechol pathway, whereas the latter was isolated under reduced partial pressures of oxygen and was capable of metabolising 3CBA via the gentisate pathway. Competition experiments in batch culture resulted in pure cultures of Pseudomonas sp. strain A3 under air saturating conditions. However, if reduced ...
The cis-diol dehydrogenase cbaC gene of Tn5271 is required for growth on 3-chlorobenzoate but not 3,4-dichlorobenzoate.: The nucleotide sequence of cbaC, the 1-
The influence that organized assemblies (micelles, microemulsions) and semiconductor colloids exhibits on chemical reactions has been investigated. In particular electron transfer reactions induced by light in the presence of semiconductor particles have been shown to completely degrade several haloaromatic compounds. Phenol degradation has been investigated by carrying out experiments at different pH, phenol and TiO2 content, oxygen partial pressure. Intermediate compounds (quinol and catechol) were detected and quantitative formation of CO2 was assessed. Similarly, the photocatalytic degradation of 2,4,5-trichlorophenoxy acetic acid (2,4,5-T) and 2,4,5-trichlorophenol on TiO2 led to complete mineralization into CO2 and HCl. In the degradation of 2,4,5-T several intermediates were detected by GC-MS and a scheme for the photodegradation pathways was formulated. The applicability of this degradation process to other haloaromatic compounds was preliminarily assessed. Keywords: Oxidation; Photocatalysis;
Here the chlorobenzamide group is coupled onto the molecule before the indole-forming step, eliminating the need for carboxylate protection. The synthesis starts with (5), a β-sulfonate modified aryl hydrazine. Acylation of aryl hydrazines normally occurs preferentially at the β-nitrogen. In contrast, The sulfonate group of (5) is electron-withdrawing, reducing the nucleophilicity of the β-nitrogen and favoring acylation at the α-position [2]. The α-acyl-arylhydrazine (6) can therefore be prepared from (5) by pyridine-catalyzed acylation with 4-chlorobenzoic acid chloride. This process is mechanistically equivalent to the pyridine-catalyzed acylation of the previous synthesis. Afterward, the sulfonate is readily hydrolyzed by treatment with dilute acid ...
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Isolation and characterization of the three polypeptide components of 4-chlorobenzoate dehalogenase from Pseudomonas sp. strain CBS-3 ...
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Advantages of meta-chloroperbenzoic acid are its handling because it is present as a powder (crystalline white solid), which can be kept in the refrigerator. Nevertheless, a material of purity ,75% is rarely available commercially, since the pure compound is not particularly stable. mCPBA is a strong oxidizing agent that may cause fire upon contact with flammable material.. MCPBA is versatile applicable as peracid for use in laboratories. The main areas of use are the conversion of ketones to esters (Baeyer-Villiger oxidation), epoxidation of alkenes, conversion of silyl enol ethers to silyl α-hydroxy ketones, oxidation of sulfides to sulfoxides and sulfones, and oxidation of amines to produce amine oxides.. For reasons of the atomic economy, the use of MCPBA in production should be avoided. The research concentrates on this area rather on the use of hydrogen peroxide in connection with suitable catalysts or in situ generated, simpler peracids, such as peracetic acid or on potassium ...
Advantages of meta-chloroperbenzoic acid are its handling because it is present as a powder (crystalline white solid), which can be kept in the refrigerator. Nevertheless, a material of purity ,75% is rarely available commercially, since the pure compound is not particularly stable. mCPBA is a strong oxidizing agent that may cause fire upon contact with flammable material.. MCPBA is versatile applicable as peracid for use in laboratories. The main areas of use are the conversion of ketones to esters (Baeyer-Villiger oxidation), epoxidation of alkenes, conversion of silyl enol ethers to silyl α-hydroxy ketones, oxidation of sulfides to sulfoxides and sulfones, and oxidation of amines to produce amine oxides.. For reasons of the atomic economy, the use of MCPBA in production should be avoided. The research concentrates on this area rather on the use of hydrogen peroxide in connection with suitable catalysts or in situ generated, simpler peracids, such as peracetic acid or on potassium ...
Cometabolism of Chlorinated Solvents by Nitrifying Bacteria: Kinetics, Substrate Interactions, Toxicity Effects, and Bacterial ResponseCometabolism of
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Kharat SS, Tripathi V, Damodaran AP, Priyadarshini R, Chandra S, Tikoo S, Nandhakumar R, Srivastava V, Priya S, Hussain M, Kaur S, Fishman JB, Sengupta S ...
