butanones

..Results indicate that hydroxyimine is a useful intermediate prodrug structure for ketone drugs...

..Results indicate that fungal biofilters can be an effective alternative to conventional abatement technologies for treating solvent contaminated off-gases even under discontinuous loading conditions...

..The authors were unable to find any similar case report in the literature...

..The VOC monitor will be useful for reducing occupational exposure. Since the VOC monitor provides detailed data of individuals' exposures to organic solvents...

..Experimental observations are supplemented by qualitative polymer physics interpretations regarding the structure of the films upon casting and compression...

..These results also support the stronger hydrogen bond in the title compound with respect to the parent molecule...

..The best conditions for separation of the individual compounds and their metabolites were chosen on the basis of resolution, retention times, and peak symmetry...

..It has been found that the stability constants for the complexes decrease with the salt concentration; the causes are discussed...

..Halitosis can have an intra- or extra-oral origin. In all cases, bad breath is caused by the presence of volatile organic compounds originating from the mouth or the expired air. They can be specific for certain diseases or infections...

..Selective COX-2 inhibition with nimesulide and COX-1 inhibition with low-dose aspirin appear to be well-tolerated in the short-term...

..Compared with COX-2 selective inhibitors, nabumetone exhibits similar anti-inflammatory and analgesic properties in patients with arthritis and there is no evidence of excess GI or other forms of complications to date...

..CONCLUSION: Rofecoxib 12.5 mg daily demonstrated better efficacy over 6 weeks of treatment and quicker onset of OA efficacy over the first 6 days than nabumetone 1,000 mg daily. Both therapies were generally well tolerated...

..CONCLUSIONS: Celecoxib and indometacin both decreased the epithelial proliferative response and delayed healing of cryoprobe-induced gastric ulcers. In contrast, nabumetone impaired ulcer healing only at very high doses...

..Because nonsteroidal anti-inflammatory drug (NSAID) intolerance depends on COX-1 inhibition, preferential or selective COX-2 inhibitors have been thought to be well tolerated by these patients...

..To compare the effects of nabumetone and meloxicam, two cyclo-oxygenase-2 (COX-2) preferential nonsteroidal anti-inflammatory drugs (NSAIDs), on platelet COX-1 activity and platelet function...

..Rofecoxib and nabumetone were developed to provide gastrointestinal benefits over traditional nonsteroidal antiinflammatory drugs (NSAIDs). However, there is limited comparative information relating to these 2 drugs...

..Etodolac appeared to have the least effect on contractile activity, compared with the effects attributable to nabumetone, and would potentially have the fewest adverse effects relative to motility of the dorsal and ventral colon...

..05) with the official (B.P) HPLC method. The new method is simple, has the main advantage of employing a more affordable instrumentation and could find application in routine in-process quality control of nabumetone tablets...

..After 30-days storage, the stability of the studied ketones was excellent on Carboxen 564. This sorbent had a nearly negligible ash content and the adsorbed water was much lower than for the other sorbents tested...

..The lowest-observed-adverse-effect-levels (LOAELs) measured in vitro were close to blood solvent concentrations reported for individuals exposed to the agents at levels at or below their individual threshold limit values (TLVs)...

..The objective of this study was to evaluate exhaled NO levels in synthetic leather workers exposed to organic solvents toluene, xylene and methylethyl ketone...

..The effect of this new EMT scheme is more gradual, with attractive flexibility to continuously fine-tune the balance between the desired noise reduction effect and the retention of pertinent spectral information...

..It is concluded that toxicity in immune-derived T cells may exhibit greater than additive effects when there is coexposure to organic solvents. This may have implications for risk assessment of environmental exposure to these agents...

..Urinary concentration of NMF and DMF, corresponding to the 8-hour exposure to airborne DMF at 30 mg/m, was estimated to 38.4 mg/L or 39.4 mg/g creatinine for NMF and to 0.92 mg/L or 0.96 mg/g creatinine for DMF...

