In this study, the performance of ammonium tagged Hoveyda-Grubbs catalyst supported on magnetically separable core/shell silica gel was tested on carboxylic acid addition reactions to terminal alkynes using a variety of carboxylic acid derivatives under air atmosphere. The catalytic system was f...
The synthesis routes and the properties of PENs are reviewed in this chapter. Monomers for PEN are summarized. PENs have been prepared according to a nucleophilic route and an electrophilic route. PEKs that are subsequently end capped with nitrile functions have been prepared by Friedel-Crafts p...
Due to widespread accumulation of polybrominated diphenyl ethers (PBDEs) in our surroundings, it is important to clarify their fate in the environment and the options of their elimination. The aim of this study was to monitor the biodegradation of the most frequent congeners (BDE 28, 47, 49, 66,...
Polybrominated diphenyl ethers (PBDEs) are emerging persistent organic pollutants and the degradation of PBDEs is still a tremendous challenge owing to their extreme persistence and recalcitrance. In this study, Pseudomonas putida was employed for bioremediation of four PBDE congeners (BDE47, 15...
This paper is part of our study of the frother structure-property relationship using bubble rise velocity as the property. Single bubble rise velocity profiles were determined for surfactants of the polyethylene glycol (PEG) family in a 350-cm column, and the concentration to reach minimum veloc...
Glycol ethers are a complex family of more than 30 substances that exhibit a wide range of toxicological properties. This complexity can lead to confusion over which are of real concern and which do not pose significant hazards. Also, many have not been reviewed under the European hazard classif...
The use of glycol ethers and their effects on health have recently attracted the attention of the French health authorities. At their request, INSERM, the French Institute of Health and Medical Research, conducted a collective expertise review on glycol ethers in 1999. INSERM Expertise Reviews a...
Rate coefficients for the gas-phase reactions of Cl atoms with three isomers of dimethylbenzaldehyde (DMBs) have been determined using the relative rate method. Relative rate measurements were performed in a Teflon reaction chamber at 298 ± 3 K and atmospheric pressure. The rate constants obtai...
The phosphorescence spectra and lifetimes of 2,4-, 2,5-, and 3,4-dimethylbenzaldehydes dispersed in durene single crystals have been measured as a function of temperature between 10 and 200 K. For all the guests involved, the vibrational structures of the spectra are found to be temperature depe...
A series of new selective, high affinity A1-AdoR agonists is reported. Compound 23 that incorporated a carboxylic acid functionality in the 4-position of the pyrazole ring displayed KiL value of 1 nM for the A1-AdoR and >5000-fold selectivity over the A3 and A2A-AdoRs. In addition, compound 19 t...
A series of 2-hydrazinyladenosine derivatives was synthesized and investigated in radioligand binding studies for their affinity at the adenosine receptor subtypes with the goal to obtain potent and A2AAR selective agonists and to explore the structure–activity relationships of this class of co...
The structure–affinity relationships of two novel 2-substituted adenosine series containing a substituted pyrazole attached at the N-1 or C-4 position for the adenosine (ADO) A2A receptor are described. Compounds in the 2-(N-1-pyrazolyl) adenosine series IV provided the highest affinity for the...
To obtain potential A2A adenosine receptor agonists, a series of 2-hydrazinyladenosine derivatives were synthesized and assayed for adenosine receptors activity using radioligand binding activity assays. The binding activity of the subtypes was examined, and the structure-activity relationship o...
1-[methyl-8-14C] Adenosine was synthesized and its metabolic fate was determined in intact rat. It was found that approximately 57% of 1-[methyl-8-14C] adenosine administered iv was excreted unchanged in the urine and 33% of the excreted radioactivity in the urine was associated with the major m...
A highly selective molecularly imprinted polymer (MIP) for 1-methyladenosine (1-MA), an urinary modified nucleoside used as cancer marker, was prepared and its use as solid-phase extraction (SPE) sorbent material was demonstrated. The MIP was prepared by a very simple procedure using methacrylic...
Detection and mapping of modified nucleotides in RNAs is a difficult and laborious task. Several physico-chemical approaches based on differential properties of modified nucleotides can be used, however, most of these methods do not allow high-throughput analysis. Here we describe in details a m...
The thermodynamic equilibrium of the bimolecular dehydration of 1-butanol to di-n-butyl ether (DNBE) and water in the liquid phase was studied. Equilibrium experiments were performed at 4 MPa and in the temperature range of 413–463 K over the ion exchange resin Amberlyst-70. The thermodynamic e...
Uptake and accumulation by plants is a significant pathway in the migration and transformation of phthalate esters (PAEs) in the environment. However, limited information is available on the mechanisms of PAE metabolism in plants. Here, we investigated the metabolism of di-n-butyl phthalate (DnB...
Effects of Cylindrotheca closterium, a marine benthic diatom, on the fate of di-n-butyl phthalate (DBP) in a water-sediment system were investigated. Model calculation results showed that DBP residue was 38.5% lower in the system with C. closterium than in the system without C. closterium. The n...
Crops can take up and accumulate di-n-butyl phthalate (DBP), an extensively used plasticizer with endocrine disrupting effect, which poses potential risk to human health. Our previous study found the genotype variation in accumulation of DBP by different cultivars of rice (Oryza sativa L.). Neve...
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