3-Alkyl- and 3-aryl-3-hydroxyquinoline-2,4-diones have been prepared by oxidation of the corresponding 3-alkyl- or 3-arylquinolin-2-ones by means of oxygen under UV irradiation (Stadlbauer & Kappe, 1982), m-chloroperoxybenzoic acid (Stadlbauer & Kappe, 1982), hydrogen peroxide (Stadlbauer & Kappe, 1982), nitric acid (Stadlbauer et al., 1992), or peracetic acid (Stadlbauer et al., 1992). Several 3-hydroxyquinoline-2,4-diones were isolated from bacteria Pseudomonas aeruginosa (Neuenhaus & Budzikiewicz, 1979) and from stem bark of Micromelum falcatum (Luo et al., 2009). Biological activity of several 3-hydroxyquinoline-2,4-diones has been investigated (Prisyazhnyuk et al., 1984; Luo et al., 2009). 3-Alkyl- and 3-aryl-3-hydroxyquinoline-2,4-diones are important synthetic intermediates for the preparation of new types of heterocyclic compounds.. The asymmetric unit of the title compound (I) consists of a single 3-ethyl-3-hydroxy-8-methoxyquinoline-2,4(1H,3H)-dione molecule and solvated water molecule ...
Comprehensive chemicals list for Quinoline, 1-ethyl-1,2,3,4-tetrahydro-2,2,4-trimethyl-,Quinolinium,1-ethyl-2-[(3-ethyl-2(3H)-benzoselenazolylidene)methyl]-6-methyl-, iodide (1:1),Quillaja bark,Quinolinium,1-ethyl-8-[[(propylamino)carbonyl]oxy]-, iodide (1:1),quinolin-8-yl 3,4-dichlorobenzoate,Quinoxaline,2,3,6-trimethyl-,Quinoxaline,1,2,3,4-tetrahydro-1,4-bis(1-oxopropyl)- (9CI),Quinoline,2,6,8-trimethyl-,Quinoline,2,3,4,5,6,7,8-heptafluoro-,
The phosphoenolpyruvate (PEP)-dependent phosphotransferase system (PTS) is a major mechanism used by bacteria for uptake of carbohydrates, particularly hexoses, hexitols, and disaccharides, where the source of energy is from PEP. The PTS consists of two general components, enzyme I (EI) and histidine phosphocarrier protein (HPr), and of membrane-bound sugar specific permeases (enzymes II). Each enzyme II (EII) complex consists of one or two hydrophobic integral membrane domains (domains C and D) and two hydrophilic domains (domains A and B). EII complexes may exist as distinct proteins or as a single multidomain protein. The PTS catalyzes the uptake of carbohydrates and their conversion into their respective phosphoesters during transport. There are four successive phosphoryl transfers in the PTS. Initial autophosphorylation of EI, using PEP as a substrate, is followed by transfer of the phosphoryl group from EI to HPr. EIIA catalyzes the self-phosphoryl transfer from HPr after which the ...
aacggcatag tgcgtgttta 6540tgcttaaatg cgtacttata tgcgtctatt tatgtaggat gaaaggtagt ctagtacctc 6600ctgtgatatt atcccattcc atgcggggta tcgtatgctt ccttcagcac taccctttag 6660ctgttctata tgctgccact cctcaattgg attagtctca tccttcaatg ctatcatttc 6720ctttgatatt ggatcatatg catagtaccg agaaactagt gcgaagtagt gatcaggtat 6780tgctgttatc tgatgagtat acgttgtcct ggccacggca gaagcacgct tatcgctcca 6840atttcccaca acattagtca actccgttag gcccttcatt gaaagaaatg aggtcatcaa 6900atgtcttcca atgtgagatt ttgggccatt ttttatagca aagattgaat aaggcgcatt 6960tttcttcaaa gctttattgt acgatctgac taagttatct tttaataatt ggtattcctg 7020tttattgctt gaagaattgc cggtcctatt tactcgtttt aggactggtt cagaattcct 7080caaaaattca tccaaatata caagtggatc gatcctaccc cttgcgctaa agaagtatat 7140gtgcctacta acgcttgtct ttgtctctgt cactaaacac tggattatta ctcccagata 7200cttattttgg actaatttaa atgatttcgg atcaacgttc ttaatatcgc tgaatcttcc 7260acaattgatg aaagtagcta ggaagaggaa ttggtataaa gtttttgttt ttgtaaatct 7320cgaagtatac tcaaacgaat ttagtatttt ctcagtgatc tcccagatgc tttcaccctc ...