..02 microg/m3. The minimum detection limit of 0.012 microg/m3 is below that of other published methods. Methacrolein, methyl vinyl ketone, crotonaldehyde, glyoxal, methyl glyoxal, and benzaldehyde were also quantified...

..These two hydrogen-bonding interactions are important for the reactivity and enantioselectivity of the direct asymmetric aldol condensation...

..This review describes pharmaceutical solids in terms of supramolecular chemistry and crystal engineering concepts, and discusses the events that control crystallization and solid phase transformations...

..The remainder of the styrene and the ship's main bunker fuel were recovered from the wreck on the seabed, whilst the two chemical solvents were released to the water column in a slow, controlled manner...

..For example, conventional harmonic and quasiharmonic entropy estimation procedures produce disparate results for the relatively simple protein-ligand systems studied in this work...

..The simple model of hydration, proposed to better justify the results, connects the values obtained from the methods providing microscopic and macroscopic characteristics of the system studied...

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..We conclude that the three NSAID did not neutralize the antihypertensive effect of the combination of fosinopril and HCTZ, and hence the blood pressure lowering action of the combination may not be prostaglandin dependent...

..These facts strongly suggested that gastrointestinal damage by NSAIDs was more severe in beta-glucan-administered mice, resulting in peritonitis by enteric bacteria and leading to death...

..Thus, in the rofecoxib osteoarthritis development program, there was no difference between rofecoxib, comparator nonselective NSAIDs, and placebo in the risks of cardiovascular thrombotic events...

..6-MNAA was phototoxic to C. albicans, C. lipolytica and C. tropicalis. A mechanism involving singlet oxygen, radicals, and electron transfer reactions is suggested for the observed phototoxicity...

..The striking distal predilection of nabumetone may be, at least partially, explained by distal bowel over-expression of COX-2 and PPAR-delta...

..We also collapse cases into series for the identification of possible risk factors for clinically severe, NSAID-associated hypertension...

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..In close analogy with the common experimental observation of entropy-enthalpy compensation, the computed entropy changes show a near-linear relationship with the changes in mean potential plus solvation energy...

..In conclusion, we demonstrate that the differential mechanisms for beta-catenin suppression may be determined, at least partly, by GSK-3beta...

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..CONCLUSIONS: Naproxen CR is an effective and tolerable drug in the treatment of knee OA. Efficacy and safety profiles are comparable to those of nabumetone...

..However, the gastrointestinal safety profile of nabumetone was superior to that of diclofenac with respect to elevation of liver enzymes...

..Nabumetone was found to be useful in reducing pulpitis, external root resorption, and pain caused by intrusive orthodontic movement, without altering tooth movement in response to the application of orthodontic force...

..We investigated the latter possibility using electron paramagnetic resonance spectroscopy...

..5 mg (P = .01) compared with nabumetone. Rofecoxib treatment, with its faster onset of OA efficacy and lower rates of related discontinuations, might provide efficacy advantages in the treatment of OA pain...

A novel one-pot method was developed for the synthesis of the title compounds starting from 4-chloro-1-aryl-1-butanones 1, phosphorus trichloride and acetic acid. The end products 2 were obtained in 20-94% yield...

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..The preference for endo addition of MVK to the parent, 5-methyl, and 6-methyl-DHPs was successfully predicted by calculations at the B3LYP/6-31G* theory level...

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..g., 99.6% ee (R) in TFE vs 71.2% ee (S) in methyl ethyl ketone)...

..nematophila also inhibited the PO enzyme activity. However, modification of the core structure by hydroxylation of BZA lost its strong inhibitory activity against the activated PO...

..Congener analysis of the gastric contents and the femoral blood indicated the uptake of a fruit distillate or its foreshot...

..Presented application concerns analysis of chosen NSAIDs from pharmaceutical formulations and biological samples...

..Accordingly, 5f can serve as lead for developing novel inhibitors against RT that may be used to suppress HIV-1 growth...

