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Showing 1 to 20 of 31 for “"dimethylamine"”.
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The sublethal effects of 2,4-D dimethylamine on wood frog tadpoles in Saskatchewan
Declining amphibian populations in association with an incidence of deformities have been observed globally. These observations have alarmed the scientific community as well as the general public. Potential causes include exposure to pesticides; therefore two experiments were performed to test the …
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Biofilm-related Materials as Total N-nitrosamine (TONO) Precursors and Hydroxylamine-based Interferences in TONO and N-nitrosodimethylamine (NDMA) Measurements
… solvent for the SPE-TONO assay, with N-nitrosodimethylamine (NDMA) losses estimated to be 30% by SPE alone and an additional 15% from concentration of the methanol extracts by N2-gas blowdown. Three biofilm-derived materials - poly-N-acetylglucosamine (PNAG), Pseudomonas aeruginosa, and …
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Reductive Alkylation of Proteins Towards Structural and Biological Applications
… for mass spectrometry-assisted assignment of 13C-dimethylamine resonances in nuclear magnetic resonance spectroscopy (NMR). Reductive 13C-methylation is an alternative labeling method for proteins not amenable to bacterial host overexpression. Because reductive 13C-methylation adds sparse, …
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A study of the mannich reaction with certain phenols, of the causes of formation of coloured products and the prevention of their occurence
Mannich bases from dimethylamine, formaldehyde and phenol, m-cresol, eugenol, p-tent-pentylphenol, p-tert butylphenol, p-iso-propylphenol, 3,1,5-trimetbylphenol, resorcinol, 3-pentadecylphenol and the component phenols of cashew nut shell liquid (CNSL) have been prepared. Mannich bases have also …
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An in-vitro study investigating current and novel antimicrobial agents as potential topical treatments for cutaneous infections caused by bacteria, fungi and Leishmania
… treatments and rising resistance. Amidopropyl dimethylamine (APD) and amidopropyl quaternary ammonium (APQ) compounds were synthesised with varying chain lengths and saturation levels and compared to store bought cationic compounds. The compounds were evaluated through minimum inhibitory …
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Developing novel therapeutic agents for Acanthamoeba infection and investigating the process of encystment
… compounds including myristoleyl-amidopropyl-dimethylamine (MOPD) and palmitoleyl-amidopropyl-dimethylamine (POPD) into contact lens solutions showed complete kill at a 4.5-log reduction against trophozoites compared with myristamidopropyl dimethylamine (MAPD) as an existing compound. The …
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Physiological and phylogenetic studies of marine methanogenic bacteria
… cell wall. Acetate, methanol, methylamine, dimethylamine and trimethylamine are substrates for growth; formate and hydrogen are not. Sodium chloride and magnesium concentrations found in seawater are required for optimum growth. RNA homology values indicated that this isolate is a new …
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The Synthesis of C-aryl-18-nor-steroids From Resin Acids and Their Derivatives.
… the diketone with formaldehyde and dimethylamine hydro-chloride, yielded the Mannich base, which with methyl-iodide formed the methiodide salt plus the vinyl-phenyl-ketone derivative.Cyclization of the vinyl product by means of a melt of aluminum chloride sodium chloride gave the …
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Directed Ortho-Metalation of Dimethylarylamines
… of metalation of several dimethylarylamines. The dimethylamine-containing substituents constitute directing metalation groups (DMG's) for the various aryl systems investigated. Maximization of the extents of ortho-lithiation of dimethylaniline [DMG = - N(CH3)2] and dimethylbenzylamine [DMG = …
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Diels -Alder reactions of [60]fullerene with 1,2,4,5-tetrazines and additions to [60]fullerene-tetrazine monoadducts
… attacks by nonanethiol, thiophenol, methanol and dimethylamine have all been studied and are all are proposed to proceed along a similar pathway.</p>
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Preparation and Cycloaddition Reactions of Oxazoline Nitrogen Oxides
… dipolarophiles in concentrated solutions of dimethylamine hydrochloride in dichloromethane, however, led to the formation of isoxazoles. Competitive experiments demonstrated that 2,4,4-trimethyloxazoline N-oxide is at least 6,800 times more reactive toward phenyl isocyanate than the analogous …
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Activated carbon catalyzed nitrosamine formation via amine nitrosation
… the most commonly studied nitrosamine, N-nitrosodimethylamine, was shown to be highly dependent on initial dimethylamine (DMA) solution concentration, with yields of approximately 0.11% of the spiked secondary amine at pH 7.5. Morpholine and dibutylamine, larger and bulkier secondary amines, …
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Investigation of Polymeric Reagents for KCI Collection Furing Potash Flotation
… this research, the selectivity for KCl of four dimethylamine-epichlorohydrin and six polydiallyldimethylammonium chloride (polyDADMAC) polymers were examined to investigate the feasibility to be used as collectors during potash flotation. It was found that the polyDADMAC polymer, C-592, …
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Effect of combined UV and free chlorine on the formation of chloronitromethanes
… of total HNMs compared to methylamine (MA) and dimethylamine (DMA). The source of water can also affect which HNM species is formed in greater concentrations. The limited number of real water samples showed that the river waters have higher than normal total organic carbon (TOC) and dissolved …
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Development of a Novel Perfluoroalkyl Substance Sequestration Scheme Using Alginate Macrobeads and Common Water Treatment Polymers
… chloride) (polyDADMAC) and epichlorhydrin dimethylamine (EpiDMA) could be reliably and passively delivered to promote sequestration of PFASs. It was found that pumps behaved as expected with one failure near the end of pump lifespan. Next, alginate was investigated as an encapsulation media …
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The preparation and reactions of some 1, 2-dipolar species /|nI. D. Brindle. -- 260 St. Catharines, Ont. : [s. n.],
… bromide from N-allylN, N-dimethylamine-N-oxide. Sections 3 and 4 cover a number of unsuccessful attempts to synthesise other amineimides and l,2-dipolar species.
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(A). Regulation of B-/Z-DNA transition in modified oligonucleotides; (B). Synthesis of cationic BODIPY analogues for antimicrobial and anticancer applications
… and 110 (brominated-meso-dimethylamine-fluoro-BODIPY) showed excellent stability both in dark and in light conditions and were found to be very efficient in generating singlet oxygen when compared to RB.
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Formation and Quantification of Corrosion Deposits in the Power Industry
… CPSES presently uses an amine combination of dimethylamine (DMA), hydrazine and morpholine to control the water chemistry. Along with the abovementioned amines, this study also focuses on corrosion inhibition mechanismsof a new amine DBU (1, 8-diazabicyclo [5.4.0] undec-7-ene). Electrochemical …
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Improved swellable polymer microspheres for chemical sensing
… particle size.</p><p>Microspheres of 2-(dimethylamine)ethyl methacrylate (DMAEMA) and 4-vinyl pyridine (4VP) were synthesized with various comonomers including 2-hydroxyethyl methacrylate (HEMA), methyl methacrylate (MMA) and styrene. Microparticles made of DMAEMA and HEMA did not …
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Electroless deposition of group eight metals
… palladium (H) ions in the presence of dimethylamine borane as the reducing agent. At a pH of 10.5 the solution deposits bright adherent coatings at 1 μm per 10 h. The plating solution operates at room temperature within narrow limits of composition and concentration: small deviations in …
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