2PIM: Crystal structure of Phenylacetic acid degradation-related protein (YP_298971.1) from Ralstonia eutropha JMP134 at 2.20 A resolution
Compared with mCPBA, the advantages of using dioxiranes are neutral reaction conditions, easy workup (since the byproduct is only acetone), and low cost of the reagents. However, dioxirane reagents are unstable and have to be prepared freshly for each experiment. These reagents require purification by vacuum distillation and somewhat special handling.. For certain substrates, direct hydroxylation of unactivated aliphatic C-H bonds is possible.. ...
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File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR ...
By Stephen Simpson. At the risk of sounding a bit mean, CareFusion (NYSE:CFN) doesnt get all that much attention in the market. The company has a solid business between its operations in pharmaceutical dispensing, infusion, respiratory care, and procedural disposables, but it never really seems to get much attention unless/until theres another round of news about infusion pumps - a business where rivals like Baxter (NYSE:BAX) and Hospira (NYSE:HSP) have seen recalls that benefited CareFusion. That has changed very recently, though, as CareFusion seems to be a key potential acquirer for at least 2 medical device businesses known to be on the block - ICU Medical (NSDQ:ICUI) and Smiths Groups (LON:SMIN) Smith Medical. CareFusion has long been an active acquirer and recently not only reaffirmed its commitment to future deals, but a willingness to do larger deals than before. While both ICU Medical and Smiths Medical make solid sense for CareFusion, both deals have certain drawbacks as well. ICU ...
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This page includes the following topics and synonyms: Ortho-Tricyclen, OrthoTricyclen, Ortho Tricyclen, Ortho Tri-Cyclen, Tri-Sprintec.
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Herein, we report the iron-catalyzed C(sp2)-C(sp3) Kumada cross-coupling of aryl chlorobenzoates with alkyl Grignard reagents. ... Iron-Catalyzed C(sp2)-C(sp3) Cross-Coupling of Aryl Chlorobenzoates with Alkyl Grignard Reagents by Elwira Bisz ... Bisz E, Szostak M. Iron-Catalyzed C(sp2)-C(sp3) Cross-Coupling of Aryl Chlorobenzoates with Alkyl Grignard Reagents. Molecules ... Herein, we report the iron-catalyzed C(sp2)-C(sp3) Kumada cross-coupling of aryl chlorobenzoates with alkyl Grignard reagents. ...
B4 towards polychlorobiphenyls and chlorobenzoates. FEMS Microbiol Ecol 60:322-328CrossRefPubMedGoogle Scholar ... polychlorobiphenyls and chlorobenzoates: effects on chemotaxis-, biofilm- and planktonic-grown cells. FEMS Microbiol Ecol 74: ...
Krooneman, J. (1999). Ecophysiological studies on bacterial degradation of chlorobenzoates. Groningen: s.n. ...
B4 towards polychlorobiphenyls and chlorobenzoates. FEMS Microbiol. Ecol. 60, 322-328. doi: 10.1111/j.1574-6941.2007.00293.x ...
B4 towards polychlorobiphenyls and chlorobenzoates. FEMS Microbiol. Ecol. 60:322-328.. OpenUrlCrossRefPubMedWeb of Science ...
Enhanced phytoremediation of chlorobenzoates in rhizosphere soil. Soil Biol. Biochem. 31 1999 299 305 ...
The substrate specificity of the necessary transporters may limit the transfer of chlorobenzoates into the cell (Yuroff et al ... Strains used in this work, and new substrates mineralized (chlorobenzoates and chlorobiphenyls). ... The initial pH was raised to 7.5 when growing on chlorobenzoates or chlorobiphenyls (5 mM), and to initially pH 8.0 when ... Especially chlorobenzoates had been identified in various previous publications, although at least the monohalogenated isomers/ ...
Above Room Temperature Organic Ferroelectrics: Diprotonated 1,4-Diazabicyclo[2.2.2]octane Shifts between Two 2-Chlorobenzoates. ...
... chlorobenzoates, phenates, acetates, sulfobetaines, hydroxysultaines, and so forth. Preferably, sulfates and sulfonates are ...
Comments: Also acts on 2-, 3- and 4-fluorobenzoate, but only very slowly on the corresponding chlorobenzoates.. Links to other ...
4-chlorobenzoates, benzenesulphonates, p-toluenesulphonates, naphthalenesulphonates, methanesulphonates, sulphamates, ...
B4 towards polychlorobiphenyls and chlorobenzoates. FEMS Microbiol Ecol. 2007, 60: 322-328. 10.1111/j.1574-6941.2007.00293.x. ...
... chlorobenzoates, methylbenzoates, dinitrobenzoates, hydroxybenzoates, methoxybenzoates, phthalates, sulfonates, ...
... chlorobenzoates, methylbenzoates, dinitrobenzoates, hydroxybenzoates, methoxybenzoates, phthalates, sulfonates, ...