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..These compounds could be detected at doses > or =0.5 kGy but not in non-irradiated samples. The three types of treatments had no significant effect on the levels of 2-alkylcyclobutanones...

..The highest solubilisation capacities were found for a copolymer with worm-like micelles...

..This system provides a platform to study cell-surface phenomena with a degree of chemical control that cannot be achieved using conventional biological tools...

..The metabolism of SAMe can be affected by geographic or ethnic factors. However, its efficacy and tolerability versus NSAIDs have not been reported in an Asian population...

..The skin sensitisation test was negative. The safety profile in the toxicity tests and the basic cidal activity against the strains tested suggest that 2-butanone peroxide in the control of hospital infections...

..Finally, these observations provide the impetus for the design of a new family of inhibitors of Pol beta...

..Treatment with a combination of N-acetylcysteine and haemodialysis may be a promising therapy for this severe and potentially life-threatening intoxication...

..For spin systems with small scalar coupling constants, well-resolved J-spectra can be achieved by selecting a proper scaling factor. Theoretical predictions are in good agreement with simulation results and experimental observations...

..Specific reactivity (SR) with the new TWC was reduced from 5.92 to 5.72 for M15 and from 7.00 to 6.93 for M100, indicating that M15 and M100 with the new TWC were friendlier to the environment...

..The loss rate by tree uptake was the highest, followed by the reaction with OH radicals, even at a high OH concentration (0.15 pptv) both for MACR and MVK, suggesting that tree uptake provides a significant sink...

..We report a patient with poisoning due to methyl ethyl ketone peroxide who presented with upper gastrointestinal bleeding, and developed gangrene of the bowel and died of septicaemia and multiorgan failure...

..The electronic spectrum of the singlet biradical, confirmed by femtosecond pump-probe studies in solution, was matched by coupled cluster calculations with single and double corrections...

A series of 1-azolyl-4-phenyl-2-butanones was designed and synthesized for the inhibition of heme oxygenases (heme oxygenase-1 and heme oxygenase-2)...

..methyl ketones in the presence of a catalytic amount of (S)-5-(pyrrolidin-2-yl)-1H-tetrazole in dichloroethane at 40 °C proceeds smoothly to produce (R)-4,4,4-trifluoro-1-aryl-3-hydroxy-1-butanones in high yields with up to 90% ee.

..15). It blocks amphetamine induced hyperactivity/stereotypy and secondary conditioned avoidance responses in rodents at lower doses than those required for the neuroleptic drugs haloperidol and centbutindole (biriperone)...

..The slightly lower concentration of HMPC found to be present on the surface of the halofantrine nanoparticles compared with the nabumetone nanoparticles suggested a differing affinity of the polymer for the surface of the two drugs...

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..This condition is not adequate to play the role, formerly proposed for diacetyl reductases, of regulating the equilibrium between oxidized and reduced forms of pyridine-nucleotides...

..Within 2 - 8 weeks of treatment, the effective rate and rate of adverse drug reaction with commonly used NSAIDs as nabumeton, meloxicam, etc., were 59.2% - 85.0% and 4.2% - 33.6%, respectively...

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..The result indicates that the distinction of different band responses has already been accomplished effectively by the original asynchronous 2D correlation analysis...

..These initial data support the possibility that a single full dose of nabumetone can be tried as a safe alternative in most patients with a hypersensitivity reaction to ns-NSAIDs...

..The principal effects resulting from exposures to MEK and MIBK at the durations and concentrations used in the study are limited to sensory and irritant effects...

..The role of conformation and puckering of the glycon moiety in modulating the biological activity and also the use of carbanucleosides as building blocks to prepare oligonucleotides are carefully illustrated...

..For these investigations, anterior rhinomanometry was usable, but acoustic rhinometry can be recommended only after sufficient standardization has occurred. Furthermore, biochemical parameters of nasal mucosa must be considered...

..However, the amounts of these substances detected in the adipose tissues and in the feces were much smaller than the amounts ingested...