... chlorobenzoates, methylbenzoates, dinitrobenzoates, hydroxybenzoates, methoxybenzoates, phthalates, sulfonates, ...
... to pentachlorobiphenyls and their degradation to chlorobenzoates by the bph-encoded catabolic pathway of Burkholderia sp. ...
strain NK8 arc involved in chlorobenzoate degradation and induced by chlorobenzoates and chlorocatechols. Gene 268: 207- 214.. ... strain NK8 involved in the catabolism of chlorobenzoates. Microbiology 147: 121- 133.. ...
Sasazuki, T., Kaneoka, H., Nishimura, Y., Kaneoka, R., Hayama, M. & Ohkuni, H., Dec 1 1980, In : Journal of Experimental Medicine. 152, 2 II, p. 297-311 15 p.. Research output: Contribution to journal › Article ...
Duan, L., Duan, L., Duan, L., Duan, L., Wang, B., Wang, B., Heck, K., Heck, K., Guo, S., Guo, S., Clark, C. A., Clark, C. A., Arredondo, J., Wang, M., Wang, M., Senftle, T. P., Westerhoff, P., Westerhoff, P., Wen, X., Song, Y. & 7 others, Song, Y., Wong, M. S., Wong, M. S., Wong, M. S., Wong, M. S., Wong, M. S. & Wong, M. S., 2020, (Accepted/In press) In : Environmental Science and Technology Letters.. Research output: Contribution to journal › Article ...
... chlorobenzoates, methylbenzoates, dinitrobenzoates, hydroxybenzoates, methoxybenzoates, phthalates, xylenesulfonates, ...
... ethyl chlorobenzoates, butyl benzoate, isobutyl benzoate,, methyl anisate, ethyl anisate, methyl p-toluate, hexyl benzoate, and ...
strain NK8 involved in the catabolism of chlorobenzoates Perigio B. Francisco Jr, Naoto Ogawa, Katsuhisa Suzuki and Kiyotaka ... The genes encoding the oxidation of (chloro)benzoates (cbeABCD) and catechol (catA, catBC), the LysR-type regulatory gene cbeR ...
Chlorobenzoates / therapeutic use Actions. * Search in PubMed * Search in MeSH * Add to Search ...
Soares-Santos, M., Palmese, A., Hartley, W., Annis, J., Garcia-Bellido, J., Lahav, O., Doctor, Z., Fishbach, M., Holz, D. E., Lin, H., Pereira, M. E. S., Garcia, A., Herner, K., Kessler, R., Peiris, H. V., Sako, M., Allam, S., Brout, D., Rosell, A. C., Chen, H. Y. & 1,182 others, Conselice, C., Derose, J., Devicente, J., Diehl, H. T., Gill, M. S. S., Gschwend, J., Sevilla-Noarbe, I., Tucker, D. L., Wechsler, R., Berger, E., Cowperthwaite, P. S., Metzger, B. D., Williams, P. K. G., Abbott, T. M. C., Abdalla, F. B., Avila, S., Bechtol, K., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Kind, M. C., Carretero, J., Castander, F. J., Crocce, M., Cunha, C. E., Dandrea, C. B., Da Costa, L. N., Davis, C., Desai, S., Doel, P., Drlica-Wagner, A., Eifler, T. F., Evrard, A. E., Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gutierrez, G., Hollowood, D. L., Hoyle, B., James, D. J., Jeltema, T., Kuehn, K., Kuropatkin, N., Li, T. S., Lima, M., Maia, ...
Iron-catalyzed C(sp2)-C(sp3) cross-coupling of aryl chlorobenzoates with alkyl grignard reagents. Bisz, E. & Szostak, M., Jan 6 ...
Chlorobenzoates/metabolism. *DNA Transposable Elements/genetics*. *DNA Transposable Elements/physiology. *Environmental ...
Above Room Temperature Organic Ferroelectrics: Diprotonated 1,4-Diazabicyclo[2.2.2]octane Shifts between Two 2-Chlorobenzoates ...
Chlorobenzoates Chemical Compounds * 4-chlorobenzoic acid Chemical Compounds * Liquid chromatography Chemical Compounds ...
  • Regiospecificity of dioxygenation of di- to pentachlorobiphenyls and their degradation to chlorobenzoates by the bph-encoded catabolic pathway of Burkholderia sp. (naver.com)
  • Additionally, strains of Klebsiella oxytoca have been demonstrated to degrade chlorobenzoic acid in liquid medium and use mono and di-chlorobenzoates as sole carbon sources (U.S. Pat. (justia.com)