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..Among the compounds evaluated for their antimycobacterial activity, compound (10) showed the desired activity in the range of 3.125 microg/mL...

..On the other hand, there is a possibility that dexamethasone works through a mechanism other than 5-HT release in delayed emesis...

..The aim of the present study was to describe the influence of co-exposure to MEK on n-hexane toxicokinetics in humans...

..Nabumetone caused a moderate increase of day and night BP, without changes in biological diurnal variation...

..In contrast, liver microsomes produced R-PBYOL together with the S-enantiomer to some extent. Ethoxyresorufin-O-dealkylase activity in rat liver microsomes was markedly inhibited by PBYO and PBO, partly by PBYOL, but not by PBA...

..PBO was mutagenic in the Ames test using Salmonella typhimurium TA 100 when S-9 mix was added, but PBA and PBOL were not. It appears that PBO is mainly metabolized to PBA in vivo in rats and dogs as a detoxification pathway...

..The study was to screen the possible risk factors of adverse drug reaction (ADR) induced by non-steroidal anti-inflammatory drugs (NSAIDs) in Shanghai patients with arthropathy...

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..Understanding the role and mechanism of axon atrophy in solvent neurotoxicity has broad-based implications for human occupational health and risk assessment. ..

..Results could lead to a better understanding of acquired and inherited human neuropathies and the development of efficacious pharmacotherapies. ..

..Determining how these chemicals work will provide a rational basis for establishing occupational exposure conditions and for development of efficacious pharmacotherapeutic approaches. ..

..In addition, our studies might suggest novel pharmacotherapies based on neurotrophin intervention or replacement. ..

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..Understanding the role and mechanism of axon atrophy in solvent neurotoxicity has broad-based implications for human occupational health and risk assessment. ..

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..In addition, this proposal might have broad-based implications for other toxic chemicals (acrylamide, carbon disulfide) and disease processes (diabetes) associated with axonal atrophy. ..

..This proposal helps to address this key challenge by developing the underlying initial technology within classes of compounds having demonstrably antitumor or antiviral activities. ..

..Our approach is to develop a minimally intrusive, highly accurate pre-screen that would allow tailoring timing/intensity of screening and surveillance. ..

..These new synthetic methods apply to many structural types beyond those illustrated and constitutes a significant to gain access to complex molecular targets more easily. ..

..These new synthetic methods apply to many structural types beyond those illustrated and constitutes a significant to gain access to complex molecular targets more easily. ..

..In the future these spectral markers may be assayed with a 4D-ELF probe during rectal examination, thus providing a practical and accurate means of determining the optimal CRC screening regimen. ..

..This could have major importance for colon cancer prevention efforts in the United States. ..

..By expediting access to very diverse arrays of structural types, the best opportunities to discover new therapeutic agents arise. ..

..These new synthetic methods apply to many structural types beyond those illustrated and constitutes a significant to gain access to complex molecular targets more easily. ..

..By accessing a very diverse range of structural types, the best opportunities to discover new therapeutic agents arise. ..

..A strategy to one family of tumor promoters represented by teleocidin explores the concept of chemical chameleons. In most cases, the strategy also considers the problem of absolute stereochemistry...

..The diversity of the challenges posed by antiviral and antitumor agents represent highly meaningful tests of their use...

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..Equally important, new avenues to vary structure around these cores in order to establish structure-activity relationships with the aim to create better therapeutic agents become available. ..

..This new concept sets the stage for solutions to a long standing problem, the ion channel blockers, the grayanotoxins. as well as the more recently discovered rameswaralide, a potent antiinflamatory. ..

..The result of this study will further support the role of cigarette smoking and underscore the likelihood of dietary fat as a modulator of the development of human pancreatic cancer that is suggested by epidemiological observations. ..

..Ring expansion methods may convert these cores into the taxoid skeleton with appropriate functionality at key points for analog development. ..

..Upon completion, the project should provide an answer as to whether there is a relationship between the type of combined effect obtained and the molecular site(s) of action of the agents. ..